Remove LLVM 8.0.1 files.

1 files changed, 0 insertions, 7663 deletions

diff --git a/gnu/llvm/tools/clang/lib/CodeGen/CGObjCMac.cpp b/gnu/llvm/tools/clang/lib/CodeGen/CGObjCMac.cpp
deleted file mode 100644
index d91eb43ca32..00000000000
--- a/gnu/llvm/tools/clang/lib/CodeGen/CGObjCMac.cpp
+++ /dev/null
@@ -1,7663 +0,0 @@
-//===------- CGObjCMac.cpp - Interface to Apple Objective-C Runtime -------===//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-//
-// This provides Objective-C code generation targeting the Apple runtime.
-//
-//===----------------------------------------------------------------------===//
-
-#include "CGBlocks.h"
-#include "CGCleanup.h"
-#include "CGObjCRuntime.h"
-#include "CGRecordLayout.h"
-#include "CodeGenFunction.h"
-#include "CodeGenModule.h"
-#include "clang/CodeGen/ConstantInitBuilder.h"
-#include "clang/AST/ASTContext.h"
-#include "clang/AST/Decl.h"
-#include "clang/AST/DeclObjC.h"
-#include "clang/AST/RecordLayout.h"
-#include "clang/AST/StmtObjC.h"
-#include "clang/Basic/CodeGenOptions.h"
-#include "clang/Basic/LangOptions.h"
-#include "clang/CodeGen/CGFunctionInfo.h"
-#include "llvm/ADT/CachedHashString.h"
-#include "llvm/ADT/DenseSet.h"
-#include "llvm/ADT/SetVector.h"
-#include "llvm/ADT/SmallPtrSet.h"
-#include "llvm/ADT/SmallString.h"
-#include "llvm/IR/CallSite.h"
-#include "llvm/IR/DataLayout.h"
-#include "llvm/IR/InlineAsm.h"
-#include "llvm/IR/IntrinsicInst.h"
-#include "llvm/IR/LLVMContext.h"
-#include "llvm/IR/Module.h"
-#include "llvm/Support/ScopedPrinter.h"
-#include "llvm/Support/raw_ostream.h"
-#include <cstdio>
-
-using namespace clang;
-using namespace CodeGen;
-
-namespace {
-
-// FIXME: We should find a nicer way to make the labels for metadata, string
-// concatenation is lame.
-
-class ObjCCommonTypesHelper {
-protected:
-  llvm::LLVMContext &VMContext;
-
-private:
-  // The types of these functions don't really matter because we
-  // should always bitcast before calling them.
-
-  /// id objc_msgSend (id, SEL, ...)
-  ///
-  /// The default messenger, used for sends whose ABI is unchanged from
-  /// the all-integer/pointer case.
-  llvm::Constant *getMessageSendFn() const {
-    // Add the non-lazy-bind attribute, since objc_msgSend is likely to
-    // be called a lot.
-    llvm::Type *params[] = { ObjectPtrTy, SelectorPtrTy };
-    return CGM.CreateRuntimeFunction(
-        llvm::FunctionType::get(ObjectPtrTy, params, true), "objc_msgSend",
-        llvm::AttributeList::get(CGM.getLLVMContext(),
-                                 llvm::AttributeList::FunctionIndex,
-                                 llvm::Attribute::NonLazyBind));
-  }
-
-  /// void objc_msgSend_stret (id, SEL, ...)
-  ///
-  /// The messenger used when the return value is an aggregate returned
-  /// by indirect reference in the first argument, and therefore the
-  /// self and selector parameters are shifted over by one.
-  llvm::Constant *getMessageSendStretFn() const {
-    llvm::Type *params[] = { ObjectPtrTy, SelectorPtrTy };
-    return CGM.CreateRuntimeFunction(llvm::FunctionType::get(CGM.VoidTy,
-                                                             params, true),
-                                     "objc_msgSend_stret");
-
-  }
-
-  /// [double | long double] objc_msgSend_fpret(id self, SEL op, ...)
-  ///
-  /// The messenger used when the return value is returned on the x87
-  /// floating-point stack; without a special entrypoint, the nil case
-  /// would be unbalanced.
-  llvm::Constant *getMessageSendFpretFn() const {
-    llvm::Type *params[] = { ObjectPtrTy, SelectorPtrTy };
-    return CGM.CreateRuntimeFunction(llvm::FunctionType::get(CGM.DoubleTy,
-                                                             params, true),
-                                     "objc_msgSend_fpret");
-
-  }
-
-  /// _Complex long double objc_msgSend_fp2ret(id self, SEL op, ...)
-  ///
-  /// The messenger used when the return value is returned in two values on the
-  /// x87 floating point stack; without a special entrypoint, the nil case
-  /// would be unbalanced. Only used on 64-bit X86.
-  llvm::Constant *getMessageSendFp2retFn() const {
-    llvm::Type *params[] = { ObjectPtrTy, SelectorPtrTy };
-    llvm::Type *longDoubleType = llvm::Type::getX86_FP80Ty(VMContext);
-    llvm::Type *resultType =
-        llvm::StructType::get(longDoubleType, longDoubleType);
-
-    return CGM.CreateRuntimeFunction(llvm::FunctionType::get(resultType,
-                                                             params, true),
-                                     "objc_msgSend_fp2ret");
-  }
-
-  /// id objc_msgSendSuper(struct objc_super *super, SEL op, ...)
-  ///
-  /// The messenger used for super calls, which have different dispatch
-  /// semantics.  The class passed is the superclass of the current
-  /// class.
-  llvm::Constant *getMessageSendSuperFn() const {
-    llvm::Type *params[] = { SuperPtrTy, SelectorPtrTy };
-    return CGM.CreateRuntimeFunction(llvm::FunctionType::get(ObjectPtrTy,
-                                                             params, true),
-                                     "objc_msgSendSuper");
-  }
-
-  /// id objc_msgSendSuper2(struct objc_super *super, SEL op, ...)
-  ///
-  /// A slightly different messenger used for super calls.  The class
-  /// passed is the current class.
-  llvm::Constant *getMessageSendSuperFn2() const {
-    llvm::Type *params[] = { SuperPtrTy, SelectorPtrTy };
-    return CGM.CreateRuntimeFunction(llvm::FunctionType::get(ObjectPtrTy,
-                                                             params, true),
-                                     "objc_msgSendSuper2");
-  }
-
-  /// void objc_msgSendSuper_stret(void *stretAddr, struct objc_super *super,
-  ///                              SEL op, ...)
-  ///
-  /// The messenger used for super calls which return an aggregate indirectly.
-  llvm::Constant *getMessageSendSuperStretFn() const {
-    llvm::Type *params[] = { Int8PtrTy, SuperPtrTy, SelectorPtrTy };
-    return CGM.CreateRuntimeFunction(
-      llvm::FunctionType::get(CGM.VoidTy, params, true),
-      "objc_msgSendSuper_stret");
-  }
-
-  /// void objc_msgSendSuper2_stret(void * stretAddr, struct objc_super *super,
-  ///                               SEL op, ...)
-  ///
-  /// objc_msgSendSuper_stret with the super2 semantics.
-  llvm::Constant *getMessageSendSuperStretFn2() const {
-    llvm::Type *params[] = { Int8PtrTy, SuperPtrTy, SelectorPtrTy };
-    return CGM.CreateRuntimeFunction(
-      llvm::FunctionType::get(CGM.VoidTy, params, true),
-      "objc_msgSendSuper2_stret");
-  }
-
-  llvm::Constant *getMessageSendSuperFpretFn() const {
-    // There is no objc_msgSendSuper_fpret? How can that work?
-    return getMessageSendSuperFn();
-  }
-
-  llvm::Constant *getMessageSendSuperFpretFn2() const {
-    // There is no objc_msgSendSuper_fpret? How can that work?
-    return getMessageSendSuperFn2();
-  }
-
-protected:
-  CodeGen::CodeGenModule &CGM;
-
-public:
-  llvm::IntegerType *ShortTy, *IntTy, *LongTy;
-  llvm::PointerType *Int8PtrTy, *Int8PtrPtrTy;
-  llvm::Type *IvarOffsetVarTy;
-
-  /// ObjectPtrTy - LLVM type for object handles (typeof(id))
-  llvm::PointerType *ObjectPtrTy;
-
-  /// PtrObjectPtrTy - LLVM type for id *
-  llvm::PointerType *PtrObjectPtrTy;
-
-  /// SelectorPtrTy - LLVM type for selector handles (typeof(SEL))
-  llvm::PointerType *SelectorPtrTy;
-
-private:
-  /// ProtocolPtrTy - LLVM type for external protocol handles
-  /// (typeof(Protocol))
-  llvm::Type *ExternalProtocolPtrTy;
-
-public:
-  llvm::Type *getExternalProtocolPtrTy() {
-    if (!ExternalProtocolPtrTy) {
-      // FIXME: It would be nice to unify this with the opaque type, so that the
-      // IR comes out a bit cleaner.
-      CodeGen::CodeGenTypes &Types = CGM.getTypes();
-      ASTContext &Ctx = CGM.getContext();
-      llvm::Type *T = Types.ConvertType(Ctx.getObjCProtoType());
-      ExternalProtocolPtrTy = llvm::PointerType::getUnqual(T);
-    }
-
-    return ExternalProtocolPtrTy;
-  }
-
-  // SuperCTy - clang type for struct objc_super.
-  QualType SuperCTy;
-  // SuperPtrCTy - clang type for struct objc_super *.
-  QualType SuperPtrCTy;
-
-  /// SuperTy - LLVM type for struct objc_super.
-  llvm::StructType *SuperTy;
-  /// SuperPtrTy - LLVM type for struct objc_super *.
-  llvm::PointerType *SuperPtrTy;
-
-  /// PropertyTy - LLVM type for struct objc_property (struct _prop_t
-  /// in GCC parlance).
-  llvm::StructType *PropertyTy;
-
-  /// PropertyListTy - LLVM type for struct objc_property_list
-  /// (_prop_list_t in GCC parlance).
-  llvm::StructType *PropertyListTy;
-  /// PropertyListPtrTy - LLVM type for struct objc_property_list*.
-  llvm::PointerType *PropertyListPtrTy;
-
-  // MethodTy - LLVM type for struct objc_method.
-  llvm::StructType *MethodTy;
-
-  /// CacheTy - LLVM type for struct objc_cache.
-  llvm::Type *CacheTy;
-  /// CachePtrTy - LLVM type for struct objc_cache *.
