gcc/testsuite/gcc.dg/tree-ssa/popcount3.c

   1 /* { dg-do compile } */
   2 /* { dg-require-effective-target popcountl } */
   3 /* { dg-options "-O2 -fdump-tree-phiopt4 -fdump-tree-optimized" } */
   4
   5 int PopCount (long b) {
   6     int c = 0;
   7
   8     while (b) {
   9         b &= b - 1;
  10         c++;
  11     }
  12     return c;
  13 }
  14
  15 /* { dg-final { scan-tree-dump-times "__builtin_popcount|\\.POPCOUNT" 1 "optimized" } } */
  16 /* { dg-final { scan-tree-dump-times "if" 0 "phiopt4" } } */