------- Comment #2 from hjl dot tools at gmail dot com 2009-02-09 14:57 -------
(In reply to comment #1)
> Confirmed. I think with -Os or even more with -mpreferred-stack-boundary
> dynamic stack alignment should _not_ be used.
>
That will cause core dump on programs with __m128/__m256. We have a few
choices for -Os.
1. Don't align DFmode/DImode on stacks. Or
2. Add a new switch to disable DFmode/DImode alignment on stack.
#1 may also cause problems for -Os -ftree-vectorize. I think we
should add a new switch to disable DFmode/DImode alignment on stack.
--
hjl dot tools at gmail dot com changed:
What |Removed |Added
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CC|hjl at gcc dot gnu dot org |hjl dot tools at gmail dot
| |com, Joey dot ye at intel
| |dot com, xuepeng dot guo at
| |intel dot com
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39137
