diff options
Diffstat (limited to 'gcc/tree-ssa-sccvn.c')
-rw-r--r-- | gcc/tree-ssa-sccvn.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/gcc/tree-ssa-sccvn.c b/gcc/tree-ssa-sccvn.c index 5b0460d2bc6..cab2460a308 100644 --- a/gcc/tree-ssa-sccvn.c +++ b/gcc/tree-ssa-sccvn.c @@ -2455,7 +2455,8 @@ vn_reference_lookup_3 (ao_ref *ref, tree vuse, void *data_, (vuse, vr->set, vr->type, vr->operands, val); } /* For now handle clearing memory with partial defs. */ - else if (integer_zerop (gimple_call_arg (def_stmt, 1)) + else if (known_eq (ref->size, maxsize) + && integer_zerop (gimple_call_arg (def_stmt, 1)) && tree_to_poly_int64 (len).is_constant (&leni) && offset.is_constant (&offseti) && offset2.is_constant (&offset2i) @@ -2503,7 +2504,8 @@ vn_reference_lookup_3 (ao_ref *ref, tree vuse, void *data_, return vn_reference_lookup_or_insert_for_pieces (vuse, vr->set, vr->type, vr->operands, val); } - else if (maxsize.is_constant (&maxsizei) + else if (known_eq (ref->size, maxsize) + && maxsize.is_constant (&maxsizei) && maxsizei % BITS_PER_UNIT == 0 && offset.is_constant (&offseti) && offseti % BITS_PER_UNIT == 0 |