1  /* { dg-do compile } */
       2  /* { dg-options "-O2 -fdump-tree-optimized -mgeneral-regs-only" } */
       3  
       4  int PopCount (long b) {
       5      int c = 0;
       6  
       7      while (b) {
       8  	b &= b - 1;
       9  	c++;
      10      }
      11      return c;
      12  }
      13  
      14  /* { dg-final { scan-tree-dump-times "__builtin_popcount|\\.POPCOUNT" 0 "optimized" } } */