diff --git a/clang-tools-extra/clangd/unittests/FindTargetTests.cpp b/clang-tools-extra/clangd/unittests/FindTargetTests.cpp
index 799a549ff0816e..88aae2729904f4 100644
--- a/clang-tools-extra/clangd/unittests/FindTargetTests.cpp
+++ b/clang-tools-extra/clangd/unittests/FindTargetTests.cpp
@@ -839,7 +839,9 @@ TEST_F(TargetDeclTest, OverloadExpr) {
       [[delete]] x;
     }
   )cpp";
-  EXPECT_DECLS("CXXDeleteExpr", "void operator delete(void *) noexcept");
+  // Sized deallocation is enabled by default in C++14 onwards.
+  EXPECT_DECLS("CXXDeleteExpr",
+               "void operator delete(void *, unsigned long) noexcept");
 }
 
 TEST_F(TargetDeclTest, DependentExprs) {
diff --git a/clang-tools-extra/test/clang-tidy/checkers/misc/new-delete-overloads.cpp b/clang-tools-extra/test/clang-tidy/checkers/misc/new-delete-overloads.cpp
index 78f021144b2e19..f86fe8a4c5b14f 100644
--- a/clang-tools-extra/test/clang-tidy/checkers/misc/new-delete-overloads.cpp
+++ b/clang-tools-extra/test/clang-tidy/checkers/misc/new-delete-overloads.cpp
@@ -12,16 +12,6 @@ struct S {
 // CHECK-MESSAGES: :[[@LINE+1]]:7: warning: declaration of 'operator new' has no matching declaration of 'operator delete' at the same scope
 void *operator new(size_t size) noexcept(false);
 
-struct T {
-  // Sized deallocations are not enabled by default, and so this new/delete pair
-  // does not match. However, we expect only one warning, for the new, because
-  // the operator delete is a placement delete and we do not warn on mismatching
-  // placement operations.
-  // CHECK-MESSAGES: :[[@LINE+1]]:9: warning: declaration of 'operator new' has no matching declaration of 'operator delete' at the same scope
-  void *operator new(size_t size) noexcept;
-  void operator delete(void *ptr, size_t) noexcept; // ok only if sized deallocation is enabled
-};
-
 struct U {
   void *operator new(size_t size) noexcept;
   void operator delete(void *ptr) noexcept;
diff --git a/clang/docs/ReleaseNotes.rst b/clang/docs/ReleaseNotes.rst
index 7bea43ec64f062..5525cd832c0889 100644
--- a/clang/docs/ReleaseNotes.rst
+++ b/clang/docs/ReleaseNotes.rst
@@ -90,6 +90,11 @@ C++ Language Changes
 --------------------
 - Implemented ``_BitInt`` literal suffixes ``__wb`` or ``__WB`` as a Clang extension with ``unsigned`` modifiers also allowed. (#GH85223).
 
+C++14 Feature Support
+^^^^^^^^^^^^^^^^^^^^^
+- Sized deallocation is enabled by default in C++14 onwards. The user may specify
+  ``-fno-sized-deallocation`` to disable it if there are some regressions.
+
 C++20 Feature Support
 ^^^^^^^^^^^^^^^^^^^^^
 
diff --git a/clang/include/clang/Driver/Options.td b/clang/include/clang/Driver/Options.td
index 922bda721dc780..e806c437f7d9f0 100644
--- a/clang/include/clang/Driver/Options.td
+++ b/clang/include/clang/Driver/Options.td
@@ -603,6 +603,7 @@ class MarshallingInfoVisibility<KeyPathAndMacro kpm, code default>
 // Key paths that are constant during parsing of options with the same key path prefix.
 defvar cplusplus = LangOpts<"CPlusPlus">;
 defvar cpp11 = LangOpts<"CPlusPlus11">;
+defvar cpp14 = LangOpts<"CPlusPlus14">;
 defvar cpp17 = LangOpts<"CPlusPlus17">;
 defvar cpp20 = LangOpts<"CPlusPlus20">;
 defvar c99 = LangOpts<"C99">;
@@ -3365,10 +3366,9 @@ defm relaxed_template_template_args : BoolFOption<"relaxed-template-template-arg
           "Enable C++17 relaxed template template argument matching">,
   NegFlag<SetFalse>>;
 defm sized_deallocation : BoolFOption<"sized-deallocation",
-  LangOpts<"SizedDeallocation">, DefaultFalse,
-  PosFlag<SetTrue, [], [ClangOption, CC1Option],
-          "Enable C++14 sized global deallocation functions">,
-  NegFlag<SetFalse>>;
+  LangOpts<"SizedDeallocation">, Default<cpp14.KeyPath>,
+  PosFlag<SetTrue, [], [], "Enable C++14 sized global deallocation functions">,
+  NegFlag<SetFalse>, BothFlags<[], [ClangOption, CC1Option]>>;
 defm aligned_allocation : BoolFOption<"aligned-allocation",
   LangOpts<"AlignedAllocation">, Default<cpp17.KeyPath>,
   PosFlag<SetTrue, [], [ClangOption], "Enable C++17 aligned allocation functions">,
diff --git a/clang/lib/Driver/ToolChains/Clang.cpp b/clang/lib/Driver/ToolChains/Clang.cpp
index 5f5d720cf759f4..94f2af8d9ac550 100644
--- a/clang/lib/Driver/ToolChains/Clang.cpp
+++ b/clang/lib/Driver/ToolChains/Clang.cpp
@@ -7294,10 +7294,15 @@ void Clang::ConstructJob(Compilation &C, const JobAction &JA,
   Args.addOptInFlag(CmdArgs, options::OPT_frelaxed_template_template_args,
                     options::OPT_fno_relaxed_template_template_args);
 
-  // -fsized-deallocation is off by default, as it is an ABI-breaking change for
-  // most platforms.
-  Args.addOptInFlag(CmdArgs, options::OPT_fsized_deallocation,
-                    options::OPT_fno_sized_deallocation);
+  // -fsized-deallocation is on by default in C++14 onwards and otherwise off
+  // by default.
+  if (Arg *A = Args.getLastArg(options::OPT_fsized_deallocation,
+                               options::OPT_fno_sized_deallocation)) {
+    if (A->getOption().matches(options::OPT_fno_sized_deallocation))
+      CmdArgs.push_back("-fno-sized-deallocation");
+    else
+      CmdArgs.push_back("-fsized-deallocation");
+  }
 
   // -faligned-allocation is on by default in C++17 onwards and otherwise off
   // by default.
diff --git a/clang/lib/Driver/ToolChains/Darwin.cpp b/clang/lib/Driver/ToolChains/Darwin.cpp
index caf6c4a444fdce..593b403a1e3f05 100644
--- a/clang/lib/Driver/ToolChains/Darwin.cpp
+++ b/clang/lib/Driver/ToolChains/Darwin.cpp
@@ -2912,9 +2912,54 @@ static bool sdkSupportsBuiltinModules(const Darwin::DarwinPlatformKind &TargetPl
   }
 }
 
-void Darwin::addClangTargetOptions(const llvm::opt::ArgList &DriverArgs,
-                                   llvm::opt::ArgStringList &CC1Args,
-                                   Action::OffloadKind DeviceOffloadKind) const {
+static inline llvm::VersionTuple
+sizedDeallocMinVersion(llvm::Triple::OSType OS) {
+  switch (OS) {
+  default:
+    break;
+  case llvm::Triple::Darwin:
+  case llvm::Triple::MacOSX: // Earliest supporting version is 10.12.
+    return llvm::VersionTuple(10U, 12U);
+  case llvm::Triple::IOS:
+  case llvm::Triple::TvOS: // Earliest supporting version is 10.0.0.
+    return llvm::VersionTuple(10U);
+  case llvm::Triple::WatchOS: // Earliest supporting version is 3.0.0.
+    return llvm::VersionTuple(3U);
+  }
+
+  llvm_unreachable("Unexpected OS");
+}
+
+bool Darwin::isSizedDeallocationUnavailable() const {
+  llvm::Triple::OSType OS;
+
+  if (isTargetMacCatalyst())
+    return TargetVersion < sizedDeallocMinVersion(llvm::Triple::MacOSX);
+  switch (TargetPlatform) {
+  case MacOS: // Earlier than 10.12.
+    OS = llvm::Triple::MacOSX;
+    break;
+  case IPhoneOS:
+    OS = llvm::Triple::IOS;
+    break;
+  case TvOS: // Earlier than 10.0.
+    OS = llvm::Triple::TvOS;
+    break;
+  case WatchOS: // Earlier than 3.0.
+    OS = llvm::Triple::WatchOS;
+    break;
+  case DriverKit:
+  case XROS:
+    // Always available.
+    return false;
+  }
+
+  return TargetVersion < sizedDeallocMinVersion(OS);
+}
+
+void Darwin::addClangTargetOptions(
+    const llvm::opt::ArgList &DriverArgs, llvm::opt::ArgStringList &CC1Args,
+    Action::OffloadKind DeviceOffloadKind) const {
   // Pass "-faligned-alloc-unavailable" only when the user hasn't manually
   // enabled or disabled aligned allocations.
   if (!DriverArgs.hasArgNoClaim(options::OPT_faligned_allocation,
@@ -2922,6 +2967,13 @@ void Darwin::addClangTargetOptions(const llvm::opt::ArgList &DriverArgs,
       isAlignedAllocationUnavailable())
     CC1Args.push_back("-faligned-alloc-unavailable");
 
+  // Pass "-fno-sized-deallocation" only when the user hasn't manually enabled
+  // or disabled sized deallocations.
+  if (!DriverArgs.hasArgNoClaim(options::OPT_fsized_deallocation,
+                                options::OPT_fno_sized_deallocation) &&
+      isSizedDeallocationUnavailable())
+    CC1Args.push_back("-fno-sized-deallocation");
+
   addClangCC1ASTargetOptions(DriverArgs, CC1Args);
 
   // Enable compatibility mode for NSItemProviderCompletionHandler in
diff --git a/clang/lib/Driver/ToolChains/Darwin.h b/clang/lib/Driver/ToolChains/Darwin.h
index 10d4b69e5d5f10..b45279ecedeb25 100644
--- a/clang/lib/Driver/ToolChains/Darwin.h
+++ b/clang/lib/Driver/ToolChains/Darwin.h
@@ -511,6 +511,10 @@ class LLVM_LIBRARY_VISIBILITY Darwin : public MachO {
   /// targeting.
   bool isAlignedAllocationUnavailable() const;
 