-  llvm::PointerType *CachePtrTy;
-
-  llvm::Constant *getGetPropertyFn() {
-    CodeGen::CodeGenTypes &Types = CGM.getTypes();
-    ASTContext &Ctx = CGM.getContext();
-    // id objc_getProperty (id, SEL, ptrdiff_t, bool)
-    CanQualType IdType = Ctx.getCanonicalParamType(Ctx.getObjCIdType());
-    CanQualType SelType = Ctx.getCanonicalParamType(Ctx.getObjCSelType());
-    CanQualType Params[] = {
-        IdType, SelType,
-        Ctx.getPointerDiffType()->getCanonicalTypeUnqualified(), Ctx.BoolTy};
-    llvm::FunctionType *FTy =
-        Types.GetFunctionType(
-          Types.arrangeBuiltinFunctionDeclaration(IdType, Params));
-    return CGM.CreateRuntimeFunction(FTy, "objc_getProperty");
-  }
-
-  llvm::Constant *getSetPropertyFn() {
-    CodeGen::CodeGenTypes &Types = CGM.getTypes();
-    ASTContext &Ctx = CGM.getContext();
-    // void objc_setProperty (id, SEL, ptrdiff_t, id, bool, bool)
-    CanQualType IdType = Ctx.getCanonicalParamType(Ctx.getObjCIdType());
-    CanQualType SelType = Ctx.getCanonicalParamType(Ctx.getObjCSelType());
-    CanQualType Params[] = {
-        IdType,
-        SelType,
-        Ctx.getPointerDiffType()->getCanonicalTypeUnqualified(),
-        IdType,
-        Ctx.BoolTy,
-        Ctx.BoolTy};
-    llvm::FunctionType *FTy =
-        Types.GetFunctionType(
-          Types.arrangeBuiltinFunctionDeclaration(Ctx.VoidTy, Params));
-    return CGM.CreateRuntimeFunction(FTy, "objc_setProperty");
-  }
-
-  llvm::Constant *getOptimizedSetPropertyFn(bool atomic, bool copy) {
-    CodeGen::CodeGenTypes &Types = CGM.getTypes();
-    ASTContext &Ctx = CGM.getContext();
-    // void objc_setProperty_atomic(id self, SEL _cmd,
-    //                              id newValue, ptrdiff_t offset);
-    // void objc_setProperty_nonatomic(id self, SEL _cmd,
-    //                                 id newValue, ptrdiff_t offset);
-    // void objc_setProperty_atomic_copy(id self, SEL _cmd,
-    //                                   id newValue, ptrdiff_t offset);
-    // void objc_setProperty_nonatomic_copy(id self, SEL _cmd,
-    //                                      id newValue, ptrdiff_t offset);
-
-    SmallVector<CanQualType,4> Params;
-    CanQualType IdType = Ctx.getCanonicalParamType(Ctx.getObjCIdType());
-    CanQualType SelType = Ctx.getCanonicalParamType(Ctx.getObjCSelType());
-    Params.push_back(IdType);
-    Params.push_back(SelType);
-    Params.push_back(IdType);
-    Params.push_back(Ctx.getPointerDiffType()->getCanonicalTypeUnqualified());
-    llvm::FunctionType *FTy =
-        Types.GetFunctionType(
-          Types.arrangeBuiltinFunctionDeclaration(Ctx.VoidTy, Params));
-    const char *name;
-    if (atomic && copy)
-      name = "objc_setProperty_atomic_copy";
-    else if (atomic && !copy)
-      name = "objc_setProperty_atomic";
-    else if (!atomic && copy)
-      name = "objc_setProperty_nonatomic_copy";
-    else
-      name = "objc_setProperty_nonatomic";
-
-    return CGM.CreateRuntimeFunction(FTy, name);
-  }
-
-  llvm::Constant *getCopyStructFn() {
-    CodeGen::CodeGenTypes &Types = CGM.getTypes();
-    ASTContext &Ctx = CGM.getContext();
-    // void objc_copyStruct (void *, const void *, size_t, bool, bool)
-    SmallVector<CanQualType,5> Params;
-    Params.push_back(Ctx.VoidPtrTy);
-    Params.push_back(Ctx.VoidPtrTy);
-    Params.push_back(Ctx.getSizeType());
-    Params.push_back(Ctx.BoolTy);
-    Params.push_back(Ctx.BoolTy);
-    llvm::FunctionType *FTy =
-        Types.GetFunctionType(
-          Types.arrangeBuiltinFunctionDeclaration(Ctx.VoidTy, Params));
-    return CGM.CreateRuntimeFunction(FTy, "objc_copyStruct");
-  }
-
-  /// This routine declares and returns address of:
-  /// void objc_copyCppObjectAtomic(
-  ///         void *dest, const void *src,
-  ///         void (*copyHelper) (void *dest, const void *source));
-  llvm::Constant *getCppAtomicObjectFunction() {
-    CodeGen::CodeGenTypes &Types = CGM.getTypes();
-    ASTContext &Ctx = CGM.getContext();
-    /// void objc_copyCppObjectAtomic(void *dest, const void *src, void *helper);
-    SmallVector<CanQualType,3> Params;
-    Params.push_back(Ctx.VoidPtrTy);
-    Params.push_back(Ctx.VoidPtrTy);
-    Params.push_back(Ctx.VoidPtrTy);
-    llvm::FunctionType *FTy =
-        Types.GetFunctionType(
-          Types.arrangeBuiltinFunctionDeclaration(Ctx.VoidTy, Params));
-    return CGM.CreateRuntimeFunction(FTy, "objc_copyCppObjectAtomic");
-  }
-
-  llvm::Constant *getEnumerationMutationFn() {
-    CodeGen::CodeGenTypes &Types = CGM.getTypes();
-    ASTContext &Ctx = CGM.getContext();
-    // void objc_enumerationMutation (id)
-    SmallVector<CanQualType,1> Params;
-    Params.push_back(Ctx.getCanonicalParamType(Ctx.getObjCIdType()));
-    llvm::FunctionType *FTy =
-        Types.GetFunctionType(
-          Types.arrangeBuiltinFunctionDeclaration(Ctx.VoidTy, Params));
-    return CGM.CreateRuntimeFunction(FTy, "objc_enumerationMutation");
-  }
-
-  llvm::Constant *getLookUpClassFn() {
-    CodeGen::CodeGenTypes &Types = CGM.getTypes();
-    ASTContext &Ctx = CGM.getContext();
-    // Class objc_lookUpClass (const char *)
-    SmallVector<CanQualType,1> Params;
-    Params.push_back(
-      Ctx.getCanonicalType(Ctx.getPointerType(Ctx.CharTy.withConst())));
-    llvm::FunctionType *FTy =
-        Types.GetFunctionType(Types.arrangeBuiltinFunctionDeclaration(
-                                Ctx.getCanonicalType(Ctx.getObjCClassType()),
-                                Params));
-    return CGM.CreateRuntimeFunction(FTy, "objc_lookUpClass");
-  }
-
-  /// GcReadWeakFn -- LLVM objc_read_weak (id *src) function.
-  llvm::Constant *getGcReadWeakFn() {
-    // id objc_read_weak (id *)
-    llvm::Type *args[] = { ObjectPtrTy->getPointerTo() };
-    llvm::FunctionType *FTy =
-      llvm::FunctionType::get(ObjectPtrTy, args, false);
-    return CGM.CreateRuntimeFunction(FTy, "objc_read_weak");
-  }
-
-  /// GcAssignWeakFn -- LLVM objc_assign_weak function.
-  llvm::Constant *getGcAssignWeakFn() {
-    // id objc_assign_weak (id, id *)
-    llvm::Type *args[] = { ObjectPtrTy, ObjectPtrTy->getPointerTo() };
-    llvm::FunctionType *FTy =
-      llvm::FunctionType::get(ObjectPtrTy, args, false);
-    return CGM.CreateRuntimeFunction(FTy, "objc_assign_weak");
-  }
-
-  /// GcAssignGlobalFn -- LLVM objc_assign_global function.
-  llvm::Constant *getGcAssignGlobalFn() {
-    // id objc_assign_global(id, id *)
-    llvm::Type *args[] = { ObjectPtrTy, ObjectPtrTy->getPointerTo() };
-    llvm::FunctionType *FTy =
-      llvm::FunctionType::get(ObjectPtrTy, args, false);
-    return CGM.CreateRuntimeFunction(FTy, "objc_assign_global");
-  }
-
-  /// GcAssignThreadLocalFn -- LLVM objc_assign_threadlocal function.
-  llvm::Constant *getGcAssignThreadLocalFn() {
-    // id objc_assign_threadlocal(id src, id * dest)
-    llvm::Type *args[] = { ObjectPtrTy, ObjectPtrTy->getPointerTo() };
-    llvm::FunctionType *FTy =
-      llvm::FunctionType::get(ObjectPtrTy, args, false);
-    return CGM.CreateRuntimeFunction(FTy, "objc_assign_threadlocal");
-  }
-
-  /// GcAssignIvarFn -- LLVM objc_assign_ivar function.
-  llvm::Constant *getGcAssignIvarFn() {
-    // id objc_assign_ivar(id, id *, ptrdiff_t)
-    llvm::Type *args[] = { ObjectPtrTy, ObjectPtrTy->getPointerTo(),
-                           CGM.PtrDiffTy };
-    llvm::FunctionType *FTy =
-      llvm::FunctionType::get(ObjectPtrTy, args, false);
-    return CGM.CreateRuntimeFunction(FTy, "objc_assign_ivar");
-  }
-
-  /// GcMemmoveCollectableFn -- LLVM objc_memmove_collectable function.
-  llvm::Constant *GcMemmoveCollectableFn() {
-    // void *objc_memmove_collectable(void *dst, const void *src, size_t size)
-    llvm::Type *args[] = { Int8PtrTy, Int8PtrTy, LongTy };
-    llvm::FunctionType *FTy = llvm::FunctionType::get(Int8PtrTy, args, false);
-    return CGM.CreateRuntimeFunction(FTy, "objc_memmove_collectable");
-  }
-
-  /// GcAssignStrongCastFn -- LLVM objc_assign_strongCast function.
-  llvm::Constant *getGcAssignStrongCastFn() {
-    // id objc_assign_strongCast(id, id *)
-    llvm::Type *args[] = { ObjectPtrTy, ObjectPtrTy->getPointerTo() };
-    llvm::FunctionType *FTy =
-      llvm::FunctionType::get(ObjectPtrTy, args, false);
-    return CGM.CreateRuntimeFunction(FTy, "objc_assign_strongCast");
-  }
-
-  /// ExceptionThrowFn - LLVM objc_exception_throw function.
