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| author | Jan Hubicka <hubicka@freesoft.cz> | 1999-12-15 16:34:03 +0100 |
|---|---|---|
| committer | Jan Hubicka <hubicka@gcc.gnu.org> | 1999-12-15 15:34:03 +0000 |
| commit | a087165623999d7fd5c743e1f63070a9556455db (patch) | |
| tree | 215902be6cfedc77251a1f95f5439f107231e3df /gcc/function.c | |
| parent | 285f3cf09acda794f6e7bba9cb6d5163c94b5af4 (diff) | |
| download | gcc-a087165623999d7fd5c743e1f63070a9556455db.zip gcc-a087165623999d7fd5c743e1f63070a9556455db.tar.gz gcc-a087165623999d7fd5c743e1f63070a9556455db.tar.bz2 | |
function.c (PREFERRED_STACK_BOUDNARY): Provide default value.
* function.c (PREFERRED_STACK_BOUDNARY): Provide default value.
(assign_stack_local_1): Limit alignment to PREFERRED_STACK_BOUNDARY,
update stack_alignment_needed.
(prepare_function_start): Initialize stack_alignment_needed
* function.h (struct function): Add field stack_alignment_needed.
From-SVN: r30958
Diffstat (limited to 'gcc/function.c')
| -rw-r--r-- | gcc/function.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/gcc/function.c b/gcc/function.c index 67f5e41..2392f32 100644 --- a/gcc/function.c +++ b/gcc/function.c @@ -68,6 +68,10 @@ Boston, MA 02111-1307, USA. */ #define LOCAL_ALIGNMENT(TYPE, ALIGNMENT) ALIGNMENT #endif +#if !defined (PREFERRED_STACK_BOUNDARY) && defined (STACK_BOUNDARY) +#define PREFERRED_STACK_BOUNDARY STACK_BOUNDARY +#endif + /* Some systems use __main in a way incompatible with its use in gcc, in these cases use the macros NAME__MAIN to give a quoted symbol and SYMBOL__MAIN to give the same symbol without quotes for an alternative entry point. You @@ -543,6 +547,13 @@ assign_stack_local_1 (mode, size, align, function) function->x_frame_offset -= size; #endif + /* Ignore alignment we can't do with expected alignment of the boundary. */ + if (alignment * BITS_PER_UNIT > PREFERRED_STACK_BOUNDARY) + alignment = PREFERRED_STACK_BOUNDARY / BITS_PER_UNIT; + + if (function->stack_alignment_needed < alignment * BITS_PER_UNIT) + function->stack_alignment_needed = alignment * BITS_PER_UNIT; + /* Round frame offset to that alignment. We must be careful here, since FRAME_OFFSET might be negative and division with a negative dividend isn't as well defined as we might @@ -5764,6 +5775,8 @@ prepare_function_start () current_function->original_decl_initial = 0; current_function->original_arg_vector = 0; + current_function->stack_alignment_needed = 0; + /* Set if a call to setjmp is seen. */ current_function_calls_setjmp = 0; |