gcc/testsuite/gcc.target/i386/pr46716.c

   1 /* { dg-do run } */
   2 /* { dg-options "-O2 -msse -mno-sse2" } */
   3 /* { dg-require-effective-target sse } */
   4
   5 #include "sse-check.h"
   6
   7 typedef double V __attribute__ ((__vector_size__ (16), __may_alias__));
   8 typedef union
   9 {
  10   V x;
  11   double a[2];
  12 } u;
  13
  14 #define EMM_FLT8(a) ((double *)&(a))
  15
  16 void __attribute__ ((noinline))
  17 test (V s1, V s2)
  18 {
  19   if (EMM_FLT8(s1)[0] != EMM_FLT8(s2)[0]
  20       || EMM_FLT8(s1)[1] != EMM_FLT8(s2)[1])
  21     abort ();
  22 }
  23
  24 static void
  25 sse_test (void)
  26 {
  27   u s1;
  28
  29   s1.a[0] = 1.0;
  30   s1.a[1] = 2.0;
  31
  32   test (s1.x, s1.x);
  33 }