1  int
       2  foo(void)
       3  {
       4    int      a,b,g;
       5    int      i,len;
       6    int      stop;
       7                                                                       
       8    len = 10;
       9    stop = 0;
      10    for (i=0; i<len; i++)
      11    {
      12      a = bar1() ? 0 : 1;
      13      b = bar2() ? 0 : 1;
      14      g = bar3() ? 0 : 1;
      15                                                                       
      16      if (stop = ((a+b) % 2 != g)) break;
      17    }
      18   
      19    return stop;
      20  }