1  /* PR middle-end/48973 */
       2  
       3  extern void abort (void);
       4  struct S { int f : 1; } s;
       5  int v = -1;
       6  
       7  int
       8  main ()
       9  {
      10    s.f = v < 0;
      11    if ((unsigned int) s.f != -1U)
      12      abort ();
      13    return 0;
      14  }