+  /// Return true if c++14 sized deallocation functions are not implemented in
+  /// the c++ standard library of the deployment target we are targeting.
+  bool isSizedDeallocationUnavailable() const;
+
   void addClangTargetOptions(const llvm::opt::ArgList &DriverArgs,
                              llvm::opt::ArgStringList &CC1Args,
                              Action::OffloadKind DeviceOffloadKind) const override;
diff --git a/clang/lib/Driver/ToolChains/ZOS.cpp b/clang/lib/Driver/ToolChains/ZOS.cpp
index d5fc7b8ef562a6..074e0556ecd2ad 100644
--- a/clang/lib/Driver/ToolChains/ZOS.cpp
+++ b/clang/lib/Driver/ToolChains/ZOS.cpp
@@ -36,6 +36,12 @@ void ZOS::addClangTargetOptions(const ArgList &DriverArgs,
   if (!DriverArgs.hasArgNoClaim(options::OPT_faligned_allocation,
                                 options::OPT_fno_aligned_allocation))
     CC1Args.push_back("-faligned-alloc-unavailable");
+
+  // Pass "-fno-sized-deallocation" only when the user hasn't manually enabled
+  // or disabled sized deallocations.
+  if (!DriverArgs.hasArgNoClaim(options::OPT_fsized_deallocation,
+                                options::OPT_fno_sized_deallocation))
+    CC1Args.push_back("-fno-sized-deallocation");
 }
 
 void zos::Assembler::ConstructJob(Compilation &C, const JobAction &JA,
diff --git a/clang/test/AST/ast-dump-expr-json.cpp b/clang/test/AST/ast-dump-expr-json.cpp
index 0fb07b0b434cc3..bdd5ea19e41835 100644
--- a/clang/test/AST/ast-dump-expr-json.cpp
+++ b/clang/test/AST/ast-dump-expr-json.cpp
@@ -2333,7 +2333,7 @@ void TestNonADLCall3() {
 // CHECK-NEXT:         "kind": "FunctionDecl",
 // CHECK-NEXT:         "name": "operator delete",
 // CHECK-NEXT:         "type": {
-// CHECK-NEXT:          "qualType": "void (void *) noexcept"
+// CHECK-NEXT:          "qualType": "void (void *, unsigned long) noexcept"
 // CHECK-NEXT:         }
 // CHECK-NEXT:        },
 // CHECK-NEXT:        "inner": [
diff --git a/clang/test/AST/ast-dump-expr.cpp b/clang/test/AST/ast-dump-expr.cpp
index 69e65e22d61d0d..de88f29bc4b0a9 100644
--- a/clang/test/AST/ast-dump-expr.cpp
+++ b/clang/test/AST/ast-dump-expr.cpp
@@ -164,7 +164,7 @@ void UnaryExpressions(int *p) {
   // CHECK-NEXT: DeclRefExpr 0x{{[^ ]*}} <col:8> 'int *' lvalue ParmVar 0x{{[^ ]*}} 'p' 'int *'
 
   ::delete p;
-  // CHECK: CXXDeleteExpr 0x{{[^ ]*}} <line:[[@LINE-1]]:3, col:12> 'void' global Function 0x{{[^ ]*}} 'operator delete' 'void (void *) noexcept'
+  // CHECK: CXXDeleteExpr 0x{{[^ ]*}} <line:[[@LINE-1]]:3, col:12> 'void' global Function 0x{{[^ ]*}} 'operator delete' 'void (void *, unsigned long) noexcept'
   // CHECK-NEXT: ImplicitCastExpr
   // CHECK-NEXT: DeclRefExpr 0x{{[^ ]*}} <col:12> 'int *' lvalue ParmVar 0x{{[^ ]*}} 'p' 'int *'
 
diff --git a/clang/test/AST/ast-dump-stmt-json.cpp b/clang/test/AST/ast-dump-stmt-json.cpp
index 667a12a0120244..a473d17da94244 100644
--- a/clang/test/AST/ast-dump-stmt-json.cpp
+++ b/clang/test/AST/ast-dump-stmt-json.cpp
@@ -994,7 +994,7 @@ void TestDependentGenericSelectionExpr(Ty T) {
 // CHECK-NEXT:       "kind": "FunctionDecl",
 // CHECK-NEXT:       "name": "operator delete",
 // CHECK-NEXT:       "type": {
-// CHECK-NEXT:        "qualType": "void (void *) noexcept"
+// CHECK-NEXT:        "qualType": "void (void *, unsigned long) noexcept"
 // CHECK-NEXT:       }
 // CHECK-NEXT:      },
 // CHECK-NEXT:      "inner": [
@@ -1369,7 +1369,7 @@ void TestDependentGenericSelectionExpr(Ty T) {
 // CHECK-NEXT:       "kind": "FunctionDecl",
 // CHECK-NEXT:       "name": "operator delete",
 // CHECK-NEXT:       "type": {
-// CHECK-NEXT:        "qualType": "void (void *) noexcept"
+// CHECK-NEXT:        "qualType": "void (void *, unsigned long) noexcept"
 // CHECK-NEXT:       }
 // CHECK-NEXT:      },
 // CHECK-NEXT:      "inner": [
@@ -1722,7 +1722,6 @@ void TestDependentGenericSelectionExpr(Ty T) {
 // CHECK-NEXT:   "end": {}
 // CHECK-NEXT:  },
 // CHECK-NEXT:  "isImplicit": true,
-// CHECK-NEXT:  "isUsed": true,
 // CHECK-NEXT:  "name": "operator delete",
 // CHECK-NEXT:  "mangledName": "_ZdlPv",
 // CHECK-NEXT:  "type": {
@@ -1810,6 +1809,126 @@ void TestDependentGenericSelectionExpr(Ty T) {
 // CHECK-NEXT: }
 
 
+// CHECK-NOT: {{^}}Dumping
+// CHECK:  "kind": "FunctionDecl",
+// CHECK-NEXT:  "loc": {},
+// CHECK-NEXT:  "range": {
+// CHECK-NEXT:   "begin": {},
+// CHECK-NEXT:   "end": {}
+// CHECK-NEXT:  },
+// CHECK-NEXT:  "isImplicit": true,
+// CHECK-NEXT:  "isUsed": true,
+// CHECK-NEXT:  "name": "operator delete",
+// CHECK-NEXT:  "mangledName": "_ZdlPvm",
+// CHECK-NEXT:  "type": {
+// CHECK-NEXT:   "qualType": "void (void *, unsigned long) noexcept"
+// CHECK-NEXT:  },
+// CHECK-NEXT:  "inner": [
+// CHECK-NEXT:   {
+// CHECK-NEXT:    "id": "0x{{.*}}",
+// CHECK-NEXT:    "kind": "ParmVarDecl",
+// CHECK-NEXT:    "loc": {},
+// CHECK-NEXT:    "range": {
+// CHECK-NEXT:     "begin": {},
+// CHECK-NEXT:     "end": {}
+// CHECK-NEXT:    },
+// CHECK-NEXT:    "isImplicit": true,
+// CHECK-NEXT:    "type": {
+// CHECK-NEXT:     "qualType": "void *"
+// CHECK-NEXT:    }
+// CHECK-NEXT:   },
+// CHECK-NEXT:   {
+// CHECK-NEXT:    "id": "0x{{.*}}",
+// CHECK-NEXT:    "kind": "ParmVarDecl",
+// CHECK-NEXT:    "loc": {},
+// CHECK-NEXT:    "range": {
+// CHECK-NEXT:     "begin": {},
+// CHECK-NEXT:     "end": {}
+// CHECK-NEXT:    },
+// CHECK-NEXT:    "isImplicit": true,
+// CHECK-NEXT:    "type": {
+// CHECK-NEXT:     "qualType": "unsigned long"
+// CHECK-NEXT:    }
+// CHECK-NEXT:   },
+// CHECK-NEXT:   {
+// CHECK-NEXT:    "id": "0x{{.*}}",
+// CHECK-NEXT:    "kind": "VisibilityAttr",
+// CHECK-NEXT:    "range": {
+// CHECK-NEXT:     "begin": {},
+// CHECK-NEXT:     "end": {}
+// CHECK-NEXT:    },
+// CHECK-NEXT:    "implicit": true,
+// CHECK-NEXT:    "visibility": "default"
+// CHECK-NEXT:   }
+// CHECK-NEXT:  ]
+// CHECK-NEXT: }
+
+// CHECK-NOT: {{^}}Dumping
+// CHECK:  "kind": "FunctionDecl",
+// CHECK-NEXT:  "loc": {},
+// CHECK-NEXT:  "range": {
+// CHECK-NEXT:   "begin": {},
+// CHECK-NEXT:   "end": {}
+// CHECK-NEXT:  },
+// CHECK-NEXT:  "isImplicit": true,
+// CHECK-NEXT:  "name": "operator delete",
+// CHECK-NEXT:  "mangledName": "_ZdlPvmSt11align_val_t",
+// CHECK-NEXT:  "type": {
+// CHECK-NEXT:   "qualType": "void (void *, unsigned long, std::align_val_t) noexcept"
+// CHECK-NEXT:  },
+// CHECK-NEXT:  "inner": [
+// CHECK-NEXT:   {
+// CHECK-NEXT:    "id": "0x{{.*}}",
+// CHECK-NEXT:    "kind": "ParmVarDecl",
+// CHECK-NEXT:    "loc": {},
+// CHECK-NEXT:    "range": {
+// CHECK-NEXT:     "begin": {},
+// CHECK-NEXT:     "end": {}
+// CHECK-NEXT:    },
+// CHECK-NEXT:    "isImplicit": true,
+// CHECK-NEXT:    "type": {
+// CHECK-NEXT:     "qualType": "void *"
+// CHECK-NEXT:    }
+// CHECK-NEXT:   },
+// CHECK-NEXT:   {
+// CHECK-NEXT:    "id": "0x{{.*}}",
+// CHECK-NEXT:    "kind": "ParmVarDecl",
+// CHECK-NEXT:    "loc": {},
+// CHECK-NEXT:    "range": {
+// CHECK-NEXT:     "begin": {},
+// CHECK-NEXT:     "end": {}
+// CHECK-NEXT:    },
+// CHECK-NEXT:    "isImplicit": true,
+// CHECK-NEXT:    "type": {
+// CHECK-NEXT:     "qualType": "unsigned long"
+// CHECK-NEXT:    }
+// CHECK-NEXT:   },
+// CHECK-NEXT:   {
+// CHECK-NEXT:    "id": "0x{{.*}}",
+// CHECK-NEXT:    "kind": "ParmVarDecl",
+// CHECK-NEXT:    "loc": {},
+// CHECK-NEXT:    "range": {
+// CHECK-NEXT:     "begin": {},
+// CHECK-NEXT:     "end": {}
+// CHECK-NEXT:    },
+// CHECK-NEXT:    "isImplicit": true,
+// CHECK-NEXT:    "type": {
+// CHECK-NEXT:     "qualType": "std::align_val_t"
+// CHECK-NEXT:    }
+// CHECK-NEXT:   },
+// CHECK-NEXT:   {
+// CHECK-NEXT:    "id": "0x{{.*}}",
+// CHECK-NEXT:    "kind": "VisibilityAttr",
+// CHECK-NEXT:    "range": {
+// CHECK-NEXT:     "begin": {},
+// CHECK-NEXT:     "end": {}
+// CHECK-NEXT:    },
+// CHECK-NEXT:    "implicit": true,
+// CHECK-NEXT:    "visibility": "default"
+// CHECK-NEXT:   }
+// CHECK-NEXT:  ]
+// CHECK-NEXT: }
+
 // CHECK-NOT: {{^}}Dumping
 // CHECK:  "kind": "FunctionDecl",
 // CHECK-NEXT:  "loc": {},
@@ -1906,6 +2025,125 @@ void TestDependentGenericSelectionExpr(Ty T) {
 // CHECK-NEXT: }
 
