1  int
       2  foo (a, b)
       3  int *a,  *b;
       4  {
       5    int x, y;
       6    x++;
       7    *a = *b;
       8    y = *b;
       9  
      10    if ((int) x)
      11      return 1;
      12    else
      13      return y;
      14  }
      15  
      16  foo1 (p)
      17       int *p;
      18  {
      19    p[0] = p[1];
      20    return p[0];
      21  }
      22  
      23  foo2 (p, x)
      24       int *p;
      25  {
      26    p[0] = x;
      27    return p[0];
      28  }
      29