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reg-stack.c (convert_regs_entry, [...]): Delete prototypes. 

* reg-stack.c (convert_regs_entry, convert_regs_exit,
	convert_regs_1, convert_regs_2, convert_regs): Delete prototypes.
	(reg_to_stack): Move to end of the file.  Initialize the per
	basic block information here, instead of...
	(convert_regs_entry): Here.
	(convert_regs): Change unused return type to void.

From-SVN: r100238
This commit is contained in:
Roger Sayle 2005-05-27 01:58:07 +00:00 committed by Roger Sayle
parent 6f43e0a201
commit 00b9ce5c19
2 changed files with 117 additions and 121 deletions
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9
gcc/ChangeLog
View File

@ -1,3 +1,12 @@
2005-05-26 Roger Sayle <roger@eyesopen.com>
* reg-stack.c (convert_regs_entry, convert_regs_exit,
convert_regs_1, convert_regs_2, convert_regs): Delete prototypes.
(reg_to_stack): Move to end of the file. Initialize the per
basic block information here, instead of...
(convert_regs_entry): Here.
(convert_regs): Change unused return type to void.
2005-05-27 Kazu Hirata <kazu@cs.umass.edu>
* c-pch.c, timevar.c, timevar.h, unwind-compat.c,

229
gcc/reg-stack.c
View File

@ -259,11 +259,6 @@ static bool subst_stack_regs_pat (rtx, stack, rtx);
static void subst_asm_stack_regs (rtx, stack);
static bool subst_stack_regs (rtx, stack);
static void change_stack (rtx, stack, stack, enum emit_where);
static int convert_regs_entry (void);
static void convert_regs_exit (void);
static int convert_regs_1 (FILE *, basic_block);
static int convert_regs_2 (FILE *, basic_block);
static int convert_regs (FILE *);
static void print_stack (FILE *, stack);
static rtx next_flags_user (rtx);
static bool compensate_edge (edge, FILE *);
@ -397,101 +392,6 @@ pop_stack (stack regstack, int regno)
}
}
}
/* Convert register usage from "flat" register file usage to a "stack
register file. FILE is the dump file, if used.
Construct a CFG and run life analysis. Then convert each insn one
by one. Run a last cleanup_cfg pass, if optimizing, to eliminate
code duplication created when the converter inserts pop insns on
the edges. */
bool
reg_to_stack (FILE *file)
{
basic_block bb;
int i;
int max_uid;
/* Clean up previous run. */
stack_regs_mentioned_data = 0;
/* See if there is something to do. Flow analysis is quite
expensive so we might save some compilation time. */
for (i = FIRST_STACK_REG; i <= LAST_STACK_REG; i++)
if (regs_ever_live[i])
break;
if (i > LAST_STACK_REG)
return false;
/* Ok, floating point instructions exist. If not optimizing,
build the CFG and run life analysis.
Also need to rebuild life when superblock scheduling is done
as it don't update liveness yet. */
if (!optimize
|| (flag_sched2_use_superblocks
&& flag_schedule_insns_after_reload))
{
count_or_remove_death_notes (NULL, 1);
life_analysis (file, PROP_DEATH_NOTES);
}
mark_dfs_back_edges ();
/* Set up block info for each basic block. */
alloc_aux_for_blocks (sizeof (struct block_info_def));
FOR_EACH_BB_REVERSE (bb)
{
edge e;
edge_iterator ei;
FOR_EACH_EDGE (e, ei, bb->preds)
if (!(e->flags & EDGE_DFS_BACK)
&& e->src != ENTRY_BLOCK_PTR)
BLOCK_INFO (bb)->predecessors++;
}
/* Create the replacement registers up front. */
for (i = FIRST_STACK_REG; i <= LAST_STACK_REG; i++)
{
enum machine_mode mode;
for (mode = GET_CLASS_NARROWEST_MODE (MODE_FLOAT);
mode != VOIDmode;
mode = GET_MODE_WIDER_MODE (mode))
FP_MODE_REG (i, mode) = gen_rtx_REG (mode, i);
for (mode = GET_CLASS_NARROWEST_MODE (MODE_COMPLEX_FLOAT);
mode != VOIDmode;
mode = GET_MODE_WIDER_MODE (mode))
FP_MODE_REG (i, mode) = gen_rtx_REG (mode, i);
}
ix86_flags_rtx = gen_rtx_REG (CCmode, FLAGS_REG);
/* A QNaN for initializing uninitialized variables.
??? We can't load from constant memory in PIC mode, because
we're inserting these instructions before the prologue and
the PIC register hasn't been set up. In that case, fall back
on zero, which we can get from `ldz'. */
if (flag_pic)
not_a_num = CONST0_RTX (SFmode);
else
{
not_a_num = gen_lowpart (SFmode, GEN_INT (0x7fc00000));
not_a_num = force_const_mem (SFmode, not_a_num);
}
/* Allocate a cache for stack_regs_mentioned. */
max_uid = get_max_uid ();
VARRAY_CHAR_INIT (stack_regs_mentioned_data, max_uid + 1,
"stack_regs_mentioned cache");
