1  /* { dg-do compile } */
       2  /* { dg-options "-O -fcaller-saves -fschedule-insns2 -fselective-scheduling2 -mtune=core2" } */
       3  
       4  union double_union
       5  {
       6    double d;
       7    int i[2];
       8  };
       9  
      10  void bar (int, ...);
      11  
      12  void
      13  foo (double d)
      14  {
      15    union double_union du = { d };
      16    while (1)
      17      {
      18        du.i[1] -= 0x100000L;
      19        bar (0, du.d);
      20        du.d += d;
      21      }
      22  }