-  llvm::Constant *getExceptionThrowFn() {
-    // void objc_exception_throw(id)
-    llvm::Type *args[] = { ObjectPtrTy };
-    llvm::FunctionType *FTy =
-      llvm::FunctionType::get(CGM.VoidTy, args, false);
-    return CGM.CreateRuntimeFunction(FTy, "objc_exception_throw");
-  }
-
-  /// ExceptionRethrowFn - LLVM objc_exception_rethrow function.
-  llvm::Constant *getExceptionRethrowFn() {
-    // void objc_exception_rethrow(void)
-    llvm::FunctionType *FTy = llvm::FunctionType::get(CGM.VoidTy, false);
-    return CGM.CreateRuntimeFunction(FTy, "objc_exception_rethrow");
-  }
-
-  /// SyncEnterFn - LLVM object_sync_enter function.
-  llvm::Constant *getSyncEnterFn() {
-    // int objc_sync_enter (id)
-    llvm::Type *args[] = { ObjectPtrTy };
-    llvm::FunctionType *FTy =
-      llvm::FunctionType::get(CGM.IntTy, args, false);
-    return CGM.CreateRuntimeFunction(FTy, "objc_sync_enter");
-  }
-
-  /// SyncExitFn - LLVM object_sync_exit function.
-  llvm::Constant *getSyncExitFn() {
-    // int objc_sync_exit (id)
-    llvm::Type *args[] = { ObjectPtrTy };
-    llvm::FunctionType *FTy =
-      llvm::FunctionType::get(CGM.IntTy, args, false);
-    return CGM.CreateRuntimeFunction(FTy, "objc_sync_exit");
-  }
-
-  llvm::Constant *getSendFn(bool IsSuper) const {
-    return IsSuper ? getMessageSendSuperFn() : getMessageSendFn();
-  }
-
-  llvm::Constant *getSendFn2(bool IsSuper) const {
-    return IsSuper ? getMessageSendSuperFn2() : getMessageSendFn();
-  }
-
-  llvm::Constant *getSendStretFn(bool IsSuper) const {
-    return IsSuper ? getMessageSendSuperStretFn() : getMessageSendStretFn();
-  }
-
-  llvm::Constant *getSendStretFn2(bool IsSuper) const {
-    return IsSuper ? getMessageSendSuperStretFn2() : getMessageSendStretFn();
-  }
-
-  llvm::Constant *getSendFpretFn(bool IsSuper) const {
-    return IsSuper ? getMessageSendSuperFpretFn() : getMessageSendFpretFn();
-  }
-
-  llvm::Constant *getSendFpretFn2(bool IsSuper) const {
-    return IsSuper ? getMessageSendSuperFpretFn2() : getMessageSendFpretFn();
-  }
-
-  llvm::Constant *getSendFp2retFn(bool IsSuper) const {
-    return IsSuper ? getMessageSendSuperFn() : getMessageSendFp2retFn();
-  }
-
-  llvm::Constant *getSendFp2RetFn2(bool IsSuper) const {
-    return IsSuper ? getMessageSendSuperFn2() : getMessageSendFp2retFn();
-  }
-
-  ObjCCommonTypesHelper(CodeGen::CodeGenModule &cgm);
-};
-
-/// ObjCTypesHelper - Helper class that encapsulates lazy
-/// construction of varies types used during ObjC generation.
-class ObjCTypesHelper : public ObjCCommonTypesHelper {
-public:
-  /// SymtabTy - LLVM type for struct objc_symtab.
-  llvm::StructType *SymtabTy;
-  /// SymtabPtrTy - LLVM type for struct objc_symtab *.
-  llvm::PointerType *SymtabPtrTy;
-  /// ModuleTy - LLVM type for struct objc_module.
-  llvm::StructType *ModuleTy;
-
-  /// ProtocolTy - LLVM type for struct objc_protocol.
-  llvm::StructType *ProtocolTy;
-  /// ProtocolPtrTy - LLVM type for struct objc_protocol *.
-  llvm::PointerType *ProtocolPtrTy;
-  /// ProtocolExtensionTy - LLVM type for struct
-  /// objc_protocol_extension.
-  llvm::StructType *ProtocolExtensionTy;
-  /// ProtocolExtensionTy - LLVM type for struct
-  /// objc_protocol_extension *.
-  llvm::PointerType *ProtocolExtensionPtrTy;
-  /// MethodDescriptionTy - LLVM type for struct
-  /// objc_method_description.
-  llvm::StructType *MethodDescriptionTy;
-  /// MethodDescriptionListTy - LLVM type for struct
-  /// objc_method_description_list.
-  llvm::StructType *MethodDescriptionListTy;
-  /// MethodDescriptionListPtrTy - LLVM type for struct
-  /// objc_method_description_list *.
-  llvm::PointerType *MethodDescriptionListPtrTy;
-  /// ProtocolListTy - LLVM type for struct objc_property_list.
-  llvm::StructType *ProtocolListTy;
-  /// ProtocolListPtrTy - LLVM type for struct objc_property_list*.
-  llvm::PointerType *ProtocolListPtrTy;
-  /// CategoryTy - LLVM type for struct objc_category.
-  llvm::StructType *CategoryTy;
-  /// ClassTy - LLVM type for struct objc_class.
-  llvm::StructType *ClassTy;
-  /// ClassPtrTy - LLVM type for struct objc_class *.
-  llvm::PointerType *ClassPtrTy;
-  /// ClassExtensionTy - LLVM type for struct objc_class_ext.
-  llvm::StructType *ClassExtensionTy;
-  /// ClassExtensionPtrTy - LLVM type for struct objc_class_ext *.
-  llvm::PointerType *ClassExtensionPtrTy;
-  // IvarTy - LLVM type for struct objc_ivar.
-  llvm::StructType *IvarTy;
-  /// IvarListTy - LLVM type for struct objc_ivar_list.
-  llvm::StructType *IvarListTy;
-  /// IvarListPtrTy - LLVM type for struct objc_ivar_list *.
-  llvm::PointerType *IvarListPtrTy;
-  /// MethodListTy - LLVM type for struct objc_method_list.
-  llvm::StructType *MethodListTy;
-  /// MethodListPtrTy - LLVM type for struct objc_method_list *.
-  llvm::PointerType *MethodListPtrTy;
-
-  /// ExceptionDataTy - LLVM type for struct _objc_exception_data.
-  llvm::StructType *ExceptionDataTy;
-
-  /// ExceptionTryEnterFn - LLVM objc_exception_try_enter function.
-  llvm::Constant *getExceptionTryEnterFn() {
-    llvm::Type *params[] = { ExceptionDataTy->getPointerTo() };
-    return CGM.CreateRuntimeFunction(
-      llvm::FunctionType::get(CGM.VoidTy, params, false),
-      "objc_exception_try_enter");
-  }
-
-  /// ExceptionTryExitFn - LLVM objc_exception_try_exit function.
-  llvm::Constant *getExceptionTryExitFn() {
-    llvm::Type *params[] = { ExceptionDataTy->getPointerTo() };
-    return CGM.CreateRuntimeFunction(
-      llvm::FunctionType::get(CGM.VoidTy, params, false),
-      "objc_exception_try_exit");
-  }
-
-  /// ExceptionExtractFn - LLVM objc_exception_extract function.
-  llvm::Constant *getExceptionExtractFn() {
-    llvm::Type *params[] = { ExceptionDataTy->getPointerTo() };
-    return CGM.CreateRuntimeFunction(llvm::FunctionType::get(ObjectPtrTy,
-                                                             params, false),
-                                     "objc_exception_extract");
-  }
-
-  /// ExceptionMatchFn - LLVM objc_exception_match function.
-  llvm::Constant *getExceptionMatchFn() {
-    llvm::Type *params[] = { ClassPtrTy, ObjectPtrTy };
-    return CGM.CreateRuntimeFunction(
-      llvm::FunctionType::get(CGM.Int32Ty, params, false),
-      "objc_exception_match");
-  }
-
-  /// SetJmpFn - LLVM _setjmp function.
-  llvm::Constant *getSetJmpFn() {
-    // This is specifically the prototype for x86.
-    llvm::Type *params[] = { CGM.Int32Ty->getPointerTo() };
-    return CGM.CreateRuntimeFunction(
-        llvm::FunctionType::get(CGM.Int32Ty, params, false), "_setjmp",
-        llvm::AttributeList::get(CGM.getLLVMContext(),
-                                 llvm::AttributeList::FunctionIndex,
-                                 llvm::Attribute::NonLazyBind));
-  }
-
-public:
-  ObjCTypesHelper(CodeGen::CodeGenModule &cgm);
-};
-
-/// ObjCNonFragileABITypesHelper - will have all types needed by objective-c's
-/// modern abi
-class ObjCNonFragileABITypesHelper : public ObjCCommonTypesHelper {
-public:
-  // MethodListnfABITy - LLVM for struct _method_list_t
-  llvm::StructType *MethodListnfABITy;
-
-  // MethodListnfABIPtrTy - LLVM for struct _method_list_t*
-  llvm::PointerType *MethodListnfABIPtrTy;
-
-  // ProtocolnfABITy = LLVM for struct _protocol_t
-  llvm::StructType *ProtocolnfABITy;
-
-  // ProtocolnfABIPtrTy = LLVM for struct _protocol_t*
-  llvm::PointerType *ProtocolnfABIPtrTy;
-
-  // ProtocolListnfABITy - LLVM for struct _objc_protocol_list
-  llvm::StructType *ProtocolListnfABITy;
-
-  // ProtocolListnfABIPtrTy - LLVM for struct _objc_protocol_list*
-  llvm::PointerType *ProtocolListnfABIPtrTy;
-
-  // ClassnfABITy - LLVM for struct _class_t
-  llvm::StructType *ClassnfABITy;
-
-  // ClassnfABIPtrTy - LLVM for struct _class_t*
-  llvm::PointerType *ClassnfABIPtrTy;
-
-  // IvarnfABITy - LLVM for struct _ivar_t
-  llvm::StructType *IvarnfABITy;
-
-  // IvarListnfABITy - LLVM for struct _ivar_list_t
-  llvm::StructType *IvarListnfABITy;
-
-  // IvarListnfABIPtrTy = LLVM for struct _ivar_list_t*
-  llvm::PointerType *IvarListnfABIPtrTy;
-
-  // ClassRonfABITy - LLVM for struct _class_ro_t
-  llvm::StructType *ClassRonfABITy;
-
-  // ImpnfABITy - LLVM for id (*)(id, SEL, ...)
-  llvm::PointerType *ImpnfABITy;
-
-  // CategorynfABITy - LLVM for struct _category_t
-  llvm::StructType *CategorynfABITy;
-
-  // New types for nonfragile abi messaging.
-
-  // MessageRefTy - LLVM for:
-  // struct _message_ref_t {
-  //   IMP messenger;
-  //   SEL name;
-  // };
-  llvm::StructType *MessageRefTy;
-  // MessageRefCTy - clang type for struct _message_ref_t
-  QualType MessageRefCTy;
-
-  // MessageRefPtrTy - LLVM for struct _message_ref_t*
-  llvm::Type *MessageRefPtrTy;
-  // MessageRefCPtrTy - clang type for struct _message_ref_t*
-  QualType MessageRefCPtrTy;
-
-  // SuperMessageRefTy - LLVM for:
-  // struct _super_message_ref_t {
-  //   SUPER_IMP messenger;
-  //   SEL name;
-  // };
-  llvm::StructType *SuperMessageRefTy;
-
-  // SuperMessageRefPtrTy - LLVM for struct _super_message_ref_t*
-  llvm::PointerType *SuperMessageRefPtrTy;
-
-  llvm::Constant *getMessageSendFixupFn() {
-    // id objc_msgSend_fixup(id, struct message_ref_t*, ...)
-    llvm::Type *params[] = { ObjectPtrTy, MessageRefPtrTy };
-    return CGM.CreateRuntimeFunction(llvm::FunctionType::get(ObjectPtrTy,
-                                                             params, true),
-                                     "objc_msgSend_fixup");
-  }
-
-  llvm::Constant *getMessageSendFpretFixupFn() {
-    // id objc_msgSend_fpret_fixup(id, struct message_ref_t*, ...)
-    llvm::Type *params[] = { ObjectPtrTy, MessageRefPtrTy };
-    return CGM.CreateRuntimeFunction(llvm::FunctionType::get(ObjectPtrTy,
-                                                             params, true),
-                                     "objc_msgSend_fpret_fixup");
-  }
-
-  llvm::Constant *getMessageSendStretFixupFn() {
-    // id objc_msgSend_stret_fixup(id, struct message_ref_t*, ...)
-    llvm::Type *params[] = { ObjectPtrTy, MessageRefPtrTy };
-    return CGM.CreateRuntimeFunction(llvm::FunctionType::get(ObjectPtrTy,
-                                                             params, true),
-                                     "objc_msgSend_stret_fixup");
-  }
-
-  llvm::Constant *getMessageSendSuper2FixupFn() {
-    // id objc_msgSendSuper2_fixup (struct objc_super *,
-    //                              struct _super_message_ref_t*, ...)
-    llvm::Type *params[] = { SuperPtrTy, SuperMessageRefPtrTy };
-    return  CGM.CreateRuntimeFunction(llvm::FunctionType::get(ObjectPtrTy,
-                                                              params, true),
-                                      "objc_msgSendSuper2_fixup");
-  }
-
-  llvm::Constant *getMessageSendSuper2StretFixupFn() {
-    // id objc_msgSendSuper2_stret_fixup(struct objc_super *,
-    //                                   struct _super_message_ref_t*, ...)
-    llvm::Type *params[] = { SuperPtrTy, SuperMessageRefPtrTy };
-    return  CGM.CreateRuntimeFunction(llvm::FunctionType::get(ObjectPtrTy,
-                                                              params, true),
-                                      "objc_msgSendSuper2_stret_fixup");
-  }
-
-  llvm::Constant *getObjCEndCatchFn() {
-    return CGM.CreateRuntimeFunction(llvm::FunctionType::get(CGM.VoidTy, false),
-                                     "objc_end_catch");
-
-  }
-
-  llvm::Constant *getObjCBeginCatchFn() {
-    llvm::Type *params[] = { Int8PtrTy };
-    return CGM.CreateRuntimeFunction(llvm::FunctionType::get(Int8PtrTy,
-                                                             params, false),
-                                     "objc_begin_catch");
-  }
-
-  llvm::StructType *EHTypeTy;
-  llvm::Type *EHTypePtrTy;
-
-  ObjCNonFragileABITypesHelper(CodeGen::CodeGenModule &cgm);
-};
-
-enum class ObjCLabelType {
-  ClassName,
-  MethodVarName,
-  MethodVarType,
-  PropertyName,
-};
-
-class CGObjCCommonMac : public CodeGen::CGObjCRuntime {
-public:
-  class SKIP_SCAN {
-  public:
-    unsigned skip;
-    unsigned scan;
-    SKIP_SCAN(unsigned _skip = 0, unsigned _scan = 0)
-      : skip(_skip), scan(_scan) {}
-  };
-
-  /// opcode for captured block variables layout 'instructions'.
-  /// In the following descriptions, 'I' is the value of the immediate field.
-  /// (field following the opcode).
-  ///
-  enum BLOCK_LAYOUT_OPCODE {
-    /// An operator which affects how the following layout should be
-    /// interpreted.
-    ///   I == 0: Halt interpretation and treat everything else as
-    ///           a non-pointer.  Note that this instruction is equal
-    ///           to '\0'.
-    ///   I != 0: Currently unused.
-    BLOCK_LAYOUT_OPERATOR            = 0,
-
-    /// The next I+1 bytes do not contain a value of object pointer type.
-    /// Note that this can leave the stream unaligned, meaning that
-    /// subsequent word-size instructions do not begin at a multiple of
-    /// the pointer size.
-    BLOCK_LAYOUT_NON_OBJECT_BYTES    = 1,
-
-    /// The next I+1 words do not contain a value of object pointer type.
-    /// This is simply an optimized version of BLOCK_LAYOUT_BYTES for
-    /// when the required skip quantity is a multiple of the pointer size.
-    BLOCK_LAYOUT_NON_OBJECT_WORDS    = 2,
-
-    /// The next I+1 words are __strong pointers to Objective-C
-    /// objects or blocks.
-    BLOCK_LAYOUT_STRONG              = 3,
-
-    /// The next I+1 words are pointers to __block variables.
-    BLOCK_LAYOUT_BYREF               = 4,
-
-    /// The next I+1 words are __weak pointers to Objective-C
-    /// objects or blocks.
-    BLOCK_LAYOUT_WEAK                = 5,
-
-    /// The next I+1 words are __unsafe_unretained pointers to
-    /// Objective-C objects or blocks.
-    BLOCK_LAYOUT_UNRETAINED          = 6
-
-    /// The next I+1 words are block or object pointers with some
-    /// as-yet-unspecified ownership semantics.  If we add more
-    /// flavors of ownership semantics, values will be taken from
-    /// this range.
-    ///
-    /// This is included so that older tools can at least continue
-    /// processing the layout past such things.
-    //BLOCK_LAYOUT_OWNERSHIP_UNKNOWN = 7..10,
-
-    /// All other opcodes are reserved.  Halt interpretation and
-    /// treat everything else as opaque.
-  };
-
-  class RUN_SKIP {
-  public:
-    enum BLOCK_LAYOUT_OPCODE opcode;
-    CharUnits block_var_bytepos;
-    CharUnits block_var_size;
-    RUN_SKIP(enum BLOCK_LAYOUT_OPCODE Opcode = BLOCK_LAYOUT_OPERATOR,
-             CharUnits BytePos = CharUnits::Zero(),
-             CharUnits Size = CharUnits::Zero())
-    : opcode(Opcode), block_var_bytepos(BytePos),  block_var_size(Size) {}
-
-    // Allow sorting based on byte pos.
-    bool operator<(const RUN_SKIP &b) const {
-      return block_var_bytepos < b.block_var_bytepos;
-    }
-  };
-
-protected:
-  llvm::LLVMContext &VMContext;
-  // FIXME! May not be needing this after all.
-  unsigned ObjCABI;
-
-  // arc/mrr layout of captured block literal variables.
-  SmallVector<RUN_SKIP, 16> RunSkipBlockVars;
-
-  /// LazySymbols - Symbols to generate a lazy reference for. See
-  /// DefinedSymbols and FinishModule().
-  llvm::SetVector<IdentifierInfo*> LazySymbols;
-
-  /// DefinedSymbols - External symbols which are defined by this
-  /// module. The symbols in this list and LazySymbols are used to add
-  /// special linker symbols which ensure that Objective-C modules are
-  /// linked properly.
-  llvm::SetVector<IdentifierInfo*> DefinedSymbols;
-
-  /// ClassNames - uniqued class names.
-  llvm::StringMap<llvm::GlobalVariable*> ClassNames;
-
-  /// MethodVarNames - uniqued method variable names.
-  llvm::DenseMap<Selector, llvm::GlobalVariable*> MethodVarNames;
-
-  /// DefinedCategoryNames - list of category names in form Class_Category.
-  llvm::SmallSetVector<llvm::CachedHashString, 16> DefinedCategoryNames;
-
-  /// MethodVarTypes - uniqued method type signatures. We have to use
-  /// a StringMap here because have no other unique reference.
-  llvm::StringMap<llvm::GlobalVariable*> MethodVarTypes;
-
-  /// MethodDefinitions - map of methods which have been defined in
-  /// this translation unit.
-  llvm::DenseMap<const ObjCMethodDecl*, llvm::Function*> MethodDefinitions;
-
-  /// PropertyNames - uniqued method variable names.
-  llvm::DenseMap<IdentifierInfo*, llvm::GlobalVariable*> PropertyNames;
-
-  /// ClassReferences - uniqued class references.
-  llvm::DenseMap<IdentifierInfo*, llvm::GlobalVariable*> ClassReferences;
-
-  /// SelectorReferences - uniqued selector references.
-  llvm::DenseMap<Selector, llvm::GlobalVariable*> SelectorReferences;
-
-  /// Protocols - Protocols for which an objc_protocol structure has
-  /// been emitted. Forward declarations are handled by creating an
-  /// empty structure whose initializer is filled in when/if defined.
-  llvm::DenseMap<IdentifierInfo*, llvm::GlobalVariable*> Protocols;
-
-  /// DefinedProtocols - Protocols which have actually been
-  /// defined. We should not need this, see FIXME in GenerateProtocol.
-  llvm::DenseSet<IdentifierInfo*> DefinedProtocols;
-
-  /// DefinedClasses - List of defined classes.
-  SmallVector<llvm::GlobalValue*, 16> DefinedClasses;
-
-  /// ImplementedClasses - List of @implemented classes.
-  SmallVector<const ObjCInterfaceDecl*, 16> ImplementedClasses;
-
-  /// DefinedNonLazyClasses - List of defined "non-lazy" classes.
-  SmallVector<llvm::GlobalValue*, 16> DefinedNonLazyClasses;
-
-  /// DefinedCategories - List of defined categories.
-  SmallVector<llvm::GlobalValue*, 16> DefinedCategories;
-
-  /// DefinedNonLazyCategories - List of defined "non-lazy" categories.
-  SmallVector<llvm::GlobalValue*, 16> DefinedNonLazyCategories;
-
-  /// Cached reference to the class for constant strings. This value has type
-  /// int * but is actually an Obj-C class pointer.
-  llvm::WeakTrackingVH ConstantStringClassRef;
-
-  /// The LLVM type corresponding to NSConstantString.
-  llvm::StructType *NSConstantStringType = nullptr;
-
-  llvm::StringMap<llvm::GlobalVariable *> NSConstantStringMap;
-
-  /// GetNameForMethod - Return a name for the given method.
-  /// \param[out] NameOut - The return value.
-  void GetNameForMethod(const ObjCMethodDecl *OMD,
-                        const ObjCContainerDecl *CD,
-                        SmallVectorImpl<char> &NameOut);
-
-  /// GetMethodVarName - Return a unique constant for the given
-  /// selector's name. The return value has type char *.
-  llvm::Constant *GetMethodVarName(Selector Sel);
-  llvm::Constant *GetMethodVarName(IdentifierInfo *Ident);
-
-  /// GetMethodVarType - Return a unique constant for the given
-  /// method's type encoding string. The return value has type char *.
-
-  // FIXME: This is a horrible name.
-  llvm::Constant *GetMethodVarType(const ObjCMethodDecl *D,
-                                   bool Extended = false);
-  llvm::Constant *GetMethodVarType(const FieldDecl *D);
-
-  /// GetPropertyName - Return a unique constant for the given
-  /// name. The return value has type char *.
-  llvm::Constant *GetPropertyName(IdentifierInfo *Ident);
-
-  // FIXME: This can be dropped once string functions are unified.
-  llvm::Constant *GetPropertyTypeString(const ObjCPropertyDecl *PD,
-                                        const Decl *Container);
-
-  /// GetClassName - Return a unique constant for the given selector's
-  /// runtime name (which may change via use of objc_runtime_name attribute on
-  /// class or protocol definition. The return value has type char *.
-  llvm::Constant *GetClassName(StringRef RuntimeName);
-
-  llvm::Function *GetMethodDefinition(const ObjCMethodDecl *MD);
-
-  /// BuildIvarLayout - Builds ivar layout bitmap for the class
-  /// implementation for the __strong or __weak case.
-  ///
-  /// \param hasMRCWeakIvars - Whether we are compiling in MRC and there
-  ///   are any weak ivars defined directly in the class.  Meaningless unless
-  ///   building a weak layout.  Does not guarantee that the layout will
-  ///   actually have any entries, because the ivar might be under-aligned.
-  llvm::Constant *BuildIvarLayout(const ObjCImplementationDecl *OI,
-                                  CharUnits beginOffset,
-                                  CharUnits endOffset,
-                                  bool forStrongLayout,
-                                  bool hasMRCWeakIvars);
-
-  llvm::Constant *BuildStrongIvarLayout(const ObjCImplementationDecl *OI,
-                                        CharUnits beginOffset,
-                                        CharUnits endOffset) {
-    return BuildIvarLayout(OI, beginOffset, endOffset, true, false);
-  }
-
-  llvm::Constant *BuildWeakIvarLayout(const ObjCImplementationDecl *OI,
-                                      CharUnits beginOffset,
-                                      CharUnits endOffset,
-                                      bool hasMRCWeakIvars) {
-    return BuildIvarLayout(OI, beginOffset, endOffset, false, hasMRCWeakIvars);
-  }
-
-  Qualifiers::ObjCLifetime getBlockCaptureLifetime(QualType QT, bool ByrefLayout);
-
-  void UpdateRunSkipBlockVars(bool IsByref,
-                              Qualifiers::ObjCLifetime LifeTime,
-                              CharUnits FieldOffset,
-                              CharUnits FieldSize);
-
-  void BuildRCBlockVarRecordLayout(const RecordType *RT,
-                                   CharUnits BytePos, bool &HasUnion,
-                                   bool ByrefLayout=false);
-
-  void BuildRCRecordLayout(const llvm::StructLayout *RecLayout,
-                           const RecordDecl *RD,
-                           ArrayRef<const FieldDecl*> RecFields,
-                           CharUnits BytePos, bool &HasUnion,
-                           bool ByrefLayout);
-
-  uint64_t InlineLayoutInstruction(SmallVectorImpl<unsigned char> &Layout);
-
-  llvm::Constant *getBitmapBlockLayout(bool ComputeByrefLayout);
-
-  /// GetIvarLayoutName - Returns a unique constant for the given
-  /// ivar layout bitmap.
-  llvm::Constant *GetIvarLayoutName(IdentifierInfo *Ident,
-                                    const ObjCCommonTypesHelper &ObjCTypes);
-
-  /// EmitPropertyList - Emit the given property list. The return
-  /// value has type PropertyListPtrTy.
-  llvm::Constant *EmitPropertyList(Twine Name,
-                                   const Decl *Container,
-                                   const ObjCContainerDecl *OCD,
-                                   const ObjCCommonTypesHelper &ObjCTypes,
-                                   bool IsClassProperty);
-
-  /// EmitProtocolMethodTypes - Generate the array of extended method type
-  /// strings. The return value has type Int8PtrPtrTy.
-  llvm::Constant *EmitProtocolMethodTypes(Twine Name,
-                                          ArrayRef<llvm::Constant*> MethodTypes,
-                                       const ObjCCommonTypesHelper &ObjCTypes);
-
-  /// GetProtocolRef - Return a reference to the internal protocol
-  /// description, creating an empty one if it has not been
-  /// defined. The return value has type ProtocolPtrTy.
-  llvm::Constant *GetProtocolRef(const ObjCProtocolDecl *PD);
-
-  /// Return a reference to the given Class using runtime calls rather than
-  /// by a symbol reference.
-  llvm::Value *EmitClassRefViaRuntime(CodeGenFunction &CGF,
-                                      const ObjCInterfaceDecl *ID,
-                                      ObjCCommonTypesHelper &ObjCTypes);
-
-  std::string GetSectionName(StringRef Section, StringRef MachOAttributes);
-
-public:
-  /// CreateMetadataVar - Create a global variable with internal
-  /// linkage for use by the Objective-C runtime.
-  ///
-  /// This is a convenience wrapper which not only creates the
-  /// variable, but also sets the section and alignment and adds the
-  /// global to the "llvm.used" list.
-  ///
-  /// \param Name - The variable name.
-  /// \param Init - The variable initializer; this is also used to
-  ///   define the type of the variable.
-  /// \param Section - The section the variable should go into, or empty.
-  /// \param Align - The alignment for the variable, or 0.
-  /// \param AddToUsed - Whether the variable should be added to
-  ///   "llvm.used".
-  llvm::GlobalVariable *CreateMetadataVar(Twine Name,
-                                          ConstantStructBuilder &Init,
-                                          StringRef Section, CharUnits Align,
-                                          bool AddToUsed);
-  llvm::GlobalVariable *CreateMetadataVar(Twine Name,
-                                          llvm::Constant *Init,
-                                          StringRef Section, CharUnits Align,
-                                          bool AddToUsed);
-
-  llvm::GlobalVariable *CreateCStringLiteral(StringRef Name,
-                                             ObjCLabelType LabelType,
-                                             bool ForceNonFragileABI = false,
-                                             bool NullTerminate = true);
-
-protected:
-  CodeGen::RValue EmitMessageSend(CodeGen::CodeGenFunction &CGF,
-                                  ReturnValueSlot Return,
-                                  QualType ResultType,
-                                  llvm::Value *Sel,
-                                  llvm::Value *Arg0,
-                                  QualType Arg0Ty,
-                                  bool IsSuper,
-                                  const CallArgList &CallArgs,
-                                  const ObjCMethodDecl *OMD,
-                                  const ObjCInterfaceDecl *ClassReceiver,
-                                  const ObjCCommonTypesHelper &ObjCTypes);
-
-  /// EmitImageInfo - Emit the image info marker used to encode some module
-  /// level information.
-  void EmitImageInfo();
-
-public:
-  CGObjCCommonMac(CodeGen::CodeGenModule &cgm) :
-    CGObjCRuntime(cgm), VMContext(cgm.getLLVMContext()) { }
-
-  bool isNonFragileABI() const {
-    return ObjCABI == 2;
-  }
-
-  ConstantAddress GenerateConstantString(const StringLiteral *SL) override;
-  ConstantAddress GenerateConstantNSString(const StringLiteral *SL);
-
-  llvm::Function *GenerateMethod(const ObjCMethodDecl *OMD,
-                                 const ObjCContainerDecl *CD=nullptr) override;
-
-  void GenerateProtocol(const ObjCProtocolDecl *PD) override;
-
-  /// GetOrEmitProtocol - Get the protocol object for the given
-  /// declaration, emitting it if necessary. The return value has type
-  /// ProtocolPtrTy.
-  virtual llvm::Constant *GetOrEmitProtocol(const ObjCProtocolDecl *PD)=0;
-
-  /// GetOrEmitProtocolRef - Get a forward reference to the protocol
-  /// object for the given declaration, emitting it if needed. These
-  /// forward references will be filled in with empty bodies if no
-  /// definition is seen. The return value has type ProtocolPtrTy.
-  virtual llvm::Constant *GetOrEmitProtocolRef(const ObjCProtocolDecl *PD)=0;
-
-  virtual llvm::Constant *getNSConstantStringClassRef() = 0;
-
-  llvm::Constant *BuildGCBlockLayout(CodeGen::CodeGenModule &CGM,
-                                     const CGBlockInfo &blockInfo) override;
-  llvm::Constant *BuildRCBlockLayout(CodeGen::CodeGenModule &CGM,
-                                     const CGBlockInfo &blockInfo) override;
-  std::string getRCBlockLayoutStr(CodeGen::CodeGenModule &CGM,
-                                  const CGBlockInfo &blockInfo) override;
-
-  llvm::Constant *BuildByrefLayout(CodeGen::CodeGenModule &CGM,
-                                   QualType T) override;
-
-private:
-  void fillRunSkipBlockVars(CodeGenModule &CGM, const CGBlockInfo &blockInfo);
-};
-
-namespace {
-
-enum class MethodListType {
-  CategoryInstanceMethods,
-  CategoryClassMethods,
-  InstanceMethods,
-  ClassMethods,
-  ProtocolInstanceMethods,
-  ProtocolClassMethods,
-  OptionalProtocolInstanceMethods,
-  OptionalProtocolClassMethods,
-};
-
-/// A convenience class for splitting the methods of a protocol into
-/// the four interesting groups.
-class ProtocolMethodLists {
-public:
-  enum Kind {
-    RequiredInstanceMethods,
-    RequiredClassMethods,
-    OptionalInstanceMethods,
-    OptionalClassMethods
-  };
-  enum {
-    NumProtocolMethodLists = 4
-  };
-
-  static MethodListType getMethodListKind(Kind kind) {
-    switch (kind) {
-    case RequiredInstanceMethods:
-      return MethodListType::ProtocolInstanceMethods;
-    case RequiredClassMethods:
-      return MethodListType::ProtocolClassMethods;
-    case OptionalInstanceMethods:
-      return MethodListType::OptionalProtocolInstanceMethods;
-    case OptionalClassMethods:
-      return MethodListType::OptionalProtocolClassMethods;
-    }
-    llvm_unreachable("bad kind");
-  }
-
-  SmallVector<const ObjCMethodDecl *, 4> Methods[NumProtocolMethodLists];
-
-  static ProtocolMethodLists get(const ObjCProtocolDecl *PD) {
-    ProtocolMethodLists result;
-
-    for (auto MD : PD->methods()) {
-      size_t index = (2 * size_t(MD->isOptional()))
-                   + (size_t(MD->isClassMethod()));
-      result.Methods[index].push_back(MD);
-    }
-
-    return result;
-  }
-
-  template <class Self>
-  SmallVector<llvm::Constant*, 8> emitExtendedTypesArray(Self *self) const {
-    // In both ABIs, the method types list is parallel with the
-    // concatenation of the methods arrays in the following order:
-    //   instance methods
-    //   class methods
-    //   optional instance methods
-    //   optional class methods
-    SmallVector<llvm::Constant*, 8> result;
-
-    // Methods is already in the correct order for both ABIs.
-    for (auto &list : Methods) {
-      for (auto MD : list) {
-        result.push_back(self->GetMethodVarType(MD, true));
-      }
-    }
-
-    return result;
-  }
-
-  template <class Self>
-  llvm::Constant *emitMethodList(Self *self, const ObjCProtocolDecl *PD,
-                                 Kind kind) const {
-    return self->emitMethodList(PD->getObjCRuntimeNameAsString(),
-                                getMethodListKind(kind), Methods[kind]);
-  }
-};
-
-} // end anonymous namespace
-
-class CGObjCMac : public CGObjCCommonMac {
-private:
-  friend ProtocolMethodLists;
-
-  ObjCTypesHelper ObjCTypes;
-
-  /// EmitModuleInfo - Another marker encoding module level
-  /// information.
-  void EmitModuleInfo();
-
-  /// EmitModuleSymols - Emit module symbols, the list of defined
-  /// classes and categories. The result has type SymtabPtrTy.
-  llvm::Constant *EmitModuleSymbols();
-
-  /// FinishModule - Write out global data structures at the end of
-  /// processing a translation unit.
-  void FinishModule();
-
-  /// EmitClassExtension - Generate the class extension structure used
-  /// to store the weak ivar layout and properties. The return value
-  /// has type ClassExtensionPtrTy.
-  llvm::Constant *EmitClassExtension(const ObjCImplementationDecl *ID,
-                                     CharUnits instanceSize,
-                                     bool hasMRCWeakIvars,
-                                     bool isMetaclass);
-
-  /// EmitClassRef - Return a Value*, of type ObjCTypes.ClassPtrTy,
-  /// for the given class.
-  llvm::Value *EmitClassRef(CodeGenFunction &CGF,
-                            const ObjCInterfaceDecl *ID);
-
-  llvm::Value *EmitClassRefFromId(CodeGenFunction &CGF,
-                                  IdentifierInfo *II);
-
-  llvm::Value *EmitNSAutoreleasePoolClassRef(CodeGenFunction &CGF) override;
-
-  /// EmitSuperClassRef - Emits reference to class's main metadata class.
-  llvm::Value *EmitSuperClassRef(const ObjCInterfaceDecl *ID);
-
-  /// EmitIvarList - Emit the ivar list for the given
-  /// implementation. If ForClass is true the list of class ivars
-  /// (i.e. metaclass ivars) is emitted, otherwise the list of
-  /// interface ivars will be emitted. The return value has type
-  /// IvarListPtrTy.
-  llvm::Constant *EmitIvarList(const ObjCImplementationDecl *ID,
-                               bool ForClass);
-
-  /// EmitMetaClass - Emit a forward reference to the class structure
-  /// for the metaclass of the given interface. The return value has
-  /// type ClassPtrTy.
-  llvm::Constant *EmitMetaClassRef(const ObjCInterfaceDecl *ID);
-
-  /// EmitMetaClass - Emit a class structure for the metaclass of the
-  /// given implementation. The return value has type ClassPtrTy.
-  llvm::Constant *EmitMetaClass(const ObjCImplementationDecl *ID,
-                                llvm::Constant *Protocols,
-                                ArrayRef<const ObjCMethodDecl *> Methods);
-
-  void emitMethodConstant(ConstantArrayBuilder &builder,
-                          const ObjCMethodDecl *MD);
-
-  void emitMethodDescriptionConstant(ConstantArrayBuilder &builder,
-                                     const ObjCMethodDecl *MD);
-
-  /// EmitMethodList - Emit the method list for the given
-  /// implementation. The return value has type MethodListPtrTy.
-  llvm::Constant *emitMethodList(Twine Name, MethodListType MLT,
-                                 ArrayRef<const ObjCMethodDecl *> Methods);
-
-  /// GetOrEmitProtocol - Get the protocol object for the given
-  /// declaration, emitting it if necessary. The return value has type
-  /// ProtocolPtrTy.
-  llvm::Constant *GetOrEmitProtocol(const ObjCProtocolDecl *PD) override;
-
-  /// GetOrEmitProtocolRef - Get a forward reference to the protocol
-  /// object for the given declaration, emitting it if needed. These
-  /// forward references will be filled in with empty bodies if no
-  /// definition is seen. The return value has type ProtocolPtrTy.
-  llvm::Constant *GetOrEmitProtocolRef(const ObjCProtocolDecl *PD) override;
-
-  /// EmitProtocolExtension - Generate the protocol extension
-  /// structure used to store optional instance and class methods, and
-  /// protocol properties. The return value has type
-  /// ProtocolExtensionPtrTy.
-  llvm::Constant *
-  EmitProtocolExtension(const ObjCProtocolDecl *PD,
-                        const ProtocolMethodLists &methodLists);
-
-  /// EmitProtocolList - Generate the list of referenced
-  /// protocols. The return value has type ProtocolListPtrTy.
-  llvm::Constant *EmitProtocolList(Twine Name,
-                                   ObjCProtocolDecl::protocol_iterator begin,
-                                   ObjCProtocolDecl::protocol_iterator end);
-
-  /// EmitSelector - Return a Value*, of type ObjCTypes.SelectorPtrTy,
-  /// for the given selector.
-  llvm::Value *EmitSelector(CodeGenFunction &CGF, Selector Sel);
-  Address EmitSelectorAddr(CodeGenFunction &CGF, Selector Sel);
-
-public:
-  CGObjCMac(CodeGen::CodeGenModule &cgm);
-
-  llvm::Constant *getNSConstantStringClassRef() override;
-
-  llvm::Function *ModuleInitFunction() override;
-
-  CodeGen::RValue GenerateMessageSend(CodeGen::CodeGenFunction &CGF,
-                                      ReturnValueSlot Return,
-                                      QualType ResultType,
-                                      Selector Sel, llvm::Value *Receiver,
-                                      const CallArgList &CallArgs,
-                                      const ObjCInterfaceDecl *Class,
-                                      const ObjCMethodDecl *Method) override;
-
-  CodeGen::RValue
-  GenerateMessageSendSuper(CodeGen::CodeGenFunction &CGF,
-                           ReturnValueSlot Return, QualType ResultType,
-                           Selector Sel, const ObjCInterfaceDecl *Class,
-                           bool isCategoryImpl, llvm::Value *Receiver,
-                           bool IsClassMessage, const CallArgList &CallArgs,
-                           const ObjCMethodDecl *Method) override;
-
-  llvm::Value *GetClass(CodeGenFunction &CGF,
-                        const ObjCInterfaceDecl *ID) override;
-
-  llvm::Value *GetSelector(CodeGenFunction &CGF, Selector Sel) override;
-  Address GetAddrOfSelector(CodeGenFunction &CGF, Selector Sel) override;
-
-  /// The NeXT/Apple runtimes do not support typed selectors; just emit an
-  /// untyped one.
-  llvm::Value *GetSelector(CodeGenFunction &CGF,
-                           const ObjCMethodDecl *Method) override;
-
-  llvm::Constant *GetEHType(QualType T) override;
-
-  void GenerateCategory(const ObjCCategoryImplDecl *CMD) override;
-
-  void GenerateClass(const ObjCImplementationDecl *ClassDecl) override;
-
-  void RegisterAlias(const ObjCCompatibleAliasDecl *OAD) override {}
-
-  llvm::Value *GenerateProtocolRef(CodeGenFunction &CGF,
-                                   const ObjCProtocolDecl *PD) override;
-
-  llvm::Constant *GetPropertyGetFunction() override;
-  llvm::Constant *GetPropertySetFunction() override;
-  llvm::Constant *GetOptimizedPropertySetFunction(bool atomic,
-                                                  bool copy) override;
-  llvm::Constant *GetGetStructFunction() override;
-  llvm::Constant *GetSetStructFunction() override;
-  llvm::Constant *GetCppAtomicObjectGetFunction() override;
-  llvm::Constant *GetCppAtomicObjectSetFunction() override;
-  llvm::Constant *EnumerationMutationFunction() override;
-
-  void EmitTryStmt(CodeGen::CodeGenFunction &CGF,
-                   const ObjCAtTryStmt &S) override;
-  void EmitSynchronizedStmt(CodeGen::CodeGenFunction &CGF,
-                            const ObjCAtSynchronizedStmt &S) override;
-  void EmitTryOrSynchronizedStmt(CodeGen::CodeGenFunction &CGF, const Stmt &S);
-  void EmitThrowStmt(CodeGen::CodeGenFunction &CGF, const ObjCAtThrowStmt &S,
-                     bool ClearInsertionPoint=true) override;
-  llvm::Value * EmitObjCWeakRead(CodeGen::CodeGenFunction &CGF,
-                                 Address AddrWeakObj) override;
-  void EmitObjCWeakAssign(CodeGen::CodeGenFunction &CGF,
-                          llvm::Value *src, Address dst) override;
-  void EmitObjCGlobalAssign(CodeGen::CodeGenFunction &CGF,
-                            llvm::Value *src, Address dest,
-                            bool threadlocal = false) override;
-  void EmitObjCIvarAssign(CodeGen::CodeGenFunction &CGF,
-                          llvm::Value *src, Address dest,
-                          llvm::Value *ivarOffset) override;
-  void EmitObjCStrongCastAssign(CodeGen::CodeGenFunction &CGF,
-                                llvm::Value *src, Address dest) override;
-  void EmitGCMemmoveCollectable(CodeGen::CodeGenFunction &CGF,
-                                Address dest, Address src,
-                                llvm::Value *size) override;
-
-  LValue EmitObjCValueForIvar(CodeGen::CodeGenFunction &CGF, QualType ObjectTy,
-                              llvm::Value *BaseValue, const ObjCIvarDecl *Ivar,
-                              unsigned CVRQualifiers) override;
-  llvm::Value *EmitIvarOffset(CodeGen::CodeGenFunction &CGF,
-                              const ObjCInterfaceDecl *Interface,
-                              const ObjCIvarDecl *Ivar) override;
-};
-
-class CGObjCNonFragileABIMac : public CGObjCCommonMac {
-private:
-  friend ProtocolMethodLists;
-  ObjCNonFragileABITypesHelper ObjCTypes;
-  llvm::GlobalVariable* ObjCEmptyCacheVar;
-  llvm::Constant* ObjCEmptyVtableVar;
-
-  /// SuperClassReferences - uniqued super class references.
