[Bug target/27537] XMM alignment fault when compiling for i386 with -Os

["hjl at lucon dot org" <gcc-bugzilla@gcc.gnu.org>]

------- Comment #5 from hjl at lucon dot org  2006-06-07 15:51 -------
This testcase doesn't use -Os on SSE registers:

[hjl@gnu-10 stack]$ cat m.c
#include <stdio.h>
extern char *e1 (void);
int
main ()
{
  printf ("%s\n", e1 ());
  return 0;
}
[hjl@gnu-10 stack]$ cat x.c
#include <emmintrin.h>
extern char *e1 (void);
char *e1 (void)
{
  volatile __m128 dummy = _mm_set_ps1(0.f);
  return "OK";
}
[hjl@gnu-10 stack]$ make
gcc -Os   -c -o m.o m.c
gcc -O -msse2   -c -o x.o x.c
gcc -o m m.o x.o
./m
make: *** [all] Segmentation fault
[hjl@gnu-10 stack]$

It calls a function which uses SSE registers.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27537