 
+// CHECK-NOT: {{^}}Dumping
+// CHECK:  "kind": "FunctionDecl",
+// CHECK-NEXT:  "loc": {},
+// CHECK-NEXT:  "range": {
+// CHECK-NEXT:   "begin": {},
+// CHECK-NEXT:   "end": {}
+// CHECK-NEXT:  },
+// CHECK-NEXT:  "isImplicit": true,
+// CHECK-NEXT:  "name": "operator delete[]",
+// CHECK-NEXT:  "mangledName": "_ZdaPvm",
+// CHECK-NEXT:  "type": {
+// CHECK-NEXT:   "qualType": "void (void *, unsigned long) noexcept"
+// CHECK-NEXT:  },
+// CHECK-NEXT:  "inner": [
+// CHECK-NEXT:   {
+// CHECK-NEXT:    "id": "0x{{.*}}",
+// CHECK-NEXT:    "kind": "ParmVarDecl",
+// CHECK-NEXT:    "loc": {},
+// CHECK-NEXT:    "range": {
+// CHECK-NEXT:     "begin": {},
+// CHECK-NEXT:     "end": {}
+// CHECK-NEXT:    },
+// CHECK-NEXT:    "isImplicit": true,
+// CHECK-NEXT:    "type": {
+// CHECK-NEXT:     "qualType": "void *"
+// CHECK-NEXT:    }
+// CHECK-NEXT:   },
+// CHECK-NEXT:   {
+// CHECK-NEXT:    "id": "0x{{.*}}",
+// CHECK-NEXT:    "kind": "ParmVarDecl",
+// CHECK-NEXT:    "loc": {},
+// CHECK-NEXT:    "range": {
+// CHECK-NEXT:     "begin": {},
+// CHECK-NEXT:     "end": {}
+// CHECK-NEXT:    },
+// CHECK-NEXT:    "isImplicit": true,
+// CHECK-NEXT:    "type": {
+// CHECK-NEXT:     "qualType": "unsigned long"
+// CHECK-NEXT:    }
+// CHECK-NEXT:   },
+// CHECK-NEXT:   {
+// CHECK-NEXT:    "id": "0x{{.*}}",
+// CHECK-NEXT:    "kind": "VisibilityAttr",
+// CHECK-NEXT:    "range": {
+// CHECK-NEXT:     "begin": {},
+// CHECK-NEXT:     "end": {}
+// CHECK-NEXT:    },
+// CHECK-NEXT:    "implicit": true,
+// CHECK-NEXT:    "visibility": "default"
+// CHECK-NEXT:   }
+// CHECK-NEXT:  ]
+// CHECK-NEXT: }
+
+// CHECK-NOT: {{^}}Dumping
+// CHECK:  "kind": "FunctionDecl",
+// CHECK-NEXT:  "loc": {},
+// CHECK-NEXT:  "range": {
+// CHECK-NEXT:   "begin": {},
+// CHECK-NEXT:   "end": {}
+// CHECK-NEXT:  },
+// CHECK-NEXT:  "isImplicit": true,
+// CHECK-NEXT:  "name": "operator delete[]",
+// CHECK-NEXT:  "mangledName": "_ZdaPvmSt11align_val_t",
+// CHECK-NEXT:  "type": {
+// CHECK-NEXT:   "qualType": "void (void *, unsigned long, std::align_val_t) noexcept"
+// CHECK-NEXT:  },
+// CHECK-NEXT:  "inner": [
+// CHECK-NEXT:   {
+// CHECK-NEXT:    "id": "0x{{.*}}",
+// CHECK-NEXT:    "kind": "ParmVarDecl",
+// CHECK-NEXT:    "loc": {},
+// CHECK-NEXT:    "range": {
+// CHECK-NEXT:     "begin": {},
+// CHECK-NEXT:     "end": {}
+// CHECK-NEXT:    },
+// CHECK-NEXT:    "isImplicit": true,
+// CHECK-NEXT:    "type": {
+// CHECK-NEXT:     "qualType": "void *"
+// CHECK-NEXT:    }
+// CHECK-NEXT:   },
+// CHECK-NEXT:   {
+// CHECK-NEXT:    "id": "0x{{.*}}",
+// CHECK-NEXT:    "kind": "ParmVarDecl",
+// CHECK-NEXT:    "loc": {},
+// CHECK-NEXT:    "range": {
+// CHECK-NEXT:     "begin": {},
+// CHECK-NEXT:     "end": {}
+// CHECK-NEXT:    },
+// CHECK-NEXT:    "isImplicit": true,
+// CHECK-NEXT:    "type": {
+// CHECK-NEXT:     "qualType": "unsigned long"
+// CHECK-NEXT:    }
+// CHECK-NEXT:   },
+// CHECK-NEXT:   {
+// CHECK-NEXT:    "id": "0x{{.*}}",
+// CHECK-NEXT:    "kind": "ParmVarDecl",
+// CHECK-NEXT:    "loc": {},
+// CHECK-NEXT:    "range": {
+// CHECK-NEXT:     "begin": {},
+// CHECK-NEXT:     "end": {}
+// CHECK-NEXT:    },
+// CHECK-NEXT:    "isImplicit": true,
+// CHECK-NEXT:    "type": {
+// CHECK-NEXT:     "qualType": "std::align_val_t"
+// CHECK-NEXT:    }
+// CHECK-NEXT:   },
+// CHECK-NEXT:   {
+// CHECK-NEXT:    "id": "0x{{.*}}",
+// CHECK-NEXT:    "kind": "VisibilityAttr",
+// CHECK-NEXT:    "range": {
+// CHECK-NEXT:     "begin": {},
+// CHECK-NEXT:     "end": {}
+// CHECK-NEXT:    },
+// CHECK-NEXT:    "implicit": true,
+// CHECK-NEXT:    "visibility": "default"
+// CHECK-NEXT:   }
+// CHECK-NEXT:  ]
+// CHECK-NEXT: }
+
 // CHECK-NOT: {{^}}Dumping
 // CHECK:  "kind": "FunctionTemplateDecl",
 // CHECK-NEXT:  "loc": {
diff --git a/clang/test/Analysis/cxxnewexpr-callback.cpp b/clang/test/Analysis/cxxnewexpr-callback.cpp
index fe7a9fffad93db..7df58cfa9ca284 100644
--- a/clang/test/Analysis/cxxnewexpr-callback.cpp
+++ b/clang/test/Analysis/cxxnewexpr-callback.cpp
@@ -9,7 +9,7 @@ void free(void *);
 } // namespace std
 
 void *operator new(size_t size) { return std::malloc(size); }
-void operator delete(void *ptr) { std::free(ptr); }
+void operator delete(void *ptr, size_t size) { std::free(ptr); }
 
 struct S {
   S() {}
@@ -49,7 +49,7 @@ void test() {
 // CHECK-NEXT: PostCall (operator delete)
 }
 
-void operator delete(void *ptr) {
+void operator delete(void *ptr, size_t size) {
   std::free(ptr);
 // CHECK-NO-INLINE-NEXT: PreCall (std::free)
 // CHECK-NO-INLINE-NEXT: PostCall (std::free)
diff --git a/clang/test/CXX/basic/basic.stc/basic.stc.dynamic/basic.stc.dynamic.deallocation/p2.cpp b/clang/test/CXX/basic/basic.stc/basic.stc.dynamic/basic.stc.dynamic.deallocation/p2.cpp
index 9e3210c6650f7b..706549f56c52f4 100644
--- a/clang/test/CXX/basic/basic.stc/basic.stc.dynamic/basic.stc.dynamic.deallocation/p2.cpp
+++ b/clang/test/CXX/basic/basic.stc/basic.stc.dynamic/basic.stc.dynamic.deallocation/p2.cpp
@@ -1,4 +1,4 @@
-// RUN: %clang_cc1 -std=c++1z -fsized-deallocation -fexceptions -verify %s
+// RUN: %clang_cc1 -std=c++1z -fexceptions -verify %s
 
 using size_t = decltype(sizeof(0));
 
