diff options
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; |