[Bug target/37010] New: -Os passes __m128 on stack with wrong alignment

[hjl dot tools at gmail dot com]

-Os passes __m128 on stack with wrong alignment:

bash-3.2$ cat x.c
#include <emmintrin.h>

extern void foo (__m128 x, __m128 y ,__m128 z ,__m128 a, int size);

void
bar (void)
{
  __m128 x = { 1.0 };
  foo (x, x, x, x, 5);
}
bash-3.2$ /export/build/gnu/gcc-work/build-x86_64-linux/gcc/xgcc
-B/export/build/gnu/gcc-work/build-x86_64-linux/gcc/    -Os  -msse2  -m32 x.c
-S 
bash-3.2$ cat x.s
        .file   "x.c"
        .text
.globl bar
        .type   bar, @function
bar:
        pushl   %ebp
        movl    %esp, %ebp
        subl    $20, %esp
        movss   .LC0, %xmm0
        pushl   $5
        subl    $16, %esp
        movups  %xmm0, (%esp)
^^^^^^^^^^^^^^^^ This should be aligned at 16byte with movaps.
        movaps  %xmm0, %xmm2
        movaps  %xmm0, %xmm1
        call    foo
        addl    $32, %esp
        leave
        ret


-- 
           Summary: -Os passes __m128 on stack with wrong alignment
           Product: gcc
           Version: 4.4.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: hjl dot tools at gmail dot com
GCC target triplet: i686-pc-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37010