diff options
Diffstat (limited to 'gcc/tree-if-conv.c')
| -rw-r--r-- | gcc/tree-if-conv.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/gcc/tree-if-conv.c b/gcc/tree-if-conv.c index 36a879d..98962c2 100644 --- a/gcc/tree-if-conv.c +++ b/gcc/tree-if-conv.c @@ -1407,7 +1407,8 @@ is_cond_scalar_reduction (gimple phi, gimple *reduc, gimple stmt; gimple header_phi = NULL; enum tree_code reduction_op; - struct loop *loop = gimple_bb (phi)->loop_father; + basic_block bb = gimple_bb (phi); + struct loop *loop = bb->loop_father; edge latch_e = loop_latch_edge (loop); imm_use_iterator imm_iter; use_operand_p use_p; @@ -1447,6 +1448,11 @@ is_cond_scalar_reduction (gimple phi, gimple *reduc, if (!is_predicated (gimple_bb (stmt))) return false; + /* Check that stmt-block is predecessor of phi-block. */ + if (EDGE_PRED (bb, 0)->src != gimple_bb (stmt) + && EDGE_PRED (bb, 1)->src != gimple_bb (stmt)) + return false; + if (!has_single_use (lhs)) return false; |