1  /* { dg-do compile } */
       2  /* { dg-additional-options "-Wno-aggressive-loop-optimizations" } */
       3  
       4  unsigned int a;
       5  int b[1], c, d;
       6  
       7  void
       8  fn1 ()
       9  {
      10    for (; d;)
      11      {
      12        a = c = 0;
      13        for (; c < 5; c++)
      14  	{
      15  	  b[a] ^= 1;
      16  	  a--;
      17  	}
      18      }
      19  }