1  /* { dg-do compile } */
       2  /* { dg-require-effective-target popcountl } */
       3  /* { dg-options "-O3 -fdump-tree-optimized -fno-tree-ch" } */
       4  
       5  extern int foo (int);
       6  
       7  int PopCount (long b) {
       8      int c = 0;
       9      b++;
      10  
      11      while (b) {
      12  	b &= b - 1;
      13  	c++;
      14      }
      15      return c;
      16  }
      17  int PopCount2 (long b) {
      18      int c = 0;
      19  
      20      while (b) {
      21  	b &= b - 1;
      22  	c++;
      23      }
      24      foo (c);
      25      return foo (c);
      26  }
      27  
      28  void PopCount3 (long b1) {
      29  
      30      for (long i = 0; i < b1; ++i)
      31        {
      32  	long b = i;
      33  	int c = 0;
      34  	while (b) {
      35  	    b &= b - 1;
      36  	    c++;
      37  	}
      38  	foo (c);
      39        }
      40  }
      41  
      42  /* { dg-final { scan-tree-dump-times "__builtin_popcount|\\.POPCOUNT" 3 "optimized" } } */