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re PR bootstrap/41241 (bootstrap comparison failure)

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2009-09-03  Vladimir Makarov  <vmakarov@redhat.com>

	PR bootstrap/41241
	* ira.c (update_equiv_reg): Remove check on class likely spill.

From-SVN: r151388
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Vladimir Makarov 2009-09-03 18:33:25 +00:00 committed by Vladimir Makarov
parent 10e1bc0371
commit 691571d285
2 changed files with 6 additions and 13 deletions
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gcc/ChangeLog
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@ -1,3 +1,8 @@
2009-09-03 Vladimir Makarov <vmakarov@redhat.com>
PR bootstrap/41241
* ira.c (update_equiv_reg): Remove check on class likely spill.
2009-09-03 Jakub Jelinek <jakub@redhat.com>
PR debug/41236

14
gcc/ira.c
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@ -2384,21 +2384,9 @@ 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
|| (CLASS_LIKELY_SPILLED_P (reg_preferred_class (regno))
&& MEM_P (src) && ! reg_equiv[regno].is_arg_equivalence))
|| reg_equiv[regno].init_insns == const0_rtx)
{
/* This might be setting a SUBREG of a pseudo, a pseudo that is
also set somewhere else to a constant. */