1  foo (a)
       2       int a;
       3  {
       4    int b = 8;
       5  
       6    if ((a << b) >= 0)
       7      return 1;
       8    return a;
       9  }
      10  
      11  main ()
      12  {
      13    if (foo (0x00ffffff) == 1)
      14      puts ("y");
      15  }