1  /* PR middle-end/52209 */
       2  
       3  extern void abort (void);
       4  struct S0 { int f2 : 1; } c;
       5  int b;
       6  
       7  int
       8  main ()
       9  {
      10    b = -1 ^ c.f2;
      11    if (b != -1)
      12      abort ();
      13    return 0;
      14  }