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global.c (compute_regsets): Set frame_pointer_needed here.

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2008-06-30  Joey Ye  <joey.ye@intel.com>
	    H.J. Lu  <hongjiu.lu@intel.com>

	* global.c (compute_regsets): Set frame_pointer_needed here.

	* reload1.c (init_elim_table): Don't set frame_pointer_needed
	here.

Co-Authored-By: H.J. Lu <hongjiu.lu@intel.com>

From-SVN: r137275
This commit is contained in:
Joey Ye 2008-06-30 17:51:49 +00:00 committed by H.J. Lu
parent aad416fbb5
commit 38aa4d08b7
3 changed files with 22 additions and 15 deletions
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8
gcc/ChangeLog
View File

@ -1,3 +1,11 @@
2008-06-30 Joey Ye <joey.ye@intel.com>
H.J. Lu <hongjiu.lu@intel.com>
* global.c (compute_regsets): Set frame_pointer_needed here.
* reload1.c (init_elim_table): Don't set frame_pointer_needed
here.
2008-06-30 Aaron W. LaFramboise <aaronavay62@aaronwl.com>
* doc/install.texi (specific): Expand Windows build notes.

12
gcc/global.c
View File

@ -206,7 +206,9 @@ static void build_insn_chain (void);
This will normally be called with ELIM_SET as the file static
variable eliminable_regset, and NO_GLOBAL_SET as the file static
variable NO_GLOBAL_ALLOC_REGS. */
variable NO_GLOBAL_ALLOC_REGS.
It also initializes global flag frame_pointer_needed. */
static void
compute_regsets (HARD_REG_SET *elim_set,
@ -222,11 +224,19 @@ compute_regsets (HARD_REG_SET *elim_set,
static const struct {const int from, to; } eliminables[] = ELIMINABLE_REGS;
size_t i;
#endif
/* FIXME: If EXIT_IGNORE_STACK is set, we will not save and restore
sp for alloca. So we can't eliminate the frame pointer in that
case. At some point, we should improve this by emitting the
sp-adjusting insns for this case. */
int need_fp
= (! flag_omit_frame_pointer
|| (cfun->calls_alloca && EXIT_IGNORE_STACK)
|| crtl->accesses_prior_frames
|| FRAME_POINTER_REQUIRED);
frame_pointer_needed = need_fp;
max_regno = max_reg_num ();
compact_blocks ();

17
gcc/reload1.c
View File

@ -3695,7 +3695,9 @@ elimination_target_reg_p (rtx x)
return false;
}
/* Initialize the table of registers to eliminate. */
/* Initialize the table of registers to eliminate.
Pre-condition: global flag frame_pointer_needed has been set before
calling this function. */
static void
init_elim_table (void)
@ -3708,19 +3710,6 @@ init_elim_table (void)
if (!reg_eliminate)
reg_eliminate = XCNEWVEC (struct elim_table, NUM_ELIMINABLE_REGS);
/* Does this function require a frame pointer? */
frame_pointer_needed = (! flag_omit_frame_pointer
/* ?? If EXIT_IGNORE_STACK is set, we will not save
and restore sp for alloca. So we can't eliminate
the frame pointer in that case. At some point,
we should improve this by emitting the
sp-adjusting insns for this case. */
|| (cfun->calls_alloca
&& EXIT_IGNORE_STACK)
|| crtl->accesses_prior_frames
|| FRAME_POINTER_REQUIRED);
num_eliminable = 0;
#ifdef ELIMINABLE_REGS