diff options
| author | ebotcazou <ebotcazou@138bc75d-0d04-0410-961f-82ee72b054a4> | 2011-01-18 21:29:11 +0000 |
|---|---|---|
| committer | ebotcazou <ebotcazou@138bc75d-0d04-0410-961f-82ee72b054a4> | 2011-01-18 21:29:11 +0000 |
| commit | 156512c1e4081eeff3ff8ba147237a4e7fa24336 (patch) | |
| tree | 8cc1b63baa2f41820df5c80ec6e17cbd79ac56dd /gcc/explow.c | |
| parent | 329c1e4ecc2154f2411625dcbf449679b4241534 (diff) | |
| download | gcc-156512c1e4081eeff3ff8ba147237a4e7fa24336.tar.gz | |
PR middle-end/46894
* explow.c (allocate_dynamic_stack_space): Do not assume more than
BITS_PER_UNIT alignment if STACK_DYNAMIC_OFFSET or STACK_POINTER_OFFSET
are defined.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@168968 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/explow.c')
| -rw-r--r-- | gcc/explow.c | 19 |
1 files changed, 12 insertions, 7 deletions
diff --git a/gcc/explow.c b/gcc/explow.c index 836f244b3a1..2a182065bca 100644 --- a/gcc/explow.c +++ b/gcc/explow.c @@ -1148,6 +1148,7 @@ allocate_dynamic_stack_space (rtx size, unsigned size_align, { HOST_WIDE_INT stack_usage_size = -1; rtx final_label, final_target, target; + unsigned extra_align = 0; bool must_align; /* If we're asking for zero bytes, it doesn't matter what we point @@ -1231,21 +1232,25 @@ allocate_dynamic_stack_space (rtx size, unsigned size_align, that might result from the alignment operation. */ must_align = (crtl->preferred_stack_boundary < required_align); -#if defined (STACK_DYNAMIC_OFFSET) || defined (STACK_POINTER_OFFSET) - must_align = true; -#endif - if (must_align) { - unsigned extra, extra_align; - if (required_align > PREFERRED_STACK_BOUNDARY) extra_align = PREFERRED_STACK_BOUNDARY; else if (required_align > STACK_BOUNDARY) extra_align = STACK_BOUNDARY; else extra_align = BITS_PER_UNIT; - extra = (required_align - extra_align) / BITS_PER_UNIT; + } + + /* ??? STACK_POINTER_OFFSET is always defined now. */ +#if defined (STACK_DYNAMIC_OFFSET) || defined (STACK_POINTER_OFFSET) + must_align = true; + extra_align = BITS_PER_UNIT; +#endif + + if (must_align) + { + unsigned extra = (required_align - extra_align) / BITS_PER_UNIT; size = plus_constant (size, extra); size = force_operand (size, NULL_RTX); |