1  /* { dg-do compile } */
       2  /* { dg-options "-O -ftree-vrp -fwrapv" } */
       3  
       4  extern void bar(int);
       5  void checkgroups(int last, int verbose) 
       6  {
       7      int window = 0;
       8      int outstanding = 0;
       9      while (window < last || outstanding) {
      10  	while (outstanding < 47 && window < last) {
      11  	    if (window < last) { 
      12  		outstanding++; 
      13  		if (verbose)
      14  		    bar(window);
      15  		bar(window++);
      16  	    }
      17  	}
      18  	if (outstanding > 0)
      19  	    bar(0);
      20      }
      21  }
      22