1  /* { dg-do compile } */
       2  /* { dg-require-effective-target popcountl } */
       3  /* { dg-options "-O2 -fdump-tree-optimized" } */
       4  
       5  #if __SIZEOF_LONG__ == 4
       6  const unsigned long m1  = 0x55555555UL;
       7  const unsigned long m2  = 0x33333333UL;
       8  const unsigned long m4  = 0x0F0F0F0FUL;
       9  const unsigned long h01 = 0x01010101UL;
      10  const int shift = 24;
      11  #else
      12  const unsigned long m1  = 0x5555555555555555UL;
      13  const unsigned long m2  = 0x3333333333333333UL;
      14  const unsigned long m4  = 0x0f0f0f0f0f0f0f0fUL;
      15  const unsigned long h01 = 0x0101010101010101UL;
      16  const int shift = 56;
      17  #endif
      18  
      19  
      20  int popcount64c(unsigned long x)
      21  {
      22      x -= (x >> 1) & m1;
      23      x = (x & m2) + ((x >> 2) & m2);
      24      x = (x + (x >> 4)) & m4;
      25      return (x * h01) >> shift;
      26  }
      27  
      28  /* { dg-final { scan-tree-dump-times "\.POPCOUNT" 1 "optimized" { target int32plus } } } */
      29  /* { dg-final { scan-tree-dump "\.POPCOUNT" "optimized" { target { ! int32plus } } } } */
      30  
      31