1  unsigned long*
       2  f(p)unsigned long*p;
       3  {
       4    unsigned long a = (*p++) >> 24;
       5    return p + a;
       6  }
       7  
       8  main ()
       9  {
      10    unsigned long x = 0x80000000UL;
      11    if (f(&x) != &x + 0x81)
      12      abort();
      13    exit(0);
      14  }