re PR rtl-optimization/3640 (small lost optimization of "x==0 || x==1")
PR opt/3640
* fold-const.c (fold): Optimize unsigned comparisons against
UINT_MAX (and similar unsigned constants).
From-SVN: r49096
This commit is contained in:
Roger Sayle
Richard Henderson
parent
11303d15ae
commit
d8086cbb53
115
gcc/ChangeLog
115
gcc/ChangeLog
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@ -1,8 +1,15 @@
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2002-01-22 Roger Sayle <roger@eyesopen.com>
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Richard Henderson <rth@redhat.com>
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PR opt/3640
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* fold-const.c (fold): Optimize unsigned comparisons against
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UINT_MAX (and similar unsigned constants).
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2002-01-22 Janis Johnson <janis187@us.ibm.com>
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* Makefile.in (loop.o): Depend on OPTABS_H.
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* loop.c (expand_builtin_prefetch): Check the prefetch operand
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against the predicate.
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* Makefile.in (loop.o): Depend on OPTABS_H.
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* loop.c (expand_builtin_prefetch): Check the prefetch operand
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against the predicate.
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PR target/5379
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* config/i386/i386.md (prefetch_sse): Specify "p" as a constraint
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@ -25,18 +32,18 @@
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2002-01-22 Aldy Hernandez <aldyh@redhat.com>
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* regrename.c (kill_value): Fix typo.
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* regrename.c (kill_value): Fix typo.
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2002-01-22 Aldy Hernandez <aldyh@redhat.com>
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* doc/tm.texi: Remove STARTING_FRAME_PHASE.
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* doc/tm.texi: Remove STARTING_FRAME_PHASE.
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* config/rs6000/rs6000.h: Same.
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* config/rs6000/rs6000.h: Same.
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* function.c (instantiate_virtual_regs): Remove
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STARTING_FRAME_PHASE.
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(assign_stack_local_1): Same.
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Calculate frame phase.
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* function.c (instantiate_virtual_regs): Remove
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STARTING_FRAME_PHASE.
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(assign_stack_local_1): Same.
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Calculate frame phase.
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2002-01-22 Nick Clifton <nickc@redhat.com>
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@ -276,15 +283,15 @@ Sun Jan 20 18:40:14 2002 Richard Kenner <kenner@vlsi1.ultra.nyu.edu>
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2002-01-18 Aldy Hernandez <aldyh@redhat.com>
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* doc/tm.texi (STARTING_FRAME_PHASE): Document.
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* doc/tm.texi (STARTING_FRAME_PHASE): Document.
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* function.c (assign_stack_local_1): Adjust x_frame_offset with
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STARTING_FRAME_PHASE.
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(STARTING_FRAME_PHASE): New.
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(instantiate_virtual_regs): Check saneness of
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STARTING_FRAME_PHASE.
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* function.c (assign_stack_local_1): Adjust x_frame_offset with
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STARTING_FRAME_PHASE.
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(STARTING_FRAME_PHASE): New.
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(instantiate_virtual_regs): Check saneness of
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STARTING_FRAME_PHASE.
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* config/rs6000/rs6000.h (STARTING_FRAME_PHASE): New.
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* config/rs6000/rs6000.h (STARTING_FRAME_PHASE): New.
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2002-01-19 Alexandre Oliva <aoliva@redhat.com>
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@ -327,11 +334,11 @@ Thu Jan 17 15:28:26 2002 Richard Kenner <kenner@vlsi1.ultra.nyu.edu>
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2002-01-17 Aldy Hernandez <aldyh@redhat.com>
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* config.gcc (cpu_type): Include altivec.h in powerpc
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extra_headers.
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Same for darwin.
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* config.gcc (cpu_type): Include altivec.h in powerpc
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extra_headers.
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Same for darwin.
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* config/rs6000/altivec.h: New.
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* config/rs6000/altivec.h: New.
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2002-01-17 David Edelsohn <edelsohn@gnu.org>
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@ -409,7 +416,7 @@ Thu Jan 17 15:28:26 2002 Richard Kenner <kenner@vlsi1.ultra.nyu.edu>
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2002-01-16 Jakub Jelinek <jakub@redhat.com>
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PR target/5309:
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* config/sparc/sparc.c (ultrasparc_adjust_cost): Handle TYPE_IDIV the
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* config/sparc/sparc.c (ultrasparc_adjust_cost): Handle TYPE_IDIV the
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same way as TYPE_IMUL.
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(ultrasparc_sched_reorder): Likewise.
