Update LLVM to 22.1.8

clang/cmake/caches/release_cpack_pre_build_strip_lto.cmake

@@ -1,5 +1,14 @@
 file(GLOB files ${CPACK_TEMPORARY_INSTALL_DIRECTORY}/lib/*.a)
 
+if(CMAKE_SYSTEM_NAME STREQUAL "Darwin")
+  set(strip_command
+    ${CPACK_TEMPORARY_INSTALL_DIRECTORY}/bin/llvm-bitcode-strip)
+  set(strip_args -r)
+else()
+  set(strip_command ${CPACK_TEMPORARY_INSTALL_DIRECTORY}/bin/llvm-strip)
+  set(strip_args --no-strip-all -R .llvm.lto)
+endif()
+
 foreach(file ${files})
-  execute_process(COMMAND ${CPACK_TEMPORARY_INSTALL_DIRECTORY}/bin/llvm-strip --no-strip-all -R .llvm.lto ${file})
+  execute_process(COMMAND ${strip_command} ${strip_args} ${file} -o ${file})
 endforeach()

clang/lib/Sema/SemaConcept.cpp

@@ -381,6 +381,10 @@ class HashParameterMapping : public RecursiveASTVisitor<HashParameterMapping> {
     return true;
   }
 
+  bool TraverseCXXThisExpr(CXXThisExpr *E) {
+    return inherited::TraverseType(E->getType());
+  }
+
   bool TraverseTypeLoc(TypeLoc TL, bool TraverseQualifier = true) {
     // We don't care about TypeLocs. So traverse Types instead.
     return TraverseType(TL.getType().getCanonicalType(), TraverseQualifier);
@@ -394,6 +398,16 @@ class HashParameterMapping : public RecursiveASTVisitor<HashParameterMapping> {
     return true;
   }
 
+  bool TraverseUnresolvedUsingType(UnresolvedUsingType *T,
+                                   bool TraverseQualifier) {
+    // Sometimes the written type doesn't contain a qualifier which contains
+    // necessary template arguments, whereas the declaration does.
+    if (NestedNameSpecifier NNS = T->getDecl()->getQualifier();
+        TraverseQualifier && NNS)
+      return inherited::TraverseNestedNameSpecifier(NNS);
+    return inherited::TraverseUnresolvedUsingType(T, TraverseQualifier);
+  }
+
   bool TraverseInjectedClassNameType(InjectedClassNameType *T,
                                      bool TraverseQualifier) {
     return TraverseTemplateArguments(T->getTemplateArgs(SemaRef.Context));

clang/test/SemaTemplate/concepts-using-decl.cpp

@@ -197,3 +197,101 @@ struct child : base<int> {
 };
 
 }
+
+namespace GH198663 {
+
+template <class T>
+concept HasIsTransparent = requires { typename T::is_transparent; };
+
+template <class K, class V, class Compare>
+struct FlatMapBase {
+    using key_compare = Compare;
+};
+
+template <class K, class V, class Compare>
+struct FlatMap : FlatMapBase<K, V, Compare> {
+    using Base = FlatMapBase<K, V, Compare>;
+
+    using typename Base::key_compare;
+
+    void at(const K&) {}
+    void at(const K&) const {}
+    template <class Other>
+    void at(const Other&)
+        requires HasIsTransparent<key_compare>
+    {}
+    template <class Other>
+    void at(const Other&) const
+        requires HasIsTransparent<key_compare>
+    {}
+};
+
+template <class T>
+struct Transparent {
+    T t;
+};
+
+struct TransparentComparator {
+    using is_transparent = void;
+
+    template <class T>
+    bool operator()(const T&, const Transparent<T>&) const;
+
+    template <class T>
+    bool operator()(const Transparent<T>&, const T& t) const;
+
+    template <class T>
+    bool operator()(const T&, const T&) const;
+};
+
+struct NonTransparentComparator {
+    template <class T>
+    bool operator()(const T&, const Transparent<T>&) const;
+
+    template <class T>
+    bool operator()(const Transparent<T>&, const T&) const;
+
+    template <class T>
+    bool operator()(const T&, const T&) const;
+};
+
+template <class M>
+concept CanAt = requires(M m, Transparent<int> k) { m.at(k); };
+
+using TransparentMap = FlatMap<int, double, TransparentComparator>;
+using NonTransparentMap = FlatMap<int, double, NonTransparentComparator>;
+
+static_assert(CanAt<TransparentMap>);
+
+static_assert(!CanAt<NonTransparentMap>);
+
+}
+
+namespace GH198663_2 {
+
+template<typename T>
+auto mv(T& t) -> T&&;
+
+template<typename S, typename T>
+concept does_foo = requires(S s) {
+	s.template foo<T>();
+};
+
+template<typename S>
+struct type {
+	S member;
+	template<typename T>
+	auto foo() -> T requires does_foo<decltype(mv(member)), T>;
+};
+
+struct returns_int {
+	template<typename T>
+	auto foo() -> T;
+};
+
+struct nothing {};
+
+static_assert(does_foo<type<returns_int>&, int>);
+static_assert(not does_foo<type<nothing>&, int>);
+
+}

