gcc/testsuite/gcc.target/i386/pr46880.c

   1 /* PR target/46880 */
   2 /* { dg-do run } */
   3 /* { dg-options "-O2 -fno-strict-aliasing -msse2" } */
   4 /* { dg-require-effective-target sse2_runtime } */
   5
   6 typedef double __m128d __attribute__ ((__vector_size__ (16), __may_alias__));
   7 typedef double (*T)[2];
   8
   9 static __attribute__ ((noinline, noclone)) __m128d
  10 foo (__m128d c, __m128d d)
  11 {
  12   T cp = (T) &c;
  13   T dp = (T) &d;
  14   __m128d e = { (*cp)[1], (*dp)[1] };
  15   return e;
  16 }
  17
  18 int
  19 main ()
  20 {
  21   __m128d c = { 1.0, 2.0 };
  22   __m128d d = { 3.0, 4.0 };
  23   union { __m128d x; double d[2]; } u;
  24   u.x = foo (c, d);
  25   if (u.d[0] != 2.0 || u.d[1] != 4.0)
  26     __builtin_abort ();
  27   return 0;
  28 }