convert_regs (file);
free_aux_for_blocks ();
return true;
}
/* Return a pointer to the REG expression within PAT. If PAT is not a
REG, possible enclosed by a conversion rtx, return the inner part of
@ -2608,25 +2508,6 @@ convert_regs_entry (void)
int inserted = 0;
edge e;
edge_iterator ei;
basic_block block;
FOR_EACH_BB_REVERSE (block)
{
block_info bi = BLOCK_INFO (block);
int reg;
/* Set current register status at last instruction `uninitialized'. */
bi->stack_in.top = -2;
/* Copy live_at_end and live_at_start into temporaries. */
for (reg = FIRST_STACK_REG; reg <= LAST_STACK_REG; reg++)
{
if (REGNO_REG_SET_P (block->global_live_at_end, reg))
SET_HARD_REG_BIT (bi->out_reg_set, reg);
if (REGNO_REG_SET_P (block->global_live_at_start, reg))
SET_HARD_REG_BIT (bi->stack_in.reg_set, reg);
}
}
/* Load something into each stack register live at function entry.
Such live registers can be caused by uninitialized variables or
@ -3082,7 +2963,7 @@ convert_regs_2 (FILE *file, basic_block block)
references in each insn from the "flat" register file that gcc uses,
to the stack-like registers the 387 uses. */
static int
static void
convert_regs (FILE *file)
{
int inserted;
@ -3122,8 +3003,114 @@ convert_regs (FILE *file)
if (file)
fputc ('\n', file);
}
/* Convert register usage from "flat" register file usage to a "stack
register file. FILE is the dump file, if used.
return inserted;
Construct a CFG and run life analysis. Then convert each insn one
by one. Run a last cleanup_cfg pass, if optimizing, to eliminate
code duplication created when the converter inserts pop insns on
the edges. */
bool
reg_to_stack (FILE *file)
{
basic_block bb;
int i;
int max_uid;
/* Clean up previous run. */
stack_regs_mentioned_data = 0;
/* See if there is something to do. Flow analysis is quite
expensive so we might save some compilation time. */
for (i = FIRST_STACK_REG; i <= LAST_STACK_REG; i++)
if (regs_ever_live[i])
break;
if (i > LAST_STACK_REG)
return false;
/* Ok, floating point instructions exist. If not optimizing,
build the CFG and run life analysis.
Also need to rebuild life when superblock scheduling is done
as it don't update liveness yet. */
if (!optimize
|| (flag_sched2_use_superblocks
&& flag_schedule_insns_after_reload))
{
count_or_remove_death_notes (NULL, 1);
life_analysis (file, PROP_DEATH_NOTES);
}
mark_dfs_back_edges ();
/* Set up block info for each basic block. */
alloc_aux_for_blocks (sizeof (struct block_info_def));
FOR_EACH_BB_REVERSE (bb)
{
block_info bi = BLOCK_INFO (bb);
edge_iterator ei;
edge e;
int reg;
FOR_EACH_EDGE (e, ei, bb->preds)
if (!(e->flags & EDGE_DFS_BACK)
&& e->src != ENTRY_BLOCK_PTR)
bi->predecessors++;
/* Set current register status at last instruction `uninitialized'. */
bi->stack_in.top = -2;
/* Copy live_at_end and live_at_start into temporaries. */
for (reg = FIRST_STACK_REG; reg <= LAST_STACK_REG; reg++)
{
if (REGNO_REG_SET_P (bb->global_live_at_end, reg))
SET_HARD_REG_BIT (bi->out_reg_set, reg);
if (REGNO_REG_SET_P (bb->global_live_at_start, reg))
SET_HARD_REG_BIT (bi->stack_in.reg_set, reg);
}
}
/* Create the replacement registers up front. */
for (i = FIRST_STACK_REG; i <= LAST_STACK_REG; i++)
{
enum machine_mode mode;
for (mode = GET_CLASS_NARROWEST_MODE (MODE_FLOAT);
mode != VOIDmode;
mode = GET_MODE_WIDER_MODE (mode))
FP_MODE_REG (i, mode) = gen_rtx_REG (mode, i);
for (mode = GET_CLASS_NARROWEST_MODE (MODE_COMPLEX_FLOAT);
mode != VOIDmode;
mode = GET_MODE_WIDER_MODE (mode))
FP_MODE_REG (i, mode) = gen_rtx_REG (mode, i);
}
ix86_flags_rtx = gen_rtx_REG (CCmode, FLAGS_REG);
/* A QNaN for initializing uninitialized variables.
??? We can't load from constant memory in PIC mode, because
we're inserting these instructions before the prologue and
the PIC register hasn't been set up. In that case, fall back
on zero, which we can get from `ldz'. */
if (flag_pic)
not_a_num = CONST0_RTX (SFmode);
else
{
not_a_num = gen_lowpart (SFmode, GEN_INT (0x7fc00000));
not_a_num = force_const_mem (SFmode, not_a_num);
}
/* Allocate a cache for stack_regs_mentioned. */
max_uid = get_max_uid ();
VARRAY_CHAR_INIT (stack_regs_mentioned_data, max_uid + 1,
"stack_regs_mentioned cache");
convert_regs (file);
free_aux_for_blocks ();
return true;
}
#endif /* STACK_REGS */