diff --git a/clang/test/CXX/drs/cwg292.cpp b/clang/test/CXX/drs/cwg292.cpp
index b05d3b92d6275f..a7bcbe6f50519d 100644
--- a/clang/test/CXX/drs/cwg292.cpp
+++ b/clang/test/CXX/drs/cwg292.cpp
@@ -1,10 +1,10 @@
-// RUN: %clang_cc1 -std=c++98 %s -triple x86_64-linux-gnu -emit-llvm -disable-llvm-passes -o - -fexceptions -fcxx-exceptions -pedantic-errors | llvm-cxxfilt -n | FileCheck %s --check-prefixes CHECK
-// RUN: %clang_cc1 -std=c++11 %s -triple x86_64-linux-gnu -emit-llvm -disable-llvm-passes -o - -fexceptions -fcxx-exceptions -pedantic-errors | llvm-cxxfilt -n | FileCheck %s --check-prefixes CHECK
-// RUN: %clang_cc1 -std=c++14 %s -triple x86_64-linux-gnu -emit-llvm -disable-llvm-passes -o - -fexceptions -fcxx-exceptions -pedantic-errors | llvm-cxxfilt -n | FileCheck %s --check-prefixes CHECK
-// RUN: %clang_cc1 -std=c++17 %s -triple x86_64-linux-gnu -emit-llvm -disable-llvm-passes -o - -fexceptions -fcxx-exceptions -pedantic-errors | llvm-cxxfilt -n | FileCheck %s --check-prefixes CHECK
-// RUN: %clang_cc1 -std=c++20 %s -triple x86_64-linux-gnu -emit-llvm -disable-llvm-passes -o - -fexceptions -fcxx-exceptions -pedantic-errors | llvm-cxxfilt -n | FileCheck %s --check-prefixes CHECK
-// RUN: %clang_cc1 -std=c++23 %s -triple x86_64-linux-gnu -emit-llvm -disable-llvm-passes -o - -fexceptions -fcxx-exceptions -pedantic-errors | llvm-cxxfilt -n | FileCheck %s --check-prefixes CHECK
-// RUN: %clang_cc1 -std=c++2c %s -triple x86_64-linux-gnu -emit-llvm -disable-llvm-passes -o - -fexceptions -fcxx-exceptions -pedantic-errors | llvm-cxxfilt -n | FileCheck %s --check-prefixes CHECK
+// RUN: %clang_cc1 -std=c++98 %s -triple x86_64-linux-gnu -emit-llvm -disable-llvm-passes -o - -fexceptions -fcxx-exceptions -pedantic-errors | llvm-cxxfilt -n | FileCheck %s --check-prefixes CHECK,CXX98-11
+// RUN: %clang_cc1 -std=c++11 %s -triple x86_64-linux-gnu -emit-llvm -disable-llvm-passes -o - -fexceptions -fcxx-exceptions -pedantic-errors | llvm-cxxfilt -n | FileCheck %s --check-prefixes CHECK,CXX98-11
+// RUN: %clang_cc1 -std=c++14 %s -triple x86_64-linux-gnu -emit-llvm -disable-llvm-passes -o - -fexceptions -fcxx-exceptions -pedantic-errors | llvm-cxxfilt -n | FileCheck %s --check-prefixes CHECK,SINCE-CXX14
+// RUN: %clang_cc1 -std=c++17 %s -triple x86_64-linux-gnu -emit-llvm -disable-llvm-passes -o - -fexceptions -fcxx-exceptions -pedantic-errors | llvm-cxxfilt -n | FileCheck %s --check-prefixes CHECK,SINCE-CXX14
+// RUN: %clang_cc1 -std=c++20 %s -triple x86_64-linux-gnu -emit-llvm -disable-llvm-passes -o - -fexceptions -fcxx-exceptions -pedantic-errors | llvm-cxxfilt -n | FileCheck %s --check-prefixes CHECK,SINCE-CXX14
+// RUN: %clang_cc1 -std=c++23 %s -triple x86_64-linux-gnu -emit-llvm -disable-llvm-passes -o - -fexceptions -fcxx-exceptions -pedantic-errors | llvm-cxxfilt -n | FileCheck %s --check-prefixes CHECK,SINCE-CXX14
+// RUN: %clang_cc1 -std=c++2c %s -triple x86_64-linux-gnu -emit-llvm -disable-llvm-passes -o - -fexceptions -fcxx-exceptions -pedantic-errors | llvm-cxxfilt -n | FileCheck %s --check-prefixes CHECK,SINCE-CXX14
 
 namespace cwg292 { // cwg292: 2.9
 
@@ -23,7 +23,8 @@ void f() {
 // CHECK:         invoke {{.*}} i32 @cwg292::g()()
 // CHECK-NEXT:           to {{.*}} unwind label %lpad
 // CHECK-LABEL: lpad:
-// CHECK:         call void @operator delete(void*)(ptr {{.*}} %[[CALL]])
+// CXX98-11:      call void @operator delete(void*)(ptr {{.*}} %[[CALL]])
+// SINCE-CXX14:   call void @operator delete(void*, unsigned long)(ptr {{.*}} %[[CALL]], i64 noundef 1)
 // CHECK-LABEL: eh.resume:
 // CHECK-LABEL: }
 
diff --git a/clang/test/CXX/expr/expr.unary/expr.new/p14.cpp b/clang/test/CXX/expr/expr.unary/expr.new/p14.cpp
index 6537cdcfeafa04..d0b24c8fe47b7c 100644
--- a/clang/test/CXX/expr/expr.unary/expr.new/p14.cpp
+++ b/clang/test/CXX/expr/expr.unary/expr.new/p14.cpp
@@ -1,4 +1,4 @@
-// RUN: %clang_cc1 -std=c++1z -fsized-deallocation -fexceptions %s -verify
+// RUN: %clang_cc1 -std=c++1z -fexceptions %s -verify
 
 using size_t = decltype(sizeof(0));
 namespace std { enum class align_val_t : size_t {}; }
diff --git a/clang/test/CodeGenCXX/cxx1y-sized-deallocation.cpp b/clang/test/CodeGenCXX/cxx1y-sized-deallocation.cpp
index 4e15657251525e..55913aff9c19b9 100644
--- a/clang/test/CodeGenCXX/cxx1y-sized-deallocation.cpp
+++ b/clang/test/CodeGenCXX/cxx1y-sized-deallocation.cpp
@@ -1,12 +1,12 @@
 // Check that delete exprs call the sized deallocation function if
-// -fsized-deallocation is passed in both C++11 and C++14.
+// -fsized-deallocation is passed in C++11 or std >= C++14.
 // RUN: %clang_cc1 -std=c++11 -fsized-deallocation %s -emit-llvm -triple x86_64-linux-gnu -o - | FileCheck %s
-// RUN: %clang_cc1 -std=c++14 -fsized-deallocation %s -emit-llvm -triple x86_64-linux-gnu -o - | FileCheck %s
+// RUN: %clang_cc1 -std=c++14 %s -emit-llvm -triple x86_64-linux-gnu -o - | FileCheck %s
 
-// Check that we don't used sized deallocation without -fsized-deallocation and
-// C++14.
+// Check that we don't used sized deallocation with -fno-sized-deallocation or without C++14.
 // RUN: %clang_cc1 -std=c++11 %s -emit-llvm -triple x86_64-linux-gnu -o - | FileCheck %s --check-prefix=CHECK-UNSIZED
-// RUN: %clang_cc1 -std=c++14 %s -emit-llvm -triple x86_64-linux-gnu -o - | FileCheck %s --check-prefix=CHECK-UNSIZED
+// RUN: %clang_cc1 -std=c++14 %s -emit-llvm -triple x86_64-linux-gnu -fno-sized-deallocation -o - \
+// RUN:     | FileCheck %s --check-prefix=CHECK-UNSIZED
 
 // CHECK-UNSIZED-NOT: _ZdlPvm
 // CHECK-UNSIZED-NOT: _ZdaPvm
diff --git a/clang/test/CodeGenCXX/cxx1z-aligned-allocation.cpp b/clang/test/CodeGenCXX/cxx1z-aligned-allocation.cpp
index ab2e4b3cdbbf9c..8823bc64a4368b 100644
--- a/clang/test/CodeGenCXX/cxx1z-aligned-allocation.cpp
+++ b/clang/test/CodeGenCXX/cxx1z-aligned-allocation.cpp
@@ -1,10 +1,10 @@
 // Check that delete exprs call aligned (de)allocation functions if
 // -faligned-allocation is passed in both C++11 and C++14.
 // RUN: %clang_cc1 -std=c++11 -fexceptions -fsized-deallocation -faligned-allocation %s -emit-llvm -triple x86_64-linux-gnu -o - | FileCheck %s
-// RUN: %clang_cc1 -std=c++14 -fexceptions -fsized-deallocation -faligned-allocation %s -emit-llvm -triple x86_64-linux-gnu -o - | FileCheck %s
-// RUN: %clang_cc1 -std=c++1z -fexceptions -fsized-deallocation %s -emit-llvm -triple x86_64-linux-gnu -o - | FileCheck %s
+// RUN: %clang_cc1 -std=c++14 -fexceptions -faligned-allocation %s -emit-llvm -triple x86_64-linux-gnu -o - | FileCheck %s
+// RUN: %clang_cc1 -std=c++1z -fexceptions %s -emit-llvm -triple x86_64-linux-gnu -o - | FileCheck %s
 
-// RUN: %clang_cc1 -std=c++1z -fexceptions -fsized-deallocation %s -emit-llvm -triple x86_64-windows-msvc -o - | FileCheck %s --check-prefix=CHECK-MS
+// RUN: %clang_cc1 -std=c++1z -fexceptions %s -emit-llvm -triple x86_64-windows-msvc -o - | FileCheck %s --check-prefix=CHECK-MS
 
 // Check that we don't used aligned (de)allocation without -faligned-allocation or C++1z.
 // RUN: %clang_cc1 -std=c++14 -DUNALIGNED -fexceptions %s -emit-llvm -triple x86_64-linux-gnu -o - | FileCheck %s --check-prefix=CHECK-UNALIGNED
diff --git a/clang/test/CodeGenCXX/cxx2a-destroying-delete.cpp b/clang/test/CodeGenCXX/cxx2a-destroying-delete.cpp
index 20264b67353a97..f6f4a2ff735cc4 100644
--- a/clang/test/CodeGenCXX/cxx2a-destroying-delete.cpp
+++ b/clang/test/CodeGenCXX/cxx2a-destroying-delete.cpp
@@ -108,10 +108,10 @@ struct J {
 // CHECK-MSABI-LABEL: define {{.*}}@"?j@@
 J *j() {
   // CHECK-ITANIUM: invoke {{.*}}@_ZN1JC1Ev(
-  // CHECK-ITANIUM: call {{.*}}@_ZdlPv(
+  // CHECK-ITANIUM: call {{.*}}@_ZdlPvm(
   // CHECK-NOT: }
   // CHECK-MSABI: invoke {{.*}}@"??0J@@Q{{AE|EAA}}@XZ"(
-  // CHECK-MSABI: call {{.*}}@"??3@YAXP{{E?}}AX@Z"(
+  // CHECK-MSABI: call {{.*}}@"??3@YAXP{{E?}}AX{{I|_K}}@Z"(
   return new J;
   // CHECK: }
 }
diff --git a/clang/test/CodeGenCXX/delete-two-arg.cpp b/clang/test/CodeGenCXX/delete-two-arg.cpp
index 552634f430a80c..a0dcd03bc5a92d 100644
--- a/clang/test/CodeGenCXX/delete-two-arg.cpp
+++ b/clang/test/CodeGenCXX/delete-two-arg.cpp
@@ -43,7 +43,9 @@ namespace test2 {
     // CHECK-NEXT: br i1 [[T1]],
     // CHECK: [[T3:%.*]] = getelementptr inbounds i8, ptr [[T0]], i32 -4
     // CHECK-NEXT: [[T5:%.*]] = load i32, ptr [[T3]]
-    // CHECK-NEXT: call void @_ZdaPv(ptr noundef [[T3]])
+    // CHECK-NEXT: [[T6:%.*]] = mul i32 4, [[T5]]
+    // CHECK-NEXT: [[T7:%.*]] = add i32 [[T6]], 4
+    // CHECK-NEXT: call void @_ZdaPvj(ptr noundef [[T3]], i32 noundef [[T7]])
     // CHECK-NEXT: br label
     ::delete[] p;
   }
diff --git a/clang/test/CodeGenCXX/delete.cpp b/clang/test/CodeGenCXX/delete.cpp
index 1a418f48b65980..d5b0dc67129102 100644
--- a/clang/test/CodeGenCXX/delete.cpp
+++ b/clang/test/CodeGenCXX/delete.cpp
@@ -16,7 +16,7 @@ void t3(S *s) {
   // CHECK: icmp {{.*}} null
   // CHECK: br i1
 
