1992-01-15 22:33:30 +01:00
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/* Data flow analysis for GNU compiler.
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1999-01-12 00:15:28 +01:00
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Copyright (C) 1987, 88, 92-98, 1999 Free Software Foundation, Inc.
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1992-01-15 22:33:30 +01:00
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This file is part of GNU CC.
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GNU CC is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU CC is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU CC; see the file COPYING. If not, write to
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1995-06-15 13:52:21 +02:00
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the Free Software Foundation, 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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1992-01-15 22:33:30 +01:00
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1999-02-26 00:45:42 +01:00
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/* This file contains the data flow analysis pass of the compiler. It
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computes data flow information which tells combine_instructions
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which insns to consider combining and controls register allocation.
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1992-01-15 22:33:30 +01:00
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1999-02-26 00:45:42 +01:00
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Additional data flow information that is too bulky to record is
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generated during the analysis, and is used at that time to create
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autoincrement and autodecrement addressing.
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1992-01-15 22:33:30 +01:00
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The first step is dividing the function into basic blocks.
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find_basic_blocks does this. Then life_analysis determines
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where each register is live and where it is dead.
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** find_basic_blocks **
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1999-02-26 00:45:42 +01:00
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find_basic_blocks divides the current function's rtl into basic
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blocks and constructs the CFG. The blocks are recorded in the
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basic_block_info array; the CFG exists in the edge structures
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referenced by the blocks.
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1992-01-15 22:33:30 +01:00
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1999-02-26 00:45:42 +01:00
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find_basic_blocks also finds any unreachable loops and deletes them.
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1992-01-15 22:33:30 +01:00
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** life_analysis **
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life_analysis is called immediately after find_basic_blocks.
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It uses the basic block information to determine where each
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hard or pseudo register is live.
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** live-register info **
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The information about where each register is live is in two parts:
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1999-02-26 00:45:42 +01:00
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the REG_NOTES of insns, and the vector basic_block->global_live_at_start.
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1992-01-15 22:33:30 +01:00
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1999-02-26 00:45:42 +01:00
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basic_block->global_live_at_start has an element for each basic
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block, and the element is a bit-vector with a bit for each hard or
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pseudo register. The bit is 1 if the register is live at the
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beginning of the basic block.
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1992-01-15 22:33:30 +01:00
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Two types of elements can be added to an insn's REG_NOTES.
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A REG_DEAD note is added to an insn's REG_NOTES for any register
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that meets both of two conditions: The value in the register is not
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needed in subsequent insns and the insn does not replace the value in
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the register (in the case of multi-word hard registers, the value in
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each register must be replaced by the insn to avoid a REG_DEAD note).
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In the vast majority of cases, an object in a REG_DEAD note will be
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used somewhere in the insn. The (rare) exception to this is if an
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insn uses a multi-word hard register and only some of the registers are
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needed in subsequent insns. In that case, REG_DEAD notes will be
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provided for those hard registers that are not subsequently needed.
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Partial REG_DEAD notes of this type do not occur when an insn sets
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only some of the hard registers used in such a multi-word operand;
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omitting REG_DEAD notes for objects stored in an insn is optional and
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the desire to do so does not justify the complexity of the partial
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REG_DEAD notes.
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REG_UNUSED notes are added for each register that is set by the insn
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but is unused subsequently (if every register set by the insn is unused
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and the insn does not reference memory or have some other side-effect,
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the insn is deleted instead). If only part of a multi-word hard
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register is used in a subsequent insn, REG_UNUSED notes are made for
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the parts that will not be used.
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To determine which registers are live after any insn, one can
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start from the beginning of the basic block and scan insns, noting
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which registers are set by each insn and which die there.
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** Other actions of life_analysis **
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life_analysis sets up the LOG_LINKS fields of insns because the
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information needed to do so is readily available.
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life_analysis deletes insns whose only effect is to store a value
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that is never used.
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life_analysis notices cases where a reference to a register as
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a memory address can be combined with a preceding or following
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incrementation or decrementation of the register. The separate
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instruction to increment or decrement is deleted and the address
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is changed to a POST_INC or similar rtx.
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Each time an incrementing or decrementing address is created,
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a REG_INC element is added to the insn's REG_NOTES list.
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life_analysis fills in certain vectors containing information about
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register usage: reg_n_refs, reg_n_deaths, reg_n_sets, reg_live_length,
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1998-10-12 12:06:49 +02:00
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reg_n_calls_crosses and reg_basic_block.
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life_analysis sets current_function_sp_is_unchanging if the function
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doesn't modify the stack pointer. */
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1999-02-26 00:45:42 +01:00
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/* TODO:
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Split out from life_analysis:
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- local property discovery (bb->local_live, bb->local_set)
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- global property computation
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- log links creation
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- pre/post modify transformation
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*/
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1992-01-15 22:33:30 +01:00
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#include "config.h"
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Major cutover to using system.h:
* Makefile.in (alias.o, bitmap.o, c-aux-info.o, c-common.o,
c-decl.o, c-iterate.o, c-lang.o, c-lex.o, c-pragma.o, c-typeck.o,
caller-save.o, calls.o, collect2.o, combine.o, cse.o, dbxout.o,
dwarf2out.o, dwarfout.o, emit-rtl.o, except.o, explow.o, expmed.o,
expr.o, final.o, flow.o, function.o, getpwd.o, global.o,
integrate.o, jump.o, local-alloc.o, loop.o, optabs.o, pexecute.o,
prefix.o, print-rtl.o, print-tree.o, profile.o, real.o, recog.o,
reg-stack.o, regclass.o, regmove.o, reload.o, reload1.o, reorg.o,
rtl.o, rtlanal.o, sdbout.o, stmt.o, stor-layout.o, stupid.o,
tlink.o, toplev.o, tree.o, unroll.o, varasm.o, xcoffout.o): Depend
on system.h.
* alias.c, bitmap.c, c-aux-info.c, c-common.c, c-decl.c,
c-iterate.c, c-lang.c, c-lex.c, c-pragma.c, c-typeck.c,
caller-save.c, calls.c, collect2.c, combine.c, cse.c, dbxout.c,
dwarf2out.c, dwarfout.c, emit-rtl.c, except.c, explow.c, expmed.c,
expr.c, final.c, flow.c, function.c, gcc.c, getpwd.c, global.c,
integrate.c, jump.c, local-alloc.c, loop.c, optabs.c, pexecute.c,
prefix.c, print-rtl.c, print-tree.c, profile.c, real.c, recog.c,
reg-stack.c, regclass.c, regmove.c, reload.c, reload1.c, reorg.c,
rtl.c, rtlanal.c, sched.c, sdbout.c, stmt.c, stor-layout.c,
stupid.c, tlink.c, toplev.c, tree.c, unroll.c, varasm.c,
xcoffout.c: Include system.h. Organize include ordering so
that stdarg/varargs comes before other system headers. Remove
spurious casts of functions assured of a prototype in system.h.
From-SVN: r18726
1998-03-20 15:58:42 +01:00
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#include "system.h"
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Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
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#include "tree.h"
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1992-01-15 22:33:30 +01:00
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#include "rtl.h"
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1999-09-20 12:00:03 +02:00
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#include "tm_p.h"
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1992-01-15 22:33:30 +01:00
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#include "basic-block.h"
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#include "insn-config.h"
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#include "regs.h"
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#include "hard-reg-set.h"
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#include "flags.h"
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#include "output.h"
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1999-07-31 14:46:53 +02:00
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#include "function.h"
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1996-07-23 21:58:32 +02:00
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#include "except.h"
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1998-06-20 01:37:04 +02:00
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#include "toplev.h"
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1998-10-17 22:26:29 +02:00
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#include "recog.h"
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1999-02-26 00:45:42 +01:00
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#include "insn-flags.h"
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1992-01-15 22:33:30 +01:00
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#include "obstack.h"
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1999-09-07 07:49:18 +02:00
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1992-01-15 22:33:30 +01:00
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#define obstack_chunk_alloc xmalloc
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#define obstack_chunk_free free
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1999-02-26 00:45:42 +01:00
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/* EXIT_IGNORE_STACK should be nonzero if, when returning from a function,
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the stack pointer does not matter. The value is tested only in
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functions that have frame pointers.
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No definition is equivalent to always zero. */
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#ifndef EXIT_IGNORE_STACK
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#define EXIT_IGNORE_STACK 0
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#endif
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Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
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#ifndef HAVE_epilogue
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#define HAVE_epilogue 0
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#endif
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#ifndef HAVE_prologue
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#define HAVE_prologue 0
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#endif
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1997-06-05 22:35:53 +02:00
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/* The contents of the current function definition are allocated
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in this obstack, and all are freed at the end of the function.
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For top-level functions, this is temporary_obstack.
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Separate obstacks are made for nested functions. */
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extern struct obstack *function_obstack;
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1999-02-26 00:45:42 +01:00
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/* Number of basic blocks in the current function. */
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1992-01-15 22:33:30 +01:00
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1999-02-26 00:45:42 +01:00
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int n_basic_blocks;
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1992-01-15 22:33:30 +01:00
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Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
/* Number of edges in the current function. */
|
|
|
|
|
|
|
|
|
|
int n_edges;
|
|
|
|
|
|
1999-02-26 00:45:42 +01:00
|
|
|
|
/* The basic block array. */
|
1992-01-15 22:33:30 +01:00
|
|
|
|
|
1999-02-26 00:45:42 +01:00
|
|
|
|
varray_type basic_block_info;
|
1992-01-15 22:33:30 +01:00
|
|
|
|
|
1999-02-26 00:45:42 +01:00
|
|
|
|
/* The special entry and exit blocks. */
|
1992-01-15 22:33:30 +01:00
|
|
|
|
|
1999-02-26 00:45:42 +01:00
|
|
|
|
struct basic_block_def entry_exit_blocks[2] =
|
|
|
|
|
{
|
|
|
|
|
{
|
|
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|
|
NULL, /* head */
|
|
|
|
|
NULL, /* end */
|
|
|
|
|
NULL, /* pred */
|
|
|
|
|
NULL, /* succ */
|
|
|
|
|
NULL, /* local_set */
|
|
|
|
|
NULL, /* global_live_at_start */
|
|
|
|
|
NULL, /* global_live_at_end */
|
|
|
|
|
NULL, /* aux */
|
|
|
|
|
ENTRY_BLOCK, /* index */
|
1999-09-21 23:15:37 +02:00
|
|
|
|
0, /* loop_depth */
|
|
|
|
|
-1, -1 /* eh_beg, eh_end */
|
1999-02-26 00:45:42 +01:00
|
|
|
|
},
|
|
|
|
|
{
|
|
|
|
|
NULL, /* head */
|
|
|
|
|
NULL, /* end */
|
|
|
|
|
NULL, /* pred */
|
|
|
|
|
NULL, /* succ */
|
|
|
|
|
NULL, /* local_set */
|
|
|
|
|
NULL, /* global_live_at_start */
|
|
|
|
|
NULL, /* global_live_at_end */
|
|
|
|
|
NULL, /* aux */
|
|
|
|
|
EXIT_BLOCK, /* index */
|
1999-09-21 23:15:37 +02:00
|
|
|
|
0, /* loop_depth */
|
|
|
|
|
-1, -1 /* eh_beg, eh_end */
|
1999-02-26 00:45:42 +01:00
|
|
|
|
}
|
|
|
|
|
};
|
1992-01-15 22:33:30 +01:00
|
|
|
|
|
1998-11-04 21:45:03 +01:00
|
|
|
|
/* Nonzero if the second flow pass has completed. */
|
|
|
|
|
int flow2_completed;
|
|
|
|
|
|
1992-01-15 22:33:30 +01:00
|
|
|
|
/* Maximum register number used in this function, plus one. */
|
|
|
|
|
|
|
|
|
|
int max_regno;
|
|
|
|
|
|
1997-05-30 20:19:19 +02:00
|
|
|
|
/* Indexed by n, giving various register information */
|
1992-01-15 22:33:30 +01:00
|
|
|
|
|
1998-07-02 15:49:34 +02:00
|
|
|
|
varray_type reg_n_info;
|
1992-01-15 22:33:30 +01:00
|
|
|
|
|
1998-05-13 13:57:25 +02:00
|
|
|
|
/* Size of the reg_n_info table. */
|
|
|
|
|
|
|
|
|
|
unsigned int reg_n_max;
|
|
|
|
|
|
1992-01-15 22:33:30 +01:00
|
|
|
|
/* Element N is the next insn that uses (hard or pseudo) register number N
|
|
|
|
|
within the current basic block; or zero, if there is no such insn.
|
|
|
|
|
This is valid only during the final backward scan in propagate_block. */
|
|
|
|
|
|
|
|
|
|
static rtx *reg_next_use;
|
|
|
|
|
|
|
|
|
|
/* Size of a regset for the current function,
|
|
|
|
|
in (1) bytes and (2) elements. */
|
|
|
|
|
|
|
|
|
|
int regset_bytes;
|
|
|
|
|
int regset_size;
|
|
|
|
|
|
|
|
|
|
/* Regset of regs live when calls to `setjmp'-like functions happen. */
|
1999-02-26 00:45:42 +01:00
|
|
|
|
/* ??? Does this exist only for the setjmp-clobbered warning message? */
|
1992-01-15 22:33:30 +01:00
|
|
|
|
|
|
|
|
|
regset regs_live_at_setjmp;
|
|
|
|
|
|
|
|
|
|
/* List made of EXPR_LIST rtx's which gives pairs of pseudo registers
|
|
|
|
|
that have to go in the same hard reg.
|
|
|
|
|
The first two regs in the list are a pair, and the next two
|
|
|
|
|
are another pair, etc. */
|
|
|
|
|
rtx regs_may_share;
|
|
|
|
|
|
|
|
|
|
/* Depth within loops of basic block being scanned for lifetime analysis,
|
|
|
|
|
plus one. This is the weight attached to references to registers. */
|
|
|
|
|
|
|
|
|
|
static int loop_depth;
|
|
|
|
|
|
|
|
|
|
/* During propagate_block, this is non-zero if the value of CC0 is live. */
|
|
|
|
|
|
|
|
|
|
static int cc0_live;
|
|
|
|
|
|
1999-01-18 04:01:26 +01:00
|
|
|
|
/* During propagate_block, this contains a list of all the MEMs we are
|
1999-10-15 01:31:25 +02:00
|
|
|
|
tracking for dead store elimination. */
|
1992-01-15 22:33:30 +01:00
|
|
|
|
|
1999-01-18 04:01:26 +01:00
|
|
|
|
static rtx mem_set_list;
|
1992-01-15 22:33:30 +01:00
|
|
|
|
|
|
|
|
|
/* Set of registers that may be eliminable. These are handled specially
|
|
|
|
|
in updating regs_ever_live. */
|
|
|
|
|
|
|
|
|
|
static HARD_REG_SET elim_reg_set;
|
|
|
|
|
|
1999-02-26 00:45:42 +01:00
|
|
|
|
/* The basic block structure for every insn, indexed by uid. */
|
|
|
|
|
|
|
|
|
|
varray_type basic_block_for_insn;
|
|
|
|
|
|
|
|
|
|
/* The labels mentioned in non-jump rtl. Valid during find_basic_blocks. */
|
|
|
|
|
/* ??? Should probably be using LABEL_NUSES instead. It would take a
|
|
|
|
|
bit of surgery to be able to use or co-opt the routines in jump. */
|
|
|
|
|
|
|
|
|
|
static rtx label_value_list;
|
|
|
|
|
|
|
|
|
|
/* INSN_VOLATILE (insn) is 1 if the insn refers to anything volatile. */
|
|
|
|
|
|
|
|
|
|
#define INSN_VOLATILE(INSN) bitmap_bit_p (uid_volatile, INSN_UID (INSN))
|
|
|
|
|
#define SET_INSN_VOLATILE(INSN) bitmap_set_bit (uid_volatile, INSN_UID (INSN))
|
|
|
|
|
static bitmap uid_volatile;
|
|
|
|
|
|
1992-01-15 22:33:30 +01:00
|
|
|
|
/* Forward declarations */
|
1999-02-26 00:45:42 +01:00
|
|
|
|
static int count_basic_blocks PROTO((rtx));
|
1999-09-21 23:15:37 +02:00
|
|
|
|
static rtx find_basic_blocks_1 PROTO((rtx));
|
1999-02-26 00:45:42 +01:00
|
|
|
|
static void create_basic_block PROTO((int, rtx, rtx, rtx));
|
|
|
|
|
static void clear_edges PROTO((void));
|
1999-09-21 23:15:37 +02:00
|
|
|
|
static void make_edges PROTO((rtx));
|
1999-10-05 21:01:01 +02:00
|
|
|
|
static void make_edge PROTO((sbitmap *, basic_block,
|
|
|
|
|
basic_block, int));
|
|
|
|
|
static void make_label_edge PROTO((sbitmap *, basic_block,
|
1999-09-21 23:15:37 +02:00
|
|
|
|
rtx, int));
|
1999-10-05 21:01:01 +02:00
|
|
|
|
static void make_eh_edge PROTO((sbitmap *, eh_nesting_info *,
|
|
|
|
|
basic_block, rtx, int));
|
1999-02-26 00:45:42 +01:00
|
|
|
|
static void mark_critical_edges PROTO((void));
|
1999-09-21 23:15:37 +02:00
|
|
|
|
static void move_stray_eh_region_notes PROTO((void));
|
|
|
|
|
static void record_active_eh_regions PROTO((rtx));
|
1999-02-26 00:45:42 +01:00
|
|
|
|
|
|
|
|
|
static void commit_one_edge_insertion PROTO((edge));
|
|
|
|
|
|
1998-10-30 00:18:51 +01:00
|
|
|
|
static void delete_unreachable_blocks PROTO((void));
|
1999-02-26 00:45:42 +01:00
|
|
|
|
static void delete_eh_regions PROTO((void));
|
1999-04-06 17:45:55 +02:00
|
|
|
|
static int can_delete_note_p PROTO((rtx));
|
1999-02-26 00:45:42 +01:00
|
|
|
|
static int delete_block PROTO((basic_block));
|
|
|
|
|
static void expunge_block PROTO((basic_block));
|
|
|
|
|
static rtx flow_delete_insn PROTO((rtx));
|
|
|
|
|
static int can_delete_label_p PROTO((rtx));
|
1999-09-21 23:15:37 +02:00
|
|
|
|
static int merge_blocks_move_predecessor_nojumps PROTO((basic_block,
|
|
|
|
|
basic_block));
|
|
|
|
|
static int merge_blocks_move_successor_nojumps PROTO((basic_block,
|
|
|
|
|
basic_block));
|
1999-02-26 00:45:42 +01:00
|
|
|
|
static void merge_blocks_nomove PROTO((basic_block, basic_block));
|
|
|
|
|
static int merge_blocks PROTO((edge,basic_block,basic_block));
|
1999-09-21 23:15:37 +02:00
|
|
|
|
static void try_merge_blocks PROTO((void));
|
1999-02-26 00:45:42 +01:00
|
|
|
|
static void tidy_fallthru_edge PROTO((edge,basic_block,basic_block));
|
|
|
|
|
static void calculate_loop_depth PROTO((rtx));
|
|
|
|
|
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
static int verify_wide_reg_1 PROTO((rtx *, void *));
|
|
|
|
|
static void verify_wide_reg PROTO((int, rtx, rtx));
|
|
|
|
|
static void verify_local_live_at_start PROTO((regset, basic_block));
|
flow.c (life_analysis_1): Break out some functions.
Fri Oct 9 15:57:51 1998 Bernd Schmidt <crux@Pool.Informatik.RWTH-Aachen.DE>
* flow.c (life_analysis_1): Break out some functions.
(find_basic_blocks_1): Likewise. Also move some variables out and
make them static.
Rename NONLOCAL_LABEL_LIST arg to NONLOCAL_LABELS and initialize
new static var nonlocal_label_list with it.
(active_eh_region, nested_eh_region, label_value_list,
nonlocal_label_list): New static variables.
(make_edges, delete_unreachable_blocks, delete_block): New static
functions, broken out of find_basic_blocks_1.
(record_volatile_insns, mark_regs_live_at_end, set_noop_p,
noop_move_p): New static functions, broken out of life_analysis_1.
From-SVN: r22963
1998-10-09 17:58:37 +02:00
|
|
|
|
static int set_noop_p PROTO((rtx));
|
|
|
|
|
static int noop_move_p PROTO((rtx));
|
1999-10-27 21:27:41 +02:00
|
|
|
|
static void notice_stack_pointer_modification PROTO ((rtx, rtx, void *));
|
flow.c (life_analysis_1): Break out some functions.
Fri Oct 9 15:57:51 1998 Bernd Schmidt <crux@Pool.Informatik.RWTH-Aachen.DE>
* flow.c (life_analysis_1): Break out some functions.
(find_basic_blocks_1): Likewise. Also move some variables out and
make them static.
Rename NONLOCAL_LABEL_LIST arg to NONLOCAL_LABELS and initialize
new static var nonlocal_label_list with it.
(active_eh_region, nested_eh_region, label_value_list,
nonlocal_label_list): New static variables.
(make_edges, delete_unreachable_blocks, delete_block): New static
functions, broken out of find_basic_blocks_1.
(record_volatile_insns, mark_regs_live_at_end, set_noop_p,
noop_move_p): New static functions, broken out of life_analysis_1.
From-SVN: r22963
1998-10-09 17:58:37 +02:00
|
|
|
|
static void record_volatile_insns PROTO((rtx));
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
static void mark_reg PROTO((regset, rtx));
|
flow.c (life_analysis_1): Break out some functions.
Fri Oct 9 15:57:51 1998 Bernd Schmidt <crux@Pool.Informatik.RWTH-Aachen.DE>
* flow.c (life_analysis_1): Break out some functions.
(find_basic_blocks_1): Likewise. Also move some variables out and
make them static.
Rename NONLOCAL_LABEL_LIST arg to NONLOCAL_LABELS and initialize
new static var nonlocal_label_list with it.
(active_eh_region, nested_eh_region, label_value_list,
nonlocal_label_list): New static variables.
(make_edges, delete_unreachable_blocks, delete_block): New static
functions, broken out of find_basic_blocks_1.
(record_volatile_insns, mark_regs_live_at_end, set_noop_p,
noop_move_p): New static functions, broken out of life_analysis_1.
From-SVN: r22963
1998-10-09 17:58:37 +02:00
|
|
|
|
static void mark_regs_live_at_end PROTO((regset));
|
1999-04-11 00:53:08 +02:00
|
|
|
|
static void life_analysis_1 PROTO((rtx, int, int));
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
static void calculate_global_regs_live PROTO((sbitmap, sbitmap, int));
|
|
|
|
|
static void propagate_block PROTO((regset, rtx, rtx,
|
1999-04-11 00:53:08 +02:00
|
|
|
|
regset, int, int));
|
1998-11-17 10:14:33 +01:00
|
|
|
|
static int insn_dead_p PROTO((rtx, regset, int, rtx));
|
1994-02-03 21:27:23 +01:00
|
|
|
|
static int libcall_dead_p PROTO((rtx, regset, rtx, rtx));
|
|
|
|
|
static void mark_set_regs PROTO((regset, regset, rtx,
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
rtx, regset, int));
|
1994-02-03 21:27:23 +01:00
|
|
|
|
static void mark_set_1 PROTO((regset, regset, rtx,
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
rtx, regset, int));
|
1997-12-20 12:31:54 +01:00
|
|
|
|
#ifdef AUTO_INC_DEC
|
1994-02-03 21:27:23 +01:00
|
|
|
|
static void find_auto_inc PROTO((regset, rtx, rtx));
|
|
|
|
|
static int try_pre_increment_1 PROTO((rtx));
|
|
|
|
|
static int try_pre_increment PROTO((rtx, rtx, HOST_WIDE_INT));
|
1997-12-20 12:31:54 +01:00
|
|
|
|
#endif
|
|
|
|
|
static void mark_used_regs PROTO((regset, regset, rtx, int, rtx));
|
1994-02-03 21:27:23 +01:00
|
|
|
|
void dump_flow_info PROTO((FILE *));
|
1999-10-29 19:51:38 +02:00
|
|
|
|
void debug_flow_info PROTO((void));
|
1999-02-26 00:45:42 +01:00
|
|
|
|
static void dump_edge_info PROTO((FILE *, edge, int));
|
|
|
|
|
|
1998-06-27 17:51:49 +02:00
|
|
|
|
static void count_reg_sets_1 PROTO ((rtx));
|
|
|
|
|
static void count_reg_sets PROTO ((rtx));
|
|
|
|
|
static void count_reg_references PROTO ((rtx));
|
1999-01-20 03:02:20 +01:00
|
|
|
|
static void invalidate_mems_from_autoinc PROTO ((rtx));
|
collect2.c (scan_prog_file, [...]): Prototype function pointers and casts for `int_handler' and `quit_handler'.
* collect2.c (scan_prog_file, scan_libraries): Prototype function
pointers and casts for `int_handler' and `quit_handler'.
* flow.c (verify_flow_info, split_hard_reg_notes,
find_insn_with_note, sets_reg_or_subreg_1, prepend_reg_notes,
remove_edge, remove_fake_successors): Add static prototypes.
(verify_flow_info): Wrap with macro ENABLE_CHECKING.
(mark_set_1): Initialize variable `regno'.
(unlink_insn_chain): Likewise for variable `curr'.
(remove_fake_edges): Remove unused variables `e', `tmp' and `last'.
* loop.c (strength_reduce): Initialize variable
`unrolled_insn_copies'.
(cmp_combine_givs_stats, cmp_recombine_givs_stats): Add static
prototypes. Change these functions to take const PTR parameters
to avoid prototype conflict when used as the comparson argument
for qsort.
(check_dbra_loop): Initialize variable `comparison_val'.
* reload.c (debug_reload_to_stream, debug_reload): Add prototypes.
(get_secondary_mem): Mark parameter `x' with ATTRIBUTE_UNUSED.
(find_valid_class): Initialize variable `best_class'.
(find_reloads): Call memcpy, not bcopy.
* reload1.c (gen_mode_int, dump_needs): Add prototypes.
(hard_reg_use_compare): Don't needlessly cast away const.
(reload_reg_class_lower): Likewise.
(choose_reload_regs): Initialize variable `regno'.
From-SVN: r29840
1999-10-06 16:48:41 +02:00
|
|
|
|
static void remove_edge PROTO ((edge));
|
|
|
|
|
static void remove_fake_successors PROTO ((basic_block));
|
1999-10-06 23:23:52 +02:00
|
|
|
|
|
|
|
|
|
/* This function is always defined so it can be called from the
|
|
|
|
|
debugger, and it is declared extern so we don't get warnings about
|
|
|
|
|
it being unused. */
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
void verify_flow_info PROTO ((void));
|
|
|
|
|
|
1992-01-15 22:33:30 +01:00
|
|
|
|
|
1998-03-05 23:31:51 +01:00
|
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|
|
/* Find basic blocks of the current function.
|
1999-02-26 00:45:42 +01:00
|
|
|
|
F is the first insn of the function and NREGS the number of register
|
|
|
|
|
numbers in use. */
|
1992-01-15 22:33:30 +01:00
|
|
|
|
|
|
|
|
|
void
|
1999-03-31 14:41:03 +02:00
|
|
|
|
find_basic_blocks (f, nregs, file, do_cleanup)
|
1992-01-15 22:33:30 +01:00
|
|
|
|
rtx f;
|
1999-02-26 00:45:42 +01:00
|
|
|
|
int nregs ATTRIBUTE_UNUSED;
|
|
|
|
|
FILE *file ATTRIBUTE_UNUSED;
|
1999-03-31 14:41:03 +02:00
|
|
|
|
int do_cleanup;
|
1992-01-15 22:33:30 +01:00
|
|
|
|
{
|
1999-02-26 00:45:42 +01:00
|
|
|
|
int max_uid;
|
1992-01-15 22:33:30 +01:00
|
|
|
|
|
1999-02-26 00:45:42 +01:00
|
|
|
|
/* Flush out existing data. */
|
|
|
|
|
if (basic_block_info != NULL)
|
|
|
|
|
{
|
|
|
|
|
int i;
|
1998-10-30 00:18:51 +01:00
|
|
|
|
|
1999-02-26 00:45:42 +01:00
|
|
|
|
clear_edges ();
|
1992-01-15 22:33:30 +01:00
|
|
|
|
|
1999-02-26 00:45:42 +01:00
|
|
|
|
/* Clear bb->aux on all extant basic blocks. We'll use this as a
|
|
|
|
|
tag for reuse during create_basic_block, just in case some pass
|
|
|
|
|
copies around basic block notes improperly. */
|
|
|
|
|
for (i = 0; i < n_basic_blocks; ++i)
|
|
|
|
|
BASIC_BLOCK (i)->aux = NULL;
|
1992-01-15 22:33:30 +01:00
|
|
|
|
|
1999-02-26 00:45:42 +01:00
|
|
|
|
VARRAY_FREE (basic_block_info);
|
|
|
|
|
}
|
1998-10-14 00:19:54 +02:00
|
|
|
|
|
1999-02-26 00:45:42 +01:00
|
|
|
|
n_basic_blocks = count_basic_blocks (f);
|
1998-10-14 00:19:54 +02:00
|
|
|
|
|
1999-02-26 00:45:42 +01:00
|
|
|
|
/* Size the basic block table. The actual structures will be allocated
|
|
|
|
|
by find_basic_blocks_1, since we want to keep the structure pointers
|
|
|
|
|
stable across calls to find_basic_blocks. */
|
|
|
|
|
/* ??? This whole issue would be much simpler if we called find_basic_blocks
|
|
|
|
|
exactly once, and thereafter we don't have a single long chain of
|
|
|
|
|
instructions at all until close to the end of compilation when we
|
|
|
|
|
actually lay them out. */
|
1996-06-10 20:14:11 +02:00
|
|
|
|
|
1999-02-26 00:45:42 +01:00
|
|
|
|
VARRAY_BB_INIT (basic_block_info, n_basic_blocks, "basic_block_info");
|
|
|
|
|
|
1999-09-21 23:15:37 +02:00
|
|
|
|
label_value_list = find_basic_blocks_1 (f);
|
1999-03-21 13:14:09 +01:00
|
|
|
|
|
1999-02-26 00:45:42 +01:00
|
|
|
|
/* Record the block to which an insn belongs. */
|
|
|
|
|
/* ??? This should be done another way, by which (perhaps) a label is
|
|
|
|
|
tagged directly with the basic block that it starts. It is used for
|
|
|
|
|
more than that currently, but IMO that is the only valid use. */
|
|
|
|
|
|
|
|
|
|
max_uid = get_max_uid ();
|
1992-01-15 22:33:30 +01:00
|
|
|
|
#ifdef AUTO_INC_DEC
|
1998-03-05 23:31:51 +01:00
|
|
|
|
/* Leave space for insns life_analysis makes in some cases for auto-inc.
|
|
|
|
|
These cases are rare, so we don't need too much space. */
|
1999-02-26 00:45:42 +01:00
|
|
|
|
max_uid += max_uid / 10;
|
1992-01-15 22:33:30 +01:00
|
|
|
|
#endif
|
|
|
|
|
|
1999-09-20 22:11:36 +02:00
|
|
|
|
compute_bb_for_insn (max_uid);
|
1999-02-26 00:45:42 +01:00
|
|
|
|
|
|
|
|
|
/* Discover the edges of our cfg. */
|
1992-01-15 22:33:30 +01:00
|
|
|
|
|
1999-09-21 23:15:37 +02:00
|
|
|
|
record_active_eh_regions (f);
|
|
|
|
|
make_edges (label_value_list);
|
1998-10-30 00:18:51 +01:00
|
|
|
|
|
1999-09-21 23:15:37 +02:00
|
|
|
|
/* Delete unreachable blocks, then merge blocks when possible. */
|
1992-01-15 22:33:30 +01:00
|
|
|
|
|
1999-03-31 14:41:03 +02:00
|
|
|
|
if (do_cleanup)
|
1999-09-21 23:15:37 +02:00
|
|
|
|
{
|
|
|
|
|
delete_unreachable_blocks ();
|
|
|
|
|
move_stray_eh_region_notes ();
|
|
|
|
|
record_active_eh_regions (f);
|
|
|
|
|
try_merge_blocks ();
|
|
|
|
|
}
|
1999-02-26 00:45:42 +01:00
|
|
|
|
|
|
|
|
|
/* Mark critical edges. */
|
|
|
|
|
|
|
|
|
|
mark_critical_edges ();
|
|
|
|
|
|
|
|
|
|
/* Discover the loop depth at the start of each basic block to aid
|
|
|
|
|
register allocation. */
|
|
|
|
|
calculate_loop_depth (f);
|
|
|
|
|
|
|
|
|
|
/* Kill the data we won't maintain. */
|
1999-10-05 05:44:26 +02:00
|
|
|
|
label_value_list = NULL_RTX;
|
1999-04-07 00:10:53 +02:00
|
|
|
|
|
|
|
|
|
#ifdef ENABLE_CHECKING
|
|
|
|
|
verify_flow_info ();
|
|
|
|
|
#endif
|
1992-01-15 22:33:30 +01:00
|
|
|
|
}
|
1998-03-05 23:31:51 +01:00
|
|
|
|
|
1999-02-26 00:45:42 +01:00
|
|
|
|
/* Count the basic blocks of the function. */
|
flow.c (life_analysis_1): Break out some functions.
Fri Oct 9 15:57:51 1998 Bernd Schmidt <crux@Pool.Informatik.RWTH-Aachen.DE>
* flow.c (life_analysis_1): Break out some functions.
(find_basic_blocks_1): Likewise. Also move some variables out and
make them static.
Rename NONLOCAL_LABEL_LIST arg to NONLOCAL_LABELS and initialize
new static var nonlocal_label_list with it.
(active_eh_region, nested_eh_region, label_value_list,
nonlocal_label_list): New static variables.
(make_edges, delete_unreachable_blocks, delete_block): New static
functions, broken out of find_basic_blocks_1.
(record_volatile_insns, mark_regs_live_at_end, set_noop_p,
noop_move_p): New static functions, broken out of life_analysis_1.
From-SVN: r22963
1998-10-09 17:58:37 +02:00
|
|
|
|
|
1999-02-26 00:45:42 +01:00
|
|
|
|
static int
|
|
|
|
|
count_basic_blocks (f)
|
|
|
|
|
rtx f;
|
|
|
|
|
{
|
|
|
|
|
register rtx insn;
|
|
|
|
|
register RTX_CODE prev_code;
|
|
|
|
|
register int count = 0;
|
|
|
|
|
int eh_region = 0;
|
|
|
|
|
int call_had_abnormal_edge = 0;
|
|
|
|
|
rtx prev_call = NULL_RTX;
|
flow.c (life_analysis_1): Break out some functions.
Fri Oct 9 15:57:51 1998 Bernd Schmidt <crux@Pool.Informatik.RWTH-Aachen.DE>
* flow.c (life_analysis_1): Break out some functions.
(find_basic_blocks_1): Likewise. Also move some variables out and
make them static.
Rename NONLOCAL_LABEL_LIST arg to NONLOCAL_LABELS and initialize
new static var nonlocal_label_list with it.
(active_eh_region, nested_eh_region, label_value_list,
nonlocal_label_list): New static variables.
(make_edges, delete_unreachable_blocks, delete_block): New static
functions, broken out of find_basic_blocks_1.
(record_volatile_insns, mark_regs_live_at_end, set_noop_p,
noop_move_p): New static functions, broken out of life_analysis_1.
From-SVN: r22963
1998-10-09 17:58:37 +02:00
|
|
|
|
|
1999-02-26 00:45:42 +01:00
|
|
|
|
prev_code = JUMP_INSN;
|
|
|
|
|
for (insn = f; insn; insn = NEXT_INSN (insn))
|
|
|
|
|
{
|
|
|
|
|
register RTX_CODE code = GET_CODE (insn);
|
|
|
|
|
|
|
|
|
|
if (code == CODE_LABEL
|
|
|
|
|
|| (GET_RTX_CLASS (code) == 'i'
|
|
|
|
|
&& (prev_code == JUMP_INSN
|
|
|
|
|
|| prev_code == BARRIER
|
|
|
|
|
|| (prev_code == CALL_INSN && call_had_abnormal_edge))))
|
|
|
|
|
{
|
|
|
|
|
count++;
|
flow.c (life_analysis_1): Break out some functions.
Fri Oct 9 15:57:51 1998 Bernd Schmidt <crux@Pool.Informatik.RWTH-Aachen.DE>
* flow.c (life_analysis_1): Break out some functions.
(find_basic_blocks_1): Likewise. Also move some variables out and
make them static.
Rename NONLOCAL_LABEL_LIST arg to NONLOCAL_LABELS and initialize
new static var nonlocal_label_list with it.
(active_eh_region, nested_eh_region, label_value_list,
nonlocal_label_list): New static variables.
(make_edges, delete_unreachable_blocks, delete_block): New static
functions, broken out of find_basic_blocks_1.
(record_volatile_insns, mark_regs_live_at_end, set_noop_p,
noop_move_p): New static functions, broken out of life_analysis_1.
From-SVN: r22963
1998-10-09 17:58:37 +02:00
|
|
|
|
|
1999-02-26 00:45:42 +01:00
|
|
|
|
/* If the previous insn was a call that did not create an
|
|
|
|
|
abnormal edge, we want to add a nop so that the CALL_INSN
|
|
|
|
|
itself is not at basic_block_end. This allows us to
|
|
|
|
|
easily distinguish between normal calls and those which
|
|
|
|
|
create abnormal edges in the flow graph. */
|
flow.c (life_analysis_1): Break out some functions.
Fri Oct 9 15:57:51 1998 Bernd Schmidt <crux@Pool.Informatik.RWTH-Aachen.DE>
* flow.c (life_analysis_1): Break out some functions.
(find_basic_blocks_1): Likewise. Also move some variables out and
make them static.
Rename NONLOCAL_LABEL_LIST arg to NONLOCAL_LABELS and initialize
new static var nonlocal_label_list with it.
(active_eh_region, nested_eh_region, label_value_list,
nonlocal_label_list): New static variables.
(make_edges, delete_unreachable_blocks, delete_block): New static
functions, broken out of find_basic_blocks_1.
(record_volatile_insns, mark_regs_live_at_end, set_noop_p,
noop_move_p): New static functions, broken out of life_analysis_1.
From-SVN: r22963
1998-10-09 17:58:37 +02:00
|
|
|
|
|
1999-02-26 00:45:42 +01:00
|
|
|
|
if (count > 0 && prev_call != 0 && !call_had_abnormal_edge)
|
|
|
|
|
{
|
|
|
|
|
rtx nop = gen_rtx_USE (VOIDmode, const0_rtx);
|
|
|
|
|
emit_insn_after (nop, prev_call);
|
|
|
|
|
}
|
|
|
|
|
}
|
flow.c (life_analysis_1): Break out some functions.
Fri Oct 9 15:57:51 1998 Bernd Schmidt <crux@Pool.Informatik.RWTH-Aachen.DE>
* flow.c (life_analysis_1): Break out some functions.
(find_basic_blocks_1): Likewise. Also move some variables out and
make them static.
Rename NONLOCAL_LABEL_LIST arg to NONLOCAL_LABELS and initialize
new static var nonlocal_label_list with it.
(active_eh_region, nested_eh_region, label_value_list,
nonlocal_label_list): New static variables.
(make_edges, delete_unreachable_blocks, delete_block): New static
functions, broken out of find_basic_blocks_1.
(record_volatile_insns, mark_regs_live_at_end, set_noop_p,
noop_move_p): New static functions, broken out of life_analysis_1.
From-SVN: r22963
1998-10-09 17:58:37 +02:00
|
|
|
|
|
1999-02-26 00:45:42 +01:00
|
|
|
|
/* Record whether this call created an edge. */
|
|
|
|
|
if (code == CALL_INSN)
|
|
|
|
|
{
|
1999-04-27 19:08:37 +02:00
|
|
|
|
rtx note = find_reg_note (insn, REG_EH_REGION, NULL_RTX);
|
rtl.h (RTL_CHECK1, RTL_CHECK2): New macros which type- and bounds- check RTL accesses if --enable-checking.
1999-08-31 12:20 -0700 Zack Weinberg <zack@bitmover.com>
* rtl.h (RTL_CHECK1, RTL_CHECK2): New macros which type- and
bounds- check RTL accesses if --enable-checking.
(RTVEC_ELT): Bounds check if --enable-checking.
(XWINT, XINT, XSTR, XEXP, XVEC, XMODE, XBITMAP, XTREE,
XBBDEF): Use RTL_CHECK1/RTL_CHECK2 as appropriate.
(XVECEXP, XVECLEN): Define in terms of XVEC, RTVEC_ELT, and
GET_NUM_ELEM.
(X0WINT, X0INT, X0STR, X0EXP, X0VEC, X0MODE, X0BITMAP, X0TREE,
X0BBDEF, X0ADVFLAGS): New macros for accessing '0' slots of RTXes.
(ADDR_DIFF_VEC_FLAGS): Use X0ADVFLAGS.
(NOTE_SOURCE_FILE): Use X0STR.
(NOTE_BLOCK_NUMBER, NOTE_EH_HANDLER, LABEL_NUSES,
MEM_ALIAS_SET): Use X0INT.
(NOTE_RANGE_INFO, NOTE_LIVE_INFO, NOTE_BASIC_BLOCK,
JUMP_LABEL, LABEL_REFS, LABEL_NEXTREF, CONTAINING_INSN):
Use X0EXP.
* real.h (CONST_DOUBLE_CHAIN): Use X0EXP.
* rtl.c (copy_rtx, copy_most_rtx): Copy '0' slots with X0WINT.
(rtl_check_failed_bounds, rtl_check_failed_type1,
rtl_check_failed_type2, rtvec_check_failed_bounds): New
functions.
(fancy_abort): Fix comment.
* cse.c (canon_hash): Read CONST_DOUBLE data slots with XWINT.
(cse_insn): Decrement LABEL_NUSES for jump target before
deleting jump insn.
* emit-rtl.c (gen_rtx_CONST_DOUBLE): Use X0EXP for slot 1.
* final.c (alter_subreg): Compute regno before changing x to
REG; set REGNO(x) after changing it.
* flow.c (count_basic_blocks): Use XWINT to inspect EH_REGION
notes containing CONST_INTs.
(delete_eh_regions): Use NOTE_EH_HANDLER.
* function.c (put_reg_into_stack): Make reg a MEM before
initializing it.
(fixup_var_refs_insns): Save REG_NOTES (insn) in case we
delete insn.
(gen_mem_addressof): Make reg a MEM before initializing it.
* integrate.c (copy_rtx_and_substitute): Copy '0' slots with
X0WINT.
* local-alloc.c (update_equiv_regs): Zap REG_NOTES before
deleting an insn, not after.
(block_alloc): Only look at PATTERN(insn) if we have to, and
only if it's format class 'i'.
* loop.c (check_dbra_loop): Check bl->biv->add_val is a
CONST_INT before using its INTVAL.
* print-rtl.c (print_rtx): Use X0STR.
* regmove.c (fixup_match_1): Don't look at PATTERN of
non-class-'i' insn chain elements.
* reload.c (loc_mentioned_in_p): Take address of
in->fld[1].rtx directly.
* reload1.c (reload): Change reg to a MEM before initializing
it.
* varasm.c (mark_constant_pool): Skip CONST_DOUBLES, which
have no names.
* config/i386/i386.md (decrement_and_branch_if_zero): Fix typo.
From-SVN: r29008
1999-08-31 21:39:10 +02:00
|
|
|
|
int region = (note ? XWINT (XEXP (note, 0), 0) : 1);
|
1999-02-26 00:45:42 +01:00
|
|
|
|
prev_call = insn;
|
|
|
|
|
call_had_abnormal_edge = 0;
|
1999-04-27 19:08:37 +02:00
|
|
|
|
|
|
|
|
|
/* If there is a specified EH region, we have an edge. */
|
|
|
|
|
if (eh_region && region > 0)
|
|
|
|
|
call_had_abnormal_edge = 1;
|
|
|
|
|
else
|
1999-02-26 00:45:42 +01:00
|
|
|
|
{
|
1999-04-27 19:08:37 +02:00
|
|
|
|
/* If there is a nonlocal goto label and the specified
|
|
|
|
|
region number isn't -1, we have an edge. (0 means
|
|
|
|
|
no throw, but might have a nonlocal goto). */
|
|
|
|
|
if (nonlocal_goto_handler_labels && region >= 0)
|
1999-02-26 00:45:42 +01:00
|
|
|
|
call_had_abnormal_edge = 1;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
else if (code != NOTE)
|
|
|
|
|
prev_call = NULL_RTX;
|
|
|
|
|
|
|
|
|
|
if (code != NOTE)
|
|
|
|
|
prev_code = code;
|
|
|
|
|
else if (NOTE_LINE_NUMBER (insn) == NOTE_INSN_EH_REGION_BEG)
|
|
|
|
|
++eh_region;
|
|
|
|
|
else if (NOTE_LINE_NUMBER (insn) == NOTE_INSN_EH_REGION_END)
|
|
|
|
|
--eh_region;
|
|
|
|
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* The rest of the compiler works a bit smoother when we don't have to
|
|
|
|
|
check for the edge case of do-nothing functions with no basic blocks. */
|
|
|
|
|
if (count == 0)
|
|
|
|
|
{
|
|
|
|
|
emit_insn (gen_rtx_USE (VOIDmode, const0_rtx));
|
|
|
|
|
count = 1;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
return count;
|
|
|
|
|
}
|
flow.c (life_analysis_1): Break out some functions.
Fri Oct 9 15:57:51 1998 Bernd Schmidt <crux@Pool.Informatik.RWTH-Aachen.DE>
* flow.c (life_analysis_1): Break out some functions.
(find_basic_blocks_1): Likewise. Also move some variables out and
make them static.
Rename NONLOCAL_LABEL_LIST arg to NONLOCAL_LABELS and initialize
new static var nonlocal_label_list with it.
(active_eh_region, nested_eh_region, label_value_list,
nonlocal_label_list): New static variables.
(make_edges, delete_unreachable_blocks, delete_block): New static
functions, broken out of find_basic_blocks_1.
(record_volatile_insns, mark_regs_live_at_end, set_noop_p,
noop_move_p): New static functions, broken out of life_analysis_1.
From-SVN: r22963
1998-10-09 17:58:37 +02:00
|
|
|
|
|
1992-01-15 22:33:30 +01:00
|
|
|
|
/* Find all basic blocks of the function whose first insn is F.
|
|
|
|
|
|
1999-09-21 23:15:37 +02:00
|
|
|
|
Collect and return a list of labels whose addresses are taken. This
|
|
|
|
|
will be used in make_edges for use with computed gotos. */
|
1994-11-15 16:38:07 +01:00
|
|
|
|
|
1999-02-26 00:45:42 +01:00
|
|
|
|
static rtx
|
1999-09-21 23:15:37 +02:00
|
|
|
|
find_basic_blocks_1 (f)
|
1999-02-26 00:45:42 +01:00
|
|
|
|
rtx f;
|
|
|
|
|
{
|
|
|
|
|
register rtx insn, next;
|
|
|
|
|
int call_has_abnormal_edge = 0;
|
|
|
|
|
int i = 0;
|
|
|
|
|
rtx bb_note = NULL_RTX;
|
|
|
|
|
rtx eh_list = NULL_RTX;
|
|
|
|
|
rtx label_value_list = NULL_RTX;
|
|
|
|
|
rtx head = NULL_RTX;
|
|
|
|
|
rtx end = NULL_RTX;
|
|
|
|
|
|
|
|
|
|
/* We process the instructions in a slightly different way than we did
|
|
|
|
|
previously. This is so that we see a NOTE_BASIC_BLOCK after we have
|
|
|
|
|
closed out the previous block, so that it gets attached at the proper
|
|
|
|
|
place. Since this form should be equivalent to the previous,
|
1999-09-21 23:15:37 +02:00
|
|
|
|
count_basic_blocks continues to use the old form as a check. */
|
1992-01-15 22:33:30 +01:00
|
|
|
|
|
1999-02-26 00:45:42 +01:00
|
|
|
|
for (insn = f; insn; insn = next)
|
|
|
|
|
{
|
|
|
|
|
enum rtx_code code = GET_CODE (insn);
|
1992-01-15 22:33:30 +01:00
|
|
|
|
|
1999-02-26 00:45:42 +01:00
|
|
|
|
next = NEXT_INSN (insn);
|
1992-01-15 22:33:30 +01:00
|
|
|
|
|
1999-02-26 00:45:42 +01:00
|
|
|
|
if (code == CALL_INSN)
|
1994-02-03 21:27:23 +01:00
|
|
|
|
{
|
1999-02-26 00:45:42 +01:00
|
|
|
|
/* Record whether this call created an edge. */
|
1999-04-27 19:08:37 +02:00
|
|
|
|
rtx note = find_reg_note (insn, REG_EH_REGION, NULL_RTX);
|
rtl.h (RTL_CHECK1, RTL_CHECK2): New macros which type- and bounds- check RTL accesses if --enable-checking.
1999-08-31 12:20 -0700 Zack Weinberg <zack@bitmover.com>
* rtl.h (RTL_CHECK1, RTL_CHECK2): New macros which type- and
bounds- check RTL accesses if --enable-checking.
(RTVEC_ELT): Bounds check if --enable-checking.
(XWINT, XINT, XSTR, XEXP, XVEC, XMODE, XBITMAP, XTREE,
XBBDEF): Use RTL_CHECK1/RTL_CHECK2 as appropriate.
(XVECEXP, XVECLEN): Define in terms of XVEC, RTVEC_ELT, and
GET_NUM_ELEM.
(X0WINT, X0INT, X0STR, X0EXP, X0VEC, X0MODE, X0BITMAP, X0TREE,
X0BBDEF, X0ADVFLAGS): New macros for accessing '0' slots of RTXes.
(ADDR_DIFF_VEC_FLAGS): Use X0ADVFLAGS.
(NOTE_SOURCE_FILE): Use X0STR.
(NOTE_BLOCK_NUMBER, NOTE_EH_HANDLER, LABEL_NUSES,
MEM_ALIAS_SET): Use X0INT.
(NOTE_RANGE_INFO, NOTE_LIVE_INFO, NOTE_BASIC_BLOCK,
JUMP_LABEL, LABEL_REFS, LABEL_NEXTREF, CONTAINING_INSN):
Use X0EXP.
* real.h (CONST_DOUBLE_CHAIN): Use X0EXP.
* rtl.c (copy_rtx, copy_most_rtx): Copy '0' slots with X0WINT.
(rtl_check_failed_bounds, rtl_check_failed_type1,
rtl_check_failed_type2, rtvec_check_failed_bounds): New
functions.
(fancy_abort): Fix comment.
* cse.c (canon_hash): Read CONST_DOUBLE data slots with XWINT.
(cse_insn): Decrement LABEL_NUSES for jump target before
deleting jump insn.
* emit-rtl.c (gen_rtx_CONST_DOUBLE): Use X0EXP for slot 1.
* final.c (alter_subreg): Compute regno before changing x to
REG; set REGNO(x) after changing it.
* flow.c (count_basic_blocks): Use XWINT to inspect EH_REGION
notes containing CONST_INTs.
(delete_eh_regions): Use NOTE_EH_HANDLER.
* function.c (put_reg_into_stack): Make reg a MEM before
initializing it.
(fixup_var_refs_insns): Save REG_NOTES (insn) in case we
delete insn.
(gen_mem_addressof): Make reg a MEM before initializing it.
* integrate.c (copy_rtx_and_substitute): Copy '0' slots with
X0WINT.
* local-alloc.c (update_equiv_regs): Zap REG_NOTES before
deleting an insn, not after.
(block_alloc): Only look at PATTERN(insn) if we have to, and
only if it's format class 'i'.
* loop.c (check_dbra_loop): Check bl->biv->add_val is a
CONST_INT before using its INTVAL.
* print-rtl.c (print_rtx): Use X0STR.
* regmove.c (fixup_match_1): Don't look at PATTERN of
non-class-'i' insn chain elements.
* reload.c (loc_mentioned_in_p): Take address of
in->fld[1].rtx directly.
* reload1.c (reload): Change reg to a MEM before initializing
it.
* varasm.c (mark_constant_pool): Skip CONST_DOUBLES, which
have no names.
* config/i386/i386.md (decrement_and_branch_if_zero): Fix typo.
