diff options
| -rw-r--r-- | gcc/c-typeck.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/gcc/c-typeck.c b/gcc/c-typeck.c index d2abd729042..9960f119552 100644 --- a/gcc/c-typeck.c +++ b/gcc/c-typeck.c @@ -1010,6 +1010,24 @@ default_conversion (exp) return convert (type, exp); } + if (TREE_CODE (exp) == COMPONENT_REF + && DECL_BIT_FIELD (TREE_OPERAND (exp, 1))) + { + tree width = DECL_SIZE (TREE_OPERAND (exp, 1)); + HOST_WIDE_INT low = TREE_INT_CST_LOW (width); + + /* If it's thinner than an int, promote it like a + C_PROMOTING_INTEGER_TYPE_P, otherwise leave it alone. */ + + if (low < TYPE_PRECISION (integer_type_node)) + { + if ( flag_traditional && TREE_UNSIGNED (type)) + return convert (unsigned_type_node, exp); + else + return convert (integer_type_node, exp); + } + } + if (C_PROMOTING_INTEGER_TYPE_P (type)) { /* Traditionally, unsignedness is preserved in default promotions. |