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re PR rtl-optimization/25115 (Segmentation fault in pre_insert_copy_insn) 

2005-12-20  Roger Sayle  <roger@eyesopen.com>
	    Paolo Bonzini  <bonzini@gnu.org>

	PR rtl-optimization/25115
	* gcse.c (pre_insert_copy_insn): Fall back to the sole
	SET in the insn if there is no SET for an
	expression that is equivalent to EXPR.


Co-Authored-By: Paolo Bonzini <bonzini@gnu.org>

From-SVN: r108855
This commit is contained in:
Roger Sayle 2005-12-20 17:06:14 +00:00 committed by Paolo Bonzini
parent f5a7da0f62
commit 64068ca2f1
2 changed files with 25 additions and 5 deletions
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8
gcc/ChangeLog
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@ -1,3 +1,11 @@
2005-12-20 Roger Sayle <roger@eyesopen.com>
Paolo Bonzini <bonzini@gnu.org>
PR rtl-optimization/25115
* gcse.c (pre_insert_copy_insn): Fall back to the sole
SET in the insn if there is no SET for an
expression that is equivalent to EXPR.
2005-12-20 Richard Guenther <rguenther@suse.de>
PR middle-end/24306

22
gcc/gcse.c
View File

@ -4219,7 +4219,7 @@ pre_insert_copy_insn (struct expr *expr, rtx insn)
int regno = REGNO (reg);
int indx = expr->bitmap_index;
rtx pat = PATTERN (insn);
rtx set, new_insn;
rtx set, first_set, new_insn;
rtx old_reg;
int i;
@ -4233,17 +4233,29 @@ pre_insert_copy_insn (struct expr *expr, rtx insn)
case PARALLEL:
/* Search through the parallel looking for the set whose
source was the expression that we're interested in. */
first_set = NULL_RTX;
set = NULL_RTX;
for (i = 0; i < XVECLEN (pat, 0); i++)
{
rtx x = XVECEXP (pat, 0, i);
if (GET_CODE (x) == SET
&& expr_equiv_p (SET_SRC (x), expr->expr))
if (GET_CODE (x) == SET)
{
set = x;
break;
/* If the source was a REG_EQUAL or REG_EQUIV note, we
may not find an equivalent expression, but in this
case the PARALLEL will have a single set. */
if (first_set == NULL_RTX)
first_set = x;
if (expr_equiv_p (SET_SRC (x), expr->expr))
{
set = x;
break;
}
}
}
gcc_assert (first_set);
if (set == NULL_RTX)
set = first_set;
break;
default: