| // https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110359 |
| // { dg-do compile } |
| // { dg-options "-fdump-tree-original" } |
| double pow(in double x, in ulong p) |
| { |
| import gcc.builtins : __builtin_expect; |
| if (__builtin_expect(p == 0, false)) |
| return 1; |
| if (__builtin_expect(p == 1, false)) |
| return x; |
| |
| double s = x; |
| double v = 1; |
| for (ulong i = p; i > 1; i >>= 1) |
| { |
| v = (i & 0x1) ? s * v : v; |
| s = s * s; |
| } |
| return v * s; |
| } |
| // { dg-final { scan-tree-dump "if \\(__builtin_expect \\(p == 0, 0\\) != 0\\)" "original" } } |
| // { dg-final { scan-tree-dump "if \\(__builtin_expect \\(p == 1, 0\\) != 0\\)" "original" } } |