From-SVN: r29008
1999-08-31 21:39:10 +02:00
|
|
|
|
int region = (note ? XWINT (XEXP (note, 0), 0) : 1);
|
1999-02-26 00:45:42 +01:00
|
|
|
|
call_has_abnormal_edge = 0;
|
1999-04-27 19:08:37 +02:00
|
|
|
|
|
|
|
|
|
/* If there is an EH region, we have an edge. */
|
|
|
|
|
if (eh_list && region > 0)
|
|
|
|
|
call_has_abnormal_edge = 1;
|
|
|
|
|
else
|
1994-02-03 21:27:23 +01:00
|
|
|
|
{
|
1999-04-27 19:08:37 +02:00
|
|
|
|
/* If there is a nonlocal goto label and the specified
|
|
|
|
|
region number isn't -1, we have an edge. (0 means
|
|
|
|
|
no throw, but might have a nonlocal goto). */
|
|
|
|
|
if (nonlocal_goto_handler_labels && region >= 0)
|
1999-02-26 00:45:42 +01:00
|
|
|
|
call_has_abnormal_edge = 1;
|
1998-10-08 03:26:18 +02:00
|
|
|
|
}
|
1994-02-03 21:27:23 +01:00
|
|
|
|
}
|
1992-01-15 22:33:30 +01:00
|
|
|
|
|
1999-02-26 00:45:42 +01:00
|
|
|
|
switch (code)
|
1994-02-03 21:27:23 +01:00
|
|
|
|
{
|
1999-02-26 00:45:42 +01:00
|
|
|
|
case NOTE:
|
|
|
|
|
{
|
|
|
|
|
int kind = NOTE_LINE_NUMBER (insn);
|
|
|
|
|
|
|
|
|
|
/* Keep a LIFO list of the currently active exception notes. */
|
|
|
|
|
if (kind == NOTE_INSN_EH_REGION_BEG)
|
1999-09-21 23:15:37 +02:00
|
|
|
|
eh_list = alloc_INSN_LIST (insn, eh_list);
|
1999-02-26 00:45:42 +01:00
|
|
|
|
else if (kind == NOTE_INSN_EH_REGION_END)
|
1999-09-21 23:15:37 +02:00
|
|
|
|
{
|
|
|
|
|
rtx t = eh_list;
|
|
|
|
|
eh_list = XEXP (eh_list, 1);
|
|
|
|
|
free_INSN_LIST_node (t);
|
|
|
|
|
}
|
1999-02-26 00:45:42 +01:00
|
|
|
|
|
|
|
|
|
/* Look for basic block notes with which to keep the
|
|
|
|
|
basic_block_info pointers stable. Unthread the note now;
|
|
|
|
|
we'll put it back at the right place in create_basic_block.
|
|
|
|
|
Or not at all if we've already found a note in this block. */
|
|
|
|
|
else if (kind == NOTE_INSN_BASIC_BLOCK)
|
|
|
|
|
{
|
|
|
|
|
if (bb_note == NULL_RTX)
|
|
|
|
|
bb_note = insn;
|
|
|
|
|
next = flow_delete_insn (insn);
|
|
|
|
|
}
|
1994-02-03 21:27:23 +01:00
|
|
|
|
|
1999-02-26 00:45:42 +01:00
|
|
|
|
break;
|
|
|
|
|
}
|
1992-01-15 22:33:30 +01:00
|
|
|
|
|
1999-02-26 00:45:42 +01:00
|
|
|
|
case CODE_LABEL:
|
|
|
|
|
/* A basic block starts at a label. If we've closed one off due
|
|
|
|
|
to a barrier or some such, no need to do it again. */
|
|
|
|
|
if (head != NULL_RTX)
|
1997-11-12 17:36:43 +01:00
|
|
|
|
{
|
1999-02-26 00:45:42 +01:00
|
|
|
|
/* While we now have edge lists with which other portions of
|
|
|
|
|
the compiler might determine a call ending a basic block
|
|
|
|
|
does not imply an abnormal edge, it will be a bit before
|
|
|
|
|
everything can be updated. So continue to emit a noop at
|
|
|
|
|
the end of such a block. */
|
|
|
|
|
if (GET_CODE (end) == CALL_INSN)
|
|
|
|
|
{
|
|
|
|
|
rtx nop = gen_rtx_USE (VOIDmode, const0_rtx);
|
|
|
|
|
end = emit_insn_after (nop, end);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
create_basic_block (i++, head, end, bb_note);
|
|
|
|
|
bb_note = NULL_RTX;
|
1997-11-12 17:36:43 +01:00
|
|
|
|
}
|
1999-02-26 00:45:42 +01:00
|
|
|
|
head = end = insn;
|
|
|
|
|
break;
|
1998-09-21 15:59:47 +02:00
|
|
|
|
|
1999-02-26 00:45:42 +01:00
|
|
|
|
case JUMP_INSN:
|
|
|
|
|
/* A basic block ends at a jump. */
|
|
|
|
|
if (head == NULL_RTX)
|
|
|
|
|
head = insn;
|
|
|
|
|
else
|
|
|
|
|
{
|
|
|
|
|
/* ??? Make a special check for table jumps. The way this
|
1999-10-05 05:44:26 +02:00
|
|
|
|
happens is truly and amazingly gross. We are about to
|
1999-02-26 00:45:42 +01:00
|
|
|
|
create a basic block that contains just a code label and
|
|
|
|
|
an addr*vec jump insn. Worse, an addr_diff_vec creates
|
|
|
|
|
its own natural loop.
|
1998-10-08 03:26:18 +02:00
|
|
|
|
|
1999-02-26 00:45:42 +01:00
|
|
|
|
Prevent this bit of brain damage, pasting things together
|
|
|
|
|
correctly in make_edges.
|
1997-12-28 00:34:14 +01:00
|
|
|
|
|
1999-02-26 00:45:42 +01:00
|
|
|
|
The correct solution involves emitting the table directly
|
|
|
|
|
on the tablejump instruction as a note, or JUMP_LABEL. */
|
1994-02-03 21:27:23 +01:00
|
|
|
|
|
1999-02-26 00:45:42 +01:00
|
|
|
|
if (GET_CODE (PATTERN (insn)) == ADDR_VEC
|
|
|
|
|
|| GET_CODE (PATTERN (insn)) == ADDR_DIFF_VEC)
|
|
|
|
|
{
|
|
|
|
|
head = end = NULL;
|
|
|
|
|
n_basic_blocks--;
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
end = insn;
|
|
|
|
|
goto new_bb_inclusive;
|
1992-01-15 22:33:30 +01:00
|
|
|
|
|
1999-02-26 00:45:42 +01:00
|
|
|
|
case BARRIER:
|
|
|
|
|
/* A basic block ends at a barrier. It may be that an unconditional
|
|
|
|
|
jump already closed the basic block -- no need to do it again. */
|
|
|
|
|
if (head == NULL_RTX)
|
|
|
|
|
break;
|
1992-01-15 22:33:30 +01:00
|
|
|
|
|
1999-02-26 00:45:42 +01:00
|
|
|
|
/* While we now have edge lists with which other portions of the
|
|
|
|
|
compiler might determine a call ending a basic block does not
|
|
|
|
|
imply an abnormal edge, it will be a bit before everything can
|
|
|
|
|
be updated. So continue to emit a noop at the end of such a
|
|
|
|
|
block. */
|
|
|
|
|
if (GET_CODE (end) == CALL_INSN)
|
|
|
|
|
{
|
|
|
|
|
rtx nop = gen_rtx_USE (VOIDmode, const0_rtx);
|
|
|
|
|
end = emit_insn_after (nop, end);
|
|
|
|
|
}
|
|
|
|
|
goto new_bb_exclusive;
|
|
|
|
|
|
|
|
|
|
case CALL_INSN:
|
|
|
|
|
/* A basic block ends at a call that can either throw or
|
|
|
|
|
do a non-local goto. */
|
|
|
|
|
if (call_has_abnormal_edge)
|
|
|
|
|
{
|
|
|
|
|
new_bb_inclusive:
|
|
|
|
|
if (head == NULL_RTX)
|
|
|
|
|
head = insn;
|
|
|
|
|
end = insn;
|
|
|
|
|
|
|
|
|
|
new_bb_exclusive:
|
|
|
|
|
create_basic_block (i++, head, end, bb_note);
|
|
|
|
|
head = end = NULL_RTX;
|
|
|
|
|
bb_note = NULL_RTX;
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
/* FALLTHRU */
|
1992-01-15 22:33:30 +01:00
|
|
|
|
|
1999-02-26 00:45:42 +01:00
|
|
|
|
default:
|
|
|
|
|
if (GET_RTX_CLASS (code) == 'i')
|
|
|
|
|
{
|
|
|
|
|
if (head == NULL_RTX)
|
|
|
|
|
head = insn;
|
|
|
|
|
end = insn;
|
|
|
|
|
}
|
|
|
|
|
break;
|
|
|
|
|
}
|
1992-01-15 22:33:30 +01:00
|
|
|
|
|
1999-02-26 00:45:42 +01:00
|
|
|
|
if (GET_RTX_CLASS (code) == 'i')
|
1992-01-15 22:33:30 +01:00
|
|
|
|
{
|
1999-02-26 00:45:42 +01:00
|
|
|
|
rtx note;
|
1998-10-30 00:18:51 +01:00
|
|
|
|
|
1999-02-26 00:45:42 +01:00
|
|
|
|
/* Make a list of all labels referred to other than by jumps
|
|
|
|
|
(which just don't have the REG_LABEL notes).
|
1997-11-12 17:36:43 +01:00
|
|
|
|
|
1999-02-26 00:45:42 +01:00
|
|
|
|
Make a special exception for labels followed by an ADDR*VEC,
|
|
|
|
|
as this would be a part of the tablejump setup code.
|
1998-10-30 00:18:51 +01:00
|
|
|
|
|
1999-02-26 00:45:42 +01:00
|
|
|
|
Make a special exception for the eh_return_stub_label, which
|
|
|
|
|
we know isn't part of any otherwise visible control flow. */
|
|
|
|
|
|
|
|
|
|
for (note = REG_NOTES (insn); note; note = XEXP (note, 1))
|
|
|
|
|
if (REG_NOTE_KIND (note) == REG_LABEL)
|
|
|
|
|
{
|
|
|
|
|
rtx lab = XEXP (note, 0), next;
|
|
|
|
|
|
|
|
|
|
if (lab == eh_return_stub_label)
|
|
|
|
|
;
|
|
|
|
|
else if ((next = next_nonnote_insn (lab)) != NULL
|
|
|
|
|
&& GET_CODE (next) == JUMP_INSN
|
|
|
|
|
&& (GET_CODE (PATTERN (next)) == ADDR_VEC
|
|
|
|
|
|| GET_CODE (PATTERN (next)) == ADDR_DIFF_VEC))
|
|
|
|
|
;
|
|
|
|
|
else
|
|
|
|
|
label_value_list
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
= alloc_EXPR_LIST (0, XEXP (note, 0), label_value_list);
|
1992-01-15 22:33:30 +01:00
|
|
|
|
}
|
|
|
|
|
}
|
1999-02-26 00:45:42 +01:00
|
|
|
|
}
|
1992-01-15 22:33:30 +01:00
|
|
|
|
|
1999-02-26 00:45:42 +01:00
|
|
|
|
if (head != NULL_RTX)
|
1999-09-21 23:15:37 +02:00
|
|
|
|
create_basic_block (i++, head, end, bb_note);
|
1994-10-26 12:33:33 +01:00
|
|
|
|
|
1999-02-26 00:45:42 +01:00
|
|
|
|
if (i != n_basic_blocks)
|
|
|
|
|
abort ();
|
1994-10-26 12:33:33 +01:00
|
|
|
|
|
1999-02-26 00:45:42 +01:00
|
|
|
|
return label_value_list;
|
1992-01-15 22:33:30 +01:00
|
|
|
|
}
|
1998-03-05 23:31:51 +01:00
|
|
|
|
|
1999-02-26 00:45:42 +01:00
|
|
|
|
/* Create a new basic block consisting of the instructions between
|
|
|
|
|
HEAD and END inclusive. Reuses the note and basic block struct
|
|
|
|
|
in BB_NOTE, if any. */
|
1998-03-05 23:31:51 +01:00
|
|
|
|
|
1999-02-26 00:45:42 +01:00
|
|
|
|
static void
|
|
|
|
|
create_basic_block (index, head, end, bb_note)
|
|
|
|
|
int index;
|
|
|
|
|
rtx head, end, bb_note;
|
1998-03-05 23:31:51 +01:00
|
|
|
|
{
|
1999-02-26 00:45:42 +01:00
|
|
|
|
basic_block bb;
|
|
|
|
|
|
|
|
|
|
if (bb_note
|
1999-02-28 17:41:04 +01:00
|
|
|
|
&& ! RTX_INTEGRATED_P (bb_note)
|
1999-02-26 00:45:42 +01:00
|
|
|
|
&& (bb = NOTE_BASIC_BLOCK (bb_note)) != NULL
|
|
|
|
|
&& bb->aux == NULL)
|
1998-03-05 23:31:51 +01:00
|
|
|
|
{
|
1999-02-26 00:45:42 +01:00
|
|
|
|
/* If we found an existing note, thread it back onto the chain. */
|
|
|
|
|
|
|
|
|
|
if (GET_CODE (head) == CODE_LABEL)
|
|
|
|
|
add_insn_after (bb_note, head);
|
|
|
|
|
else
|
|
|
|
|
{
|
|
|
|
|
add_insn_before (bb_note, head);
|
|
|
|
|
head = bb_note;
|
|
|
|
|
}
|
1998-03-05 23:31:51 +01:00
|
|
|
|
}
|
1999-02-26 00:45:42 +01:00
|
|
|
|
else
|
|
|
|
|
{
|
|
|
|
|
/* Otherwise we must create a note and a basic block structure.
|
|
|
|
|
Since we allow basic block structs in rtl, give the struct
|
|
|
|
|
the same lifetime by allocating it off the function obstack
|
|
|
|
|
rather than using malloc. */
|
1994-11-15 16:38:07 +01:00
|
|
|
|
|
1999-02-26 00:45:42 +01:00
|
|
|
|
bb = (basic_block) obstack_alloc (function_obstack, sizeof (*bb));
|
|
|
|
|
memset (bb, 0, sizeof (*bb));
|
1998-10-30 00:18:51 +01:00
|
|
|
|
|
1999-02-26 00:45:42 +01:00
|
|
|
|
if (GET_CODE (head) == CODE_LABEL)
|
|
|
|
|
bb_note = emit_note_after (NOTE_INSN_BASIC_BLOCK, head);
|
|
|
|
|
else
|
|
|
|
|
{
|
|
|
|
|
bb_note = emit_note_before (NOTE_INSN_BASIC_BLOCK, head);
|
|
|
|
|
head = bb_note;
|
|
|
|
|
}
|
|
|
|
|
NOTE_BASIC_BLOCK (bb_note) = bb;
|
|
|
|
|
}
|
|
|
|
|
|
1999-04-06 17:45:55 +02:00
|
|
|
|
/* Always include the bb note in the block. */
|
|
|
|
|
if (NEXT_INSN (end) == bb_note)
|
|
|
|
|
end = bb_note;
|
|
|
|
|
|
1999-02-26 00:45:42 +01:00
|
|
|
|
bb->head = head;
|
|
|
|
|
bb->end = end;
|
|
|
|
|
bb->index = index;
|
|
|
|
|
BASIC_BLOCK (index) = bb;
|
|
|
|
|
|
|
|
|
|
/* Tag the block so that we know it has been used when considering
|
|
|
|
|
other basic block notes. */
|
|
|
|
|
bb->aux = bb;
|
1998-10-30 00:18:51 +01:00
|
|
|
|
}
|
1999-02-26 00:45:42 +01:00
|
|
|
|
|
|
|
|
|
/* Records the basic block struct in BB_FOR_INSN, for every instruction
|
|
|
|
|
indexed by INSN_UID. MAX is the size of the array. */
|
1998-10-30 00:18:51 +01:00
|
|
|
|
|
1999-09-20 22:11:36 +02:00
|
|
|
|
void
|
|
|
|
|
compute_bb_for_insn (max)
|
1999-02-26 00:45:42 +01:00
|
|
|
|
int max;
|
1998-10-30 00:18:51 +01:00
|
|
|
|
{
|
1999-02-26 00:45:42 +01:00
|
|
|
|
int i;
|
1998-10-30 00:18:51 +01:00
|
|
|
|
|
1999-10-20 16:04:12 +02:00
|
|
|
|
if (basic_block_for_insn)
|
|
|
|
|
VARRAY_FREE (basic_block_for_insn);
|
1999-09-20 22:11:36 +02:00
|
|
|
|
VARRAY_BB_INIT (basic_block_for_insn, max, "basic_block_for_insn");
|
|
|
|
|
|
1999-02-26 00:45:42 +01:00
|
|
|
|
for (i = 0; i < n_basic_blocks; ++i)
|
|
|
|
|
{
|
|
|
|
|
basic_block bb = BASIC_BLOCK (i);
|
|
|
|
|
rtx insn, end;
|
|
|
|
|
|
|
|
|
|
end = bb->end;
|
|
|
|
|
insn = bb->head;
|
|
|
|
|
while (1)
|
|
|
|
|
{
|
|
|
|
|
int uid = INSN_UID (insn);
|
|
|
|
|
if (uid < max)
|
1999-09-20 22:11:36 +02:00
|
|
|
|
VARRAY_BB (basic_block_for_insn, uid) = bb;
|
1999-02-26 00:45:42 +01:00
|
|
|
|
if (insn == end)
|
|
|
|
|
break;
|
|
|
|
|
insn = NEXT_INSN (insn);
|
|
|
|
|
}
|
|
|
|
|
}
|
1998-10-30 00:18:51 +01:00
|
|
|
|
}
|
|
|
|
|
|
1999-02-26 00:45:42 +01:00
|
|
|
|
/* Free the memory associated with the edge structures. */
|
1998-10-30 00:18:51 +01:00
|
|
|
|
|
|
|
|
|
static void
|
1999-02-26 00:45:42 +01:00
|
|
|
|
clear_edges ()
|
1998-10-30 00:18:51 +01:00
|
|
|
|
{
|
1999-02-26 00:45:42 +01:00
|
|
|
|
int i;
|
|
|
|
|
edge n, e;
|
1998-10-30 00:18:51 +01:00
|
|
|
|
|
1999-02-26 00:45:42 +01:00
|
|
|
|
for (i = 0; i < n_basic_blocks; ++i)
|
1998-10-30 00:18:51 +01:00
|
|
|
|
{
|
1999-02-26 00:45:42 +01:00
|
|
|
|
basic_block bb = BASIC_BLOCK (i);
|
1998-10-30 00:18:51 +01:00
|
|
|
|
|
1999-02-26 00:45:42 +01:00
|
|
|
|
for (e = bb->succ; e ; e = n)
|
1998-10-30 00:18:51 +01:00
|
|
|
|
{
|
1999-02-26 00:45:42 +01:00
|
|
|
|
n = e->succ_next;
|
|
|
|
|
free (e);
|
1998-10-30 00:18:51 +01:00
|
|
|
|
}
|
1999-02-26 00:45:42 +01:00
|
|
|
|
|
|
|
|
|
bb->succ = 0;
|
|
|
|
|
bb->pred = 0;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
for (e = ENTRY_BLOCK_PTR->succ; e ; e = n)
|
|
|
|
|
{
|
|
|
|
|
n = e->succ_next;
|
|
|
|
|
free (e);
|
1998-10-30 00:18:51 +01:00
|
|
|
|
}
|
1999-02-26 00:45:42 +01:00
|
|
|
|
|
|
|
|
|
ENTRY_BLOCK_PTR->succ = 0;
|
|
|
|
|
EXIT_BLOCK_PTR->pred = 0;
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
|
|
|
|
|
n_edges = 0;
|
1998-10-30 00:18:51 +01:00
|
|
|
|
}
|
|
|
|
|
|
1999-02-26 00:45:42 +01:00
|
|
|
|
/* Identify the edges between basic blocks.
|
|
|
|
|
|
|
|
|
|
NONLOCAL_LABEL_LIST is a list of non-local labels in the function. Blocks
|
|
|
|
|
that are otherwise unreachable may be reachable with a non-local goto.
|
|
|
|
|
|
|
|
|
|
BB_EH_END is an array indexed by basic block number in which we record
|
|
|
|
|
the list of exception regions active at the end of the basic block. */
|
|
|
|
|
|
flow.c (life_analysis_1): Break out some functions.
Fri Oct 9 15:57:51 1998 Bernd Schmidt <crux@Pool.Informatik.RWTH-Aachen.DE>
* flow.c (life_analysis_1): Break out some functions.
(find_basic_blocks_1): Likewise. Also move some variables out and
make them static.
Rename NONLOCAL_LABEL_LIST arg to NONLOCAL_LABELS and initialize
new static var nonlocal_label_list with it.
(active_eh_region, nested_eh_region, label_value_list,
nonlocal_label_list): New static variables.
(make_edges, delete_unreachable_blocks, delete_block): New static
functions, broken out of find_basic_blocks_1.
(record_volatile_insns, mark_regs_live_at_end, set_noop_p,
noop_move_p): New static functions, broken out of life_analysis_1.
From-SVN: r22963
1998-10-09 17:58:37 +02:00
|
|
|
|
static void
|
1999-09-21 23:15:37 +02:00
|
|
|
|
make_edges (label_value_list)
|
1999-02-26 00:45:42 +01:00
|
|
|
|
rtx label_value_list;
|
flow.c (life_analysis_1): Break out some functions.
Fri Oct 9 15:57:51 1998 Bernd Schmidt <crux@Pool.Informatik.RWTH-Aachen.DE>
* flow.c (life_analysis_1): Break out some functions.
(find_basic_blocks_1): Likewise. Also move some variables out and
make them static.
Rename NONLOCAL_LABEL_LIST arg to NONLOCAL_LABELS and initialize
new static var nonlocal_label_list with it.
(active_eh_region, nested_eh_region, label_value_list,
nonlocal_label_list): New static variables.
(make_edges, delete_unreachable_blocks, delete_block): New static
functions, broken out of find_basic_blocks_1.
(record_volatile_insns, mark_regs_live_at_end, set_noop_p,
noop_move_p): New static functions, broken out of life_analysis_1.
From-SVN: r22963
1998-10-09 17:58:37 +02:00
|
|
|
|
{
|
1999-02-26 00:45:42 +01:00
|
|
|
|
int i;
|
1999-08-10 18:19:16 +02:00
|
|
|
|
eh_nesting_info *eh_nest_info = init_eh_nesting_info ();
|
1999-10-05 21:01:01 +02:00
|
|
|
|
sbitmap *edge_cache = NULL;
|
1999-02-26 00:45:42 +01:00
|
|
|
|
|
|
|
|
|
/* Assume no computed jump; revise as we create edges. */
|
|
|
|
|
current_function_has_computed_jump = 0;
|
|
|
|
|
|
1999-10-05 21:01:01 +02:00
|
|
|
|
/* Heavy use of computed goto in machine-generated code can lead to
|
|
|
|
|
nearly fully-connected CFGs. In that case we spend a significant
|
|
|
|
|
amount of time searching the edge lists for duplicates. */
|
|
|
|
|
if (forced_labels || label_value_list)
|
|
|
|
|
{
|
|
|
|
|
edge_cache = sbitmap_vector_alloc (n_basic_blocks, n_basic_blocks);
|
|
|
|
|
sbitmap_vector_zero (edge_cache, n_basic_blocks);
|
|
|
|
|
}
|
|
|
|
|
|
1999-02-26 00:45:42 +01:00
|
|
|
|
/* By nature of the way these get numbered, block 0 is always the entry. */
|
1999-10-05 21:01:01 +02:00
|
|
|
|
make_edge (edge_cache, ENTRY_BLOCK_PTR, BASIC_BLOCK (0), EDGE_FALLTHRU);
|
flow.c (life_analysis_1): Break out some functions.
Fri Oct 9 15:57:51 1998 Bernd Schmidt <crux@Pool.Informatik.RWTH-Aachen.DE>
* flow.c (life_analysis_1): Break out some functions.
(find_basic_blocks_1): Likewise. Also move some variables out and
make them static.
Rename NONLOCAL_LABEL_LIST arg to NONLOCAL_LABELS and initialize
new static var nonlocal_label_list with it.
(active_eh_region, nested_eh_region, label_value_list,
nonlocal_label_list): New static variables.
(make_edges, delete_unreachable_blocks, delete_block): New static
functions, broken out of find_basic_blocks_1.
(record_volatile_insns, mark_regs_live_at_end, set_noop_p,
noop_move_p): New static functions, broken out of life_analysis_1.
From-SVN: r22963
1998-10-09 17:58:37 +02:00
|
|
|
|
|
1999-02-26 00:45:42 +01:00
|
|
|
|
for (i = 0; i < n_basic_blocks; ++i)
|
1998-10-30 00:18:51 +01:00
|
|
|
|
{
|
1999-02-26 00:45:42 +01:00
|
|
|
|
basic_block bb = BASIC_BLOCK (i);
|
1999-09-21 23:15:37 +02:00
|
|
|
|
rtx insn, x;
|
1999-02-26 00:45:42 +01:00
|
|
|
|
enum rtx_code code;
|
1999-03-06 18:19:39 +01:00
|
|
|
|
int force_fallthru = 0;
|
1998-10-30 00:18:51 +01:00
|
|
|
|
|
1999-09-21 23:15:37 +02:00
|
|
|
|
/* Examine the last instruction of the block, and discover the
|
1999-02-26 00:45:42 +01:00
|
|
|
|
ways we can leave the block. */
|
|
|
|
|
|
|
|
|
|
insn = bb->end;
|
|
|
|
|
code = GET_CODE (insn);
|
|
|
|
|
|
|
|
|
|
/* A branch. */
|
|
|
|
|
if (code == JUMP_INSN)
|
|
|
|
|
{
|
|
|
|
|
rtx tmp;
|
|
|
|
|
|
|
|
|
|
/* ??? Recognize a tablejump and do the right thing. */
|
|
|
|
|
if ((tmp = JUMP_LABEL (insn)) != NULL_RTX
|
|
|
|
|
&& (tmp = NEXT_INSN (tmp)) != NULL_RTX
|
|
|
|
|
&& GET_CODE (tmp) == JUMP_INSN
|
|
|
|
|
&& (GET_CODE (PATTERN (tmp)) == ADDR_VEC
|
|
|
|
|
|| GET_CODE (PATTERN (tmp)) == ADDR_DIFF_VEC))
|
|
|
|
|
{
|
|
|
|
|
rtvec vec;
|
|
|
|
|
int j;
|
|
|
|
|
|
|
|
|
|
if (GET_CODE (PATTERN (tmp)) == ADDR_VEC)
|
|
|
|
|
vec = XVEC (PATTERN (tmp), 0);
|
|
|
|
|
else
|
|
|
|
|
vec = XVEC (PATTERN (tmp), 1);
|
|
|
|
|
|
|
|
|
|
for (j = GET_NUM_ELEM (vec) - 1; j >= 0; --j)
|
1999-10-05 21:01:01 +02:00
|
|
|
|
make_label_edge (edge_cache, bb,
|
|
|
|
|
XEXP (RTVEC_ELT (vec, j), 0), 0);
|
1999-03-06 18:19:39 +01:00
|
|
|
|
|
|
|
|
|
/* Some targets (eg, ARM) emit a conditional jump that also
|
|
|
|
|
contains the out-of-range target. Scan for these and
|
|
|
|
|
add an edge if necessary. */
|
|
|
|
|
if ((tmp = single_set (insn)) != NULL
|
|
|
|
|
&& SET_DEST (tmp) == pc_rtx
|
|
|
|
|
&& GET_CODE (SET_SRC (tmp)) == IF_THEN_ELSE
|
|
|
|
|
&& GET_CODE (XEXP (SET_SRC (tmp), 2)) == LABEL_REF)
|
1999-10-05 21:01:01 +02:00
|
|
|
|
make_label_edge (edge_cache, bb,
|
|
|
|
|
XEXP (XEXP (SET_SRC (tmp), 2), 0), 0);
|
1999-03-06 18:19:39 +01:00
|
|
|
|
|
|
|
|
|
#ifdef CASE_DROPS_THROUGH
|
|
|
|
|
/* Silly VAXen. The ADDR_VEC is going to be in the way of
|
|
|
|
|
us naturally detecting fallthru into the next block. */
|
|
|
|
|
force_fallthru = 1;
|
|
|
|
|
#endif
|
1999-02-26 00:45:42 +01:00
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* If this is a computed jump, then mark it as reaching
|
|
|
|
|
everything on the label_value_list and forced_labels list. */
|
|
|
|
|
else if (computed_jump_p (insn))
|
|
|
|
|
{
|
flow.c (life_analysis_1): Break out some functions.
Fri Oct 9 15:57:51 1998 Bernd Schmidt <crux@Pool.Informatik.RWTH-Aachen.DE>
* flow.c (life_analysis_1): Break out some functions.
(find_basic_blocks_1): Likewise. Also move some variables out and
make them static.
Rename NONLOCAL_LABEL_LIST arg to NONLOCAL_LABELS and initialize
new static var nonlocal_label_list with it.
(active_eh_region, nested_eh_region, label_value_list,
nonlocal_label_list): New static variables.
(make_edges, delete_unreachable_blocks, delete_block): New static
functions, broken out of find_basic_blocks_1.
(record_volatile_insns, mark_regs_live_at_end, set_noop_p,
noop_move_p): New static functions, broken out of life_analysis_1.
From-SVN: r22963
1998-10-09 17:58:37 +02:00
|
|
|
|
current_function_has_computed_jump = 1;
|
|
|
|
|
|
1999-02-26 00:45:42 +01:00
|
|
|
|
for (x = label_value_list; x; x = XEXP (x, 1))
|
1999-10-05 21:01:01 +02:00
|
|
|
|
make_label_edge (edge_cache, bb, XEXP (x, 0), EDGE_ABNORMAL);
|
1999-02-26 00:45:42 +01:00
|
|
|
|
|
flow.c (life_analysis_1): Break out some functions.
Fri Oct 9 15:57:51 1998 Bernd Schmidt <crux@Pool.Informatik.RWTH-Aachen.DE>
* flow.c (life_analysis_1): Break out some functions.
(find_basic_blocks_1): Likewise. Also move some variables out and
make them static.
Rename NONLOCAL_LABEL_LIST arg to NONLOCAL_LABELS and initialize
new static var nonlocal_label_list with it.
(active_eh_region, nested_eh_region, label_value_list,
nonlocal_label_list): New static variables.
(make_edges, delete_unreachable_blocks, delete_block): New static
functions, broken out of find_basic_blocks_1.
(record_volatile_insns, mark_regs_live_at_end, set_noop_p,
noop_move_p): New static functions, broken out of life_analysis_1.
From-SVN: r22963
1998-10-09 17:58:37 +02:00
|
|
|
|
for (x = forced_labels; x; x = XEXP (x, 1))
|
1999-10-05 21:01:01 +02:00
|
|
|
|
make_label_edge (edge_cache, bb, XEXP (x, 0), EDGE_ABNORMAL);
|
flow.c (life_analysis_1): Break out some functions.
Fri Oct 9 15:57:51 1998 Bernd Schmidt <crux@Pool.Informatik.RWTH-Aachen.DE>
* flow.c (life_analysis_1): Break out some functions.
(find_basic_blocks_1): Likewise. Also move some variables out and
make them static.
Rename NONLOCAL_LABEL_LIST arg to NONLOCAL_LABELS and initialize
new static var nonlocal_label_list with it.
(active_eh_region, nested_eh_region, label_value_list,
nonlocal_label_list): New static variables.
(make_edges, delete_unreachable_blocks, delete_block): New static
functions, broken out of find_basic_blocks_1.
(record_volatile_insns, mark_regs_live_at_end, set_noop_p,
noop_move_p): New static functions, broken out of life_analysis_1.
From-SVN: r22963
1998-10-09 17:58:37 +02:00
|
|
|
|
}
|
|
|
|
|
|
1999-02-26 00:45:42 +01:00
|
|
|
|
/* Returns create an exit out. */
|
|
|
|
|
else if (returnjump_p (insn))
|
1999-10-05 21:01:01 +02:00
|
|
|
|
make_edge (edge_cache, bb, EXIT_BLOCK_PTR, 0);
|
1999-02-26 00:45:42 +01:00
|
|
|
|
|
|
|
|
|
/* Otherwise, we have a plain conditional or unconditional jump. */
|
|
|
|
|
else
|
flow.c (life_analysis_1): Break out some functions.
Fri Oct 9 15:57:51 1998 Bernd Schmidt <crux@Pool.Informatik.RWTH-Aachen.DE>
* flow.c (life_analysis_1): Break out some functions.
(find_basic_blocks_1): Likewise. Also move some variables out and
make them static.
Rename NONLOCAL_LABEL_LIST arg to NONLOCAL_LABELS and initialize
new static var nonlocal_label_list with it.
(active_eh_region, nested_eh_region, label_value_list,
nonlocal_label_list): New static variables.
(make_edges, delete_unreachable_blocks, delete_block): New static
functions, broken out of find_basic_blocks_1.
(record_volatile_insns, mark_regs_live_at_end, set_noop_p,
noop_move_p): New static functions, broken out of life_analysis_1.
From-SVN: r22963
1998-10-09 17:58:37 +02:00
|
|
|
|
{
|
1999-02-26 00:45:42 +01:00
|
|
|
|
if (! JUMP_LABEL (insn))
|
|
|
|
|
abort ();
|
1999-10-05 21:01:01 +02:00
|
|
|
|
make_label_edge (edge_cache, bb, JUMP_LABEL (insn), 0);
|
1999-02-26 00:45:42 +01:00
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* If this is a CALL_INSN, then mark it as reaching the active EH
|
|
|
|
|
handler for this CALL_INSN. If we're handling asynchronous
|
|
|
|
|
exceptions then any insn can reach any of the active handlers.
|
1999-01-19 10:39:37 +01:00
|
|
|
|
|
1999-02-26 00:45:42 +01:00
|
|
|
|
Also mark the CALL_INSN as reaching any nonlocal goto handler. */
|
1999-01-19 10:39:37 +01:00
|
|
|
|
|
1999-04-14 22:36:33 +02:00
|
|
|
|
if (code == CALL_INSN || asynchronous_exceptions)
|
1999-02-26 00:45:42 +01:00
|
|
|
|
{
|
1999-09-21 23:15:37 +02:00
|
|
|
|
/* If there's an EH region active at the end of a block,
|
|
|
|
|
add the appropriate edges. */
|
|
|
|
|
if (bb->eh_end >= 0)
|
1999-10-05 21:01:01 +02:00
|
|
|
|
make_eh_edge (edge_cache, eh_nest_info, bb, insn, bb->eh_end);
|
1999-09-21 23:15:37 +02:00
|
|
|
|
|
|
|
|
|
/* If we have asynchronous exceptions, do the same for *all*
|
|
|
|
|
exception regions active in the block. */
|
|
|
|
|
if (asynchronous_exceptions
|
|
|
|
|
&& bb->eh_beg != bb->eh_end)
|
1999-02-26 00:45:42 +01:00
|
|
|
|
{
|
1999-09-21 23:15:37 +02:00
|
|
|
|
if (bb->eh_beg >= 0)
|
1999-10-05 21:01:01 +02:00
|
|
|
|
make_eh_edge (edge_cache, eh_nest_info, bb,
|
|
|
|
|
NULL_RTX, bb->eh_beg);
|
1999-09-21 23:15:37 +02:00
|
|
|
|
|
1999-10-05 05:44:26 +02:00
|
|
|
|
for (x = bb->head; x != bb->end; x = NEXT_INSN (x))
|
1999-09-21 23:15:37 +02:00
|
|
|
|
if (GET_CODE (x) == NOTE
|
|
|
|
|
&& (NOTE_LINE_NUMBER (x) == NOTE_INSN_EH_REGION_BEG
|
|
|
|
|
|| NOTE_LINE_NUMBER (x) == NOTE_INSN_EH_REGION_END))
|
|
|
|
|
{
|
|
|
|
|
int region = NOTE_EH_HANDLER (x);
|
1999-10-05 21:01:01 +02:00
|
|
|
|
make_eh_edge (edge_cache, eh_nest_info, bb,
|
|
|
|
|
NULL_RTX, region);
|
1999-09-21 23:15:37 +02:00
|
|
|
|
}
|
1999-02-26 00:45:42 +01:00
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (code == CALL_INSN && nonlocal_goto_handler_labels)
|
|
|
|
|
{
|
flow.c (life_analysis_1): Break out some functions.
Fri Oct 9 15:57:51 1998 Bernd Schmidt <crux@Pool.Informatik.RWTH-Aachen.DE>
* flow.c (life_analysis_1): Break out some functions.
(find_basic_blocks_1): Likewise. Also move some variables out and
make them static.
Rename NONLOCAL_LABEL_LIST arg to NONLOCAL_LABELS and initialize
new static var nonlocal_label_list with it.
(active_eh_region, nested_eh_region, label_value_list,
nonlocal_label_list): New static variables.
(make_edges, delete_unreachable_blocks, delete_block): New static
functions, broken out of find_basic_blocks_1.
(record_volatile_insns, mark_regs_live_at_end, set_noop_p,
noop_move_p): New static functions, broken out of life_analysis_1.
From-SVN: r22963
1998-10-09 17:58:37 +02:00
|
|
|
|
/* ??? This could be made smarter: in some cases it's possible
|
|
|
|
|
to tell that certain calls will not do a nonlocal goto.
|
|
|
|
|
|
|
|
|
|
For example, if the nested functions that do the nonlocal
|
|
|
|
|
gotos do not have their addresses taken, then only calls to
|
|
|
|
|
those functions or to other nested functions that use them
|
|
|
|
|
could possibly do nonlocal gotos. */
|
1999-08-10 18:19:16 +02:00
|
|
|
|
/* We do know that a REG_EH_REGION note with a value less
|
|
|
|
|
than 0 is guaranteed not to perform a non-local goto. */
|
|
|
|
|
rtx note = find_reg_note (insn, REG_EH_REGION, NULL_RTX);
|
|
|
|
|
if (!note || XINT (XEXP (note, 0), 0) >= 0)
|
|
|
|
|
for (x = nonlocal_goto_handler_labels; x ; x = XEXP (x, 1))
|
1999-10-05 21:01:01 +02:00
|
|
|
|
make_label_edge (edge_cache, bb, XEXP (x, 0),
|
1999-08-10 18:19:16 +02:00
|
|
|
|
EDGE_ABNORMAL | EDGE_ABNORMAL_CALL);
|
flow.c (life_analysis_1): Break out some functions.
Fri Oct 9 15:57:51 1998 Bernd Schmidt <crux@Pool.Informatik.RWTH-Aachen.DE>
* flow.c (life_analysis_1): Break out some functions.
(find_basic_blocks_1): Likewise. Also move some variables out and
make them static.
Rename NONLOCAL_LABEL_LIST arg to NONLOCAL_LABELS and initialize
new static var nonlocal_label_list with it.
(active_eh_region, nested_eh_region, label_value_list,
nonlocal_label_list): New static variables.
(make_edges, delete_unreachable_blocks, delete_block): New static
functions, broken out of find_basic_blocks_1.
(record_volatile_insns, mark_regs_live_at_end, set_noop_p,
noop_move_p): New static functions, broken out of life_analysis_1.
From-SVN: r22963
1998-10-09 17:58:37 +02:00
|
|
|
|
}
|
|
|
|
|
}
|
1999-02-26 00:45:42 +01:00
|
|
|
|
|
|
|
|
|
/* We know something about the structure of the function __throw in
|
|
|
|
|
libgcc2.c. It is the only function that ever contains eh_stub
|
|
|
|
|
labels. It modifies its return address so that the last block
|
|
|
|
|
returns to one of the eh_stub labels within it. So we have to
|
|
|
|
|
make additional edges in the flow graph. */
|
|
|
|
|
if (i + 1 == n_basic_blocks && eh_return_stub_label != 0)
|
1999-10-05 21:01:01 +02:00
|
|
|
|
make_label_edge (edge_cache, bb, eh_return_stub_label, EDGE_EH);
|
1999-02-26 00:45:42 +01:00
|
|
|
|
|
|
|
|
|
/* Find out if we can drop through to the next block. */
|
|
|
|
|
insn = next_nonnote_insn (insn);
|
1999-03-06 18:19:39 +01:00
|
|
|
|
if (!insn || (i + 1 == n_basic_blocks && force_fallthru))
|
1999-10-05 21:01:01 +02:00
|
|
|
|
make_edge (edge_cache, bb, EXIT_BLOCK_PTR, EDGE_FALLTHRU);
|
1999-02-26 00:45:42 +01:00
|
|
|
|
else if (i + 1 < n_basic_blocks)
|
|
|
|
|
{
|
|
|
|
|
rtx tmp = BLOCK_HEAD (i + 1);
|
|
|
|
|
if (GET_CODE (tmp) == NOTE)
|
|
|
|
|
tmp = next_nonnote_insn (tmp);
|
1999-03-06 18:19:39 +01:00
|
|
|
|
if (force_fallthru || insn == tmp)
|
1999-10-05 21:01:01 +02:00
|
|
|
|
make_edge (edge_cache, bb, BASIC_BLOCK (i + 1), EDGE_FALLTHRU);
|
1999-02-26 00:45:42 +01:00
|
|
|
|
}
|
flow.c (life_analysis_1): Break out some functions.
Fri Oct 9 15:57:51 1998 Bernd Schmidt <crux@Pool.Informatik.RWTH-Aachen.DE>
* flow.c (life_analysis_1): Break out some functions.
(find_basic_blocks_1): Likewise. Also move some variables out and
make them static.
Rename NONLOCAL_LABEL_LIST arg to NONLOCAL_LABELS and initialize
new static var nonlocal_label_list with it.
(active_eh_region, nested_eh_region, label_value_list,
nonlocal_label_list): New static variables.
(make_edges, delete_unreachable_blocks, delete_block): New static
functions, broken out of find_basic_blocks_1.
(record_volatile_insns, mark_regs_live_at_end, set_noop_p,
noop_move_p): New static functions, broken out of life_analysis_1.
From-SVN: r22963
1998-10-09 17:58:37 +02:00
|
|
|
|
}
|
1999-10-05 21:01:01 +02:00
|
|
|
|
|
1999-08-10 18:19:16 +02:00
|
|
|
|
free_eh_nesting_info (eh_nest_info);
|
1999-10-05 21:01:01 +02:00
|
|
|
|
if (edge_cache)
|
|
|
|
|
sbitmap_vector_free (edge_cache);
|
1999-02-26 00:45:42 +01:00
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Create an edge between two basic blocks. FLAGS are auxiliary information
|
|
|
|
|
about the edge that is accumulated between calls. */
|
|
|
|
|
|
|
|
|
|
static void
|
1999-10-05 21:01:01 +02:00
|
|
|
|
make_edge (edge_cache, src, dst, flags)
|
|
|
|
|
sbitmap *edge_cache;
|
1999-02-26 00:45:42 +01:00
|
|
|
|
basic_block src, dst;
|
|
|
|
|
int flags;
|
|
|
|
|
{
|
1999-10-05 21:01:01 +02:00
|
|
|
|
int use_edge_cache;
|
1999-02-26 00:45:42 +01:00
|
|
|
|
edge e;
|
|
|
|
|
|
1999-10-05 21:01:01 +02:00
|
|
|
|
/* Don't bother with edge cache for ENTRY or EXIT; there aren't that
|
|
|
|
|
many edges to them, and we didn't allocate memory for it. */
|
|
|
|
|
use_edge_cache = (edge_cache
|
|
|
|
|
&& src != ENTRY_BLOCK_PTR
|
|
|
|
|
&& dst != EXIT_BLOCK_PTR);
|
1999-02-26 00:45:42 +01:00
|
|
|
|
|
1999-10-05 21:01:01 +02:00
|
|
|
|
/* Make sure we don't add duplicate edges. */
|
|
|
|
|
if (! use_edge_cache || TEST_BIT (edge_cache[src->index], dst->index))
|
|
|
|
|
for (e = src->succ; e ; e = e->succ_next)
|
|
|
|
|
if (e->dest == dst)
|
|
|
|
|
{
|
|
|
|
|
e->flags |= flags;
|
|
|
|
|
return;
|
|
|
|
|
}
|
1999-02-26 00:45:42 +01:00
|
|
|
|
|
|
|
|
|
e = (edge) xcalloc (1, sizeof (*e));
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
n_edges++;
|
1999-02-26 00:45:42 +01:00
|
|
|
|
|
|
|
|
|
e->succ_next = src->succ;
|
|
|
|
|
e->pred_next = dst->pred;
|
|
|
|
|
e->src = src;
|
|
|
|
|
e->dest = dst;
|
|
|
|
|
e->flags = flags;
|
|
|
|
|
|
|
|
|
|
src->succ = e;
|
|
|
|
|
dst->pred = e;
|
1999-10-05 21:01:01 +02:00
|
|
|
|
|
|
|
|
|
if (use_edge_cache)
|
|
|
|
|
SET_BIT (edge_cache[src->index], dst->index);
|
1999-02-26 00:45:42 +01:00
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Create an edge from a basic block to a label. */
|
|
|
|
|
|
|
|
|
|
static void
|
1999-10-05 21:01:01 +02:00
|
|
|
|
make_label_edge (edge_cache, src, label, flags)
|
|
|
|
|
sbitmap *edge_cache;
|
1999-02-26 00:45:42 +01:00
|
|
|
|
basic_block src;
|
|
|
|
|
rtx label;
|
|
|
|
|
int flags;
|
|
|
|
|
{
|
|
|
|
|
if (GET_CODE (label) != CODE_LABEL)
|
|
|
|
|
abort ();
|
|
|
|
|
|
|
|
|
|
/* If the label was never emitted, this insn is junk, but avoid a
|
|
|
|
|
crash trying to refer to BLOCK_FOR_INSN (label). This can happen
|
|
|
|
|
as a result of a syntax error and a diagnostic has already been
|
|
|
|
|
printed. */
|
|
|
|
|
|
|
|
|
|
if (INSN_UID (label) == 0)
|
|
|
|
|
return;
|
|
|
|
|
|
1999-10-05 21:01:01 +02:00
|
|
|
|
make_edge (edge_cache, src, BLOCK_FOR_INSN (label), flags);
|
1999-02-26 00:45:42 +01:00
|
|
|
|
}
|
1998-12-08 15:04:03 +01:00
|
|
|
|
|
1999-09-21 23:15:37 +02:00
|
|
|
|
/* Create the edges generated by INSN in REGION. */
|
|
|
|
|
|
|
|
|
|
static void
|
1999-10-05 21:01:01 +02:00
|
|
|
|
make_eh_edge (edge_cache, eh_nest_info, src, insn, region)
|
|
|
|
|
sbitmap *edge_cache;
|
1999-09-21 23:15:37 +02:00
|
|
|
|
eh_nesting_info *eh_nest_info;
|
|
|
|
|
basic_block src;
|
|
|
|
|
rtx insn;
|
|
|
|
|
int region;
|
|
|
|
|
{
|
|
|
|
|
handler_info **handler_list;
|
|
|
|
|
int num, is_call;
|
|
|
|
|
|
|
|
|
|
is_call = (insn && GET_CODE (insn) == CALL_INSN ? EDGE_ABNORMAL_CALL : 0);
|
|
|
|
|
num = reachable_handlers (region, eh_nest_info, insn, &handler_list);
|
|
|
|
|
while (--num >= 0)
|
|
|
|
|
{
|
1999-10-05 21:01:01 +02:00
|
|
|
|
make_label_edge (edge_cache, src, handler_list[num]->handler_label,
|
1999-09-21 23:15:37 +02:00
|
|
|
|
EDGE_ABNORMAL | EDGE_EH | is_call);
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* EH_REGION notes appearing between basic blocks is ambiguous, and even
|
|
|
|
|
dangerous if we intend to move basic blocks around. Move such notes
|
|
|
|
|
into the following block. */
|
|
|
|
|
|
|
|
|
|
static void
|
|
|
|
|
move_stray_eh_region_notes ()
|
|
|
|
|
{
|
|
|
|
|
int i;
|
|
|
|
|
basic_block b1, b2;
|
|
|
|
|
|
|
|
|
|
if (n_basic_blocks < 2)
|
|
|
|
|
return;
|
|
|
|
|
|
|
|
|
|
b2 = BASIC_BLOCK (n_basic_blocks - 1);
|
|
|
|
|
for (i = n_basic_blocks - 2; i >= 0; --i, b2 = b1)
|
|
|
|
|
{
|
|
|
|
|
rtx insn, next, list = NULL_RTX;
|
|
|
|
|
|
|
|
|
|
b1 = BASIC_BLOCK (i);
|
|
|
|
|
for (insn = NEXT_INSN (b1->end); insn != b2->head; insn = next)
|
|
|
|
|
{
|
|
|
|
|
next = NEXT_INSN (insn);
|
|
|
|
|
if (GET_CODE (insn) == NOTE
|
|
|
|
|
&& (NOTE_LINE_NUMBER (insn) == NOTE_INSN_EH_REGION_BEG
|
|
|
|
|
|| NOTE_LINE_NUMBER (insn) == NOTE_INSN_EH_REGION_END))
|
|
|
|
|
{
|
|
|
|
|
/* Unlink from the insn chain. */
|
|
|
|
|
NEXT_INSN (PREV_INSN (insn)) = next;
|
|
|
|
|
PREV_INSN (next) = PREV_INSN (insn);
|
|
|
|
|
|
|
|
|
|
/* Queue it. */
|
|
|
|
|
NEXT_INSN (insn) = list;
|
|
|
|
|
list = insn;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (list == NULL_RTX)
|
|
|
|
|
continue;
|
|
|
|
|
|
|
|
|
|
/* Find where to insert these things. */
|
|
|
|
|
insn = b2->head;
|
|
|
|
|
if (GET_CODE (insn) == CODE_LABEL)
|
|
|
|
|
insn = NEXT_INSN (insn);
|
|
|
|
|
|
|
|
|
|
while (list)
|
|
|
|
|
{
|
|
|
|
|
next = NEXT_INSN (list);
|
|
|
|
|
add_insn_after (list, insn);
|
|
|
|
|
list = next;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Recompute eh_beg/eh_end for each basic block. */
|
|
|
|
|
|
|
|
|
|
static void
|
|
|
|
|
record_active_eh_regions (f)
|
|
|
|
|
rtx f;
|
|
|
|
|
{
|
|
|
|
|
rtx insn, eh_list = NULL_RTX;
|
|
|
|
|
int i = 0;
|
|
|
|
|
basic_block bb = BASIC_BLOCK (0);
|
|
|
|
|
|
|
|
|
|
for (insn = f; insn ; insn = NEXT_INSN (insn))
|
|
|
|
|
{
|
|
|
|
|
if (bb->head == insn)
|
|
|
|
|
bb->eh_beg = (eh_list ? NOTE_EH_HANDLER (XEXP (eh_list, 0)) : -1);
|
|
|
|
|
|
|
|
|
|
if (GET_CODE (insn) == NOTE)
|
|
|
|
|
{
|
|
|
|
|
int kind = NOTE_LINE_NUMBER (insn);
|
|
|
|
|
if (kind == NOTE_INSN_EH_REGION_BEG)
|
|
|
|
|
eh_list = alloc_INSN_LIST (insn, eh_list);
|
|
|
|
|
else if (kind == NOTE_INSN_EH_REGION_END)
|
|
|
|
|
{
|
|
|
|
|
rtx t = XEXP (eh_list, 1);
|
|
|
|
|
free_INSN_LIST_node (eh_list);
|
|
|
|
|
eh_list = t;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (bb->end == insn)
|
|
|
|
|
{
|
|
|
|
|
bb->eh_end = (eh_list ? NOTE_EH_HANDLER (XEXP (eh_list, 0)) : -1);
|
|
|
|
|
i += 1;
|
1999-09-22 14:09:23 +02:00
|
|
|
|
if (i == n_basic_blocks)
|
|
|
|
|
break;
|
1999-09-21 23:15:37 +02:00
|
|
|
|
bb = BASIC_BLOCK (i);
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
1999-02-26 00:45:42 +01:00
|
|
|
|
/* Identify critical edges and set the bits appropriately. */
|
1999-09-21 23:15:37 +02:00
|
|
|
|
|
1999-02-26 00:45:42 +01:00
|
|
|
|
static void
|
|
|
|
|
mark_critical_edges ()
|
|
|
|
|
{
|
|
|
|
|
int i, n = n_basic_blocks;
|
|
|
|
|
basic_block bb;
|
|
|
|
|
|
|
|
|
|
/* We begin with the entry block. This is not terribly important now,
|
|
|
|
|
but could be if a front end (Fortran) implemented alternate entry
|
|
|
|
|
points. */
|
|
|
|
|
bb = ENTRY_BLOCK_PTR;
|
|
|
|
|
i = -1;
|
|
|
|
|
|
|
|
|
|
while (1)
|
1998-12-08 15:04:03 +01:00
|
|
|
|
{
|
1999-02-26 00:45:42 +01:00
|
|
|
|
edge e;
|
|
|
|
|
|
|
|
|
|
/* (1) Critical edges must have a source with multiple successors. */
|
|
|
|
|
if (bb->succ && bb->succ->succ_next)
|
|
|
|
|
{
|
|
|
|
|
for (e = bb->succ; e ; e = e->succ_next)
|
|
|
|
|
{
|
|
|
|
|
/* (2) Critical edges must have a destination with multiple
|
|
|
|
|
predecessors. Note that we know there is at least one
|
|
|
|
|
predecessor -- the edge we followed to get here. */
|
|
|
|
|
if (e->dest->pred->pred_next)
|
|
|
|
|
e->flags |= EDGE_CRITICAL;
|
|
|
|
|
else
|
|
|
|
|
e->flags &= ~EDGE_CRITICAL;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
else
|
|
|
|
|
{
|
|
|
|
|
for (e = bb->succ; e ; e = e->succ_next)
|
|
|
|
|
e->flags &= ~EDGE_CRITICAL;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (++i >= n)
|
|
|
|
|
break;
|
|
|
|
|
bb = BASIC_BLOCK (i);
|
1998-12-08 15:04:03 +01:00
|
|
|
|
}
|
1999-02-26 00:45:42 +01:00
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Split a (typically critical) edge. Return the new block.
|
|
|
|
|
Abort on abnormal edges.
|
|
|
|
|
|
|
|
|
|
??? The code generally expects to be called on critical edges.
|
|
|
|
|
The case of a block ending in an unconditional jump to a
|
|
|
|
|
block with multiple predecessors is not handled optimally. */
|
|
|
|
|
|
|
|
|
|
basic_block
|
|
|
|
|
split_edge (edge_in)
|
|
|
|
|
edge edge_in;
|
|
|
|
|
{
|
|
|
|
|
basic_block old_pred, bb, old_succ;
|
|
|
|
|
edge edge_out;
|
|
|
|
|
rtx bb_note;
|
1999-09-21 20:57:12 +02:00
|
|
|
|
int i, j;
|
1999-02-26 00:45:42 +01:00
|
|
|
|
|
|
|
|
|
/* Abnormal edges cannot be split. */
|
|
|
|
|
if ((edge_in->flags & EDGE_ABNORMAL) != 0)
|
|
|
|
|
abort ();
|
|
|
|
|
|
|
|
|
|
old_pred = edge_in->src;
|
|
|
|
|
old_succ = edge_in->dest;
|
|
|
|
|
|
|
|
|
|
/* Remove the existing edge from the destination's pred list. */
|
|
|
|
|
{
|
|
|
|
|
edge *pp;
|
|
|
|
|
for (pp = &old_succ->pred; *pp != edge_in; pp = &(*pp)->pred_next)
|
|
|
|
|
continue;
|
|
|
|
|
*pp = edge_in->pred_next;
|
1999-04-06 18:21:09 +02:00
|
|
|
|
edge_in->pred_next = NULL;
|
1999-02-26 00:45:42 +01:00
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Create the new structures. */
|
|
|
|
|
bb = (basic_block) obstack_alloc (function_obstack, sizeof (*bb));
|
|
|
|
|
edge_out = (edge) xcalloc (1, sizeof (*edge_out));
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
n_edges++;
|
1999-02-26 00:45:42 +01:00
|
|
|
|
|
|
|
|
|
memset (bb, 0, sizeof (*bb));
|
|
|
|
|
bb->global_live_at_start = OBSTACK_ALLOC_REG_SET (function_obstack);
|
|
|
|
|
bb->global_live_at_end = OBSTACK_ALLOC_REG_SET (function_obstack);
|
|
|
|
|
|
|
|
|
|
/* ??? This info is likely going to be out of date very soon. */
|
|
|
|
|
if (old_succ->global_live_at_start)
|
|
|
|
|
{
|
|
|
|
|
COPY_REG_SET (bb->global_live_at_start, old_succ->global_live_at_start);
|
|
|
|
|
COPY_REG_SET (bb->global_live_at_end, old_succ->global_live_at_start);
|
|
|
|
|
}
|
|
|
|
|
else
|
|
|
|
|
{
|
|
|
|
|
CLEAR_REG_SET (bb->global_live_at_start);
|
|
|
|
|
CLEAR_REG_SET (bb->global_live_at_end);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Wire them up. */
|
|
|
|
|
bb->pred = edge_in;
|
|
|
|
|
bb->succ = edge_out;
|
1999-04-06 18:21:09 +02:00
|
|
|
|
|
1999-02-26 00:45:42 +01:00
|
|
|
|
edge_in->dest = bb;
|
1999-04-06 18:21:09 +02:00
|
|
|
|
edge_in->flags &= ~EDGE_CRITICAL;
|
|
|
|
|
|
|
|
|
|
edge_out->pred_next = old_succ->pred;
|
|
|
|
|
edge_out->succ_next = NULL;
|
1999-02-26 00:45:42 +01:00
|
|
|
|
edge_out->src = bb;
|
|
|
|
|
edge_out->dest = old_succ;
|
1999-04-06 18:21:09 +02:00
|
|
|
|
edge_out->flags = EDGE_FALLTHRU;
|
|
|
|
|
edge_out->probability = REG_BR_PROB_BASE;
|
|
|
|
|
|
|
|
|
|
old_succ->pred = edge_out;
|
1999-02-26 00:45:42 +01:00
|
|
|
|
|
|
|
|
|
/* Tricky case -- if there existed a fallthru into the successor
|
|
|
|
|
(and we're not it) we must add a new unconditional jump around
|
|
|
|
|
the new block we're actually interested in.
|
|
|
|
|
|
|
|
|
|
Further, if that edge is critical, this means a second new basic
|
|
|
|
|
block must be created to hold it. In order to simplify correct
|
|
|
|
|
insn placement, do this before we touch the existing basic block
|
|
|
|
|
ordering for the block we were really wanting. */
|
|
|
|
|
if ((edge_in->flags & EDGE_FALLTHRU) == 0)
|
|
|
|
|
{
|
|
|
|
|
edge e;
|
1999-04-06 18:21:09 +02:00
|
|
|
|
for (e = edge_out->pred_next; e ; e = e->pred_next)
|
1999-02-26 00:45:42 +01:00
|
|
|
|
if (e->flags & EDGE_FALLTHRU)
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
if (e)
|
|
|
|
|
{
|
|
|
|
|
basic_block jump_block;
|
|
|
|
|
rtx pos;
|
|
|
|
|
|
|
|
|
|
if ((e->flags & EDGE_CRITICAL) == 0)
|
|
|
|
|
{
|
|
|
|
|
/* Non critical -- we can simply add a jump to the end
|
|
|
|
|
of the existing predecessor. */
|
|
|
|
|
jump_block = e->src;
|
|
|
|
|
}
|
|
|
|
|
else
|
|
|
|
|
{
|
|
|
|
|
/* We need a new block to hold the jump. The simplest
|
|
|
|
|
way to do the bulk of the work here is to recursively
|
|
|
|
|
call ourselves. */
|
|
|
|
|
jump_block = split_edge (e);
|
|
|
|
|
e = jump_block->succ;
|
|
|
|
|
}
|
|
|
|
|
|
1999-04-06 18:21:09 +02:00
|
|
|
|
/* Now add the jump insn ... */
|
|
|
|
|
pos = emit_jump_insn_after (gen_jump (old_succ->head),
|
|
|
|
|
jump_block->end);
|
1999-02-26 00:45:42 +01:00
|
|
|
|
jump_block->end = pos;
|
|
|
|
|
emit_barrier_after (pos);
|
1999-04-06 18:21:09 +02:00
|
|
|
|
|
|
|
|
|
/* ... let jump know that label is in use, ... */
|
1999-08-10 16:46:16 +02:00
|
|
|
|
JUMP_LABEL (pos) = old_succ->head;
|
1999-04-06 18:21:09 +02:00
|
|
|
|
++LABEL_NUSES (old_succ->head);
|
1999-03-21 13:14:09 +01:00
|
|
|
|
|
1999-02-26 00:45:42 +01:00
|
|
|
|
/* ... and clear fallthru on the outgoing edge. */
|
|
|
|
|
e->flags &= ~EDGE_FALLTHRU;
|
|
|
|
|
|
|
|
|
|
/* Continue splitting the interesting edge. */
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Place the new block just in front of the successor. */
|
|
|
|
|
VARRAY_GROW (basic_block_info, ++n_basic_blocks);
|
1999-09-21 20:57:12 +02:00
|
|
|
|
if (old_succ == EXIT_BLOCK_PTR)
|
|
|
|
|
j = n_basic_blocks - 1;
|
|
|
|
|
else
|
|
|
|
|
j = old_succ->index;
|
|
|
|
|
for (i = n_basic_blocks - 1; i > j; --i)
|
1999-02-26 00:45:42 +01:00
|
|
|
|
{
|
|
|
|
|
basic_block tmp = BASIC_BLOCK (i - 1);
|
|
|
|
|
BASIC_BLOCK (i) = tmp;
|
|
|
|
|
tmp->index = i;
|
|
|
|
|
}
|
|
|
|
|
BASIC_BLOCK (i) = bb;
|
|
|
|
|
bb->index = i;
|
|
|
|
|
|
1999-11-18 07:45:55 +01:00
|
|
|
|
/* Create the basic block note.
|
|
|
|
|
|
|
|
|
|
Where we place the note can have a noticable impact on the generated
|
|
|
|
|
code. Consider this cfg:
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
E
|
|
|
|
|
|
|
|
|
|
|
0
|
|
|
|
|
/ \
|
|
|
|
|
+->1-->2--->E
|
|
|
|
|
| |
|
|
|
|
|
+--+
|
|
|
|
|
|
|
|
|
|
If we need to insert an insn on the edge from block 0 to block 1,
|
|
|
|
|
we want to ensure the instructions we insert are outside of any
|
|
|
|
|
loop notes that physically sit between block 0 and block 1. Otherwise
|
|
|
|
|
we confuse the loop optimizer into thinking the loop is a phony. */
|
|
|
|
|
if (old_succ != EXIT_BLOCK_PTR
|
|
|
|
|
&& PREV_INSN (old_succ->head)
|
|
|
|
|
&& GET_CODE (PREV_INSN (old_succ->head)) == NOTE
|
|
|
|
|
&& NOTE_LINE_NUMBER (PREV_INSN (old_succ->head)) == NOTE_INSN_LOOP_BEG)
|
|
|
|
|
bb_note = emit_note_before (NOTE_INSN_BASIC_BLOCK,
|
|
|
|
|
PREV_INSN (old_succ->head));
|
|
|
|
|
else if (old_succ != EXIT_BLOCK_PTR)
|
1999-09-21 20:57:12 +02:00
|
|
|
|
bb_note = emit_note_before (NOTE_INSN_BASIC_BLOCK, old_succ->head);
|
|
|
|
|
else
|
|
|
|
|
bb_note = emit_note_after (NOTE_INSN_BASIC_BLOCK, get_last_insn ());
|
1999-02-26 00:45:42 +01:00
|
|
|
|
NOTE_BASIC_BLOCK (bb_note) = bb;
|
|
|
|
|
bb->head = bb->end = bb_note;
|
|
|
|
|
|
|
|
|
|
/* Not quite simple -- for non-fallthru edges, we must adjust the
|
|
|
|
|
predecessor's jump instruction to target our new block. */
|
|
|
|
|
if ((edge_in->flags & EDGE_FALLTHRU) == 0)
|
|
|
|
|
{
|
|
|
|
|
rtx tmp, insn = old_pred->end;
|
|
|
|
|
rtx old_label = old_succ->head;
|
|
|
|
|
rtx new_label = gen_label_rtx ();
|
|
|
|
|
|
|
|
|
|
if (GET_CODE (insn) != JUMP_INSN)
|
|
|
|
|
abort ();
|
|
|
|
|
|
|
|
|
|
/* ??? Recognize a tablejump and adjust all matching cases. */
|
|
|
|
|
if ((tmp = JUMP_LABEL (insn)) != NULL_RTX
|
|
|
|
|
&& (tmp = NEXT_INSN (tmp)) != NULL_RTX
|
|
|
|
|
&& GET_CODE (tmp) == JUMP_INSN
|
|
|
|
|
&& (GET_CODE (PATTERN (tmp)) == ADDR_VEC
|
|
|
|
|
|| GET_CODE (PATTERN (tmp)) == ADDR_DIFF_VEC))
|
|
|
|
|
{
|
|
|
|
|
rtvec vec;
|
|
|
|
|
int j;
|
|
|
|
|
|
|
|
|
|
if (GET_CODE (PATTERN (tmp)) == ADDR_VEC)
|
|
|
|
|
vec = XVEC (PATTERN (tmp), 0);
|
|
|
|
|
else
|
|
|
|
|
vec = XVEC (PATTERN (tmp), 1);
|
|
|
|
|
|
|
|
|
|
for (j = GET_NUM_ELEM (vec) - 1; j >= 0; --j)
|
|
|
|
|
if (XEXP (RTVEC_ELT (vec, j), 0) == old_label)
|
|
|
|
|
{
|
|
|
|
|
RTVEC_ELT (vec, j) = gen_rtx_LABEL_REF (VOIDmode, new_label);
|
|
|
|
|
--LABEL_NUSES (old_label);
|
|
|
|
|
++LABEL_NUSES (new_label);
|
|
|
|
|
}
|
1999-10-20 14:45:22 +02:00
|
|
|
|
|
|
|
|
|
/* Handle casesi dispatch insns */
|
|
|
|
|
if ((tmp = single_set (insn)) != NULL
|
|
|
|
|
&& SET_DEST (tmp) == pc_rtx
|
|
|
|
|
&& GET_CODE (SET_SRC (tmp)) == IF_THEN_ELSE
|
|
|
|
|
&& GET_CODE (XEXP (SET_SRC (tmp), 2)) == LABEL_REF
|
|
|
|
|
&& XEXP (XEXP (SET_SRC (tmp), 2), 0) == old_label)
|
|
|
|
|
{
|
|
|
|
|
XEXP (SET_SRC (tmp), 2) = gen_rtx_LABEL_REF (VOIDmode,
|
|
|
|
|
new_label);
|
|
|
|
|
--LABEL_NUSES (old_label);
|
|
|
|
|
++LABEL_NUSES (new_label);
|
|
|
|
|
}
|
1999-02-26 00:45:42 +01:00
|
|
|
|
}
|
|
|
|
|
else
|
|
|
|
|
{
|
|
|
|
|
/* This would have indicated an abnormal edge. */
|
|
|
|
|
if (computed_jump_p (insn))
|
|
|
|
|
abort ();
|
|
|
|
|
|
|
|
|
|
/* A return instruction can't be redirected. */
|
|
|
|
|
if (returnjump_p (insn))
|
|
|
|
|
abort ();
|
|
|
|
|
|
|
|
|
|
/* If the insn doesn't go where we think, we're confused. */
|
|
|
|
|
if (JUMP_LABEL (insn) != old_label)
|
|
|
|
|
abort ();
|
|
|
|
|
|
|
|
|
|
redirect_jump (insn, new_label);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
emit_label_before (new_label, bb_note);
|
|
|
|
|
bb->head = new_label;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
return bb;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Queue instructions for insertion on an edge between two basic blocks.
|
|
|
|
|
The new instructions and basic blocks (if any) will not appear in the
|
|
|
|
|
CFG until commit_edge_insertions is called. */
|
|
|
|
|
|
|
|
|
|
void
|
|
|
|
|
insert_insn_on_edge (pattern, e)
|
|
|
|
|
rtx pattern;
|
|
|
|
|
edge e;
|
|
|
|
|
{
|
|
|
|
|
/* We cannot insert instructions on an abnormal critical edge.
