1  /* { dg-do compile } */
       2  
       3  extern int a, b, k, q;
       4  
       5  void
       6  foo ()
       7  {
       8    if (a)
       9      {
      10        while (q)
      11  	{
      12  	lbl:
      13  	  if (a)
      14  	    {
      15  	      a = 0;
      16  	      goto lbl;
      17  	    }
      18  	}
      19        b = k;
      20      }
      21    goto lbl;
      22  }