cmake/Modules/LLVMVersion.cmake

@@ -7,7 +7,7 @@ if(NOT DEFINED LLVM_VERSION_MINOR)
   set(LLVM_VERSION_MINOR 1)
 endif()
 if(NOT DEFINED LLVM_VERSION_PATCH)
-  set(LLVM_VERSION_PATCH 7)
+  set(LLVM_VERSION_PATCH 8)
 endif()
 if(NOT DEFINED LLVM_VERSION_SUFFIX)
   set(LLVM_VERSION_SUFFIX)

libcxx/include/__config

@@ -30,7 +30,7 @@
 // _LIBCPP_VERSION represents the version of libc++, which matches the version of LLVM.
 // Given a LLVM release LLVM XX.YY.ZZ (e.g. LLVM 17.0.1 == 17.00.01), _LIBCPP_VERSION is
 // defined to XXYYZZ.
-#  define _LIBCPP_VERSION 220107
+#  define _LIBCPP_VERSION 220108
 
 #  define _LIBCPP_CONCAT_IMPL(_X, _Y) _X##_Y
 #  define _LIBCPP_CONCAT(_X, _Y) _LIBCPP_CONCAT_IMPL(_X, _Y)

libcxx/include/optional

@@ -828,6 +828,10 @@ private:
   template <class _Up>
   constexpr static bool __libcpp_opt_ref_ctor_deleted =
       is_lvalue_reference_v<_Tp> && reference_constructs_from_temporary_v<_Tp, _Up>;
+
+  template <class _Up>
+  constexpr static bool __ref_ctor_enabled =
+      is_lvalue_reference_v<_Tp> && !reference_constructs_from_temporary_v<_Tp, _Up>;
 #    endif
 
   // LWG2756: conditionally explicit conversion from _Up
@@ -935,15 +939,15 @@ public:
   template <class _Up, enable_if_t<_CheckOptionalLikeCtor<_Up, _Up const&>::template __enable_implicit<_Up>(), int> = 0>
   _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 optional(const optional<_Up>& __v)
 #    if _LIBCPP_STD_VER >= 26
-      noexcept(is_lvalue_reference_v<_Tp> && is_nothrow_constructible_v<_Tp&, _Up&>)
+      noexcept(is_lvalue_reference_v<_Tp> && is_nothrow_constructible_v<_Tp&, const _Up&>)
 #    endif
   {
     this->__construct_from(__v);
   }
   template <class _Up, enable_if_t<_CheckOptionalLikeCtor<_Up, _Up const&>::template __enable_explicit<_Up>(), int> = 0>
   _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 explicit optional(const optional<_Up>& __v)
 #    if _LIBCPP_STD_VER >= 26
-      noexcept(is_lvalue_reference_v<_Tp> && is_nothrow_constructible_v<_Tp&, _Up&>)
+      noexcept(is_lvalue_reference_v<_Tp> && is_nothrow_constructible_v<_Tp&, const _Up&>)
 #    endif
   {
     this->__construct_from(__v);
@@ -981,25 +985,25 @@ public:
 
