diff options
Diffstat (limited to 'gcc/explow.c')
| -rw-r--r-- | gcc/explow.c | 15 |
1 files changed, 7 insertions, 8 deletions
diff --git a/gcc/explow.c b/gcc/explow.c index e2c8e45..696f066 100644 --- a/gcc/explow.c +++ b/gcc/explow.c @@ -1206,7 +1206,6 @@ get_dynamic_stack_size (rtx *psize, unsigned size_align, unsigned required_align, HOST_WIDE_INT *pstack_usage_size) { - unsigned extra = 0; rtx size = *psize; /* Ensure the size is in the proper mode. */ @@ -1242,16 +1241,16 @@ get_dynamic_stack_size (rtx *psize, unsigned size_align, example), so we must preventively align the value. We leave space in SIZE for the hole that might result from the alignment operation. */ - /* Since the stack is presumed to be aligned before this allocation, - we only need to increase the size of the allocation if the required - alignment is more than the stack alignment. */ - if (required_align > STACK_BOUNDARY) + unsigned known_align = REGNO_POINTER_ALIGN (VIRTUAL_STACK_DYNAMIC_REGNUM); + if (known_align == 0) + known_align = BITS_PER_UNIT; + if (required_align > known_align) { - extra = (required_align - STACK_BOUNDARY) / BITS_PER_UNIT; + unsigned extra = (required_align - known_align) / BITS_PER_UNIT; size = plus_constant (Pmode, size, extra); size = force_operand (size, NULL_RTX); - if (size_align > STACK_BOUNDARY) - size_align = STACK_BOUNDARY; + if (size_align > known_align) + size_align = known_align; if (flag_stack_usage_info && pstack_usage_size) *pstack_usage_size += extra; |