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| author | Richard Stallman <rms@gnu.org> | 1992-06-30 03:10:06 +0000 |
|---|---|---|
| committer | Richard Stallman <rms@gnu.org> | 1992-06-30 03:10:06 +0000 |
| commit | d4c40650c2b74ed0bd3c17970e7d38f64c91a3cd (patch) | |
| tree | 8d61cc929a37ca53844ef0d1d39ceb677000a3bd /gcc/stor-layout.c | |
| parent | f3ee8ad13396dad3d2cbded7a3d7db44f5c75d22 (diff) | |
| download | gcc-d4c40650c2b74ed0bd3c17970e7d38f64c91a3cd.zip gcc-d4c40650c2b74ed0bd3c17970e7d38f64c91a3cd.tar.gz gcc-d4c40650c2b74ed0bd3c17970e7d38f64c91a3cd.tar.bz2 | |
*** empty log message ***
From-SVN: r1355
Diffstat (limited to 'gcc/stor-layout.c')
| -rw-r--r-- | gcc/stor-layout.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/gcc/stor-layout.c b/gcc/stor-layout.c index 16d1dab..abf8638 100644 --- a/gcc/stor-layout.c +++ b/gcc/stor-layout.c @@ -40,6 +40,10 @@ tree size_zero_node; tree size_one_node; +/* If nonzero, this is an upper limit on alignment of structure fields. + The value is measured in bits. */ +int maximum_field_alignment; + #define GET_MODE_ALIGNMENT(MODE) \ MIN (BIGGEST_ALIGNMENT, \ MAX (1, (GET_MODE_UNIT_SIZE (MODE) * BITS_PER_UNIT))) @@ -198,7 +202,12 @@ layout_decl (decl, known_align) /* Conditions are: a fixed size that is correct for another mode and occupying a complete byte or bytes on proper boundary. */ if (code == FIELD_DECL) - DECL_BIT_FIELD_TYPE (decl) = DECL_BIT_FIELD (decl) ? type : 0; + { + DECL_BIT_FIELD_TYPE (decl) = DECL_BIT_FIELD (decl) ? type : 0; + if (maximum_field_alignment != 0) + DECL_ALIGN (decl) = MIN (DECL_ALIGN (decl), maximum_field_alignment); + } + if (DECL_BIT_FIELD (decl) && TYPE_SIZE (type) != 0 && TREE_CODE (TYPE_SIZE (type)) == INTEGER_CST) |