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re PR tree-optimization/42157 (ICE building stage 1 libgcc: SEGV in compare_access_positions) 

2010-01-07  Martin Jambor  <mjambor@suse.cz>

	PR tree-optimization/42157
	* tree-sra.c (compare_access_positions): Stabilize sort if both
	accesses have integer types, return zero immediately if they are the
	same.

From-SVN: r155689
This commit is contained in:
Martin Jambor 2010-01-07 11:38:25 +01:00 committed by Martin Jambor
parent 2a3c437d06
commit d05fe940b7
2 changed files with 11 additions and 2 deletions
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7
gcc/ChangeLog
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@ -1,3 +1,10 @@
2010-01-07 Martin Jambor <mjambor@suse.cz>
PR tree-optimization/42157
* tree-sra.c (compare_access_positions): Stabilize sort if both
accesses have integer types, return zero immediately if they are the
same.
2010-01-06 Richard Henderson <rth@redhat.com>
PR middle-end/41883

6
gcc/tree-sra.c
View File

@ -1110,8 +1110,10 @@ compare_access_positions (const void *a, const void *b)
if (f1->size == f2->size)
{
if (f1->type == f2->type)
return 0;
/* Put any non-aggregate type before any aggregate type. */
if (!is_gimple_reg_type (f1->type)
else if (!is_gimple_reg_type (f1->type)
&& is_gimple_reg_type (f2->type))
return 1;
else if (is_gimple_reg_type (f1->type)
@ -1131,7 +1133,7 @@ compare_access_positions (const void *a, const void *b)
/* Put the integral type with the bigger precision first. */
else if (INTEGRAL_TYPE_P (f1->type)
&& INTEGRAL_TYPE_P (f2->type))
return TYPE_PRECISION (f1->type) > TYPE_PRECISION (f2->type) ? -1 : 1;
return TYPE_PRECISION (f2->type) - TYPE_PRECISION (f1->type);
/* Put any integral type with non-full precision last. */
else if (INTEGRAL_TYPE_P (f1->type)
&& (TREE_INT_CST_LOW (TYPE_SIZE (f1->type))