|
|
|
|
|
It will be easier to find the culprit if we die now. */
|
|
|
|
|
if ((e->flags & (EDGE_ABNORMAL|EDGE_CRITICAL))
|
|
|
|
|
== (EDGE_ABNORMAL|EDGE_CRITICAL))
|
|
|
|
|
abort ();
|
|
|
|
|
|
|
|
|
|
if (e->insns == NULL_RTX)
|
|
|
|
|
start_sequence ();
|
|
|
|
|
else
|
|
|
|
|
push_to_sequence (e->insns);
|
|
|
|
|
|
|
|
|
|
emit_insn (pattern);
|
|
|
|
|
|
|
|
|
|
e->insns = get_insns ();
|
|
|
|
|
end_sequence();
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Update the CFG for the instructions queued on edge E. */
|
|
|
|
|
|
|
|
|
|
static void
|
|
|
|
|
commit_one_edge_insertion (e)
|
|
|
|
|
edge e;
|
|
|
|
|
{
|
|
|
|
|
rtx before = NULL_RTX, after = NULL_RTX, tmp;
|
|
|
|
|
basic_block bb;
|
|
|
|
|
|
|
|
|
|
/* Figure out where to put these things. If the destination has
|
|
|
|
|
one predecessor, insert there. Except for the exit block. */
|
|
|
|
|
if (e->dest->pred->pred_next == NULL
|
|
|
|
|
&& e->dest != EXIT_BLOCK_PTR)
|
|
|
|
|
{
|
|
|
|
|
bb = e->dest;
|
|
|
|
|
|
|
|
|
|
/* Get the location correct wrt a code label, and "nice" wrt
|
|
|
|
|
a basic block note, and before everything else. */
|
|
|
|
|
tmp = bb->head;
|
|
|
|
|
if (GET_CODE (tmp) == CODE_LABEL)
|
|
|
|
|
tmp = NEXT_INSN (tmp);
|
|
|
|
|
if (GET_CODE (tmp) == NOTE
|
|
|
|
|
&& NOTE_LINE_NUMBER (tmp) == NOTE_INSN_BASIC_BLOCK)
|
|
|
|
|
tmp = NEXT_INSN (tmp);
|
|
|
|
|
if (tmp == bb->head)
|
|
|
|
|
before = tmp;
|
|
|
|
|
else
|
|
|
|
|
after = PREV_INSN (tmp);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* If the source has one successor and the edge is not abnormal,
|
|
|
|
|
insert there. Except for the entry block. */
|
|
|
|
|
else if ((e->flags & EDGE_ABNORMAL) == 0
|
|
|
|
|
&& e->src->succ->succ_next == NULL
|
|
|
|
|
&& e->src != ENTRY_BLOCK_PTR)
|
|
|
|
|
{
|
|
|
|
|
bb = e->src;
|
|
|
|
|
if (GET_CODE (bb->end) == JUMP_INSN)
|
|
|
|
|
{
|
|
|
|
|
/* ??? Is it possible to wind up with non-simple jumps? Perhaps
|
|
|
|
|
a jump with delay slots already filled? */
|
|
|
|
|
if (! simplejump_p (bb->end))
|
|
|
|
|
abort ();
|
|
|
|
|
|
|
|
|
|
before = bb->end;
|
|
|
|
|
}
|
|
|
|
|
else
|
|
|
|
|
{
|
|
|
|
|
/* We'd better be fallthru, or we've lost track of what's what. */
|
|
|
|
|
if ((e->flags & EDGE_FALLTHRU) == 0)
|
|
|
|
|
abort ();
|
|
|
|
|
|
|
|
|
|
after = bb->end;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Otherwise we must split the edge. */
|
|
|
|
|
else
|
|
|
|
|
{
|
|
|
|
|
bb = split_edge (e);
|
|
|
|
|
after = bb->end;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Now that we've found the spot, do the insertion. */
|
|
|
|
|
tmp = e->insns;
|
|
|
|
|
e->insns = NULL_RTX;
|
1999-08-10 16:46:16 +02:00
|
|
|
|
|
|
|
|
|
/* Set the new block number for these insns, if structure is allocated. */
|
|
|
|
|
if (basic_block_for_insn)
|
|
|
|
|
{
|
|
|
|
|
rtx i;
|
|
|
|
|
for (i = tmp; i != NULL_RTX; i = NEXT_INSN (i))
|
|
|
|
|
set_block_for_insn (i, bb);
|
|
|
|
|
}
|
|
|
|
|
|
1999-02-26 00:45:42 +01:00
|
|
|
|
if (before)
|
|
|
|
|
{
|
|
|
|
|
emit_insns_before (tmp, before);
|
|
|
|
|
if (before == bb->head)
|
1999-08-10 16:46:16 +02:00
|
|
|
|
bb->head = tmp;
|
1999-02-26 00:45:42 +01:00
|
|
|
|
}
|
|
|
|
|
else
|
|
|
|
|
{
|
|
|
|
|
tmp = emit_insns_after (tmp, after);
|
|
|
|
|
if (after == bb->end)
|
|
|
|
|
bb->end = tmp;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Update the CFG for all queued instructions. */
|
|
|
|
|
|
|
|
|
|
void
|
|
|
|
|
commit_edge_insertions ()
|
|
|
|
|
{
|
|
|
|
|
int i;
|
|
|
|
|
basic_block bb;
|
|
|
|
|
|
|
|
|
|
i = -1;
|
|
|
|
|
bb = ENTRY_BLOCK_PTR;
|
|
|
|
|
while (1)
|
|
|
|
|
{
|
|
|
|
|
edge e, next;
|
|
|
|
|
|
|
|
|
|
for (e = bb->succ; e ; e = next)
|
|
|
|
|
{
|
|
|
|
|
next = e->succ_next;
|
|
|
|
|
if (e->insns)
|
|
|
|
|
commit_one_edge_insertion (e);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (++i >= n_basic_blocks)
|
|
|
|
|
break;
|
|
|
|
|
bb = BASIC_BLOCK (i);
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Delete all unreachable basic blocks. */
|
|
|
|
|
|
|
|
|
|
static void
|
|
|
|
|
delete_unreachable_blocks ()
|
|
|
|
|
{
|
|
|
|
|
basic_block *worklist, *tos;
|
|
|
|
|
int deleted_handler;
|
|
|
|
|
edge e;
|
|
|
|
|
int i, n;
|
|
|
|
|
|
|
|
|
|
n = n_basic_blocks;
|
1999-11-02 00:19:44 +01:00
|
|
|
|
tos = worklist = (basic_block *) xmalloc (sizeof (basic_block) * n);
|
1999-02-26 00:45:42 +01:00
|
|
|
|
|
|
|
|
|
/* Use basic_block->aux as a marker. Clear them all. */
|
|
|
|
|
|
|
|
|
|
for (i = 0; i < n; ++i)
|
|
|
|
|
BASIC_BLOCK (i)->aux = NULL;
|
|
|
|
|
|
|
|
|
|
/* Add our starting points to the worklist. Almost always there will
|
|
|
|
|
be only one. It isn't inconcievable that we might one day directly
|
|
|
|
|
support Fortran alternate entry points. */
|
|
|
|
|
|
|
|
|
|
for (e = ENTRY_BLOCK_PTR->succ; e ; e = e->succ_next)
|
1999-03-04 16:01:06 +01:00
|
|
|
|
{
|
|
|
|
|
*tos++ = e->dest;
|
|
|
|
|
|
|
|
|
|
/* Mark the block with a handy non-null value. */
|
|
|
|
|
e->dest->aux = e;
|
|
|
|
|
}
|
1999-02-26 00:45:42 +01:00
|
|
|
|
|
|
|
|
|
/* Iterate: find everything reachable from what we've already seen. */
|
|
|
|
|
|
|
|
|
|
while (tos != worklist)
|
|
|
|
|
{
|
|
|
|
|
basic_block b = *--tos;
|
|
|
|
|
|
|
|
|
|
for (e = b->succ; e ; e = e->succ_next)
|
|
|
|
|
if (!e->dest->aux)
|
1999-03-04 16:01:06 +01:00
|
|
|
|
{
|
|
|
|
|
*tos++ = e->dest;
|
|
|
|
|
e->dest->aux = e;
|
|
|
|
|
}
|
1999-02-26 00:45:42 +01:00
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Delete all unreachable basic blocks. Count down so that we don't
|
|
|
|
|
interfere with the block renumbering that happens in delete_block. */
|
|
|
|
|
|
|
|
|
|
deleted_handler = 0;
|
|
|
|
|
|
|
|
|
|
for (i = n - 1; i >= 0; --i)
|
|
|
|
|
{
|
|
|
|
|
basic_block b = BASIC_BLOCK (i);
|
|
|
|
|
|
|
|
|
|
if (b->aux != NULL)
|
|
|
|
|
/* This block was found. Tidy up the mark. */
|
|
|
|
|
b->aux = NULL;
|
|
|
|
|
else
|
|
|
|
|
deleted_handler |= delete_block (b);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Fix up edges that now fall through, or rather should now fall through
|
|
|
|
|
but previously required a jump around now deleted blocks. Simplify
|
|
|
|
|
the search by only examining blocks numerically adjacent, since this
|
|
|
|
|
is how find_basic_blocks created them. */
|
|
|
|
|
|
|
|
|
|
for (i = 1; i < n_basic_blocks; ++i)
|
|
|
|
|
{
|
|
|
|
|
basic_block b = BASIC_BLOCK (i - 1);
|
|
|
|
|
basic_block c = BASIC_BLOCK (i);
|
|
|
|
|
edge s;
|
|
|
|
|
|
1999-04-09 03:23:05 +02:00
|
|
|
|
/* We care about simple conditional or unconditional jumps with
|
|
|
|
|
a single successor.
|
|
|
|
|
|
|
|
|
|
If we had a conditional branch to the next instruction when
|
|
|
|
|
find_basic_blocks was called, then there will only be one
|
|
|
|
|
out edge for the block which ended with the conditional
|
|
|
|
|
branch (since we do not create duplicate edges).
|
|
|
|
|
|
1999-04-09 22:15:39 +02:00
|
|
|
|
Furthermore, the edge will be marked as a fallthru because we
|
|
|
|
|
merge the flags for the duplicate edges. So we do not want to
|
|
|
|
|
check that the edge is not a FALLTHRU edge. */
|
1999-02-26 00:45:42 +01:00
|
|
|
|
if ((s = b->succ) != NULL
|
|
|
|
|
&& s->succ_next == NULL
|
1999-08-04 09:11:26 +02:00
|
|
|
|
&& s->dest == c
|
1999-08-07 20:36:15 +02:00
|
|
|
|
/* If the jump insn has side effects, we can't tidy the edge. */
|
|
|
|
|
&& (GET_CODE (b->end) != JUMP_INSN
|
|
|
|
|
|| onlyjump_p (b->end)))
|
1999-02-26 00:45:42 +01:00
|
|
|
|
tidy_fallthru_edge (s, b, c);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* If we deleted an exception handler, we may have EH region begin/end
|
|
|
|
|
blocks to remove as well. */
|
|
|
|
|
if (deleted_handler)
|
|
|
|
|
delete_eh_regions ();
|
1999-11-02 00:19:44 +01:00
|
|
|
|
|
|
|
|
|
free (worklist);
|
1999-02-26 00:45:42 +01:00
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Find EH regions for which there is no longer a handler, and delete them. */
|
|
|
|
|
|
|
|
|
|
static void
|
|
|
|
|
delete_eh_regions ()
|
|
|
|
|
{
|
|
|
|
|
rtx insn;
|
|
|
|
|
|
1999-08-10 18:19:16 +02:00
|
|
|
|
update_rethrow_references ();
|
|
|
|
|
|
1999-02-26 00:45:42 +01:00
|
|
|
|
for (insn = get_insns (); insn; insn = NEXT_INSN (insn))
|
|
|
|
|
if (GET_CODE (insn) == NOTE)
|
|
|
|
|
{
|
|
|
|
|
if ((NOTE_LINE_NUMBER (insn) == NOTE_INSN_EH_REGION_BEG) ||
|
|
|
|
|
(NOTE_LINE_NUMBER (insn) == NOTE_INSN_EH_REGION_END))
|
|
|
|
|
{
|
rtl.h (RTL_CHECK1, RTL_CHECK2): New macros which type- and bounds- check RTL accesses if --enable-checking.
1999-08-31 12:20 -0700 Zack Weinberg <zack@bitmover.com>
* rtl.h (RTL_CHECK1, RTL_CHECK2): New macros which type- and
bounds- check RTL accesses if --enable-checking.
(RTVEC_ELT): Bounds check if --enable-checking.
(XWINT, XINT, XSTR, XEXP, XVEC, XMODE, XBITMAP, XTREE,
XBBDEF): Use RTL_CHECK1/RTL_CHECK2 as appropriate.
(XVECEXP, XVECLEN): Define in terms of XVEC, RTVEC_ELT, and
GET_NUM_ELEM.
(X0WINT, X0INT, X0STR, X0EXP, X0VEC, X0MODE, X0BITMAP, X0TREE,
X0BBDEF, X0ADVFLAGS): New macros for accessing '0' slots of RTXes.
(ADDR_DIFF_VEC_FLAGS): Use X0ADVFLAGS.
(NOTE_SOURCE_FILE): Use X0STR.
(NOTE_BLOCK_NUMBER, NOTE_EH_HANDLER, LABEL_NUSES,
MEM_ALIAS_SET): Use X0INT.
(NOTE_RANGE_INFO, NOTE_LIVE_INFO, NOTE_BASIC_BLOCK,
JUMP_LABEL, LABEL_REFS, LABEL_NEXTREF, CONTAINING_INSN):
Use X0EXP.
* real.h (CONST_DOUBLE_CHAIN): Use X0EXP.
* rtl.c (copy_rtx, copy_most_rtx): Copy '0' slots with X0WINT.
(rtl_check_failed_bounds, rtl_check_failed_type1,
rtl_check_failed_type2, rtvec_check_failed_bounds): New
functions.
(fancy_abort): Fix comment.
* cse.c (canon_hash): Read CONST_DOUBLE data slots with XWINT.
(cse_insn): Decrement LABEL_NUSES for jump target before
deleting jump insn.
* emit-rtl.c (gen_rtx_CONST_DOUBLE): Use X0EXP for slot 1.
* final.c (alter_subreg): Compute regno before changing x to
REG; set REGNO(x) after changing it.
* flow.c (count_basic_blocks): Use XWINT to inspect EH_REGION
notes containing CONST_INTs.
(delete_eh_regions): Use NOTE_EH_HANDLER.
* function.c (put_reg_into_stack): Make reg a MEM before
initializing it.
(fixup_var_refs_insns): Save REG_NOTES (insn) in case we
delete insn.
(gen_mem_addressof): Make reg a MEM before initializing it.
* integrate.c (copy_rtx_and_substitute): Copy '0' slots with
X0WINT.
* local-alloc.c (update_equiv_regs): Zap REG_NOTES before
deleting an insn, not after.
(block_alloc): Only look at PATTERN(insn) if we have to, and
only if it's format class 'i'.
* loop.c (check_dbra_loop): Check bl->biv->add_val is a
CONST_INT before using its INTVAL.
* print-rtl.c (print_rtx): Use X0STR.
* regmove.c (fixup_match_1): Don't look at PATTERN of
non-class-'i' insn chain elements.
* reload.c (loc_mentioned_in_p): Take address of
in->fld[1].rtx directly.
* reload1.c (reload): Change reg to a MEM before initializing
it.
* varasm.c (mark_constant_pool): Skip CONST_DOUBLES, which
have no names.
* config/i386/i386.md (decrement_and_branch_if_zero): Fix typo.
From-SVN: r29008
1999-08-31 21:39:10 +02:00
|
|
|
|
int num = NOTE_EH_HANDLER (insn);
|
1999-08-10 18:19:16 +02:00
|
|
|
|
/* A NULL handler indicates a region is no longer needed,
|
|
|
|
|
as long as it isn't the target of a rethrow. */
|
|
|
|
|
if (get_first_handler (num) == NULL && ! rethrow_used (num))
|
1999-02-26 00:45:42 +01:00
|
|
|
|
{
|
|
|
|
|
NOTE_LINE_NUMBER (insn) = NOTE_INSN_DELETED;
|
|
|
|
|
NOTE_SOURCE_FILE (insn) = 0;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Return true if NOTE is not one of the ones that must be kept paired,
|
|
|
|
|
so that we may simply delete them. */
|
|
|
|
|
|
|
|
|
|
static int
|
1999-04-06 17:45:55 +02:00
|
|
|
|
can_delete_note_p (note)
|
1999-02-26 00:45:42 +01:00
|
|
|
|
rtx note;
|
|
|
|
|
{
|
|
|
|
|
return (NOTE_LINE_NUMBER (note) == NOTE_INSN_DELETED
|
|
|
|
|
|| NOTE_LINE_NUMBER (note) == NOTE_INSN_BASIC_BLOCK);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Unlink a chain of insns between START and FINISH, leaving notes
|
|
|
|
|
that must be paired. */
|
|
|
|
|
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
void
|
1999-08-29 01:29:55 +02:00
|
|
|
|
flow_delete_insn_chain (start, finish)
|
1999-02-26 00:45:42 +01:00
|
|
|
|
rtx start, finish;
|
|
|
|
|
{
|
|
|
|
|
/* Unchain the insns one by one. It would be quicker to delete all
|
|
|
|
|
of these with a single unchaining, rather than one at a time, but
|
|
|
|
|
we need to keep the NOTE's. */
|
|
|
|
|
|
|
|
|
|
rtx next;
|
|
|
|
|
|
|
|
|
|
while (1)
|
|
|
|
|
{
|
|
|
|
|
next = NEXT_INSN (start);
|
1999-04-06 17:45:55 +02:00
|
|
|
|
if (GET_CODE (start) == NOTE && !can_delete_note_p (start))
|
|
|
|
|
;
|
|
|
|
|
else if (GET_CODE (start) == CODE_LABEL && !can_delete_label_p (start))
|
|
|
|
|
;
|
|
|
|
|
else
|
1999-02-26 00:45:42 +01:00
|
|
|
|
next = flow_delete_insn (start);
|
|
|
|
|
|
|
|
|
|
if (start == finish)
|
|
|
|
|
break;
|
|
|
|
|
start = next;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Delete the insns in a (non-live) block. We physically delete every
|
|
|
|
|
non-deleted-note insn, and update the flow graph appropriately.
|
|
|
|
|
|
|
|
|
|
Return nonzero if we deleted an exception handler. */
|
|
|
|
|
|
|
|
|
|
/* ??? Preserving all such notes strikes me as wrong. It would be nice
|
|
|
|
|
to post-process the stream to remove empty blocks, loops, ranges, etc. */
|
|
|
|
|
|
|
|
|
|
static int
|
|
|
|
|
delete_block (b)
|
|
|
|
|
basic_block b;
|
|
|
|
|
{
|
|
|
|
|
int deleted_handler = 0;
|
|
|
|
|
rtx insn, end;
|
|
|
|
|
|
|
|
|
|
/* If the head of this block is a CODE_LABEL, then it might be the
|
|
|
|
|
label for an exception handler which can't be reached.
|
|
|
|
|
|
|
|
|
|
We need to remove the label from the exception_handler_label list
|
1999-08-25 08:44:46 +02:00
|
|
|
|
and remove the associated NOTE_INSN_EH_REGION_BEG and
|
|
|
|
|
NOTE_INSN_EH_REGION_END notes. */
|
1999-02-26 00:45:42 +01:00
|
|
|
|
|
|
|
|
|
insn = b->head;
|
1999-03-21 13:14:09 +01:00
|
|
|
|
|
1999-08-18 12:43:26 +02:00
|
|
|
|
never_reached_warning (insn);
|
|
|
|
|
|
1999-02-26 00:45:42 +01:00
|
|
|
|
if (GET_CODE (insn) == CODE_LABEL)
|
|
|
|
|
{
|
|
|
|
|
rtx x, *prev = &exception_handler_labels;
|
|
|
|
|
|
|
|
|
|
for (x = exception_handler_labels; x; x = XEXP (x, 1))
|
|
|
|
|
{
|
|
|
|
|
if (XEXP (x, 0) == insn)
|
|
|
|
|
{
|
|
|
|
|
/* Found a match, splice this label out of the EH label list. */
|
|
|
|
|
*prev = XEXP (x, 1);
|
|
|
|
|
XEXP (x, 1) = NULL_RTX;
|
|
|
|
|
XEXP (x, 0) = NULL_RTX;
|
|
|
|
|
|
|
|
|
|
/* Remove the handler from all regions */
|
|
|
|
|
remove_handler (insn);
|
|
|
|
|
deleted_handler = 1;
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
prev = &XEXP (x, 1);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* This label may be referenced by code solely for its value, or
|
|
|
|
|
referenced by static data, or something. We have determined
|
|
|
|
|
that it is not reachable, but cannot delete the label itself.
|
|
|
|
|
Save code space and continue to delete the balance of the block,
|
|
|
|
|
along with properly updating the cfg. */
|
|
|
|
|
if (!can_delete_label_p (insn))
|
|
|
|
|
{
|
|
|
|
|
/* If we've only got one of these, skip the whole deleting
|
|
|
|
|
insns thing. */
|
|
|
|
|
if (insn == b->end)
|
|
|
|
|
goto no_delete_insns;
|
|
|
|
|
insn = NEXT_INSN (insn);
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Selectively unlink the insn chain. Include any BARRIER that may
|
|
|
|
|
follow the basic block. */
|
|
|
|
|
end = next_nonnote_insn (b->end);
|
|
|
|
|
if (!end || GET_CODE (end) != BARRIER)
|
|
|
|
|
end = b->end;
|
1999-08-29 01:29:55 +02:00
|
|
|
|
flow_delete_insn_chain (insn, end);
|
1999-02-26 00:45:42 +01:00
|
|
|
|
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
no_delete_insns:
|
1999-02-26 00:45:42 +01:00
|
|
|
|
|
|
|
|
|
/* Remove the edges into and out of this block. Note that there may
|
|
|
|
|
indeed be edges in, if we are removing an unreachable loop. */
|
|
|
|
|
{
|
|
|
|
|
edge e, next, *q;
|
|
|
|
|
|
|
|
|
|
for (e = b->pred; e ; e = next)
|
|
|
|
|
{
|
|
|
|
|
for (q = &e->src->succ; *q != e; q = &(*q)->succ_next)
|
|
|
|
|
continue;
|
|
|
|
|
*q = e->succ_next;
|
|
|
|
|
next = e->pred_next;
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
n_edges--;
|
1999-02-26 00:45:42 +01:00
|
|
|
|
free (e);
|
|
|
|
|
}
|
|
|
|
|
for (e = b->succ; e ; e = next)
|
|
|
|
|
{
|
|
|
|
|
for (q = &e->dest->pred; *q != e; q = &(*q)->pred_next)
|
|
|
|
|
continue;
|
|
|
|
|
*q = e->pred_next;
|
|
|
|
|
next = e->succ_next;
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
n_edges--;
|
1999-02-26 00:45:42 +01:00
|
|
|
|
free (e);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
b->pred = NULL;
|
|
|
|
|
b->succ = NULL;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Remove the basic block from the array, and compact behind it. */
|
|
|
|
|
expunge_block (b);
|
|
|
|
|
|
|
|
|
|
return deleted_handler;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Remove block B from the basic block array and compact behind it. */
|
|
|
|
|
|
|
|
|
|
static void
|
|
|
|
|
expunge_block (b)
|
|
|
|
|
basic_block b;
|
|
|
|
|
{
|
|
|
|
|
int i, n = n_basic_blocks;
|
|
|
|
|
|
|
|
|
|
for (i = b->index; i + 1 < n; ++i)
|
|
|
|
|
{
|
|
|
|
|
basic_block x = BASIC_BLOCK (i + 1);
|
|
|
|
|
BASIC_BLOCK (i) = x;
|
|
|
|
|
x->index = i;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
basic_block_info->num_elements--;
|
|
|
|
|
n_basic_blocks--;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Delete INSN by patching it out. Return the next insn. */
|
|
|
|
|
|
|
|
|
|
static rtx
|
|
|
|
|
flow_delete_insn (insn)
|
|
|
|
|
rtx insn;
|
|
|
|
|
{
|
|
|
|
|
rtx prev = PREV_INSN (insn);
|
|
|
|
|
rtx next = NEXT_INSN (insn);
|
|
|
|
|
|
|
|
|
|
PREV_INSN (insn) = NULL_RTX;
|
|
|
|
|
NEXT_INSN (insn) = NULL_RTX;
|
|
|
|
|
|
|
|
|
|
if (prev)
|
|
|
|
|
NEXT_INSN (prev) = next;
|
|
|
|
|
if (next)
|
|
|
|
|
PREV_INSN (next) = prev;
|
|
|
|
|
else
|
|
|
|
|
set_last_insn (prev);
|
1998-12-08 15:04:03 +01:00
|
|
|
|
|
1999-04-12 04:18:55 +02:00
|
|
|
|
if (GET_CODE (insn) == CODE_LABEL)
|
|
|
|
|
remove_node_from_expr_list (insn, &nonlocal_goto_handler_labels);
|
|
|
|
|
|
1999-02-26 00:45:42 +01:00
|
|
|
|
/* If deleting a jump, decrement the use count of the label. Deleting
|
|
|
|
|
the label itself should happen in the normal course of block merging. */
|
|
|
|
|
if (GET_CODE (insn) == JUMP_INSN && JUMP_LABEL (insn))
|
|
|
|
|
LABEL_NUSES (JUMP_LABEL (insn))--;
|
|
|
|
|
|
|
|
|
|
return next;
|
1992-01-15 22:33:30 +01:00
|
|
|
|
}
|
1994-11-15 16:38:07 +01:00
|
|
|
|
|
1999-02-26 00:45:42 +01:00
|
|
|
|
/* True if a given label can be deleted. */
|
|
|
|
|
|
|
|
|
|
static int
|
|
|
|
|
can_delete_label_p (label)
|
|
|
|
|
rtx label;
|
flow.c (life_analysis_1): Break out some functions.
Fri Oct 9 15:57:51 1998 Bernd Schmidt <crux@Pool.Informatik.RWTH-Aachen.DE>
* flow.c (life_analysis_1): Break out some functions.
(find_basic_blocks_1): Likewise. Also move some variables out and
make them static.
Rename NONLOCAL_LABEL_LIST arg to NONLOCAL_LABELS and initialize
new static var nonlocal_label_list with it.
(active_eh_region, nested_eh_region, label_value_list,
nonlocal_label_list): New static variables.
(make_edges, delete_unreachable_blocks, delete_block): New static
functions, broken out of find_basic_blocks_1.
(record_volatile_insns, mark_regs_live_at_end, set_noop_p,
noop_move_p): New static functions, broken out of life_analysis_1.
From-SVN: r22963
1998-10-09 17:58:37 +02:00
|
|
|
|
{
|
1999-02-26 00:45:42 +01:00
|
|
|
|
rtx x;
|
flow.c (life_analysis_1): Break out some functions.
Fri Oct 9 15:57:51 1998 Bernd Schmidt <crux@Pool.Informatik.RWTH-Aachen.DE>
* flow.c (life_analysis_1): Break out some functions.
(find_basic_blocks_1): Likewise. Also move some variables out and
make them static.
Rename NONLOCAL_LABEL_LIST arg to NONLOCAL_LABELS and initialize
new static var nonlocal_label_list with it.
(active_eh_region, nested_eh_region, label_value_list,
nonlocal_label_list): New static variables.
(make_edges, delete_unreachable_blocks, delete_block): New static
functions, broken out of find_basic_blocks_1.
(record_volatile_insns, mark_regs_live_at_end, set_noop_p,
noop_move_p): New static functions, broken out of life_analysis_1.
From-SVN: r22963
1998-10-09 17:58:37 +02:00
|
|
|
|
|
1999-02-26 00:45:42 +01:00
|
|
|
|
if (LABEL_PRESERVE_P (label))
|
|
|
|
|
return 0;
|
1998-10-30 00:18:51 +01:00
|
|
|
|
|
1999-02-26 00:45:42 +01:00
|
|
|
|
for (x = forced_labels; x ; x = XEXP (x, 1))
|
|
|
|
|
if (label == XEXP (x, 0))
|
|
|
|
|
return 0;
|
|
|
|
|
for (x = label_value_list; x ; x = XEXP (x, 1))
|
|
|
|
|
if (label == XEXP (x, 0))
|
|
|
|
|
return 0;
|
|
|
|
|
for (x = exception_handler_labels; x ; x = XEXP (x, 1))
|
|
|
|
|
if (label == XEXP (x, 0))
|
|
|
|
|
return 0;
|
flow.c (life_analysis_1): Break out some functions.
Fri Oct 9 15:57:51 1998 Bernd Schmidt <crux@Pool.Informatik.RWTH-Aachen.DE>
* flow.c (life_analysis_1): Break out some functions.
(find_basic_blocks_1): Likewise. Also move some variables out and
make them static.
Rename NONLOCAL_LABEL_LIST arg to NONLOCAL_LABELS and initialize
new static var nonlocal_label_list with it.
(active_eh_region, nested_eh_region, label_value_list,
nonlocal_label_list): New static variables.
(make_edges, delete_unreachable_blocks, delete_block): New static
functions, broken out of find_basic_blocks_1.
(record_volatile_insns, mark_regs_live_at_end, set_noop_p,
noop_move_p): New static functions, broken out of life_analysis_1.
From-SVN: r22963
1998-10-09 17:58:37 +02:00
|
|
|
|
|
1999-04-09 03:23:05 +02:00
|
|
|
|
/* User declared labels must be preserved. */
|
1999-03-21 13:14:09 +01:00
|
|
|
|
if (LABEL_NAME (label) != 0)
|
1999-04-09 03:23:05 +02:00
|
|
|
|
return 0;
|
1999-03-21 13:14:09 +01:00
|
|
|
|
|
1999-02-26 00:45:42 +01:00
|
|
|
|
return 1;
|
|
|
|
|
}
|
1998-10-30 00:18:51 +01:00
|
|
|
|
|
1999-09-20 14:34:26 +02:00
|
|
|
|
/* Blocks A and B are to be merged into a single block. A has no incoming
|
|
|
|
|
fallthru edge, so it can be moved before B without adding or modifying
|
|
|
|
|
any jumps (aside from the jump from A to B). */
|
|
|
|
|
|
|
|
|
|
static int
|
1999-09-21 23:15:37 +02:00
|
|
|
|
merge_blocks_move_predecessor_nojumps (a, b)
|
1999-09-20 14:34:26 +02:00
|
|
|
|
basic_block a, b;
|
|
|
|
|
{
|
1999-10-27 05:24:24 +02:00
|
|
|
|
rtx start, end, barrier;
|
1999-10-20 14:39:01 +02:00
|
|
|
|
int index;
|
1999-09-20 14:34:26 +02:00
|
|
|
|
|
|
|
|
|
start = a->head;
|
|
|
|
|
end = a->end;
|
|
|
|
|
|
|
|
|
|
/* We want to delete the BARRIER after the end of the insns we are
|
|
|
|
|
going to move. If we don't find a BARRIER, then do nothing. This
|
|
|
|
|
can happen in some cases if we have labels we can not delete.
|
|
|
|
|
|
|
|
|
|
Similarly, do nothing if we can not delete the label at the start
|
|
|
|
|
of the target block. */
|
|
|
|
|
barrier = next_nonnote_insn (end);
|
|
|
|
|
if (GET_CODE (barrier) != BARRIER
|
|
|
|
|
|| (GET_CODE (b->head) == CODE_LABEL
|
|
|
|
|
&& ! can_delete_label_p (b->head)))
|
|
|
|
|
return 0;
|
|
|
|
|
else
|
|
|
|
|
flow_delete_insn (barrier);
|
|
|
|
|
|
|
|
|
|
/* Move block and loop notes out of the chain so that we do not
|
|
|
|
|
disturb their order.
|
|
|
|
|
|
|
|
|
|
??? A better solution would be to squeeze out all the non-nested notes
|
|
|
|
|
and adjust the block trees appropriately. Even better would be to have
|
|
|
|
|
a tighter connection between block trees and rtl so that this is not
|
|
|
|
|
necessary. */
|
|
|
|
|
start = squeeze_notes (start, end);
|
|
|
|
|
|
|
|
|
|
/* Scramble the insn chain. */
|
1999-10-27 05:24:24 +02:00
|
|
|
|
if (end != PREV_INSN (b->head))
|
|
|
|
|
reorder_insns (start, end, PREV_INSN (b->head));
|
1999-09-20 14:34:26 +02:00
|
|
|
|
|
1999-09-21 23:15:37 +02:00
|
|
|
|
if (rtl_dump_file)
|
|
|
|
|
{
|
|
|
|
|
fprintf (rtl_dump_file, "Moved block %d before %d and merged.\n",
|
|
|
|
|
a->index, b->index);
|
|
|
|
|
}
|
|
|
|
|
|
1999-10-20 14:39:01 +02:00
|
|
|
|
/* Swap the records for the two blocks around. Although we are deleting B,
|
|
|
|
|
A is now where B was and we want to compact the BB array from where
|
|
|
|
|
A used to be. */
|
|
|
|
|
BASIC_BLOCK(a->index) = b;
|
|
|
|
|
BASIC_BLOCK(b->index) = a;
|
|
|
|
|
index = a->index;
|
|
|
|
|
a->index = b->index;
|
|
|
|
|
b->index = index;
|
|
|
|
|
|
|
|
|
|
/* Now blocks A and B are contiguous. Merge them. */
|
|
|
|
|
merge_blocks_nomove (a, b);
|
|
|
|
|
|
1999-09-20 14:34:26 +02:00
|
|
|
|
return 1;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Blocks A and B are to be merged into a single block. B has no outgoing
|
|
|
|
|
fallthru edge, so it can be moved after A without adding or modifying
|
|
|
|
|
any jumps (aside from the jump from A to B). */
|
|
|
|
|
|
|
|
|
|
static int
|
1999-09-21 23:15:37 +02:00
|
|
|
|
merge_blocks_move_successor_nojumps (a, b)
|
1999-09-20 14:34:26 +02:00
|
|
|
|
basic_block a, b;
|
|
|
|
|
{
|
1999-10-27 05:24:24 +02:00
|
|
|
|
rtx start, end, barrier;
|
1999-09-20 14:34:26 +02:00
|
|
|
|
|
|
|
|
|
start = b->head;
|
|
|
|
|
end = b->end;
|
|
|
|
|
|
1999-09-21 16:47:23 +02:00
|
|
|
|
/* We want to delete the BARRIER after the end of the insns we are
|
1999-09-20 14:34:26 +02:00
|
|
|
|
going to move. If we don't find a BARRIER, then do nothing. This
|
1999-09-21 16:47:23 +02:00
|
|
|
|
can happen in some cases if we have labels we can not delete.
|
|
|
|
|
|
|
|
|
|
Similarly, do nothing if we can not delete the label at the start
|
|
|
|
|
of the target block. */
|
|
|
|
|
barrier = next_nonnote_insn (end);
|
1999-09-20 14:34:26 +02:00
|
|
|
|
if (GET_CODE (barrier) != BARRIER
|
|
|
|
|
|| (GET_CODE (b->head) == CODE_LABEL
|
|
|
|
|
&& ! can_delete_label_p (b->head)))
|
|
|
|
|
return 0;
|
|
|
|
|
else
|
|
|
|
|
flow_delete_insn (barrier);
|
|
|
|
|
|
|
|
|
|
/* Move block and loop notes out of the chain so that we do not
|
|
|
|
|
disturb their order.
|
|
|
|
|
|
|
|
|
|
??? A better solution would be to squeeze out all the non-nested notes
|
|
|
|
|
and adjust the block trees appropriately. Even better would be to have
|
|
|
|
|
a tighter connection between block trees and rtl so that this is not
|
|
|
|
|
necessary. */
|
|
|
|
|
start = squeeze_notes (start, end);
|
|
|
|
|
|
|
|
|
|
/* Scramble the insn chain. */
|
1999-10-27 05:24:24 +02:00
|
|
|
|
reorder_insns (start, end, a->end);
|
1999-09-20 14:34:26 +02:00
|
|
|
|
|
|
|
|
|
/* Now blocks A and B are contiguous. Merge them. */
|
|
|
|
|
merge_blocks_nomove (a, b);
|
1999-09-21 23:15:37 +02:00
|
|
|
|
|
|
|
|
|
if (rtl_dump_file)
|
|
|
|
|
{
|
|
|
|
|
fprintf (rtl_dump_file, "Moved block %d after %d and merged.\n",
|
|
|
|
|
b->index, a->index);
|
|
|
|
|
}
|
|
|
|
|
|
1999-09-20 14:34:26 +02:00
|
|
|
|
return 1;
|
|
|
|
|
}
|
|
|
|
|
|
1999-02-26 00:45:42 +01:00
|
|
|
|
/* Blocks A and B are to be merged into a single block. The insns
|
|
|
|
|
are already contiguous, hence `nomove'. */
|
1998-10-30 00:18:51 +01:00
|
|
|
|
|
1999-02-26 00:45:42 +01:00
|
|
|
|
static void
|
|
|
|
|
merge_blocks_nomove (a, b)
|
|
|
|
|
basic_block a, b;
|
|
|
|
|
{
|
|
|
|
|
edge e;
|
1999-04-10 23:06:47 +02:00
|
|
|
|
rtx b_head, b_end, a_end;
|
|
|
|
|
int b_empty = 0;
|
|
|
|
|
|
|
|
|
|
/* If there was a CODE_LABEL beginning B, delete it. */
|
|
|
|
|
b_head = b->head;
|
|
|
|
|
b_end = b->end;
|
|
|
|
|
if (GET_CODE (b_head) == CODE_LABEL)
|
|
|
|
|
{
|
|
|
|
|
/* Detect basic blocks with nothing but a label. This can happen
|
|
|
|
|
in particular at the end of a function. */
|
|
|
|
|
if (b_head == b_end)
|
|
|
|
|
b_empty = 1;
|
|
|
|
|
b_head = flow_delete_insn (b_head);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Delete the basic block note. */
|
|
|
|
|
if (GET_CODE (b_head) == NOTE
|
|
|
|
|
&& NOTE_LINE_NUMBER (b_head) == NOTE_INSN_BASIC_BLOCK)
|
|
|
|
|
{
|
|
|
|
|
if (b_head == b_end)
|
|
|
|
|
b_empty = 1;
|
|
|
|
|
b_head = flow_delete_insn (b_head);
|
|
|
|
|
}
|
1998-10-30 00:18:51 +01:00
|
|
|
|
|
1999-02-26 00:45:42 +01:00
|
|
|
|
/* If there was a jump out of A, delete it. */
|
1999-04-10 23:06:47 +02:00
|
|
|
|
a_end = a->end;
|
|
|
|
|
if (GET_CODE (a_end) == JUMP_INSN)
|
1999-02-26 00:45:42 +01:00
|
|
|
|
{
|
1999-04-10 23:06:47 +02:00
|
|
|
|
rtx prev;
|
1999-03-08 15:40:47 +01:00
|
|
|
|
|
1999-04-10 23:06:47 +02:00
|
|
|
|
prev = prev_nonnote_insn (a_end);
|
|
|
|
|
if (!prev)
|
|
|
|
|
prev = a->head;
|
1999-03-08 15:40:47 +01:00
|
|
|
|
|
|
|
|
|
#ifdef HAVE_cc0
|
1999-04-10 23:06:47 +02:00
|
|
|
|
/* If this was a conditional jump, we need to also delete
|
|
|
|
|
the insn that set cc0. */
|
1999-03-08 15:40:47 +01:00
|
|
|
|
|
1999-04-10 23:06:47 +02:00
|
|
|
|
if (prev && sets_cc0_p (prev))
|
|
|
|
|
{
|
|
|
|
|
rtx tmp = prev;
|
|
|
|
|
prev = prev_nonnote_insn (prev);
|
|
|
|
|
if (!prev)
|
|
|
|
|
prev = a->head;
|
1999-02-26 00:45:42 +01:00
|
|
|
|
flow_delete_insn (tmp);
|
1998-10-30 00:18:51 +01:00
|
|
|
|
}
|
1999-04-10 23:06:47 +02:00
|
|
|
|
#endif
|
|
|
|
|
|
|
|
|
|
/* Note that a->head != a->end, since we should have at least a
|
|
|
|
|
bb note plus the jump, so prev != insn. */
|
|
|
|
|
flow_delete_insn (a_end);
|
|
|
|
|
a_end = prev;
|
1998-10-30 00:18:51 +01:00
|
|
|
|
}
|
|
|
|
|
|
1999-02-26 00:45:42 +01:00
|
|
|
|
/* By definition, there should only be one successor of A, and that is
|
|
|
|
|
B. Free that edge struct. */
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
n_edges--;
|
1999-02-26 00:45:42 +01:00
|
|
|
|
free (a->succ);
|
|
|
|
|
|
|
|
|
|
/* Adjust the edges out of B for the new owner. */
|
|
|
|
|
for (e = b->succ; e ; e = e->succ_next)
|
|
|
|
|
e->src = a;
|
|
|
|
|
a->succ = b->succ;
|
|
|
|
|
|
|
|
|
|
/* Reassociate the insns of B with A. */
|
1999-04-10 23:06:47 +02:00
|
|
|
|
if (!b_empty)
|
1999-02-26 00:45:42 +01:00
|
|
|
|
{
|
1999-04-10 23:06:47 +02:00
|
|
|
|
BLOCK_FOR_INSN (b_head) = a;
|
|
|
|
|
while (b_head != b_end)
|
flow.c (life_analysis_1): Break out some functions.
Fri Oct 9 15:57:51 1998 Bernd Schmidt <crux@Pool.Informatik.RWTH-Aachen.DE>
* flow.c (life_analysis_1): Break out some functions.
(find_basic_blocks_1): Likewise. Also move some variables out and
make them static.
Rename NONLOCAL_LABEL_LIST arg to NONLOCAL_LABELS and initialize
new static var nonlocal_label_list with it.
(active_eh_region, nested_eh_region, label_value_list,
nonlocal_label_list): New static variables.
(make_edges, delete_unreachable_blocks, delete_block): New static
functions, broken out of find_basic_blocks_1.
(record_volatile_insns, mark_regs_live_at_end, set_noop_p,
noop_move_p): New static functions, broken out of life_analysis_1.
From-SVN: r22963
1998-10-09 17:58:37 +02:00
|
|
|
|
{
|
1999-04-10 23:06:47 +02:00
|
|
|
|
b_head = NEXT_INSN (b_head);
|
|
|
|
|
BLOCK_FOR_INSN (b_head) = a;
|
flow.c (life_analysis_1): Break out some functions.
Fri Oct 9 15:57:51 1998 Bernd Schmidt <crux@Pool.Informatik.RWTH-Aachen.DE>
* flow.c (life_analysis_1): Break out some functions.
(find_basic_blocks_1): Likewise. Also move some variables out and
make them static.
Rename NONLOCAL_LABEL_LIST arg to NONLOCAL_LABELS and initialize
new static var nonlocal_label_list with it.
(active_eh_region, nested_eh_region, label_value_list,
nonlocal_label_list): New static variables.
(make_edges, delete_unreachable_blocks, delete_block): New static
functions, broken out of find_basic_blocks_1.
(record_volatile_insns, mark_regs_live_at_end, set_noop_p,
noop_move_p): New static functions, broken out of life_analysis_1.
From-SVN: r22963
1998-10-09 17:58:37 +02:00
|
|
|
|
}
|
1999-04-10 23:06:47 +02:00
|
|
|
|
a_end = b_head;
|
1999-02-26 00:45:42 +01:00
|
|
|
|
}
|
1999-04-10 23:06:47 +02:00
|
|
|
|
a->end = a_end;
|
1999-02-26 00:45:42 +01:00
|
|
|
|
|
|
|
|
|
/* Compact the basic block array. */
|
|
|
|
|
expunge_block (b);
|
flow.c (life_analysis_1): Break out some functions.
Fri Oct 9 15:57:51 1998 Bernd Schmidt <crux@Pool.Informatik.RWTH-Aachen.DE>
* flow.c (life_analysis_1): Break out some functions.
(find_basic_blocks_1): Likewise. Also move some variables out and
make them static.
Rename NONLOCAL_LABEL_LIST arg to NONLOCAL_LABELS and initialize
new static var nonlocal_label_list with it.
(active_eh_region, nested_eh_region, label_value_list,
nonlocal_label_list): New static variables.
(make_edges, delete_unreachable_blocks, delete_block): New static
functions, broken out of find_basic_blocks_1.
(record_volatile_insns, mark_regs_live_at_end, set_noop_p,
noop_move_p): New static functions, broken out of life_analysis_1.
From-SVN: r22963
1998-10-09 17:58:37 +02:00
|
|
|
|
}
|
|
|
|
|
|
1999-02-26 00:45:42 +01:00
|
|
|
|
/* Attempt to merge basic blocks that are potentially non-adjacent.
|
|
|
|
|
Return true iff the attempt succeeded. */
|
flow.c (life_analysis_1): Break out some functions.
Fri Oct 9 15:57:51 1998 Bernd Schmidt <crux@Pool.Informatik.RWTH-Aachen.DE>
* flow.c (life_analysis_1): Break out some functions.
(find_basic_blocks_1): Likewise. Also move some variables out and
make them static.
Rename NONLOCAL_LABEL_LIST arg to NONLOCAL_LABELS and initialize
new static var nonlocal_label_list with it.
(active_eh_region, nested_eh_region, label_value_list,
nonlocal_label_list): New static variables.
(make_edges, delete_unreachable_blocks, delete_block): New static
functions, broken out of find_basic_blocks_1.
(record_volatile_insns, mark_regs_live_at_end, set_noop_p,
noop_move_p): New static functions, broken out of life_analysis_1.
From-SVN: r22963
1998-10-09 17:58:37 +02:00
|
|
|
|
|
|
|
|
|
static int
|
1999-02-26 00:45:42 +01:00
|
|
|
|
merge_blocks (e, b, c)
|
|
|
|
|
edge e;
|
|
|
|
|
basic_block b, c;
|
flow.c (life_analysis_1): Break out some functions.
Fri Oct 9 15:57:51 1998 Bernd Schmidt <crux@Pool.Informatik.RWTH-Aachen.DE>
* flow.c (life_analysis_1): Break out some functions.
(find_basic_blocks_1): Likewise. Also move some variables out and
make them static.
Rename NONLOCAL_LABEL_LIST arg to NONLOCAL_LABELS and initialize
new static var nonlocal_label_list with it.
(active_eh_region, nested_eh_region, label_value_list,
nonlocal_label_list): New static variables.
(make_edges, delete_unreachable_blocks, delete_block): New static
functions, broken out of find_basic_blocks_1.
(record_volatile_insns, mark_regs_live_at_end, set_noop_p,
noop_move_p): New static functions, broken out of life_analysis_1.
From-SVN: r22963
1998-10-09 17:58:37 +02:00
|
|
|
|
{
|
1999-02-26 00:45:42 +01:00
|
|
|
|
/* If B has a fallthru edge to C, no need to move anything. */
|
1999-09-21 23:15:37 +02:00
|
|
|
|
if (e->flags & EDGE_FALLTHRU)
|
1999-02-26 00:45:42 +01:00
|
|
|
|
{
|
1999-09-21 23:15:37 +02:00
|
|
|
|
/* If a label still appears somewhere and we cannot delete the label,
|
|
|
|
|
then we cannot merge the blocks. The edge was tidied already. */
|
1999-09-20 14:34:26 +02:00
|
|
|
|
|
1999-09-21 23:15:37 +02:00
|
|
|
|
rtx insn, stop = NEXT_INSN (c->head);
|
|
|
|
|
for (insn = NEXT_INSN (b->end); insn != stop; insn = NEXT_INSN (insn))
|
|
|
|
|
if (GET_CODE (insn) == CODE_LABEL && !can_delete_label_p (insn))
|
|
|
|
|
return 0;
|
1999-09-20 14:34:26 +02:00
|
|
|
|
|
1999-09-21 23:15:37 +02:00
|
|
|
|
merge_blocks_nomove (b, c);
|
1999-09-20 14:34:26 +02:00
|
|
|
|
|
1999-09-21 23:15:37 +02:00
|
|
|
|
if (rtl_dump_file)
|
|
|
|
|
{
|
|
|
|
|
fprintf (rtl_dump_file, "Merged %d and %d without moving.\n",
|
|
|
|
|
b->index, c->index);
|
|
|
|
|
}
|
1999-02-26 00:45:42 +01:00
|
|
|
|
|
1999-09-21 23:15:37 +02:00
|
|
|
|
return 1;
|
|
|
|
|
}
|
|
|
|
|
else
|
|
|
|
|
{
|
|
|
|
|
edge tmp_edge;
|
|
|
|
|
basic_block d;
|
|
|
|
|
int c_has_outgoing_fallthru;
|
|
|
|
|
int b_has_incoming_fallthru;
|
1999-02-26 00:45:42 +01:00
|
|
|
|
|
1999-09-21 23:15:37 +02:00
|
|
|
|
/* We must make sure to not munge nesting of exception regions,
|
|
|
|
|
lexical blocks, and loop notes.
|
|
|
|
|
|
|
|
|
|
The first is taken care of by requiring that the active eh
|
|
|
|
|
region at the end of one block always matches the active eh
|
|
|
|
|
region at the beginning of the next block.
|
|
|
|
|
|
|
|
|
|
The later two are taken care of by squeezing out all the notes. */
|
|
|
|
|
|
|
|
|
|
/* ??? A throw/catch edge (or any abnormal edge) should be rarely
|
|
|
|
|
executed and we may want to treat blocks which have two out
|
|
|
|
|
edges, one normal, one abnormal as only having one edge for
|
|
|
|
|
block merging purposes. */
|
1999-09-20 14:34:26 +02:00
|
|
|
|
|
|
|
|
|
for (tmp_edge = c->succ; tmp_edge ; tmp_edge = tmp_edge->succ_next)
|
|
|
|
|
if (tmp_edge->flags & EDGE_FALLTHRU)
|
|
|
|
|
break;
|
|
|
|
|
c_has_outgoing_fallthru = (tmp_edge != NULL);
|
|
|
|
|
|
|
|
|
|
for (tmp_edge = b->pred; tmp_edge ; tmp_edge = tmp_edge->pred_next)
|
|
|
|
|
if (tmp_edge->flags & EDGE_FALLTHRU)
|
|
|
|
|
break;
|
|
|
|
|
b_has_incoming_fallthru = (tmp_edge != NULL);
|
|
|
|
|
|
1999-09-21 23:15:37 +02:00
|
|
|
|
/* If B does not have an incoming fallthru, and the exception regions
|
|
|
|
|
match, then it can be moved immediately before C without introducing
|
1999-10-05 06:12:33 +02:00
|
|
|
|
or modifying jumps.
|
|
|
|
|
|
|
|
|
|
C can not be the first block, so we do not have to worry about
|
|
|
|
|
accessing a non-existent block. */
|
1999-09-21 23:15:37 +02:00
|
|
|
|
d = BASIC_BLOCK (c->index - 1);
|
|
|
|
|
if (! b_has_incoming_fallthru
|
|
|
|
|
&& d->eh_end == b->eh_beg
|
|
|
|
|
&& b->eh_end == c->eh_beg)
|
|
|
|
|
return merge_blocks_move_predecessor_nojumps (b, c);
|
|
|
|
|
|
|
|
|
|
/* Otherwise, we're going to try to move C after B. Make sure the
|
1999-10-05 06:12:33 +02:00
|
|
|
|
exception regions match.
|
|
|
|
|
|
|
|
|
|
If B is the last basic block, then we must not try to access the
|
|
|
|
|
block structure for block B + 1. Luckily in that case we do not
|
|
|
|
|
need to worry about matching exception regions. */
|
|
|
|
|
d = (b->index + 1 < n_basic_blocks ? BASIC_BLOCK (b->index + 1) : NULL);
|
1999-09-21 23:15:37 +02:00
|
|
|
|
if (b->eh_end == c->eh_beg
|
1999-10-05 06:12:33 +02:00
|
|
|
|
&& (d == NULL || c->eh_end == d->eh_beg))
|
1999-09-21 23:15:37 +02:00
|
|
|
|
{
|
|
|
|
|
/* If C does not have an outgoing fallthru, then it can be moved
|
|
|
|
|
immediately after B without introducing or modifying jumps. */
|
|
|
|
|
if (! c_has_outgoing_fallthru)
|
|
|
|
|
return merge_blocks_move_successor_nojumps (b, c);
|
|
|
|
|
|
|
|
|
|
/* Otherwise, we'll need to insert an extra jump, and possibly
|
|
|
|
|
a new block to contain it. */
|
|
|
|
|
/* ??? Not implemented yet. */
|
|
|
|
|
}
|
1999-09-20 14:34:26 +02:00
|
|
|
|
|
1999-09-21 23:15:37 +02:00
|
|
|
|
return 0;
|
1999-02-26 00:45:42 +01:00
|
|
|
|
}
|
1999-09-21 23:15:37 +02:00
|
|
|
|
}
|
flow.c (life_analysis_1): Break out some functions.
Fri Oct 9 15:57:51 1998 Bernd Schmidt <crux@Pool.Informatik.RWTH-Aachen.DE>
* flow.c (life_analysis_1): Break out some functions.
(find_basic_blocks_1): Likewise. Also move some variables out and
make them static.
Rename NONLOCAL_LABEL_LIST arg to NONLOCAL_LABELS and initialize
new static var nonlocal_label_list with it.
(active_eh_region, nested_eh_region, label_value_list,
nonlocal_label_list): New static variables.
(make_edges, delete_unreachable_blocks, delete_block): New static
functions, broken out of find_basic_blocks_1.
(record_volatile_insns, mark_regs_live_at_end, set_noop_p,
noop_move_p): New static functions, broken out of life_analysis_1.
From-SVN: r22963
1998-10-09 17:58:37 +02:00
|
|
|
|
|
1999-09-21 23:15:37 +02:00
|
|
|
|
/* Top level driver for merge_blocks. */
|
1998-10-30 00:18:51 +01:00
|
|
|
|
|
1999-09-21 23:15:37 +02:00
|
|
|
|
static void
|
|
|
|
|
try_merge_blocks ()
|
|
|
|
|
{
|
|
|
|
|
int i;
|
|
|
|
|
|
|
|
|
|
/* Attempt to merge blocks as made possible by edge removal. If a block
|
|
|
|
|
has only one successor, and the successor has only one predecessor,
|
|
|
|
|
they may be combined. */
|
|
|
|
|
|
|
|
|
|
for (i = 0; i < n_basic_blocks; )
|
|
|
|
|
{
|
|
|
|
|
basic_block c, b = BASIC_BLOCK (i);
|
|
|
|
|
edge s;
|
|
|
|
|
|
|
|
|
|
/* A loop because chains of blocks might be combineable. */
|
|
|
|
|
while ((s = b->succ) != NULL
|
|
|
|
|
&& s->succ_next == NULL
|
|
|
|
|
&& (s->flags & EDGE_EH) == 0
|
|
|
|
|
&& (c = s->dest) != EXIT_BLOCK_PTR
|
|
|
|
|
&& c->pred->pred_next == NULL
|
|
|
|
|
/* If the jump insn has side effects, we can't kill the edge. */
|
|
|
|
|
&& (GET_CODE (b->end) != JUMP_INSN
|
|
|
|
|
|| onlyjump_p (b->end))
|
|
|
|
|
&& merge_blocks (s, b, c))
|
|
|
|
|
continue;
|
|
|
|
|
|
|
|
|
|
/* Don't get confused by the index shift caused by deleting blocks. */
|
|
|
|
|
i = b->index + 1;
|
|
|
|
|
}
|
1999-02-26 00:45:42 +01:00
|
|
|
|
}
|
1998-10-30 00:18:51 +01:00
|
|
|
|
|
1999-02-26 00:45:42 +01:00
|
|
|
|
/* The given edge should potentially a fallthru edge. If that is in
|
|
|
|
|
fact true, delete the unconditional jump and barriers that are in
|
|
|
|
|
the way. */
|
|
|
|
|
|
|
|
|
|
static void
|
|
|
|
|
tidy_fallthru_edge (e, b, c)
|
|
|
|
|
edge e;
|
|
|
|
|
basic_block b, c;
|
|
|
|
|
{
|
1999-04-06 17:45:55 +02:00
|
|
|
|
rtx q;
|
1999-02-26 00:45:42 +01:00
|
|
|
|
|
|
|
|
|
/* ??? In a late-running flow pass, other folks may have deleted basic
|
|
|
|
|
blocks by nopping out blocks, leaving multiple BARRIERs between here
|
|
|
|
|
and the target label. They ought to be chastized and fixed.
|
|
|
|
|
|
1999-04-06 17:45:55 +02:00
|
|
|
|
We can also wind up with a sequence of undeletable labels between
|
|
|
|
|
one block and the next.
|
flow.c (life_analysis_1): Break out some functions.
Fri Oct 9 15:57:51 1998 Bernd Schmidt <crux@Pool.Informatik.RWTH-Aachen.DE>
* flow.c (life_analysis_1): Break out some functions.
(find_basic_blocks_1): Likewise. Also move some variables out and
make them static.
Rename NONLOCAL_LABEL_LIST arg to NONLOCAL_LABELS and initialize
new static var nonlocal_label_list with it.
(active_eh_region, nested_eh_region, label_value_list,
nonlocal_label_list): New static variables.
(make_edges, delete_unreachable_blocks, delete_block): New static
functions, broken out of find_basic_blocks_1.
(record_volatile_insns, mark_regs_live_at_end, set_noop_p,
noop_move_p): New static functions, broken out of life_analysis_1.
From-SVN: r22963
1998-10-09 17:58:37 +02:00
|
|
|
|
|
1999-04-06 17:45:55 +02:00
|
|
|
|
So search through a sequence of barriers, labels, and notes for
|
|
|
|
|
the head of block C and assert that we really do fall through. */
|
1998-10-30 00:18:51 +01:00
|
|
|
|
|
1999-04-06 17:45:55 +02:00
|
|
|
|
if (next_real_insn (b->end) != next_real_insn (PREV_INSN (c->head)))
|
1999-02-26 00:45:42 +01:00
|
|
|
|
return;
|
1998-10-30 00:18:51 +01:00
|
|
|
|
|
1999-02-26 00:45:42 +01:00
|
|
|
|
/* Remove what will soon cease being the jump insn from the source block.
|
|
|
|
|
If block B consisted only of this single jump, turn it into a deleted
|
|
|
|
|
note. */
|
|
|
|
|
q = b->end;
|
|
|
|
|
if (GET_CODE (q) == JUMP_INSN)
|
1998-10-30 00:18:51 +01:00
|
|
|
|
{
|
1999-03-09 16:49:53 +01:00
|
|
|
|
#ifdef HAVE_cc0
|
|
|
|
|
/* If this was a conditional jump, we need to also delete
|
|
|
|
|
the insn that set cc0. */
|
1999-08-18 19:51:27 +02:00
|
|
|
|
if (! simplejump_p (q) && condjump_p (q) && sets_cc0_p (PREV_INSN (q)))
|
1999-03-09 16:49:53 +01:00
|
|
|
|
q = PREV_INSN (q);
|
|
|
|
|
#endif
|
|
|
|
|
|
1999-02-26 00:45:42 +01:00
|
|
|
|
if (b->head == q)
|
|
|
|
|
{
|
|
|
|
|
PUT_CODE (q, NOTE);
|
|
|
|
|
NOTE_LINE_NUMBER (q) = NOTE_INSN_DELETED;
|
|
|
|
|
NOTE_SOURCE_FILE (q) = 0;
|
|
|
|
|
}
|
1998-12-02 00:19:12 +01:00
|
|
|
|
else
|
1999-02-26 00:45:42 +01:00
|
|
|
|
b->end = q = PREV_INSN (q);
|
1998-10-30 00:18:51 +01:00
|
|
|
|
}
|
|
|
|
|
|
1999-02-26 00:45:42 +01:00
|
|
|
|
/* Selectively unlink the sequence. */
|
1999-03-09 16:49:53 +01:00
|
|
|
|
if (q != PREV_INSN (c->head))
|
1999-08-29 01:29:55 +02:00
|
|
|
|
flow_delete_insn_chain (NEXT_INSN (q), PREV_INSN (c->head));
|
1998-12-02 10:14:57 +01:00
|
|
|
|
|
1999-02-26 00:45:42 +01:00
|
|
|
|
e->flags |= EDGE_FALLTHRU;
|
|
|
|
|
}
|
flow.c (life_analysis_1): Break out some functions.
Fri Oct 9 15:57:51 1998 Bernd Schmidt <crux@Pool.Informatik.RWTH-Aachen.DE>
* flow.c (life_analysis_1): Break out some functions.
(find_basic_blocks_1): Likewise. Also move some variables out and
make them static.
Rename NONLOCAL_LABEL_LIST arg to NONLOCAL_LABELS and initialize
new static var nonlocal_label_list with it.
(active_eh_region, nested_eh_region, label_value_list,
nonlocal_label_list): New static variables.
(make_edges, delete_unreachable_blocks, delete_block): New static
functions, broken out of find_basic_blocks_1.
(record_volatile_insns, mark_regs_live_at_end, set_noop_p,
noop_move_p): New static functions, broken out of life_analysis_1.
From-SVN: r22963
1998-10-09 17:58:37 +02:00
|
|
|
|
|
1999-02-26 00:45:42 +01:00
|
|
|
|
/* Discover and record the loop depth at the head of each basic block. */
|
|
|
|
|
|
|
|
|
|
static void
|
|
|
|
|
calculate_loop_depth (insns)
|
|
|
|
|
rtx insns;
|
|
|
|
|
{
|
|
|
|
|
basic_block bb;
|
|
|
|
|
rtx insn;
|
|
|
|
|
int i = 0, depth = 1;
|
flow.c (life_analysis_1): Break out some functions.
Fri Oct 9 15:57:51 1998 Bernd Schmidt <crux@Pool.Informatik.RWTH-Aachen.DE>
* flow.c (life_analysis_1): Break out some functions.
(find_basic_blocks_1): Likewise. Also move some variables out and
make them static.
Rename NONLOCAL_LABEL_LIST arg to NONLOCAL_LABELS and initialize
new static var nonlocal_label_list with it.
