1  /* { dg-do run } */
       2  /* { dg-options "-O1" } */ 
       3  
       4  void abort (void);
       5  
       6  void radix_tree_tag_clear (int *node)
       7  {
       8  	int *path[2], **pathp = path, height;
       9  	volatile int *addr;
      10  	
      11  	height = 1;
      12  	pathp[0] = node;
      13  	
      14  	while (height > 0) {
      15  		pathp[1] = pathp[0];
      16  		pathp++;
      17  		height--;
      18  	}
      19  	
      20  	addr = pathp[0];
      21  	*addr = 1;
      22  }
      23  
      24  int main ()
      25  {
      26  	int n;
      27  	radix_tree_tag_clear (&n);
      28  	if (n != 1)
      29  		abort ();
      30  	return 0;
      31  }