-  // CHECK: call void @_ZdlPv
+  // CHECK: call void @_ZdlPvm
 
   // Check the delete is inside the 'if !null' check unless we're optimizing
   // for size. FIXME: We could omit the branch entirely in this case.
@@ -35,7 +35,7 @@ struct T {
 void t4(T *t) {
   // CHECK: call void @_ZN1TD1Ev
   // CHECK-SIZE-NEXT: br
-  // CHECK: call void @_ZdlPv
+  // CHECK: call void @_ZdlPvm
   delete t;
 }
 
@@ -93,14 +93,16 @@ namespace test1 {
     // CHECK-NEXT: call void @_ZN5test11AD1Ev(ptr {{[^,]*}} [[CUR]])
     // CHECK-NEXT: [[ISDONE:%.*]] = icmp eq ptr [[CUR]], [[BEGIN]]
     // CHECK-NEXT: br i1 [[ISDONE]]
-    // CHECK:      call void @_ZdaPv(ptr noundef [[ALLOC]])
+    // CHECK:      [[MUL:%.*]] = mul i64 4, [[COUNT]]
+    // CHECK-NEXT: [[SIZE:%.*]] = add i64 [[MUL]], 8
+    // CHECK-NEXT: call void @_ZdaPvm(ptr noundef [[ALLOC]], i64 noundef [[SIZE]])
   }
 }
 
 namespace test2 {
   // CHECK-LABEL: define{{.*}} void @_ZN5test21fEPb
   void f(bool *b) {
-    // CHECK: call void @_ZdlPv(ptr
+    // CHECK: call void @_ZdlPvm(ptr{{.*}}i64
     delete b;
     // CHECK: call void @_ZdaPv(ptr
     delete [] b;
@@ -137,7 +139,7 @@ namespace test4 {
     // CHECK-NEXT: [[DTOR:%.*]] = load ptr, ptr [[T0]]
     // CHECK-NEXT: call void [[DTOR]](ptr {{[^,]*}} [[OBJ:%.*]])
     //   Call the global operator delete.
-    // CHECK-NEXT: call void @_ZdlPv(ptr noundef [[ALLOCATED]]) [[NUW:#[0-9]+]]
+    // CHECK-NEXT: call void @_ZdlPvm(ptr noundef [[ALLOCATED]], i64 noundef 8) [[NUW:#[0-9]+]]
     ::delete xp;
   }
 }
diff --git a/clang/test/CodeGenCXX/dllimport.cpp b/clang/test/CodeGenCXX/dllimport.cpp
index 6fec2f2982d407..484866b45389f2 100644
--- a/clang/test/CodeGenCXX/dllimport.cpp
+++ b/clang/test/CodeGenCXX/dllimport.cpp
@@ -205,7 +205,7 @@ USEVAR(VarTmpl<ExplicitSpec_Imported>)
 // Functions
 //===----------------------------------------------------------------------===//
 
-// GNU-DAG: declare dso_local void @_ZdlPv(ptr)
+// GNU-DAG: declare dso_local void @_ZdlPv{{j|y}}(ptr, i{{32|64}})
 
 // Import function declaration.
 // MSC-DAG: declare dllimport void @"?decl@@YAXXZ"()
@@ -358,7 +358,7 @@ __declspec(dllimport) void operator delete(void*);
 __declspec(dllimport) inline int *ReferencingImportedNew() { return new int[2]; }
 // MO1-DAG: define available_externally dllimport ptr @"?ReferencingImportedNew@@YAPAHXZ"
 __declspec(dllimport) inline int *ReferencingImportedDelete() { delete (int*)nullptr; }
-// MO1-DAG: define available_externally dllimport ptr @"?ReferencingImportedDelete@@YAPAHXZ"
+// MO1-DAG: declare dllimport ptr @"?ReferencingImportedDelete@@YAPAHXZ"
 USE(ReferencingImportedNew)
 USE(ReferencingImportedDelete)
 struct ClassWithDtor { ~ClassWithDtor() {} };
diff --git a/clang/test/CodeGenCXX/new.cpp b/clang/test/CodeGenCXX/new.cpp
index e278d9acfe9ee2..af225529c494e6 100644
--- a/clang/test/CodeGenCXX/new.cpp
+++ b/clang/test/CodeGenCXX/new.cpp
@@ -15,7 +15,7 @@ void t1() {
 }
 
 // CHECK: declare noundef nonnull ptr @_Znwm(i64 noundef) [[ATTR_NOBUILTIN:#[^ ]*]]
-// CHECK: declare void @_ZdlPv(ptr noundef) [[ATTR_NOBUILTIN_NOUNWIND:#[^ ]*]]
+// CHECK: declare void @_ZdlPvm(ptr noundef, i64 noundef) [[ATTR_NOBUILTIN_NOUNWIND:#[^ ]*]]
 // CHECK: declare noundef nonnull ptr @_Znam(i64 noundef) [[ATTR_NOBUILTIN]]
 // CHECK: declare void @_ZdaPv(ptr noundef) [[ATTR_NOBUILTIN_NOUNWIND]]
 
@@ -192,7 +192,7 @@ void f() {
   // CHECK: store i64 200
   delete[] new (nothrow) Alloc[10][20];
   // CHECK: call noalias noundef nonnull ptr @_Znwm
-  // CHECK: call void @_ZdlPv(ptr
+  // CHECK: call void @_ZdlPvm(ptr noundef {{%.*}}, i64 noundef 1)
   delete new bool;
   // CHECK: ret void
 }
@@ -317,7 +317,7 @@ namespace N3664 {
   void f() {
     // CHECK: call noalias noundef nonnull ptr @_Znwm(i64 noundef 4) [[ATTR_BUILTIN_NEW:#[^ ]*]]
     int *p = new int; // expected-note {{allocated with 'new' here}}
-    // CHECK: call void @_ZdlPv({{.*}}) [[ATTR_BUILTIN_DELETE:#[^ ]*]]
+    // CHECK: call void @_ZdlPvm({{.*}}) [[ATTR_BUILTIN_DELETE:#[^ ]*]]
     delete p;
 
     // CHECK: call noalias noundef nonnull ptr @_Znam(i64 noundef 12) [[ATTR_BUILTIN_NEW]]
diff --git a/clang/test/CodeGenCoroutines/coro-aligned-alloc-2.cpp b/clang/test/CodeGenCoroutines/coro-aligned-alloc-2.cpp
index a3ee964a22a10b..ecf991a2fb4940 100644
--- a/clang/test/CodeGenCoroutines/coro-aligned-alloc-2.cpp
+++ b/clang/test/CodeGenCoroutines/coro-aligned-alloc-2.cpp
@@ -1,9 +1,7 @@
 // Tests that the combination of -fcoro-aligned-allocation and -fsized-deallocation works well.
 // Test the compiler will chose sized deallocation correctly.
-// This is only enabled with `-fsized-deallocation` which is off by default.
 // RUN: %clang_cc1 -triple x86_64-unknown-linux-gnu -std=c++20 \
 // RUN:   -fcoro-aligned-allocation -S -emit-llvm %s -o - -disable-llvm-passes \
-// RUN:   -fsized-deallocation \
 // RUN:   | FileCheck %s
 
 #include "Inputs/coroutine.h"
diff --git a/clang/test/CodeGenCoroutines/coro-aligned-alloc.cpp b/clang/test/CodeGenCoroutines/coro-aligned-alloc.cpp
index d14c3d372ddb17..b50d9f8f7674ac 100644
--- a/clang/test/CodeGenCoroutines/coro-aligned-alloc.cpp
+++ b/clang/test/CodeGenCoroutines/coro-aligned-alloc.cpp
@@ -26,8 +26,9 @@ struct task {
 // CHECK: %[[aligned_new:.+]] = call{{.*}}@_ZnwmSt11align_val_t({{.*}}%[[coro_size]],{{.*}}%[[coro_align]])
 
 // CHECK: coro.free:
+// CHECK: %[[coro_size_for_free:.+]] = call{{.*}}@llvm.coro.size
 // CHECK: %[[coro_align_for_free:.+]] = call{{.*}}@llvm.coro.align
-// CHECK: call void @_ZdlPvSt11align_val_t({{.*}}[[coro_align_for_free]]
+// CHECK: call void @_ZdlPvmSt11align_val_t({{.*}}%[[coro_size_for_free]],{{.*}}%[[coro_align_for_free]])
 
 task f() {
     co_return 43;
@@ -58,8 +59,9 @@ void *operator new(std::size_t, std::align_val_t, std::nothrow_t) noexcept;
 // CHECK: %[[aligned_new:.+]] = call{{.*}}@_ZnwmSt11align_val_tSt9nothrow_t({{.*}}%[[coro_size]],{{.*}}%[[coro_align]])
 
 // CHECK: coro.free:
+// CHECK: %[[coro_size_for_free:.+]] = call{{.*}}@llvm.coro.size
 // CHECK: %[[coro_align_for_free:.+]] = call{{.*}}@llvm.coro.align
-// CHECK: call void @_ZdlPvSt11align_val_t({{.*}}[[coro_align_for_free]]
+// CHECK: call void @_ZdlPvmSt11align_val_t({{.*}}%[[coro_size_for_free]],{{.*}}%[[coro_align_for_free]])
 
 task2 f2() {
     co_return 43;
diff --git a/clang/test/CodeGenCoroutines/coro-alloc.cpp b/clang/test/CodeGenCoroutines/coro-alloc.cpp
index d026a0d7df2275..7b3be7e0b7f98d 100644
--- a/clang/test/CodeGenCoroutines/coro-alloc.cpp
+++ b/clang/test/CodeGenCoroutines/coro-alloc.cpp
@@ -70,7 +70,8 @@ extern "C" void f0(global_new_delete_tag) {
   // CHECK: br i1 %[[NeedDealloc]], label %[[FreeBB:.+]], label %[[Afterwards:.+]]
 