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* config/sparc/sparc.md (type): Add comment to update
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@ -505,27 +512,27 @@ Wed Jan 16 17:54:22 CET 2002 Jan Hubicka <jh@suse.cz>
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2002-01-15 Aldy Hernandez <aldyh@redhat.com>
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* config/rs6000/rs6000.md (altivec_stvx): Add parallels to stvx.
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(altivec_lvsl): Change constraint to b.
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(altivec_lvsr): Same.
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(altivec_lvebx): Same.
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(altivec_lvehx): Same.
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(altivec_lvewx): Same.
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(altivec_lvxl): Same.
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(altivec_lvx): Same.
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(altivec_stvx): Add parallel.
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(altivec_stvxl): Same.
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(altivec_stvehx): Same.
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(altivec_stvebx): Same.
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(altivec_stvebx): Same.
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* config/rs6000/rs6000.md (altivec_stvx): Add parallels to stvx.
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(altivec_lvsl): Change constraint to b.
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(altivec_lvsr): Same.
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(altivec_lvebx): Same.
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(altivec_lvehx): Same.
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(altivec_lvewx): Same.
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(altivec_lvxl): Same.
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(altivec_lvx): Same.
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(altivec_stvx): Add parallel.
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(altivec_stvxl): Same.
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(altivec_stvehx): Same.
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(altivec_stvebx): Same.
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(altivec_stvebx): Same.
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2002-01-15 Aldy Hernandez <aldyh@redhat.com>
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* config.gcc: Change altivec.h to altivec-defs.h.
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* config.gcc: Change altivec.h to altivec-defs.h.
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* config/rs6000/altivec.h: Delete.
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* config/rs6000/altivec.h: Delete.
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* config/rs6000/altivec-defs.h: Add.
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* config/rs6000/altivec-defs.h: Add.
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2002-01-15 John David Anglin <dave@hiauly1.hia.nrc.ca>
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@ -903,24 +910,24 @@ Fri Jan 11 09:25:05 2002 Nicola Pero <n.pero@mi.flashnet.it>
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2002-01-10 Aldy Hernandez <aldyh@redhat.com>
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* config/rs6000/rs6000.c (altivec_init_builtins): Add support for
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lvebx, lvehx, lvewx, lvxl, lvx, stvx, stvebx, stvehx, stvewx,
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stvxl.
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(altivec_expand_builtin): Same.
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(altivec_expand_stv_builtin): New.
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* config/rs6000/rs6000.c (altivec_init_builtins): Add support for
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lvebx, lvehx, lvewx, lvxl, lvx, stvx, stvebx, stvehx, stvewx,
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stvxl.
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(altivec_expand_builtin): Same.
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(altivec_expand_stv_builtin): New.
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* config/rs6000/rs6000.h (rs6000_builtins): Same.
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* config/rs6000/rs6000.h (rs6000_builtins): Same.
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* config/rs6000/rs6000.md ("altivec_lvebx"): New.
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("altivec_lvehx"): New.
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("altivec_lvewx"): New.
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("altivec_lvxl"): New.
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("altivec_lvx"): New.
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("altivec_stvx"): New.
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("altivec_stvebx"): New.
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("altivec_stvehx"): New.
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("altivec_stvewx"): New.
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("altivec_stvxl"): New.
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* config/rs6000/rs6000.md ("altivec_lvebx"): New.
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("altivec_lvehx"): New.
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("altivec_lvewx"): New.
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("altivec_lvxl"): New.
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("altivec_lvx"): New.
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("altivec_stvx"): New.
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("altivec_stvebx"): New.
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("altivec_stvehx"): New.
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("altivec_stvewx"): New.
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("altivec_stvxl"): New.
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2002-01-10 Richard Henderson <rth@redhat.com>
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@ -1,6 +1,6 @@
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/* Fold a constant sub-tree into a single node for C-compiler
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Copyright (C) 1987, 1988, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
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1999, 2000, 2001 Free Software Foundation, Inc.
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1999, 2000, 2001, 2002 Free Software Foundation, Inc.
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This file is part of GCC.
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@ -6753,6 +6753,31 @@ fold (expr)
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default:
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break;
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}
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else if (TREE_UNSIGNED (TREE_TYPE (arg1))
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&& tree_int_cst_equal (TYPE_MAX_VALUE (TREE_TYPE (arg1)),
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arg1))
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switch (TREE_CODE (t))
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{
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case GT_EXPR:
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return omit_one_operand (type,
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convert (type, integer_zero_node),
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arg0);
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case GE_EXPR:
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TREE_SET_CODE (t, EQ_EXPR);
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break;
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case LE_EXPR:
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return omit_one_operand (type,
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convert (type, integer_one_node),
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arg0);
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case LT_EXPR:
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TREE_SET_CODE (t, NE_EXPR);
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break;
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default:
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break;
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}
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}
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}
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