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re PR bootstrap/41241 (bootstrap comparison failure) 

2009-09-04  Vladimir Makarov  <vmakarov@redhat.com>

	PR bootstrap/41241
	* ira.c (update_equiv_reg): Revert my previous patch for the PR.
	* reginfo.c (resize_reg_info): Call allocate_reg_info if necessary.
	(reginfo_init): Don't call allocate_reg_info.

From-SVN: r151440
This commit is contained in:
Vladimir Makarov 2009-09-04 19:36:26 +00:00 committed by Vladimir Makarov
parent 14e58be032
commit 1fe281160d
3 changed files with 27 additions and 4 deletions
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7
gcc/ChangeLog
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@ -1,3 +1,10 @@
2009-09-04 Vladimir Makarov <vmakarov@redhat.com>
PR bootstrap/41241
* ira.c (update_equiv_reg): Revert my previous patch for the PR.
* reginfo.c (resize_reg_info): Call allocate_reg_info if necessary.
(reginfo_init): Don't call allocate_reg_info.
2009-09-04 Uros Bizjak <ubizjak@gmail.com>
PR target/41262

14
gcc/ira.c
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@ -2384,9 +2384,21 @@ update_equiv_regs (void)
/* We only handle the case of a pseudo register being set
once, or always to the same value. */
/* ??? The mn10200 port breaks if we add equivalences for
values that need an ADDRESS_REGS register and set them equivalent
to a MEM of a pseudo. The actual problem is in the over-conservative
handling of INPADDR_ADDRESS / INPUT_ADDRESS / INPUT triples in
calculate_needs, but we traditionally work around this problem
here by rejecting equivalences when the destination is in a register
that's likely spilled. This is fragile, of course, since the
preferred class of a pseudo depends on all instructions that set
or use it. */
if (!REG_P (dest)
|| (regno = REGNO (dest)) < FIRST_PSEUDO_REGISTER
|| reg_equiv[regno].init_insns == const0_rtx)
|| reg_equiv[regno].init_insns == const0_rtx
|| (CLASS_LIKELY_SPILLED_P (reg_preferred_class (regno))
&& MEM_P (src) && ! reg_equiv[regno].is_arg_equivalence))
{
/* This might be setting a SUBREG of a pseudo, a pseudo that is
also set somewhere else to a constant. */

10
gcc/reginfo.c
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@ -952,13 +952,18 @@ allocate_reg_info (void)
}
/* Resize reg info. The new elements will be uninitialized. */
/* Resize reg info. The new elements will be uninitialized. Return
TRUE if new elements (for new pseudos) were added. */
bool
resize_reg_info (void)
{
int old;
gcc_assert (reg_pref != NULL);
if (reg_pref == NULL)
{
allocate_reg_info ();
return true;
}
if (reg_info_size == max_reg_num ())
return false;
old = reg_info_size;
@ -1000,7 +1005,6 @@ reginfo_init (void)
/* This prevents dump_flow_info from losing if called
before reginfo is run. */
reg_pref = NULL;
allocate_reg_info ();
/* No more global register variables may be declared. */
no_global_reg_vars = 1;
return 1;