1  /* PR tree-optimization/108688 */
       2  
       3  union U { signed int d : 7; signed int e : 2; } u;
       4  int a, b;
       5  
       6  void
       7  foo (void)
       8  {
       9    for (int i = 0; i < 64; i++)
      10      {
      11        u.d = a;
      12        u.e ^= b;
      13      }
      14  }