--- Comment #7 from hjl dot tools at gmail dot com 2009-02-12 02:37 ---
(In reply to comment #6)
> So simply enable ACCUMULATE_OUTGOING_ARGS for stack realign isn't be the best
> option for all cases either.
>
OK. I am closing as WONTFIX.
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hjl dot tools at gmail dot com changed:
--- Comment #6 from Joey dot ye at intel dot com 2009-02-12 02:33 ---
(In reply to comment #5)
> If ACCUMULATE_OUTGOING_ARGS is off, ECX will be used
> for stack alignment and it may lead to code size
> increase due to register spill since ia32 has very
> few registers.
The code increase
--- Comment #5 from hjl dot tools at gmail dot com 2009-02-12 00:44 ---
I tried -maccumulate-outgoing-args on 2.6 kernel:
textdata bss dec hex filename
5136786 600084 1003520 6740390 66d9a6 vmlinux
5086759 600084 1003520 6690363 66163b /tmp/vmlinux.old
It does in
--- Comment #4 from hjl dot tools at gmail dot com 2009-02-11 17:16 ---
(In reply to comment #3)
> If you mean setting ACCUMULATE_OUTGOING_ARGS to true, I bet that could help
Oops. Yes, I meant setting ACCUMULATE_OUTGOING_ARGS to true when stack
alignment is needed.
> very small functi
--- Comment #3 from jakub at gcc dot gnu dot org 2009-02-11 17:11 ---
If you mean setting ACCUMULATE_OUTGOING_ARGS to true, I bet that could help
very small functions that need dynamic realignment, but certainly for larger
functions !ACCUMULATE_OUTGOING_ARGS results in smaller code, even
--- Comment #2 from hjl dot tools at gmail dot com 2009-02-11 15:54 ---
One way to fix this is to set ACCUMULATE_OUTGOING_ARGS to false
when we need stack alignment.
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39148
--- Comment #1 from hjl dot tools at gmail dot com 2009-02-10 20:46 ---
The problem is
static rtx
ix86_get_drap_rtx (void)
{
if (ix86_force_drap || !ACCUMULATE_OUTGOING_ARGS)
crtl->need_drap = true;
-Os turns off ACCUMULATE_OUTGOING_ARGS, which turns on DRAP. Does
ACCUMULATE_OU
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hjl dot tools at gmail dot com changed:
What|Removed |Added
Target Milestone|--- |4.4.0
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39148
