1  /* PR tree-optimization/94800 */
       2  /* { dg-do compile } */
       3  /* { dg-require-effective-target popcount } */
       4  /* { dg-require-effective-target int32plus } */
       5  /* { dg-options "-O2 -fdump-tree-optimized" } */
       6  
       7  const unsigned m1  = 0x55555555UL;
       8  const unsigned m2  = 0x33333333UL;
       9  const unsigned m4  = 0x0F0F0F0FUL;
      10  const int shift = 24;
      11  
      12  int popcount64c(unsigned x)
      13  {
      14      x -= (x >> 1) & m1;
      15      x = (x & m2) + ((x >> 2) & m2);
      16      x = (x + (x >> 4)) & m4;
      17      x += (x << 8);
      18      x += (x << 16);
      19      return x >> shift;
      20  }
      21  
      22  /* { dg-final { scan-tree-dump-times "\.POPCOUNT" 1 "optimized" } } */