[Bug target/25203] [4.0] enable checking failure in g++.dg/opt/mmx2.C

["ghazi at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>]

------- Comment #1 from ghazi at gcc dot gnu dot org  2005-12-03 20:06 -------
Here's a reduced testcase, configure 4.0.x with --enable-checking=yes,rtl
--target=i686-pc-linux-gnu and compile with:

cc1plus -fpreprocessed mmx2.ii -quiet -dumpbase mmx2.C -mmmx -mtune=pentiumpro
-auxbase mmx2 -O2 -version -fmessage-length=0 -o mmx2.s


typedef int __m64 __attribute__ ((__vector_size__ (8)));

static __inline void
_mm_empty (void)
{
  __builtin_ia32_emms ();
}

static __inline __m64
_mm_set_pi32 (int __i1, int __i0)
{
  return (__m64) __builtin_ia32_vec_init_v2si (__i0, __i1);
}

static union u { __m64 m; long long l; } u;
extern "C" void abort (void);

__attribute__((noinline))
void bar (__m64 x)
{
  u.m = x;
}

int
main ()
{
  bar (_mm_set_pi32 (0x000000FF,0xFFFF00FF));
  _mm_empty ();
  if (u.l != 0xffffff00ffLL)
    abort ();
  return 0;
}


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25203