http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49001
Uros Bizjak <ubizjak at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |ktietz at gcc dot gnu.org
Severity|critical |normal
--- Comment #1 from Uros Bizjak <ubizjak at gmail dot com> 2011-05-15 18:49:44
UTC ---
(In reply to comment #0)
> I'm using a custom mingw64 build of GCC 4.6.1. My target is Windows 64bit. I
> compile with g++ -03 -march=corei7-avx -mtune=corei7-avx -mavx.
Please provide testcase that can be compiled without changes. See [1].
FWIW, I have tested following testcase on x86_64-pc-linux-gnu:
--cut here--
#include <x86intrin.h>
__m256 sin256_ps_avx (__m256);
__m256 dummy_ps256;
void test_stackalign32() {
volatile __m256 x = dummy_ps256;
dummy_ps256 = sin256_ps_avx(x);
}
--cut here--
And got expected code (gcc-4.6.1):
test_stackalign32:
.LFB828:
.cfi_startproc
pushq %rbp
.cfi_def_cfa_offset 16
.cfi_offset 6, -16
movq %rsp, %rbp
.cfi_def_cfa_register 6
andq $-32, %rsp
subq $32, %rsp
vmovaps dummy_ps256(%rip), %ymm0
vmovaps %ymm0, (%rsp)
vmovaps (%rsp), %ymm0
call sin256_ps_avx
vmovaps %ymm0, dummy_ps256(%rip)
leave
.cfi_def_cfa 7, 8
vzeroupper
ret
Probably mingw64 specific problem... CC added.
[1] http://gcc.gnu.org/bugs/#report
