libcxx: update to LLVM 18

release/18.x branch, commit 78b99c73ee4b96fe9ce0e294d4632326afb2db42

This adds the flag `-D_LIBCPP_HARDENING_MODE` which is determined based
on the Zig optimization mode.

This commit also fixes libunwind, libcxx, and libcxxabi to properly
report sub compilation errors.

1 files changed, 22 insertions, 52 deletions

diff --git a/lib/libcxx/include/__utility/cmp.h b/lib/libcxx/include/__utility/cmp.h
index 7b7b90136e..b7c1ed614d 100644
--- a/lib/libcxx/include/__utility/cmp.h
+++ b/lib/libcxx/include/__utility/cmp.h
@@ -9,14 +9,10 @@
 #ifndef _LIBCPP___UTILITY_CMP_H
 #define _LIBCPP___UTILITY_CMP_H
 
+#include <__concepts/arithmetic.h>
 #include <__config>
-#include <__type_traits/disjunction.h>
-#include <__type_traits/is_integral.h>
-#include <__type_traits/is_same.h>
 #include <__type_traits/is_signed.h>
 #include <__type_traits/make_unsigned.h>
-#include <__utility/forward.h>
-#include <__utility/move.h>
 #include <limits>
 
 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
@@ -29,24 +25,9 @@ _LIBCPP_PUSH_MACROS
 _LIBCPP_BEGIN_NAMESPACE_STD
 
 #if _LIBCPP_STD_VER >= 20
-template<class _Tp, class... _Up>
-struct _IsSameAsAny : _Or<_IsSame<_Tp, _Up>...> {};
-
-template<class _Tp>
-concept __is_safe_integral_cmp = is_integral_v<_Tp> &&
-                      !_IsSameAsAny<_Tp, bool, char, char16_t, char32_t
-#ifndef _LIBCPP_HAS_NO_CHAR8_T
-                                    , char8_t
-#endif
-#ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS
-                                    , wchar_t
-#endif
-                                    >::value;
 
-template<__is_safe_integral_cmp _Tp, __is_safe_integral_cmp _Up>
-_LIBCPP_INLINE_VISIBILITY constexpr
-bool cmp_equal(_Tp __t, _Up __u) noexcept
-{
+template <__libcpp_integer _Tp, __libcpp_integer _Up>
+_LIBCPP_HIDE_FROM_ABI constexpr bool cmp_equal(_Tp __t, _Up __u) noexcept {
   if constexpr (is_signed_v<_Tp> == is_signed_v<_Up>)
     return __t == __u;
   else if constexpr (is_signed_v<_Tp>)
@@ -55,17 +36,13 @@ bool cmp_equal(_Tp __t, _Up __u) noexcept
     return __u < 0 ? false : __t == make_unsigned_t<_Up>(__u);
 }
 
-template<__is_safe_integral_cmp _Tp, __is_safe_integral_cmp _Up>
-_LIBCPP_INLINE_VISIBILITY constexpr
-bool cmp_not_equal(_Tp __t, _Up __u) noexcept
-{
-  return !_VSTD::cmp_equal(__t, __u);
+template <__libcpp_integer _Tp, __libcpp_integer _Up>
+_LIBCPP_HIDE_FROM_ABI constexpr bool cmp_not_equal(_Tp __t, _Up __u) noexcept {
+  return !std::cmp_equal(__t, __u);
 }
 
-template<__is_safe_integral_cmp _Tp, __is_safe_integral_cmp _Up>
-_LIBCPP_INLINE_VISIBILITY constexpr
-bool cmp_less(_Tp __t, _Up __u) noexcept
-{
+template <__libcpp_integer _Tp, __libcpp_integer _Up>
+_LIBCPP_HIDE_FROM_ABI constexpr bool cmp_less(_Tp __t, _Up __u) noexcept {
   if constexpr (is_signed_v<_Tp> == is_signed_v<_Up>)
     return __t < __u;
   else if constexpr (is_signed_v<_Tp>)
@@ -74,34 +51,27 @@ bool cmp_less(_Tp __t, _Up __u) noexcept
     return __u < 0 ? false : __t < make_unsigned_t<_Up>(__u);
 }
 
-template<__is_safe_integral_cmp _Tp, __is_safe_integral_cmp _Up>
-_LIBCPP_INLINE_VISIBILITY constexpr
-bool cmp_greater(_Tp __t, _Up __u) noexcept
-{
-  return _VSTD::cmp_less(__u, __t);
+template <__libcpp_integer _Tp, __libcpp_integer _Up>
+_LIBCPP_HIDE_FROM_ABI constexpr bool cmp_greater(_Tp __t, _Up __u) noexcept {
+  return std::cmp_less(__u, __t);
 }
 
-template<__is_safe_integral_cmp _Tp, __is_safe_integral_cmp _Up>
-_LIBCPP_INLINE_VISIBILITY constexpr
-bool cmp_less_equal(_Tp __t, _Up __u) noexcept
-{
-  return !_VSTD::cmp_greater(__t, __u);
+template <__libcpp_integer _Tp, __libcpp_integer _Up>
+_LIBCPP_HIDE_FROM_ABI constexpr bool cmp_less_equal(_Tp __t, _Up __u) noexcept {
+  return !std::cmp_greater(__t, __u);
 }
 
-template<__is_safe_integral_cmp _Tp, __is_safe_integral_cmp _Up>
-_LIBCPP_INLINE_VISIBILITY constexpr
-bool cmp_greater_equal(_Tp __t, _Up __u) noexcept
-{
-  return !_VSTD::cmp_less(__t, __u);
+template <__libcpp_integer _Tp, __libcpp_integer _Up>
+_LIBCPP_HIDE_FROM_ABI constexpr bool cmp_greater_equal(_Tp __t, _Up __u) noexcept {
+  return !std::cmp_less(__t, __u);
 }
 
-template<__is_safe_integral_cmp _Tp, __is_safe_integral_cmp _Up>
-_LIBCPP_INLINE_VISIBILITY constexpr
-bool in_range(_Up __u) noexcept
-{
-  return _VSTD::cmp_less_equal(__u, numeric_limits<_Tp>::max()) &&
-         _VSTD::cmp_greater_equal(__u, numeric_limits<_Tp>::min());
+template <__libcpp_integer _Tp, __libcpp_integer _Up>
+_LIBCPP_HIDE_FROM_ABI constexpr bool in_range(_Up __u) noexcept {
+  return std::cmp_less_equal(__u, numeric_limits<_Tp>::max()) &&
+         std::cmp_greater_equal(__u, numeric_limits<_Tp>::min());
 }
+
 #endif // _LIBCPP_STD_VER >= 20
 
 _LIBCPP_END_NAMESPACE_STD