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| author | Richard Kenner <kenner@gcc.gnu.org> | 1996-07-03 17:34:57 -0400 |
|---|---|---|
| committer | Richard Kenner <kenner@gcc.gnu.org> | 1996-07-03 17:34:57 -0400 |
| commit | 9753f1136864a98cca12ab71f0ffe1af4dd84486 (patch) | |
| tree | 3aaa13afd22e76d95ea2fc4fa9591888538ed6f9 /gcc | |
| parent | 4689ad58a187bc99c5cc2299fdd07bcd3363f09b (diff) | |
| download | gcc-9753f1136864a98cca12ab71f0ffe1af4dd84486.zip gcc-9753f1136864a98cca12ab71f0ffe1af4dd84486.tar.gz gcc-9753f1136864a98cca12ab71f0ffe1af4dd84486.tar.bz2 | |
(default_conversion): Add bitfield promotions.
From-SVN: r12389
Diffstat (limited to 'gcc')
| -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 d2abd72..9960f11 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. |