diff options
Diffstat (limited to 'gcc/gimplify.c')
| -rw-r--r-- | gcc/gimplify.c | 27 |
1 files changed, 17 insertions, 10 deletions
diff --git a/gcc/gimplify.c b/gcc/gimplify.c index d1ce6d3dce8..03e2ca622cb 100644 --- a/gcc/gimplify.c +++ b/gcc/gimplify.c @@ -6787,17 +6787,24 @@ gimplify_expr (tree *expr_p, gimple_seq *pre_p, gimple_seq *post_p, case TRUTH_NOT_EXPR: { - tree orig_type = TREE_TYPE (*expr_p); + tree type = TREE_TYPE (*expr_p); + /* The parsers are careful to generate TRUTH_NOT_EXPR + only with operands that are always zero or one. + We do not fold here but handle the only interesting case + manually, as fold may re-introduce the TRUTH_NOT_EXPR. */ *expr_p = gimple_boolify (*expr_p); - if (!useless_type_conversion_p (orig_type, TREE_TYPE (*expr_p))) - { - *expr_p = fold_convert_loc (saved_location, orig_type, *expr_p); - ret = GS_OK; - break; - } - ret = gimplify_expr (&TREE_OPERAND (*expr_p, 0), pre_p, post_p, - is_gimple_val, fb_rvalue); - recalculate_side_effects (*expr_p); + if (TYPE_PRECISION (TREE_TYPE (*expr_p)) == 1) + *expr_p = build1_loc (input_location, BIT_NOT_EXPR, + TREE_TYPE (*expr_p), + TREE_OPERAND (*expr_p, 0)); + else + *expr_p = build2_loc (input_location, BIT_XOR_EXPR, + TREE_TYPE (*expr_p), + TREE_OPERAND (*expr_p, 0), + build_int_cst (TREE_TYPE (*expr_p), 1)); + if (!useless_type_conversion_p (type, TREE_TYPE (*expr_p))) + *expr_p = fold_convert_loc (input_location, type, *expr_p); + ret = GS_OK; break; } |
