diff options
Diffstat (limited to 'gcc/cp/cp-gimplify.cc')
| -rw-r--r-- | gcc/cp/cp-gimplify.cc | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/gcc/cp/cp-gimplify.cc b/gcc/cp/cp-gimplify.cc index 882a943..4ff8f36a 100644 --- a/gcc/cp/cp-gimplify.cc +++ b/gcc/cp/cp-gimplify.cc @@ -690,6 +690,7 @@ cp_gimplify_expr (tree *expr_p, gimple_seq *pre_p, gimple_seq *post_p) && (REFERENCE_CLASS_P (op1) || DECL_P (op1))) op1 = build_fold_addr_expr (op1); + suppress_warning (op1, OPT_Wunused_result); gimplify_and_add (op1, pre_p); } gimplify_expr (&TREE_OPERAND (*expr_p, 0), pre_p, post_p, @@ -3028,7 +3029,7 @@ cp_fold (tree x, fold_flags_t flags) case CLEANUP_POINT_EXPR: /* Strip CLEANUP_POINT_EXPR if the expression doesn't have side effects. */ - r = cp_fold_rvalue (TREE_OPERAND (x, 0), flags); + r = cp_fold (TREE_OPERAND (x, 0), flags); if (!TREE_SIDE_EFFECTS (r)) x = r; break; @@ -3217,7 +3218,16 @@ cp_fold (tree x, fold_flags_t flags) loc = EXPR_LOCATION (x); op0 = cp_fold_maybe_rvalue (TREE_OPERAND (x, 0), rval_ops, flags); - op1 = cp_fold_rvalue (TREE_OPERAND (x, 1), flags); + bool clear_decl_read; + clear_decl_read = false; + if (code == MODIFY_EXPR + && (VAR_P (op0) || TREE_CODE (op0) == PARM_DECL) + && !DECL_READ_P (op0)) + clear_decl_read = true; + op1 = cp_fold_maybe_rvalue (TREE_OPERAND (x, 1), + code != COMPOUND_EXPR, flags); + if (clear_decl_read) + DECL_READ_P (op0) = 0; /* decltype(nullptr) has only one value, so optimize away all comparisons with that type right away, keeping them in the IL causes troubles for |