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Diffstat (limited to 'gcc/tree-ssa-sccvn.c')
| -rw-r--r-- | gcc/tree-ssa-sccvn.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/gcc/tree-ssa-sccvn.c b/gcc/tree-ssa-sccvn.c index 8a5b641..e61e033 100644 --- a/gcc/tree-ssa-sccvn.c +++ b/gcc/tree-ssa-sccvn.c @@ -2152,6 +2152,12 @@ vn_reference_lookup_3 (ao_ref *ref, tree vuse, void *vr_, vr->operands[1] = op; vr->hashcode = vn_reference_compute_hash (vr); + /* Try folding the new reference to a constant. */ + tree val = fully_constant_vn_reference_p (vr); + if (val) + return vn_reference_lookup_or_insert_for_pieces + (vuse, vr->set, vr->type, vr->operands, val); + /* Adjust *ref from the new operands. */ if (!ao_ref_init_from_vn_reference (&r, vr->set, vr->type, vr->operands)) return (void *)-1; |