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alias.c (alias_set_subset_of): Correctly handle asking if zero is a subset of an...
authorRichard Guenther <rguenther@suse.de>
Wed, 23 Apr 2008 14:06:02 +0000 (14:06 +0000)
committerRichard Biener <rguenth@gcc.gnu.org>
Wed, 23 Apr 2008 14:06:02 +0000 (14:06 +0000)
commita7a512beff448f28fc2f9f192e19e30cbf971eba
tree92b446ae6c5a7e1732e139eb7761d3c20bb21399tree
parentf3f75f693d12f58acbb37d393280081621eb3f58commit | diff
alias.c (alias_set_subset_of): Correctly handle asking if zero is a subset of an alias set with zero child.

2008-04-23  Richard Guenther  <rguenther@suse.de>

* alias.c (alias_set_subset_of): Correctly handle asking
if zero is a subset of an alias set with zero child.
* tree-ssa-alias.c (have_common_aliases_p): Simplify logic.
(compute_flow_insensitive_aliasing): Correctly walk all
pointers.  Do not unnecessarily union sets.

From-SVN: r134597
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