(active_eh_region, nested_eh_region, label_value_list,
nonlocal_label_list): New static variables.
(make_edges, delete_unreachable_blocks, delete_block): New static
functions, broken out of find_basic_blocks_1.
(record_volatile_insns, mark_regs_live_at_end, set_noop_p,
noop_move_p): New static functions, broken out of life_analysis_1.
From-SVN: r22963
1998-10-09 17:58:37 +02:00
|
|
|
|
|
1999-02-26 00:45:42 +01:00
|
|
|
|
bb = BASIC_BLOCK (i);
|
|
|
|
|
for (insn = insns; insn ; insn = NEXT_INSN (insn))
|
flow.c (life_analysis_1): Break out some functions.
Fri Oct 9 15:57:51 1998 Bernd Schmidt <crux@Pool.Informatik.RWTH-Aachen.DE>
* flow.c (life_analysis_1): Break out some functions.
(find_basic_blocks_1): Likewise. Also move some variables out and
make them static.
Rename NONLOCAL_LABEL_LIST arg to NONLOCAL_LABELS and initialize
new static var nonlocal_label_list with it.
(active_eh_region, nested_eh_region, label_value_list,
nonlocal_label_list): New static variables.
(make_edges, delete_unreachable_blocks, delete_block): New static
functions, broken out of find_basic_blocks_1.
(record_volatile_insns, mark_regs_live_at_end, set_noop_p,
noop_move_p): New static functions, broken out of life_analysis_1.
From-SVN: r22963
1998-10-09 17:58:37 +02:00
|
|
|
|
{
|
1999-02-26 00:45:42 +01:00
|
|
|
|
if (insn == bb->head)
|
|
|
|
|
{
|
|
|
|
|
bb->loop_depth = depth;
|
|
|
|
|
if (++i >= n_basic_blocks)
|
flow.c (life_analysis_1): Break out some functions.
Fri Oct 9 15:57:51 1998 Bernd Schmidt <crux@Pool.Informatik.RWTH-Aachen.DE>
* flow.c (life_analysis_1): Break out some functions.
(find_basic_blocks_1): Likewise. Also move some variables out and
make them static.
Rename NONLOCAL_LABEL_LIST arg to NONLOCAL_LABELS and initialize
new static var nonlocal_label_list with it.
(active_eh_region, nested_eh_region, label_value_list,
nonlocal_label_list): New static variables.
(make_edges, delete_unreachable_blocks, delete_block): New static
functions, broken out of find_basic_blocks_1.
(record_volatile_insns, mark_regs_live_at_end, set_noop_p,
noop_move_p): New static functions, broken out of life_analysis_1.
From-SVN: r22963
1998-10-09 17:58:37 +02:00
|
|
|
|
break;
|
1999-02-26 00:45:42 +01:00
|
|
|
|
bb = BASIC_BLOCK (i);
|
|
|
|
|
}
|
flow.c (life_analysis_1): Break out some functions.
Fri Oct 9 15:57:51 1998 Bernd Schmidt <crux@Pool.Informatik.RWTH-Aachen.DE>
* flow.c (life_analysis_1): Break out some functions.
(find_basic_blocks_1): Likewise. Also move some variables out and
make them static.
Rename NONLOCAL_LABEL_LIST arg to NONLOCAL_LABELS and initialize
new static var nonlocal_label_list with it.
(active_eh_region, nested_eh_region, label_value_list,
nonlocal_label_list): New static variables.
(make_edges, delete_unreachable_blocks, delete_block): New static
functions, broken out of find_basic_blocks_1.
(record_volatile_insns, mark_regs_live_at_end, set_noop_p,
noop_move_p): New static functions, broken out of life_analysis_1.
From-SVN: r22963
1998-10-09 17:58:37 +02:00
|
|
|
|
|
1999-02-26 00:45:42 +01:00
|
|
|
|
if (GET_CODE (insn) == NOTE)
|
|
|
|
|
{
|
|
|
|
|
if (NOTE_LINE_NUMBER (insn) == NOTE_INSN_LOOP_BEG)
|
|
|
|
|
depth++;
|
|
|
|
|
else if (NOTE_LINE_NUMBER (insn) == NOTE_INSN_LOOP_END)
|
|
|
|
|
depth--;
|
|
|
|
|
|
|
|
|
|
/* If we have LOOP_DEPTH == 0, there has been a bookkeeping error. */
|
|
|
|
|
if (depth == 0)
|
|
|
|
|
abort ();
|
|
|
|
|
}
|
|
|
|
|
}
|
flow.c (life_analysis_1): Break out some functions.
Fri Oct 9 15:57:51 1998 Bernd Schmidt <crux@Pool.Informatik.RWTH-Aachen.DE>
* flow.c (life_analysis_1): Break out some functions.
(find_basic_blocks_1): Likewise. Also move some variables out and
make them static.
Rename NONLOCAL_LABEL_LIST arg to NONLOCAL_LABELS and initialize
new static var nonlocal_label_list with it.
(active_eh_region, nested_eh_region, label_value_list,
nonlocal_label_list): New static variables.
(make_edges, delete_unreachable_blocks, delete_block): New static
functions, broken out of find_basic_blocks_1.
(record_volatile_insns, mark_regs_live_at_end, set_noop_p,
noop_move_p): New static functions, broken out of life_analysis_1.
From-SVN: r22963
1998-10-09 17:58:37 +02:00
|
|
|
|
}
|
1992-01-15 22:33:30 +01:00
|
|
|
|
|
1998-03-05 23:31:51 +01:00
|
|
|
|
/* Perform data flow analysis.
|
|
|
|
|
F is the first insn of the function and NREGS the number of register numbers
|
|
|
|
|
in use. */
|
|
|
|
|
|
|
|
|
|
void
|
1999-04-11 00:53:08 +02:00
|
|
|
|
life_analysis (f, nregs, file, remove_dead_code)
|
1998-03-05 23:31:51 +01:00
|
|
|
|
rtx f;
|
|
|
|
|
int nregs;
|
|
|
|
|
FILE *file;
|
1999-04-11 00:53:08 +02:00
|
|
|
|
int remove_dead_code;
|
1998-03-05 23:31:51 +01:00
|
|
|
|
{
|
|
|
|
|
#ifdef ELIMINABLE_REGS
|
1998-03-19 08:14:19 +01:00
|
|
|
|
register size_t i;
|
1998-03-05 23:31:51 +01:00
|
|
|
|
static struct {int from, to; } eliminables[] = ELIMINABLE_REGS;
|
|
|
|
|
#endif
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
int flags;
|
1998-03-05 23:31:51 +01:00
|
|
|
|
|
|
|
|
|
/* Record which registers will be eliminated. We use this in
|
|
|
|
|
mark_used_regs. */
|
|
|
|
|
|
|
|
|
|
CLEAR_HARD_REG_SET (elim_reg_set);
|
|
|
|
|
|
|
|
|
|
#ifdef ELIMINABLE_REGS
|
|
|
|
|
for (i = 0; i < sizeof eliminables / sizeof eliminables[0]; i++)
|
|
|
|
|
SET_HARD_REG_BIT (elim_reg_set, eliminables[i].from);
|
|
|
|
|
#else
|
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|
|
|
SET_HARD_REG_BIT (elim_reg_set, FRAME_POINTER_REGNUM);
|
|
|
|
|
#endif
|
|
|
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|
|
1999-02-26 00:45:42 +01:00
|
|
|
|
/* Allocate a bitmap to be filled in by record_volatile_insns. */
|
1999-11-02 00:19:44 +01:00
|
|
|
|
uid_volatile = BITMAP_XMALLOC ();
|
1999-02-26 00:45:42 +01:00
|
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|
|
|
1999-01-18 04:01:26 +01:00
|
|
|
|
/* We want alias analysis information for local dead store elimination. */
|
|
|
|
|
init_alias_analysis ();
|
1999-08-19 17:53:10 +02:00
|
|
|
|
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
flags = PROP_FINAL;
|
|
|
|
|
if (! remove_dead_code)
|
|
|
|
|
flags &= ~(PROP_SCAN_DEAD_CODE | PROP_KILL_DEAD_CODE);
|
|
|
|
|
life_analysis_1 (f, nregs, flags);
|
1999-08-19 17:53:10 +02:00
|
|
|
|
|
|
|
|
|
if (! reload_completed)
|
|
|
|
|
mark_constant_function ();
|
|
|
|
|
|
1999-01-18 04:01:26 +01:00
|
|
|
|
end_alias_analysis ();
|
|
|
|
|
|
1998-03-05 23:31:51 +01:00
|
|
|
|
if (file)
|
|
|
|
|
dump_flow_info (file);
|
|
|
|
|
|
1999-11-05 01:49:03 +01:00
|
|
|
|
BITMAP_XFREE (uid_volatile);
|
1998-03-05 23:31:51 +01:00
|
|
|
|
free_basic_block_vars (1);
|
|
|
|
|
}
|
|
|
|
|
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
/* A subroutine of verify_wide_reg, called through for_each_rtx.
|
|
|
|
|
Search for REGNO. If found, abort if it is not wider than word_mode. */
|
|
|
|
|
|
|
|
|
|
static int
|
|
|
|
|
verify_wide_reg_1 (px, pregno)
|
|
|
|
|
rtx *px;
|
|
|
|
|
void *pregno;
|
|
|
|
|
{
|
|
|
|
|
rtx x = *px;
|
|
|
|
|
int regno = *(int *) pregno;
|
|
|
|
|
|
|
|
|
|
if (GET_CODE (x) == REG && REGNO (x) == regno)
|
|
|
|
|
{
|
|
|
|
|
if (GET_MODE_BITSIZE (GET_MODE (x)) <= BITS_PER_WORD)
|
|
|
|
|
abort ();
|
|
|
|
|
return 1;
|
|
|
|
|
}
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* A subroutine of verify_local_live_at_start. Search through insns
|
|
|
|
|
between HEAD and END looking for register REGNO. */
|
|
|
|
|
|
|
|
|
|
static void
|
|
|
|
|
verify_wide_reg (regno, head, end)
|
|
|
|
|
int regno;
|
|
|
|
|
rtx head, end;
|
|
|
|
|
{
|
|
|
|
|
while (1)
|
|
|
|
|
{
|
|
|
|
|
if (GET_RTX_CLASS (GET_CODE (head)) == 'i'
|
|
|
|
|
&& for_each_rtx (&PATTERN (head), verify_wide_reg_1, ®no))
|
|
|
|
|
return;
|
|
|
|
|
if (head == end)
|
|
|
|
|
break;
|
|
|
|
|
head = NEXT_INSN (head);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* We didn't find the register at all. Something's way screwy. */
|
|
|
|
|
abort ();
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* A subroutine of update_life_info. Verify that there are no untoward
|
|
|
|
|
changes in live_at_start during a local update. */
|
|
|
|
|
|
|
|
|
|
static void
|
|
|
|
|
verify_local_live_at_start (new_live_at_start, bb)
|
|
|
|
|
regset new_live_at_start;
|
|
|
|
|
basic_block bb;
|
|
|
|
|
{
|
|
|
|
|
if (reload_completed)
|
|
|
|
|
{
|
|
|
|
|
/* After reload, there are no pseudos, nor subregs of multi-word
|
|
|
|
|
registers. The regsets should exactly match. */
|
|
|
|
|
if (! REG_SET_EQUAL_P (new_live_at_start, bb->global_live_at_start))
|
|
|
|
|
abort ();
|
|
|
|
|
}
|
|
|
|
|
else
|
|
|
|
|
{
|
|
|
|
|
int i;
|
|
|
|
|
|
|
|
|
|
/* Find the set of changed registers. */
|
|
|
|
|
XOR_REG_SET (new_live_at_start, bb->global_live_at_start);
|
|
|
|
|
|
|
|
|
|
EXECUTE_IF_SET_IN_REG_SET (new_live_at_start, 0, i,
|
|
|
|
|
{
|
|
|
|
|
/* No registers should die. */
|
|
|
|
|
if (REGNO_REG_SET_P (bb->global_live_at_start, i))
|
|
|
|
|
abort ();
|
|
|
|
|
/* Verify that the now-live register is wider than word_mode. */
|
|
|
|
|
verify_wide_reg (i, bb->head, bb->end);
|
|
|
|
|
});
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Updates death notes starting with the basic blocks set in BLOCKS.
|
|
|
|
|
|
|
|
|
|
If LOCAL_ONLY, such as after splitting or peepholeing, we are only
|
|
|
|
|
expecting local modifications to basic blocks. If we find extra
|
|
|
|
|
registers live at the beginning of a block, then we either killed
|
|
|
|
|
useful data, or we have a broken split that wants data not provided.
|
|
|
|
|
If we find registers removed from live_at_start, that means we have
|
|
|
|
|
a broken peephole that is killing a register it shouldn't.
|
|
|
|
|
|
|
|
|
|
??? This is not true in one situation -- when a pre-reload splitter
|
|
|
|
|
generates subregs of a multi-word pseudo, current life analysis will
|
1999-10-20 16:04:12 +02:00
|
|
|
|
lose the kill. So we _can_ have a pseudo go live. How irritating.
|
|
|
|
|
|
|
|
|
|
BLOCK_FOR_INSN is assumed to be correct.
|
|
|
|
|
|
|
|
|
|
??? PROP_FLAGS should not contain PROP_LOG_LINKS. Need to set up
|
|
|
|
|
reg_next_use for that. Including PROP_REG_INFO does not refresh
|
|
|
|
|
regs_ever_live unless the caller resets it to zero. */
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
|
|
|
|
|
void
|
1999-10-20 16:04:12 +02:00
|
|
|
|
update_life_info (blocks, extent, prop_flags)
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
sbitmap blocks;
|
1999-10-11 01:34:17 +02:00
|
|
|
|
enum update_life_extent extent;
|
1999-10-20 16:04:12 +02:00
|
|
|
|
int prop_flags;
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
{
|
|
|
|
|
regset tmp;
|
|
|
|
|
int i;
|
|
|
|
|
|
|
|
|
|
tmp = ALLOCA_REG_SET ();
|
|
|
|
|
|
|
|
|
|
/* For a global update, we go through the relaxation process again. */
|
1999-10-11 01:34:17 +02:00
|
|
|
|
if (extent != UPDATE_LIFE_LOCAL)
|
|
|
|
|
{
|
1999-10-20 16:04:12 +02:00
|
|
|
|
calculate_global_regs_live (blocks, blocks,
|
|
|
|
|
prop_flags & PROP_SCAN_DEAD_CODE);
|
1999-10-11 01:34:17 +02:00
|
|
|
|
|
|
|
|
|
/* If asked, remove notes from the blocks we'll update. */
|
|
|
|
|
if (extent == UPDATE_LIFE_GLOBAL_RM_NOTES)
|
|
|
|
|
count_or_remove_death_notes (blocks, 1);
|
|
|
|
|
}
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
|
|
|
|
|
EXECUTE_IF_SET_IN_SBITMAP (blocks, 0, i,
|
|
|
|
|
{
|
|
|
|
|
basic_block bb = BASIC_BLOCK (i);
|
|
|
|
|
|
|
|
|
|
COPY_REG_SET (tmp, bb->global_live_at_end);
|
|
|
|
|
propagate_block (tmp, bb->head, bb->end, (regset) NULL, i,
|
1999-10-20 16:04:12 +02:00
|
|
|
|
prop_flags);
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
|
1999-10-11 01:34:17 +02:00
|
|
|
|
if (extent == UPDATE_LIFE_LOCAL)
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
verify_local_live_at_start (tmp, bb);
|
|
|
|
|
});
|
|
|
|
|
|
|
|
|
|
FREE_REG_SET (tmp);
|
|
|
|
|
}
|
|
|
|
|
|
1998-03-05 23:31:51 +01:00
|
|
|
|
/* Free the variables allocated by find_basic_blocks.
|
|
|
|
|
|
1999-02-26 00:45:42 +01:00
|
|
|
|
KEEP_HEAD_END_P is non-zero if basic_block_info is not to be freed. */
|
1998-03-05 23:31:51 +01:00
|
|
|
|
|
|
|
|
|
void
|
|
|
|
|
free_basic_block_vars (keep_head_end_p)
|
|
|
|
|
int keep_head_end_p;
|
|
|
|
|
{
|
1999-02-26 00:45:42 +01:00
|
|
|
|
if (basic_block_for_insn)
|
1998-03-05 23:31:51 +01:00
|
|
|
|
{
|
1999-02-26 00:45:42 +01:00
|
|
|
|
VARRAY_FREE (basic_block_for_insn);
|
|
|
|
|
basic_block_for_insn = NULL;
|
1998-03-05 23:31:51 +01:00
|
|
|
|
}
|
|
|
|
|
|
1999-02-26 00:45:42 +01:00
|
|
|
|
if (! keep_head_end_p)
|
1998-03-05 23:31:51 +01:00
|
|
|
|
{
|
1999-02-26 00:45:42 +01:00
|
|
|
|
clear_edges ();
|
|
|
|
|
VARRAY_FREE (basic_block_info);
|
|
|
|
|
n_basic_blocks = 0;
|
1999-03-31 14:41:03 +02:00
|
|
|
|
|
|
|
|
|
ENTRY_BLOCK_PTR->aux = NULL;
|
|
|
|
|
ENTRY_BLOCK_PTR->global_live_at_end = NULL;
|
|
|
|
|
EXIT_BLOCK_PTR->aux = NULL;
|
|
|
|
|
EXIT_BLOCK_PTR->global_live_at_start = NULL;
|
1998-03-05 23:31:51 +01:00
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
flow.c (life_analysis_1): Break out some functions.
Fri Oct 9 15:57:51 1998 Bernd Schmidt <crux@Pool.Informatik.RWTH-Aachen.DE>
* flow.c (life_analysis_1): Break out some functions.
(find_basic_blocks_1): Likewise. Also move some variables out and
make them static.
Rename NONLOCAL_LABEL_LIST arg to NONLOCAL_LABELS and initialize
new static var nonlocal_label_list with it.
(active_eh_region, nested_eh_region, label_value_list,
nonlocal_label_list): New static variables.
(make_edges, delete_unreachable_blocks, delete_block): New static
functions, broken out of find_basic_blocks_1.
(record_volatile_insns, mark_regs_live_at_end, set_noop_p,
noop_move_p): New static functions, broken out of life_analysis_1.
From-SVN: r22963
1998-10-09 17:58:37 +02:00
|
|
|
|
/* Return nonzero if the destination of SET equals the source. */
|
|
|
|
|
static int
|
|
|
|
|
set_noop_p (set)
|
|
|
|
|
rtx set;
|
|
|
|
|
{
|
|
|
|
|
rtx src = SET_SRC (set);
|
|
|
|
|
rtx dst = SET_DEST (set);
|
|
|
|
|
if (GET_CODE (src) == REG && GET_CODE (dst) == REG
|
|
|
|
|
&& REGNO (src) == REGNO (dst))
|
|
|
|
|
return 1;
|
|
|
|
|
if (GET_CODE (src) != SUBREG || GET_CODE (dst) != SUBREG
|
|
|
|
|
|| SUBREG_WORD (src) != SUBREG_WORD (dst))
|
|
|
|
|
return 0;
|
|
|
|
|
src = SUBREG_REG (src);
|
|
|
|
|
dst = SUBREG_REG (dst);
|
|
|
|
|
if (GET_CODE (src) == REG && GET_CODE (dst) == REG
|
|
|
|
|
&& REGNO (src) == REGNO (dst))
|
|
|
|
|
return 1;
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Return nonzero if an insn consists only of SETs, each of which only sets a
|
|
|
|
|
value to itself. */
|
|
|
|
|
static int
|
|
|
|
|
noop_move_p (insn)
|
|
|
|
|
rtx insn;
|
|
|
|
|
{
|
|
|
|
|
rtx pat = PATTERN (insn);
|
|
|
|
|
|
|
|
|
|
/* Insns carrying these notes are useful later on. */
|
|
|
|
|
if (find_reg_note (insn, REG_EQUAL, NULL_RTX))
|
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
|
|
if (GET_CODE (pat) == SET && set_noop_p (pat))
|
|
|
|
|
return 1;
|
|
|
|
|
|
|
|
|
|
if (GET_CODE (pat) == PARALLEL)
|
|
|
|
|
{
|
|
|
|
|
int i;
|
|
|
|
|
/* If nothing but SETs of registers to themselves,
|
|
|
|
|
this insn can also be deleted. */
|
|
|
|
|
for (i = 0; i < XVECLEN (pat, 0); i++)
|
|
|
|
|
{
|
|
|
|
|
rtx tem = XVECEXP (pat, 0, i);
|
|
|
|
|
|
|
|
|
|
if (GET_CODE (tem) == USE
|
|
|
|
|
|| GET_CODE (tem) == CLOBBER)
|
|
|
|
|
continue;
|
|
|
|
|
|
|
|
|
|
if (GET_CODE (tem) != SET || ! set_noop_p (tem))
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
return 1;
|
|
|
|
|
}
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
|
1998-10-12 12:06:49 +02:00
|
|
|
|
static void
|
1999-10-27 21:27:41 +02:00
|
|
|
|
notice_stack_pointer_modification (x, pat, data)
|
1998-10-12 12:06:49 +02:00
|
|
|
|
rtx x;
|
|
|
|
|
rtx pat ATTRIBUTE_UNUSED;
|
1999-10-27 21:27:41 +02:00
|
|
|
|
void *data ATTRIBUTE_UNUSED;
|
1998-10-12 12:06:49 +02:00
|
|
|
|
{
|
|
|
|
|
if (x == stack_pointer_rtx
|
|
|
|
|
/* The stack pointer is only modified indirectly as the result
|
|
|
|
|
of a push until later in flow. See the comments in rtl.texi
|
|
|
|
|
regarding Embedded Side-Effects on Addresses. */
|
|
|
|
|
|| (GET_CODE (x) == MEM
|
|
|
|
|
&& (GET_CODE (XEXP (x, 0)) == PRE_DEC
|
|
|
|
|
|| GET_CODE (XEXP (x, 0)) == PRE_INC
|
|
|
|
|
|| GET_CODE (XEXP (x, 0)) == POST_DEC
|
|
|
|
|
|| GET_CODE (XEXP (x, 0)) == POST_INC)
|
|
|
|
|
&& XEXP (XEXP (x, 0), 0) == stack_pointer_rtx))
|
|
|
|
|
current_function_sp_is_unchanging = 0;
|
|
|
|
|
}
|
|
|
|
|
|
flow.c (life_analysis_1): Break out some functions.
Fri Oct 9 15:57:51 1998 Bernd Schmidt <crux@Pool.Informatik.RWTH-Aachen.DE>
* flow.c (life_analysis_1): Break out some functions.
(find_basic_blocks_1): Likewise. Also move some variables out and
make them static.
Rename NONLOCAL_LABEL_LIST arg to NONLOCAL_LABELS and initialize
new static var nonlocal_label_list with it.
(active_eh_region, nested_eh_region, label_value_list,
nonlocal_label_list): New static variables.
(make_edges, delete_unreachable_blocks, delete_block): New static
functions, broken out of find_basic_blocks_1.
(record_volatile_insns, mark_regs_live_at_end, set_noop_p,
noop_move_p): New static functions, broken out of life_analysis_1.
From-SVN: r22963
1998-10-09 17:58:37 +02:00
|
|
|
|
/* Record which insns refer to any volatile memory
|
|
|
|
|
or for any reason can't be deleted just because they are dead stores.
|
1998-10-12 12:06:49 +02:00
|
|
|
|
Also, delete any insns that copy a register to itself.
|
|
|
|
|
And see if the stack pointer is modified. */
|
flow.c (life_analysis_1): Break out some functions.
Fri Oct 9 15:57:51 1998 Bernd Schmidt <crux@Pool.Informatik.RWTH-Aachen.DE>
* flow.c (life_analysis_1): Break out some functions.
(find_basic_blocks_1): Likewise. Also move some variables out and
make them static.
Rename NONLOCAL_LABEL_LIST arg to NONLOCAL_LABELS and initialize
new static var nonlocal_label_list with it.
(active_eh_region, nested_eh_region, label_value_list,
nonlocal_label_list): New static variables.
(make_edges, delete_unreachable_blocks, delete_block): New static
functions, broken out of find_basic_blocks_1.
(record_volatile_insns, mark_regs_live_at_end, set_noop_p,
noop_move_p): New static functions, broken out of life_analysis_1.
From-SVN: r22963
1998-10-09 17:58:37 +02:00
|
|
|
|
static void
|
|
|
|
|
record_volatile_insns (f)
|
|
|
|
|
rtx f;
|
|
|
|
|
{
|
|
|
|
|
rtx insn;
|
|
|
|
|
for (insn = f; insn; insn = NEXT_INSN (insn))
|
|
|
|
|
{
|
|
|
|
|
enum rtx_code code1 = GET_CODE (insn);
|
|
|
|
|
if (code1 == CALL_INSN)
|
1999-02-26 00:45:42 +01:00
|
|
|
|
SET_INSN_VOLATILE (insn);
|
flow.c (life_analysis_1): Break out some functions.
Fri Oct 9 15:57:51 1998 Bernd Schmidt <crux@Pool.Informatik.RWTH-Aachen.DE>
* flow.c (life_analysis_1): Break out some functions.
(find_basic_blocks_1): Likewise. Also move some variables out and
make them static.
Rename NONLOCAL_LABEL_LIST arg to NONLOCAL_LABELS and initialize
new static var nonlocal_label_list with it.
(active_eh_region, nested_eh_region, label_value_list,
nonlocal_label_list): New static variables.
(make_edges, delete_unreachable_blocks, delete_block): New static
functions, broken out of find_basic_blocks_1.
(record_volatile_insns, mark_regs_live_at_end, set_noop_p,
noop_move_p): New static functions, broken out of life_analysis_1.
From-SVN: r22963
1998-10-09 17:58:37 +02:00
|
|
|
|
else if (code1 == INSN || code1 == JUMP_INSN)
|
|
|
|
|
{
|
|
|
|
|
if (GET_CODE (PATTERN (insn)) != USE
|
|
|
|
|
&& volatile_refs_p (PATTERN (insn)))
|
1999-02-26 00:45:42 +01:00
|
|
|
|
SET_INSN_VOLATILE (insn);
|
flow.c (life_analysis_1): Break out some functions.
Fri Oct 9 15:57:51 1998 Bernd Schmidt <crux@Pool.Informatik.RWTH-Aachen.DE>
* flow.c (life_analysis_1): Break out some functions.
(find_basic_blocks_1): Likewise. Also move some variables out and
make them static.
Rename NONLOCAL_LABEL_LIST arg to NONLOCAL_LABELS and initialize
new static var nonlocal_label_list with it.
(active_eh_region, nested_eh_region, label_value_list,
nonlocal_label_list): New static variables.
(make_edges, delete_unreachable_blocks, delete_block): New static
functions, broken out of find_basic_blocks_1.
(record_volatile_insns, mark_regs_live_at_end, set_noop_p,
noop_move_p): New static functions, broken out of life_analysis_1.
From-SVN: r22963
1998-10-09 17:58:37 +02:00
|
|
|
|
|
|
|
|
|
/* A SET that makes space on the stack cannot be dead.
|
|
|
|
|
(Such SETs occur only for allocating variable-size data,
|
|
|
|
|
so they will always have a PLUS or MINUS according to the
|
|
|
|
|
direction of stack growth.)
|
|
|
|
|
Even if this function never uses this stack pointer value,
|
|
|
|
|
signal handlers do! */
|
|
|
|
|
else if (code1 == INSN && GET_CODE (PATTERN (insn)) == SET
|
|
|
|
|
&& SET_DEST (PATTERN (insn)) == stack_pointer_rtx
|
|
|
|
|
#ifdef STACK_GROWS_DOWNWARD
|
|
|
|
|
&& GET_CODE (SET_SRC (PATTERN (insn))) == MINUS
|
|
|
|
|
#else
|
|
|
|
|
&& GET_CODE (SET_SRC (PATTERN (insn))) == PLUS
|
|
|
|
|
#endif
|
|
|
|
|
&& XEXP (SET_SRC (PATTERN (insn)), 0) == stack_pointer_rtx)
|
1999-02-26 00:45:42 +01:00
|
|
|
|
SET_INSN_VOLATILE (insn);
|
flow.c (life_analysis_1): Break out some functions.
Fri Oct 9 15:57:51 1998 Bernd Schmidt <crux@Pool.Informatik.RWTH-Aachen.DE>
* flow.c (life_analysis_1): Break out some functions.
(find_basic_blocks_1): Likewise. Also move some variables out and
make them static.
Rename NONLOCAL_LABEL_LIST arg to NONLOCAL_LABELS and initialize
new static var nonlocal_label_list with it.
(active_eh_region, nested_eh_region, label_value_list,
nonlocal_label_list): New static variables.
(make_edges, delete_unreachable_blocks, delete_block): New static
functions, broken out of find_basic_blocks_1.
(record_volatile_insns, mark_regs_live_at_end, set_noop_p,
noop_move_p): New static functions, broken out of life_analysis_1.
From-SVN: r22963
1998-10-09 17:58:37 +02:00
|
|
|
|
|
|
|
|
|
/* Delete (in effect) any obvious no-op moves. */
|
|
|
|
|
else if (noop_move_p (insn))
|
|
|
|
|
{
|
|
|
|
|
PUT_CODE (insn, NOTE);
|
|
|
|
|
NOTE_LINE_NUMBER (insn) = NOTE_INSN_DELETED;
|
|
|
|
|
NOTE_SOURCE_FILE (insn) = 0;
|
|
|
|
|
}
|
|
|
|
|
}
|
1998-10-12 12:06:49 +02:00
|
|
|
|
|
|
|
|
|
/* Check if insn modifies the stack pointer. */
|
|
|
|
|
if ( current_function_sp_is_unchanging
|
|
|
|
|
&& GET_RTX_CLASS (GET_CODE (insn)) == 'i')
|
1999-10-27 21:27:41 +02:00
|
|
|
|
note_stores (PATTERN (insn),
|
|
|
|
|
notice_stack_pointer_modification,
|
|
|
|
|
NULL);
|
flow.c (life_analysis_1): Break out some functions.
Fri Oct 9 15:57:51 1998 Bernd Schmidt <crux@Pool.Informatik.RWTH-Aachen.DE>
* flow.c (life_analysis_1): Break out some functions.
(find_basic_blocks_1): Likewise. Also move some variables out and
make them static.
Rename NONLOCAL_LABEL_LIST arg to NONLOCAL_LABELS and initialize
new static var nonlocal_label_list with it.
(active_eh_region, nested_eh_region, label_value_list,
nonlocal_label_list): New static variables.
(make_edges, delete_unreachable_blocks, delete_block): New static
functions, broken out of find_basic_blocks_1.
(record_volatile_insns, mark_regs_live_at_end, set_noop_p,
noop_move_p): New static functions, broken out of life_analysis_1.
From-SVN: r22963
1998-10-09 17:58:37 +02:00
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
/* Mark a register in SET. Hard registers in large modes get all
|
|
|
|
|
of their component registers set as well. */
|
|
|
|
|
static void
|
|
|
|
|
mark_reg (set, reg)
|
|
|
|
|
regset set;
|
|
|
|
|
rtx reg;
|
|
|
|
|
{
|
|
|
|
|
int regno = REGNO (reg);
|
|
|
|
|
|
|
|
|
|
SET_REGNO_REG_SET (set, regno);
|
|
|
|
|
if (regno < FIRST_PSEUDO_REGISTER)
|
|
|
|
|
{
|
|
|
|
|
int n = HARD_REGNO_NREGS (regno, GET_MODE (reg));
|
|
|
|
|
while (--n > 0)
|
|
|
|
|
SET_REGNO_REG_SET (set, regno + n);
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
flow.c (life_analysis_1): Break out some functions.
Fri Oct 9 15:57:51 1998 Bernd Schmidt <crux@Pool.Informatik.RWTH-Aachen.DE>
* flow.c (life_analysis_1): Break out some functions.
(find_basic_blocks_1): Likewise. Also move some variables out and
make them static.
Rename NONLOCAL_LABEL_LIST arg to NONLOCAL_LABELS and initialize
new static var nonlocal_label_list with it.
(active_eh_region, nested_eh_region, label_value_list,
nonlocal_label_list): New static variables.
(make_edges, delete_unreachable_blocks, delete_block): New static
functions, broken out of find_basic_blocks_1.
(record_volatile_insns, mark_regs_live_at_end, set_noop_p,
noop_move_p): New static functions, broken out of life_analysis_1.
From-SVN: r22963
1998-10-09 17:58:37 +02:00
|
|
|
|
/* Mark those regs which are needed at the end of the function as live
|
|
|
|
|
at the end of the last basic block. */
|
|
|
|
|
static void
|
|
|
|
|
mark_regs_live_at_end (set)
|
|
|
|
|
regset set;
|
|
|
|
|
{
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
tree type;
|
flow.c (life_analysis_1): Break out some functions.
Fri Oct 9 15:57:51 1998 Bernd Schmidt <crux@Pool.Informatik.RWTH-Aachen.DE>
* flow.c (life_analysis_1): Break out some functions.
(find_basic_blocks_1): Likewise. Also move some variables out and
make them static.
Rename NONLOCAL_LABEL_LIST arg to NONLOCAL_LABELS and initialize
new static var nonlocal_label_list with it.
(active_eh_region, nested_eh_region, label_value_list,
nonlocal_label_list): New static variables.
(make_edges, delete_unreachable_blocks, delete_block): New static
functions, broken out of find_basic_blocks_1.
(record_volatile_insns, mark_regs_live_at_end, set_noop_p,
noop_move_p): New static functions, broken out of life_analysis_1.
From-SVN: r22963
1998-10-09 17:58:37 +02:00
|
|
|
|
int i;
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
|
1999-02-26 00:45:42 +01:00
|
|
|
|
/* If exiting needs the right stack value, consider the stack pointer
|
|
|
|
|
live at the end of the function. */
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
if ((HAVE_epilogue && reload_completed)
|
|
|
|
|
|| ! EXIT_IGNORE_STACK
|
flow.c (life_analysis_1): Break out some functions.
Fri Oct 9 15:57:51 1998 Bernd Schmidt <crux@Pool.Informatik.RWTH-Aachen.DE>
* flow.c (life_analysis_1): Break out some functions.
(find_basic_blocks_1): Likewise. Also move some variables out and
make them static.
Rename NONLOCAL_LABEL_LIST arg to NONLOCAL_LABELS and initialize
new static var nonlocal_label_list with it.
(active_eh_region, nested_eh_region, label_value_list,
nonlocal_label_list): New static variables.
(make_edges, delete_unreachable_blocks, delete_block): New static
functions, broken out of find_basic_blocks_1.
(record_volatile_insns, mark_regs_live_at_end, set_noop_p,
noop_move_p): New static functions, broken out of life_analysis_1.
From-SVN: r22963
1998-10-09 17:58:37 +02:00
|
|
|
|
|| (! FRAME_POINTER_REQUIRED
|
|
|
|
|
&& ! current_function_calls_alloca
|
1998-10-12 12:06:49 +02:00
|
|
|
|
&& flag_omit_frame_pointer)
|
|
|
|
|
|| current_function_sp_is_unchanging)
|
1999-02-26 00:45:42 +01:00
|
|
|
|
{
|
|
|
|
|
SET_REGNO_REG_SET (set, STACK_POINTER_REGNUM);
|
|
|
|
|
}
|
flow.c (life_analysis_1): Break out some functions.
Fri Oct 9 15:57:51 1998 Bernd Schmidt <crux@Pool.Informatik.RWTH-Aachen.DE>
* flow.c (life_analysis_1): Break out some functions.
(find_basic_blocks_1): Likewise. Also move some variables out and
make them static.
Rename NONLOCAL_LABEL_LIST arg to NONLOCAL_LABELS and initialize
new static var nonlocal_label_list with it.
(active_eh_region, nested_eh_region, label_value_list,
nonlocal_label_list): New static variables.
(make_edges, delete_unreachable_blocks, delete_block): New static
functions, broken out of find_basic_blocks_1.
(record_volatile_insns, mark_regs_live_at_end, set_noop_p,
noop_move_p): New static functions, broken out of life_analysis_1.
From-SVN: r22963
1998-10-09 17:58:37 +02:00
|
|
|
|
|
1999-02-26 00:45:42 +01:00
|
|
|
|
/* Mark the frame pointer if needed at the end of the function. If
|
flow.c (life_analysis_1): Break out some functions.
Fri Oct 9 15:57:51 1998 Bernd Schmidt <crux@Pool.Informatik.RWTH-Aachen.DE>
* flow.c (life_analysis_1): Break out some functions.
(find_basic_blocks_1): Likewise. Also move some variables out and
make them static.
Rename NONLOCAL_LABEL_LIST arg to NONLOCAL_LABELS and initialize
new static var nonlocal_label_list with it.
(active_eh_region, nested_eh_region, label_value_list,
nonlocal_label_list): New static variables.
(make_edges, delete_unreachable_blocks, delete_block): New static
functions, broken out of find_basic_blocks_1.
(record_volatile_insns, mark_regs_live_at_end, set_noop_p,
noop_move_p): New static functions, broken out of life_analysis_1.
From-SVN: r22963
1998-10-09 17:58:37 +02:00
|
|
|
|
we end up eliminating it, it will be removed from the live list
|
|
|
|
|
of each basic block by reload. */
|
|
|
|
|
|
1999-05-31 10:43:04 +02:00
|
|
|
|
if (! reload_completed || frame_pointer_needed)
|
|
|
|
|
{
|
|
|
|
|
SET_REGNO_REG_SET (set, FRAME_POINTER_REGNUM);
|
flow.c (life_analysis_1): Break out some functions.
Fri Oct 9 15:57:51 1998 Bernd Schmidt <crux@Pool.Informatik.RWTH-Aachen.DE>
* flow.c (life_analysis_1): Break out some functions.
(find_basic_blocks_1): Likewise. Also move some variables out and
make them static.
Rename NONLOCAL_LABEL_LIST arg to NONLOCAL_LABELS and initialize
new static var nonlocal_label_list with it.
(active_eh_region, nested_eh_region, label_value_list,
nonlocal_label_list): New static variables.
(make_edges, delete_unreachable_blocks, delete_block): New static
functions, broken out of find_basic_blocks_1.
(record_volatile_insns, mark_regs_live_at_end, set_noop_p,
noop_move_p): New static functions, broken out of life_analysis_1.
From-SVN: r22963
1998-10-09 17:58:37 +02:00
|
|
|
|
#if FRAME_POINTER_REGNUM != HARD_FRAME_POINTER_REGNUM
|
1999-05-31 10:43:04 +02:00
|
|
|
|
/* If they are different, also mark the hard frame pointer as live */
|
|
|
|
|
SET_REGNO_REG_SET (set, HARD_FRAME_POINTER_REGNUM);
|
flow.c (life_analysis_1): Break out some functions.
Fri Oct 9 15:57:51 1998 Bernd Schmidt <crux@Pool.Informatik.RWTH-Aachen.DE>
* flow.c (life_analysis_1): Break out some functions.
(find_basic_blocks_1): Likewise. Also move some variables out and
make them static.
Rename NONLOCAL_LABEL_LIST arg to NONLOCAL_LABELS and initialize
new static var nonlocal_label_list with it.
(active_eh_region, nested_eh_region, label_value_list,
nonlocal_label_list): New static variables.
(make_edges, delete_unreachable_blocks, delete_block): New static
functions, broken out of find_basic_blocks_1.
(record_volatile_insns, mark_regs_live_at_end, set_noop_p,
noop_move_p): New static functions, broken out of life_analysis_1.
From-SVN: r22963
1998-10-09 17:58:37 +02:00
|
|
|
|
#endif
|
1999-05-31 10:43:04 +02:00
|
|
|
|
}
|
flow.c (life_analysis_1): Break out some functions.
Fri Oct 9 15:57:51 1998 Bernd Schmidt <crux@Pool.Informatik.RWTH-Aachen.DE>
* flow.c (life_analysis_1): Break out some functions.
(find_basic_blocks_1): Likewise. Also move some variables out and
make them static.
Rename NONLOCAL_LABEL_LIST arg to NONLOCAL_LABELS and initialize
new static var nonlocal_label_list with it.
(active_eh_region, nested_eh_region, label_value_list,
nonlocal_label_list): New static variables.
(make_edges, delete_unreachable_blocks, delete_block): New static
functions, broken out of find_basic_blocks_1.
(record_volatile_insns, mark_regs_live_at_end, set_noop_p,
noop_move_p): New static functions, broken out of life_analysis_1.
From-SVN: r22963
1998-10-09 17:58:37 +02:00
|
|
|
|
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
#ifdef PIC_OFFSET_TABLE_REGNUM
|
|
|
|
|
#ifndef PIC_OFFSET_TABLE_REG_CALL_CLOBBERED
|
|
|
|
|
/* Many architectures have a GP register even without flag_pic.
|
|
|
|
|
Assume the pic register is not in use, or will be handled by
|
|
|
|
|
other means, if it is not fixed. */
|
|
|
|
|
if (fixed_regs[PIC_OFFSET_TABLE_REGNUM])
|
|
|
|
|
SET_REGNO_REG_SET (set, PIC_OFFSET_TABLE_REGNUM);
|
|
|
|
|
#endif
|
|
|
|
|
#endif
|
|
|
|
|
|
1999-02-26 00:45:42 +01:00
|
|
|
|
/* Mark all global registers, and all registers used by the epilogue
|
flow.c (life_analysis_1): Break out some functions.
Fri Oct 9 15:57:51 1998 Bernd Schmidt <crux@Pool.Informatik.RWTH-Aachen.DE>
* flow.c (life_analysis_1): Break out some functions.
(find_basic_blocks_1): Likewise. Also move some variables out and
make them static.
Rename NONLOCAL_LABEL_LIST arg to NONLOCAL_LABELS and initialize
new static var nonlocal_label_list with it.
(active_eh_region, nested_eh_region, label_value_list,
nonlocal_label_list): New static variables.
(make_edges, delete_unreachable_blocks, delete_block): New static
functions, broken out of find_basic_blocks_1.
(record_volatile_insns, mark_regs_live_at_end, set_noop_p,
noop_move_p): New static functions, broken out of life_analysis_1.
From-SVN: r22963
1998-10-09 17:58:37 +02:00
|
|
|
|
as being live at the end of the function since they may be
|
|
|
|
|
referenced by our caller. */
|
|
|
|
|
for (i = 0; i < FIRST_PSEUDO_REGISTER; i++)
|
|
|
|
|
if (global_regs[i]
|
|
|
|
|
#ifdef EPILOGUE_USES
|
|
|
|
|
|| EPILOGUE_USES (i)
|
|
|
|
|
#endif
|
|
|
|
|
)
|
|
|
|
|
SET_REGNO_REG_SET (set, i);
|
1999-02-26 00:45:42 +01:00
|
|
|
|
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
/* Mark all call-saved registers that we actaully used. */
|
|
|
|
|
if (HAVE_epilogue && reload_completed)
|
|
|
|
|
{
|
|
|
|
|
for (i = 0; i < FIRST_PSEUDO_REGISTER; i++)
|
|
|
|
|
if (! call_used_regs[i] && regs_ever_live[i])
|
|
|
|
|
SET_REGNO_REG_SET (set, i);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Mark function return value. */
|
|
|
|
|
/* ??? Only do this after reload. Consider a non-void function that
|
|
|
|
|
omits a return statement. Across that edge we'll have the return
|
|
|
|
|
register live, and no set for it. Thus the return register will
|
|
|
|
|
be live back through the CFG to the entry, and thus we die. A
|
|
|
|
|
possible solution is to emit a clobber at exits without returns. */
|
|
|
|
|
|
|
|
|
|
type = TREE_TYPE (DECL_RESULT (current_function_decl));
|
|
|
|
|
if (reload_completed
|
|
|
|
|
&& type != void_type_node)
|
|
|
|
|
{
|
|
|
|
|
rtx outgoing;
|
|
|
|
|
|
|
|
|
|
if (current_function_returns_struct
|
|
|
|
|
|| current_function_returns_pcc_struct)
|
|
|
|
|
type = build_pointer_type (type);
|
|
|
|
|
|
|
|
|
|
#ifdef FUNCTION_OUTGOING_VALUE
|
|
|
|
|
outgoing = FUNCTION_OUTGOING_VALUE (type, current_function_decl);
|
|
|
|
|
#else
|
|
|
|
|
outgoing = FUNCTION_VALUE (type, current_function_decl);
|
|
|
|
|
#endif
|
|
|
|
|
|
|
|
|
|
if (GET_CODE (outgoing) == REG)
|
|
|
|
|
mark_reg (set, outgoing);
|
|
|
|
|
else if (GET_CODE (outgoing) == PARALLEL)
|
|
|
|
|
{
|
|
|
|
|
int len = XVECLEN (outgoing, 0);
|
|
|
|
|
|
|
|
|
|
/* Check for a NULL entry, used to indicate that the parameter
|
|
|
|
|
goes on the stack and in registers. */
|
|
|
|
|
i = (XEXP (XVECEXP (outgoing, 0, 0), 0) ? 0 : 1);
|
|
|
|
|
|
|
|
|
|
for ( ; i < len; ++i)
|
|
|
|
|
{
|
|
|
|
|
rtx r = XVECEXP (outgoing, 0, i);
|
|
|
|
|
if (GET_CODE (r) == REG)
|
|
|
|
|
mark_reg (set, r);
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
else
|
|
|
|
|
abort ();
|
|
|
|
|
}
|
flow.c (life_analysis_1): Break out some functions.
Fri Oct 9 15:57:51 1998 Bernd Schmidt <crux@Pool.Informatik.RWTH-Aachen.DE>
* flow.c (life_analysis_1): Break out some functions.
(find_basic_blocks_1): Likewise. Also move some variables out and
make them static.
Rename NONLOCAL_LABEL_LIST arg to NONLOCAL_LABELS and initialize
new static var nonlocal_label_list with it.
(active_eh_region, nested_eh_region, label_value_list,
nonlocal_label_list): New static variables.
(make_edges, delete_unreachable_blocks, delete_block): New static
functions, broken out of find_basic_blocks_1.
(record_volatile_insns, mark_regs_live_at_end, set_noop_p,
noop_move_p): New static functions, broken out of life_analysis_1.
From-SVN: r22963
1998-10-09 17:58:37 +02:00
|
|
|
|
}
|
|
|
|
|
|
1992-01-15 22:33:30 +01:00
|
|
|
|
/* Determine which registers are live at the start of each
|
|
|
|
|
basic block of the function whose first insn is F.
|
|
|
|
|
NREGS is the number of registers used in F.
|
|
|
|
|
We allocate the vector basic_block_live_at_start
|
|
|
|
|
and the regsets that it points to, and fill them with the data.
|
|
|
|
|
regset_size and regset_bytes are also set here. */
|
|
|
|
|
|
|
|
|
|
static void
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
life_analysis_1 (f, nregs, flags)
|
1992-01-15 22:33:30 +01:00
|
|
|
|
rtx f;
|
|
|
|
|
int nregs;
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
int flags;
|
1992-01-15 22:33:30 +01:00
|
|
|
|
{
|
1998-10-16 02:08:51 +02:00
|
|
|
|
char save_regs_ever_live[FIRST_PSEUDO_REGISTER];
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
register int i;
|
1992-01-15 22:33:30 +01:00
|
|
|
|
|
|
|
|
|
max_regno = nregs;
|
|
|
|
|
|
|
|
|
|
/* Allocate and zero out many data structures
|
|
|
|
|
that will record the data from lifetime analysis. */
|
|
|
|
|
|
1999-03-31 14:41:03 +02:00
|
|
|
|
allocate_reg_life_data ();
|
|
|
|
|
allocate_bb_life_data ();
|
1992-01-15 22:33:30 +01:00
|
|
|
|
|
1999-11-02 00:19:44 +01:00
|
|
|
|
reg_next_use = (rtx *) xcalloc (nregs, sizeof (rtx));
|
1992-01-15 22:33:30 +01:00
|
|
|
|
|
1998-10-12 12:06:49 +02:00
|
|
|
|
/* Assume that the stack pointer is unchanging if alloca hasn't been used.
|
|
|
|
|
This will be cleared by record_volatile_insns if it encounters an insn
|
|
|
|
|
which modifies the stack pointer. */
|
|
|
|
|
current_function_sp_is_unchanging = !current_function_calls_alloca;
|
flow.c (life_analysis_1): Break out some functions.
Fri Oct 9 15:57:51 1998 Bernd Schmidt <crux@Pool.Informatik.RWTH-Aachen.DE>
* flow.c (life_analysis_1): Break out some functions.
(find_basic_blocks_1): Likewise. Also move some variables out and
make them static.
Rename NONLOCAL_LABEL_LIST arg to NONLOCAL_LABELS and initialize
new static var nonlocal_label_list with it.
(active_eh_region, nested_eh_region, label_value_list,
nonlocal_label_list): New static variables.
(make_edges, delete_unreachable_blocks, delete_block): New static
functions, broken out of find_basic_blocks_1.
(record_volatile_insns, mark_regs_live_at_end, set_noop_p,
noop_move_p): New static functions, broken out of life_analysis_1.
From-SVN: r22963
1998-10-09 17:58:37 +02:00
|
|
|
|
record_volatile_insns (f);
|
1992-10-30 03:55:53 +01:00
|
|
|
|
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
/* Find the set of registers live on function exit. Do this before
|
|
|
|
|
zeroing regs_ever_live, as we use that data post-reload. */
|
|
|
|
|
mark_regs_live_at_end (EXIT_BLOCK_PTR->global_live_at_start);
|
1999-02-26 00:45:42 +01:00
|
|
|
|
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
/* The post-reload life analysis have (on a global basis) the same
|
|
|
|
|
registers live as was computed by reload itself. elimination
|
|
|
|
|
Otherwise offsets and such may be incorrect.
|
1999-02-26 00:45:42 +01:00
|
|
|
|
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
Reload will make some registers as live even though they do not
|
|
|
|
|
appear in the rtl. */
|
1999-02-26 00:45:42 +01:00
|
|
|
|
if (reload_completed)
|
|
|
|
|
memcpy (save_regs_ever_live, regs_ever_live, sizeof (regs_ever_live));
|
|
|
|
|
memset (regs_ever_live, 0, sizeof regs_ever_live);
|
|
|
|
|
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
/* Compute register life at block boundaries. It'd be nice to
|
|
|
|
|
begin with just the exit and noreturn blocks, but that set
|
|
|
|
|
is not immediately handy. */
|
|
|
|
|
{
|
|
|
|
|
sbitmap blocks;
|
|
|
|
|
blocks = sbitmap_alloc (n_basic_blocks);
|
|
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|
|
sbitmap_ones (blocks);
|
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|
|
calculate_global_regs_live (blocks, blocks, flags & PROP_SCAN_DEAD_CODE);
|
1999-11-05 01:49:03 +01:00
|
|
|
|
sbitmap_free (blocks);
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
}
|
1992-01-15 22:33:30 +01:00
|
|
|
|
|
|
|
|
|
/* The only pseudos that are live at the beginning of the function are
|
|
|
|
|
those that were not set anywhere in the function. local-alloc doesn't
|
|
|
|
|
know how to handle these correctly, so mark them as not local to any
|
|
|
|
|
one basic block. */
|
|
|
|
|
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
EXECUTE_IF_SET_IN_REG_SET (ENTRY_BLOCK_PTR->global_live_at_end,
|
|
|
|
|
FIRST_PSEUDO_REGISTER, i,
|
|
|
|
|
{ REG_BASIC_BLOCK (i) = REG_BLOCK_GLOBAL; });
|
1992-01-15 22:33:30 +01:00
|
|
|
|
|
1999-02-26 00:45:42 +01:00
|
|
|
|
/* Now the life information is accurate. Make one more pass over each
|
|
|
|
|
basic block to delete dead stores, create autoincrement addressing
|
|
|
|
|
and record how many times each register is used, is set, or dies. */
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
{
|
|
|
|
|
regset tmp;
|
|
|
|
|
tmp = ALLOCA_REG_SET ();
|
1992-01-15 22:33:30 +01:00
|
|
|
|
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
for (i = n_basic_blocks - 1; i >= 0; --i)
|
|
|
|
|
{
|
|
|
|
|
basic_block bb = BASIC_BLOCK (i);
|
1999-02-26 00:45:42 +01:00
|
|
|
|
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
COPY_REG_SET (tmp, bb->global_live_at_end);
|
|
|
|
|
propagate_block (tmp, bb->head, bb->end, (regset) NULL, i, flags);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
FREE_REG_SET (tmp);
|
|
|
|
|
}
|
1992-01-15 22:33:30 +01:00
|
|
|
|
|
1999-02-26 00:45:42 +01:00
|
|
|
|
/* We have a problem with any pseudoreg that lives across the setjmp.
|
|
|
|
|
ANSI says that if a user variable does not change in value between
|
|
|
|
|
the setjmp and the longjmp, then the longjmp preserves it. This
|
|
|
|
|
includes longjmp from a place where the pseudo appears dead.
|
1992-01-15 22:33:30 +01:00
|
|
|
|
(In principle, the value still exists if it is in scope.)
|
|
|
|
|
If the pseudo goes in a hard reg, some other value may occupy
|
|
|
|
|
that hard reg where this pseudo is dead, thus clobbering the pseudo.
|
|
|
|
|
Conclusion: such a pseudo must not go in a hard reg. */
|
1997-06-05 12:24:03 +02:00
|
|
|
|
EXECUTE_IF_SET_IN_REG_SET (regs_live_at_setjmp,
|
|
|
|
|
FIRST_PSEUDO_REGISTER, i,
|
|
|
|
|
{
|
|
|
|
|
if (regno_reg_rtx[i] != 0)
|
|
|
|
|
{
|
|
|
|
|
REG_LIVE_LENGTH (i) = -1;
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
REG_BASIC_BLOCK (i) = REG_BLOCK_UNKNOWN;
|
1997-06-05 12:24:03 +02:00
|
|
|
|
}
|
|
|
|
|
});
|
1992-01-15 22:33:30 +01:00
|
|
|
|
|
1998-10-16 02:08:51 +02:00
|
|
|
|
/* Restore regs_ever_live that was provided by reload. */
|
|
|
|
|
if (reload_completed)
|
1999-02-26 00:45:42 +01:00
|
|
|
|
memcpy (regs_ever_live, save_regs_ever_live, sizeof (regs_ever_live));
|
1997-07-14 12:49:58 +02:00
|
|
|
|
|
1999-11-02 00:19:44 +01:00
|
|
|
|
/* Clean up. */
|
|
|
|
|
free (reg_next_use);
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
reg_next_use = NULL;
|
|
|
|
|
}
|
1999-02-26 00:45:42 +01:00
|
|
|
|
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
/* Propagate global life info around the graph of basic blocks. Begin
|
|
|
|
|
considering blocks with their corresponding bit set in BLOCKS_IN.
|
|
|
|
|
BLOCKS_OUT is set for every block that was changed. */
|
|
|
|
|
|
|
|
|
|
static void
|
|
|
|
|
calculate_global_regs_live (blocks_in, blocks_out, flags)
|
|
|
|
|
sbitmap blocks_in, blocks_out;
|
|
|
|
|
int flags;
|
|
|
|
|
{
|
|
|
|
|
basic_block *queue, *qhead, *qtail, *qend;
|
|
|
|
|
regset tmp, new_live_at_end;
|
|
|
|
|
int i;
|
|
|
|
|
|
|
|
|
|
tmp = ALLOCA_REG_SET ();
|
|
|
|
|
new_live_at_end = ALLOCA_REG_SET ();
|
|
|
|
|
|
|
|
|
|
/* Create a worklist. Allocate an extra slot for ENTRY_BLOCK, and one
|
|
|
|
|
because the `head == tail' style test for an empty queue doesn't
|
|
|
|
|
work with a full queue. */
|
1999-11-02 00:19:44 +01:00
|
|
|
|
queue = (basic_block *) xmalloc ((n_basic_blocks + 2) * sizeof (*queue));
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
qtail = queue;
|
|
|
|
|
qhead = qend = queue + n_basic_blocks + 2;
|
|
|
|
|
|
1999-11-16 05:51:28 +01:00
|
|
|
|
/* Clear out the garbage that might be hanging out in bb->aux. */
|
|
|
|
|
for (i = n_basic_blocks - 1; i >= 0; --i)
|
|
|
|
|
BASIC_BLOCK (i)->aux = NULL;
|
|
|
|
|
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
/* Queue the blocks set in the initial mask. Do this in reverse block
|
|
|
|
|
number order so that we are more likely for the first round to do
|
|
|
|
|
useful work. We use AUX non-null to flag that the block is queued. */
|
|
|
|
|
EXECUTE_IF_SET_IN_SBITMAP (blocks_in, 0, i,
|
|
|
|
|
{
|
|
|
|
|
basic_block bb = BASIC_BLOCK (i);
|
|
|
|
|
*--qhead = bb;
|
|
|
|
|
bb->aux = bb;
|
|
|
|
|
});
|
|
|
|
|
|
|
|
|
|
sbitmap_zero (blocks_out);
|
|
|
|
|
|
|
|
|
|
while (qhead != qtail)
|
|
|
|
|
{
|
|
|
|
|
int rescan, changed;
|
|
|
|
|
basic_block bb;
|
|
|
|
|
edge e;
|
|
|
|
|
|
|
|
|
|
bb = *qhead++;
|
|
|
|
|
if (qhead == qend)
|
|
|
|
|
qhead = queue;
|
|
|
|
|
bb->aux = NULL;
|
|
|
|
|
|
|
|
|
|
/* Begin by propogating live_at_start from the successor blocks. */
|
|
|
|
|
CLEAR_REG_SET (new_live_at_end);
|
|
|
|
|
for (e = bb->succ; e ; e = e->succ_next)
|
|
|
|
|
{
|
|
|
|
|
basic_block sb = e->dest;
|
|
|
|
|
IOR_REG_SET (new_live_at_end, sb->global_live_at_start);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (bb == ENTRY_BLOCK_PTR)
|
|
|
|
|
{
|
|
|
|
|
COPY_REG_SET (bb->global_live_at_end, new_live_at_end);
|
|
|
|
|
continue;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* On our first pass through this block, we'll go ahead and continue.
|
|
|
|
|
Recognize first pass by local_set NULL. On subsequent passes, we
|
|
|
|
|
get to skip out early if live_at_end wouldn't have changed. */
|
|
|
|
|
|
|
|
|
|
if (bb->local_set == NULL)
|
|
|
|
|
{
|
|
|
|
|
bb->local_set = OBSTACK_ALLOC_REG_SET (function_obstack);
|
|
|
|
|
rescan = 1;
|
|
|
|
|
}
|
|
|
|
|
else
|
|
|
|
|
{
|
|
|
|
|
/* If any bits were removed from live_at_end, we'll have to
|
|
|
|
|
rescan the block. This wouldn't be necessary if we had
|
|
|
|
|
precalculated local_live, however with PROP_SCAN_DEAD_CODE
|
|
|
|
|
local_live is really dependant on live_at_end. */
|
|
|
|
|
CLEAR_REG_SET (tmp);
|
|
|
|
|
rescan = bitmap_operation (tmp, bb->global_live_at_end,
|
|
|
|
|
new_live_at_end, BITMAP_AND_COMPL);
|
|
|
|
|
|
|
|
|
|
if (! rescan)
|
|
|
|
|
{
|
|
|
|
|
/* Find the set of changed bits. Take this opportunity
|
|
|
|
|
to notice that this set is empty and early out. */
|
|
|
|
|
CLEAR_REG_SET (tmp);
|
|
|
|
|
changed = bitmap_operation (tmp, bb->global_live_at_end,
|
|
|
|
|
new_live_at_end, BITMAP_XOR);
|
|
|
|
|
if (! changed)
|
|
|
|
|
continue;
|
|
|
|
|
|
|
|
|
|
/* If any of the changed bits overlap with local_set,
|
|
|
|
|
we'll have to rescan the block. Detect overlap by
|
|
|
|
|
the AND with ~local_set turning off bits. */
|
|
|
|
|
rescan = bitmap_operation (tmp, tmp, bb->local_set,
|
|
|
|
|
BITMAP_AND_COMPL);
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Let our caller know that BB changed enough to require its
|
|
|
|
|
death notes updated. */
|
|
|
|
|
SET_BIT (blocks_out, bb->index);
|
|
|
|
|
|
|
|
|
|
if (! rescan)
|
|
|
|
|
{
|
|
|
|
|
/* Add to live_at_start the set of all registers in
|
|
|
|
|
new_live_at_end that aren't in the old live_at_end. */
|
|
|
|
|
|
|
|
|
|
bitmap_operation (tmp, new_live_at_end, bb->global_live_at_end,
|
|
|
|
|
BITMAP_AND_COMPL);
|
|
|
|
|
COPY_REG_SET (bb->global_live_at_end, new_live_at_end);
|
|
|
|
|
|
|
|
|
|
changed = bitmap_operation (bb->global_live_at_start,
|
|
|
|
|
bb->global_live_at_start,
|
|
|
|
|
tmp, BITMAP_IOR);
|
|
|
|
|
if (! changed)
|
|
|
|
|
continue;
|
|
|
|
|
}
|
|
|
|
|
else
|
|
|
|
|
{
|
|
|
|
|
COPY_REG_SET (bb->global_live_at_end, new_live_at_end);
|
|
|
|
|
|
|
|
|
|
/* Rescan the block insn by insn to turn (a copy of) live_at_end
|
|
|
|
|
into live_at_start. */
|
|
|
|
|
propagate_block (new_live_at_end, bb->head, bb->end,
|
1999-11-01 09:53:40 +01:00
|
|
|
|
bb->local_set, bb->index, flags);
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
|
|
|
|
|
/* If live_at start didn't change, no need to go farther. */
|
|
|
|
|
if (REG_SET_EQUAL_P (bb->global_live_at_start, new_live_at_end))
|
|
|
|
|
continue;
|
|
|
|
|
|
|
|
|
|
COPY_REG_SET (bb->global_live_at_start, new_live_at_end);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Queue all predecessors of BB so that we may re-examine
|
|
|
|
|
their live_at_end. */
|
|
|
|
|
for (e = bb->pred; e ; e = e->pred_next)
|
|
|
|
|
{
|
|
|
|
|
basic_block pb = e->src;
|
|
|
|
|
if (pb->aux == NULL)
|
|
|
|
|
{
|
|
|
|
|
*qtail++ = pb;
|
|
|
|
|
if (qtail == qend)
|
|
|
|
|
qtail = queue;
|
|
|
|
|
pb->aux = pb;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
FREE_REG_SET (tmp);
|
|
|
|
|
FREE_REG_SET (new_live_at_end);
|
|
|
|
|
|
|
|
|
|
EXECUTE_IF_SET_IN_SBITMAP (blocks_out, 0, i,
|
|
|
|
|
{
|
|
|
|
|
basic_block bb = BASIC_BLOCK (i);
|
|
|
|
|
FREE_REG_SET (bb->local_set);
|
|
|
|
|
});
|
1999-11-02 00:19:44 +01:00
|
|
|
|
|
|
|
|
|
free (queue);
|
1992-01-15 22:33:30 +01:00
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Subroutines of life analysis. */
|
|
|
|
|
|
|
|
|
|
/* Allocate the permanent data structures that represent the results
|
|
|
|
|
of life analysis. Not static since used also for stupid life analysis. */
|
|
|
|
|
|
|
|
|
|
void
|
1999-03-31 14:41:03 +02:00
|
|
|
|
allocate_bb_life_data ()
|
1992-01-15 22:33:30 +01:00
|
|
|
|
{
|
|
|
|
|
register int i;
|
|
|
|
|
|
1999-02-26 00:45:42 +01:00
|
|
|
|
for (i = 0; i < n_basic_blocks; i++)
|
|
|
|
|
{
|
|
|
|
|
basic_block bb = BASIC_BLOCK (i);
|
|
|
|
|
|
|
|
|
|
bb->global_live_at_start = OBSTACK_ALLOC_REG_SET (function_obstack);
|
|
|
|
|
bb->global_live_at_end = OBSTACK_ALLOC_REG_SET (function_obstack);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
ENTRY_BLOCK_PTR->global_live_at_end
|
|
|
|
|
= OBSTACK_ALLOC_REG_SET (function_obstack);
|
|
|
|
|
EXIT_BLOCK_PTR->global_live_at_start
|
|
|
|
|
= OBSTACK_ALLOC_REG_SET (function_obstack);
|
1992-01-15 22:33:30 +01:00
|
|
|
|
|
1997-06-05 22:35:53 +02:00
|
|
|
|
regs_live_at_setjmp = OBSTACK_ALLOC_REG_SET (function_obstack);
|
1999-03-31 14:41:03 +02:00
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
void
|
|
|
|
|
allocate_reg_life_data ()
|
|
|
|
|
{
|
|
|
|
|
int i;
|
|
|
|
|
|
|
|
|
|
/* Recalculate the register space, in case it has grown. Old style
|
|
|
|
|
vector oriented regsets would set regset_{size,bytes} here also. */
|
|
|
|
|
allocate_reg_info (max_regno, FALSE, FALSE);
|
|
|
|
|
|
1999-10-20 16:04:12 +02:00
|
|
|
|
/* Reset all the data we'll collect in propagate_block and its
|
|
|
|
|
subroutines. */
|
1999-03-31 14:41:03 +02:00
|
|
|
|
for (i = 0; i < max_regno; i++)
|
1999-10-20 16:04:12 +02:00
|
|
|
|
{
|
|
|
|
|
REG_N_SETS (i) = 0;
|
|
|
|
|
REG_N_REFS (i) = 0;
|
|
|
|
|
REG_N_DEATHS (i) = 0;
|
|
|
|
|
REG_N_CALLS_CROSSED (i) = 0;
|
|
|
|
|
REG_LIVE_LENGTH (i) = 0;
|
|
|
|
|
REG_BASIC_BLOCK (i) = REG_BLOCK_UNKNOWN;
|
|
|
|
|
}
|
1992-01-15 22:33:30 +01:00
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Compute the registers live at the beginning of a basic block
|
|
|
|
|
from those live at the end.
|
|
|
|
|
|
|
|
|
|
When called, OLD contains those live at the end.
|
|
|
|
|
On return, it contains those live at the beginning.
|
|
|
|
|
FIRST and LAST are the first and last insns of the basic block.
|
|
|
|
|
|
|
|
|
|
FINAL is nonzero if we are doing the final pass which is not
|
|
|
|
|
for computing the life info (since that has already been done)
|
|
|
|
|
but for acting on it. On this pass, we delete dead stores,
|
|
|
|
|
set up the logical links and dead-variables lists of instructions,
|
|
|
|
|
and merge instructions for autoincrement and autodecrement addresses.
|
|
|
|
|
|
|
|
|
|
SIGNIFICANT is nonzero only the first time for each basic block.
|
|
|
|
|
If it is nonzero, it points to a regset in which we store
|
|
|
|
|
a 1 for each register that is set within the block.
|
|
|
|
|
|
|
|
|
|
BNUM is the number of the basic block. */
|
|
|
|
|
|
|
|
|
|
static void
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
propagate_block (old, first, last, significant, bnum, flags)
|
1992-01-15 22:33:30 +01:00
|
|
|
|
register regset old;
|
|
|
|
|
rtx first;
|
|
|
|
|
rtx last;
|
|
|
|
|
regset significant;
|
|
|
|
|
int bnum;
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
int flags;
|
1992-01-15 22:33:30 +01:00
|
|
|
|
{
|
|
|
|
|
register rtx insn;
|
|
|
|
|
rtx prev;
|
|
|
|
|
regset live;
|
|
|
|
|
regset dead;
|
|
|
|
|
|
1999-02-26 00:45:42 +01:00
|
|
|
|
/* Find the loop depth for this block. Ignore loop level changes in the
|
|
|
|
|
middle of the basic block -- for register allocation purposes, the
|
|
|
|
|
important uses will be in the blocks wholely contained within the loop
|
|
|
|
|
not in the loop pre-header or post-trailer. */
|
|
|
|
|
loop_depth = BASIC_BLOCK (bnum)->loop_depth;
|
1992-01-15 22:33:30 +01:00
|
|
|
|
|
1997-06-05 22:35:53 +02:00
|
|
|
|
dead = ALLOCA_REG_SET ();
|
|
|
|
|
live = ALLOCA_REG_SET ();
|
1992-01-15 22:33:30 +01:00
|
|
|
|
|
|
|
|
|
cc0_live = 0;
|
|
|
|
|
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
if (flags & PROP_REG_INFO)
|
1992-01-15 22:33:30 +01:00
|
|
|
|
{
|
1997-06-05 12:24:03 +02:00
|
|
|
|
register int i;
|
1992-01-15 22:33:30 +01:00
|
|
|
|
|
|
|
|
|
/* Process the regs live at the end of the block.
|
1998-10-17 03:38:15 +02:00
|
|
|
|
Mark them as not local to any one basic block. */
|
1997-06-05 12:24:03 +02:00
|
|
|
|
EXECUTE_IF_SET_IN_REG_SET (old, 0, i,
|
|
|
|
|
{
|
|
|
|
|
REG_BASIC_BLOCK (i) = REG_BLOCK_GLOBAL;
|
|
|
|
|
});
|
1992-01-15 22:33:30 +01:00
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Scan the block an insn at a time from end to beginning. */
|
|
|
|
|
|
|
|
|
|
for (insn = last; ; insn = prev)
|
|
|
|
|
{
|
|
|
|
|
prev = PREV_INSN (insn);
|
|
|
|
|
|
1994-11-15 16:38:07 +01:00
|
|
|
|
if (GET_CODE (insn) == NOTE)
|
1992-01-15 22:33:30 +01:00
|
|
|
|
{
|
1994-11-15 16:38:07 +01:00
|
|
|
|
/* If this is a call to `setjmp' et al,
|
|
|
|
|
warn if any non-volatile datum is live. */
|
|
|
|
|
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
if ((flags & PROP_REG_INFO)
|
|
|
|
|
&& NOTE_LINE_NUMBER (insn) == NOTE_INSN_SETJMP)
|
1997-06-05 12:24:03 +02:00
|
|
|
|
IOR_REG_SET (regs_live_at_setjmp, old);
|
1992-01-15 22:33:30 +01:00
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Update the life-status of regs for this insn.
|
|
|
|
|
First DEAD gets which regs are set in this insn
|
|
|
|
|
then LIVE gets which regs are used in this insn.
|
|
|
|
|
Then the regs live before the insn
|
|
|
|
|
are those live after, with DEAD regs turned off,
|
|
|
|
|
and then LIVE regs turned on. */
|
|
|
|
|
|
1994-11-15 16:38:07 +01:00
|
|
|
|
else if (GET_RTX_CLASS (GET_CODE (insn)) == 'i')
|
1992-01-15 22:33:30 +01:00
|
|
|
|
{
|
|
|
|
|
register int i;
|
1992-07-06 22:04:00 +02:00
|
|
|
|
rtx note = find_reg_note (insn, REG_RETVAL, NULL_RTX);
|
1999-04-11 00:53:08 +02:00
|
|
|
|
int insn_is_dead = 0;
|
|
|
|
|
int libcall_is_dead = 0;
|
|
|
|
|
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
if (flags & PROP_SCAN_DEAD_CODE)
|
1999-04-11 00:53:08 +02:00
|
|
|
|
{
|
|
|
|
|
insn_is_dead = (insn_dead_p (PATTERN (insn), old, 0, REG_NOTES (insn))
|
|
|
|
|
/* Don't delete something that refers to volatile storage! */
|
|
|
|
|
&& ! INSN_VOLATILE (insn));
|
|
|
|
|
libcall_is_dead = (insn_is_dead && note != 0
|
|
|
|
|
&& libcall_dead_p (PATTERN (insn), old, note, insn));
|
|
|
|
|
}
|
1992-01-15 22:33:30 +01:00
|
|
|
|
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
/* We almost certainly don't want to delete prologue or epilogue
|
|
|
|
|
instructions. Warn about probable compiler losage. */
|
|
|
|
|
if ((flags & PROP_KILL_DEAD_CODE)
|
|
|
|
|
&& insn_is_dead
|
|
|
|
|
&& reload_completed
|
|
|
|
|
&& (HAVE_epilogue || HAVE_prologue)
|
|
|
|
|
&& prologue_epilogue_contains (insn))
|
|
|
|
|
{
|
|
|
|
|
warning ("ICE: would have deleted prologue/epilogue insn");
|
|
|
|
|
debug_rtx (insn);
|
|
|
|
|
libcall_is_dead = insn_is_dead = 0;
|
|
|
|
|
}
|
|
|
|
|
|
1992-01-15 22:33:30 +01:00
|
|
|
|
/* If an instruction consists of just dead store(s) on final pass,
|
|
|
|
|
"delete" it by turning it into a NOTE of type NOTE_INSN_DELETED.
|
|
|
|
|
We could really delete it with delete_insn, but that
|
|
|
|
|
can cause trouble for first or last insn in a basic block. */
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
if ((flags & PROP_KILL_DEAD_CODE) && insn_is_dead)
|
1992-01-15 22:33:30 +01:00
|
|
|
|
{
|
1999-10-28 22:37:37 +02:00
|
|
|
|
rtx inote;
|
|
|
|
|
/* If the insn referred to a label, note that the label is
|
|
|
|
|
now less used. */
|
|
|
|
|
for (inote = REG_NOTES (insn); inote; inote = XEXP (inote, 1))
|
|
|
|
|
{
|
|
|
|
|
if (REG_NOTE_KIND (inote) == REG_LABEL)
|
|
|
|
|
{
|
|
|
|
|
rtx label = XEXP (inote, 0);
|
|
|
|
|
rtx next;
|
|
|
|
|
LABEL_NUSES (label)--;
|
|
|
|
|
|
|
|
|
|
/* If this label was attached to an ADDR_VEC, it's
|
|
|
|
|
safe to delete the ADDR_VEC. In fact, it's pretty much
|
|
|
|
|
mandatory to delete it, because the ADDR_VEC may
|
|
|
|
|
be referencing labels that no longer exist. */
|
|
|
|
|
if (LABEL_NUSES (label) == 0
|
|
|
|
|
&& (next = next_nonnote_insn (label)) != NULL
|
|
|
|
|
&& GET_CODE (next) == JUMP_INSN
|
|
|
|
|
&& (GET_CODE (PATTERN (next)) == ADDR_VEC
|
|
|
|
|
|| GET_CODE (PATTERN (next)) == ADDR_DIFF_VEC))
|
|
|
|
|
{
|
|
|
|
|
rtx pat = PATTERN (next);
|
|
|
|
|
int diff_vec_p = GET_CODE (pat) == ADDR_DIFF_VEC;
|
|
|
|
|
int len = XVECLEN (pat, diff_vec_p);
|
|
|
|
|
int i;
|
|
|
|
|
for (i = 0; i < len; i++)
|
|
|
|
|
LABEL_NUSES (XEXP (XVECEXP (pat, diff_vec_p, i), 0))--;
|
|
|
|
|
PUT_CODE (next, NOTE);
|
|
|
|
|
NOTE_LINE_NUMBER (next) = NOTE_INSN_DELETED;
|
|
|
|
|
NOTE_SOURCE_FILE (next) = 0;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
1992-01-15 22:33:30 +01:00
|
|
|
|
PUT_CODE (insn, NOTE);
|
|
|
|
|
NOTE_LINE_NUMBER (insn) = NOTE_INSN_DELETED;
|
|
|
|
|
NOTE_SOURCE_FILE (insn) = 0;
|
|
|
|
|
|
1992-03-12 01:23:42 +01:00
|
|
|
|
/* CC0 is now known to be dead. Either this insn used it,
|
|
|
|
|
in which case it doesn't anymore, or clobbered it,
|
|
|
|
|
so the next insn can't use it. */
|
|
|
|
|
cc0_live = 0;
|
|
|
|
|
|
1992-01-15 22:33:30 +01:00
|
|
|
|
/* If this insn is copying the return value from a library call,
|
|
|
|
|
delete the entire library call. */
|
|
|
|
|
if (libcall_is_dead)
|
|
|
|
|
{
|
|
|
|
|
rtx first = XEXP (note, 0);
|
|
|
|
|
rtx p = insn;
|
|
|
|
|
while (INSN_DELETED_P (first))
|
|
|
|
|
first = NEXT_INSN (first);
|
|
|
|
|
while (p != first)
|
|
|
|
|
{
|
|
|
|
|
p = PREV_INSN (p);
|
|
|
|
|
PUT_CODE (p, NOTE);
|
|
|
|
|
NOTE_LINE_NUMBER (p) = NOTE_INSN_DELETED;
|
|
|
|
|
NOTE_SOURCE_FILE (p) = 0;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
goto flushed;
|
|
|
|
|
}
|
|
|
|
|
|
1997-06-05 12:24:03 +02:00
|
|
|
|
CLEAR_REG_SET (dead);
|
|
|
|
|
CLEAR_REG_SET (live);
|
1992-01-15 22:33:30 +01:00
|
|
|
|
|
|
|
|
|
/* See if this is an increment or decrement that can be
|
|
|
|
|
merged into a following memory address. */
|
|
|
|
|
#ifdef AUTO_INC_DEC
|
|
|
|
|
{
|
1997-12-07 01:31:01 +01:00
|
|
|
|
register rtx x = single_set (insn);
|
|
|
|
|
|
1992-01-15 22:33:30 +01:00
|
|
|
|
/* Does this instruction increment or decrement a register? */
|
1998-10-16 02:08:51 +02:00
|
|
|
|
if (!reload_completed
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
&& (flags & PROP_AUTOINC)
|
|
|
|
|
&& x != 0
|
1992-01-15 22:33:30 +01:00
|
|
|
|
&& GET_CODE (SET_DEST (x)) == REG
|
|
|
|
|
&& (GET_CODE (SET_SRC (x)) == PLUS
|
|
|
|
|
|| GET_CODE (SET_SRC (x)) == MINUS)
|
|
|
|
|
&& XEXP (SET_SRC (x), 0) == SET_DEST (x)
|
|
|
|
|
&& GET_CODE (XEXP (SET_SRC (x), 1)) == CONST_INT
|
|
|
|
|
/* Ok, look for a following memory ref we can combine with.
|
|
|
|
|
If one is found, change the memory ref to a PRE_INC
|
|
|
|
|
or PRE_DEC, cancel this insn, and return 1.
|
|
|
|
|
Return 0 if nothing has been done. */
|
|
|
|
|
&& try_pre_increment_1 (insn))
|
|
|
|
|
goto flushed;
|
|
|
|
|
}
|
|
|
|
|
#endif /* AUTO_INC_DEC */
|
|
|
|
|
|
|
|
|
|
/* If this is not the final pass, and this insn is copying the
|
|
|
|
|
value of a library call and it's dead, don't scan the
|
|
|
|
|
insns that perform the library call, so that the call's
|
|
|
|
|
arguments are not marked live. */
|
|
|
|
|
if (libcall_is_dead)
|
|
|
|
|
{
|
|
|
|
|
/* Mark the dest reg as `significant'. */
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
mark_set_regs (old, dead, PATTERN (insn), NULL_RTX,
|
|
|
|
|
significant, flags);
|
1992-01-15 22:33:30 +01:00
|
|
|
|
|
|
|
|
|
insn = XEXP (note, 0);
|
|
|
|
|
prev = PREV_INSN (insn);
|
|
|
|
|
}
|
|
|
|
|
else if (GET_CODE (PATTERN (insn)) == SET
|
|
|
|
|
&& SET_DEST (PATTERN (insn)) == stack_pointer_rtx
|
|
|
|
|
&& GET_CODE (SET_SRC (PATTERN (insn))) == PLUS
|
|
|
|
|
&& XEXP (SET_SRC (PATTERN (insn)), 0) == stack_pointer_rtx
|
|
|
|
|
&& GET_CODE (XEXP (SET_SRC (PATTERN (insn)), 1)) == CONST_INT)
|
|
|
|
|
/* We have an insn to pop a constant amount off the stack.
|
|
|
|
|
(Such insns use PLUS regardless of the direction of the stack,
|
|
|
|
|
and any insn to adjust the stack by a constant is always a pop.)
|
|
|
|
|
These insns, if not dead stores, have no effect on life. */
|
|
|
|
|
;
|
|
|
|
|
else
|
|
|
|
|
{
|
1998-10-17 03:38:15 +02:00
|
|
|
|
/* Any regs live at the time of a call instruction
|
|
|
|
|
must not go in a register clobbered by calls.
|
|
|
|
|
Find all regs now live and record this for them. */
|
|
|
|
|
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
if (GET_CODE (insn) == CALL_INSN
|
|
|
|
|
&& (flags & PROP_REG_INFO))
|
1998-10-17 03:38:15 +02:00
|
|
|
|
EXECUTE_IF_SET_IN_REG_SET (old, 0, i,
|
|
|
|
|
{
|
|
|
|
|
REG_N_CALLS_CROSSED (i)++;
|
|
|
|
|
});
|
|
|
|
|
|
1992-01-15 22:33:30 +01:00
|
|
|
|
/* LIVE gets the regs used in INSN;
|
|
|
|
|
DEAD gets those set by it. Dead insns don't make anything
|
|
|
|
|
live. */
|
|
|
|
|
|
1992-07-06 22:04:00 +02:00
|
|
|
|
mark_set_regs (old, dead, PATTERN (insn),
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
insn, significant, flags);
|
1992-01-15 22:33:30 +01:00
|
|
|
|
|
|
|
|
|
/* If an insn doesn't use CC0, it becomes dead since we
|
|
|
|
|
assume that every insn clobbers it. So show it dead here;
|
|
|
|
|
mark_used_regs will set it live if it is referenced. */
|
|
|
|
|
cc0_live = 0;
|
|
|
|
|
|
|
|
|
|
if (! insn_is_dead)
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
mark_used_regs (old, live, PATTERN (insn), flags, insn);
|
1992-01-15 22:33:30 +01:00
|
|
|
|
|
|
|
|
|
/* Sometimes we may have inserted something before INSN (such as
|
|
|
|
|
a move) when we make an auto-inc. So ensure we will scan
|
|
|
|
|
those insns. */
|
|
|
|
|
#ifdef AUTO_INC_DEC
|
|
|
|
|
prev = PREV_INSN (insn);
|
|
|
|
|
#endif
|
|
|
|
|
|
|
|
|
|
if (! insn_is_dead && GET_CODE (insn) == CALL_INSN)
|
|
|
|
|
{
|
|
|
|
|
register int i;
|
|
|
|
|
|
1994-05-06 23:48:55 +02:00
|
|
|
|
rtx note;
|
|
|
|
|
|
|
|
|
|
for (note = CALL_INSN_FUNCTION_USAGE (insn);
|
|
|
|
|
note;
|
|
|
|
|
note = XEXP (note, 1))
|
|
|
|
|
if (GET_CODE (XEXP (note, 0)) == USE)
|
flow.c (propagate_block): Use XEXP not SET_DEST for a USE.
* flow.c (propagate_block): Use XEXP not SET_DEST for a USE.
(recompute_reg_usage): Likewise.
* rtlanal.c (find_regno_fusage): Likewise.
* rtl.c (rtl_check_failed_code1): New function.
(rtl_check_failed_code2): New.
* rtl.h (RTL_CHECK1, RTL_CHECK2, RTVEC_ELT): Parenthesize args.
(RTL_CHECKC1, RTL_CHECKC2): New.
(XC*): New accessor macros.
(NOTE_*, LABEL_NAME, LABEL_NUSES, ADDRESSOF_REGNO): Use them.
(ADDRESSOF_DECL, JUMP_LABEL, LABEL_REFS, LABEL_NEXTREF): Likewise.
(CONTAINING_INSN, REGNO, INTVAL, SUBREG_REG, SUBREG_WORD): Likewise.
(ASM_OPERANDS_*, MEM_ALIAS_SET, SET_SRC, SET_DEST): Likewise.
(TRAP_*, RANGE_INFO_*): Likewise.
From-SVN: r29089
1999-09-04 00:23:11 +02:00
|
|
|
|
mark_used_regs (old, live, XEXP (XEXP (note, 0), 0),
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
flags, insn);
|
1994-05-06 23:48:55 +02:00
|
|
|
|
|
1992-01-15 22:33:30 +01:00
|
|
|
|
/* Each call clobbers all call-clobbered regs that are not
|
1996-03-31 12:10:01 +02:00
|
|
|
|
global or fixed. Note that the function-value reg is a
|
1992-01-15 22:33:30 +01:00
|
|
|
|
call-clobbered reg, and mark_set_regs has already had
|
|
|
|
|
a chance to handle it. */
|
|
|
|
|
|
|
|
|
|
for (i = 0; i < FIRST_PSEUDO_REGISTER; i++)
|
1996-03-31 12:10:01 +02:00
|
|
|
|
if (call_used_regs[i] && ! global_regs[i]
|
|
|
|
|
&& ! fixed_regs[i])
|
1999-10-15 01:28:50 +02:00
|
|
|
|
{
|
|
|
|
|
SET_REGNO_REG_SET (dead, i);
|
|
|
|
|
if (significant)
|
|
|
|
|
SET_REGNO_REG_SET (significant, i);
|
|
|
|
|
}
|
1992-01-15 22:33:30 +01:00
|
|
|
|
|
|
|
|
|
/* The stack ptr is used (honorarily) by a CALL insn. */
|
1997-06-05 12:24:03 +02:00
|
|
|
|
SET_REGNO_REG_SET (live, STACK_POINTER_REGNUM);
|
1992-01-15 22:33:30 +01:00
|
|
|
|
|
|
|
|
|
/* Calls may also reference any of the global registers,
|
|
|
|
|
so they are made live. */
|
|
|
|
|
for (i = 0; i < FIRST_PSEUDO_REGISTER; i++)
|
|
|
|
|
if (global_regs[i])
|
1994-10-19 00:09:53 +01:00
|
|
|
|
mark_used_regs (old, live,
|
alias.c: Change all uses of gen_rtx(FOO...) to gen_rtx_FOO...
* alias.c: Change all uses of gen_rtx(FOO...) to gen_rtx_FOO;
change gen_rtx(expr...) to gen_rtx_fmt_foo(expr...).
* caller-save.c, calls.c, combine.c, cse.c: Likewise.
* dwarf2out.c, except.c, explow.c, expmed.c, expr.c: Likewise.
* final.c, flow.c, function.c, genpeep.c, haifa-sched.c: Likewise.
* halfpic.c, integrate.c, jump.c, local-alloc.c, loop.c: Likewise.
* profile.c, recog.c, reg-stack.c, regclass.c, regmove.c: Likewise.
* reload.c, reload1.c, reorg.c, sched.c, stmt.c, stupid.c: Likewise.
* unroll.c, varasm.c: Likewise.
* config/alpha/alpha.c, config/alpha/alpha.md: Likewise.
From-SVN: r17357
1998-01-15 00:10:50 +01:00
|
|
|
|
gen_rtx_REG (reg_raw_mode[i], i),
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
flags, insn);
|
1992-01-15 22:33:30 +01:00
|
|
|
|
|
|
|
|
|
/* Calls also clobber memory. */
|
1999-10-15 01:31:25 +02:00
|
|
|
|
free_EXPR_LIST_list (&mem_set_list);
|
1992-01-15 22:33:30 +01:00
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Update OLD for the registers used or set. */
|
1997-06-05 12:24:03 +02:00
|
|
|
|
AND_COMPL_REG_SET (old, dead);
|
|
|
|
|
IOR_REG_SET (old, live);
|
1992-01-15 22:33:30 +01:00
|
|
|
|
|
|
|
|
|
}
|
|
|
|
|
|
1998-10-17 03:38:15 +02:00
|
|
|
|
/* On final pass, update counts of how many insns each reg is live
|
|
|
|
|
at. */
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
if (flags & PROP_REG_INFO)
|
1998-10-17 03:38:15 +02:00
|
|
|
|
EXECUTE_IF_SET_IN_REG_SET (old, 0, i,
|
|
|
|
|
{ REG_LIVE_LENGTH (i)++; });
|
1992-01-15 22:33:30 +01:00
|
|
|
|
}
|
|
|
|
|
flushed: ;
|
|
|
|
|
if (insn == first)
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
|
1997-07-14 12:49:58 +02:00
|
|
|
|
FREE_REG_SET (dead);
|
|
|
|
|
FREE_REG_SET (live);
|
1999-10-15 01:31:25 +02:00
|
|
|
|
free_EXPR_LIST_list (&mem_set_list);
|
1992-01-15 22:33:30 +01:00
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Return 1 if X (the body of an insn, or part of it) is just dead stores
|
|
|
|
|
(SET expressions whose destinations are registers dead after the insn).
|
|
|
|
|
NEEDED is the regset that says which regs are alive after the insn.
|
|
|
|
|
|
1998-11-17 10:14:33 +01:00
|
|
|
|
Unless CALL_OK is non-zero, an insn is needed if it contains a CALL.
|
|
|
|
|
|
|
|
|
|
If X is the entire body of an insn, NOTES contains the reg notes
|
|
|
|
|
pertaining to the insn. */
|
1992-01-15 22:33:30 +01:00
|
|
|
|
|
|
|
|
|
static int
|
1998-11-17 10:14:33 +01:00
|
|
|
|
insn_dead_p (x, needed, call_ok, notes)
|
1992-01-15 22:33:30 +01:00
|
|
|
|
rtx x;
|
|
|
|
|
regset needed;
|
|
|
|
|
int call_ok;
|
1998-11-17 10:14:33 +01:00
|
|
|
|
rtx notes ATTRIBUTE_UNUSED;
|
1992-01-15 22:33:30 +01:00
|
|
|
|
{
|
1998-04-04 15:32:39 +02:00
|
|
|
|
enum rtx_code code = GET_CODE (x);
|
|
|
|
|
|
1998-11-17 10:14:33 +01:00
|
|
|
|
#ifdef AUTO_INC_DEC
|
|
|
|
|
/* If flow is invoked after reload, we must take existing AUTO_INC
|
|
|
|
|
expresions into account. */
|
|
|
|
|
if (reload_completed)
|
|
|
|
|
{
|
|
|
|
|
for ( ; notes; notes = XEXP (notes, 1))
|
|
|
|
|
{
|
|
|
|
|
if (REG_NOTE_KIND (notes) == REG_INC)
|
|
|
|
|
{
|
|
|
|
|
int regno = REGNO (XEXP (notes, 0));
|
|
|
|
|
|
|
|
|
|
/* Don't delete insns to set global regs. */
|
|
|
|
|
if ((regno < FIRST_PSEUDO_REGISTER && global_regs[regno])
|
|
|
|
|
|| REGNO_REG_SET_P (needed, regno))
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
#endif
|
|
|
|
|
|
1992-01-15 22:33:30 +01:00
|
|
|
|
/* If setting something that's a reg or part of one,
|
|
|
|
|
see if that register's altered value will be live. */
|
|
|
|
|
|
|
|
|
|
if (code == SET)
|
|
|
|
|
{
|
1998-04-04 15:32:39 +02:00
|
|
|
|
rtx r = SET_DEST (x);
|
|
|
|
|
|
1992-01-15 22:33:30 +01:00
|
|
|
|
/* A SET that is a subroutine call cannot be dead. */
|
|
|
|
|
if (! call_ok && GET_CODE (SET_SRC (x)) == CALL)
|
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
|
|
#ifdef HAVE_cc0
|
|
|
|
|
if (GET_CODE (r) == CC0)
|
|
|
|
|
return ! cc0_live;
|
|
|
|
|
#endif
|
|
|
|
|
|
1999-01-18 04:01:26 +01:00
|
|
|
|
if (GET_CODE (r) == MEM && ! MEM_VOLATILE_P (r))
|
|
|
|
|
{
|
|
|
|
|
rtx temp;
|
|
|
|
|
/* Walk the set of memory locations we are currently tracking
|
|
|
|
|
and see if one is an identical match to this memory location.
|
|
|
|
|
If so, this memory write is dead (remember, we're walking
|
|
|
|
|
backwards from the end of the block to the start. */
|
|
|
|
|
temp = mem_set_list;
|
|
|
|
|
while (temp)
|
|
|
|
|
{
|
|
|
|
|
if (rtx_equal_p (XEXP (temp, 0), r))
|
|
|
|
|
return 1;
|
|
|
|
|
temp = XEXP (temp, 1);
|
|
|
|
|
}
|
|
|
|
|
}
|
1992-01-15 22:33:30 +01:00
|
|
|
|
|
1998-04-04 15:32:39 +02:00
|
|
|
|
while (GET_CODE (r) == SUBREG || GET_CODE (r) == STRICT_LOW_PART
|
|
|
|
|
|| GET_CODE (r) == ZERO_EXTRACT)
|
1999-09-08 09:34:47 +02:00
|
|
|
|
r = XEXP (r, 0);
|
1992-01-15 22:33:30 +01:00
|
|
|
|
|
|
|
|
|
if (GET_CODE (r) == REG)
|
|
|
|
|
{
|
1998-04-04 15:32:39 +02:00
|
|
|
|
int regno = REGNO (r);
|
1992-01-15 22:33:30 +01:00
|
|
|
|
|
1992-08-07 06:00:44 +02:00
|
|
|
|
/* Don't delete insns to set global regs. */
|
1992-01-15 22:33:30 +01:00
|
|
|
|
if ((regno < FIRST_PSEUDO_REGISTER && global_regs[regno])
|
|
|
|
|
/* Make sure insns to set frame pointer aren't deleted. */
|
1999-05-31 10:43:04 +02:00
|
|
|
|
|| (regno == FRAME_POINTER_REGNUM
|
|
|
|
|
&& (! reload_completed || frame_pointer_needed))
|
1993-09-24 21:40:36 +02:00
|
|
|
|
#if FRAME_POINTER_REGNUM != HARD_FRAME_POINTER_REGNUM
|
1999-05-31 10:43:04 +02:00
|
|
|
|
|| (regno == HARD_FRAME_POINTER_REGNUM
|
|
|
|
|
&& (! reload_completed || frame_pointer_needed))
|
1993-09-24 21:40:36 +02:00
|
|
|
|
#endif
|
1992-02-11 23:35:04 +01:00
|
|
|
|
#if FRAME_POINTER_REGNUM != ARG_POINTER_REGNUM
|
|
|
|
|
/* Make sure insns to set arg pointer are never deleted
|
|
|
|
|
(if the arg pointer isn't fixed, there will be a USE for
|
1996-07-04 00:07:53 +02:00
|
|
|
|
it, so we can treat it normally). */
|
1992-02-11 23:35:04 +01:00
|
|
|
|
|| (regno == ARG_POINTER_REGNUM && fixed_regs[regno])
|
|
|
|
|
#endif
|
1997-06-05 12:24:03 +02:00
|
|
|
|
|| REGNO_REG_SET_P (needed, regno))
|
1992-01-15 22:33:30 +01:00
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
|
|
/* If this is a hard register, verify that subsequent words are
|
|
|
|
|
not needed. */
|
|
|
|
|
if (regno < FIRST_PSEUDO_REGISTER)
|
|
|
|
|
{
|
|
|
|
|
int n = HARD_REGNO_NREGS (regno, GET_MODE (r));
|
|
|
|
|
|
|
|
|
|
while (--n > 0)
|
1997-06-05 12:24:03 +02:00
|
|
|
|
if (REGNO_REG_SET_P (needed, regno+n))
|
1992-01-15 22:33:30 +01:00
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
return 1;
|
|
|
|
|
}
|
|
|
|
|
}
|
1998-04-04 15:32:39 +02:00
|
|
|
|
|
1992-01-15 22:33:30 +01:00
|
|
|
|
/* If performing several activities,
|
|
|
|
|
insn is dead if each activity is individually dead.
|
|
|
|
|
Also, CLOBBERs and USEs can be ignored; a CLOBBER or USE
|
|
|
|
|
that's inside a PARALLEL doesn't make the insn worth keeping. */
|
|
|
|
|
else if (code == PARALLEL)
|
|
|
|
|
{
|
1998-04-04 15:32:39 +02:00
|
|
|
|
int i = XVECLEN (x, 0);
|
|
|
|
|
|
1992-01-15 22:33:30 +01:00
|
|
|
|
for (i--; i >= 0; i--)
|
1998-04-04 15:32:39 +02:00
|
|
|
|
if (GET_CODE (XVECEXP (x, 0, i)) != CLOBBER
|
|
|
|
|
&& GET_CODE (XVECEXP (x, 0, i)) != USE
|
1998-11-17 10:14:33 +01:00
|
|
|
|
&& ! insn_dead_p (XVECEXP (x, 0, i), needed, call_ok, NULL_RTX))
|
1998-04-04 15:32:39 +02:00
|
|
|
|
return 0;
|
|
|
|
|
|
1992-01-15 22:33:30 +01:00
|
|
|
|
return 1;
|
|
|
|
|
}
|
1998-04-04 15:32:39 +02:00
|
|
|
|
|
|
|
|
|
/* A CLOBBER of a pseudo-register that is dead serves no purpose. That
|
|
|
|
|
is not necessarily true for hard registers. */
|
|
|
|
|
else if (code == CLOBBER && GET_CODE (XEXP (x, 0)) == REG
|
|
|
|
|
&& REGNO (XEXP (x, 0)) >= FIRST_PSEUDO_REGISTER
|
|
|
|
|
&& ! REGNO_REG_SET_P (needed, REGNO (XEXP (x, 0))))
|
|
|
|
|
return 1;
|
|
|
|
|
|
|
|
|
|
/* We do not check other CLOBBER or USE here. An insn consisting of just
|
|
|
|
|
a CLOBBER or just a USE should not be deleted. */
|
1992-01-15 22:33:30 +01:00
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* If X is the pattern of the last insn in a libcall, and assuming X is dead,
|
|
|
|
|
return 1 if the entire library call is dead.
|
|
|
|
|
This is true if X copies a register (hard or pseudo)
|
|
|
|
|
and if the hard return reg of the call insn is dead.
|
|
|
|
|
(The caller should have tested the destination of X already for death.)
|
|
|
|
|
|
|
|
|
|
If this insn doesn't just copy a register, then we don't
|
|
|
|
|
have an ordinary libcall. In that case, cse could not have
|
|
|
|
|
managed to substitute the source for the dest later on,
|
|
|
|
|
so we can assume the libcall is dead.
|
|
|
|
|
|
|
|
|
|
NEEDED is the bit vector of pseudoregs live before this insn.
|
|
|
|
|
NOTE is the REG_RETVAL note of the insn. INSN is the insn itself. */
|
|
|
|
|
|
|
|
|
|
static int
|
|
|
|
|
libcall_dead_p (x, needed, note, insn)
|
|
|
|
|
rtx x;
|
|
|
|
|
regset needed;
|
|
|
|
|
rtx note;
|
|
|
|
|
rtx insn;
|
|
|
|
|
{
|
|
|
|
|
register RTX_CODE code = GET_CODE (x);
|
|
|
|
|
|
|
|
|
|
if (code == SET)
|
|
|
|
|
{
|
|
|
|
|
register rtx r = SET_SRC (x);
|
|
|
|
|
if (GET_CODE (r) == REG)
|
|
|
|
|
{
|
|
|
|
|
rtx call = XEXP (note, 0);
|
1998-11-17 10:14:33 +01:00
|
|
|
|
rtx call_pat;
|
1992-01-15 22:33:30 +01:00
|
|
|
|
register int i;
|
|
|
|
|
|
|
|
|
|
/* Find the call insn. */
|
|
|
|
|
while (call != insn && GET_CODE (call) != CALL_INSN)
|
|
|
|
|
call = NEXT_INSN (call);
|
|
|
|
|
|
|
|
|
|
/* If there is none, do nothing special,
|
|
|
|
|
since ordinary death handling can understand these insns. */
|
|
|
|
|
if (call == insn)
|
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
|
|
/* See if the hard reg holding the value is dead.
|
|
|
|
|
If this is a PARALLEL, find the call within it. */
|
1998-11-17 10:14:33 +01:00
|
|
|
|
call_pat = PATTERN (call);
|
|
|
|
|
if (GET_CODE (call_pat) == PARALLEL)
|
1992-01-15 22:33:30 +01:00
|
|
|
|
{
|
1998-11-17 10:14:33 +01:00
|
|
|
|
for (i = XVECLEN (call_pat, 0) - 1; i >= 0; i--)
|
|
|
|
|
if (GET_CODE (XVECEXP (call_pat, 0, i)) == SET
|
|
|
|
|
&& GET_CODE (SET_SRC (XVECEXP (call_pat, 0, i))) == CALL)
|
1992-01-15 22:33:30 +01:00
|
|
|
|
break;
|
|
|
|
|
|
1994-03-11 20:50:38 +01:00
|
|
|
|
/* This may be a library call that is returning a value
|
|
|
|
|
via invisible pointer. Do nothing special, since
|
|
|
|
|
ordinary death handling can understand these insns. */
|
1992-01-15 22:33:30 +01:00
|
|
|
|
if (i < 0)
|
1994-03-11 20:50:38 +01:00
|
|
|
|
return 0;
|
1992-01-15 22:33:30 +01:00
|
|
|
|
|
1998-11-17 10:14:33 +01:00
|
|
|
|
call_pat = XVECEXP (call_pat, 0, i);
|
1992-01-15 22:33:30 +01:00
|
|
|
|
}
|
|
|
|
|
|
1998-11-17 10:14:33 +01:00
|
|
|
|
return insn_dead_p (call_pat, needed, 1, REG_NOTES (call));
|
1992-01-15 22:33:30 +01:00
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
return 1;
|
|
|
|
|
}
|
|
|
|
|
|
1998-07-21 10:54:29 +02:00
|
|
|
|
/* Return 1 if register REGNO was used before it was set, i.e. if it is
|
|
|
|
|
live at function entry. Don't count global register variables, variables
|
|
|
|
|
in registers that can be used for function arg passing, or variables in
|
|
|
|
|
fixed hard registers. */
|
1992-01-15 22:33:30 +01:00
|
|
|
|
|
|
|
|
|
int
|
|
|
|
|
regno_uninitialized (regno)
|
|
|
|
|
int regno;
|
|
|
|
|
{
|
1993-02-19 20:09:39 +01:00
|
|
|
|
if (n_basic_blocks == 0
|
1997-01-29 22:00:25 +01:00
|
|
|
|
|| (regno < FIRST_PSEUDO_REGISTER
|
1998-07-21 10:54:29 +02:00
|
|
|
|
&& (global_regs[regno]
|
|
|
|
|
|| fixed_regs[regno]
|
|
|
|
|
|| FUNCTION_ARG_REGNO_P (regno))))
|
1992-01-15 22:33:30 +01:00
|
|
|
|
return 0;
|
|
|
|
|
|
1999-02-26 00:45:42 +01:00
|
|
|
|
return REGNO_REG_SET_P (BASIC_BLOCK (0)->global_live_at_start, regno);
|
1992-01-15 22:33:30 +01:00
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* 1 if register REGNO was alive at a place where `setjmp' was called
|
|
|
|
|
and was set more than once or is an argument.
|
|
|
|
|
Such regs may be clobbered by `longjmp'. */
|
|
|
|
|
|
|
|
|
|
int
|
|
|
|
|
regno_clobbered_at_setjmp (regno)
|
|
|
|
|
int regno;
|
|
|
|
|
{
|
|
|
|
|
if (n_basic_blocks == 0)
|
|
|
|
|
return 0;
|
|
|
|
|
|
1997-05-30 20:19:19 +02:00
|
|
|
|
return ((REG_N_SETS (regno) > 1
|
1999-02-26 00:45:42 +01:00
|
|
|
|
|| REGNO_REG_SET_P (BASIC_BLOCK (0)->global_live_at_start, regno))
|
1997-06-05 12:24:03 +02:00
|
|
|
|
&& REGNO_REG_SET_P (regs_live_at_setjmp, regno));
|
1992-01-15 22:33:30 +01:00
|
|
|
|
}
|
|
|
|
|
|
1999-01-20 03:02:20 +01:00
|
|
|
|
/* INSN references memory, possibly using autoincrement addressing modes.
|
|
|
|
|
Find any entries on the mem_set_list that need to be invalidated due
|
|
|
|
|
to an address change. */
|
|
|
|
|
static void
|
|
|
|
|
invalidate_mems_from_autoinc (insn)
|
|
|
|
|
rtx insn;
|
|
|
|
|
{
|
|
|
|
|
rtx note = REG_NOTES (insn);
|
|
|
|
|
for (note = REG_NOTES (insn); note; note = XEXP (note, 1))
|
|
|
|
|
{
|
|
|
|
|
if (REG_NOTE_KIND (note) == REG_INC)
|
|
|
|
|
{
|
|
|
|
|
rtx temp = mem_set_list;
|
|
|
|
|
rtx prev = NULL_RTX;
|
1999-10-15 01:31:25 +02:00
|
|
|
|
rtx next;
|
1999-01-20 03:02:20 +01:00
|
|
|
|
|
|
|
|
|
while (temp)
|
|
|
|
|
{
|
1999-10-15 01:31:25 +02:00
|
|
|
|
next = XEXP (temp, 1);
|
1999-01-20 03:02:20 +01:00
|
|
|
|
if (reg_overlap_mentioned_p (XEXP (note, 0), XEXP (temp, 0)))
|
|
|
|
|
{
|
|
|
|
|
/* Splice temp out of list. */
|
|
|
|
|
if (prev)
|
1999-10-15 01:31:25 +02:00
|
|
|
|
XEXP (prev, 1) = next;
|
1999-01-20 03:02:20 +01:00
|
|
|
|
else
|
1999-10-15 01:31:25 +02:00
|
|
|
|
mem_set_list = next;
|
|
|
|
|
free_EXPR_LIST_node (temp);
|
1999-01-20 03:02:20 +01:00
|
|
|
|
}
|
|
|
|
|
else
|
|
|
|
|
prev = temp;
|
1999-10-15 01:31:25 +02:00
|
|
|
|
temp = next;
|
1999-01-20 03:02:20 +01:00
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
/* Process the registers that are set within X. Their bits are set to
|
|
|
|
|
1 in the regset DEAD, because they are dead prior to this insn.
|
1992-01-15 22:33:30 +01:00
|
|
|
|
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
If INSN is nonzero, it is the insn being processed.
|
|
|
|
|
|
|
|
|
|
FLAGS is the set of operations to perform. */
|
1992-01-15 22:33:30 +01:00
|
|
|
|
|
|
|
|
|
static void
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
mark_set_regs (needed, dead, x, insn, significant, flags)
|
1992-01-15 22:33:30 +01:00
|
|
|
|
regset needed;
|
|
|
|
|
regset dead;
|
|
|
|
|
rtx x;
|
|
|
|
|
rtx insn;
|
|
|
|
|
regset significant;
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
int flags;
|
1992-01-15 22:33:30 +01:00
|
|
|
|
{
|
|
|
|
|
register RTX_CODE code = GET_CODE (x);
|
|
|
|
|
|
|
|
|
|
if (code == SET || code == CLOBBER)
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
mark_set_1 (needed, dead, x, insn, significant, flags);
|
1992-01-15 22:33:30 +01:00
|
|
|
|
else if (code == PARALLEL)
|
|
|
|
|
{
|
|
|
|
|
register int i;
|
|
|
|
|
for (i = XVECLEN (x, 0) - 1; i >= 0; i--)
|
|
|
|
|
{
|
|
|
|
|
code = GET_CODE (XVECEXP (x, 0, i));
|
|
|
|
|
if (code == SET || code == CLOBBER)
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
mark_set_1 (needed, dead, XVECEXP (x, 0, i), insn,
|
|
|
|
|
significant, flags);
|
1992-01-15 22:33:30 +01:00
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Process a single SET rtx, X. */
|
|
|
|
|
|
|
|
|
|
static void
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
mark_set_1 (needed, dead, x, insn, significant, flags)
|
1992-01-15 22:33:30 +01:00
|
|
|
|
regset needed;
|
|
|
|
|
regset dead;
|
|
|
|
|
rtx x;
|
|
|
|
|
rtx insn;
|
|
|
|
|
regset significant;
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
int flags;
|
1992-01-15 22:33:30 +01:00
|
|
|
|
{
|
collect2.c (scan_prog_file, [...]): Prototype function pointers and casts for `int_handler' and `quit_handler'.
* collect2.c (scan_prog_file, scan_libraries): Prototype function
pointers and casts for `int_handler' and `quit_handler'.
* flow.c (verify_flow_info, split_hard_reg_notes,
find_insn_with_note, sets_reg_or_subreg_1, prepend_reg_notes,
remove_edge, remove_fake_successors): Add static prototypes.
(verify_flow_info): Wrap with macro ENABLE_CHECKING.
(mark_set_1): Initialize variable `regno'.
(unlink_insn_chain): Likewise for variable `curr'.
(remove_fake_edges): Remove unused variables `e', `tmp' and `last'.
* loop.c (strength_reduce): Initialize variable
`unrolled_insn_copies'.
(cmp_combine_givs_stats, cmp_recombine_givs_stats): Add static
prototypes. Change these functions to take const PTR parameters
to avoid prototype conflict when used as the comparson argument
for qsort.
(check_dbra_loop): Initialize variable `comparison_val'.
* reload.c (debug_reload_to_stream, debug_reload): Add prototypes.
(get_secondary_mem): Mark parameter `x' with ATTRIBUTE_UNUSED.
(find_valid_class): Initialize variable `best_class'.
(find_reloads): Call memcpy, not bcopy.
* reload1.c (gen_mode_int, dump_needs): Add prototypes.
(hard_reg_use_compare): Don't needlessly cast away const.
(reload_reg_class_lower): Likewise.
(choose_reload_regs): Initialize variable `regno'.
From-SVN: r29840
1999-10-06 16:48:41 +02:00
|
|
|
|
register int regno = -1;
|
1992-01-15 22:33:30 +01:00
|
|
|
|
register rtx reg = SET_DEST (x);
|
|
|
|
|
|
1998-09-12 03:03:36 +02:00
|
|
|
|
/* Some targets place small structures in registers for
|
|
|
|
|
return values of functions. We have to detect this
|
|
|
|
|
case specially here to get correct flow information. */
|
|
|
|
|
if (GET_CODE (reg) == PARALLEL
|
|
|
|
|
&& GET_MODE (reg) == BLKmode)
|
|
|
|
|
{
|
|
|
|
|
register int i;
|
|
|
|
|
|
|
|
|
|
for (i = XVECLEN (reg, 0) - 1; i >= 0; i--)
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
mark_set_1 (needed, dead, XVECEXP (reg, 0, i), insn,
|
|
|
|
|
significant, flags);
|
1998-09-12 03:03:36 +02:00
|
|
|
|
return;
|
|
|
|
|
}
|
|
|
|
|
|
1992-01-15 22:33:30 +01:00
|
|
|
|
/* Modifying just one hardware register of a multi-reg value
|
|
|
|
|
or just a byte field of a register
|
|
|
|
|
does not mean the value from before this insn is now dead.
|
|
|
|
|
But it does mean liveness of that register at the end of the block
|
|
|
|
|
is significant.
|
|
|
|
|
|
|
|
|
|
Within mark_set_1, however, we treat it as if the register is
|
|
|
|
|
indeed modified. mark_used_regs will, however, also treat this
|
|
|
|
|
register as being used. Thus, we treat these insns as setting a
|
|
|
|
|
new value for the register as a function of its old value. This
|
|
|
|
|
cases LOG_LINKS to be made appropriately and this will help combine. */
|
|
|
|
|
|
|
|
|
|
while (GET_CODE (reg) == SUBREG || GET_CODE (reg) == ZERO_EXTRACT
|
|
|
|
|
|| GET_CODE (reg) == SIGN_EXTRACT
|
|
|
|
|
|| GET_CODE (reg) == STRICT_LOW_PART)
|
|
|
|
|
reg = XEXP (reg, 0);
|
|
|
|
|
|
1999-01-18 04:01:26 +01:00
|
|
|
|
/* If this set is a MEM, then it kills any aliased writes.
|
|
|
|
|
If this set is a REG, then it kills any MEMs which use the reg. */
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
if (flags & PROP_SCAN_DEAD_CODE)
|
1999-01-18 04:01:26 +01:00
|
|
|
|
{
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
if (GET_CODE (reg) == MEM
|
|
|
|
|
|| GET_CODE (reg) == REG)
|
1999-01-18 04:01:26 +01:00
|
|
|
|
{
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
rtx temp = mem_set_list;
|
|
|
|
|
rtx prev = NULL_RTX;
|
1999-10-15 01:31:25 +02:00
|
|
|
|
rtx next;
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
|
|
|
|
|
while (temp)
|
1999-01-18 04:01:26 +01:00
|
|
|
|
{
|
1999-10-15 01:31:25 +02:00
|
|
|
|
next = XEXP (temp, 1);
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
if ((GET_CODE (reg) == MEM
|
|
|
|
|
&& output_dependence (XEXP (temp, 0), reg))
|
|
|
|
|
|| (GET_CODE (reg) == REG
|
|
|
|
|
&& reg_overlap_mentioned_p (reg, XEXP (temp, 0))))
|
|
|
|
|
{
|
|
|
|
|
/* Splice this entry out of the list. */
|
|
|
|
|
if (prev)
|
1999-10-15 01:31:25 +02:00
|
|
|
|
XEXP (prev, 1) = next;
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
else
|
1999-10-15 01:31:25 +02:00
|
|
|
|
mem_set_list = next;
|
|
|
|
|
free_EXPR_LIST_node (temp);
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
}
|
1999-01-18 04:01:26 +01:00
|
|
|
|
else
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
prev = temp;
|
1999-10-15 01:31:25 +02:00
|
|
|
|
temp = next;
|
1999-01-18 04:01:26 +01:00
|
|
|
|
}
|
|
|
|
|
}
|
1999-01-20 03:02:20 +01:00
|
|
|
|
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
/* If the memory reference had embedded side effects (autoincrement
|
|
|
|
|
address modes. Then we may need to kill some entries on the
|
|
|
|
|
memory set list. */
|
|
|
|
|
if (insn && GET_CODE (reg) == MEM)
|
|
|
|
|
invalidate_mems_from_autoinc (insn);
|
|
|
|
|
|
|
|
|
|
if (GET_CODE (reg) == MEM && ! side_effects_p (reg)
|
|
|
|
|
/* We do not know the size of a BLKmode store, so we do not track
|
|
|
|
|
them for redundant store elimination. */
|
|
|
|
|
&& GET_MODE (reg) != BLKmode
|
|
|
|
|
/* There are no REG_INC notes for SP, so we can't assume we'll see
|
|
|
|
|
everything that invalidates it. To be safe, don't eliminate any
|
|
|
|
|
stores though SP; none of them should be redundant anyway. */
|
|
|
|
|
&& ! reg_mentioned_p (stack_pointer_rtx, reg))
|
|
|
|
|
mem_set_list = alloc_EXPR_LIST (0, reg, mem_set_list);
|
|
|
|
|
}
|
1992-01-15 22:33:30 +01:00
|
|
|
|
|
|
|
|
|
if (GET_CODE (reg) == REG
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
&& (regno = REGNO (reg),
|
|
|
|
|
! (regno == FRAME_POINTER_REGNUM
|
|
|
|
|
&& (! reload_completed || frame_pointer_needed)))
|
1993-09-24 21:40:36 +02:00
|
|
|
|
#if FRAME_POINTER_REGNUM != HARD_FRAME_POINTER_REGNUM
|
1999-05-31 10:43:04 +02:00
|
|
|
|
&& ! (regno == HARD_FRAME_POINTER_REGNUM
|
|
|
|
|
&& (! reload_completed || frame_pointer_needed))
|
1993-09-24 21:40:36 +02:00
|
|
|
|
#endif
|
1992-02-11 23:35:04 +01:00
|
|
|
|
#if FRAME_POINTER_REGNUM != ARG_POINTER_REGNUM
|
|
|
|
|
&& ! (regno == ARG_POINTER_REGNUM && fixed_regs[regno])
|
|
|
|
|
#endif
|
1992-01-15 22:33:30 +01:00
|
|
|
|
&& ! (regno < FIRST_PSEUDO_REGISTER && global_regs[regno]))
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
/* && regno != STACK_POINTER_REGNUM) -- let's try without this. */
|
1992-01-15 22:33:30 +01:00
|
|
|
|
{
|
1997-06-05 12:24:03 +02:00
|
|
|
|
int some_needed = REGNO_REG_SET_P (needed, regno);
|
|
|
|
|
int some_not_needed = ! some_needed;
|
1992-01-15 22:33:30 +01:00
|
|
|
|
|
|
|
|
|
/* Mark it as a significant register for this basic block. */
|
|
|
|
|
if (significant)
|
1997-06-05 12:24:03 +02:00
|
|
|
|
SET_REGNO_REG_SET (significant, regno);
|
1992-01-15 22:33:30 +01:00
|
|
|
|
|
1998-05-06 23:09:07 +02:00
|
|
|
|
/* Mark it as dead before this insn. */
|
1997-06-05 12:24:03 +02:00
|
|
|
|
SET_REGNO_REG_SET (dead, regno);
|
1992-01-15 22:33:30 +01:00
|
|
|
|
|
|
|
|
|
/* A hard reg in a wide mode may really be multiple registers.
|
|
|
|
|
If so, mark all of them just like the first. */
|
|
|
|
|
if (regno < FIRST_PSEUDO_REGISTER)
|
|
|
|
|
{
|
|
|
|
|
int n;
|
|
|
|
|
|
|
|
|
|
/* Nothing below is needed for the stack pointer; get out asap.
|
|
|
|
|
Eg, log links aren't needed, since combine won't use them. */
|
|
|
|
|
if (regno == STACK_POINTER_REGNUM)
|
|
|
|
|
return;
|
|
|
|
|
|
|
|
|
|
n = HARD_REGNO_NREGS (regno, GET_MODE (reg));
|
|
|
|
|
while (--n > 0)
|
|
|
|
|
{
|
1997-06-05 12:24:03 +02:00
|
|
|
|
int regno_n = regno + n;
|
|
|
|
|
int needed_regno = REGNO_REG_SET_P (needed, regno_n);
|
1992-01-15 22:33:30 +01:00
|
|
|
|
if (significant)
|
1997-06-05 12:24:03 +02:00
|
|
|
|
SET_REGNO_REG_SET (significant, regno_n);
|
1996-05-11 00:33:30 +02:00
|
|
|
|
|
1997-06-05 12:24:03 +02:00
|
|
|
|
SET_REGNO_REG_SET (dead, regno_n);
|
|
|
|
|
some_needed |= needed_regno;
|
|
|
|
|
some_not_needed |= ! needed_regno;
|
1992-01-15 22:33:30 +01:00
|
|
|
|
}
|
|
|
|
|
}
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
|
1992-01-15 22:33:30 +01:00
|
|
|
|
/* Additional data to record if this is the final pass. */
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
if (flags & (PROP_LOG_LINKS | PROP_REG_INFO
|
|
|
|
|
| PROP_DEATH_NOTES | PROP_AUTOINC))
|
1992-01-15 22:33:30 +01:00
|
|
|
|
{
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
register rtx y;
|
1992-01-15 22:33:30 +01:00
|
|
|
|
register int blocknum = BLOCK_NUM (insn);
|
|
|
|
|
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
y = NULL_RTX;
|
|
|
|
|
if (flags & (PROP_LOG_LINKS | PROP_AUTOINC))
|
|
|
|
|
y = reg_next_use[regno];
|
|
|
|
|
|
1992-01-15 22:33:30 +01:00
|
|
|
|
/* If this is a hard reg, record this function uses the reg. */
|
|
|
|
|
|
|
|
|
|
if (regno < FIRST_PSEUDO_REGISTER)
|
|
|
|
|
{
|
|
|
|
|
register int i;
|
|
|
|
|
int endregno = regno + HARD_REGNO_NREGS (regno, GET_MODE (reg));
|
|
|
|
|
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
if (flags & (PROP_LOG_LINKS | PROP_AUTOINC))
|
|
|
|
|
for (i = regno; i < endregno; i++)
|
|
|
|
|
{
|
|
|
|
|
/* The next use is no longer "next", since a store
|
|
|
|
|
intervenes. */
|
|
|
|
|
reg_next_use[i] = 0;
|
|
|
|
|
}
|
1994-12-20 02:53:11 +01:00
|
|
|
|
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
if (flags & PROP_REG_INFO)
|
|
|
|
|
for (i = regno; i < endregno; i++)
|
|
|
|
|
{
|
|
|
|
|
regs_ever_live[i] = 1;
|
|
|
|
|
REG_N_SETS (i)++;
|
|
|
|
|
}
|
1992-01-15 22:33:30 +01:00
|
|
|
|
}
|
|
|
|
|
else
|
|
|
|
|
{
|
1994-12-20 02:53:11 +01:00
|
|
|
|
/* The next use is no longer "next", since a store
|
|
|
|
|
intervenes. */
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
if (flags & (PROP_LOG_LINKS | PROP_AUTOINC))
|
|
|
|
|
reg_next_use[regno] = 0;
|
1994-12-20 02:53:11 +01:00
|
|
|
|
|
1992-01-15 22:33:30 +01:00
|
|
|
|
/* Keep track of which basic blocks each reg appears in. */
|
|
|
|
|
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
if (flags & PROP_REG_INFO)
|
|
|
|
|
{
|
|
|
|
|
if (REG_BASIC_BLOCK (regno) == REG_BLOCK_UNKNOWN)
|
|
|
|
|
REG_BASIC_BLOCK (regno) = blocknum;
|
|
|
|
|
else if (REG_BASIC_BLOCK (regno) != blocknum)
|
|
|
|
|
REG_BASIC_BLOCK (regno) = REG_BLOCK_GLOBAL;
|
|
|
|
|
|
|
|
|
|
/* Count (weighted) references, stores, etc. This counts a
|
|
|
|
|
register twice if it is modified, but that is correct. */
|
|
|
|
|
REG_N_SETS (regno)++;
|
|
|
|
|
REG_N_REFS (regno) += loop_depth;
|
1992-01-15 22:33:30 +01:00
|
|
|
|
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
/* The insns where a reg is live are normally counted
|
|
|
|
|
elsewhere, but we want the count to include the insn
|
|
|
|
|
where the reg is set, and the normal counting mechanism
|
|
|
|
|
would not count it. */
|
|
|
|
|
REG_LIVE_LENGTH (regno)++;
|
|
|
|
|
}
|
1992-01-15 22:33:30 +01:00
|
|
|
|
}
|
|
|
|
|
|
1996-05-11 00:33:30 +02:00
|
|
|
|
if (! some_not_needed)
|
1992-01-15 22:33:30 +01:00
|
|
|
|
{
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
if (flags & PROP_LOG_LINKS)
|
|
|
|
|
{
|
|
|
|
|
/* Make a logical link from the next following insn
|
|
|
|
|
that uses this register, back to this insn.