-  llvm::DenseMap<IdentifierInfo*, llvm::GlobalVariable*> SuperClassReferences;
-
-  /// MetaClassReferences - uniqued meta class references.
-  llvm::DenseMap<IdentifierInfo*, llvm::GlobalVariable*> MetaClassReferences;
-
-  /// EHTypeReferences - uniqued class ehtype references.
-  llvm::DenseMap<IdentifierInfo*, llvm::GlobalVariable*> EHTypeReferences;
-
-  /// VTableDispatchMethods - List of methods for which we generate
-  /// vtable-based message dispatch.
-  llvm::DenseSet<Selector> VTableDispatchMethods;
-
-  /// DefinedMetaClasses - List of defined meta-classes.
-  std::vector<llvm::GlobalValue*> DefinedMetaClasses;
-
-  /// isVTableDispatchedSelector - Returns true if SEL is a
-  /// vtable-based selector.
-  bool isVTableDispatchedSelector(Selector Sel);
-
-  /// FinishNonFragileABIModule - Write out global data structures at the end of
-  /// processing a translation unit.
-  void FinishNonFragileABIModule();
-
-  /// AddModuleClassList - Add the given list of class pointers to the
-  /// module with the provided symbol and section names.
-  void AddModuleClassList(ArrayRef<llvm::GlobalValue *> Container,
-                          StringRef SymbolName, StringRef SectionName);
-
-  llvm::GlobalVariable * BuildClassRoTInitializer(unsigned flags,
-                                              unsigned InstanceStart,
-                                              unsigned InstanceSize,
-                                              const ObjCImplementationDecl *ID);
-  llvm::GlobalVariable *BuildClassObject(const ObjCInterfaceDecl *CI,
-                                         bool isMetaclass,
-                                         llvm::Constant *IsAGV,
-                                         llvm::Constant *SuperClassGV,
-                                         llvm::Constant *ClassRoGV,
-                                         bool HiddenVisibility);
-
-  void emitMethodConstant(ConstantArrayBuilder &builder,
-                            const ObjCMethodDecl *MD,
-                            bool forProtocol);
-
-  /// Emit the method list for the given implementation. The return value
-  /// has type MethodListnfABITy.
-  llvm::Constant *emitMethodList(Twine Name, MethodListType MLT,
-                                 ArrayRef<const ObjCMethodDecl *> Methods);
-
-  /// EmitIvarList - Emit the ivar list for the given
-  /// implementation. If ForClass is true the list of class ivars
-  /// (i.e. metaclass ivars) is emitted, otherwise the list of
-  /// interface ivars will be emitted. The return value has type
-  /// IvarListnfABIPtrTy.
-  llvm::Constant *EmitIvarList(const ObjCImplementationDecl *ID);
-
-  llvm::Constant *EmitIvarOffsetVar(const ObjCInterfaceDecl *ID,
-                                    const ObjCIvarDecl *Ivar,
-                                    unsigned long int offset);
-
-  /// GetOrEmitProtocol - Get the protocol object for the given
-  /// declaration, emitting it if necessary. The return value has type
-  /// ProtocolPtrTy.
-  llvm::Constant *GetOrEmitProtocol(const ObjCProtocolDecl *PD) override;
-
-  /// GetOrEmitProtocolRef - Get a forward reference to the protocol
-  /// object for the given declaration, emitting it if needed. These
-  /// forward references will be filled in with empty bodies if no
-  /// definition is seen. The return value has type ProtocolPtrTy.
-  llvm::Constant *GetOrEmitProtocolRef(const ObjCProtocolDecl *PD) override;
-
-  /// EmitProtocolList - Generate the list of referenced
-  /// protocols. The return value has type ProtocolListPtrTy.
-  llvm::Constant *EmitProtocolList(Twine Name,
-                                   ObjCProtocolDecl::protocol_iterator begin,
-                                   ObjCProtocolDecl::protocol_iterator end);
-
-  CodeGen::RValue EmitVTableMessageSend(CodeGen::CodeGenFunction &CGF,
-                                        ReturnValueSlot Return,
-                                        QualType ResultType,
-                                        Selector Sel,
-                                        llvm::Value *Receiver,
-                                        QualType Arg0Ty,
-                                        bool IsSuper,
-                                        const CallArgList &CallArgs,
-                                        const ObjCMethodDecl *Method);
-
-  /// GetClassGlobal - Return the global variable for the Objective-C
-  /// class of the given name.
-  llvm::Constant *GetClassGlobal(StringRef Name,
-                                 ForDefinition_t IsForDefinition,
-                                 bool Weak = false, bool DLLImport = false);
-  llvm::Constant *GetClassGlobal(const ObjCInterfaceDecl *ID,
-                                 bool isMetaclass,
-                                 ForDefinition_t isForDefinition);
-
-  /// EmitClassRef - Return a Value*, of type ObjCTypes.ClassPtrTy,
-  /// for the given class reference.
-  llvm::Value *EmitClassRef(CodeGenFunction &CGF,
-                            const ObjCInterfaceDecl *ID);
-
-  llvm::Value *EmitClassRefFromId(CodeGenFunction &CGF,
-                                  IdentifierInfo *II,
-                                  const ObjCInterfaceDecl *ID);
-
-  llvm::Value *EmitNSAutoreleasePoolClassRef(CodeGenFunction &CGF) override;
-
-  /// EmitSuperClassRef - Return a Value*, of type ObjCTypes.ClassPtrTy,
-  /// for the given super class reference.
-  llvm::Value *EmitSuperClassRef(CodeGenFunction &CGF,
-                                 const ObjCInterfaceDecl *ID);
-
-  /// EmitMetaClassRef - Return a Value * of the address of _class_t
-  /// meta-data
-  llvm::Value *EmitMetaClassRef(CodeGenFunction &CGF,
-                                const ObjCInterfaceDecl *ID, bool Weak);
-
-  /// ObjCIvarOffsetVariable - Returns the ivar offset variable for
-  /// the given ivar.
-  ///
-  llvm::GlobalVariable * ObjCIvarOffsetVariable(
-    const ObjCInterfaceDecl *ID,
-    const ObjCIvarDecl *Ivar);
-
-  /// EmitSelector - Return a Value*, of type ObjCTypes.SelectorPtrTy,
-  /// for the given selector.
-  llvm::Value *EmitSelector(CodeGenFunction &CGF, Selector Sel);
-  Address EmitSelectorAddr(CodeGenFunction &CGF, Selector Sel);
-
-  /// GetInterfaceEHType - Get the cached ehtype for the given Objective-C
-  /// interface. The return value has type EHTypePtrTy.
-  llvm::Constant *GetInterfaceEHType(const ObjCInterfaceDecl *ID,
-                                     ForDefinition_t IsForDefinition);
-
-  StringRef getMetaclassSymbolPrefix() const { return "OBJC_METACLASS_$_"; }
-
-  StringRef getClassSymbolPrefix() const { return "OBJC_CLASS_$_"; }
-
-  void GetClassSizeInfo(const ObjCImplementationDecl *OID,
-                        uint32_t &InstanceStart,
-                        uint32_t &InstanceSize);
-
-  // Shamelessly stolen from Analysis/CFRefCount.cpp
-  Selector GetNullarySelector(const char* name) const {
-    IdentifierInfo* II = &CGM.getContext().Idents.get(name);
-    return CGM.getContext().Selectors.getSelector(0, &II);
-  }
-
-  Selector GetUnarySelector(const char* name) const {
-    IdentifierInfo* II = &CGM.getContext().Idents.get(name);
-    return CGM.getContext().Selectors.getSelector(1, &II);
-  }
-
-  /// ImplementationIsNonLazy - Check whether the given category or
-  /// class implementation is "non-lazy".
-  bool ImplementationIsNonLazy(const ObjCImplDecl *OD) const;
-
-  bool IsIvarOffsetKnownIdempotent(const CodeGen::CodeGenFunction &CGF,
-                                   const ObjCIvarDecl *IV) {
-    // Annotate the load as an invariant load iff inside an instance method
-    // and ivar belongs to instance method's class and one of its super class.
-    // This check is needed because the ivar offset is a lazily
-    // initialised value that may depend on objc_msgSend to perform a fixup on
-    // the first message dispatch.
-    //
-    // An additional opportunity to mark the load as invariant arises when the
-    // base of the ivar access is a parameter to an Objective C method.
-    // However, because the parameters are not available in the current
-    // interface, we cannot perform this check.
