diff options
| author | Richard Stallman <rms@gnu.org> | 1993-04-18 03:35:35 +0000 |
|---|---|---|
| committer | Richard Stallman <rms@gnu.org> | 1993-04-18 03:35:35 +0000 |
| commit | 06038f12649f917c9a4d936ebd725fec53962092 (patch) | |
| tree | d4ecbbc78c21d45b2cd261d7868d32cbe8e9f6f2 | |
| parent | 1815bfc25fbf311268c47ad1b19b1c0bbef7922d (diff) | |
| download | gcc-06038f12649f917c9a4d936ebd725fec53962092.zip gcc-06038f12649f917c9a4d936ebd725fec53962092.tar.gz gcc-06038f12649f917c9a4d936ebd725fec53962092.tar.bz2 | |
(finish_struct): Promote unsigned bitfield to signed int
if the field isn't as wide as an int.
From-SVN: r4178
| -rw-r--r-- | gcc/c-decl.c | 30 |
1 files changed, 17 insertions, 13 deletions
diff --git a/gcc/c-decl.c b/gcc/c-decl.c index fefce72..9efece4 100644 --- a/gcc/c-decl.c +++ b/gcc/c-decl.c @@ -5260,19 +5260,23 @@ finish_struct (t, fieldlist) /* Promote each bit-field's type to int if it is narrower than that. */ for (x = fieldlist; x; x = TREE_CHAIN (x)) if (DECL_BIT_FIELD (x) - && C_PROMOTING_INTEGER_TYPE_P (TREE_TYPE (x))) - { - tree type = TREE_TYPE (x); - - /* Preserve unsignedness if traditional or if not really any wider. */ - if (TREE_UNSIGNED (type) - && (flag_traditional - || (TYPE_PRECISION (type) - == TYPE_PRECISION (integer_type_node)))) - TREE_TYPE (x) = unsigned_type_node; - else - TREE_TYPE (x) = integer_type_node; - } + && (C_PROMOTING_INTEGER_TYPE_P (TREE_TYPE (x)) + || DECL_FIELD_SIZE (x) < TYPE_PRECISION (integer_type_node))) + { + tree type = TREE_TYPE (x); + + /* Preserve unsignedness if traditional + or if not really getting any wider. */ + if (TREE_UNSIGNED (type) + && (flag_traditional + || + (TYPE_PRECISION (type) == TYPE_PRECISION (integer_type_node) + && + DECL_FIELD_SIZE (x) == TYPE_PRECISION (integer_type_node)))) + TREE_TYPE (x) = unsigned_type_node; + else + TREE_TYPE (x) = integer_type_node; + } /* If this structure or union completes the type of any previous variable declaration, lay it out and output its rtl. */ |