   // CHECK: [[FreeBB]]:
-  // CHECK: call void @_ZdlPv(ptr noundef %[[MEM]])
+  // CHECK: %[[SIZE:.+]] = call i64 @llvm.coro.size.i64()
+  // CHECK: call void @_ZdlPvm(ptr noundef %[[MEM]], i64 noundef %[[SIZE]])
   // CHECK: br label %[[Afterwards]]
 
   // CHECK: [[Afterwards]]:
@@ -99,7 +100,8 @@ extern "C" void f1(promise_new_tag ) {
 
   // CHECK: %[[FRAME:.+]] = call ptr @llvm.coro.begin(
   // CHECK: %[[MEM:.+]] = call ptr @llvm.coro.free(token %[[ID]], ptr %[[FRAME]])
-  // CHECK: call void @_ZdlPv(ptr noundef %[[MEM]])
+  // CHECK: %[[SIZE:.+]] = call i64 @llvm.coro.size.i64()
+  // CHECK: call void @_ZdlPvm(ptr noundef %[[MEM]], i64 noundef %[[SIZE]])
   co_return;
 }
 
diff --git a/clang/test/CodeGenCoroutines/coro-cleanup.cpp b/clang/test/CodeGenCoroutines/coro-cleanup.cpp
index 98f150758e2d10..4e77ac25af1bf2 100644
--- a/clang/test/CodeGenCoroutines/coro-cleanup.cpp
+++ b/clang/test/CodeGenCoroutines/coro-cleanup.cpp
@@ -84,11 +84,13 @@ void f() {
   // CHECK: [[Cleanup]]:
   // CHECK: call void @_ZNSt16coroutine_traitsIJvEE12promise_typeD1Ev(
   // CHECK: %[[Mem0:.+]] = call ptr @llvm.coro.free(
-  // CHECK: call void @_ZdlPv(ptr noundef %[[Mem0]]
+  // CHECK: %[[SIZE:.+]] = call i64 @llvm.coro.size.i64()
+  // CHECK: call void @_ZdlPvm(ptr noundef %[[Mem0]], i64 noundef %[[SIZE]])
 
   // CHECK: [[Dealloc]]:
   // THROWEND:   %[[Mem:.+]] = call ptr @llvm.coro.free(
-  // THROWEND:   call void @_ZdlPv(ptr noundef %[[Mem]])
+  // THROWEND:   %[[SIZE:.+]] = call i64 @llvm.coro.size.i64()
+  // THROWEND:   call void @_ZdlPvm(ptr noundef %[[Mem]], i64 noundef %[[SIZE]])
 
   co_return;
 }
diff --git a/clang/test/CodeGenCoroutines/coro-dealloc.cpp b/clang/test/CodeGenCoroutines/coro-dealloc.cpp
index 1f7d04b3689eb5..656c9cbd3ef21d 100644
--- a/clang/test/CodeGenCoroutines/coro-dealloc.cpp
+++ b/clang/test/CodeGenCoroutines/coro-dealloc.cpp
@@ -1,6 +1,5 @@
 // RUN: %clang_cc1 -triple x86_64-unknown-linux-gnu -std=c++20 \
 // RUN:   -S -emit-llvm %s -o - -disable-llvm-passes \
-// RUN:   -fsized-deallocation \
 // RUN:   | FileCheck %s
 
 #include "Inputs/coroutine.h"
@@ -21,7 +20,6 @@ struct task {
 };
 
 // Test the compiler will chose sized deallocation correctly.
-// This is only enabled with `-fsized-deallocation` which is off by default.
 void operator delete(void *ptr, std::size_t size) noexcept;
 
 // CHECK: define{{.*}}@_Z1fv
diff --git a/clang/test/CodeGenCoroutines/coro-gro.cpp b/clang/test/CodeGenCoroutines/coro-gro.cpp
index d4c3ff589e340a..b62134317cef2d 100644
--- a/clang/test/CodeGenCoroutines/coro-gro.cpp
+++ b/clang/test/CodeGenCoroutines/coro-gro.cpp
@@ -51,7 +51,8 @@ int f() {
 
   // CHECK: call void @_ZNSt16coroutine_traitsIiJEE12promise_typeD1Ev(
   // CHECK: %[[Mem:.+]] = call ptr @llvm.coro.free(
-  // CHECK: call void @_ZdlPv(ptr noundef %[[Mem]])
+  // CHECK: %[[SIZE:.+]] = call i64 @llvm.coro.size.i64()
+  // CHECK: call void @_ZdlPvm(ptr noundef %[[Mem]], i64 noundef %[[SIZE]])
 
   // Initialize retval from Gro and destroy Gro
   // Note this also tests delaying initialization when Gro and function return
diff --git a/clang/test/CodeGenCoroutines/pr56919.cpp b/clang/test/CodeGenCoroutines/pr56919.cpp
index c7de08ef72d7f7..baa8c27ce6649b 100644
--- a/clang/test/CodeGenCoroutines/pr56919.cpp
+++ b/clang/test/CodeGenCoroutines/pr56919.cpp
@@ -111,12 +111,15 @@ Task<void> Bar() { co_await Baz(); }
 
 // CHECK: _Z3Quxv.destroy:{{.*}}
 // CHECK-NEXT: #
-// CHECK-NEXT: jmp	_ZdlPv
+// CHECK-NEXT: movl	$40, %esi
+// CHECK-NEXT: jmp	_ZdlPvm@PLT
 
 // CHECK: _Z3Bazv.destroy:{{.*}}
 // CHECK-NEXT: #
-// CHECK-NEXT: jmp	_ZdlPv
+// CHECK-NEXT: movl	$80, %esi
+// CHECK-NEXT: jmp	_ZdlPvm
 
 // CHECK: _Z3Barv.destroy:{{.*}}
 // CHECK-NEXT: #
-// CHECK-NEXT: jmp	_ZdlPv
+// CHECK-NEXT: movl	$120, %esi
+// CHECK-NEXT: jmp	_ZdlPvm
diff --git a/clang/test/Lexer/cxx-features.cpp b/clang/test/Lexer/cxx-features.cpp
index baaa9d4434e9b7..738c3196660647 100644
--- a/clang/test/Lexer/cxx-features.cpp
+++ b/clang/test/Lexer/cxx-features.cpp
@@ -1,17 +1,17 @@
 // RUN: %clang_cc1 -std=c++98 -fcxx-exceptions -verify %s
 // RUN: %clang_cc1 -std=c++11 -fcxx-exceptions -verify %s
-// RUN: %clang_cc1 -std=c++14 -fcxx-exceptions -fsized-deallocation -verify %s
-// RUN: %clang_cc1 -std=c++17 -fcxx-exceptions -fsized-deallocation -verify %s
-// RUN: %clang_cc1 -std=c++20 -fcxx-exceptions -fsized-deallocation -verify %s
-// RUN: %clang_cc1 -std=c++23 -fcxx-exceptions -fsized-deallocation -verify %s
-// RUN: %clang_cc1 -std=c++2c -fcxx-exceptions -fsized-deallocation -verify %s
+// RUN: %clang_cc1 -std=c++14 -fcxx-exceptions -verify %s
+// RUN: %clang_cc1 -std=c++17 -fcxx-exceptions -verify %s
+// RUN: %clang_cc1 -std=c++20 -fcxx-exceptions -verify %s
+// RUN: %clang_cc1 -std=c++23 -fcxx-exceptions -verify %s
+// RUN: %clang_cc1 -std=c++2c -fcxx-exceptions -verify %s
 
 //
-// RUN: %clang_cc1 -std=c++17 -fcxx-exceptions -fsized-deallocation -frelaxed-template-template-args -DRELAXED_TEMPLATE_TEMPLATE_ARGS=1 -verify %s
-// RUN: %clang_cc1 -std=c++17 -fcxx-exceptions -fsized-deallocation -DCONCEPTS_TS=1 -verify %s
-// RUN: %clang_cc1 -std=c++14 -fno-rtti -fno-threadsafe-statics -verify %s -DNO_EXCEPTIONS -DNO_RTTI -DNO_THREADSAFE_STATICS -fsized-deallocation
-// RUN: %clang_cc1 -std=c++14 -fchar8_t -DNO_EXCEPTIONS -DCHAR8_T -verify -fsized-deallocation %s
-// RUN: %clang_cc1 -std=c++2a -fno-char8_t -DNO_EXCEPTIONS -DNO_CHAR8_T -verify -fsized-deallocation %s
+// RUN: %clang_cc1 -std=c++17 -fcxx-exceptions -frelaxed-template-template-args -DRELAXED_TEMPLATE_TEMPLATE_ARGS=1 -verify %s
+// RUN: %clang_cc1 -std=c++17 -fcxx-exceptions -DCONCEPTS_TS=1 -verify %s
+// RUN: %clang_cc1 -std=c++14 -fno-rtti -fno-threadsafe-statics -verify %s -DNO_EXCEPTIONS -DNO_RTTI -DNO_THREADSAFE_STATICS
+// RUN: %clang_cc1 -std=c++14 -fchar8_t -DNO_EXCEPTIONS -DCHAR8_T -verify %s
+// RUN: %clang_cc1 -std=c++2a -fno-char8_t -DNO_EXCEPTIONS -DNO_CHAR8_T -verify %s
 
 // expected-no-diagnostics
 
diff --git a/clang/test/PCH/cxx1z-aligned-alloc.cpp b/clang/test/PCH/cxx1z-aligned-alloc.cpp
index c1becbde3bf2ce..cccd6285978455 100644
--- a/clang/test/PCH/cxx1z-aligned-alloc.cpp
+++ b/clang/test/PCH/cxx1z-aligned-alloc.cpp
@@ -1,12 +1,12 @@
 // No PCH:
-// RUN: %clang_cc1 -pedantic -fsized-deallocation -std=c++1z -include %s -verify %s
+// RUN: %clang_cc1 -pedantic -std=c++1z -include %s -verify %s
 //
 // With PCH:
-// RUN: %clang_cc1 -pedantic -fsized-deallocation -std=c++1z -emit-pch %s -o %t
-// RUN: %clang_cc1 -pedantic -fsized-deallocation -std=c++1z -include-pch %t -verify %s
+// RUN: %clang_cc1 -pedantic -std=c++1z -emit-pch %s -o %t
+// RUN: %clang_cc1 -pedantic -std=c++1z -include-pch %t -verify %s
 
-// RUN: %clang_cc1 -pedantic -fsized-deallocation -std=c++1z -emit-pch -fpch-instantiate-templates %s -o %t
-// RUN: %clang_cc1 -pedantic -fsized-deallocation -std=c++1z -include-pch %t -verify %s
+// RUN: %clang_cc1 -pedantic -std=c++1z -emit-pch -fpch-instantiate-templates %s -o %t
+// RUN: %clang_cc1 -pedantic -std=c++1z -include-pch %t -verify %s
 
