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Diffstat (limited to 'gcc/tree-predcom.c')
| -rw-r--r-- | gcc/tree-predcom.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/gcc/tree-predcom.c b/gcc/tree-predcom.c index 1566902e3d7..61a1c741d1c 100644 --- a/gcc/tree-predcom.c +++ b/gcc/tree-predcom.c @@ -2117,7 +2117,11 @@ combinable_refs_p (dref r1, dref r2, stmt = find_common_use_stmt (&name1, &name2); - if (!stmt) + if (!stmt + /* A simple post-dominance check - make sure the combination + is executed under the same condition as the references. */ + || (gimple_bb (stmt) != gimple_bb (r1->stmt) + && gimple_bb (stmt) != gimple_bb (r2->stmt))) return false; acode = gimple_assign_rhs_code (stmt); |