|
|
|
|
|
The following insns have already been processed.
|
|
|
|
|
|
|
|
|
|
We don't build a LOG_LINK for hard registers containing
|
|
|
|
|
in ASM_OPERANDs. If these registers get replaced,
|
|
|
|
|
we might wind up changing the semantics of the insn,
|
|
|
|
|
even if reload can make what appear to be valid
|
|
|
|
|
assignments later. */
|
|
|
|
|
if (y && (BLOCK_NUM (y) == blocknum)
|
|
|
|
|
&& (regno >= FIRST_PSEUDO_REGISTER
|
|
|
|
|
|| asm_noperands (PATTERN (y)) < 0))
|
|
|
|
|
LOG_LINKS (y) = alloc_INSN_LIST (insn, LOG_LINKS (y));
|
|
|
|
|
}
|
1992-01-15 22:33:30 +01:00
|
|
|
|
}
|
|
|
|
|
else if (! some_needed)
|
|
|
|
|
{
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
if (flags & PROP_REG_INFO)
|
|
|
|
|
REG_N_DEATHS (REGNO (reg))++;
|
|
|
|
|
|
|
|
|
|
if (flags & PROP_DEATH_NOTES)
|
|
|
|
|
{
|
|
|
|
|
/* Note that dead stores have already been deleted
|
|
|
|
|
when possible. If we get here, we have found a
|
|
|
|
|
dead store that cannot be eliminated (because the
|
|
|
|
|
same insn does something useful). Indicate this
|
|
|
|
|
by marking the reg being set as dying here. */
|
|
|
|
|
REG_NOTES (insn)
|
|
|
|
|
= alloc_EXPR_LIST (REG_UNUSED, reg, REG_NOTES (insn));
|
|
|
|
|
}
|
1992-01-15 22:33:30 +01:00
|
|
|
|
}
|
|
|
|
|
else
|
|
|
|
|
{
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
if (flags & PROP_DEATH_NOTES)
|
|
|
|
|
{
|
|
|
|
|
/* This is a case where we have a multi-word hard register
|
|
|
|
|
and some, but not all, of the words of the register are
|
|
|
|
|
needed in subsequent insns. Write REG_UNUSED notes
|
|
|
|
|
for those parts that were not needed. This case should
|
|
|
|
|
be rare. */
|
|
|
|
|
|
|
|
|
|
int i;
|
|
|
|
|
|
|
|
|
|
for (i = HARD_REGNO_NREGS (regno, GET_MODE (reg)) - 1;
|
|
|
|
|
i >= 0; i--)
|
|
|
|
|
if (!REGNO_REG_SET_P (needed, regno + i))
|
|
|
|
|
REG_NOTES (insn)
|
|
|
|
|
= (alloc_EXPR_LIST
|
|
|
|
|
(REG_UNUSED,
|
|
|
|
|
gen_rtx_REG (reg_raw_mode[regno + i], regno + i),
|
|
|
|
|
REG_NOTES (insn)));
|
|
|
|
|
}
|
1992-01-15 22:33:30 +01:00
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
}
|
1993-04-08 00:13:16 +02:00
|
|
|
|
else if (GET_CODE (reg) == REG)
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
{
|
|
|
|
|
if (flags & (PROP_LOG_LINKS | PROP_AUTOINC))
|
|
|
|
|
reg_next_use[regno] = 0;
|
|
|
|
|
}
|
1992-01-15 22:33:30 +01:00
|
|
|
|
|
|
|
|
|
/* If this is the last pass and this is a SCRATCH, show it will be dying
|
|
|
|
|
here and count it. */
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
else if (GET_CODE (reg) == SCRATCH)
|
1992-01-15 22:33:30 +01:00
|
|
|
|
{
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
if (flags & PROP_DEATH_NOTES)
|
|
|
|
|
REG_NOTES (insn)
|
|
|
|
|
= alloc_EXPR_LIST (REG_UNUSED, reg, REG_NOTES (insn));
|
1992-01-15 22:33:30 +01:00
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
#ifdef AUTO_INC_DEC
|
|
|
|
|
|
|
|
|
|
/* X is a MEM found in INSN. See if we can convert it into an auto-increment
|
|
|
|
|
reference. */
|
|
|
|
|
|
|
|
|
|
static void
|
|
|
|
|
find_auto_inc (needed, x, insn)
|
|
|
|
|
regset needed;
|
|
|
|
|
rtx x;
|
|
|
|
|
rtx insn;
|
|
|
|
|
{
|
|
|
|
|
rtx addr = XEXP (x, 0);
|
1994-02-03 21:27:23 +01:00
|
|
|
|
HOST_WIDE_INT offset = 0;
|
1994-01-29 01:19:59 +01:00
|
|
|
|
rtx set;
|
1992-01-15 22:33:30 +01:00
|
|
|
|
|
|
|
|
|
/* Here we detect use of an index register which might be good for
|
|
|
|
|
postincrement, postdecrement, preincrement, or predecrement. */
|
|
|
|
|
|
|
|
|
|
if (GET_CODE (addr) == PLUS && GET_CODE (XEXP (addr, 1)) == CONST_INT)
|
|
|
|
|
offset = INTVAL (XEXP (addr, 1)), addr = XEXP (addr, 0);
|
|
|
|
|
|
|
|
|
|
if (GET_CODE (addr) == REG)
|
|
|
|
|
{
|
|
|
|
|
register rtx y;
|
|
|
|
|
register int size = GET_MODE_SIZE (GET_MODE (x));
|
|
|
|
|
rtx use;
|
|
|
|
|
rtx incr;
|
|
|
|
|
int regno = REGNO (addr);
|
|
|
|
|
|
|
|
|
|
/* Is the next use an increment that might make auto-increment? */
|
1994-01-29 01:19:59 +01:00
|
|
|
|
if ((incr = reg_next_use[regno]) != 0
|
|
|
|
|
&& (set = single_set (incr)) != 0
|
|
|
|
|
&& GET_CODE (set) == SET
|
1992-01-15 22:33:30 +01:00
|
|
|
|
&& BLOCK_NUM (incr) == BLOCK_NUM (insn)
|
|
|
|
|
/* Can't add side effects to jumps; if reg is spilled and
|
|
|
|
|
reloaded, there's no way to store back the altered value. */
|
|
|
|
|
&& GET_CODE (insn) != JUMP_INSN
|
1994-01-29 01:19:59 +01:00
|
|
|
|
&& (y = SET_SRC (set), GET_CODE (y) == PLUS)
|
1992-01-15 22:33:30 +01:00
|
|
|
|
&& XEXP (y, 0) == addr
|
|
|
|
|
&& GET_CODE (XEXP (y, 1)) == CONST_INT
|
1998-11-25 00:15:19 +01:00
|
|
|
|
&& ((HAVE_POST_INCREMENT
|
|
|
|
|
&& (INTVAL (XEXP (y, 1)) == size && offset == 0))
|
|
|
|
|
|| (HAVE_POST_DECREMENT
|
|
|
|
|
&& (INTVAL (XEXP (y, 1)) == - size && offset == 0))
|
|
|
|
|
|| (HAVE_PRE_INCREMENT
|
|
|
|
|
&& (INTVAL (XEXP (y, 1)) == size && offset == size))
|
|
|
|
|
|| (HAVE_PRE_DECREMENT
|
|
|
|
|
&& (INTVAL (XEXP (y, 1)) == - size && offset == - size)))
|
1992-01-15 22:33:30 +01:00
|
|
|
|
/* Make sure this reg appears only once in this insn. */
|
|
|
|
|
&& (use = find_use_as_address (PATTERN (insn), addr, offset),
|
|
|
|
|
use != 0 && use != (rtx) 1))
|
|
|
|
|
{
|
1994-01-29 01:19:59 +01:00
|
|
|
|
rtx q = SET_DEST (set);
|
1994-08-11 19:13:20 +02:00
|
|
|
|
enum rtx_code inc_code = (INTVAL (XEXP (y, 1)) == size
|
|
|
|
|
? (offset ? PRE_INC : POST_INC)
|
|
|
|
|
: (offset ? PRE_DEC : POST_DEC));
|
1992-01-15 22:33:30 +01:00
|
|
|
|
|
|
|
|
|
if (dead_or_set_p (incr, addr))
|
1994-08-11 19:13:20 +02:00
|
|
|
|
{
|
|
|
|
|
/* This is the simple case. Try to make the auto-inc. If
|
|
|
|
|
we can't, we are done. Otherwise, we will do any
|
|
|
|
|
needed updates below. */
|
|
|
|
|
if (! validate_change (insn, &XEXP (x, 0),
|
alias.c: Change all uses of gen_rtx(FOO...) to gen_rtx_FOO...
* alias.c: Change all uses of gen_rtx(FOO...) to gen_rtx_FOO;
change gen_rtx(expr...) to gen_rtx_fmt_foo(expr...).
* caller-save.c, calls.c, combine.c, cse.c: Likewise.
* dwarf2out.c, except.c, explow.c, expmed.c, expr.c: Likewise.
* final.c, flow.c, function.c, genpeep.c, haifa-sched.c: Likewise.
* halfpic.c, integrate.c, jump.c, local-alloc.c, loop.c: Likewise.
* profile.c, recog.c, reg-stack.c, regclass.c, regmove.c: Likewise.
* reload.c, reload1.c, reorg.c, sched.c, stmt.c, stupid.c: Likewise.
* unroll.c, varasm.c: Likewise.
* config/alpha/alpha.c, config/alpha/alpha.md: Likewise.
From-SVN: r17357
1998-01-15 00:10:50 +01:00
|
|
|
|
gen_rtx_fmt_e (inc_code, Pmode, addr),
|
1994-08-11 19:13:20 +02:00
|
|
|
|
0))
|
|
|
|
|
return;
|
|
|
|
|
}
|
1993-07-02 04:51:57 +02:00
|
|
|
|
else if (GET_CODE (q) == REG
|
|
|
|
|
/* PREV_INSN used here to check the semi-open interval
|
|
|
|
|
[insn,incr). */
|
1996-04-08 22:31:32 +02:00
|
|
|
|
&& ! reg_used_between_p (q, PREV_INSN (insn), incr)
|
|
|
|
|
/* We must also check for sets of q as q may be
|
|
|
|
|
a call clobbered hard register and there may
|
|
|
|
|
be a call between PREV_INSN (insn) and incr. */
|
|
|
|
|
&& ! reg_set_between_p (q, PREV_INSN (insn), incr))
|
1992-01-15 22:33:30 +01:00
|
|
|
|
{
|
1993-07-02 04:51:57 +02:00
|
|
|
|
/* We have *p followed sometime later by q = p+size.
|
1992-01-15 22:33:30 +01:00
|
|
|
|
Both p and q must be live afterward,
|
1998-06-29 23:40:49 +02:00
|
|
|
|
and q is not used between INSN and its assignment.
|
1992-01-15 22:33:30 +01:00
|
|
|
|
Change it to q = p, ...*q..., q = q+size.
|
|
|
|
|
Then fall into the usual case. */
|
|
|
|
|
rtx insns, temp;
|
1999-02-26 00:45:42 +01:00
|
|
|
|
basic_block bb;
|
1992-01-15 22:33:30 +01:00
|
|
|
|
|
|
|
|
|
start_sequence ();
|
|
|
|
|
emit_move_insn (q, addr);
|
|
|
|
|
insns = get_insns ();
|
|
|
|
|
end_sequence ();
|
|
|
|
|
|
1999-02-26 00:45:42 +01:00
|
|
|
|
bb = BLOCK_FOR_INSN (insn);
|
1992-01-15 22:33:30 +01:00
|
|
|
|
for (temp = insns; temp; temp = NEXT_INSN (temp))
|
1999-02-26 00:45:42 +01:00
|
|
|
|
set_block_for_insn (temp, bb);
|
1992-01-15 22:33:30 +01:00
|
|
|
|
|
1994-08-11 19:13:20 +02:00
|
|
|
|
/* If we can't make the auto-inc, or can't make the
|
|
|
|
|
replacement into Y, exit. There's no point in making
|
|
|
|
|
the change below if we can't do the auto-inc and doing
|
|
|
|
|
so is not correct in the pre-inc case. */
|
|
|
|
|
|
|
|
|
|
validate_change (insn, &XEXP (x, 0),
|
alias.c: Change all uses of gen_rtx(FOO...) to gen_rtx_FOO...
* alias.c: Change all uses of gen_rtx(FOO...) to gen_rtx_FOO;
change gen_rtx(expr...) to gen_rtx_fmt_foo(expr...).
* caller-save.c, calls.c, combine.c, cse.c: Likewise.
* dwarf2out.c, except.c, explow.c, expmed.c, expr.c: Likewise.
* final.c, flow.c, function.c, genpeep.c, haifa-sched.c: Likewise.
* halfpic.c, integrate.c, jump.c, local-alloc.c, loop.c: Likewise.
* profile.c, recog.c, reg-stack.c, regclass.c, regmove.c: Likewise.
* reload.c, reload1.c, reorg.c, sched.c, stmt.c, stupid.c: Likewise.
* unroll.c, varasm.c: Likewise.
* config/alpha/alpha.c, config/alpha/alpha.md: Likewise.
From-SVN: r17357
1998-01-15 00:10:50 +01:00
|
|
|
|
gen_rtx_fmt_e (inc_code, Pmode, q),
|
1994-08-11 19:13:20 +02:00
|
|
|
|
1);
|
|
|
|
|
validate_change (incr, &XEXP (y, 0), q, 1);
|
|
|
|
|
if (! apply_change_group ())
|
|
|
|
|
return;
|
|
|
|
|
|
|
|
|
|
/* We now know we'll be doing this change, so emit the
|
|
|
|
|
new insn(s) and do the updates. */
|
1992-01-15 22:33:30 +01:00
|
|
|
|
emit_insns_before (insns, insn);
|
1992-02-01 03:43:46 +01:00
|
|
|
|
|
1999-02-26 00:45:42 +01:00
|
|
|
|
if (BLOCK_FOR_INSN (insn)->head == insn)
|
|
|
|
|
BLOCK_FOR_INSN (insn)->head = insns;
|
1992-02-01 03:43:46 +01:00
|
|
|
|
|
1992-01-15 22:33:30 +01:00
|
|
|
|
/* INCR will become a NOTE and INSN won't contain a
|
|
|
|
|
use of ADDR. If a use of ADDR was just placed in
|
|
|
|
|
the insn before INSN, make that the next use.
|
|
|
|
|
Otherwise, invalidate it. */
|
|
|
|
|
if (GET_CODE (PREV_INSN (insn)) == INSN
|
|
|
|
|
&& GET_CODE (PATTERN (PREV_INSN (insn))) == SET
|
|
|
|
|
&& SET_SRC (PATTERN (PREV_INSN (insn))) == addr)
|
|
|
|
|
reg_next_use[regno] = PREV_INSN (insn);
|
|
|
|
|
else
|
|
|
|
|
reg_next_use[regno] = 0;
|
|
|
|
|
|
|
|
|
|
addr = q;
|
|
|
|
|
regno = REGNO (q);
|
|
|
|
|
|
|
|
|
|
/* REGNO is now used in INCR which is below INSN, but
|
|
|
|
|
it previously wasn't live here. If we don't mark
|
|
|
|
|
it as needed, we'll put a REG_DEAD note for it
|
|
|
|
|
on this insn, which is incorrect. */
|
1997-06-05 12:24:03 +02:00
|
|
|
|
SET_REGNO_REG_SET (needed, regno);
|
1992-01-15 22:33:30 +01:00
|
|
|
|
|
|
|
|
|
/* If there are any calls between INSN and INCR, show
|
|
|
|
|
that REGNO now crosses them. */
|
|
|
|
|
for (temp = insn; temp != incr; temp = NEXT_INSN (temp))
|
|
|
|
|
if (GET_CODE (temp) == CALL_INSN)
|
1997-05-30 20:19:19 +02:00
|
|
|
|
REG_N_CALLS_CROSSED (regno)++;
|
1992-01-15 22:33:30 +01:00
|
|
|
|
}
|
1994-11-17 18:45:29 +01:00
|
|
|
|
else
|
|
|
|
|
return;
|
1992-01-15 22:33:30 +01:00
|
|
|
|
|
1994-08-11 19:13:20 +02:00
|
|
|
|
/* If we haven't returned, it means we were able to make the
|
|
|
|
|
auto-inc, so update the status. First, record that this insn
|
|
|
|
|
has an implicit side effect. */
|
|
|
|
|
|
|
|
|
|
REG_NOTES (insn)
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
= alloc_EXPR_LIST (REG_INC, addr, REG_NOTES (insn));
|
1994-08-11 19:13:20 +02:00
|
|
|
|
|
|
|
|
|
/* Modify the old increment-insn to simply copy
|
|
|
|
|
the already-incremented value of our register. */
|
|
|
|
|
if (! validate_change (incr, &SET_SRC (set), addr, 0))
|
|
|
|
|
abort ();
|
|
|
|
|
|
|
|
|
|
/* If that makes it a no-op (copying the register into itself) delete
|
|
|
|
|
it so it won't appear to be a "use" and a "set" of this
|
|
|
|
|
register. */
|
|
|
|
|
if (SET_DEST (set) == addr)
|
1992-01-15 22:33:30 +01:00
|
|
|
|
{
|
1994-08-11 19:13:20 +02:00
|
|
|
|
PUT_CODE (incr, NOTE);
|
|
|
|
|
NOTE_LINE_NUMBER (incr) = NOTE_INSN_DELETED;
|
|
|
|
|
NOTE_SOURCE_FILE (incr) = 0;
|
|
|
|
|
}
|
1992-01-15 22:33:30 +01:00
|
|
|
|
|
1994-08-11 19:13:20 +02:00
|
|
|
|
if (regno >= FIRST_PSEUDO_REGISTER)
|
|
|
|
|
{
|
|
|
|
|
/* Count an extra reference to the reg. When a reg is
|
|
|
|
|
incremented, spilling it is worse, so we want to make
|
|
|
|
|
that less likely. */
|
1997-05-30 20:19:19 +02:00
|
|
|
|
REG_N_REFS (regno) += loop_depth;
|
1994-08-11 19:13:20 +02:00
|
|
|
|
|
|
|
|
|
/* Count the increment as a setting of the register,
|
|
|
|
|
even though it isn't a SET in rtl. */
|
1997-05-30 20:19:19 +02:00
|
|
|
|
REG_N_SETS (regno)++;
|
1992-01-15 22:33:30 +01:00
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
#endif /* AUTO_INC_DEC */
|
|
|
|
|
|
|
|
|
|
/* Scan expression X and store a 1-bit in LIVE for each reg it uses.
|
|
|
|
|
This is done assuming the registers needed from X
|
|
|
|
|
are those that have 1-bits in NEEDED.
|
|
|
|
|
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
FLAGS is the set of enabled operations.
|
1992-01-15 22:33:30 +01:00
|
|
|
|
|
|
|
|
|
INSN is the containing instruction. If INSN is dead, this function is not
|
|
|
|
|
called. */
|
|
|
|
|
|
|
|
|
|
static void
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
mark_used_regs (needed, live, x, flags, insn)
|
1992-01-15 22:33:30 +01:00
|
|
|
|
regset needed;
|
|
|
|
|
regset live;
|
|
|
|
|
rtx x;
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
int flags;
|
1994-02-03 21:27:23 +01:00
|
|
|
|
rtx insn;
|
1992-01-15 22:33:30 +01:00
|
|
|
|
{
|
|
|
|
|
register RTX_CODE code;
|
|
|
|
|
register int regno;
|
|
|
|
|
int i;
|
|
|
|
|
|
|
|
|
|
retry:
|
|
|
|
|
code = GET_CODE (x);
|
|
|
|
|
switch (code)
|
|
|
|
|
{
|
|
|
|
|
case LABEL_REF:
|
|
|
|
|
case SYMBOL_REF:
|
|
|
|
|
case CONST_INT:
|
|
|
|
|
case CONST:
|
|
|
|
|
case CONST_DOUBLE:
|
|
|
|
|
case PC:
|
|
|
|
|
case ADDR_VEC:
|
|
|
|
|
case ADDR_DIFF_VEC:
|
|
|
|
|
return;
|
|
|
|
|
|
|
|
|
|
#ifdef HAVE_cc0
|
|
|
|
|
case CC0:
|
|
|
|
|
cc0_live = 1;
|
|
|
|
|
return;
|
|
|
|
|
#endif
|
|
|
|
|
|
1993-12-08 12:17:15 +01:00
|
|
|
|
case CLOBBER:
|
|
|
|
|
/* If we are clobbering a MEM, mark any registers inside the address
|
|
|
|
|
as being used. */
|
|
|
|
|
if (GET_CODE (XEXP (x, 0)) == MEM)
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
mark_used_regs (needed, live, XEXP (XEXP (x, 0), 0), flags, insn);
|
1993-12-08 12:17:15 +01:00
|
|
|
|
return;
|
|
|
|
|
|
1992-01-15 22:33:30 +01:00
|
|
|
|
case MEM:
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
/* Don't bother watching stores to mems if this is not the
|
|
|
|
|
final pass. We'll not be deleting dead stores this round. */
|
|
|
|
|
if (flags & PROP_SCAN_DEAD_CODE)
|
1999-01-18 04:01:26 +01:00
|
|
|
|
{
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
/* Invalidate the data for the last MEM stored, but only if MEM is
|
|
|
|
|
something that can be stored into. */
|
|
|
|
|
if (GET_CODE (XEXP (x, 0)) == SYMBOL_REF
|
|
|
|
|
&& CONSTANT_POOL_ADDRESS_P (XEXP (x, 0)))
|
|
|
|
|
; /* needn't clear the memory set list */
|
|
|
|
|
else
|
1999-01-18 04:01:26 +01:00
|
|
|
|
{
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
rtx temp = mem_set_list;
|
|
|
|
|
rtx prev = NULL_RTX;
|
1999-10-15 01:31:25 +02:00
|
|
|
|
rtx next;
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
|
|
|
|
|
while (temp)
|
1999-01-18 04:01:26 +01:00
|
|
|
|
{
|
1999-10-15 01:31:25 +02:00
|
|
|
|
next = XEXP (temp, 1);
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
if (anti_dependence (XEXP (temp, 0), x))
|
|
|
|
|
{
|
|
|
|
|
/* Splice temp out of the list. */
|
|
|
|
|
if (prev)
|
1999-10-15 01:31:25 +02:00
|
|
|
|
XEXP (prev, 1) = next;
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
else
|
1999-10-15 01:31:25 +02:00
|
|
|
|
mem_set_list = next;
|
|
|
|
|
free_EXPR_LIST_node (temp);
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
}
|
1999-01-18 04:01:26 +01:00
|
|
|
|
else
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
prev = temp;
|
1999-10-15 01:31:25 +02:00
|
|
|
|
temp = next;
|
1999-01-18 04:01:26 +01:00
|
|
|
|
}
|
|
|
|
|
}
|
1992-01-15 22:33:30 +01:00
|
|
|
|
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
/* If the memory reference had embedded side effects (autoincrement
|
|
|
|
|
address modes. Then we may need to kill some entries on the
|
|
|
|
|
memory set list. */
|
|
|
|
|
if (insn)
|
|
|
|
|
invalidate_mems_from_autoinc (insn);
|
|
|
|
|
}
|
1999-01-20 03:02:20 +01:00
|
|
|
|
|
1992-01-15 22:33:30 +01:00
|
|
|
|
#ifdef AUTO_INC_DEC
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
if (flags & PROP_AUTOINC)
|
|
|
|
|
find_auto_inc (needed, x, insn);
|
1992-01-15 22:33:30 +01:00
|
|
|
|
#endif
|
|
|
|
|
break;
|
|
|
|
|
|
1994-08-07 14:51:03 +02:00
|
|
|
|
case SUBREG:
|
|
|
|
|
if (GET_CODE (SUBREG_REG (x)) == REG
|
|
|
|
|
&& REGNO (SUBREG_REG (x)) >= FIRST_PSEUDO_REGISTER
|
|
|
|
|
&& (GET_MODE_SIZE (GET_MODE (x))
|
1995-03-18 22:57:23 +01:00
|
|
|
|
!= GET_MODE_SIZE (GET_MODE (SUBREG_REG (x)))))
|
1997-05-30 20:19:19 +02:00
|
|
|
|
REG_CHANGES_SIZE (REGNO (SUBREG_REG (x))) = 1;
|
1994-08-07 14:51:03 +02:00
|
|
|
|
|
|
|
|
|
/* While we're here, optimize this case. */
|
|
|
|
|
x = SUBREG_REG (x);
|
|
|
|
|
|
1995-05-11 15:46:51 +02:00
|
|
|
|
/* In case the SUBREG is not of a register, don't optimize */
|
1995-03-30 00:34:41 +02:00
|
|
|
|
if (GET_CODE (x) != REG)
|
1995-05-11 15:46:51 +02:00
|
|
|
|
{
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
mark_used_regs (needed, live, x, flags, insn);
|
1995-05-11 15:46:51 +02:00
|
|
|
|
return;
|
|
|
|
|
}
|
1995-03-30 00:34:41 +02:00
|
|
|
|
|
1996-07-04 00:07:53 +02:00
|
|
|
|
/* ... fall through ... */
|
1994-08-07 14:51:03 +02:00
|
|
|
|
|
1992-01-15 22:33:30 +01:00
|
|
|
|
case REG:
|
|
|
|
|
/* See a register other than being set
|
|
|
|
|
=> mark it as needed. */
|
|
|
|
|
|
|
|
|
|
regno = REGNO (x);
|
|
|
|
|
{
|
1997-07-14 12:49:58 +02:00
|
|
|
|
int some_needed = REGNO_REG_SET_P (needed, regno);
|
|
|
|
|
int some_not_needed = ! some_needed;
|
1992-01-15 22:33:30 +01:00
|
|
|
|
|
1997-06-05 12:24:03 +02:00
|
|
|
|
SET_REGNO_REG_SET (live, regno);
|
1996-05-11 00:33:30 +02:00
|
|
|
|
|
1992-01-15 22:33:30 +01:00
|
|
|
|
/* A hard reg in a wide mode may really be multiple registers.
|
|
|
|
|
If so, mark all of them just like the first. */
|
|
|
|
|
if (regno < FIRST_PSEUDO_REGISTER)
|
|
|
|
|
{
|
|
|
|
|
int n;
|
|
|
|
|
|
1992-02-11 23:35:04 +01:00
|
|
|
|
/* For stack ptr or fixed arg pointer,
|
1992-01-15 22:33:30 +01:00
|
|
|
|
nothing below can be necessary, so waste no more time. */
|
|
|
|
|
if (regno == STACK_POINTER_REGNUM
|
1993-09-24 21:40:36 +02:00
|
|
|
|
#if FRAME_POINTER_REGNUM != HARD_FRAME_POINTER_REGNUM
|
1999-05-31 10:43:04 +02:00
|
|
|
|
|| (regno == HARD_FRAME_POINTER_REGNUM
|
|
|
|
|
&& (! reload_completed || frame_pointer_needed))
|
1993-09-24 21:40:36 +02:00
|
|
|
|
#endif
|
1992-02-11 23:35:04 +01:00
|
|
|
|
#if FRAME_POINTER_REGNUM != ARG_POINTER_REGNUM
|
|
|
|
|
|| (regno == ARG_POINTER_REGNUM && fixed_regs[regno])
|
|
|
|
|
#endif
|
1999-05-31 10:43:04 +02:00
|
|
|
|
|| (regno == FRAME_POINTER_REGNUM
|
|
|
|
|
&& (! reload_completed || frame_pointer_needed)))
|
1992-01-15 22:33:30 +01:00
|
|
|
|
{
|
|
|
|
|
/* If this is a register we are going to try to eliminate,
|
|
|
|
|
don't mark it live here. If we are successful in
|
|
|
|
|
eliminating it, it need not be live unless it is used for
|
|
|
|
|
pseudos, in which case it will have been set live when
|
|
|
|
|
it was allocated to the pseudos. If the register will not
|
|
|
|
|
be eliminated, reload will set it live at that point. */
|
|
|
|
|
|
|
|
|
|
if (! TEST_HARD_REG_BIT (elim_reg_set, regno))
|
|
|
|
|
regs_ever_live[regno] = 1;
|
|
|
|
|
return;
|
|
|
|
|
}
|
|
|
|
|
/* No death notes for global register variables;
|
|
|
|
|
their values are live after this function exits. */
|
|
|
|
|
if (global_regs[regno])
|
1992-08-07 06:00:44 +02:00
|
|
|
|
{
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
if (flags & (PROP_LOG_LINKS | PROP_AUTOINC))
|
1992-08-07 06:00:44 +02:00
|
|
|
|
reg_next_use[regno] = insn;
|
|
|
|
|
return;
|
|
|
|
|
}
|
1992-01-15 22:33:30 +01:00
|
|
|
|
|
|
|
|
|
n = HARD_REGNO_NREGS (regno, GET_MODE (x));
|
|
|
|
|
while (--n > 0)
|
|
|
|
|
{
|
1997-06-05 12:24:03 +02:00
|
|
|
|
int regno_n = regno + n;
|
|
|
|
|
int needed_regno = REGNO_REG_SET_P (needed, regno_n);
|
1996-05-11 00:33:30 +02:00
|
|
|
|
|
1997-06-05 12:24:03 +02:00
|
|
|
|
SET_REGNO_REG_SET (live, regno_n);
|
|
|
|
|
some_needed |= needed_regno;
|
1997-06-10 13:06:10 +02:00
|
|
|
|
some_not_needed |= ! needed_regno;
|
1992-01-15 22:33:30 +01:00
|
|
|
|
}
|
|
|
|
|
}
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
|
|
|
|
|
if (flags & (PROP_LOG_LINKS | PROP_AUTOINC))
|
1992-01-15 22:33:30 +01:00
|
|
|
|
{
|
|
|
|
|
/* Record where each reg is used, so when the reg
|
|
|
|
|
is set we know the next insn that uses it. */
|
|
|
|
|
|
|
|
|
|
reg_next_use[regno] = insn;
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
}
|
|
|
|
|
if (flags & PROP_REG_INFO)
|
|
|
|
|
{
|
1992-01-15 22:33:30 +01:00
|
|
|
|
if (regno < FIRST_PSEUDO_REGISTER)
|
|
|
|
|
{
|
|
|
|
|
/* If a hard reg is being used,
|
|
|
|
|
record that this function does use it. */
|
|
|
|
|
|
|
|
|
|
i = HARD_REGNO_NREGS (regno, GET_MODE (x));
|
|
|
|
|
if (i == 0)
|
|
|
|
|
i = 1;
|
|
|
|
|
do
|
|
|
|
|
regs_ever_live[regno + --i] = 1;
|
|
|
|
|
while (i > 0);
|
|
|
|
|
}
|
|
|
|
|
else
|
|
|
|
|
{
|
|
|
|
|
/* Keep track of which basic block each reg appears in. */
|
|
|
|
|
|
|
|
|
|
register int blocknum = BLOCK_NUM (insn);
|
|
|
|
|
|
1997-05-30 20:19:19 +02:00
|
|
|
|
if (REG_BASIC_BLOCK (regno) == REG_BLOCK_UNKNOWN)
|
|
|
|
|
REG_BASIC_BLOCK (regno) = blocknum;
|
|
|
|
|
else if (REG_BASIC_BLOCK (regno) != blocknum)
|
|
|
|
|
REG_BASIC_BLOCK (regno) = REG_BLOCK_GLOBAL;
|
1992-01-15 22:33:30 +01:00
|
|
|
|
|
|
|
|
|
/* Count (weighted) number of uses of each reg. */
|
|
|
|
|
|
1997-05-30 20:19:19 +02:00
|
|
|
|
REG_N_REFS (regno) += loop_depth;
|
1992-01-15 22:33:30 +01:00
|
|
|
|
}
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
}
|
1992-01-15 22:33:30 +01:00
|
|
|
|
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
/* Record and count the insns in which a reg dies.
|
|
|
|
|
If it is used in this insn and was dead below the insn
|
|
|
|
|
then it dies in this insn. If it was set in this insn,
|
|
|
|
|
we do not make a REG_DEAD note; likewise if we already
|
|
|
|
|
made such a note. */
|
1992-01-15 22:33:30 +01:00
|
|
|
|
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
if (flags & PROP_DEATH_NOTES)
|
|
|
|
|
{
|
1996-05-11 00:33:30 +02:00
|
|
|
|
if (some_not_needed
|
1992-01-15 22:33:30 +01:00
|
|
|
|
&& ! dead_or_set_p (insn, x)
|
|
|
|
|
#if 0
|
|
|
|
|
&& (regno >= FIRST_PSEUDO_REGISTER || ! fixed_regs[regno])
|
|
|
|
|
#endif
|
|
|
|
|
)
|
|
|
|
|
{
|
1994-08-15 01:01:37 +02:00
|
|
|
|
/* Check for the case where the register dying partially
|
|
|
|
|
overlaps the register set by this insn. */
|
|
|
|
|
if (regno < FIRST_PSEUDO_REGISTER
|
|
|
|
|
&& HARD_REGNO_NREGS (regno, GET_MODE (x)) > 1)
|
|
|
|
|
{
|
1994-09-08 20:38:30 +02:00
|
|
|
|
int n = HARD_REGNO_NREGS (regno, GET_MODE (x));
|
1994-08-15 01:01:37 +02:00
|
|
|
|
while (--n >= 0)
|
|
|
|
|
some_needed |= dead_or_set_regno_p (insn, regno + n);
|
|
|
|
|
}
|
|
|
|
|
|
1992-01-15 22:33:30 +01:00
|
|
|
|
/* If none of the words in X is needed, make a REG_DEAD
|
|
|
|
|
note. Otherwise, we must make partial REG_DEAD notes. */
|
|
|
|
|
if (! some_needed)
|
|
|
|
|
{
|
|
|
|
|
REG_NOTES (insn)
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
= alloc_EXPR_LIST (REG_DEAD, x, REG_NOTES (insn));
|
1997-05-30 20:19:19 +02:00
|
|
|
|
REG_N_DEATHS (regno)++;
|
1992-01-15 22:33:30 +01:00
|
|
|
|
}
|
|
|
|
|
else
|
|
|
|
|
{
|
|
|
|
|
int i;
|
|
|
|
|
|
|
|
|
|
/* Don't make a REG_DEAD note for a part of a register
|
|
|
|
|
that is set in the insn. */
|
|
|
|
|
|
|
|
|
|
for (i = HARD_REGNO_NREGS (regno, GET_MODE (x)) - 1;
|
|
|
|
|
i >= 0; i--)
|
1997-06-05 12:24:03 +02:00
|
|
|
|
if (!REGNO_REG_SET_P (needed, regno + i)
|
1992-01-15 22:33:30 +01:00
|
|
|
|
&& ! dead_or_set_regno_p (insn, regno + i))
|
|
|
|
|
REG_NOTES (insn)
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
= (alloc_EXPR_LIST
|
|
|
|
|
(REG_DEAD, gen_rtx_REG (reg_raw_mode[regno + i],
|
|
|
|
|
regno + i),
|
|
|
|
|
REG_NOTES (insn)));
|
1992-01-15 22:33:30 +01:00
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
return;
|
|
|
|
|
|
|
|
|
|
case SET:
|
|
|
|
|
{
|
|
|
|
|
register rtx testreg = SET_DEST (x);
|
|
|
|
|
int mark_dest = 0;
|
|
|
|
|
|
|
|
|
|
/* If storing into MEM, don't show it as being used. But do
|
|
|
|
|
show the address as being used. */
|
|
|
|
|
if (GET_CODE (testreg) == MEM)
|
|
|
|
|
{
|
|
|
|
|
#ifdef AUTO_INC_DEC
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
if (flags & PROP_AUTOINC)
|
1992-01-15 22:33:30 +01:00
|
|
|
|
find_auto_inc (needed, testreg, insn);
|
|
|
|
|
#endif
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
mark_used_regs (needed, live, XEXP (testreg, 0), flags, insn);
|
|
|
|
|
mark_used_regs (needed, live, SET_SRC (x), flags, insn);
|
1992-01-15 22:33:30 +01:00
|
|
|
|
return;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Storing in STRICT_LOW_PART is like storing in a reg
|
|
|
|
|
in that this SET might be dead, so ignore it in TESTREG.
|
|
|
|
|
but in some other ways it is like using the reg.
|
|
|
|
|
|
|
|
|
|
Storing in a SUBREG or a bit field is like storing the entire
|
|
|
|
|
register in that if the register's value is not used
|
|
|
|
|
then this SET is not needed. */
|
|
|
|
|
while (GET_CODE (testreg) == STRICT_LOW_PART
|
|
|
|
|
|| GET_CODE (testreg) == ZERO_EXTRACT
|
|
|
|
|
|| GET_CODE (testreg) == SIGN_EXTRACT
|
|
|
|
|
|| GET_CODE (testreg) == SUBREG)
|
|
|
|
|
{
|
1995-03-18 22:57:23 +01:00
|
|
|
|
if (GET_CODE (testreg) == SUBREG
|
|
|
|
|
&& GET_CODE (SUBREG_REG (testreg)) == REG
|
|
|
|
|
&& REGNO (SUBREG_REG (testreg)) >= FIRST_PSEUDO_REGISTER
|
|
|
|
|
&& (GET_MODE_SIZE (GET_MODE (testreg))
|
|
|
|
|
!= GET_MODE_SIZE (GET_MODE (SUBREG_REG (testreg)))))
|
1997-05-30 20:19:19 +02:00
|
|
|
|
REG_CHANGES_SIZE (REGNO (SUBREG_REG (testreg))) = 1;
|
1995-03-18 22:57:23 +01:00
|
|
|
|
|
1992-01-15 22:33:30 +01:00
|
|
|
|
/* Modifying a single register in an alternate mode
|
|
|
|
|
does not use any of the old value. But these other
|
|
|
|
|
ways of storing in a register do use the old value. */
|
|
|
|
|
if (GET_CODE (testreg) == SUBREG
|
|
|
|
|
&& !(REG_SIZE (SUBREG_REG (testreg)) > REG_SIZE (testreg)))
|
|
|
|
|
;
|
|
|
|
|
else
|
|
|
|
|
mark_dest = 1;
|
|
|
|
|
|
|
|
|
|
testreg = XEXP (testreg, 0);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* If this is a store into a register,
|
|
|
|
|
recursively scan the value being stored. */
|
|
|
|
|
|
1998-09-12 03:03:36 +02:00
|
|
|
|
if ((GET_CODE (testreg) == PARALLEL
|
|
|
|
|
&& GET_MODE (testreg) == BLKmode)
|
|
|
|
|
|| (GET_CODE (testreg) == REG
|
1999-05-31 10:43:04 +02:00
|
|
|
|
&& (regno = REGNO (testreg), ! (regno == FRAME_POINTER_REGNUM
|
|
|
|
|
&& (! reload_completed || frame_pointer_needed)))
|
1993-09-24 21:40:36 +02:00
|
|
|
|
#if FRAME_POINTER_REGNUM != HARD_FRAME_POINTER_REGNUM
|
1999-05-31 10:43:04 +02:00
|
|
|
|
&& ! (regno == HARD_FRAME_POINTER_REGNUM
|
|
|
|
|
&& (! reload_completed || frame_pointer_needed))
|
1993-09-24 21:40:36 +02:00
|
|
|
|
#endif
|
1992-02-11 23:35:04 +01:00
|
|
|
|
#if FRAME_POINTER_REGNUM != ARG_POINTER_REGNUM
|
1998-09-12 03:03:36 +02:00
|
|
|
|
&& ! (regno == ARG_POINTER_REGNUM && fixed_regs[regno])
|
1992-02-11 23:35:04 +01:00
|
|
|
|
#endif
|
1998-09-12 03:03:36 +02:00
|
|
|
|
))
|
1992-08-07 06:00:44 +02:00
|
|
|
|
/* We used to exclude global_regs here, but that seems wrong.
|
|
|
|
|
Storing in them is like storing in mem. */
|
1992-01-15 22:33:30 +01:00
|
|
|
|
{
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
mark_used_regs (needed, live, SET_SRC (x), flags, insn);
|
1992-01-15 22:33:30 +01:00
|
|
|
|
if (mark_dest)
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
mark_used_regs (needed, live, SET_DEST (x), flags, insn);
|
1992-01-15 22:33:30 +01:00
|
|
|
|
return;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
case RETURN:
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
/* ??? This info should have been gotten from mark_regs_live_at_end,
|
|
|
|
|
as applied to the EXIT block, and propagated along the edge that
|
|
|
|
|
connects this block to the EXIT. */
|
1992-01-15 22:33:30 +01:00
|
|
|
|
break;
|
1997-11-02 22:19:36 +01:00
|
|
|
|
|
1999-03-27 16:18:32 +01:00
|
|
|
|
case ASM_OPERANDS:
|
|
|
|
|
case UNSPEC_VOLATILE:
|
|
|
|
|
case TRAP_IF:
|
|
|
|
|
case ASM_INPUT:
|
|
|
|
|
{
|
|
|
|
|
/* Traditional and volatile asm instructions must be considered to use
|
|
|
|
|
and clobber all hard registers, all pseudo-registers and all of
|
|
|
|
|
memory. So must TRAP_IF and UNSPEC_VOLATILE operations.
|
|
|
|
|
|
|
|
|
|
Consider for instance a volatile asm that changes the fpu rounding
|
|
|
|
|
mode. An insn should not be moved across this even if it only uses
|
|
|
|
|
pseudo-regs because it might give an incorrectly rounded result.
|
|
|
|
|
|
|
|
|
|
?!? Unfortunately, marking all hard registers as live causes massive
|
|
|
|
|
problems for the register allocator and marking all pseudos as live
|
|
|
|
|
creates mountains of uninitialized variable warnings.
|
|
|
|
|
|
|
|
|
|
So for now, just clear the memory set list and mark any regs
|
|
|
|
|
we can find in ASM_OPERANDS as used. */
|
|
|
|
|
if (code != ASM_OPERANDS || MEM_VOLATILE_P (x))
|
1999-10-15 01:31:25 +02:00
|
|
|
|
free_EXPR_LIST_list (&mem_set_list);
|
1999-03-27 16:18:32 +01:00
|
|
|
|
|
|
|
|
|
/* For all ASM_OPERANDS, we must traverse the vector of input operands.
|
|
|
|
|
We can not just fall through here since then we would be confused
|
|
|
|
|
by the ASM_INPUT rtx inside ASM_OPERANDS, which do not indicate
|
|
|
|
|
traditional asms unlike their normal usage. */
|
|
|
|
|
if (code == ASM_OPERANDS)
|
|
|
|
|
{
|
|
|
|
|
int j;
|
|
|
|
|
|
|
|
|
|
for (j = 0; j < ASM_OPERANDS_INPUT_LENGTH (x); j++)
|
|
|
|
|
mark_used_regs (needed, live, ASM_OPERANDS_INPUT (x, j),
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
flags, insn);
|
1999-03-27 16:18:32 +01:00
|
|
|
|
}
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
1997-11-02 22:19:36 +01:00
|
|
|
|
default:
|
|
|
|
|
break;
|
1992-01-15 22:33:30 +01:00
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Recursively scan the operands of this expression. */
|
|
|
|
|
|
|
|
|
|
{
|
rtl.h (rtx_format): Constify a char*.
* rtl.h (rtx_format): Constify a char*.
* rtl.c (rtx_format): Likewise.
(copy_rtx, copy_most_rtx, read_rtx): Likewise.
(init_rtl): Use accessor macro, not `rtx_format'.
* alias.c (rtx_equal_for_memref_p, find_symbolic_term): Constify a
char*.
* caller-save.c (mark_referenced_regs): Likewise.
* combine.c (subst, make_compound_operation, known_cond,
gen_rtx_combine, update_table_tick, get_last_value_validate,
use_crosses_set_p, mark_used_regs_combine, move_deaths): Likewise.
* cse.c (rtx_cost, mention_regs, canon_hash, exp_equiv_p,
refers_to_p, canon_reg, fold_rtx, cse_process_notes,
count_reg_usage): Likewise.
* emit-rtl.c (gen_rtx, copy_rtx_if_shared, reset_used_flags):
Likewise.
* final.c (leaf_renumber_regs_insn): Likewise.
* flow.c (mark_used_regs, find_use_as_address, dump_flow_info,
dump_edge_info, count_reg_references): Likewise.
* function.c (fixup_var_refs_1, walk_fixup_memory_subreg,
fixup_stack_1, purge_addressof_1, instantiate_virtual_regs_1):
Likewise.
* gcse.c (oprs_unchanged_p, hash_expr_1, expr_equiv_p,
oprs_not_set_p, expr_killed_p, compute_transp, find_used_regs,
add_label_notes): Likewise.
* genattrtab.c (attr_rtx, attr_copy_rtx, encode_units_mask,
clear_struct_flag, count_sub_rtxs, count_alternatives,
compares_alternatives_p, contained_in_p, walk_attr_value,
write_expr_attr_cache): Likewise.
* genconfig.c (walk_insn_part): Likewise.
* genemit.c (max_operand_1, gen_exp): Likewise.
* genextract.c (walk_rtx): Likewise.
* genflags.c (num_operands): Likewise.
* genoutput.c (scan_operands): Likewise.
* genpeep.c (match_rtx): Likewise.
* genrecog.c (add_to_sequence): Likewise.
* haifa-sched.c (may_trap_exp, sched_analyze_2, attach_deaths):
Likewise.
* integrate.c (save_constants, copy_for_inline,
copy_rtx_and_substitute, subst_constants, restore_constants):
Likewise.
* jump.c (mark_jump_label, invert_exp, redirect_exp,
rtx_renumbered_equal_p, rtx_equal_for_thread_p): Likewise.
* local-alloc.c (contains_replace_regs, memref_referenced_p):
Likewise.
* loop.c (record_excess_regs, rtx_equal_for_loop_p,
add_label_notes, replace_call_address, count_nonfixed_reads,
invariant_p, find_single_use_in_loop, find_mem_givs,
find_life_end, maybe_eliminate_biv_1, update_reg_last_use):
Likewise.
* print-rtl.c (reg_names, print_rtx): Likewise.
* recog.c (validate_replace_rtx_1, find_single_use_1): Likewise.
* reg-stack.c (stack_regs_mentioned_p, record_label_references,
record_reg_life_pat, swap_rtx_condition, goto_block_pat,
print_blocks): Likewise.
* regclass.c (fix_register, record_address_regs,
reg_scan_mark_refs): Likewise.
* regmove.c (stable_but_for_p): Likewise.
* reload.c (loc_mentioned_in_p, operands_match_p,
find_reloads_toplevsubst_reg_equivs, find_reloads_address_1,
copy_replacements, refers_to_regno_for_reload_p,
refers_to_mem_for_reload_p, find_inc_amount, regno_clobbered_p,
reload_when_needed_name, reg_class_names, debug_reload_to_stream):
Likewise.
* reload1.c (eliminate_regs, scan_paradoxical_subregs,
delete_address_reloads_1, count_occurrences,
reload_cse_mem_conflict_p, reload_combine_note_use,
add_auto_inc_notes): Likewise.
* resource.c (mark_referenced_resources, mark_set_resources):
Likewise.
* rtlanal.c (rtx_unstable_p, rtx_varies_p, rtx_addr_varies_p,
reg_mentioned_p, regs_set_between_p, modified_between_p,
modified_in_p, refers_to_regno_p, reg_overlap_mentioned_p,
rtx_equal_p, volatile_insn_p, volatile_refs_p, side_effects_p,
may_trap_p, inequality_comparisons_p, replace_rtx, replace_regs,
jmp_uses_reg_or_mem, for_each_rtx, regno_use_in): Likewise.
* sched.c (sched_analyze_2, attach_deaths): Likewise.
* stupid.c (stupid_mark_refs): Likewise.
* unroll.c (remap_split_bivs): Likewise.
* varasm.c (mark_constants): Likewise.
* a29k/a29k.c (uses_local_reg_p): Likewise.
* alpha/alpha.c (summarize_insn): Likewise.
* arm/arm.c (symbol_mentioned_p, label_mentioned_p,
eliminate_lr2ip): Likewise.
* arm/thumb.c (symbol_mentioned_p, label_mentioned_p): Likewise.
* i386/i386.c (symbolic_reference_mentioned_p, copy_all_rtx,
reg_mentioned_in_mem): Likewise.
* ns32k/ns32k.c (global_symbolic_reference_mentioned_p,
symbolic_reference_mentioned_p): Likewise.
* romp/romp.c (unsigned_comparisons_p, hash_rtx): Likewise.
* sh/sh.c (regs_used, mark_use): Likewise.
* vax/vax.c (vax_rtx_cost): Likewise.
From-SVN: r28784
1999-08-21 01:05:25 +02:00
|
|
|
|
register const char *fmt = GET_RTX_FORMAT (code);
|
1992-01-15 22:33:30 +01:00
|
|
|
|
register int i;
|
|
|
|
|
|
|
|
|
|
for (i = GET_RTX_LENGTH (code) - 1; i >= 0; i--)
|
|
|
|
|
{
|
|
|
|
|
if (fmt[i] == 'e')
|
|
|
|
|
{
|
|
|
|
|
/* Tail recursive case: save a function call level. */
|
|
|
|
|
if (i == 0)
|
|
|
|
|
{
|
|
|
|
|
x = XEXP (x, 0);
|
|
|
|
|
goto retry;
|
|
|
|
|
}
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
mark_used_regs (needed, live, XEXP (x, i), flags, insn);
|
1992-01-15 22:33:30 +01:00
|
|
|
|
}
|
|
|
|
|
else if (fmt[i] == 'E')
|
|
|
|
|
{
|
|
|
|
|
register int j;
|
|
|
|
|
for (j = 0; j < XVECLEN (x, i); j++)
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
mark_used_regs (needed, live, XVECEXP (x, i, j), flags, insn);
|
1992-01-15 22:33:30 +01:00
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
#ifdef AUTO_INC_DEC
|
|
|
|
|
|
|
|
|
|
static int
|
|
|
|
|
try_pre_increment_1 (insn)
|
|
|
|
|
rtx insn;
|
|
|
|
|
{
|
|
|
|
|
/* Find the next use of this reg. If in same basic block,
|
|
|
|
|
make it do pre-increment or pre-decrement if appropriate. */
|
1997-12-07 01:31:01 +01:00
|
|
|
|
rtx x = single_set (insn);
|
1992-07-06 22:04:00 +02:00
|
|
|
|
HOST_WIDE_INT amount = ((GET_CODE (SET_SRC (x)) == PLUS ? 1 : -1)
|
1992-01-15 22:33:30 +01:00
|
|
|
|
* INTVAL (XEXP (SET_SRC (x), 1)));
|
|
|
|
|
int regno = REGNO (SET_DEST (x));
|
|
|
|
|
rtx y = reg_next_use[regno];
|
|
|
|
|
if (y != 0
|
|
|
|
|
&& BLOCK_NUM (y) == BLOCK_NUM (insn)
|
1994-05-16 22:21:39 +02:00
|
|
|
|
/* Don't do this if the reg dies, or gets set in y; a standard addressing
|
1996-07-04 00:07:53 +02:00
|
|
|
|
mode would be better. */
|
1994-05-16 22:21:39 +02:00
|
|
|
|
&& ! dead_or_set_p (y, SET_DEST (x))
|
1997-12-07 01:31:01 +01:00
|
|
|
|
&& try_pre_increment (y, SET_DEST (x), amount))
|
1992-01-15 22:33:30 +01:00
|
|
|
|
{
|
|
|
|
|
/* We have found a suitable auto-increment
|
|
|
|
|
and already changed insn Y to do it.
|
|
|
|
|
So flush this increment-instruction. */
|
|
|
|
|
PUT_CODE (insn, NOTE);
|
|
|
|
|
NOTE_LINE_NUMBER (insn) = NOTE_INSN_DELETED;
|
|
|
|
|
NOTE_SOURCE_FILE (insn) = 0;
|
|
|
|
|
/* Count a reference to this reg for the increment
|
|
|
|
|
insn we are deleting. When a reg is incremented.
|
|
|
|
|
spilling it is worse, so we want to make that
|
|
|
|
|
less likely. */
|
|
|
|
|
if (regno >= FIRST_PSEUDO_REGISTER)
|
|
|
|
|
{
|
1997-05-30 20:19:19 +02:00
|
|
|
|
REG_N_REFS (regno) += loop_depth;
|
|
|
|
|
REG_N_SETS (regno)++;
|
1992-01-15 22:33:30 +01:00
|
|
|
|
}
|
|
|
|
|
return 1;
|
|
|
|
|
}
|
|
|
|
|
return 0;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Try to change INSN so that it does pre-increment or pre-decrement
|
|
|
|
|
addressing on register REG in order to add AMOUNT to REG.
|
|
|
|
|
AMOUNT is negative for pre-decrement.
|
|
|
|
|
Returns 1 if the change could be made.
|
|
|
|
|
This checks all about the validity of the result of modifying INSN. */
|
|
|
|
|
|
|
|
|
|
static int
|
|
|
|
|
try_pre_increment (insn, reg, amount)
|
|
|
|
|
rtx insn, reg;
|
1992-07-06 22:04:00 +02:00
|
|
|
|
HOST_WIDE_INT amount;
|
1992-01-15 22:33:30 +01:00
|
|
|
|
{
|
|
|
|
|
register rtx use;
|
|
|
|
|
|
|
|
|
|
/* Nonzero if we can try to make a pre-increment or pre-decrement.
|
|
|
|
|
For example, addl $4,r1; movl (r1),... can become movl +(r1),... */
|
|
|
|
|
int pre_ok = 0;
|
|
|
|
|
/* Nonzero if we can try to make a post-increment or post-decrement.
|
|
|
|
|
For example, addl $4,r1; movl -4(r1),... can become movl (r1)+,...
|
|
|
|
|
It is possible for both PRE_OK and POST_OK to be nonzero if the machine
|
|
|
|
|
supports both pre-inc and post-inc, or both pre-dec and post-dec. */
|
|
|
|
|
int post_ok = 0;
|
|
|
|
|
|
|
|
|
|
/* Nonzero if the opportunity actually requires post-inc or post-dec. */
|
|
|
|
|
int do_post = 0;
|
|
|
|
|
|
|
|
|
|
/* From the sign of increment, see which possibilities are conceivable
|
|
|
|
|
on this target machine. */
|
1998-11-25 00:15:19 +01:00
|
|
|
|
if (HAVE_PRE_INCREMENT && amount > 0)
|
1992-01-15 22:33:30 +01:00
|
|
|
|
pre_ok = 1;
|
1998-11-25 00:15:19 +01:00
|
|
|
|
if (HAVE_POST_INCREMENT && amount > 0)
|
1992-01-15 22:33:30 +01:00
|
|
|
|
post_ok = 1;
|
|
|
|
|
|
1998-11-25 00:15:19 +01:00
|
|
|
|
if (HAVE_PRE_DECREMENT && amount < 0)
|
1992-01-15 22:33:30 +01:00
|
|
|
|
pre_ok = 1;
|
1998-11-25 00:15:19 +01:00
|
|
|
|
if (HAVE_POST_DECREMENT && amount < 0)
|
1992-01-15 22:33:30 +01:00
|
|
|
|
post_ok = 1;
|
|
|
|
|
|
|
|
|
|
if (! (pre_ok || post_ok))
|
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
|
|
/* It is not safe to add a side effect to a jump insn
|
|
|
|
|
because if the incremented register is spilled and must be reloaded
|
|
|
|
|
there would be no way to store the incremented value back in memory. */
|
|
|
|
|
|
|
|
|
|
if (GET_CODE (insn) == JUMP_INSN)
|
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
|
|
use = 0;
|
|
|
|
|
if (pre_ok)
|
|
|
|
|
use = find_use_as_address (PATTERN (insn), reg, 0);
|
|
|
|
|
if (post_ok && (use == 0 || use == (rtx) 1))
|
|
|
|
|
{
|
|
|
|
|
use = find_use_as_address (PATTERN (insn), reg, -amount);
|
|
|
|
|
do_post = 1;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (use == 0 || use == (rtx) 1)
|
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
|
|
if (GET_MODE_SIZE (GET_MODE (use)) != (amount > 0 ? amount : - amount))
|
|
|
|
|
return 0;
|
|
|
|
|
|
1994-04-20 07:55:28 +02:00
|
|
|
|
/* See if this combination of instruction and addressing mode exists. */
|
|
|
|
|
if (! validate_change (insn, &XEXP (use, 0),
|
alias.c: Change all uses of gen_rtx(FOO...) to gen_rtx_FOO...
* alias.c: Change all uses of gen_rtx(FOO...) to gen_rtx_FOO;
change gen_rtx(expr...) to gen_rtx_fmt_foo(expr...).
* caller-save.c, calls.c, combine.c, cse.c: Likewise.
* dwarf2out.c, except.c, explow.c, expmed.c, expr.c: Likewise.
* final.c, flow.c, function.c, genpeep.c, haifa-sched.c: Likewise.
* halfpic.c, integrate.c, jump.c, local-alloc.c, loop.c: Likewise.
* profile.c, recog.c, reg-stack.c, regclass.c, regmove.c: Likewise.
* reload.c, reload1.c, reorg.c, sched.c, stmt.c, stupid.c: Likewise.
* unroll.c, varasm.c: Likewise.
* config/alpha/alpha.c, config/alpha/alpha.md: Likewise.
From-SVN: r17357
1998-01-15 00:10:50 +01:00
|
|
|
|
gen_rtx_fmt_e (amount > 0
|
|
|
|
|
? (do_post ? POST_INC : PRE_INC)
|
|
|
|
|
: (do_post ? POST_DEC : PRE_DEC),
|
|
|
|
|
Pmode, reg), 0))
|
1994-04-20 07:55:28 +02:00
|
|
|
|
return 0;
|
1992-01-15 22:33:30 +01:00
|
|
|
|
|
|
|
|
|
/* Record that this insn now has an implicit side effect on X. */
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
REG_NOTES (insn) = alloc_EXPR_LIST (REG_INC, reg, REG_NOTES (insn));
|
1992-01-15 22:33:30 +01:00
|
|
|
|
return 1;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
#endif /* AUTO_INC_DEC */
|
|
|
|
|
|
|
|
|
|
/* Find the place in the rtx X where REG is used as a memory address.
|
|
|
|
|
Return the MEM rtx that so uses it.
|
|
|
|
|
If PLUSCONST is nonzero, search instead for a memory address equivalent to
|
|
|
|
|
(plus REG (const_int PLUSCONST)).
|
|
|
|
|
|
|
|
|
|
If such an address does not appear, return 0.
|
|
|
|
|
If REG appears more than once, or is used other than in such an address,
|
|
|
|
|
return (rtx)1. */
|
|
|
|
|
|
1997-08-12 06:07:19 +02:00
|
|
|
|
rtx
|
1992-01-15 22:33:30 +01:00
|
|
|
|
find_use_as_address (x, reg, plusconst)
|
|
|
|
|
register rtx x;
|
|
|
|
|
rtx reg;
|
1994-02-03 21:27:23 +01:00
|
|
|
|
HOST_WIDE_INT plusconst;
|
1992-01-15 22:33:30 +01:00
|
|
|
|
{
|
|
|
|
|
enum rtx_code code = GET_CODE (x);
|
rtl.h (rtx_format): Constify a char*.
* rtl.h (rtx_format): Constify a char*.
* rtl.c (rtx_format): Likewise.
(copy_rtx, copy_most_rtx, read_rtx): Likewise.
(init_rtl): Use accessor macro, not `rtx_format'.
* alias.c (rtx_equal_for_memref_p, find_symbolic_term): Constify a
char*.
* caller-save.c (mark_referenced_regs): Likewise.
* combine.c (subst, make_compound_operation, known_cond,
gen_rtx_combine, update_table_tick, get_last_value_validate,
use_crosses_set_p, mark_used_regs_combine, move_deaths): Likewise.
* cse.c (rtx_cost, mention_regs, canon_hash, exp_equiv_p,
refers_to_p, canon_reg, fold_rtx, cse_process_notes,
count_reg_usage): Likewise.
* emit-rtl.c (gen_rtx, copy_rtx_if_shared, reset_used_flags):
Likewise.
* final.c (leaf_renumber_regs_insn): Likewise.
* flow.c (mark_used_regs, find_use_as_address, dump_flow_info,
dump_edge_info, count_reg_references): Likewise.