 // expected-no-diagnostics
 
diff --git a/clang/test/SemaCXX/MicrosoftExtensions.cpp b/clang/test/SemaCXX/MicrosoftExtensions.cpp
index 7286217b1644f3..98c19975095bbe 100644
--- a/clang/test/SemaCXX/MicrosoftExtensions.cpp
+++ b/clang/test/SemaCXX/MicrosoftExtensions.cpp
@@ -571,11 +571,17 @@ class PR34109_class {
   virtual ~PR34109_class() {}
 };
 
+#if !defined(__cpp_sized_deallocation)
 void operator delete(void *) throw();
 // expected-note@-1 {{previous declaration is here}}
 __declspec(dllexport) void operator delete(void *) throw();
 // expected-error@-1  {{redeclaration of 'operator delete' cannot add 'dllexport' attribute}}
-
+#else
+void operator delete(void *, unsigned int) throw();
+// expected-note@-1 {{previous declaration is here}}
+__declspec(dllexport) void operator delete(void *, unsigned int) throw();
+// expected-error@-1  {{redeclaration of 'operator delete' cannot add 'dllexport' attribute}}
+#endif
 void PR34109(int* a) {
   delete a;
 }
diff --git a/clang/test/SemaCXX/builtin-operator-new-delete.cpp b/clang/test/SemaCXX/builtin-operator-new-delete.cpp
index 6fcff92dc0952a..db15616803e373 100644
--- a/clang/test/SemaCXX/builtin-operator-new-delete.cpp
+++ b/clang/test/SemaCXX/builtin-operator-new-delete.cpp
@@ -1,4 +1,4 @@
-// RUN: %clang_cc1 -std=c++1z -fsyntax-only -verify %s
+// RUN: %clang_cc1 -std=c++1z -fno-sized-deallocation -fsyntax-only -verify %s
 // RUN: %clang_cc1 -std=c++03 -fsyntax-only -verify %s
 // RUN: %clang_cc1 -std=c++03 -faligned-allocation -fsyntax-only -verify %s
 // RUN: %clang_cc1 -std=c++11 -fsyntax-only -verify %s
diff --git a/clang/test/SemaCXX/cxx1y-sized-deallocation.cpp b/clang/test/SemaCXX/cxx1y-sized-deallocation.cpp
index 3ec65a6a64d1cc..462f1725bb1c26 100644
--- a/clang/test/SemaCXX/cxx1y-sized-deallocation.cpp
+++ b/clang/test/SemaCXX/cxx1y-sized-deallocation.cpp
@@ -1,4 +1,4 @@
-// RUN: %clang_cc1 -std=c++1y -verify %s -fsized-deallocation -fexceptions -fcxx-exceptions
+// RUN: %clang_cc1 -std=c++1y -verify %s -fexceptions -fcxx-exceptions
 
 using size_t = decltype(sizeof(0));
 void operator delete(void *, size_t) noexcept;   // expected-note {{'operator delete' declared here}}
diff --git a/clang/test/SemaCXX/unavailable_aligned_allocation.cpp b/clang/test/SemaCXX/unavailable_aligned_allocation.cpp
index be593eafe11d6a..45fdec606ad1b3 100644
--- a/clang/test/SemaCXX/unavailable_aligned_allocation.cpp
+++ b/clang/test/SemaCXX/unavailable_aligned_allocation.cpp
@@ -75,7 +75,7 @@ void testOveraligned() {
 // expected-error-re@-22 {{aligned deallocation function of type 'void (void *, enum std::align_val_t) noexcept' is {{only|not}} available on}}
 // expected-note@-23 {{if you supply your own aligned allocation functions}}
 
-// expected-error-re@-24 {{aligned deallocation function of type 'void (void *, enum std::align_val_t) noexcept' is {{only|not}} available on}}
+// expected-error-re@-24 {{aligned deallocation function of type 'void (void *, std::size_t, std::align_val_t) noexcept' is {{only|not}} available on}}
 // expected-note@-25 {{if you supply your own aligned allocation functions}}
 
 // expected-error-re@-26 {{aligned allocation function of type 'void *(std::size_t, std::align_val_t, const std::nothrow_t &) noexcept' is {{only|not}} available on}}
@@ -143,19 +143,19 @@ OveralignedS2::~OveralignedS2() {}
 // expected-no-diagnostics
 #else
 #if defined(IOS)
-// expected-error@-6 {{aligned deallocation function of type 'void (void *, enum std::align_val_t) noexcept' is only available on iOS 11 or newer}}}
+// expected-error@-6 {{aligned deallocation function of type 'void (void *, std::size_t, std::align_val_t) noexcept' is only available on iOS 11 or newer}}}
 // expected-note@-7 {{if you supply your own aligned allocation functions}}
 #elif defined(TVOS)
-// expected-error@-9 {{aligned deallocation function of type 'void (void *, enum std::align_val_t) noexcept' is only available on tvOS 11 or newer}}}
+// expected-error@-9 {{aligned deallocation function of type 'void (void *, std::size_t, std::align_val_t) noexcept' is only available on tvOS 11 or newer}}}
 // expected-note@-10 {{if you supply your own aligned allocation functions}}
 #elif defined(WATCHOS)
-// expected-error@-12 {{aligned deallocation function of type 'void (void *, enum std::align_val_t) noexcept' is only available on watchOS 4 or newer}}}
+// expected-error@-12 {{aligned deallocation function of type 'void (void *, std::size_t, std::align_val_t) noexcept' is only available on watchOS 4 or newer}}}
 // expected-note@-13 {{if you supply your own aligned allocation functions}}
 #elif defined(MACOS)
-// expected-error@-15 {{aligned deallocation function of type 'void (void *, enum std::align_val_t) noexcept' is only available on macOS 10.13 or newer}}}
+// expected-error@-15 {{aligned deallocation function of type 'void (void *, std::size_t, std::align_val_t) noexcept' is only available on macOS 10.13 or newer}}}
 // expected-note@-16 {{if you supply your own aligned allocation functions}}
 #elif defined(ZOS)
-// expected-error@-18 {{aligned deallocation function of type 'void (void *, enum std::align_val_t) noexcept' is not available on z/OS}}}
+// expected-error@-18 {{aligned deallocation function of type 'void (void *, std::size_t, std::align_val_t) noexcept' is not available on z/OS}}}
 // expected-note@-19 {{if you supply your own aligned allocation functions}}
 #endif
 #endif
@@ -209,6 +209,9 @@ void *operator new(std::size_t __sz, std::align_val_t) {
 void operator delete(void *p, std::align_val_t) {
 }
 
+void operator delete(void *p, std::size_t __sz, std::align_val_t) {
+}
+
 void testOveraligned2() {
   auto p = new ((std::align_val_t)8) OveralignedS;
   delete p;
diff --git a/clang/tools/clang-repl/CMakeLists.txt b/clang/tools/clang-repl/CMakeLists.txt
index d3dec1984b78d2..2b7d5f01418919 100644
--- a/clang/tools/clang-repl/CMakeLists.txt
+++ b/clang/tools/clang-repl/CMakeLists.txt
@@ -11,6 +11,65 @@ add_clang_tool(clang-repl
   ClangRepl.cpp
   )
 
+if(MSVC)
+  set_target_properties(clang-repl PROPERTIES WINDOWS_EXPORT_ALL_SYMBOLS 1)
+
+  # RTTI/C++ symbols
+  set(clang_repl_exports ${clang_repl_exports} ??_7type_info@@6B@
+    ?__type_info_root_node@@3U__type_info_node@@A
+    ?nothrow@std@@3Unothrow_t@1@B
+  )
+
+  # Compiler added symbols for static variables. NOT for VStudio < 2015
+  set(clang_repl_exports ${clang_repl_exports} _Init_thread_abort _Init_thread_epoch
+    _Init_thread_footer _Init_thread_header _tls_index
+  )
+
+  if(CMAKE_SIZEOF_VOID_P EQUAL 8)
+    # new/delete variants needed when linking to static msvc runtime (esp. Debug)
+    set(clang_repl_exports ${clang_repl_exports}
+      ??2@YAPEAX_K@Z
+      ??3@YAXPEAX@Z
+      ??_U@YAPEAX_K@Z
+      ??_V@YAXPEAX@Z
+      ??3@YAXPEAX_K@Z
+      ??6?$basic_ostream@DU?$char_traits@D@std@@@std@@QEAAAEAV01@H@Z
+      ??6?$basic_ostream@DU?$char_traits@D@std@@@std@@QEAAAEAV01@M@Z
+      ??6?$basic_ostream@DU?$char_traits@D@std@@@std@@QEAAAEAV01@N@Z
+      ??6?$basic_ostream@DU?$char_traits@D@std@@@std@@QEAAAEAV01@PEBX@Z
+      ??6?$basic_ostream@DU?$char_traits@D@std@@@std@@QEAAAEAV01@P6AAEAV01@AEAV01@@Z@Z
+      ??$?6U?$char_traits@D@std@@@std@@YAAEAV?$basic_ostream@DU?$char_traits@D@std@@@0@AEAV10@D@Z
+      ??$?6U?$char_traits@D@std@@@std@@YAAEAV?$basic_ostream@DU?$char_traits@D@std@@@0@AEAV10@PEBD@Z
+      ?_Facet_Register@std@@YAXPEAV_Facet_base@1@@Z
+    )
+  else()
+    set(clang_repl_exports ${clang_repl_exports}
+      ??2@YAPAXI@Z
+      ??3@YAXPAX@Z
+      ??3@YAXPAXI@Z
+      ??_U@YAPAXI@Z
+      ??_V@YAXPAX@Z
+      ??_V@YAXPAXI@Z
+      ??6?$basic_ostream@DU?$char_traits@D@std@@@std@@QAEAAV01@H@Z
+      ??6?$basic_ostream@DU?$char_traits@D@std@@@std@@QAEAAV01@M@Z
+      ??6?$basic_ostream@DU?$char_traits@D@std@@@std@@QAEAAV01@N@Z
+      ??6?$basic_ostream@DU?$char_traits@D@std@@@std@@QAEAAV01@PBX@Z
+      ??6?$basic_ostream@DU?$char_traits@D@std@@@std@@QAEAAV01@P6AAAV01@AAV01@@Z@Z
+      ??$?6U?$char_traits@D@std@@@std@@YAAAV?$basic_ostream@DU?$char_traits@D@std@@@0@AAV10@D@Z
+      ??$?6U?$char_traits@D@std@@@std@@YAAAV?$basic_ostream@DU?$char_traits@D@std@@@0@AAV10@PBD@Z
+      ?_Facet_Register@std@@YAXPAV_Facet_base@1@@Z
+    )
+  endif()
+
+  # List to '/EXPORT:sym0 /EXPORT:sym1 /EXPORT:sym2 ...'
+  foreach(sym ${clang_repl_exports})
+    set(clang_repl_link_str "${clang_repl_link_str} /EXPORT:${sym}")
+  endforeach(sym ${clang_repl_exports})
+
+  set_property(TARGET clang-repl APPEND_STRING PROPERTY LINK_FLAGS ${clang_repl_link_str})
+
+endif(MSVC)
+
 clang_target_link_libraries(clang-repl PRIVATE
   clangAST
   clangBasic
diff --git a/clang/unittests/Interpreter/CMakeLists.txt b/clang/unittests/Interpreter/CMakeLists.txt
index e5a77e77de75cd..bc831d33bf3d54 100644
--- a/clang/unittests/Interpreter/CMakeLists.txt
+++ b/clang/unittests/Interpreter/CMakeLists.txt
@@ -29,3 +29,62 @@ if(NOT WIN32)
 endif()
 
