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Diffstat (limited to 'gcc/tree-ssa-sccvn.c')
| -rw-r--r-- | gcc/tree-ssa-sccvn.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/gcc/tree-ssa-sccvn.c b/gcc/tree-ssa-sccvn.c index 22dd801..2cc76d8 100644 --- a/gcc/tree-ssa-sccvn.c +++ b/gcc/tree-ssa-sccvn.c @@ -1996,7 +1996,8 @@ vn_reference_lookup_3 (ao_ref *ref, tree vuse, void *data_, activation of a union member via a store makes the values of untouched bytes unspecified. */ && (known_eq (ref->size, BITS_PER_UNIT) - || (get_alias_set (lhs) != 0 + || (flag_strict_aliasing + && get_alias_set (lhs) != 0 && ao_ref_alias_set (ref) != 0))) { tree *saved_last_vuse_ptr = data->last_vuse_ptr; |