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| author | Richard Biener <rguenther@suse.de> | 2015-01-29 13:50:37 +0000 |
|---|---|---|
| committer | Richard Biener <rguenth@gcc.gnu.org> | 2015-01-29 13:50:37 +0000 |
| commit | d94e3e750d1e5c2fc9ecc8e8a32adec33fc85f8e (patch) | |
| tree | 9bc44a875566081bd8465765ea38024d21452464 /gcc/tree-ssa-ccp.c | |
| parent | 16277100d305948fa6d6fb5a4a318d9728c2400f (diff) | |
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re PR tree-optimization/64853 (wrong code at -Os and above on x86_64-linux-gnu)
2015-01-29 Richard Biener <rguenther@suse.de>
PR tree-optimization/64853
* tree-vrp.c (vrp_valueize_1): Do not return anything if the
stmt will get simulated again.
* tree-ssa-ccp.c (valueize_op_1): Likewise.
* gcc.dg/torture/pr64853.c: New testcase.
From-SVN: r220247
Diffstat (limited to 'gcc/tree-ssa-ccp.c')
| -rw-r--r-- | gcc/tree-ssa-ccp.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/gcc/tree-ssa-ccp.c b/gcc/tree-ssa-ccp.c index 43336fa..a576bd1 100644 --- a/gcc/tree-ssa-ccp.c +++ b/gcc/tree-ssa-ccp.c @@ -1141,15 +1141,15 @@ valueize_op_1 (tree op) { if (TREE_CODE (op) == SSA_NAME) { - tree tem = get_constant_value (op); - if (tem) - return tem; /* If the definition may be simulated again we cannot follow this SSA edge as the SSA propagator does not necessarily re-visit the use. */ gimple def_stmt = SSA_NAME_DEF_STMT (op); if (prop_simulate_again_p (def_stmt)) return NULL_TREE; + tree tem = get_constant_value (op); + if (tem) + return tem; } return op; } |