Avoid duplicate signatures

Author: marcauberer

libcxx/include/__bit/countl.h

@@ -59,25 +59,15 @@ inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR int __libcpp_clz(__uint128_t __x)
 }
 #endif // _LIBCPP_HAS_NO_INT128
 
-#if __has_builtin(__builtin_clzg)
-
 template <class _Tp>
 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 int __countl_zero(_Tp __t) _NOEXCEPT {
   static_assert(__libcpp_is_unsigned_integer<_Tp>::value, "__countl_zero requires an unsigned integer type");
   if (__t == 0)
     return numeric_limits<_Tp>::digits;
 
+#if __has_builtin(__builtin_clzg)
   return __builtin_clzg(__t);
-}
-
-#else // __has_builtin(__builtin_clzg)
-
-template <class _Tp>
-_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 int __countl_zero(_Tp __t) _NOEXCEPT {
-  static_assert(__libcpp_is_unsigned_integer<_Tp>::value, "__countl_zero requires an unsigned integer type");
-  if (__t == 0)
-    return numeric_limits<_Tp>::digits;
-
+#else  // __has_builtin(__builtin_clzg)
   if (sizeof(_Tp) <= sizeof(unsigned int))
     return std::__libcpp_clz(static_cast<unsigned int>(__t)) -
            (numeric_limits<unsigned int>::digits - numeric_limits<_Tp>::digits);
@@ -99,9 +89,8 @@ _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 int __countl_zero(_Tp __t) _
     }
     return __ret + __iter;
   }
-}
-
 #endif // __has_builtin(__builtin_clzg)
+}
 
 #if _LIBCPP_STD_VER >= 20
 

libcxx/include/__bit/countr.h

@@ -38,23 +38,14 @@ _LIBCPP_NODISCARD inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR int __libcpp_ct
   return __builtin_ctzll(__x);
 }
 
-#if __has_builtin(__builtin_ctzg)
-
 template <class _Tp>
 _LIBCPP_NODISCARD _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 int __countr_zero(_Tp __t) _NOEXCEPT {
   if (__t == 0)
     return numeric_limits<_Tp>::digits;
 
+#if __has_builtin(__builtin_ctzg)
   return __builtin_ctzg(__t);
-}
-
-#else // __has_builtin(__builtin_ctzg)
-
-template <class _Tp>
-_LIBCPP_NODISCARD _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 int __countr_zero(_Tp __t) _NOEXCEPT {
-  if (__t == 0)
-    return numeric_limits<_Tp>::digits;
-
+#else  // __has_builtin(__builtin_ctzg)
   if (sizeof(_Tp) <= sizeof(unsigned int))
     return std::__libcpp_ctz(static_cast<unsigned int>(__t));
   else if (sizeof(_Tp) <= sizeof(unsigned long))
@@ -70,9 +61,8 @@ _LIBCPP_NODISCARD _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 int __coun
     }
     return __ret + std::__libcpp_ctz(static_cast<unsigned long long>(__t));
   }
-}
-
 #endif // __has_builtin(__builtin_ctzg)
+}
 
 #if _LIBCPP_STD_VER >= 20
 

libcxx/include/__bit/popcount.h

@@ -40,17 +40,11 @@ inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR int __libcpp_popcount(unsigned lo
 
 #if _LIBCPP_STD_VER >= 20
 
-#  if __has_builtin(__builtin_popcountg)
-
 template <__libcpp_unsigned_integer _Tp>
 _LIBCPP_NODISCARD_EXT _LIBCPP_HIDE_FROM_ABI constexpr int popcount(_Tp __t) noexcept {
+#  if __has_builtin(__builtin_popcountg)
   return __builtin_popcountg(__t);
-}
-
-#  else // __has_builtin(__builtin_popcountg)
-
-template <__libcpp_unsigned_integer _Tp>
-_LIBCPP_NODISCARD_EXT _LIBCPP_HIDE_FROM_ABI constexpr int popcount(_Tp __t) noexcept {
+#  else  // __has_builtin(__builtin_popcountg)
   if (sizeof(_Tp) <= sizeof(unsigned int))
     return std::__libcpp_popcount(static_cast<unsigned int>(__t));
   else if (sizeof(_Tp) <= sizeof(unsigned long))
@@ -65,9 +59,8 @@ _LIBCPP_NODISCARD_EXT _LIBCPP_HIDE_FROM_ABI constexpr int popcount(_Tp __t) noex
     }
     return __ret;
   }
-}
-
 #  endif // __has_builtin(__builtin_popcountg)
+}
 
 #endif // _LIBCPP_STD_VER >= 20