* function.c (fixup_var_refs_1, walk_fixup_memory_subreg,
fixup_stack_1, purge_addressof_1, instantiate_virtual_regs_1):
Likewise.
* gcse.c (oprs_unchanged_p, hash_expr_1, expr_equiv_p,
oprs_not_set_p, expr_killed_p, compute_transp, find_used_regs,
add_label_notes): Likewise.
* genattrtab.c (attr_rtx, attr_copy_rtx, encode_units_mask,
clear_struct_flag, count_sub_rtxs, count_alternatives,
compares_alternatives_p, contained_in_p, walk_attr_value,
write_expr_attr_cache): Likewise.
* genconfig.c (walk_insn_part): Likewise.
* genemit.c (max_operand_1, gen_exp): Likewise.
* genextract.c (walk_rtx): Likewise.
* genflags.c (num_operands): Likewise.
* genoutput.c (scan_operands): Likewise.
* genpeep.c (match_rtx): Likewise.
* genrecog.c (add_to_sequence): Likewise.
* haifa-sched.c (may_trap_exp, sched_analyze_2, attach_deaths):
Likewise.
* integrate.c (save_constants, copy_for_inline,
copy_rtx_and_substitute, subst_constants, restore_constants):
Likewise.
* jump.c (mark_jump_label, invert_exp, redirect_exp,
rtx_renumbered_equal_p, rtx_equal_for_thread_p): Likewise.
* local-alloc.c (contains_replace_regs, memref_referenced_p):
Likewise.
* loop.c (record_excess_regs, rtx_equal_for_loop_p,
add_label_notes, replace_call_address, count_nonfixed_reads,
invariant_p, find_single_use_in_loop, find_mem_givs,
find_life_end, maybe_eliminate_biv_1, update_reg_last_use):
Likewise.
* print-rtl.c (reg_names, print_rtx): Likewise.
* recog.c (validate_replace_rtx_1, find_single_use_1): Likewise.
* reg-stack.c (stack_regs_mentioned_p, record_label_references,
record_reg_life_pat, swap_rtx_condition, goto_block_pat,
print_blocks): Likewise.
* regclass.c (fix_register, record_address_regs,
reg_scan_mark_refs): Likewise.
* regmove.c (stable_but_for_p): Likewise.
* reload.c (loc_mentioned_in_p, operands_match_p,
find_reloads_toplevsubst_reg_equivs, find_reloads_address_1,
copy_replacements, refers_to_regno_for_reload_p,
refers_to_mem_for_reload_p, find_inc_amount, regno_clobbered_p,
reload_when_needed_name, reg_class_names, debug_reload_to_stream):
Likewise.
* reload1.c (eliminate_regs, scan_paradoxical_subregs,
delete_address_reloads_1, count_occurrences,
reload_cse_mem_conflict_p, reload_combine_note_use,
add_auto_inc_notes): Likewise.
* resource.c (mark_referenced_resources, mark_set_resources):
Likewise.
* rtlanal.c (rtx_unstable_p, rtx_varies_p, rtx_addr_varies_p,
reg_mentioned_p, regs_set_between_p, modified_between_p,
modified_in_p, refers_to_regno_p, reg_overlap_mentioned_p,
rtx_equal_p, volatile_insn_p, volatile_refs_p, side_effects_p,
may_trap_p, inequality_comparisons_p, replace_rtx, replace_regs,
jmp_uses_reg_or_mem, for_each_rtx, regno_use_in): Likewise.
* sched.c (sched_analyze_2, attach_deaths): Likewise.
* stupid.c (stupid_mark_refs): Likewise.
* unroll.c (remap_split_bivs): Likewise.
* varasm.c (mark_constants): Likewise.
* a29k/a29k.c (uses_local_reg_p): Likewise.
* alpha/alpha.c (summarize_insn): Likewise.
* arm/arm.c (symbol_mentioned_p, label_mentioned_p,
eliminate_lr2ip): Likewise.
* arm/thumb.c (symbol_mentioned_p, label_mentioned_p): Likewise.
* i386/i386.c (symbolic_reference_mentioned_p, copy_all_rtx,
reg_mentioned_in_mem): Likewise.
* ns32k/ns32k.c (global_symbolic_reference_mentioned_p,
symbolic_reference_mentioned_p): Likewise.
* romp/romp.c (unsigned_comparisons_p, hash_rtx): Likewise.
* sh/sh.c (regs_used, mark_use): Likewise.
* vax/vax.c (vax_rtx_cost): Likewise.
From-SVN: r28784
1999-08-21 01:05:25 +02:00
|
|
|
|
const char *fmt = GET_RTX_FORMAT (code);
|
1992-01-15 22:33:30 +01:00
|
|
|
|
register int i;
|
|
|
|
|
register rtx value = 0;
|
|
|
|
|
register rtx tem;
|
|
|
|
|
|
|
|
|
|
if (code == MEM && XEXP (x, 0) == reg && plusconst == 0)
|
|
|
|
|
return x;
|
|
|
|
|
|
|
|
|
|
if (code == MEM && GET_CODE (XEXP (x, 0)) == PLUS
|
|
|
|
|
&& XEXP (XEXP (x, 0), 0) == reg
|
|
|
|
|
&& GET_CODE (XEXP (XEXP (x, 0), 1)) == CONST_INT
|
|
|
|
|
&& INTVAL (XEXP (XEXP (x, 0), 1)) == plusconst)
|
|
|
|
|
return x;
|
|
|
|
|
|
|
|
|
|
if (code == SIGN_EXTRACT || code == ZERO_EXTRACT)
|
|
|
|
|
{
|
|
|
|
|
/* If REG occurs inside a MEM used in a bit-field reference,
|
|
|
|
|
that is unacceptable. */
|
|
|
|
|
if (find_use_as_address (XEXP (x, 0), reg, 0) != 0)
|
1992-08-03 03:37:21 +02:00
|
|
|
|
return (rtx) (HOST_WIDE_INT) 1;
|
1992-01-15 22:33:30 +01:00
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (x == reg)
|
1992-08-03 03:37:21 +02:00
|
|
|
|
return (rtx) (HOST_WIDE_INT) 1;
|
1992-01-15 22:33:30 +01:00
|
|
|
|
|
|
|
|
|
for (i = GET_RTX_LENGTH (code) - 1; i >= 0; i--)
|
|
|
|
|
{
|
|
|
|
|
if (fmt[i] == 'e')
|
|
|
|
|
{
|
|
|
|
|
tem = find_use_as_address (XEXP (x, i), reg, plusconst);
|
|
|
|
|
if (value == 0)
|
|
|
|
|
value = tem;
|
|
|
|
|
else if (tem != 0)
|
1992-08-03 03:37:21 +02:00
|
|
|
|
return (rtx) (HOST_WIDE_INT) 1;
|
1992-01-15 22:33:30 +01:00
|
|
|
|
}
|
|
|
|
|
if (fmt[i] == 'E')
|
|
|
|
|
{
|
|
|
|
|
register int j;
|
|
|
|
|
for (j = XVECLEN (x, i) - 1; j >= 0; j--)
|
|
|
|
|
{
|
|
|
|
|
tem = find_use_as_address (XVECEXP (x, i, j), reg, plusconst);
|
|
|
|
|
if (value == 0)
|
|
|
|
|
value = tem;
|
|
|
|
|
else if (tem != 0)
|
1992-08-03 03:37:21 +02:00
|
|
|
|
return (rtx) (HOST_WIDE_INT) 1;
|
1992-01-15 22:33:30 +01:00
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
return value;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Write information about registers and basic blocks into FILE.
|
|
|
|
|
This is part of making a debugging dump. */
|
|
|
|
|
|
|
|
|
|
void
|
|
|
|
|
dump_flow_info (file)
|
|
|
|
|
FILE *file;
|
|
|
|
|
{
|
|
|
|
|
register int i;
|
rtl.h (rtx_format): Constify a char*.
* rtl.h (rtx_format): Constify a char*.
* rtl.c (rtx_format): Likewise.
(copy_rtx, copy_most_rtx, read_rtx): Likewise.
(init_rtl): Use accessor macro, not `rtx_format'.
* alias.c (rtx_equal_for_memref_p, find_symbolic_term): Constify a
char*.
* caller-save.c (mark_referenced_regs): Likewise.
* combine.c (subst, make_compound_operation, known_cond,
gen_rtx_combine, update_table_tick, get_last_value_validate,
use_crosses_set_p, mark_used_regs_combine, move_deaths): Likewise.
* cse.c (rtx_cost, mention_regs, canon_hash, exp_equiv_p,
refers_to_p, canon_reg, fold_rtx, cse_process_notes,
count_reg_usage): Likewise.
* emit-rtl.c (gen_rtx, copy_rtx_if_shared, reset_used_flags):
Likewise.
* final.c (leaf_renumber_regs_insn): Likewise.
* flow.c (mark_used_regs, find_use_as_address, dump_flow_info,
dump_edge_info, count_reg_references): Likewise.
* function.c (fixup_var_refs_1, walk_fixup_memory_subreg,
fixup_stack_1, purge_addressof_1, instantiate_virtual_regs_1):
Likewise.
* gcse.c (oprs_unchanged_p, hash_expr_1, expr_equiv_p,
oprs_not_set_p, expr_killed_p, compute_transp, find_used_regs,
add_label_notes): Likewise.
* genattrtab.c (attr_rtx, attr_copy_rtx, encode_units_mask,
clear_struct_flag, count_sub_rtxs, count_alternatives,
compares_alternatives_p, contained_in_p, walk_attr_value,
write_expr_attr_cache): Likewise.
* genconfig.c (walk_insn_part): Likewise.
* genemit.c (max_operand_1, gen_exp): Likewise.
* genextract.c (walk_rtx): Likewise.
* genflags.c (num_operands): Likewise.
* genoutput.c (scan_operands): Likewise.
* genpeep.c (match_rtx): Likewise.
* genrecog.c (add_to_sequence): Likewise.
* haifa-sched.c (may_trap_exp, sched_analyze_2, attach_deaths):
Likewise.
* integrate.c (save_constants, copy_for_inline,
copy_rtx_and_substitute, subst_constants, restore_constants):
Likewise.
* jump.c (mark_jump_label, invert_exp, redirect_exp,
rtx_renumbered_equal_p, rtx_equal_for_thread_p): Likewise.
* local-alloc.c (contains_replace_regs, memref_referenced_p):
Likewise.
* loop.c (record_excess_regs, rtx_equal_for_loop_p,
add_label_notes, replace_call_address, count_nonfixed_reads,
invariant_p, find_single_use_in_loop, find_mem_givs,
find_life_end, maybe_eliminate_biv_1, update_reg_last_use):
Likewise.
* print-rtl.c (reg_names, print_rtx): Likewise.
* recog.c (validate_replace_rtx_1, find_single_use_1): Likewise.
* reg-stack.c (stack_regs_mentioned_p, record_label_references,
record_reg_life_pat, swap_rtx_condition, goto_block_pat,
print_blocks): Likewise.
* regclass.c (fix_register, record_address_regs,
reg_scan_mark_refs): Likewise.
* regmove.c (stable_but_for_p): Likewise.
* reload.c (loc_mentioned_in_p, operands_match_p,
find_reloads_toplevsubst_reg_equivs, find_reloads_address_1,
copy_replacements, refers_to_regno_for_reload_p,
refers_to_mem_for_reload_p, find_inc_amount, regno_clobbered_p,
reload_when_needed_name, reg_class_names, debug_reload_to_stream):
Likewise.
* reload1.c (eliminate_regs, scan_paradoxical_subregs,
delete_address_reloads_1, count_occurrences,
reload_cse_mem_conflict_p, reload_combine_note_use,
add_auto_inc_notes): Likewise.
* resource.c (mark_referenced_resources, mark_set_resources):
Likewise.
* rtlanal.c (rtx_unstable_p, rtx_varies_p, rtx_addr_varies_p,
reg_mentioned_p, regs_set_between_p, modified_between_p,
modified_in_p, refers_to_regno_p, reg_overlap_mentioned_p,
rtx_equal_p, volatile_insn_p, volatile_refs_p, side_effects_p,
may_trap_p, inequality_comparisons_p, replace_rtx, replace_regs,
jmp_uses_reg_or_mem, for_each_rtx, regno_use_in): Likewise.
* sched.c (sched_analyze_2, attach_deaths): Likewise.
* stupid.c (stupid_mark_refs): Likewise.
* unroll.c (remap_split_bivs): Likewise.
* varasm.c (mark_constants): Likewise.
* a29k/a29k.c (uses_local_reg_p): Likewise.
* alpha/alpha.c (summarize_insn): Likewise.
* arm/arm.c (symbol_mentioned_p, label_mentioned_p,
eliminate_lr2ip): Likewise.
* arm/thumb.c (symbol_mentioned_p, label_mentioned_p): Likewise.
* i386/i386.c (symbolic_reference_mentioned_p, copy_all_rtx,
reg_mentioned_in_mem): Likewise.
* ns32k/ns32k.c (global_symbolic_reference_mentioned_p,
symbolic_reference_mentioned_p): Likewise.
* romp/romp.c (unsigned_comparisons_p, hash_rtx): Likewise.
* sh/sh.c (regs_used, mark_use): Likewise.
* vax/vax.c (vax_rtx_cost): Likewise.
From-SVN: r28784
1999-08-21 01:05:25 +02:00
|
|
|
|
static const char * const reg_class_names[] = REG_CLASS_NAMES;
|
1992-01-15 22:33:30 +01:00
|
|
|
|
|
|
|
|
|
fprintf (file, "%d registers.\n", max_regno);
|
|
|
|
|
for (i = FIRST_PSEUDO_REGISTER; i < max_regno; i++)
|
1997-05-30 20:19:19 +02:00
|
|
|
|
if (REG_N_REFS (i))
|
1992-01-15 22:33:30 +01:00
|
|
|
|
{
|
1992-06-27 19:49:28 +02:00
|
|
|
|
enum reg_class class, altclass;
|
1992-01-15 22:33:30 +01:00
|
|
|
|
fprintf (file, "\nRegister %d used %d times across %d insns",
|
1997-05-30 20:19:19 +02:00
|
|
|
|
i, REG_N_REFS (i), REG_LIVE_LENGTH (i));
|
|
|
|
|
if (REG_BASIC_BLOCK (i) >= 0)
|
|
|
|
|
fprintf (file, " in block %d", REG_BASIC_BLOCK (i));
|
1998-05-13 14:18:27 +02:00
|
|
|
|
if (REG_N_SETS (i))
|
|
|
|
|
fprintf (file, "; set %d time%s", REG_N_SETS (i),
|
|
|
|
|
(REG_N_SETS (i) == 1) ? "" : "s");
|
|
|
|
|
if (REG_USERVAR_P (regno_reg_rtx[i]))
|
|
|
|
|
fprintf (file, "; user var");
|
1997-05-30 20:19:19 +02:00
|
|
|
|
if (REG_N_DEATHS (i) != 1)
|
|
|
|
|
fprintf (file, "; dies in %d places", REG_N_DEATHS (i));
|
|
|
|
|
if (REG_N_CALLS_CROSSED (i) == 1)
|
1992-01-15 22:33:30 +01:00
|
|
|
|
fprintf (file, "; crosses 1 call");
|
1997-05-30 20:19:19 +02:00
|
|
|
|
else if (REG_N_CALLS_CROSSED (i))
|
|
|
|
|
fprintf (file, "; crosses %d calls", REG_N_CALLS_CROSSED (i));
|
1992-01-15 22:33:30 +01:00
|
|
|
|
if (PSEUDO_REGNO_BYTES (i) != UNITS_PER_WORD)
|
|
|
|
|
fprintf (file, "; %d bytes", PSEUDO_REGNO_BYTES (i));
|
|
|
|
|
class = reg_preferred_class (i);
|
1992-06-27 19:49:28 +02:00
|
|
|
|
altclass = reg_alternate_class (i);
|
|
|
|
|
if (class != GENERAL_REGS || altclass != ALL_REGS)
|
1992-01-15 22:33:30 +01:00
|
|
|
|
{
|
1992-06-27 19:49:28 +02:00
|
|
|
|
if (altclass == ALL_REGS || class == ALL_REGS)
|
|
|
|
|
fprintf (file, "; pref %s", reg_class_names[(int) class]);
|
|
|
|
|
else if (altclass == NO_REGS)
|
1992-01-15 22:33:30 +01:00
|
|
|
|
fprintf (file, "; %s or none", reg_class_names[(int) class]);
|
|
|
|
|
else
|
1992-06-27 19:49:28 +02:00
|
|
|
|
fprintf (file, "; pref %s, else %s",
|
|
|
|
|
reg_class_names[(int) class],
|
|
|
|
|
reg_class_names[(int) altclass]);
|
1992-01-15 22:33:30 +01:00
|
|
|
|
}
|
|
|
|
|
if (REGNO_POINTER_FLAG (i))
|
|
|
|
|
fprintf (file, "; pointer");
|
|
|
|
|
fprintf (file, ".\n");
|
|
|
|
|
}
|
1999-02-26 00:45:42 +01:00
|
|
|
|
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
fprintf (file, "\n%d basic blocks, %d edges.\n", n_basic_blocks, n_edges);
|
1999-02-26 00:45:42 +01:00
|
|
|
|
for (i = 0; i < n_basic_blocks; i++)
|
|
|
|
|
{
|
|
|
|
|
register basic_block bb = BASIC_BLOCK (i);
|
|
|
|
|
register int regno;
|
|
|
|
|
register edge e;
|
|
|
|
|
|
|
|
|
|
fprintf (file, "\nBasic block %d: first insn %d, last %d.\n",
|
|
|
|
|
i, INSN_UID (bb->head), INSN_UID (bb->end));
|
|
|
|
|
|
|
|
|
|
fprintf (file, "Predecessors: ");
|
|
|
|
|
for (e = bb->pred; e ; e = e->pred_next)
|
|
|
|
|
dump_edge_info (file, e, 0);
|
|
|
|
|
|
|
|
|
|
fprintf (file, "\nSuccessors: ");
|
|
|
|
|
for (e = bb->succ; e ; e = e->succ_next)
|
|
|
|
|
dump_edge_info (file, e, 1);
|
|
|
|
|
|
|
|
|
|
fprintf (file, "\nRegisters live at start:");
|
|
|
|
|
if (bb->global_live_at_start)
|
|
|
|
|
{
|
|
|
|
|
for (regno = 0; regno < max_regno; regno++)
|
|
|
|
|
if (REGNO_REG_SET_P (bb->global_live_at_start, regno))
|
|
|
|
|
fprintf (file, " %d", regno);
|
|
|
|
|
}
|
|
|
|
|
else
|
|
|
|
|
fprintf (file, " n/a");
|
|
|
|
|
|
|
|
|
|
fprintf (file, "\nRegisters live at end:");
|
|
|
|
|
if (bb->global_live_at_end)
|
|
|
|
|
{
|
|
|
|
|
for (regno = 0; regno < max_regno; regno++)
|
|
|
|
|
if (REGNO_REG_SET_P (bb->global_live_at_end, regno))
|
|
|
|
|
fprintf (file, " %d", regno);
|
|
|
|
|
}
|
|
|
|
|
else
|
|
|
|
|
fprintf (file, " n/a");
|
|
|
|
|
|
|
|
|
|
putc('\n', file);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
putc('\n', file);
|
|
|
|
|
}
|
|
|
|
|
|
1999-10-27 05:24:24 +02:00
|
|
|
|
void
|
|
|
|
|
debug_flow_info ()
|
|
|
|
|
{
|
|
|
|
|
dump_flow_info (stderr);
|
|
|
|
|
}
|
|
|
|
|
|
1999-02-26 00:45:42 +01:00
|
|
|
|
static void
|
|
|
|
|
dump_edge_info (file, e, do_succ)
|
|
|
|
|
FILE *file;
|
|
|
|
|
edge e;
|
|
|
|
|
int do_succ;
|
|
|
|
|
{
|
|
|
|
|
basic_block side = (do_succ ? e->dest : e->src);
|
|
|
|
|
|
|
|
|
|
if (side == ENTRY_BLOCK_PTR)
|
|
|
|
|
fputs (" ENTRY", file);
|
|
|
|
|
else if (side == EXIT_BLOCK_PTR)
|
|
|
|
|
fputs (" EXIT", file);
|
|
|
|
|
else
|
|
|
|
|
fprintf (file, " %d", side->index);
|
|
|
|
|
|
|
|
|
|
if (e->flags)
|
|
|
|
|
{
|
rtl.h (rtx_format): Constify a char*.
* rtl.h (rtx_format): Constify a char*.
* rtl.c (rtx_format): Likewise.
(copy_rtx, copy_most_rtx, read_rtx): Likewise.
(init_rtl): Use accessor macro, not `rtx_format'.
* alias.c (rtx_equal_for_memref_p, find_symbolic_term): Constify a
char*.
* caller-save.c (mark_referenced_regs): Likewise.
* combine.c (subst, make_compound_operation, known_cond,
gen_rtx_combine, update_table_tick, get_last_value_validate,
use_crosses_set_p, mark_used_regs_combine, move_deaths): Likewise.
* cse.c (rtx_cost, mention_regs, canon_hash, exp_equiv_p,
refers_to_p, canon_reg, fold_rtx, cse_process_notes,
count_reg_usage): Likewise.
* emit-rtl.c (gen_rtx, copy_rtx_if_shared, reset_used_flags):
Likewise.
* final.c (leaf_renumber_regs_insn): Likewise.
* flow.c (mark_used_regs, find_use_as_address, dump_flow_info,
dump_edge_info, count_reg_references): Likewise.
* function.c (fixup_var_refs_1, walk_fixup_memory_subreg,
fixup_stack_1, purge_addressof_1, instantiate_virtual_regs_1):
Likewise.
* gcse.c (oprs_unchanged_p, hash_expr_1, expr_equiv_p,
oprs_not_set_p, expr_killed_p, compute_transp, find_used_regs,
add_label_notes): Likewise.
* genattrtab.c (attr_rtx, attr_copy_rtx, encode_units_mask,
clear_struct_flag, count_sub_rtxs, count_alternatives,
compares_alternatives_p, contained_in_p, walk_attr_value,
write_expr_attr_cache): Likewise.
* genconfig.c (walk_insn_part): Likewise.
* genemit.c (max_operand_1, gen_exp): Likewise.
* genextract.c (walk_rtx): Likewise.
* genflags.c (num_operands): Likewise.
* genoutput.c (scan_operands): Likewise.
* genpeep.c (match_rtx): Likewise.
* genrecog.c (add_to_sequence): Likewise.
* haifa-sched.c (may_trap_exp, sched_analyze_2, attach_deaths):
Likewise.
* integrate.c (save_constants, copy_for_inline,
copy_rtx_and_substitute, subst_constants, restore_constants):
Likewise.
* jump.c (mark_jump_label, invert_exp, redirect_exp,
rtx_renumbered_equal_p, rtx_equal_for_thread_p): Likewise.
* local-alloc.c (contains_replace_regs, memref_referenced_p):
Likewise.
* loop.c (record_excess_regs, rtx_equal_for_loop_p,
add_label_notes, replace_call_address, count_nonfixed_reads,
invariant_p, find_single_use_in_loop, find_mem_givs,
find_life_end, maybe_eliminate_biv_1, update_reg_last_use):
Likewise.
* print-rtl.c (reg_names, print_rtx): Likewise.
* recog.c (validate_replace_rtx_1, find_single_use_1): Likewise.
* reg-stack.c (stack_regs_mentioned_p, record_label_references,
record_reg_life_pat, swap_rtx_condition, goto_block_pat,
print_blocks): Likewise.
* regclass.c (fix_register, record_address_regs,
reg_scan_mark_refs): Likewise.
* regmove.c (stable_but_for_p): Likewise.
* reload.c (loc_mentioned_in_p, operands_match_p,
find_reloads_toplevsubst_reg_equivs, find_reloads_address_1,
copy_replacements, refers_to_regno_for_reload_p,
refers_to_mem_for_reload_p, find_inc_amount, regno_clobbered_p,
reload_when_needed_name, reg_class_names, debug_reload_to_stream):
Likewise.
* reload1.c (eliminate_regs, scan_paradoxical_subregs,
delete_address_reloads_1, count_occurrences,
reload_cse_mem_conflict_p, reload_combine_note_use,
add_auto_inc_notes): Likewise.
* resource.c (mark_referenced_resources, mark_set_resources):
Likewise.
* rtlanal.c (rtx_unstable_p, rtx_varies_p, rtx_addr_varies_p,
reg_mentioned_p, regs_set_between_p, modified_between_p,
modified_in_p, refers_to_regno_p, reg_overlap_mentioned_p,
rtx_equal_p, volatile_insn_p, volatile_refs_p, side_effects_p,
may_trap_p, inequality_comparisons_p, replace_rtx, replace_regs,
jmp_uses_reg_or_mem, for_each_rtx, regno_use_in): Likewise.
* sched.c (sched_analyze_2, attach_deaths): Likewise.
* stupid.c (stupid_mark_refs): Likewise.
* unroll.c (remap_split_bivs): Likewise.
* varasm.c (mark_constants): Likewise.
* a29k/a29k.c (uses_local_reg_p): Likewise.
* alpha/alpha.c (summarize_insn): Likewise.
* arm/arm.c (symbol_mentioned_p, label_mentioned_p,
eliminate_lr2ip): Likewise.
* arm/thumb.c (symbol_mentioned_p, label_mentioned_p): Likewise.
* i386/i386.c (symbolic_reference_mentioned_p, copy_all_rtx,
reg_mentioned_in_mem): Likewise.
* ns32k/ns32k.c (global_symbolic_reference_mentioned_p,
symbolic_reference_mentioned_p): Likewise.
* romp/romp.c (unsigned_comparisons_p, hash_rtx): Likewise.
* sh/sh.c (regs_used, mark_use): Likewise.
* vax/vax.c (vax_rtx_cost): Likewise.
From-SVN: r28784
1999-08-21 01:05:25 +02:00
|
|
|
|
static const char * const bitnames[] = {
|
1999-02-26 00:45:42 +01:00
|
|
|
|
"fallthru", "crit", "ab", "abcall", "eh", "fake"
|
|
|
|
|
};
|
|
|
|
|
int comma = 0;
|
|
|
|
|
int i, flags = e->flags;
|
|
|
|
|
|
|
|
|
|
fputc (' ', file);
|
|
|
|
|
fputc ('(', file);
|
|
|
|
|
for (i = 0; flags; i++)
|
|
|
|
|
if (flags & (1 << i))
|
|
|
|
|
{
|
|
|
|
|
flags &= ~(1 << i);
|
|
|
|
|
|
|
|
|
|
if (comma)
|
|
|
|
|
fputc (',', file);
|
|
|
|
|
if (i < (int)(sizeof (bitnames) / sizeof (*bitnames)))
|
|
|
|
|
fputs (bitnames[i], file);
|
|
|
|
|
else
|
|
|
|
|
fprintf (file, "%d", i);
|
|
|
|
|
comma = 1;
|
|
|
|
|
}
|
|
|
|
|
fputc (')', file);
|
|
|
|
|
}
|
1992-01-15 22:33:30 +01:00
|
|
|
|
}
|
1997-09-04 21:15:50 +02:00
|
|
|
|
|
|
|
|
|
|
|
|
|
|
/* Like print_rtl, but also print out live information for the start of each
|
|
|
|
|
basic block. */
|
|
|
|
|
|
|
|
|
|
void
|
|
|
|
|
print_rtl_with_bb (outf, rtx_first)
|
|
|
|
|
FILE *outf;
|
|
|
|
|
rtx rtx_first;
|
|
|
|
|
{
|
|
|
|
|
register rtx tmp_rtx;
|
|
|
|
|
|
|
|
|
|
if (rtx_first == 0)
|
|
|
|
|
fprintf (outf, "(nil)\n");
|
|
|
|
|
else
|
|
|
|
|
{
|
1999-02-26 00:45:42 +01:00
|
|
|
|
int i;
|
1997-09-04 21:15:50 +02:00
|
|
|
|
enum bb_state { NOT_IN_BB, IN_ONE_BB, IN_MULTIPLE_BB };
|
|
|
|
|
int max_uid = get_max_uid ();
|
Warning fixes:
* c-lex.c (yylex): Remove unused variable `bytes'.
* flow.c (print_rtl_with_bb): Cast the return value of alloca.
* function.c (assign_parms): Wrap variable `varargs_setup' in
macro SETUP_INCOMING_VARARGS.
(thread_prologue_and_epilogue_insns): Mark parameter `f' with
ATTRIBUTE_UNUSED.
* local-alloc.c (no_equiv): Likewise for parameter `store'.
* sched.c (schedule_insns): Remove unused variables `insn' and `next'.
* tlink.c (symbol_hash_newfunc, symbol_hash_lookup,
file_hash_newfunc, file_hash_lookup, demangled_hash_newfunc,
demangled_hash_lookup, symbol_push, symbol_pop, file_push,
file_pop, tlink_init, tlink_execute, frob_extension,
obstack_fgets, tfgets, pfgets, freadsym, read_repo_file,
maybe_tweak, recompile_files, read_repo_files,
demangle_new_symbols, scan_linker_output): Add static prototype.
(symbol_hash_newfunc, file_hash_newfunc, demangled_hash_newfunc):
Make the third argument a `hash_table_key'.
* toplev.c (debug_start_source_file): Mark parameter `filename'
with ATTRIBUTE_UNUSED.
From-SVN: r25871
1999-03-20 20:21:31 +01:00
|
|
|
|
basic_block *start = (basic_block *)
|
1999-11-02 00:19:44 +01:00
|
|
|
|
xcalloc (max_uid, sizeof (basic_block));
|
Warning fixes:
* c-lex.c (yylex): Remove unused variable `bytes'.
* flow.c (print_rtl_with_bb): Cast the return value of alloca.
* function.c (assign_parms): Wrap variable `varargs_setup' in
macro SETUP_INCOMING_VARARGS.
(thread_prologue_and_epilogue_insns): Mark parameter `f' with
ATTRIBUTE_UNUSED.
* local-alloc.c (no_equiv): Likewise for parameter `store'.
* sched.c (schedule_insns): Remove unused variables `insn' and `next'.
* tlink.c (symbol_hash_newfunc, symbol_hash_lookup,
file_hash_newfunc, file_hash_lookup, demangled_hash_newfunc,
demangled_hash_lookup, symbol_push, symbol_pop, file_push,
file_pop, tlink_init, tlink_execute, frob_extension,
obstack_fgets, tfgets, pfgets, freadsym, read_repo_file,
maybe_tweak, recompile_files, read_repo_files,
demangle_new_symbols, scan_linker_output): Add static prototype.
(symbol_hash_newfunc, file_hash_newfunc, demangled_hash_newfunc):
Make the third argument a `hash_table_key'.
* toplev.c (debug_start_source_file): Mark parameter `filename'
with ATTRIBUTE_UNUSED.
From-SVN: r25871
1999-03-20 20:21:31 +01:00
|
|
|
|
basic_block *end = (basic_block *)
|
1999-11-02 00:19:44 +01:00
|
|
|
|
xcalloc (max_uid, sizeof (basic_block));
|
1998-10-09 18:08:51 +02:00
|
|
|
|
enum bb_state *in_bb_p = (enum bb_state *)
|
1999-11-02 00:19:44 +01:00
|
|
|
|
xcalloc (max_uid, sizeof (enum bb_state));
|
1997-09-04 21:15:50 +02:00
|
|
|
|
|
1999-02-26 00:45:42 +01:00
|
|
|
|
for (i = n_basic_blocks - 1; i >= 0; i--)
|
1997-09-04 21:15:50 +02:00
|
|
|
|
{
|
1999-02-26 00:45:42 +01:00
|
|
|
|
basic_block bb = BASIC_BLOCK (i);
|
1997-09-04 21:15:50 +02:00
|
|
|
|
rtx x;
|
1999-02-26 00:45:42 +01:00
|
|
|
|
|
|
|
|
|
start[INSN_UID (bb->head)] = bb;
|
|
|
|
|
end[INSN_UID (bb->end)] = bb;
|
|
|
|
|
for (x = bb->head; x != NULL_RTX; x = NEXT_INSN (x))
|
1997-09-04 21:15:50 +02:00
|
|
|
|
{
|
1999-02-26 00:45:42 +01:00
|
|
|
|
enum bb_state state = IN_MULTIPLE_BB;
|
|
|
|
|
if (in_bb_p[INSN_UID(x)] == NOT_IN_BB)
|
|
|
|
|
state = IN_ONE_BB;
|
|
|
|
|
in_bb_p[INSN_UID(x)] = state;
|
|
|
|
|
|
|
|
|
|
if (x == bb->end)
|
1997-09-04 21:15:50 +02:00
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
for (tmp_rtx = rtx_first; NULL != tmp_rtx; tmp_rtx = NEXT_INSN (tmp_rtx))
|
|
|
|
|
{
|
1998-10-06 11:03:38 +02:00
|
|
|
|
int did_output;
|
1999-02-26 00:45:42 +01:00
|
|
|
|
basic_block bb;
|
1998-10-06 11:03:38 +02:00
|
|
|
|
|
1999-02-26 00:45:42 +01:00
|
|
|
|
if ((bb = start[INSN_UID (tmp_rtx)]) != NULL)
|
1997-09-04 21:15:50 +02:00
|
|
|
|
{
|
|
|
|
|
fprintf (outf, ";; Start of basic block %d, registers live:",
|
1999-02-26 00:45:42 +01:00
|
|
|
|
bb->index);
|
1997-09-04 21:15:50 +02:00
|
|
|
|
|
1999-02-26 00:45:42 +01:00
|
|
|
|
EXECUTE_IF_SET_IN_REG_SET (bb->global_live_at_start, 0, i,
|
1997-09-04 21:15:50 +02:00
|
|
|
|
{
|
|
|
|
|
fprintf (outf, " %d", i);
|
|
|
|
|
if (i < FIRST_PSEUDO_REGISTER)
|
|
|
|
|
fprintf (outf, " [%s]",
|
|
|
|
|
reg_names[i]);
|
|
|
|
|
});
|
|
|
|
|
putc ('\n', outf);
|
|
|
|
|
}
|
|
|
|
|
|
1999-01-27 02:43:17 +01:00
|
|
|
|
if (in_bb_p[INSN_UID(tmp_rtx)] == NOT_IN_BB
|
1997-09-04 21:15:50 +02:00
|
|
|
|
&& GET_CODE (tmp_rtx) != NOTE
|
1999-01-27 02:43:17 +01:00
|
|
|
|
&& GET_CODE (tmp_rtx) != BARRIER
|
|
|
|
|
&& ! obey_regdecls)
|
1997-09-04 21:15:50 +02:00
|
|
|
|
fprintf (outf, ";; Insn is not within a basic block\n");
|
1999-02-26 00:45:42 +01:00
|
|
|
|
else if (in_bb_p[INSN_UID(tmp_rtx)] == IN_MULTIPLE_BB)
|
1997-09-04 21:15:50 +02:00
|
|
|
|
fprintf (outf, ";; Insn is in multiple basic blocks\n");
|
|
|
|
|
|
1998-10-06 11:03:38 +02:00
|
|
|
|
did_output = print_rtl_single (outf, tmp_rtx);
|
1997-09-04 21:15:50 +02:00
|
|
|
|
|
1999-02-26 00:45:42 +01:00
|
|
|
|
if ((bb = end[INSN_UID (tmp_rtx)]) != NULL)
|
|
|
|
|
fprintf (outf, ";; End of basic block %d\n", bb->index);
|
1997-09-04 21:15:50 +02:00
|
|
|
|
|
1998-10-06 11:03:38 +02:00
|
|
|
|
if (did_output)
|
1998-06-29 23:40:49 +02:00
|
|
|
|
putc ('\n', outf);
|
1997-09-04 21:15:50 +02:00
|
|
|
|
}
|
1999-11-02 00:19:44 +01:00
|
|
|
|
|
|
|
|
|
free (start);
|
|
|
|
|
free (end);
|
|
|
|
|
free (in_bb_p);
|
1997-09-04 21:15:50 +02:00
|
|
|
|
}
|
1999-09-07 07:49:18 +02:00
|
|
|
|
|
|
|
|
|
if (current_function_epilogue_delay_list != 0)
|
|
|
|
|
{
|
|
|
|
|
fprintf (outf, "\n;; Insns in epilogue delay list:\n\n");
|
|
|
|
|
for (tmp_rtx = current_function_epilogue_delay_list; tmp_rtx != 0;
|
|
|
|
|
tmp_rtx = XEXP (tmp_rtx, 1))
|
|
|
|
|
print_rtl_single (outf, XEXP (tmp_rtx, 0));
|
|
|
|
|
}
|
1997-09-04 21:15:50 +02:00
|
|
|
|
}
|
1998-03-05 23:31:51 +01:00
|
|
|
|
|
1999-11-07 01:36:35 +01:00
|
|
|
|
/* Compute dominator relationships using new flow graph structures. */
|
1998-03-05 23:31:51 +01:00
|
|
|
|
void
|
1999-11-07 01:36:35 +01:00
|
|
|
|
compute_flow_dominators (dominators, post_dominators)
|
1998-03-05 23:31:51 +01:00
|
|
|
|
sbitmap *dominators;
|
|
|
|
|
sbitmap *post_dominators;
|
|
|
|
|
{
|
1999-11-07 01:36:35 +01:00
|
|
|
|
int bb;
|
1998-03-05 23:31:51 +01:00
|
|
|
|
sbitmap *temp_bitmap;
|
1999-11-07 01:36:35 +01:00
|
|
|
|
edge e;
|
|
|
|
|
basic_block *worklist, *tos;
|
|
|
|
|
|
|
|
|
|
/* Allocate a worklist array/queue. Entries are only added to the
|
|
|
|
|
list if they were not already on the list. So the size is
|
|
|
|
|
bounded by the number of basic blocks. */
|
|
|
|
|
tos = worklist = (basic_block *) xmalloc (sizeof (basic_block)
|
|
|
|
|
* n_basic_blocks);
|
1998-03-05 23:31:51 +01:00
|
|
|
|
|
|
|
|
|
temp_bitmap = sbitmap_vector_alloc (n_basic_blocks, n_basic_blocks);
|
|
|
|
|
sbitmap_vector_zero (temp_bitmap, n_basic_blocks);
|
|
|
|
|
|
1999-11-07 01:36:35 +01:00
|
|
|
|
if (dominators)
|
1998-03-05 23:31:51 +01:00
|
|
|
|
{
|
1999-11-11 10:21:12 +01:00
|
|
|
|
/* The optimistic setting of dominators requires us to put every
|
|
|
|
|
block on the work list initially. */
|
1999-11-10 08:05:42 +01:00
|
|
|
|
for (bb = 0; bb < n_basic_blocks; bb++)
|
1999-11-11 10:21:12 +01:00
|
|
|
|
{
|
|
|
|
|
*tos++ = BASIC_BLOCK (bb);
|
|
|
|
|
BASIC_BLOCK (bb)->aux = BASIC_BLOCK (bb);
|
|
|
|
|
}
|
1999-11-10 08:05:42 +01:00
|
|
|
|
|
|
|
|
|
/* We want a maximal solution, so initially assume everything dominates
|
|
|
|
|
everything else. */
|
1999-11-07 01:36:35 +01:00
|
|
|
|
sbitmap_vector_ones (dominators, n_basic_blocks);
|
|
|
|
|
|
1999-11-11 10:21:12 +01:00
|
|
|
|
/* Mark successors of the entry block so we can identify them below. */
|
1999-11-10 08:05:42 +01:00
|
|
|
|
for (e = ENTRY_BLOCK_PTR->succ; e; e = e->succ_next)
|
1999-11-11 10:21:12 +01:00
|
|
|
|
e->dest->aux = ENTRY_BLOCK_PTR;
|
1998-03-05 23:31:51 +01:00
|
|
|
|
|
1999-11-07 01:36:35 +01:00
|
|
|
|
/* Iterate until the worklist is empty. */
|
|
|
|
|
while (tos != worklist)
|
|
|
|
|
{
|
|
|
|
|
/* Take the first entry off the worklist. */
|
|
|
|
|
basic_block b = *--tos;
|
|
|
|
|
bb = b->index;
|
1998-06-27 17:51:49 +02:00
|
|
|
|
|
1999-11-10 08:05:42 +01:00
|
|
|
|
/* Compute the intersection of the dominators of all the
|
|
|
|
|
predecessor blocks.
|
|
|
|
|
|
|
|
|
|
If one of the predecessor blocks is the ENTRY block, then the
|
|
|
|
|
intersection of the dominators of the predecessor blocks is
|
|
|
|
|
defined as the null set. We can identify such blocks by the
|
|
|
|
|
special value in the AUX field in the block structure. */
|
|
|
|
|
if (b->aux == ENTRY_BLOCK_PTR)
|
|
|
|
|
{
|
|
|
|
|
/* Do not clear the aux field for blocks which are
|
|
|
|
|
successors of the ENTRY block. That way we we never
|
|
|
|
|
add them to the worklist again.
|
|
|
|
|
|
|
|
|
|
The intersect of dominators of the preds of this block is
|
|
|
|
|
defined as the null set. */
|
|
|
|
|
sbitmap_zero (temp_bitmap[bb]);
|
|
|
|
|
}
|
|
|
|
|
else
|
|
|
|
|
{
|
|
|
|
|
/* Clear the aux field of this block so it can be added to
|
|
|
|
|
the worklist again if necessary. */
|
|
|
|
|
b->aux = NULL;
|
|
|
|
|
sbitmap_intersection_of_preds (temp_bitmap[bb], dominators, bb);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Make sure each block always dominates itself. */
|
1999-11-07 01:36:35 +01:00
|
|
|
|
SET_BIT (temp_bitmap[bb], bb);
|
1999-08-25 20:01:48 +02:00
|
|
|
|
|
1999-11-07 01:36:35 +01:00
|
|
|
|
/* If the out state of this block changed, then we need to
|
|
|
|
|
add the successors of this block to the worklist if they
|
|
|
|
|
are not already on the worklist. */
|
|
|
|
|
if (sbitmap_a_and_b (dominators[bb], dominators[bb], temp_bitmap[bb]))
|
|
|
|
|
{
|
|
|
|
|
for (e = b->succ; e; e = e->succ_next)
|
|
|
|
|
{
|
|
|
|
|
if (!e->dest->aux && e->dest != EXIT_BLOCK_PTR)
|
|
|
|
|
{
|
|
|
|
|
*tos++ = e->dest;
|
|
|
|
|
e->dest->aux = e;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
}
|
1999-08-25 20:01:48 +02:00
|
|
|
|
|
1999-11-07 01:36:35 +01:00
|
|
|
|
if (post_dominators)
|
|
|
|
|
{
|
1999-11-11 10:21:12 +01:00
|
|
|
|
/* The optimistic setting of dominators requires us to put every
|
|
|
|
|
block on the work list initially. */
|
1999-11-10 08:05:42 +01:00
|
|
|
|
for (bb = 0; bb < n_basic_blocks; bb++)
|
1999-11-11 10:21:12 +01:00
|
|
|
|
{
|
|
|
|
|
*tos++ = BASIC_BLOCK (bb);
|
|
|
|
|
BASIC_BLOCK (bb)->aux = BASIC_BLOCK (bb);
|
|
|
|
|
}
|
1999-11-10 08:05:42 +01:00
|
|
|
|
|
|
|
|
|
/* We want a maximal solution, so initially assume everything post
|
|
|
|
|
dominates everything else. */
|
1999-11-07 01:36:35 +01:00
|
|
|
|
sbitmap_vector_ones (post_dominators, n_basic_blocks);
|
1999-08-25 20:01:48 +02:00
|
|
|
|
|
1999-11-11 10:21:12 +01:00
|
|
|
|
/* Mark predecessors of the exit block so we can identify them below. */
|
1999-11-10 08:05:42 +01:00
|
|
|
|
for (e = EXIT_BLOCK_PTR->pred; e; e = e->pred_next)
|
1999-11-11 10:21:12 +01:00
|
|
|
|
e->src->aux = EXIT_BLOCK_PTR;
|
1999-08-25 20:01:48 +02:00
|
|
|
|
|
1999-11-07 01:36:35 +01:00
|
|
|
|
/* Iterate until the worklist is empty. */
|
|
|
|
|
while (tos != worklist)
|
1999-08-25 20:01:48 +02:00
|
|
|
|
{
|
1999-11-07 01:36:35 +01:00
|
|
|
|
/* Take the first entry off the worklist. */
|
|
|
|
|
basic_block b = *--tos;
|
|
|
|
|
bb = b->index;
|
|
|
|
|
|
1999-11-10 08:05:42 +01:00
|
|
|
|
/* Compute the intersection of the post dominators of all the
|
|
|
|
|
successor blocks.
|
|
|
|
|
|
|
|
|
|
If one of the successor blocks is the EXIT block, then the
|
|
|
|
|
intersection of the dominators of the successor blocks is
|
|
|
|
|
defined as the null set. We can identify such blocks by the
|
|
|
|
|
special value in the AUX field in the block structure. */
|
|
|
|
|
if (b->aux == EXIT_BLOCK_PTR)
|
|
|
|
|
{
|
|
|
|
|
/* Do not clear the aux field for blocks which are
|
|
|
|
|
predecessors of the EXIT block. That way we we never
|
|
|
|
|
add them to the worklist again.
|
|
|
|
|
|
|
|
|
|
The intersect of dominators of the succs of this block is
|
|
|
|
|
defined as the null set. */
|
|
|
|
|
sbitmap_zero (temp_bitmap[bb]);
|
|
|
|
|
}
|
|
|
|
|
else
|
|
|
|
|
{
|
|
|
|
|
/* Clear the aux field of this block so it can be added to
|
|
|
|
|
the worklist again if necessary. */
|
|
|
|
|
b->aux = NULL;
|
|
|
|
|
sbitmap_intersection_of_succs (temp_bitmap[bb],
|
|
|
|
|
post_dominators, bb);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Make sure each block always post dominates itself. */
|
1999-08-25 20:01:48 +02:00
|
|
|
|
SET_BIT (temp_bitmap[bb], bb);
|
1999-11-07 01:36:35 +01:00
|
|
|
|
|
|
|
|
|
/* If the out state of this block changed, then we need to
|
|
|
|
|
add the successors of this block to the worklist if they
|
|
|
|
|
are not already on the worklist. */
|
|
|
|
|
if (sbitmap_a_and_b (post_dominators[bb],
|
|
|
|
|
post_dominators[bb],
|
|
|
|
|
temp_bitmap[bb]))
|
|
|
|
|
{
|
|
|
|
|
for (e = b->pred; e; e = e->pred_next)
|
|
|
|
|
{
|
|
|
|
|
if (!e->src->aux && e->src != ENTRY_BLOCK_PTR)
|
|
|
|
|
{
|
|
|
|
|
*tos++ = e->src;
|
|
|
|
|
e->src->aux = e;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
}
|
1999-08-25 20:01:48 +02:00
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
free (temp_bitmap);
|
|
|
|
|
}
|
|
|
|
|
|
1999-03-17 22:58:49 +01:00
|
|
|
|
/* Given DOMINATORS, compute the immediate dominators into IDOM. */
|
|
|
|
|
|
|
|
|
|
void
|
|
|
|
|
compute_immediate_dominators (idom, dominators)
|
|
|
|
|
int *idom;
|
|
|
|
|
sbitmap *dominators;
|
|
|
|
|
{
|
|
|
|
|
sbitmap *tmp;
|
|
|
|
|
int b;
|
|
|
|
|
|
|
|
|
|
tmp = sbitmap_vector_alloc (n_basic_blocks, n_basic_blocks);
|
|
|
|
|
|
|
|
|
|
/* Begin with tmp(n) = dom(n) - { n }. */
|
|
|
|
|
for (b = n_basic_blocks; --b >= 0; )
|
|
|
|
|
{
|
|
|
|
|
sbitmap_copy (tmp[b], dominators[b]);
|
|
|
|
|
RESET_BIT (tmp[b], b);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Subtract out all of our dominator's dominators. */
|
|
|
|
|
for (b = n_basic_blocks; --b >= 0; )
|
|
|
|
|
{
|
|
|
|
|
sbitmap tmp_b = tmp[b];
|
|
|
|
|
int s;
|
|
|
|
|
|
|
|
|
|
for (s = n_basic_blocks; --s >= 0; )
|
|
|
|
|
if (TEST_BIT (tmp_b, s))
|
|
|
|
|
sbitmap_difference (tmp_b, tmp_b, tmp[s]);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Find the one bit set in the bitmap and put it in the output array. */
|
|
|
|
|
for (b = n_basic_blocks; --b >= 0; )
|
|
|
|
|
{
|
|
|
|
|
int t;
|
|
|
|
|
EXECUTE_IF_SET_IN_SBITMAP (tmp[b], 0, t, { idom[b] = t; });
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
sbitmap_vector_free (tmp);
|
|
|
|
|
}
|
|
|
|
|
|
1998-06-27 17:51:49 +02:00
|
|
|
|
/* Count for a single SET rtx, X. */
|
|
|
|
|
|
|
|
|
|
static void
|
|
|
|
|
count_reg_sets_1 (x)
|
|
|
|
|
rtx x;
|
|
|
|
|
{
|
|
|
|
|
register int regno;
|
|
|
|
|
register rtx reg = SET_DEST (x);
|
|
|
|
|
|
|
|
|
|
/* Find the register that's set/clobbered. */
|
|
|
|
|
while (GET_CODE (reg) == SUBREG || GET_CODE (reg) == ZERO_EXTRACT
|
|
|
|
|
|| GET_CODE (reg) == SIGN_EXTRACT
|
|
|
|
|
|| GET_CODE (reg) == STRICT_LOW_PART)
|
|
|
|
|
reg = XEXP (reg, 0);
|
|
|
|
|
|
1998-09-12 03:03:36 +02:00
|
|
|
|
if (GET_CODE (reg) == PARALLEL
|
|
|
|
|
&& GET_MODE (reg) == BLKmode)
|
|
|
|
|
{
|
|
|
|
|
register int i;
|
|
|
|
|
for (i = XVECLEN (reg, 0) - 1; i >= 0; i--)
|
|
|
|
|
count_reg_sets_1 (XVECEXP (reg, 0, i));
|
|
|
|
|
return;
|
|
|
|
|
}
|
|
|
|
|
|
1998-06-27 17:51:49 +02:00
|
|
|
|
if (GET_CODE (reg) == REG)
|
|
|
|
|
{
|
|
|
|
|
regno = REGNO (reg);
|
|
|
|
|
if (regno >= FIRST_PSEUDO_REGISTER)
|
|
|
|
|
{
|
|
|
|
|
/* Count (weighted) references, stores, etc. This counts a
|
|
|
|
|
register twice if it is modified, but that is correct. */
|
|
|
|
|
REG_N_SETS (regno)++;
|
|
|
|
|
|
|
|
|
|
REG_N_REFS (regno) += loop_depth;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Increment REG_N_SETS for each SET or CLOBBER found in X; also increment
|
|
|
|
|
REG_N_REFS by the current loop depth for each SET or CLOBBER found. */
|
|
|
|
|
|
|
|
|
|
static void
|
|
|
|
|
count_reg_sets (x)
|
|
|
|
|
rtx x;
|
|
|
|
|
{
|
|
|
|
|
register RTX_CODE code = GET_CODE (x);
|
|
|
|
|
|
|
|
|
|
if (code == SET || code == CLOBBER)
|
|
|
|
|
count_reg_sets_1 (x);
|
|
|
|
|
else if (code == PARALLEL)
|
|
|
|
|
{
|
|
|
|
|
register int i;
|
|
|
|
|
for (i = XVECLEN (x, 0) - 1; i >= 0; i--)
|
|
|
|
|
{
|
|
|
|
|
code = GET_CODE (XVECEXP (x, 0, i));
|
|
|
|
|
if (code == SET || code == CLOBBER)
|
|
|
|
|
count_reg_sets_1 (XVECEXP (x, 0, i));
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Increment REG_N_REFS by the current loop depth each register reference
|
|
|
|
|
found in X. */
|
|
|
|
|
|
|
|
|
|
static void
|
|
|
|
|
count_reg_references (x)
|
|
|
|
|
rtx x;
|
|
|
|
|
{
|
|
|
|
|
register RTX_CODE code;
|
|
|
|
|
|
|
|
|
|
retry:
|
|
|
|
|
code = GET_CODE (x);
|
|
|
|
|
switch (code)
|
|
|
|
|
{
|
|
|
|
|
case LABEL_REF:
|
|
|
|
|
case SYMBOL_REF:
|
|
|
|
|
case CONST_INT:
|
|
|
|
|
case CONST:
|
|
|
|
|
case CONST_DOUBLE:
|
|
|
|
|
case PC:
|
|
|
|
|
case ADDR_VEC:
|
|
|
|
|
case ADDR_DIFF_VEC:
|
|
|
|
|
case ASM_INPUT:
|
|
|
|
|
return;
|
|
|
|
|
|
|
|
|
|
#ifdef HAVE_cc0
|
|
|
|
|
case CC0:
|
|
|
|
|
return;
|
|
|
|
|
#endif
|
|
|
|
|
|
|
|
|
|
case CLOBBER:
|
|
|
|
|
/* If we are clobbering a MEM, mark any registers inside the address
|
|
|
|
|
as being used. */
|
|
|
|
|
if (GET_CODE (XEXP (x, 0)) == MEM)
|
|
|
|
|
count_reg_references (XEXP (XEXP (x, 0), 0));
|
|
|
|
|
return;
|
|
|
|
|
|
|
|
|
|
case SUBREG:
|
|
|
|
|
/* While we're here, optimize this case. */
|
|
|
|
|
x = SUBREG_REG (x);
|
|
|
|
|
|
|
|
|
|
/* In case the SUBREG is not of a register, don't optimize */
|
|
|
|
|
if (GET_CODE (x) != REG)
|
|
|
|
|
{
|
|
|
|
|
count_reg_references (x);
|
|
|
|
|
return;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* ... fall through ... */
|
|
|
|
|
|
|
|
|
|
case REG:
|
|
|
|
|
if (REGNO (x) >= FIRST_PSEUDO_REGISTER)
|
|
|
|
|
REG_N_REFS (REGNO (x)) += loop_depth;
|
|
|
|
|
return;
|
|
|
|
|
|
|
|
|
|
case SET:
|
|
|
|
|
{
|
|
|
|
|
register rtx testreg = SET_DEST (x);
|
|
|
|
|
int mark_dest = 0;
|
|
|
|
|
|
|
|
|
|
/* If storing into MEM, don't show it as being used. But do
|
|
|
|
|
show the address as being used. */
|
|
|
|
|
if (GET_CODE (testreg) == MEM)
|
|
|
|
|
{
|
|
|
|
|
count_reg_references (XEXP (testreg, 0));
|
|
|
|
|
count_reg_references (SET_SRC (x));
|
|
|
|
|
return;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Storing in STRICT_LOW_PART is like storing in a reg
|
|
|
|
|
in that this SET might be dead, so ignore it in TESTREG.
|
|
|
|
|
but in some other ways it is like using the reg.
|
|
|
|
|
|
|
|
|
|
Storing in a SUBREG or a bit field is like storing the entire
|
|
|
|
|
register in that if the register's value is not used
|
|
|
|
|
then this SET is not needed. */
|
|
|
|
|
while (GET_CODE (testreg) == STRICT_LOW_PART
|
|
|
|
|
|| GET_CODE (testreg) == ZERO_EXTRACT
|
|
|
|
|
|| GET_CODE (testreg) == SIGN_EXTRACT
|
|
|
|
|
|| GET_CODE (testreg) == SUBREG)
|
|
|
|
|
{
|
|
|
|
|
/* Modifying a single register in an alternate mode
|
|
|
|
|
does not use any of the old value. But these other
|
|
|
|
|
ways of storing in a register do use the old value. */
|
|
|
|
|
if (GET_CODE (testreg) == SUBREG
|
|
|
|
|
&& !(REG_SIZE (SUBREG_REG (testreg)) > REG_SIZE (testreg)))
|
|
|
|
|
;
|
|
|
|
|
else
|
|
|
|
|
mark_dest = 1;
|
|
|
|
|
|
|
|
|
|
testreg = XEXP (testreg, 0);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* If this is a store into a register,
|
|
|
|
|
recursively scan the value being stored. */
|
|
|
|
|
|
1998-09-12 03:03:36 +02:00
|
|
|
|
if ((GET_CODE (testreg) == PARALLEL
|
|
|
|
|
&& GET_MODE (testreg) == BLKmode)
|
|
|
|
|
|| GET_CODE (testreg) == REG)
|
1998-06-27 17:51:49 +02:00
|
|
|
|
{
|
|
|
|
|
count_reg_references (SET_SRC (x));
|
|
|
|
|
if (mark_dest)
|
|
|
|
|
count_reg_references (SET_DEST (x));
|
|
|
|
|
return;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
default:
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Recursively scan the operands of this expression. */
|
|
|
|
|
|
|
|
|
|
{
|
rtl.h (rtx_format): Constify a char*.
* rtl.h (rtx_format): Constify a char*.
* rtl.c (rtx_format): Likewise.
(copy_rtx, copy_most_rtx, read_rtx): Likewise.
(init_rtl): Use accessor macro, not `rtx_format'.
* alias.c (rtx_equal_for_memref_p, find_symbolic_term): Constify a
char*.
* caller-save.c (mark_referenced_regs): Likewise.
* combine.c (subst, make_compound_operation, known_cond,
gen_rtx_combine, update_table_tick, get_last_value_validate,
use_crosses_set_p, mark_used_regs_combine, move_deaths): Likewise.
* cse.c (rtx_cost, mention_regs, canon_hash, exp_equiv_p,
refers_to_p, canon_reg, fold_rtx, cse_process_notes,
count_reg_usage): Likewise.
* emit-rtl.c (gen_rtx, copy_rtx_if_shared, reset_used_flags):
Likewise.
* final.c (leaf_renumber_regs_insn): Likewise.
* flow.c (mark_used_regs, find_use_as_address, dump_flow_info,
dump_edge_info, count_reg_references): Likewise.
* function.c (fixup_var_refs_1, walk_fixup_memory_subreg,
fixup_stack_1, purge_addressof_1, instantiate_virtual_regs_1):
Likewise.
* gcse.c (oprs_unchanged_p, hash_expr_1, expr_equiv_p,
oprs_not_set_p, expr_killed_p, compute_transp, find_used_regs,
add_label_notes): Likewise.
* genattrtab.c (attr_rtx, attr_copy_rtx, encode_units_mask,
clear_struct_flag, count_sub_rtxs, count_alternatives,
compares_alternatives_p, contained_in_p, walk_attr_value,
write_expr_attr_cache): Likewise.
* genconfig.c (walk_insn_part): Likewise.
* genemit.c (max_operand_1, gen_exp): Likewise.
* genextract.c (walk_rtx): Likewise.
* genflags.c (num_operands): Likewise.
* genoutput.c (scan_operands): Likewise.
* genpeep.c (match_rtx): Likewise.
* genrecog.c (add_to_sequence): Likewise.
* haifa-sched.c (may_trap_exp, sched_analyze_2, attach_deaths):
Likewise.
* integrate.c (save_constants, copy_for_inline,
copy_rtx_and_substitute, subst_constants, restore_constants):
Likewise.
* jump.c (mark_jump_label, invert_exp, redirect_exp,
rtx_renumbered_equal_p, rtx_equal_for_thread_p): Likewise.
* local-alloc.c (contains_replace_regs, memref_referenced_p):
Likewise.
* loop.c (record_excess_regs, rtx_equal_for_loop_p,
add_label_notes, replace_call_address, count_nonfixed_reads,
invariant_p, find_single_use_in_loop, find_mem_givs,
find_life_end, maybe_eliminate_biv_1, update_reg_last_use):
Likewise.
* print-rtl.c (reg_names, print_rtx): Likewise.
* recog.c (validate_replace_rtx_1, find_single_use_1): Likewise.
* reg-stack.c (stack_regs_mentioned_p, record_label_references,
record_reg_life_pat, swap_rtx_condition, goto_block_pat,
print_blocks): Likewise.
* regclass.c (fix_register, record_address_regs,
reg_scan_mark_refs): Likewise.
* regmove.c (stable_but_for_p): Likewise.
* reload.c (loc_mentioned_in_p, operands_match_p,
find_reloads_toplevsubst_reg_equivs, find_reloads_address_1,
copy_replacements, refers_to_regno_for_reload_p,
refers_to_mem_for_reload_p, find_inc_amount, regno_clobbered_p,
reload_when_needed_name, reg_class_names, debug_reload_to_stream):
Likewise.
* reload1.c (eliminate_regs, scan_paradoxical_subregs,
delete_address_reloads_1, count_occurrences,
reload_cse_mem_conflict_p, reload_combine_note_use,
add_auto_inc_notes): Likewise.
* resource.c (mark_referenced_resources, mark_set_resources):
Likewise.
* rtlanal.c (rtx_unstable_p, rtx_varies_p, rtx_addr_varies_p,
reg_mentioned_p, regs_set_between_p, modified_between_p,
modified_in_p, refers_to_regno_p, reg_overlap_mentioned_p,
rtx_equal_p, volatile_insn_p, volatile_refs_p, side_effects_p,
may_trap_p, inequality_comparisons_p, replace_rtx, replace_regs,
jmp_uses_reg_or_mem, for_each_rtx, regno_use_in): Likewise.
