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

   1 /* { dg-do run } */
   2 /* { dg-options "-std=gnu99 -msse2 -mpreferred-stack-boundary=4" } */
   3 /* { dg-require-effective-target sse2 } */
   4
   5 #include "sse2-check.h"
   6
   7 #include <emmintrin.h>
   8
   9 #ifdef __x86_64__
  10 # define PUSH "pushq %rsi"
  11 # define POP "popq %rsi"
  12 #else
  13 # define PUSH "pushl %esi"
  14 # define POP "popl %esi"
  15 #endif
  16
  17 __m128i __attribute__ ((__noinline__))
  18 vector_using_function ()
  19 {
  20   volatile __m128i vx;  /* We want to force a vector-aligned store into the stack.  */
  21   vx = _mm_xor_si128 (vx, vx);
  22   return vx;
  23 }
  24 int __attribute__ ((__noinline__, __force_align_arg_pointer__))
  25 self_aligning_function (int x, int y)
  26 {
  27   __m128i ignored = vector_using_function ();
  28   return (x + y);
  29 }
  30 int g_1 = 20;
  31 int g_2 = 22;
  32
  33 static void
  34 sse2_test (void)
  35 {
  36   int result;
  37   asm (PUSH);                  /* Misalign runtime stack.  */
  38   result = self_aligning_function (g_1, g_2);
  39   if (result != 42)
  40     abort ();
  41   asm (POP);
  42 }