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| author | Michael Meissner <meissner@gcc.gnu.org> | 1995-03-31 14:35:03 +0000 |
|---|---|---|
| committer | Michael Meissner <meissner@gcc.gnu.org> | 1995-03-31 14:35:03 +0000 |
| commit | 566cdc73b667b4de2f1c98458f26e71a2facd2b0 (patch) | |
| tree | f2c75cf7bb2136590dae5f5d4bc8703039ed9264 /gcc/stor-layout.c | |
| parent | 7b09543e23a742fb42db0a0796b73b7b679854b0 (diff) | |
| download | gcc-566cdc73b667b4de2f1c98458f26e71a2facd2b0.tar.gz | |
Add -fpack-struct.
From-SVN: r9275
Diffstat (limited to 'gcc/stor-layout.c')
| -rw-r--r-- | gcc/stor-layout.c | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/gcc/stor-layout.c b/gcc/stor-layout.c index a3c4f5c265a..669a1de2523 100644 --- a/gcc/stor-layout.c +++ b/gcc/stor-layout.c @@ -1,5 +1,5 @@ /* C-compiler utilities for types and variables storage layout - Copyright (C) 1987, 1988, 1992, 1993, 1994 Free Software Foundation, Inc. + Copyright (C) 1987, 1988, 1992, 1993, 1994, 1995 Free Software Foundation, Inc. This file is part of GNU CC. @@ -22,6 +22,7 @@ the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ #include <stdio.h> #include "tree.h" +#include "flags.h" #include "function.h" #define CEIL(x,y) (((x) + (y) - 1) / (y)) @@ -241,6 +242,8 @@ layout_decl (decl, known_align) 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); + else if (flag_pack_struct) + DECL_ALIGN (decl) = MIN (DECL_ALIGN (decl), BITS_PER_UNIT); } if (DECL_BIT_FIELD (decl) @@ -364,6 +367,8 @@ layout_record (rec) int type_align = TYPE_ALIGN (TREE_TYPE (field)); if (maximum_field_alignment != 0) type_align = MIN (type_align, maximum_field_alignment); + else if (flag_pack_struct) + type_align = MIN (type_align, BITS_PER_UNIT); record_align = MAX (record_align, type_align); } @@ -406,6 +411,7 @@ layout_record (rec) && !DECL_PACKED (field) /* If #pragma pack is in effect, turn off this feature. */ && maximum_field_alignment == 0 + && !flag_pack_struct && !integer_zerop (DECL_SIZE (field))) { int type_align = TYPE_ALIGN (TREE_TYPE (field)); @@ -440,6 +446,8 @@ layout_record (rec) if (maximum_field_alignment != 0) type_align = MIN (type_align, maximum_field_alignment); + else if (flag_pack_struct) + type_align = MIN (type_align, BITS_PER_UNIT); /* A bit field may not span the unit of alignment of its type. Advance to next boundary if necessary. */ |