* sched.c (sched_analyze_2, attach_deaths): Likewise.
* stupid.c (stupid_mark_refs): Likewise.
* unroll.c (remap_split_bivs): Likewise.
* varasm.c (mark_constants): Likewise.
* a29k/a29k.c (uses_local_reg_p): Likewise.
* alpha/alpha.c (summarize_insn): Likewise.
* arm/arm.c (symbol_mentioned_p, label_mentioned_p,
eliminate_lr2ip): Likewise.
* arm/thumb.c (symbol_mentioned_p, label_mentioned_p): Likewise.
* i386/i386.c (symbolic_reference_mentioned_p, copy_all_rtx,
reg_mentioned_in_mem): Likewise.
* ns32k/ns32k.c (global_symbolic_reference_mentioned_p,
symbolic_reference_mentioned_p): Likewise.
* romp/romp.c (unsigned_comparisons_p, hash_rtx): Likewise.
* sh/sh.c (regs_used, mark_use): Likewise.
* vax/vax.c (vax_rtx_cost): Likewise.
From-SVN: r28784
1999-08-21 01:05:25 +02:00
|
|
|
|
register const char *fmt = GET_RTX_FORMAT (code);
|
1998-06-27 17:51:49 +02:00
|
|
|
|
register int i;
|
|
|
|
|
|
|
|
|
|
for (i = GET_RTX_LENGTH (code) - 1; i >= 0; i--)
|
|
|
|
|
{
|
|
|
|
|
if (fmt[i] == 'e')
|
|
|
|
|
{
|
|
|
|
|
/* Tail recursive case: save a function call level. */
|
|
|
|
|
if (i == 0)
|
|
|
|
|
{
|
|
|
|
|
x = XEXP (x, 0);
|
|
|
|
|
goto retry;
|
|
|
|
|
}
|
|
|
|
|
count_reg_references (XEXP (x, i));
|
|
|
|
|
}
|
|
|
|
|
else if (fmt[i] == 'E')
|
|
|
|
|
{
|
|
|
|
|
register int j;
|
|
|
|
|
for (j = 0; j < XVECLEN (x, i); j++)
|
|
|
|
|
count_reg_references (XVECEXP (x, i, j));
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Recompute register set/reference counts immediately prior to register
|
|
|
|
|
allocation.
|
|
|
|
|
|
|
|
|
|
This avoids problems with set/reference counts changing to/from values
|
|
|
|
|
which have special meanings to the register allocators.
|
|
|
|
|
|
|
|
|
|
Additionally, the reference counts are the primary component used by the
|
|
|
|
|
register allocators to prioritize pseudos for allocation to hard regs.
|
|
|
|
|
More accurate reference counts generally lead to better register allocation.
|
|
|
|
|
|
1998-12-13 01:59:38 +01:00
|
|
|
|
F is the first insn to be scanned.
|
|
|
|
|
LOOP_STEP denotes how much loop_depth should be incremented per
|
|
|
|
|
loop nesting level in order to increase the ref count more for references
|
|
|
|
|
in a loop.
|
|
|
|
|
|
1998-06-27 17:51:49 +02:00
|
|
|
|
It might be worthwhile to update REG_LIVE_LENGTH, REG_BASIC_BLOCK and
|
|
|
|
|
possibly other information which is used by the register allocators. */
|
|
|
|
|
|
1998-07-01 00:49:11 +02:00
|
|
|
|
void
|
1998-12-13 01:59:38 +01:00
|
|
|
|
recompute_reg_usage (f, loop_step)
|
1998-06-27 17:51:49 +02:00
|
|
|
|
rtx f;
|
1998-12-13 01:59:38 +01:00
|
|
|
|
int loop_step;
|
1998-06-27 17:51:49 +02:00
|
|
|
|
{
|
|
|
|
|
rtx insn;
|
|
|
|
|
int i, max_reg;
|
|
|
|
|
|
|
|
|
|
/* Clear out the old data. */
|
|
|
|
|
max_reg = max_reg_num ();
|
|
|
|
|
for (i = FIRST_PSEUDO_REGISTER; i < max_reg; i++)
|
|
|
|
|
{
|
|
|
|
|
REG_N_SETS (i) = 0;
|
|
|
|
|
REG_N_REFS (i) = 0;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Scan each insn in the chain and count how many times each register is
|
|
|
|
|
set/used. */
|
|
|
|
|
loop_depth = 1;
|
|
|
|
|
for (insn = f; insn; insn = NEXT_INSN (insn))
|
|
|
|
|
{
|
|
|
|
|
/* Keep track of loop depth. */
|
|
|
|
|
if (GET_CODE (insn) == NOTE)
|
|
|
|
|
{
|
|
|
|
|
/* Look for loop boundaries. */
|
|
|
|
|
if (NOTE_LINE_NUMBER (insn) == NOTE_INSN_LOOP_END)
|
1998-12-13 01:59:38 +01:00
|
|
|
|
loop_depth -= loop_step;
|
1998-06-27 17:51:49 +02:00
|
|
|
|
else if (NOTE_LINE_NUMBER (insn) == NOTE_INSN_LOOP_BEG)
|
1998-12-13 01:59:38 +01:00
|
|
|
|
loop_depth += loop_step;
|
1998-06-27 17:51:49 +02:00
|
|
|
|
|
|
|
|
|
/* If we have LOOP_DEPTH == 0, there has been a bookkeeping error.
|
|
|
|
|
Abort now rather than setting register status incorrectly. */
|
|
|
|
|
if (loop_depth == 0)
|
|
|
|
|
abort ();
|
|
|
|
|
}
|
|
|
|
|
else if (GET_RTX_CLASS (GET_CODE (insn)) == 'i')
|
|
|
|
|
{
|
|
|
|
|
rtx links;
|
|
|
|
|
|
|
|
|
|
/* This call will increment REG_N_SETS for each SET or CLOBBER
|
|
|
|
|
of a register in INSN. It will also increment REG_N_REFS
|
|
|
|
|
by the loop depth for each set of a register in INSN. */
|
|
|
|
|
count_reg_sets (PATTERN (insn));
|
|
|
|
|
|
|
|
|
|
/* count_reg_sets does not detect autoincrement address modes, so
|
|
|
|
|
detect them here by looking at the notes attached to INSN. */
|
|
|
|
|
for (links = REG_NOTES (insn); links; links = XEXP (links, 1))
|
|
|
|
|
{
|
|
|
|
|
if (REG_NOTE_KIND (links) == REG_INC)
|
|
|
|
|
/* Count (weighted) references, stores, etc. This counts a
|
|
|
|
|
register twice if it is modified, but that is correct. */
|
|
|
|
|
REG_N_SETS (REGNO (XEXP (links, 0)))++;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* This call will increment REG_N_REFS by the current loop depth for
|
|
|
|
|
each reference to a register in INSN. */
|
|
|
|
|
count_reg_references (PATTERN (insn));
|
|
|
|
|
|
|
|
|
|
/* count_reg_references will not include counts for arguments to
|
|
|
|
|
function calls, so detect them here by examining the
|
|
|
|
|
CALL_INSN_FUNCTION_USAGE data. */
|
|
|
|
|
if (GET_CODE (insn) == CALL_INSN)
|
|
|
|
|
{
|
|
|
|
|
rtx note;
|
|
|
|
|
|
|
|
|
|
for (note = CALL_INSN_FUNCTION_USAGE (insn);
|
|
|
|
|
note;
|
|
|
|
|
note = XEXP (note, 1))
|
|
|
|
|
if (GET_CODE (XEXP (note, 0)) == USE)
|
flow.c (propagate_block): Use XEXP not SET_DEST for a USE.
* flow.c (propagate_block): Use XEXP not SET_DEST for a USE.
(recompute_reg_usage): Likewise.
* rtlanal.c (find_regno_fusage): Likewise.
* rtl.c (rtl_check_failed_code1): New function.
(rtl_check_failed_code2): New.
* rtl.h (RTL_CHECK1, RTL_CHECK2, RTVEC_ELT): Parenthesize args.
(RTL_CHECKC1, RTL_CHECKC2): New.
(XC*): New accessor macros.
(NOTE_*, LABEL_NAME, LABEL_NUSES, ADDRESSOF_REGNO): Use them.
(ADDRESSOF_DECL, JUMP_LABEL, LABEL_REFS, LABEL_NEXTREF): Likewise.
(CONTAINING_INSN, REGNO, INTVAL, SUBREG_REG, SUBREG_WORD): Likewise.
(ASM_OPERANDS_*, MEM_ALIAS_SET, SET_SRC, SET_DEST): Likewise.
(TRAP_*, RANGE_INFO_*): Likewise.
From-SVN: r29089
1999-09-04 00:23:11 +02:00
|
|
|
|
count_reg_references (XEXP (XEXP (note, 0), 0));
|
1998-06-27 17:51:49 +02:00
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
}
|
1999-02-26 00:45:42 +01:00
|
|
|
|
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
/* Optionally removes all the REG_DEAD and REG_UNUSED notes from a set of
|
1999-10-29 23:45:05 +02:00
|
|
|
|
blocks. If BLOCKS is NULL, assume the universal set. Returns a count
|
|
|
|
|
of the number of registers that died. */
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
|
|
|
|
|
int
|
|
|
|
|
count_or_remove_death_notes (blocks, kill)
|
|
|
|
|
sbitmap blocks;
|
|
|
|
|
int kill;
|
|
|
|
|
{
|
|
|
|
|
int i, count = 0;
|
|
|
|
|
|
|
|
|
|
for (i = n_basic_blocks - 1; i >= 0; --i)
|
|
|
|
|
{
|
|
|
|
|
basic_block bb;
|
|
|
|
|
rtx insn;
|
|
|
|
|
|
1999-10-29 23:45:05 +02:00
|
|
|
|
if (blocks && ! TEST_BIT (blocks, i))
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
continue;
|
|
|
|
|
|
|
|
|
|
bb = BASIC_BLOCK (i);
|
|
|
|
|
|
|
|
|
|
for (insn = bb->head; ; insn = NEXT_INSN (insn))
|
|
|
|
|
{
|
|
|
|
|
if (GET_RTX_CLASS (GET_CODE (insn)) == 'i')
|
|
|
|
|
{
|
|
|
|
|
rtx *pprev = ®_NOTES (insn);
|
|
|
|
|
rtx link = *pprev;
|
|
|
|
|
|
|
|
|
|
while (link)
|
|
|
|
|
{
|
|
|
|
|
switch (REG_NOTE_KIND (link))
|
|
|
|
|
{
|
|
|
|
|
case REG_DEAD:
|
|
|
|
|
if (GET_CODE (XEXP (link, 0)) == REG)
|
|
|
|
|
{
|
|
|
|
|
rtx reg = XEXP (link, 0);
|
|
|
|
|
int n;
|
|
|
|
|
|
|
|
|
|
if (REGNO (reg) >= FIRST_PSEUDO_REGISTER)
|
|
|
|
|
n = 1;
|
|
|
|
|
else
|
|
|
|
|
n = HARD_REGNO_NREGS (REGNO (reg), GET_MODE (reg));
|
|
|
|
|
count += n;
|
|
|
|
|
}
|
|
|
|
|
/* FALLTHRU */
|
|
|
|
|
|
|
|
|
|
case REG_UNUSED:
|
|
|
|
|
if (kill)
|
|
|
|
|
{
|
|
|
|
|
rtx next = XEXP (link, 1);
|
|
|
|
|
free_EXPR_LIST_node (link);
|
|
|
|
|
*pprev = link = next;
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
/* FALLTHRU */
|
|
|
|
|
|
|
|
|
|
default:
|
|
|
|
|
pprev = &XEXP (link, 1);
|
|
|
|
|
link = *pprev;
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (insn == bb->end)
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
return count;
|
|
|
|
|
}
|
|
|
|
|
|
1999-02-26 00:45:42 +01:00
|
|
|
|
/* Record INSN's block as BB. */
|
|
|
|
|
|
|
|
|
|
void
|
|
|
|
|
set_block_for_insn (insn, bb)
|
|
|
|
|
rtx insn;
|
|
|
|
|
basic_block bb;
|
|
|
|
|
{
|
|
|
|
|
size_t uid = INSN_UID (insn);
|
|
|
|
|
if (uid >= basic_block_for_insn->num_elements)
|
|
|
|
|
{
|
|
|
|
|
int new_size;
|
|
|
|
|
|
|
|
|
|
/* Add one-eighth the size so we don't keep calling xrealloc. */
|
|
|
|
|
new_size = uid + (uid + 7) / 8;
|
|
|
|
|
|
|
|
|
|
VARRAY_GROW (basic_block_for_insn, new_size);
|
|
|
|
|
}
|
|
|
|
|
VARRAY_BB (basic_block_for_insn, uid) = bb;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Record INSN's block number as BB. */
|
|
|
|
|
/* ??? This has got to go. */
|
|
|
|
|
|
|
|
|
|
void
|
|
|
|
|
set_block_num (insn, bb)
|
|
|
|
|
rtx insn;
|
|
|
|
|
int bb;
|
|
|
|
|
{
|
|
|
|
|
set_block_for_insn (insn, BASIC_BLOCK (bb));
|
|
|
|
|
}
|
1999-04-07 00:10:53 +02:00
|
|
|
|
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
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|
/* Verify the CFG consistency. This function check some CFG invariants and
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aborts when something is wrong. Hope that this function will help to
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convert many optimization passes to preserve CFG consistent.
|
1999-08-25 00:35:55 +02:00
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Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
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|
Currently it does following checks:
|
1999-08-25 00:35:55 +02:00
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|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
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- test head/end pointers
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- overlapping of basic blocks
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- edge list corectness
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- headers of basic blocks (the NOTE_INSN_BASIC_BLOCK note)
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- tails of basic blocks (ensure that boundary is necesary)
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- scans body of the basic block for JUMP_INSN, CODE_LABEL
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and NOTE_INSN_BASIC_BLOCK
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- check that all insns are in the basic blocks
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(except the switch handling code, barriers and notes)
|
1999-08-25 00:35:55 +02:00
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|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
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|
In future it can be extended check a lot of other stuff as well
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(reachability of basic blocks, life information, etc. etc.). */
|
1999-08-25 00:35:55 +02:00
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|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
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void
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verify_flow_info ()
|
1999-08-25 00:35:55 +02:00
|
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{
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
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|
|
const int max_uid = get_max_uid ();
|
|
|
|
|
const rtx rtx_first = get_insns ();
|
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|
|
basic_block *bb_info;
|
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|
|
rtx x;
|
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|
int i, err = 0;
|
1999-08-25 00:35:55 +02:00
|
|
|
|
|
1999-11-02 00:19:44 +01:00
|
|
|
|
bb_info = (basic_block *) xcalloc (max_uid, sizeof (basic_block));
|
1999-08-25 00:35:55 +02:00
|
|
|
|
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
/* First pass check head/end pointers and set bb_info array used by
|
|
|
|
|
later passes. */
|
|
|
|
|
for (i = n_basic_blocks - 1; i >= 0; i--)
|
1999-08-25 00:35:55 +02:00
|
|
|
|
{
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
basic_block bb = BASIC_BLOCK (i);
|
1999-08-25 00:35:55 +02:00
|
|
|
|
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
/* Check the head pointer and make sure that it is pointing into
|
|
|
|
|
insn list. */
|
|
|
|
|
for (x = rtx_first; x != NULL_RTX; x = NEXT_INSN (x))
|
|
|
|
|
if (x == bb->head)
|
|
|
|
|
break;
|
|
|
|
|
if (!x)
|
|
|
|
|
{
|
|
|
|
|
error ("Head insn %d for block %d not found in the insn stream.",
|
|
|
|
|
INSN_UID (bb->head), bb->index);
|
|
|
|
|
err = 1;
|
|
|
|
|
}
|
1999-08-25 00:35:55 +02:00
|
|
|
|
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
/* Check the end pointer and make sure that it is pointing into
|
|
|
|
|
insn list. */
|
|
|
|
|
for (x = bb->head; x != NULL_RTX; x = NEXT_INSN (x))
|
1999-08-25 00:35:55 +02:00
|
|
|
|
{
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
if (bb_info[INSN_UID (x)] != NULL)
|
1999-08-25 00:35:55 +02:00
|
|
|
|
{
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
error ("Insn %d is in multiple basic blocks (%d and %d)",
|
|
|
|
|
INSN_UID (x), bb->index, bb_info[INSN_UID (x)]->index);
|
|
|
|
|
err = 1;
|
1999-08-25 00:35:55 +02:00
|
|
|
|
}
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
bb_info[INSN_UID (x)] = bb;
|
|
|
|
|
|
|
|
|
|
if (x == bb->end)
|
1999-08-25 00:35:55 +02:00
|
|
|
|
break;
|
|
|
|
|
}
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
if (!x)
|
|
|
|
|
{
|
|
|
|
|
error ("End insn %d for block %d not found in the insn stream.",
|
|
|
|
|
INSN_UID (bb->end), bb->index);
|
|
|
|
|
err = 1;
|
|
|
|
|
}
|
1999-08-25 00:35:55 +02:00
|
|
|
|
}
|
|
|
|
|
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
/* Now check the basic blocks (boundaries etc.) */
|
|
|
|
|
for (i = n_basic_blocks - 1; i >= 0; i--)
|
1999-08-25 00:35:55 +02:00
|
|
|
|
{
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
basic_block bb = BASIC_BLOCK (i);
|
|
|
|
|
/* Check corectness of edge lists */
|
|
|
|
|
edge e;
|
1999-08-25 00:35:55 +02:00
|
|
|
|
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
e = bb->succ;
|
|
|
|
|
while (e)
|
1999-08-25 00:35:55 +02:00
|
|
|
|
{
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
if (e->src != bb)
|
1999-08-25 00:35:55 +02:00
|
|
|
|
{
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
fprintf (stderr, "verify_flow_info: Basic block %d succ edge is corrupted\n",
|
|
|
|
|
bb->index);
|
|
|
|
|
fprintf (stderr, "Predecessor: ");
|
|
|
|
|
dump_edge_info (stderr, e, 0);
|
|
|
|
|
fprintf (stderr, "\nSuccessor: ");
|
|
|
|
|
dump_edge_info (stderr, e, 1);
|
|
|
|
|
fflush (stderr);
|
|
|
|
|
err = 1;
|
1999-08-25 00:35:55 +02:00
|
|
|
|
}
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
if (e->dest != EXIT_BLOCK_PTR)
|
1999-08-25 00:35:55 +02:00
|
|
|
|
{
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
edge e2 = e->dest->pred;
|
|
|
|
|
while (e2 && e2 != e)
|
|
|
|
|
e2 = e2->pred_next;
|
|
|
|
|
if (!e2)
|
|
|
|
|
{
|
|
|
|
|
error ("Basic block %i edge lists are corrupted", bb->index);
|
|
|
|
|
err = 1;
|
|
|
|
|
}
|
1999-08-25 00:35:55 +02:00
|
|
|
|
}
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
e = e->succ_next;
|
1999-08-25 00:35:55 +02:00
|
|
|
|
}
|
|
|
|
|
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
e = bb->pred;
|
|
|
|
|
while (e)
|
1999-08-25 00:35:55 +02:00
|
|
|
|
{
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
if (e->dest != bb)
|
1999-08-25 00:35:55 +02:00
|
|
|
|
{
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
error ("Basic block %d pred edge is corrupted", bb->index);
|
|
|
|
|
fputs ("Predecessor: ", stderr);
|
|
|
|
|
dump_edge_info (stderr, e, 0);
|
|
|
|
|
fputs ("\nSuccessor: ", stderr);
|
|
|
|
|
dump_edge_info (stderr, e, 1);
|
|
|
|
|
fputc ('\n', stderr);
|
|
|
|
|
err = 1;
|
1999-04-07 00:10:53 +02:00
|
|
|
|
}
|
|
|
|
|
if (e->src != ENTRY_BLOCK_PTR)
|
|
|
|
|
{
|
|
|
|
|
edge e2 = e->src->succ;
|
|
|
|
|
while (e2 && e2 != e)
|
|
|
|
|
e2 = e2->succ_next;
|
|
|
|
|
if (!e2)
|
|
|
|
|
{
|
system.h: Don't redefine abort or trim_filename.
1999-08-25 22:10 -0700 Zack Weinberg <zack@bitmover.com>
* system.h: Don't redefine abort or trim_filename.
* rtl.h: Define abort to fancy_abort (__FILE__, __LINE__, 0)
or fancy_abort (__FILE__, __LINE__, __FUNCTION__) depending on
whether or not __FUNCTION__ is available.
* tree.h: Duplicate rtl.h's definition of abort, for files
that don't include rtl.h. Delete all code to perform type
checking with a compiler other than GCC.
* varray.h: Delete all code to perform type checking with a
compiler other than GCC. Make VARRAY_CHECK() always evaluate
its arguments exactly once, using a statement expression.
Adjust the VARRAY_<type> accessor macros to match.
* toplev.h (fatal_insn, fatal_insn_not_found): Kill.
(_fatal_insn, _fatal_insn_not_found): New fns, take info on
caller's location. Define fatal_insn and fatal_insn_not_found
as macros that use _fatal_insn and _fatal_insn_not_found.
(fancy_abort, trim_filename): Kill prototypes.
* rtl.c (trim_filename): Move here from toplev.c.
(fancy_abort): New function.
(DIR_SEPARATOR): Provide default definition.
* tree.c (tree_check_failed, tree_class_check_failed): Go
through fancy_abort.
(tree_check, tree_class_check, cst_or_constructor_check,
expr_check): Delete.
* varray.c (varray_check_failed): New function.
* toplev.c (fatal_insn, fatal_insn_not_found): Replace with
_fatal_insn and _fatal_insn_not_found. Go through
fancy_abort.
(trim_filename, fancy_abort): Delete.
* builtins.c (expand_builtin_args_info): Report ICE with abort.
* except.c (start_catch_handler): Report ICE with error/abort
combo.
* final.c (output_operand_lossage): Likewise.
* flow.c (verify_flow_info): Likewise.
* gcc.c: Prototype fatal.
* gengenrtl.c: Undef abort after including rtl.h not system.h.
* genattr.c, genattrtab.c, genemit.c, genextract.c,
genflags.c, genopinit.c, genoutput.c, genpeep.c, genrecog.c:
Don't define fancy_abort.
From-SVN: r28889
1999-08-26 07:18:44 +02:00
|
|
|
|
error ("Basic block %i edge lists are corrupted", bb->index);
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
err = 1;
|
1999-04-07 00:10:53 +02:00
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
e = e->pred_next;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* OK pointers are correct. Now check the header of basic
|
|
|
|
|
block. It ought to contain optional CODE_LABEL followed
|
|
|
|
|
by NOTE_BASIC_BLOCK. */
|
|
|
|
|
x = bb->head;
|
|
|
|
|
if (GET_CODE (x) == CODE_LABEL)
|
|
|
|
|
{
|
|
|
|
|
if (bb->end == x)
|
|
|
|
|
{
|
system.h: Don't redefine abort or trim_filename.
1999-08-25 22:10 -0700 Zack Weinberg <zack@bitmover.com>
* system.h: Don't redefine abort or trim_filename.
* rtl.h: Define abort to fancy_abort (__FILE__, __LINE__, 0)
or fancy_abort (__FILE__, __LINE__, __FUNCTION__) depending on
whether or not __FUNCTION__ is available.
* tree.h: Duplicate rtl.h's definition of abort, for files
that don't include rtl.h. Delete all code to perform type
checking with a compiler other than GCC.
* varray.h: Delete all code to perform type checking with a
compiler other than GCC. Make VARRAY_CHECK() always evaluate
its arguments exactly once, using a statement expression.
Adjust the VARRAY_<type> accessor macros to match.
* toplev.h (fatal_insn, fatal_insn_not_found): Kill.
(_fatal_insn, _fatal_insn_not_found): New fns, take info on
caller's location. Define fatal_insn and fatal_insn_not_found
as macros that use _fatal_insn and _fatal_insn_not_found.
(fancy_abort, trim_filename): Kill prototypes.
* rtl.c (trim_filename): Move here from toplev.c.
(fancy_abort): New function.
(DIR_SEPARATOR): Provide default definition.
* tree.c (tree_check_failed, tree_class_check_failed): Go
through fancy_abort.
(tree_check, tree_class_check, cst_or_constructor_check,
expr_check): Delete.
* varray.c (varray_check_failed): New function.
* toplev.c (fatal_insn, fatal_insn_not_found): Replace with
_fatal_insn and _fatal_insn_not_found. Go through
fancy_abort.
(trim_filename, fancy_abort): Delete.
* builtins.c (expand_builtin_args_info): Report ICE with abort.
* except.c (start_catch_handler): Report ICE with error/abort
combo.
* final.c (output_operand_lossage): Likewise.
* flow.c (verify_flow_info): Likewise.
* gcc.c: Prototype fatal.
* gengenrtl.c: Undef abort after including rtl.h not system.h.
* genattr.c, genattrtab.c, genemit.c, genextract.c,
genflags.c, genopinit.c, genoutput.c, genpeep.c, genrecog.c:
Don't define fancy_abort.
From-SVN: r28889
1999-08-26 07:18:44 +02:00
|
|
|
|
error ("NOTE_INSN_BASIC_BLOCK is missing for block %d",
|
|
|
|
|
bb->index);
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
err = 1;
|
1999-04-07 00:10:53 +02:00
|
|
|
|
}
|
|
|
|
|
x = NEXT_INSN (x);
|
|
|
|
|
}
|
|
|
|
|
if (GET_CODE (x) != NOTE
|
|
|
|
|
|| NOTE_LINE_NUMBER (x) != NOTE_INSN_BASIC_BLOCK
|
|
|
|
|
|| NOTE_BASIC_BLOCK (x) != bb)
|
|
|
|
|
{
|
system.h: Don't redefine abort or trim_filename.
1999-08-25 22:10 -0700 Zack Weinberg <zack@bitmover.com>
* system.h: Don't redefine abort or trim_filename.
* rtl.h: Define abort to fancy_abort (__FILE__, __LINE__, 0)
or fancy_abort (__FILE__, __LINE__, __FUNCTION__) depending on
whether or not __FUNCTION__ is available.
* tree.h: Duplicate rtl.h's definition of abort, for files
that don't include rtl.h. Delete all code to perform type
checking with a compiler other than GCC.
* varray.h: Delete all code to perform type checking with a
compiler other than GCC. Make VARRAY_CHECK() always evaluate
its arguments exactly once, using a statement expression.
Adjust the VARRAY_<type> accessor macros to match.
* toplev.h (fatal_insn, fatal_insn_not_found): Kill.
(_fatal_insn, _fatal_insn_not_found): New fns, take info on
caller's location. Define fatal_insn and fatal_insn_not_found
as macros that use _fatal_insn and _fatal_insn_not_found.
(fancy_abort, trim_filename): Kill prototypes.
* rtl.c (trim_filename): Move here from toplev.c.
(fancy_abort): New function.
(DIR_SEPARATOR): Provide default definition.
* tree.c (tree_check_failed, tree_class_check_failed): Go
through fancy_abort.
(tree_check, tree_class_check, cst_or_constructor_check,
expr_check): Delete.
* varray.c (varray_check_failed): New function.
* toplev.c (fatal_insn, fatal_insn_not_found): Replace with
_fatal_insn and _fatal_insn_not_found. Go through
fancy_abort.
(trim_filename, fancy_abort): Delete.
* builtins.c (expand_builtin_args_info): Report ICE with abort.
* except.c (start_catch_handler): Report ICE with error/abort
combo.
* final.c (output_operand_lossage): Likewise.
* flow.c (verify_flow_info): Likewise.
* gcc.c: Prototype fatal.
* gengenrtl.c: Undef abort after including rtl.h not system.h.
* genattr.c, genattrtab.c, genemit.c, genextract.c,
genflags.c, genopinit.c, genoutput.c, genpeep.c, genrecog.c:
Don't define fancy_abort.
From-SVN: r28889
1999-08-26 07:18:44 +02:00
|
|
|
|
error ("NOTE_INSN_BASIC_BLOCK is missing for block %d\n",
|
1999-04-07 00:10:53 +02:00
|
|
|
|
bb->index);
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
err = 1;
|
1999-04-07 00:10:53 +02:00
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (bb->end == x)
|
|
|
|
|
{
|
|
|
|
|
/* Do checks for empty blocks here */
|
|
|
|
|
}
|
|
|
|
|
else
|
|
|
|
|
{
|
|
|
|
|
x = NEXT_INSN (x);
|
|
|
|
|
while (x)
|
|
|
|
|
{
|
|
|
|
|
if (GET_CODE (x) == NOTE
|
|
|
|
|
&& NOTE_LINE_NUMBER (x) == NOTE_INSN_BASIC_BLOCK)
|
|
|
|
|
{
|
system.h: Don't redefine abort or trim_filename.
1999-08-25 22:10 -0700 Zack Weinberg <zack@bitmover.com>
* system.h: Don't redefine abort or trim_filename.
* rtl.h: Define abort to fancy_abort (__FILE__, __LINE__, 0)
or fancy_abort (__FILE__, __LINE__, __FUNCTION__) depending on
whether or not __FUNCTION__ is available.
* tree.h: Duplicate rtl.h's definition of abort, for files
that don't include rtl.h. Delete all code to perform type
checking with a compiler other than GCC.
* varray.h: Delete all code to perform type checking with a
compiler other than GCC. Make VARRAY_CHECK() always evaluate
its arguments exactly once, using a statement expression.
Adjust the VARRAY_<type> accessor macros to match.
* toplev.h (fatal_insn, fatal_insn_not_found): Kill.
(_fatal_insn, _fatal_insn_not_found): New fns, take info on
caller's location. Define fatal_insn and fatal_insn_not_found
as macros that use _fatal_insn and _fatal_insn_not_found.
(fancy_abort, trim_filename): Kill prototypes.
* rtl.c (trim_filename): Move here from toplev.c.
(fancy_abort): New function.
(DIR_SEPARATOR): Provide default definition.
* tree.c (tree_check_failed, tree_class_check_failed): Go
through fancy_abort.
(tree_check, tree_class_check, cst_or_constructor_check,
expr_check): Delete.
* varray.c (varray_check_failed): New function.
* toplev.c (fatal_insn, fatal_insn_not_found): Replace with
_fatal_insn and _fatal_insn_not_found. Go through
fancy_abort.
(trim_filename, fancy_abort): Delete.
* builtins.c (expand_builtin_args_info): Report ICE with abort.
* except.c (start_catch_handler): Report ICE with error/abort
combo.
* final.c (output_operand_lossage): Likewise.
* flow.c (verify_flow_info): Likewise.
* gcc.c: Prototype fatal.
* gengenrtl.c: Undef abort after including rtl.h not system.h.
* genattr.c, genattrtab.c, genemit.c, genextract.c,
genflags.c, genopinit.c, genoutput.c, genpeep.c, genrecog.c:
Don't define fancy_abort.
From-SVN: r28889
1999-08-26 07:18:44 +02:00
|
|
|
|
error ("NOTE_INSN_BASIC_BLOCK %d in the middle of basic block %d",
|
1999-04-07 00:10:53 +02:00
|
|
|
|
INSN_UID (x), bb->index);
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
err = 1;
|
1999-04-07 00:10:53 +02:00
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (x == bb->end)
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
if (GET_CODE (x) == JUMP_INSN
|
|
|
|
|
|| GET_CODE (x) == CODE_LABEL
|
|
|
|
|
|| GET_CODE (x) == BARRIER)
|
|
|
|
|
{
|
system.h: Don't redefine abort or trim_filename.
1999-08-25 22:10 -0700 Zack Weinberg <zack@bitmover.com>
* system.h: Don't redefine abort or trim_filename.
* rtl.h: Define abort to fancy_abort (__FILE__, __LINE__, 0)
or fancy_abort (__FILE__, __LINE__, __FUNCTION__) depending on
whether or not __FUNCTION__ is available.
* tree.h: Duplicate rtl.h's definition of abort, for files
that don't include rtl.h. Delete all code to perform type
checking with a compiler other than GCC.
* varray.h: Delete all code to perform type checking with a
compiler other than GCC. Make VARRAY_CHECK() always evaluate
its arguments exactly once, using a statement expression.
Adjust the VARRAY_<type> accessor macros to match.
* toplev.h (fatal_insn, fatal_insn_not_found): Kill.
(_fatal_insn, _fatal_insn_not_found): New fns, take info on
caller's location. Define fatal_insn and fatal_insn_not_found
as macros that use _fatal_insn and _fatal_insn_not_found.
(fancy_abort, trim_filename): Kill prototypes.
* rtl.c (trim_filename): Move here from toplev.c.
(fancy_abort): New function.
(DIR_SEPARATOR): Provide default definition.
* tree.c (tree_check_failed, tree_class_check_failed): Go
through fancy_abort.
(tree_check, tree_class_check, cst_or_constructor_check,
expr_check): Delete.
* varray.c (varray_check_failed): New function.
* toplev.c (fatal_insn, fatal_insn_not_found): Replace with
_fatal_insn and _fatal_insn_not_found. Go through
fancy_abort.
(trim_filename, fancy_abort): Delete.
* builtins.c (expand_builtin_args_info): Report ICE with abort.
* except.c (start_catch_handler): Report ICE with error/abort
combo.
* final.c (output_operand_lossage): Likewise.
* flow.c (verify_flow_info): Likewise.
* gcc.c: Prototype fatal.
* gengenrtl.c: Undef abort after including rtl.h not system.h.
* genattr.c, genattrtab.c, genemit.c, genextract.c,
genflags.c, genopinit.c, genoutput.c, genpeep.c, genrecog.c:
Don't define fancy_abort.
From-SVN: r28889
1999-08-26 07:18:44 +02:00
|
|
|
|
error ("In basic block %d:", bb->index);
|
|
|
|
|
fatal_insn ("Flow control insn inside a basic block", x);
|
1999-04-07 00:10:53 +02:00
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
x = NEXT_INSN (x);
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
x = rtx_first;
|
|
|
|
|
while (x)
|
|
|
|
|
{
|
|
|
|
|
if (!bb_info[INSN_UID (x)])
|
|
|
|
|
{
|
|
|
|
|
switch (GET_CODE (x))
|
|
|
|
|
{
|
|
|
|
|
case BARRIER:
|
|
|
|
|
case NOTE:
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
case CODE_LABEL:
|
|
|
|
|
/* An addr_vec is placed outside any block block. */
|
|
|
|
|
if (NEXT_INSN (x)
|
|
|
|
|
&& GET_CODE (NEXT_INSN (x)) == JUMP_INSN
|
|
|
|
|
&& (GET_CODE (PATTERN (NEXT_INSN (x))) == ADDR_DIFF_VEC
|
|
|
|
|
|| GET_CODE (PATTERN (NEXT_INSN (x))) == ADDR_VEC))
|
|
|
|
|
{
|
|
|
|
|
x = NEXT_INSN (x);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* But in any case, non-deletable labels can appear anywhere. */
|
|
|
|
|
break;
|
|
|
|
|
|
|
|
|
|
default:
|
system.h: Don't redefine abort or trim_filename.
1999-08-25 22:10 -0700 Zack Weinberg <zack@bitmover.com>
* system.h: Don't redefine abort or trim_filename.
* rtl.h: Define abort to fancy_abort (__FILE__, __LINE__, 0)
or fancy_abort (__FILE__, __LINE__, __FUNCTION__) depending on
whether or not __FUNCTION__ is available.
* tree.h: Duplicate rtl.h's definition of abort, for files
that don't include rtl.h. Delete all code to perform type
checking with a compiler other than GCC.
* varray.h: Delete all code to perform type checking with a
compiler other than GCC. Make VARRAY_CHECK() always evaluate
its arguments exactly once, using a statement expression.
Adjust the VARRAY_<type> accessor macros to match.
* toplev.h (fatal_insn, fatal_insn_not_found): Kill.
(_fatal_insn, _fatal_insn_not_found): New fns, take info on
caller's location. Define fatal_insn and fatal_insn_not_found
as macros that use _fatal_insn and _fatal_insn_not_found.
(fancy_abort, trim_filename): Kill prototypes.
* rtl.c (trim_filename): Move here from toplev.c.
(fancy_abort): New function.
(DIR_SEPARATOR): Provide default definition.
* tree.c (tree_check_failed, tree_class_check_failed): Go
through fancy_abort.
(tree_check, tree_class_check, cst_or_constructor_check,
expr_check): Delete.
* varray.c (varray_check_failed): New function.
* toplev.c (fatal_insn, fatal_insn_not_found): Replace with
_fatal_insn and _fatal_insn_not_found. Go through
fancy_abort.
(trim_filename, fancy_abort): Delete.
* builtins.c (expand_builtin_args_info): Report ICE with abort.
* except.c (start_catch_handler): Report ICE with error/abort
combo.
* final.c (output_operand_lossage): Likewise.
* flow.c (verify_flow_info): Likewise.
* gcc.c: Prototype fatal.
* gengenrtl.c: Undef abort after including rtl.h not system.h.
* genattr.c, genattrtab.c, genemit.c, genextract.c,
genflags.c, genopinit.c, genoutput.c, genpeep.c, genrecog.c:
Don't define fancy_abort.
From-SVN: r28889
1999-08-26 07:18:44 +02:00
|
|
|
|
fatal_insn ("Insn outside basic block", x);
|
1999-04-07 00:10:53 +02:00
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
x = NEXT_INSN (x);
|
|
|
|
|
}
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
|
|
|
|
|
if (err)
|
|
|
|
|
abort ();
|
1999-11-02 00:19:44 +01:00
|
|
|
|
|
|
|
|
|
/* Clean up. */
|
|
|
|
|
free (bb_info);
|
1999-04-07 00:10:53 +02:00
|
|
|
|
}
|
1999-08-17 00:14:51 +02:00
|
|
|
|
|
|
|
|
|
/* Functions to access an edge list with a vector representation.
|
|
|
|
|
Enough data is kept such that given an index number, the
|
|
|
|
|
pred and succ that edge reprsents can be determined, or
|
|
|
|
|
given a pred and a succ, it's index number can be returned.
|
|
|
|
|
This allows algorithms which comsume a lot of memory to
|
|
|
|
|
represent the normally full matrix of edge (pred,succ) with a
|
|
|
|
|
single indexed vector, edge (EDGE_INDEX (pred, succ)), with no
|
|
|
|
|
wasted space in the client code due to sparse flow graphs. */
|
|
|
|
|
|
|
|
|
|
/* This functions initializes the edge list. Basically the entire
|
|
|
|
|
flowgraph is processed, and all edges are assigned a number,
|
|
|
|
|
and the data structure is filed in. */
|
|
|
|
|
struct edge_list *
|
|
|
|
|
create_edge_list ()
|
|
|
|
|
{
|
|
|
|
|
struct edge_list *elist;
|
|
|
|
|
edge e;
|
|
|
|
|
int num_edges;
|
1999-09-02 19:29:25 +02:00
|
|
|
|
int x;
|
1999-08-17 00:14:51 +02:00
|
|
|
|
int block_count;
|
|
|
|
|
|
|
|
|
|
block_count = n_basic_blocks + 2; /* Include the entry and exit blocks. */
|
|
|
|
|
|
|
|
|
|
num_edges = 0;
|
|
|
|
|
|
|
|
|
|
/* Determine the number of edges in the flow graph by counting successor
|
|
|
|
|
edges on each basic block. */
|
|
|
|
|
for (x = 0; x < n_basic_blocks; x++)
|
|
|
|
|
{
|
|
|
|
|
basic_block bb = BASIC_BLOCK (x);
|
|
|
|
|
|
|
|
|
|
for (e = bb->succ; e; e = e->succ_next)
|
|
|
|
|
num_edges++;
|
|
|
|
|
}
|
|
|
|
|
/* Don't forget successors of the entry block. */
|
|
|
|
|
for (e = ENTRY_BLOCK_PTR->succ; e; e = e->succ_next)
|
|
|
|
|
num_edges++;
|
|
|
|
|
|
1999-08-17 23:44:26 +02:00
|
|
|
|
elist = xmalloc (sizeof (struct edge_list));
|
1999-08-17 00:14:51 +02:00
|
|
|
|
elist->num_blocks = block_count;
|
|
|
|
|
elist->num_edges = num_edges;
|
1999-08-17 23:44:26 +02:00
|
|
|
|
elist->index_to_edge = xmalloc (sizeof (edge) * num_edges);
|
1999-08-17 00:14:51 +02:00
|
|
|
|
|
|
|
|
|
num_edges = 0;
|
|
|
|
|
|
|
|
|
|
/* Follow successors of the entry block, and register these edges. */
|
|
|
|
|
for (e = ENTRY_BLOCK_PTR->succ; e; e = e->succ_next)
|
|
|
|
|
{
|
|
|
|
|
elist->index_to_edge[num_edges] = e;
|
|
|
|
|
num_edges++;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
for (x = 0; x < n_basic_blocks; x++)
|
|
|
|
|
{
|
|
|
|
|
basic_block bb = BASIC_BLOCK (x);
|
|
|
|
|
|
|
|
|
|
/* Follow all successors of blocks, and register these edges. */
|
|
|
|
|
for (e = bb->succ; e; e = e->succ_next)
|
|
|
|
|
{
|
|
|
|
|
elist->index_to_edge[num_edges] = e;
|
|
|
|
|
num_edges++;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
return elist;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* This function free's memory associated with an edge list. */
|
|
|
|
|
void
|
|
|
|
|
free_edge_list (elist)
|
|
|
|
|
struct edge_list *elist;
|
|
|
|
|
{
|
|
|
|
|
if (elist)
|
|
|
|
|
{
|
|
|
|
|
free (elist->index_to_edge);
|
|
|
|
|
free (elist);
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* This function provides debug output showing an edge list. */
|
|
|
|
|
void
|
|
|
|
|
print_edge_list (f, elist)
|
|
|
|
|
FILE *f;
|
|
|
|
|
struct edge_list *elist;
|
|
|
|
|
{
|
|
|
|
|
int x;
|
|
|
|
|
fprintf(f, "Compressed edge list, %d BBs + entry & exit, and %d edges\n",
|
|
|
|
|
elist->num_blocks - 2, elist->num_edges);
|
|
|
|
|
|
|
|
|
|
for (x = 0; x < elist->num_edges; x++)
|
|
|
|
|
{
|
|
|
|
|
fprintf (f, " %-4d - edge(", x);
|
|
|
|
|
if (INDEX_EDGE_PRED_BB (elist, x) == ENTRY_BLOCK_PTR)
|
|
|
|
|
fprintf (f,"entry,");
|
|
|
|
|
else
|
|
|
|
|
fprintf (f,"%d,", INDEX_EDGE_PRED_BB (elist, x)->index);
|
|
|
|
|
|
|
|
|
|
if (INDEX_EDGE_SUCC_BB (elist, x) == EXIT_BLOCK_PTR)
|
|
|
|
|
fprintf (f,"exit)\n");
|
|
|
|
|
else
|
|
|
|
|
fprintf (f,"%d)\n", INDEX_EDGE_SUCC_BB (elist, x)->index);
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* This function provides an internal consistancy check of an edge list,
|
|
|
|
|
verifying that all edges are present, and that there are no
|
|
|
|
|
extra edges. */
|
|
|
|
|
void
|
|
|
|
|
verify_edge_list (f, elist)
|
|
|
|
|
FILE *f;
|
|
|
|
|
struct edge_list *elist;
|
|
|
|
|
{
|
|
|
|
|
int x, pred, succ, index;
|
|
|
|
|
edge e;
|
|
|
|
|
|
|
|
|
|
for (x = 0; x < n_basic_blocks; x++)
|
|
|
|
|
{
|
|
|
|
|
basic_block bb = BASIC_BLOCK (x);
|
|
|
|
|
|
|
|
|
|
for (e = bb->succ; e; e = e->succ_next)
|
|
|
|
|
{
|
|
|
|
|
pred = e->src->index;
|
|
|
|
|
succ = e->dest->index;
|
1999-09-23 17:07:26 +02:00
|
|
|
|
index = EDGE_INDEX (elist, e->src, e->dest);
|
1999-08-17 00:14:51 +02:00
|
|
|
|
if (index == EDGE_INDEX_NO_EDGE)
|
|
|
|
|
{
|
|
|
|
|
fprintf (f, "*p* No index for edge from %d to %d\n",pred, succ);
|
|
|
|
|
continue;
|
|
|
|
|
}
|
|
|
|
|
if (INDEX_EDGE_PRED_BB (elist, index)->index != pred)
|
|
|
|
|
fprintf (f, "*p* Pred for index %d should be %d not %d\n",
|
|
|
|
|
index, pred, INDEX_EDGE_PRED_BB (elist, index)->index);
|
|
|
|
|
if (INDEX_EDGE_SUCC_BB (elist, index)->index != succ)
|
|
|
|
|
fprintf (f, "*p* Succ for index %d should be %d not %d\n",
|
|
|
|
|
index, succ, INDEX_EDGE_SUCC_BB (elist, index)->index);
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
for (e = ENTRY_BLOCK_PTR->succ; e; e = e->succ_next)
|
|
|
|
|
{
|
|
|
|
|
pred = e->src->index;
|
|
|
|
|
succ = e->dest->index;
|
1999-09-23 17:07:26 +02:00
|
|
|
|
index = EDGE_INDEX (elist, e->src, e->dest);
|
1999-08-17 00:14:51 +02:00
|
|
|
|
if (index == EDGE_INDEX_NO_EDGE)
|
|
|
|
|
{
|
|
|
|
|
fprintf (f, "*p* No index for edge from %d to %d\n",pred, succ);
|
|
|
|
|
continue;
|
|
|
|
|
}
|
|
|
|
|
if (INDEX_EDGE_PRED_BB (elist, index)->index != pred)
|
|
|
|
|
fprintf (f, "*p* Pred for index %d should be %d not %d\n",
|
|
|
|
|
index, pred, INDEX_EDGE_PRED_BB (elist, index)->index);
|
|
|
|
|
if (INDEX_EDGE_SUCC_BB (elist, index)->index != succ)
|
|
|
|
|
fprintf (f, "*p* Succ for index %d should be %d not %d\n",
|
|
|
|
|
index, succ, INDEX_EDGE_SUCC_BB (elist, index)->index);
|
|
|
|
|
}
|
|
|
|
|
/* We've verified that all the edges are in the list, no lets make sure
|
|
|
|
|
there are no spurious edges in the list. */
|
|
|
|
|
|
|
|
|
|
for (pred = 0 ; pred < n_basic_blocks; pred++)
|
|
|
|
|
for (succ = 0 ; succ < n_basic_blocks; succ++)
|
|
|
|
|
{
|
|
|
|
|
basic_block p = BASIC_BLOCK (pred);
|
|
|
|
|
basic_block s = BASIC_BLOCK (succ);
|
|
|
|
|
|
|
|
|
|
int found_edge = 0;
|
|
|
|
|
|
|
|
|
|
for (e = p->succ; e; e = e->succ_next)
|
|
|
|
|
if (e->dest == s)
|
|
|
|
|
{
|
|
|
|
|
found_edge = 1;
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
for (e = s->pred; e; e = e->pred_next)
|
|
|
|
|
if (e->src == p)
|
|
|
|
|
{
|
|
|
|
|
found_edge = 1;
|
|
|
|
|
break;
|
|
|
|
|
}
|
1999-09-23 17:07:26 +02:00
|
|
|
|
if (EDGE_INDEX (elist, BASIC_BLOCK (pred), BASIC_BLOCK (succ))
|
|
|
|
|
== EDGE_INDEX_NO_EDGE && found_edge != 0)
|
1999-08-17 00:14:51 +02:00
|
|
|
|
fprintf (f, "*** Edge (%d, %d) appears to not have an index\n",
|
|
|
|
|
pred, succ);
|
1999-09-23 17:07:26 +02:00
|
|
|
|
if (EDGE_INDEX (elist, BASIC_BLOCK (pred), BASIC_BLOCK (succ))
|
|
|
|
|
!= EDGE_INDEX_NO_EDGE && found_edge == 0)
|
1999-08-17 00:14:51 +02:00
|
|
|
|
fprintf (f, "*** Edge (%d, %d) has index %d, but there is no edge\n",
|
1999-09-23 17:07:26 +02:00
|
|
|
|
pred, succ, EDGE_INDEX (elist, BASIC_BLOCK (pred),
|
|
|
|
|
BASIC_BLOCK (succ)));
|
1999-08-17 00:14:51 +02:00
|
|
|
|
}
|
|
|
|
|
for (succ = 0 ; succ < n_basic_blocks; succ++)
|
|
|
|
|
{
|
|
|
|
|
basic_block p = ENTRY_BLOCK_PTR;
|
|
|
|
|
basic_block s = BASIC_BLOCK (succ);
|
|
|
|
|
|
|
|
|
|
int found_edge = 0;
|
|
|
|
|
|
|
|
|
|
for (e = p->succ; e; e = e->succ_next)
|
|
|
|
|
if (e->dest == s)
|
|
|
|
|
{
|
|
|
|
|
found_edge = 1;
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
for (e = s->pred; e; e = e->pred_next)
|
|
|
|
|
if (e->src == p)
|
|
|
|
|
{
|
|
|
|
|
found_edge = 1;
|
|
|
|
|
break;
|
|
|
|
|
}
|
1999-09-23 17:07:26 +02:00
|
|
|
|
if (EDGE_INDEX (elist, ENTRY_BLOCK_PTR, BASIC_BLOCK (succ))
|
|
|
|
|
== EDGE_INDEX_NO_EDGE && found_edge != 0)
|
1999-08-17 00:14:51 +02:00
|
|
|
|
fprintf (f, "*** Edge (entry, %d) appears to not have an index\n",
|
|
|
|
|
succ);
|
1999-09-23 17:07:26 +02:00
|
|
|
|
if (EDGE_INDEX (elist, ENTRY_BLOCK_PTR, BASIC_BLOCK (succ))
|
|
|
|
|
!= EDGE_INDEX_NO_EDGE && found_edge == 0)
|
1999-08-17 00:14:51 +02:00
|
|
|
|
fprintf (f, "*** Edge (entry, %d) has index %d, but no edge exists\n",
|
1999-09-23 17:07:26 +02:00
|
|
|
|
succ, EDGE_INDEX (elist, ENTRY_BLOCK_PTR,
|
|
|
|
|
BASIC_BLOCK (succ)));
|
1999-08-17 00:14:51 +02:00
|
|
|
|
}
|
|
|
|
|
for (pred = 0 ; pred < n_basic_blocks; pred++)
|
|
|
|
|
{
|
|
|
|
|
basic_block p = BASIC_BLOCK (pred);
|
|
|
|
|
basic_block s = EXIT_BLOCK_PTR;
|
|
|
|
|
|
|
|
|
|
int found_edge = 0;
|
|
|
|
|
|
|
|
|
|
for (e = p->succ; e; e = e->succ_next)
|
|
|
|
|
if (e->dest == s)
|
|
|
|
|
{
|
|
|
|
|
found_edge = 1;
|
|
|
|
|
break;
|
|
|
|
|
}
|
|
|
|
|
for (e = s->pred; e; e = e->pred_next)
|
|
|
|
|
if (e->src == p)
|
|
|
|
|
{
|
|
|
|
|
found_edge = 1;
|
|
|
|
|
break;
|
|
|
|
|
}
|
1999-09-23 17:07:26 +02:00
|
|
|
|
if (EDGE_INDEX (elist, BASIC_BLOCK (pred), EXIT_BLOCK_PTR)
|
|
|
|
|
== EDGE_INDEX_NO_EDGE && found_edge != 0)
|
1999-08-17 00:14:51 +02:00
|
|
|
|
fprintf (f, "*** Edge (%d, exit) appears to not have an index\n",
|
|
|
|
|
pred);
|
1999-09-23 17:07:26 +02:00
|
|
|
|
if (EDGE_INDEX (elist, BASIC_BLOCK (pred), EXIT_BLOCK_PTR)
|
|
|
|
|
!= EDGE_INDEX_NO_EDGE && found_edge == 0)
|
1999-08-17 00:14:51 +02:00
|
|
|
|
fprintf (f, "*** Edge (%d, exit) has index %d, but no edge exists\n",
|
1999-09-23 17:07:26 +02:00
|
|
|
|
pred, EDGE_INDEX (elist, BASIC_BLOCK (pred),
|
|
|
|
|
EXIT_BLOCK_PTR));
|
1999-08-17 00:14:51 +02:00
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* This routine will determine what, if any, edge there is between
|
|
|
|
|
a specified predecessor and successor. */
|
|
|
|
|
|
|
|
|
|
int
|
|
|
|
|
find_edge_index (edge_list, pred, succ)
|
|
|
|
|
struct edge_list *edge_list;
|
1999-09-23 17:07:26 +02:00
|
|
|
|
basic_block pred, succ;
|
1999-08-17 00:14:51 +02:00
|
|
|
|
{
|
|
|
|
|
int x;
|
|
|
|
|
for (x = 0; x < NUM_EDGES (edge_list); x++)
|
|
|
|
|
{
|
1999-09-23 17:07:26 +02:00
|
|
|
|
if (INDEX_EDGE_PRED_BB (edge_list, x) == pred
|
|
|
|
|
&& INDEX_EDGE_SUCC_BB (edge_list, x) == succ)
|
1999-08-17 00:14:51 +02:00
|
|
|
|
return x;
|
|
|
|
|
}
|
|
|
|
|
return (EDGE_INDEX_NO_EDGE);
|
|
|
|
|
}
|
|
|
|
|
|
1999-09-21 20:54:34 +02:00
|
|
|
|
/* This function will remove an edge from the flow graph. */
|
|
|
|
|
static void
|
|
|
|
|
remove_edge (e)
|
|
|
|
|
edge e;
|
|
|
|
|
{
|
|
|
|
|
edge last_pred = NULL;
|
|
|
|
|
edge last_succ = NULL;
|
|
|
|
|
edge tmp;
|
|
|
|
|
basic_block src, dest;
|
|
|
|
|
src = e->src;
|
|
|
|
|
dest = e->dest;
|
|
|
|
|
for (tmp = src->succ; tmp && tmp != e; tmp = tmp->succ_next)
|
|
|
|
|
last_succ = tmp;
|
|
|
|
|
|
|
|
|
|
if (!tmp)
|
|
|
|
|
abort ();
|
|
|
|
|
if (last_succ)
|
|
|
|
|
last_succ->succ_next = e->succ_next;
|
|
|
|
|
else
|
|
|
|
|
src->succ = e->succ_next;
|
|
|
|
|
|
|
|
|
|
for (tmp = dest->pred; tmp && tmp != e; tmp = tmp->pred_next)
|
|
|
|
|
last_pred = tmp;
|
|
|
|
|
|
|
|
|
|
if (!tmp)
|
|
|
|
|
abort ();
|
|
|
|
|
if (last_pred)
|
|
|
|
|
last_pred->pred_next = e->pred_next;
|
|
|
|
|
else
|
|
|
|
|
dest->pred = e->pred_next;
|
|
|
|
|
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
n_edges--;
|
1999-09-21 20:54:34 +02:00
|
|
|
|
free (e);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* This routine will remove any fake successor edges for a basic block.
|
|
|
|
|
When the edge is removed, it is also removed from whatever predecessor
|
|
|
|
|
list it is in. */
|
|
|
|
|
static void
|
|
|
|
|
remove_fake_successors (bb)
|
|
|
|
|
basic_block bb;
|
|
|
|
|
{
|
|
|
|
|
edge e;
|
|
|
|
|
for (e = bb->succ; e ; )
|
|
|
|
|
{
|
|
|
|
|
edge tmp = e;
|
|
|
|
|
e = e->succ_next;
|
|
|
|
|
if ((tmp->flags & EDGE_FAKE) == EDGE_FAKE)
|
|
|
|
|
remove_edge (tmp);
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* This routine will remove all fake edges from the flow graph. If
|
|
|
|
|
we remove all fake successors, it will automatically remove all
|
|
|
|
|
fake predecessors. */
|
|
|
|
|
void
|
|
|
|
|
remove_fake_edges ()
|
|
|
|
|
{
|
|
|
|
|
int x;
|
|
|
|
|
|
|
|
|
|
for (x = 0; x < n_basic_blocks; x++)
|
Makefile.in (flow.o): Depend on TREE_H.
* Makefile.in (flow.o): Depend on TREE_H.
* basic-block.h (REG_SET_EQUAL_P): New.
(XOR_REG_SET): New.
(n_edges): Declare.
(free_regset_vector): Remove declaration.
(flow_delete_insn_chain): Declare.
(enum update_life_extent): New.
(update_life_info, count_or_remove_death_notes): Declare.
* combine.c (distribute_notes) [REG_DEAD]: Stop search at bb->head.
Verify register live at bb->global_live_at_start before adding USE.
* flow.c (HAVE_epilogue, HAVE_prologue): Provide default.
(CLEAN_ALLOCA): New.
(n_edges): New.
(PROP_*): New flags.
(find_basic_blocks_1): Use alloc_EXPR_LIST.
(clear_edges): Zero n_edges.
(make_edge): Increment n_edges.
(split_edge): Don't allocate bb->local_set. Increment n_edges.
(flow_delete_insn_chain): Export.
(delete_block): Decrement n_edges.
(merge_blocks_nomove): Likewise.
(life_analysis): Give life_analysis_1 PROP flags.
(verify_wide_reg_1, verify_wide_reg): New.
(verify_local_live_at_start): New.
(update_life_info): Rewrite to call into propogate_block.
(mark_reg): New.
(mark_regs_live_at_end): After reload, if epilogue as rtl,
always mark stack pointer. Conditionally mark PIC register.
After reload, mark call-saved registers, return regsiters.
(life_analysis_1): Accept PROP flags not remove_dead_code.
Call mark_regs_live_at_end before zeroing regs_ever_live.
Use calculate_global_regs_live. Copy global_live_at_end before
calling final propagate_block. Zero reg_next_use on exit.
(calculate_global_regs_live): New.
(allocate_bb_life_data): Don't allocate bb->local_set.
(init_regset_vector, free_regset_vector): Remove.
(propagate_block): Accept FLAGS not FINAL or REMOVE_DEAD_CODE.
Test flags before every operation. Warn if prologue/epilogue insn
would have been deleted.
(mark_set_regs, mark_set_1): Accept and use FLAGS.
Use alloc_EXPR_LIST.
(mark_used_regs): Accept and use FLAGS, not FINAL.
Remove special handling for RETURN.
(try_pre_increment): Use alloc_EXPR_LIST.
(dump_flow_info): Dump n_edges.
(unlink_insn_chain, split_hard_reg_notes): Remove.
(maybe_add_dead_note, maybe_add_dead_note_use): Remove.
(find_insn_with_note, new_insn_dead_notes): Remove.
(update_n_sets, sets_reg_or_subreg_1, sets_reg_or_subreg): Remove.
(maybe_remove_dead_notes, prepend_reg_notes): Remove.
(replace_insns): Remove.
(count_or_remove_death_notes): New.
(verify_flow_info): Abort on error after all checks.
(remove_edge): Decrement n_edges.
(remove_fake_edges): Tweek format.
* haifa-sched.c (schedule_insns): Use split_all_insns.
* output.h (update_life_info): Remove declaration.
* recog.c (split_all_insns): From the corpse of split_block_insns,
do the whole function block by block. Use update_life_info.
(recog_last_allowed_insn): New.
(recog_next_insn): Mind it.
(peephole2_optimize): Set it. Walk backwards through blocks.
Use update_life_info.
* rtl.h (update_flow_info, replace_insns): Remove declarations.
(split_all_insns): Declare.
* toplev.c (rest_of_compilation): Thread prologue before flow2.
Use split_all_insns.
* i386.md (or -1 peep2s): Disable.
From-SVN: r29877
1999-10-09 21:47:18 +02:00
|
|
|
|
remove_fake_successors (BASIC_BLOCK (x));
|
|
|
|
|
|
1999-09-22 17:44:57 +02:00
|
|
|
|
/* We've handled all successors except the entry block's. */
|
1999-09-21 20:54:34 +02:00
|
|
|
|
remove_fake_successors (ENTRY_BLOCK_PTR);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* This functions will add a fake edge between any block which has no
|
|
|
|
|
successors, and the exit block. Some data flow equations require these
|
|
|
|
|
edges to exist. */
|
|
|
|
|
void
|
1999-09-22 17:44:57 +02:00
|
|
|
|
add_noreturn_fake_exit_edges ()
|
1999-09-21 20:54:34 +02:00
|
|
|
|
{
|
|
|
|
|
int x;
|
|
|
|
|
|
|
|
|
|
for (x = 0; x < n_basic_blocks; x++)
|
|
|
|
|
if (BASIC_BLOCK (x)->succ == NULL)
|
1999-10-05 21:01:01 +02:00
|
|
|
|
make_edge (NULL, BASIC_BLOCK (x), EXIT_BLOCK_PTR, EDGE_FAKE);
|
1999-09-21 20:54:34 +02:00
|
|
|
|
}
|