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re PR rtl-optimization/44838 (RTL loop unrolling causes FAIL: gcc.dg/pr39794.c)

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2010-07-08  Richard Guenther  <rguenther@suse.de>

	PR rtl-optimization/44838
	* tree-ssa-alias.c (indirect_refs_may_alias_p): When not in
	SSA form do not use pointer equivalence.

From-SVN: r161945
This commit is contained in:
Richard Guenther 2010-07-08 09:09:15 +00:00 committed by Richard Biener
parent 51d49bc218
commit e73cfe5d34
2 changed files with 8 additions and 1 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2010-07-08 Richard Guenther <rguenther@suse.de>
PR rtl-optimization/44838
* tree-ssa-alias.c (indirect_refs_may_alias_p): When not in
SSA form do not use pointer equivalence.
2010-07-08 Eric Botcazou <ebotcazou@adacore.com>
* dwarf2out.c (AT_linkage_name): Delete.

3
gcc/tree-ssa-alias.c
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@ -801,7 +801,8 @@ indirect_refs_may_alias_p (tree ref1 ATTRIBUTE_UNUSED, tree base1,
/* If both bases are based on pointers they cannot alias if they may not
point to the same memory object or if they point to the same object
and the accesses do not overlap. */
if (operand_equal_p (ptr1, ptr2, 0))
if ((!cfun || gimple_in_ssa_p (cfun))
&& operand_equal_p (ptr1, ptr2, 0))
{
if (TREE_CODE (base1) == MEM_REF)
offset1 += mem_ref_offset (base1).low * BITS_PER_UNIT;