   // optional(optional<U>& rhs)
   template <class _Up>
-    requires(!__libcpp_opt_ref_ctor_deleted<_Up>) && (!is_same_v<remove_cvref_t<_Tp>, optional<_Up>>) &&
-            (!is_same_v<_Tp&, _Up>) && is_constructible_v<_Tp&, _Up&>
+    requires __ref_ctor_enabled<_Up&> && (!is_same_v<remove_cvref_t<_Tp>, optional<_Up>>) && (!is_same_v<_Tp&, _Up>) &&
+             is_constructible_v<_Tp&, _Up&>
   _LIBCPP_HIDE_FROM_ABI constexpr explicit(!is_convertible_v<_Up&, _Tp&>)
       optional(optional<_Up>& __rhs) noexcept(is_nothrow_constructible_v<_Tp&, _Up&>) {
     this->__construct_from(__rhs);
   }
 
   template <class _Up>
-    requires __libcpp_opt_ref_ctor_deleted<_Up> && (!is_same_v<remove_cvref_t<_Tp>, optional<_Up>>) &&
+    requires __libcpp_opt_ref_ctor_deleted<_Up&> && (!is_same_v<remove_cvref_t<_Tp>, optional<_Up>>) &&
                  (!is_same_v<_Tp&, _Up>) && is_constructible_v<_Tp&, _Up&>
   constexpr explicit optional(optional<_Up>& __rhs) noexcept = delete;
 
   // optional(const optional<U>&)
   template <class _Up, enable_if_t<_CheckOptionalLikeCtor<_Up, _Up const&>::template __enable_implicit<_Up>(), int> = 0>
-    requires __libcpp_opt_ref_ctor_deleted<_Up>
+    requires __libcpp_opt_ref_ctor_deleted<const _Up&>
   optional(const optional<_Up>&) = delete;
 
   template <class _Up, enable_if_t<_CheckOptionalLikeCtor<_Up, _Up const&>::template __enable_explicit<_Up>(), int> = 0>
-    requires __libcpp_opt_ref_ctor_deleted<_Up>
+    requires __libcpp_opt_ref_ctor_deleted<const _Up&>
   explicit optional(const optional<_Up>&) = delete;
 
   // optional(optional<U>&&)
@@ -1013,16 +1017,16 @@ public:
 
   // optional(const optional<U>&&)
   template <class _Up>
-    requires(!__libcpp_opt_ref_ctor_deleted<_Up>) && (!is_same_v<remove_cvref_t<_Tp>, optional<_Up>>) &&
-            (!is_same_v<_Tp&, _Up>) && is_constructible_v<_Tp&, _Up>
+    requires __ref_ctor_enabled<const _Up> && (!is_same_v<remove_cvref_t<_Tp>, optional<_Up>>) &&
+             (!is_same_v<_Tp&, _Up>) && is_constructible_v<_Tp&, const _Up>
   _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 explicit(!is_convertible_v<const _Up, _Tp&>)
       optional(const optional<_Up>&& __v) noexcept(is_nothrow_constructible_v<_Tp&, const _Up>) {
     this->__construct_from(std::move(__v));
   }
 
   template <class _Up>
-    requires __libcpp_opt_ref_ctor_deleted<_Up> && (!is_same_v<remove_cvref_t<_Tp>, optional<_Up>>) &&
-                 (!is_same_v<_Tp&, _Up>) && is_constructible_v<_Tp&, _Up>
+    requires __libcpp_opt_ref_ctor_deleted<const _Up> && (!is_same_v<remove_cvref_t<_Tp>, optional<_Up>>) &&
+                 (!is_same_v<_Tp&, _Up>) && is_constructible_v<_Tp&, const _Up>
   _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 optional(const optional<_Up>&& __v) noexcept = delete;
 #    endif
 

libcxx/test/std/utilities/optional/optional.object/optional.object.ctor/const_optional_U.pass.cpp

