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| author | Richard Biener <rguenther@suse.de> | 2016-02-16 15:00:45 +0000 |
|---|---|---|
| committer | Richard Biener <rguenth@gcc.gnu.org> | 2016-02-16 15:00:45 +0000 |
| commit | 87440c298eb2ed47166b8d57a4afc90d310f3a8f (patch) | |
| tree | 8d0e66b862f18cc6aaa9eaf860c087a6377e9e42 /gcc/tree-ssa-sccvn.c | |
| parent | 6d87c306c6a44f8db81a9a9f2f5de4d943d5e57f (diff) | |
| download | gcc-87440c298eb2ed47166b8d57a4afc90d310f3a8f.zip gcc-87440c298eb2ed47166b8d57a4afc90d310f3a8f.tar.gz gcc-87440c298eb2ed47166b8d57a4afc90d310f3a8f.tar.bz2 | |
re PR tree-optimization/69776 (Wrong optimization with aliasing)
2016-02-16 Richard Biener <rguenther@suse.de>
PR tree-optimization/69776
* tree-ssa-alias.c (indirect_ref_may_alias_decl_p): Get alias
sets from caller.
(indirect_refs_may_alias_p): Likewise.
(refs_may_alias_p_1): Pass alias sets as from ao_ref.
* tree-ssa-sccvn.c (vn_reference_lookup): Also adjust vr alias-set
according to tbaa_p.
* tree-ssa-dom.c (lookup_avail_expr): Add tbaa_p flag.
(optimize_stmt): For redundant store discovery do not allow tbaa.
* gcc.dg/torture/pr69776-2.c: New testcase.
From-SVN: r233453
Diffstat (limited to 'gcc/tree-ssa-sccvn.c')
| -rw-r--r-- | gcc/tree-ssa-sccvn.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/gcc/tree-ssa-sccvn.c b/gcc/tree-ssa-sccvn.c index 5b78ba4..1c237a4 100644 --- a/gcc/tree-ssa-sccvn.c +++ b/gcc/tree-ssa-sccvn.c @@ -2249,7 +2249,7 @@ vn_reference_lookup (tree op, tree vuse, vn_lookup_kind kind, vr1.operands = operands = valueize_shared_reference_ops_from_ref (op, &valuezied_anything); vr1.type = TREE_TYPE (op); - vr1.set = get_alias_set (op); + vr1.set = tbaa_p ? get_alias_set (op) : 0; vr1.hashcode = vn_reference_compute_hash (&vr1); if ((cst = fully_constant_vn_reference_p (&vr1))) return cst; |