diff options
Diffstat (limited to 'gcc/c/c-parser.cc')
| -rw-r--r-- | gcc/c/c-parser.cc | 48 |
1 files changed, 42 insertions, 6 deletions
diff --git a/gcc/c/c-parser.cc b/gcc/c/c-parser.cc index 0c3e3e2..5119841 100644 --- a/gcc/c/c-parser.cc +++ b/gcc/c/c-parser.cc @@ -10547,15 +10547,31 @@ c_parser_unary_expression (c_parser *parser) c_parser_consume_token (parser); exp_loc = c_parser_peek_token (parser)->location; op = c_parser_cast_expression (parser, NULL); - - op = default_function_array_read_conversion (exp_loc, op); + if ((VAR_P (op.value) || TREE_CODE (op.value) == PARM_DECL) + && !DECL_READ_P (op.value) + && (VAR_P (op.value) ? warn_unused_but_set_variable + : warn_unused_but_set_parameter) > 1) + { + op = default_function_array_read_conversion (exp_loc, op); + DECL_READ_P (op.value) = 0; + } + else + op = default_function_array_read_conversion (exp_loc, op); return parser_build_unary_op (op_loc, PREINCREMENT_EXPR, op); case CPP_MINUS_MINUS: c_parser_consume_token (parser); exp_loc = c_parser_peek_token (parser)->location; op = c_parser_cast_expression (parser, NULL); - - op = default_function_array_read_conversion (exp_loc, op); + if ((VAR_P (op.value) || TREE_CODE (op.value) == PARM_DECL) + && !DECL_READ_P (op.value) + && (VAR_P (op.value) ? warn_unused_but_set_variable + : warn_unused_but_set_parameter) > 1) + { + op = default_function_array_read_conversion (exp_loc, op); + DECL_READ_P (op.value) = 0; + } + else + op = default_function_array_read_conversion (exp_loc, op); return parser_build_unary_op (op_loc, PREDECREMENT_EXPR, op); case CPP_AND: c_parser_consume_token (parser); @@ -13933,7 +13949,17 @@ c_parser_postfix_expression_after_primary (c_parser *parser, start = expr.get_start (); finish = c_parser_peek_token (parser)->get_finish (); c_parser_consume_token (parser); - expr = default_function_array_read_conversion (expr_loc, expr); + if ((VAR_P (expr.value) || TREE_CODE (expr.value) == PARM_DECL) + && !DECL_READ_P (expr.value) + && (VAR_P (expr.value) ? warn_unused_but_set_variable + : warn_unused_but_set_parameter) > 1 + && TREE_CODE (TREE_TYPE (expr.value)) != ARRAY_TYPE) + { + expr = default_function_array_read_conversion (expr_loc, expr); + DECL_READ_P (expr.value) = 0; + } + else + expr = default_function_array_read_conversion (expr_loc, expr); expr.value = build_unary_op (op_loc, POSTINCREMENT_EXPR, expr.value, false); set_c_expr_source_range (&expr, start, finish); @@ -13945,7 +13971,17 @@ c_parser_postfix_expression_after_primary (c_parser *parser, start = expr.get_start (); finish = c_parser_peek_token (parser)->get_finish (); c_parser_consume_token (parser); - expr = default_function_array_read_conversion (expr_loc, expr); + if ((VAR_P (expr.value) || TREE_CODE (expr.value) == PARM_DECL) + && !DECL_READ_P (expr.value) + && (VAR_P (expr.value) ? warn_unused_but_set_variable + : warn_unused_but_set_parameter) > 1 + && TREE_CODE (TREE_TYPE (expr.value)) != ARRAY_TYPE) + { + expr = default_function_array_read_conversion (expr_loc, expr); + DECL_READ_P (expr.value) = 0; + } + else + expr = default_function_array_read_conversion (expr_loc, expr); expr.value = build_unary_op (op_loc, POSTDECREMENT_EXPR, expr.value, false); set_c_expr_source_range (&expr, start, finish); |