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| author | Richard Kenner <kenner@gcc.gnu.org> | 1996-04-26 06:38:48 -0400 |
|---|---|---|
| committer | Richard Kenner <kenner@gcc.gnu.org> | 1996-04-26 06:38:48 -0400 |
| commit | 977a7752c7617d388cf14b72606e36fa5ddcc6f7 (patch) | |
| tree | 496cf2a0d79b51de615aceb2c94c18cb8c9beeae | |
| parent | 46d4a027e75d9d5dbafcf6132c9986e9b601cd80 (diff) | |
| download | gcc-977a7752c7617d388cf14b72606e36fa5ddcc6f7.zip gcc-977a7752c7617d388cf14b72606e36fa5ddcc6f7.tar.gz gcc-977a7752c7617d388cf14b72606e36fa5ddcc6f7.tar.bz2 | |
(layout_decl): Turn off DECL_BIT_FIELD for BLKmode that's properly
aligned and a multiple of a byte.
From-SVN: r11892
| -rw-r--r-- | gcc/stor-layout.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/gcc/stor-layout.c b/gcc/stor-layout.c index e7510fe..78d53c0 100644 --- a/gcc/stor-layout.c +++ b/gcc/stor-layout.c @@ -278,6 +278,14 @@ layout_decl (decl, known_align) } } + /* Turn off DECL_BIT_FIELD if we won't need it set. */ + if (DECL_BIT_FIELD (decl) && TYPE_MODE (type) == BLKmode + && known_align % TYPE_ALIGN (type) == 0 + && DECL_SIZE (decl) != 0 + && (TREE_CODE (DECL_SIZE (decl)) != INTEGER_CST + || (TREE_INT_CST_LOW (DECL_SIZE (decl)) % BITS_PER_UNIT) == 0)) + DECL_BIT_FIELD (decl) = 0; + /* Evaluate nonconstant size only once, either now or as soon as safe. */ if (DECL_SIZE (decl) != 0 && TREE_CODE (DECL_SIZE (decl)) != INTEGER_CST) DECL_SIZE (decl) = variable_size (DECL_SIZE (decl)); |