 export_executable_symbols(ClangReplInterpreterTests)
+
+if(MSVC)
+  set_target_properties(ClangReplInterpreterTests PROPERTIES WINDOWS_EXPORT_ALL_SYMBOLS 1)
+
+  # RTTI/C++ symbols
+  set(ClangReplInterpreterTests_exports ${ClangReplInterpreterTests_exports} ??_7type_info@@6B@
+    ?__type_info_root_node@@3U__type_info_node@@A
+    ?nothrow@std@@3Unothrow_t@1@B
+  )
+
+  # Compiler added symbols for static variables. NOT for VStudio < 2015
+  set(ClangReplInterpreterTests_exports ${ClangReplInterpreterTests_exports} _Init_thread_abort _Init_thread_epoch
+    _Init_thread_footer _Init_thread_header _tls_index
+  )
+
+  if(CMAKE_SIZEOF_VOID_P EQUAL 8)
+    # new/delete variants needed when linking to static msvc runtime (esp. Debug)
+    set(ClangReplInterpreterTests_exports ${ClangReplInterpreterTests_exports}
+      ??2@YAPEAX_K@Z
+      ??3@YAXPEAX@Z
+      ??_U@YAPEAX_K@Z
+      ??_V@YAXPEAX@Z
+      ??3@YAXPEAX_K@Z
+      ??6?$basic_ostream@DU?$char_traits@D@std@@@std@@QEAAAEAV01@H@Z
+      ??6?$basic_ostream@DU?$char_traits@D@std@@@std@@QEAAAEAV01@M@Z
+      ??6?$basic_ostream@DU?$char_traits@D@std@@@std@@QEAAAEAV01@N@Z
+      ??6?$basic_ostream@DU?$char_traits@D@std@@@std@@QEAAAEAV01@PEBX@Z
+      ??6?$basic_ostream@DU?$char_traits@D@std@@@std@@QEAAAEAV01@P6AAEAV01@AEAV01@@Z@Z
+      ??$?6U?$char_traits@D@std@@@std@@YAAEAV?$basic_ostream@DU?$char_traits@D@std@@@0@AEAV10@D@Z
+      ??$?6U?$char_traits@D@std@@@std@@YAAEAV?$basic_ostream@DU?$char_traits@D@std@@@0@AEAV10@PEBD@Z
+      ?_Facet_Register@std@@YAXPEAV_Facet_base@1@@Z
+    )
+  else()
+    set(ClangReplInterpreterTests_exports ${ClangReplInterpreterTests_exports}
+      ??2@YAPAXI@Z
+      ??3@YAXPAX@Z
+      ??3@YAXPAXI@Z
+      ??_U@YAPAXI@Z
+      ??_V@YAXPAX@Z
+      ??_V@YAXPAXI@Z
+      ??6?$basic_ostream@DU?$char_traits@D@std@@@std@@QAEAAV01@H@Z
+      ??6?$basic_ostream@DU?$char_traits@D@std@@@std@@QAEAAV01@M@Z
+      ??6?$basic_ostream@DU?$char_traits@D@std@@@std@@QAEAAV01@N@Z
+      ??6?$basic_ostream@DU?$char_traits@D@std@@@std@@QAEAAV01@PBX@Z
+      ??6?$basic_ostream@DU?$char_traits@D@std@@@std@@QAEAAV01@P6AAAV01@AAV01@@Z@Z
+      ??$?6U?$char_traits@D@std@@@std@@YAAAV?$basic_ostream@DU?$char_traits@D@std@@@0@AAV10@D@Z
+      ??$?6U?$char_traits@D@std@@@std@@YAAAV?$basic_ostream@DU?$char_traits@D@std@@@0@AAV10@PBD@Z
+      ?_Facet_Register@std@@YAXPAV_Facet_base@1@@Z
+    )
+  endif()
+
+  # List to '/EXPORT:sym0 /EXPORT:sym1 /EXPORT:sym2 ...'
+  foreach(sym ${ClangReplInterpreterTests_exports})
+    set(ClangReplInterpreterTests_link_str "${ClangReplInterpreterTests_link_str} /EXPORT:${sym}")
+  endforeach(sym ${ClangReplInterpreterTests_exports})
+
+  set_property(TARGET ClangReplInterpreterTests APPEND_STRING PROPERTY LINK_FLAGS ${ClangReplInterpreterTests_link_str})
+
+endif(MSVC)
diff --git a/clang/unittests/StaticAnalyzer/CallEventTest.cpp b/clang/unittests/StaticAnalyzer/CallEventTest.cpp
index adbfe02a284dc5..7c4132788ca7e5 100644
--- a/clang/unittests/StaticAnalyzer/CallEventTest.cpp
+++ b/clang/unittests/StaticAnalyzer/CallEventTest.cpp
@@ -76,7 +76,7 @@ TEST(CXXDeallocatorCall, SimpleDestructor) {
     }
   )",
                                                          Diags));
-  EXPECT_EQ(Diags, "test.CXXDeallocator: NumArgs: 1\n");
+  EXPECT_EQ(Diags, "test.CXXDeallocator: NumArgs: 2\n");
 }
 
 } // namespace
diff --git a/clang/www/cxx_status.html b/clang/www/cxx_status.html
index c233171e63c811..96705224ee4abc 100755
--- a/clang/www/cxx_status.html
+++ b/clang/www/cxx_status.html
@@ -1258,12 +1258,11 @@ <h2 id="cxx14">C++14 implementation status</h2>
 </table>
 
 <p>
-<span id="n3778">(7): In Clang 3.7 and later, sized deallocation is only enabled
-if the user passes the <code>-fsized-deallocation</code> flag. The user must
-supply definitions of the sized deallocation functions, either by providing them
-explicitly or by using a C++ standard library that does. <code>libstdc++</code>
-added these functions in version 5.0, and <code>libc++</code> added them in
-version 3.7.
+<span id="n3778">(7): The user must supply definitions of the sized deallocation
+  functions, either by providing them explicitly or by using a C++ standard library
+  that does. <code>libstdc++</code> added these functions in version 5.0, and
+  <code>libc++</code> added them in version 3.7. The user can also use the
+  <code>-fno-sized-deallocation</code> option to disable sized deallocation.
 </span>
 </p>
 </details>
diff --git a/libcxx/test/libcxx/language.support/support.dynamic/libcpp_deallocate.sh.cpp b/libcxx/test/libcxx/language.support/support.dynamic/libcpp_deallocate.sh.cpp
index f94ceaf57dbae8..aa3ce210e3638d 100644
--- a/libcxx/test/libcxx/language.support/support.dynamic/libcpp_deallocate.sh.cpp
+++ b/libcxx/test/libcxx/language.support/support.dynamic/libcpp_deallocate.sh.cpp
@@ -21,6 +21,9 @@
 // GCC doesn't support the aligned-allocation flags.
 // XFAIL: gcc
 
+// TODO(mordante) fix this test after updating clang in Docker
+// UNSUPPORTED: clang-15, clang-16, clang-17, clang-18, clang-19
+
 // RUN: %{build} -faligned-allocation -fsized-deallocation
 // RUN: %{run}
 // RUN: %{build} -faligned-allocation -fno-sized-deallocation -DNO_SIZE
diff --git a/libcxx/test/std/language.support/support.dynamic/new.delete/new.delete.array/sized_delete_array14.pass.cpp b/libcxx/test/std/language.support/support.dynamic/new.delete/new.delete.array/sized_delete_array14.pass.cpp
index 21663cdf956d42..0241e7cefcac3d 100644
--- a/libcxx/test/std/language.support/support.dynamic/new.delete/new.delete.array/sized_delete_array14.pass.cpp
+++ b/libcxx/test/std/language.support/support.dynamic/new.delete/new.delete.array/sized_delete_array14.pass.cpp
@@ -8,11 +8,11 @@
 
 // test sized operator delete[] replacement.
 
+// TODO(mordante) fix this test after updating clang in Docker
+// UNSUPPORTED: clang-15, clang-16, clang-17, clang-18, clang-19
 // UNSUPPORTED: sanitizer-new-delete, c++03, c++11
-
-// NOTE: Clang does not enable sized-deallocation in C++14 and beyond by
-// default. It is only enabled when -fsized-deallocation is given.
-// XFAIL: clang, apple-clang
+// XFAIL: apple-clang
+// XFAIL: using-built-library-before-llvm-11
 
 #include <new>
 #include <cstddef>
diff --git a/libcxx/test/std/language.support/support.dynamic/new.delete/new.delete.single/sized_delete14.pass.cpp b/libcxx/test/std/language.support/support.dynamic/new.delete/new.delete.single/sized_delete14.pass.cpp
index a8701ce7a86cff..2ab691618ea46d 100644
--- a/libcxx/test/std/language.support/support.dynamic/new.delete/new.delete.single/sized_delete14.pass.cpp
+++ b/libcxx/test/std/language.support/support.dynamic/new.delete/new.delete.single/sized_delete14.pass.cpp
@@ -8,11 +8,11 @@
 
 // test sized operator delete replacement.
 
+// TODO(mordante) fix this test after updating clang in Docker
+// UNSUPPORTED: clang-15, clang-16, clang-17, clang-18, clang-19
 // UNSUPPORTED: sanitizer-new-delete, c++03, c++11
-
-// NOTE: Clang does not enable sized-deallocation in C++14 and beyond by
-// default. It is only enabled when -fsized-deallocation is given.
-// XFAIL: clang, apple-clang
+// XFAIL: apple-clang
+// XFAIL: using-built-library-before-llvm-11
 
 #include <new>
 #include <cstddef>