diff options
Diffstat (limited to 'gcc/gimple-fold.cc')
| -rw-r--r-- | gcc/gimple-fold.cc | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/gcc/gimple-fold.cc b/gcc/gimple-fold.cc index fd52b58..f801e8b 100644 --- a/gcc/gimple-fold.cc +++ b/gcc/gimple-fold.cc @@ -6246,8 +6246,16 @@ replace_stmt_with_simplification (gimple_stmt_iterator *gsi, false, NULL_TREE))) gimple_cond_set_condition (cond_stmt, code, ops[0], ops[1]); else if (code == SSA_NAME) - gimple_cond_set_condition (cond_stmt, NE_EXPR, ops[0], - build_zero_cst (TREE_TYPE (ops[0]))); + { + /* If setting the gimple cond to the same thing, + return false as nothing changed. */ + if (gimple_cond_code (cond_stmt) == NE_EXPR + && operand_equal_p (gimple_cond_lhs (cond_stmt), ops[0]) + && integer_zerop (gimple_cond_rhs (cond_stmt))) + return false; + gimple_cond_set_condition (cond_stmt, NE_EXPR, ops[0], + build_zero_cst (TREE_TYPE (ops[0]))); + } else if (code == INTEGER_CST) { if (integer_zerop (ops[0])) |