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| author | Jeff Law <law@redhat.com> | 2016-12-01 23:40:57 -0700 |
|---|---|---|
| committer | Jeff Law <law@gcc.gnu.org> | 2016-12-01 23:40:57 -0700 |
| commit | b06496b1617ffcaec0e82fd4cca9eae5e0301cd5 (patch) | |
| tree | db4227fedc3e30224dcba3cad2e37c3e156c0c61 | |
| parent | f3adbf9e9355aff989bd5b0c6ba227cc01bf57ec (diff) | |
| download | gcc-b06496b1617ffcaec0e82fd4cca9eae5e0301cd5.zip gcc-b06496b1617ffcaec0e82fd4cca9eae5e0301cd5.tar.gz gcc-b06496b1617ffcaec0e82fd4cca9eae5e0301cd5.tar.bz2 | |
* tree-ssa-threadedge.c
(record_temporary_equivalences_from_stmts_at_dest): Avoid temporary
propagation of operands if there are no operands.
From-SVN: r243152
| -rw-r--r-- | gcc/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/tree-ssa-threadedge.c | 7 |
2 files changed, 10 insertions, 3 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index c3170c0..75881ee 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,9 @@ +2016-12-01 Jeff Law <law@redhat.com> + + * tree-ssa-threadedge.c + (record_temporary_equivalences_from_stmts_at_dest): Avoid temporary + propagation of operands if there are no operands. + 2016-12-02 Jakub Jelinek <jakub@redhat.com> PR tree-optimization/78586 diff --git a/gcc/tree-ssa-threadedge.c b/gcc/tree-ssa-threadedge.c index 534292c..3fdd59e 100644 --- a/gcc/tree-ssa-threadedge.c +++ b/gcc/tree-ssa-threadedge.c @@ -328,9 +328,10 @@ record_temporary_equivalences_from_stmts_at_dest (edge e, SSA_NAME_VALUE in addition to its own lattice. */ cached_lhs = gimple_fold_stmt_to_constant_1 (stmt, threadedge_valueize); - if (!cached_lhs - || (TREE_CODE (cached_lhs) != SSA_NAME - && !is_gimple_min_invariant (cached_lhs))) + if (NUM_SSA_OPERANDS (stmt, SSA_OP_ALL_USES) != 0 + && (!cached_lhs + || (TREE_CODE (cached_lhs) != SSA_NAME + && !is_gimple_min_invariant (cached_lhs)))) { /* We're going to temporarily copy propagate the operands and see if that allows us to simplify this statement. */ |