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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 03fea751feb..6d263ded177 100644 --- a/gcc/tree-ssa-sccvn.c +++ b/gcc/tree-ssa-sccvn.c @@ -1976,6 +1976,12 @@ visit_reference_op_load (tree lhs, tree op, gimple stmt) bool changed = false; tree result = vn_reference_lookup (op, gimple_vuse (stmt), true, NULL); + /* If we have a VCE, try looking up its operand as it might be stored in + a different type. */ + if (!result && TREE_CODE (op) == VIEW_CONVERT_EXPR) + result = vn_reference_lookup (TREE_OPERAND (op, 0), gimple_vuse (stmt), + true, NULL); + /* We handle type-punning through unions by value-numbering based on offset and size of the access. Be prepared to handle a type-mismatch here via creating a VIEW_CONVERT_EXPR. */ |