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| author | Richard Kenner <kenner@gcc.gnu.org> | 1994-08-19 17:32:52 -0400 |
|---|---|---|
| committer | Richard Kenner <kenner@gcc.gnu.org> | 1994-08-19 17:32:52 -0400 |
| commit | ec83f2b3818ca1f7b8520e9c0577b719db92b952 (patch) | |
| tree | cb979a01513760d7aeb98040dc8b6d662f50a3e6 /gcc/c-common.c | |
| parent | adb230612706c2ae934ad2b5432078b0d8596655 (diff) | |
| download | gcc-ec83f2b3818ca1f7b8520e9c0577b719db92b952.zip gcc-ec83f2b3818ca1f7b8520e9c0577b719db92b952.tar.gz gcc-ec83f2b3818ca1f7b8520e9c0577b719db92b952.tar.bz2 | |
(decl_attribute): Handle "transparent_union" attribute.
From-SVN: r7947
Diffstat (limited to 'gcc/c-common.c')
| -rw-r--r-- | gcc/c-common.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/gcc/c-common.c b/gcc/c-common.c index f18c270..8109fc0 100644 --- a/gcc/c-common.c +++ b/gcc/c-common.c @@ -253,6 +253,19 @@ decl_attributes (decl, attributes) else warning_with_decl (decl, "`const' attribute ignored"); } + else if (TREE_VALUE (a) == get_identifier ("transparent_union")) + { + if (TREE_CODE (decl) == PARM_DECL + && TREE_CODE (type) == UNION_TYPE + && TYPE_MODE (type) == DECL_MODE (TYPE_FIELDS (type))) + DECL_TRANSPARENT_UNION (decl) = 1; + else if (TREE_CODE (decl) == TYPE_DECL + && TREE_CODE (type) == UNION_TYPE + && TYPE_MODE (type) == DECL_MODE (TYPE_FIELDS (type))) + TYPE_TRANSPARENT_UNION (type) = 1; + else + warning_with_decl (decl, "`transparent_union' attribute ignored"); + } else if (TREE_CODE (name) != TREE_LIST) { #ifdef VALID_MACHINE_ATTRIBUTE |