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| author | Richard Guenther <rguenther@suse.de> | 2008-04-23 14:06:02 +0000 |
|---|---|---|
| committer | Richard Biener <rguenth@gcc.gnu.org> | 2008-04-23 14:06:02 +0000 |
| commit | a7a512beff448f28fc2f9f192e19e30cbf971eba (patch) | |
| tree | 92b446ae6c5a7e1732e139eb7761d3c20bb21399 /gcc/alias.c | |
| parent | f3f75f693d12f58acbb37d393280081621eb3f58 (diff) | |
| download | gcc-a7a512beff448f28fc2f9f192e19e30cbf971eba.zip gcc-a7a512beff448f28fc2f9f192e19e30cbf971eba.tar.gz gcc-a7a512beff448f28fc2f9f192e19e30cbf971eba.tar.bz2 | |
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
Diffstat (limited to 'gcc/alias.c')
| -rw-r--r-- | gcc/alias.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/gcc/alias.c b/gcc/alias.c index 2e4f5ae..7b14f26 100644 --- a/gcc/alias.c +++ b/gcc/alias.c @@ -305,8 +305,9 @@ alias_set_subset_of (alias_set_type set1, alias_set_type set2) /* Otherwise, check if set1 is a subset of set2. */ ase = get_alias_set_entry (set2); if (ase != 0 - && (splay_tree_lookup (ase->children, - (splay_tree_key) set1))) + && ((ase->has_zero_child && set1 == 0) + || splay_tree_lookup (ase->children, + (splay_tree_key) set1))) return true; return false; } |