1  /* { dg-do compile } */
       2  /* { dg-options "-w" } */
       3  
       4  int dk;
       5  
       6  void
       7  lv (void)
       8  {
       9    int nm;
      10  
      11    dk = 1;
      12    while (dk != 0)
      13      {
      14      }
      15  
      16    if (1 / 0)
      17      {
      18        dk = 0;
      19        while (dk != 0)
      20  	{
      21  	}
      22      }
      23  
      24    for (;;)
      25      nm = !!dk;
      26  
      27    (void) nm;
      28  }