gcc/testsuite/gcc.target/i386/20060512-1.c

   1 /* { dg-do run { target i?86-*-* } } */
   2 /* { dg-options "-std=gnu99 -msse2" } */
   3 #include <emmintrin.h>
   4 __m128i __attribute__ ((__noinline__))
   5 vector_using_function ()
   6 {
   7   volatile __m128i vx;  /* We want to force a vector-aligned store into the stack.  */
   8   vx = _mm_xor_si128 (vx, vx);
   9   return vx;
  10 }
  11 int __attribute__ ((__noinline__, __force_align_arg_pointer__))
  12 self_aligning_function (int x, int y)
  13 {
  14   __m128i ignored = vector_using_function ();
  15   return (x + y);
  16 }
  17 int g_1 = 20;
  18 int g_2 = 22;
  19 int
  20 main ()
  21 {
  22   int result;
  23   asm ("pushl %esi");           /* Disalign runtime stack.  */
  24   result = self_aligning_function (g_1, g_2);
  25   asm ("popl %esi");
  26   if (result != 42)
  27     abort ();
  28 }