gcc/testsuite/gcc.dg/fold-popcount-5.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2 -fdump-tree-optimized" } */
   3 /* { dg-require-effective-target int32plus } */
   4
   5 int test_and4(unsigned int a)
   6 {
   7   return __builtin_popcount(a&4);
   8 }
   9
  10 int test_and4l(unsigned long b)
  11 {
  12   return __builtin_popcountl(b&4);
  13 }
  14
  15 int test_and4ll(unsigned long long c)
  16 {
  17   return __builtin_popcountll(c&4);
  18 }
  19
  20 int test_shift(unsigned int d)
  21 {
  22   int bits = 8*sizeof(unsigned int)-1;
  23   return __builtin_popcount(d<<31);
  24 }
  25
  26 int test_shiftl(unsigned long e)
  27 {
  28   int bits = 8*sizeof(unsigned long)-1;
  29   return __builtin_popcountl(e<<bits);
  30 }
  31
  32 int test_shiftll(unsigned long long f)
  33 {
  34   int bits = 8*sizeof(unsigned long long)-1;
  35   return __builtin_popcountll(f<<bits);
  36 }
  37
  38 /* { dg-final { scan-tree-dump-times "popcount" 0 "optimized" } } */
  39