@@ -151,6 +151,37 @@ constexpr bool test_ref() {
     assert(*o2 == 1);
   }
 
+  {
+    const std::optional<int> o1{2};
+    std::optional<const int&> o2(o1);
+    assert(*o2 == 2);
+    assert(&(*o2) == &(*o1));
+  }
+
+  {
+    const std::optional<ReferenceConversion<int>> o1({1, 2});
+    std::optional<const int&> o2(o1);
+    assert(o2.has_value());
+    assert(&(*o2) == &o1->lvalue);
+    assert(*o2 == 1);
+  }
+
+  {
+    const std::optional<ReferenceConversion<int>> o1({1, 2});
+    std::optional<const int&> o2(std::move(o1));
+    assert(o2.has_value());
+    assert(&(*o2) == &o1->rvalue);
+    assert(*o2 == 2);
+  }
+
+  {
+    const std::optional<ReferenceConversionThrows<int>> o1({1, 2});
+    ASSERT_NOT_NOEXCEPT(std::optional<const int&>(o1));
+    ASSERT_NOT_NOEXCEPT(std::optional<const int&>(std::move(o1)));
+  }
+
+  static_assert(!std::is_constructible_v<std::optional<int>, const std::optional<ConstRValueOnly<int>>&&>);
+
   return true;
 }
 #endif

libcxx/test/std/utilities/optional/optional.object/optional.object.ctor/optional_U.pass.cpp

@@ -144,6 +144,36 @@ constexpr bool test_ref() {
     assert(*o2 == 1);
   }
 
+  {
+    std::optional<int> o1(1);
+    std::optional<const int&> o2(o1);
+    assert(o2.has_value());
+    assert(*o2 == 1);
+    assert(&(*o2) == &(*o1));
+  }
+
+  {
+    std::optional<ReferenceConversion<int>> o1({1, 2});
+    std::optional<const int&> o2(o1);
+    assert(o2.has_value());
+    assert(*o2 == 1);
+    assert(&(*o2) == &o1->lvalue);
+  }
+
+  {
+    std::optional<ReferenceConversion<int>> o1({1, 2});
+    std::optional<const int&> o2(std::move(o1));
+    assert(o2.has_value());
+    assert(*o2 == 2);
+    assert(&(*o2) == &o1->rvalue);
+  }
+
+  {
+    std::optional<ReferenceConversionThrows<int>> o1({1, 2});
+    ASSERT_NOT_NOEXCEPT(std::optional<const int&>(o1));
+    ASSERT_NOT_NOEXCEPT(std::optional<const int&>(std::move(o1)));
+  }
+
   return true;
 }
 #endif
@@ -164,6 +194,11 @@ int main(int, char**) {
     test<Z>(std::move(rhs), true);
   }
 
+#if TEST_STD_VER >= 26
+  // GH: #194415
+  static_assert(!std::is_constructible_v<std::optional<int>, std::optional<LValueOnly<int>>&>);
+#endif
+
   static_assert(!(std::is_constructible<optional<X>, optional<Z>>::value), "");
 
 #if TEST_STD_VER >= 26

libcxx/test/std/utilities/optional/optional.object/optional.object.ctor/ref_constructs_from_temporary.verify.cpp

@@ -29,12 +29,10 @@ void test() {
   const std::optional<int> co(1);
   std::optional<int> o0(1);
 
-  // expected-error-re@*:* 10 {{call to deleted constructor of 'std::optional<{{.*}}>'}}
+  // expected-error-re@*:* 8 {{call to deleted constructor of 'std::optional<{{.*}}>'}}
   std::optional<const int&> o1{1};             // optional(U&&)
-  std::optional<const int&> o2{o0};            // optional(optional<U>&)
-  std::optional<const int&> o3{co};            // optional(const optional<U>&)
-  std::optional<const int&> o4{std::move(o0)}; // optional(optional<U>&&&)
-  std::optional<const int&> o5{std::move(co)}; // optional(optional<U>&&&)
+  std::optional<const int&> o4{std::move(o0)}; // optional(optional<U>&&)
+  std::optional<const int&> o5{std::move(co)}; // optional(optional<U>&&)
 
   std::optional<const X&> o6{1};              // optional(U&&)
   std::optional<const X&> o7{o0};             // optional(optional<U>&)