1  typedef int xtype;
       2  
       3  foo (p, pc)
       4       xtype *p;
       5       char *pc;
       6  {
       7    xtype a;
       8    unsigned b = 0;
       9  
      10    a = *p;
      11    p[1] = a;
      12    if ((unsigned) p[1] > 0)
      13      return 1;
      14    return a;
      15  }