[libcxx-commits] [libcxx] [libc++] Use _BitInt and __builtin_popcountg in bitset::count() (PR #160679)

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``````````bash
git-clang-format --diff origin/main HEAD --extensions  -- libcxx/include/bitset
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``````````diff
diff --git a/libcxx/include/bitset b/libcxx/include/bitset
index d8bb93845..2ea01e12b 100644
--- a/libcxx/include/bitset
+++ b/libcxx/include/bitset
@@ -867,11 +867,11 @@ bitset<_Size>::to_string(char __zero, char __one) const {
 
 template <size_t _Size>
 inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX23 size_t bitset<_Size>::count() const _NOEXCEPT {
-#ifdef _LIBCPP_COMPILER_CLANG_BASED
+#  ifdef _LIBCPP_COMPILER_CLANG_BASED
   if constexpr (_Size <= __base::__bits_per_word) {
     return __builtin_popcountg(static_cast<unsigned _BitInt(_Size)>(__base::__first_));
   } else
-#endif
+#  endif
   {
     return static_cast<size_t>(std::count(__base::__make_iter(0), __base::__make_iter(_Size), true));
   }

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https://github.com/llvm/llvm-project/pull/160679