gcc/testsuite/gdc.dg/pr110359.d

   1 // https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110359
   2 // { dg-do compile }
   3 // { dg-options "-fdump-tree-original" }
   4 double pow(in double x, in ulong p)
   5 {
   6     import gcc.builtins : __builtin_expect;
   7     if (__builtin_expect(p == 0, false))
   8         return 1;
   9     if (__builtin_expect(p == 1, false))
  10         return x;
  11
  12     double s = x;
  13     double v = 1;
  14     for (ulong i = p; i > 1; i >>= 1)
  15     {
  16         v = (i & 0x1) ? s * v : v;
  17         s = s * s;
  18     }
  19     return v * s;
  20 }
  21 // { dg-final { scan-tree-dump "if \\(__builtin_expect \\(p == 0, 0\\) != 0\\)" "original" } }
  22 // { dg-final { scan-tree-dump "if \\(__builtin_expect \\(p == 1, 0\\) != 0\\)" "original" } }