[libcxx-commits] [libcxx] [libcxx] Use generic builtins for popcount, clz and ctz (PR #86563)

[Nick Desaulniers via libcxx-commits]

================
@@ -38,6 +41,9 @@ _LIBCPP_NODISCARD inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR int __libcpp_cl
 
 #ifndef _LIBCPP_HAS_NO_INT128
 inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR int __libcpp_clz(__uint128_t __x) _NOEXCEPT {
+#  if __has_builtin(__builtin_clzg)
----------------
nickdesaulniers wrote:

These headers seem to not put whitespace after the `#`. Mind staying consistent in this file (and libcxx/include/__bit/popcount.h)? Then we should be good to go.  Perhaps your editor is trying to auto indent these.

https://github.com/llvm/llvm-project/pull/86563