-    if (const ObjCMethodDecl *MD =
-          dyn_cast_or_null<ObjCMethodDecl>(CGF.CurFuncDecl))
-      if (MD->isInstanceMethod())
-        if (const ObjCInterfaceDecl *ID = MD->getClassInterface())
-          return IV->getContainingInterface()->isSuperClassOf(ID);
-    return false;
-  }
-
-public:
-  CGObjCNonFragileABIMac(CodeGen::CodeGenModule &cgm);
-
-  llvm::Constant *getNSConstantStringClassRef() override;
-
-  llvm::Function *ModuleInitFunction() override;
-
-  CodeGen::RValue GenerateMessageSend(CodeGen::CodeGenFunction &CGF,
-                                      ReturnValueSlot Return,
-                                      QualType ResultType, Selector Sel,
-                                      llvm::Value *Receiver,
-                                      const CallArgList &CallArgs,
-                                      const ObjCInterfaceDecl *Class,
-                                      const ObjCMethodDecl *Method) override;
-
-  CodeGen::RValue
-  GenerateMessageSendSuper(CodeGen::CodeGenFunction &CGF,
-                           ReturnValueSlot Return, QualType ResultType,
-                           Selector Sel, const ObjCInterfaceDecl *Class,
-                           bool isCategoryImpl, llvm::Value *Receiver,
-                           bool IsClassMessage, const CallArgList &CallArgs,
-                           const ObjCMethodDecl *Method) override;
-
-  llvm::Value *GetClass(CodeGenFunction &CGF,
-                        const ObjCInterfaceDecl *ID) override;
-
-  llvm::Value *GetSelector(CodeGenFunction &CGF, Selector Sel) override
-    { return EmitSelector(CGF, Sel); }
-  Address GetAddrOfSelector(CodeGenFunction &CGF, Selector Sel) override
-    { return EmitSelectorAddr(CGF, Sel); }
-
-  /// The NeXT/Apple runtimes do not support typed selectors; just emit an
-  /// untyped one.
-  llvm::Value *GetSelector(CodeGenFunction &CGF,
-                           const ObjCMethodDecl *Method) override
-    { return EmitSelector(CGF, Method->getSelector()); }
-
-  void GenerateCategory(const ObjCCategoryImplDecl *CMD) override;
-
-  void GenerateClass(const ObjCImplementationDecl *ClassDecl) override;
-
-  void RegisterAlias(const ObjCCompatibleAliasDecl *OAD) override {}
-
-  llvm::Value *GenerateProtocolRef(CodeGenFunction &CGF,
-                                   const ObjCProtocolDecl *PD) override;
-
-  llvm::Constant *GetEHType(QualType T) override;
-
-  llvm::Constant *GetPropertyGetFunction() override {
-    return ObjCTypes.getGetPropertyFn();
-  }
-  llvm::Constant *GetPropertySetFunction() override {
-    return ObjCTypes.getSetPropertyFn();
-  }
-
-  llvm::Constant *GetOptimizedPropertySetFunction(bool atomic,
-                                                  bool copy) override {
-    return ObjCTypes.getOptimizedSetPropertyFn(atomic, copy);
-  }
-
-  llvm::Constant *GetSetStructFunction() override {
-    return ObjCTypes.getCopyStructFn();
-  }
-
-  llvm::Constant *GetGetStructFunction() override {
-    return ObjCTypes.getCopyStructFn();
-  }
-
-  llvm::Constant *GetCppAtomicObjectSetFunction() override {
-    return ObjCTypes.getCppAtomicObjectFunction();
-  }
-
-  llvm::Constant *GetCppAtomicObjectGetFunction() override {
-    return ObjCTypes.getCppAtomicObjectFunction();
-  }
-
-  llvm::Constant *EnumerationMutationFunction() override {
-    return ObjCTypes.getEnumerationMutationFn();
-  }
-
-  void EmitTryStmt(CodeGen::CodeGenFunction &CGF,
-                   const ObjCAtTryStmt &S) override;
-  void EmitSynchronizedStmt(CodeGen::CodeGenFunction &CGF,
-                            const ObjCAtSynchronizedStmt &S) override;
-  void EmitThrowStmt(CodeGen::CodeGenFunction &CGF, const ObjCAtThrowStmt &S,
-                     bool ClearInsertionPoint=true) override;
-  llvm::Value * EmitObjCWeakRead(CodeGen::CodeGenFunction &CGF,
-                                 Address AddrWeakObj) override;
-  void EmitObjCWeakAssign(CodeGen::CodeGenFunction &CGF,
-                          llvm::Value *src, Address edst) override;
-  void EmitObjCGlobalAssign(CodeGen::CodeGenFunction &CGF,
-                            llvm::Value *src, Address dest,
-                            bool threadlocal = false) override;
-  void EmitObjCIvarAssign(CodeGen::CodeGenFunction &CGF,
-                          llvm::Value *src, Address dest,
-                          llvm::Value *ivarOffset) override;
-  void EmitObjCStrongCastAssign(CodeGen::CodeGenFunction &CGF,
-                                llvm::Value *src, Address dest) override;
-  void EmitGCMemmoveCollectable(CodeGen::CodeGenFunction &CGF,
-                                Address dest, Address src,
-                                llvm::Value *size) override;
-  LValue EmitObjCValueForIvar(CodeGen::CodeGenFunction &CGF, QualType ObjectTy,
-                              llvm::Value *BaseValue, const ObjCIvarDecl *Ivar,
-                              unsigned CVRQualifiers) override;
-  llvm::Value *EmitIvarOffset(CodeGen::CodeGenFunction &CGF,
-                              const ObjCInterfaceDecl *Interface,
-                              const ObjCIvarDecl *Ivar) override;
-};
-
-/// A helper class for performing the null-initialization of a return
-/// value.
-struct NullReturnState {
-  llvm::BasicBlock *NullBB;
-  NullReturnState() : NullBB(nullptr) {}
-
-  /// Perform a null-check of the given receiver.
-  void init(CodeGenFunction &CGF, llvm::Value *receiver) {
-    // Make blocks for the null-receiver and call edges.
-    NullBB = CGF.createBasicBlock("msgSend.null-receiver");
-    llvm::BasicBlock *callBB = CGF.createBasicBlock("msgSend.call");
-
-    // Check for a null receiver and, if there is one, jump to the
-    // null-receiver block.  There's no point in trying to avoid it:
-    // we're always going to put *something* there, because otherwise
-    // we shouldn't have done this null-check in the first place.
-    llvm::Value *isNull = CGF.Builder.CreateIsNull(receiver);
-    CGF.Builder.CreateCondBr(isNull, NullBB, callBB);
-
-    // Otherwise, start performing the call.
-    CGF.EmitBlock(callBB);
-  }
-
-  /// Complete the null-return operation.  It is valid to call this
-  /// regardless of whether 'init' has been called.
-  RValue complete(CodeGenFunction &CGF,
-                  ReturnValueSlot returnSlot,
-                  RValue result,
-                  QualType resultType,
-                  const CallArgList &CallArgs,
-                  const ObjCMethodDecl *Method) {
-    // If we never had to do a null-check, just use the raw result.
-    if (!NullBB) return result;
-
-    // The continuation block.  This will be left null if we don't have an
-    // IP, which can happen if the method we're calling is marked noreturn.
-    llvm::BasicBlock *contBB = nullptr;
-
-    // Finish the call path.
-    llvm::BasicBlock *callBB = CGF.Builder.GetInsertBlock();
-    if (callBB) {
-      contBB = CGF.createBasicBlock("msgSend.cont");
-      CGF.Builder.CreateBr(contBB);
-    }
-
-    // Okay, start emitting the null-receiver block.
-    CGF.EmitBlock(NullBB);
-
-    // Release any consumed arguments we've got.
-    if (Method) {
-      CallArgList::const_iterator I = CallArgs.begin();
-      for (ObjCMethodDecl::param_const_iterator i = Method->param_begin(),
-           e = Method->param_end(); i != e; ++i, ++I) {
-        const ParmVarDecl *ParamDecl = (*i);
-        if (ParamDecl->hasAttr<NSConsumedAttr>()) {
-          RValue RV = I->getRValue(CGF);
-          assert(RV.isScalar() &&
-                 "NullReturnState::complete - arg not on object");
-          CGF.EmitARCRelease(RV.getScalarVal(), ARCImpreciseLifetime);
-        }
-      }
-    }
-
-    // The phi code below assumes that we haven't needed any control flow yet.
-    assert(CGF.Builder.GetInsertBlock() == NullBB);
-
-    // If we've got a void return, just jump to the continuation block.
-    if (result.isScalar() && resultType->isVoidType()) {
-      // No jumps required if the message-send was noreturn.
-      if (contBB) CGF.EmitBlock(contBB);
-      return result;
-    }
-
-    // If we've got a scalar return, build a phi.
-    if (result.isScalar()) {
-      // Derive the null-initialization value.
-      llvm::Constant *null = CGF.CGM.EmitNullConstant(resultType);
-
-      // If no join is necessary, just flow out.
-      if (!contBB) return RValue::get(null);
-
-      // Otherwise, build a phi.
-      CGF.EmitBlock(contBB);
-      llvm::PHINode *phi = CGF.Builder.CreatePHI(null->getType(), 2);
-      phi->addIncoming(result.getScalarVal(), callBB);
-      phi->addIncoming(null, NullBB);
-      return RValue::get(phi);
-    }
-
-    // If we've got an aggregate return, null the buffer out.
-    // FIXME: maybe we should be doing things differently for all the
-    // cases where the ABI has us returning (1) non-agg values in
-    // memory or (2) agg values in registers.
-    if (result.isAggregate()) {
-      assert(result.isAggregate() && "null init of non-aggregate result?");
-      if (!returnSlot.isUnused())
-        CGF.EmitNullInitialization(result.getAggregateAddress(), resultType);
-      if (contBB) CGF.EmitBlock(contBB);
-      return result;
-    }
-
-    // Complex types.
-    CGF.EmitBlock(contBB);
-    CodeGenFunction::ComplexPairTy callResult = result.getComplexVal();
-
-    // Find the scalar type and its zero value.
-    llvm::Type *scalarTy = callResult.first->getType();
-    llvm::Constant *scalarZero = llvm::Constant::getNullValue(scalarTy);
-
-    // Build phis for both coordinates.
-    llvm::PHINode *real = CGF.Builder.CreatePHI(scalarTy, 2);
-    real->addIncoming(callResult.first, callBB);
-    real->addIncoming(scalarZero, NullBB);
-    llvm::PHINode *imag = CGF.Builder.CreatePHI(scalarTy, 2);
-    imag->addIncoming(callResult.second, callBB);
-    imag->addIncoming(scalarZero, NullBB);
-    return RValue::getComplex(real, imag);
-  }
-};
-
-} // end anonymous namespace
-
-/* *** Helper Functions *** */
-
-/// getConstantGEP() - Help routine to construct simple GEPs.
-static llvm::Constant *getConstantGEP(llvm::LLVMContext &VMContext,
-                                      llvm::GlobalVariable *C, unsigned idx0,
-                                      unsigned idx1) {
-  llvm::Value *Idxs[] = {
-    llvm::ConstantInt::get(llvm::Type::getInt32Ty(VMContext), idx0),
-    llvm::ConstantInt::get(llvm::Type::getInt32Ty(VMContext), idx1)
-  };
-  return llvm::ConstantExpr::getGetElementPtr(C->getValueType(), C, Idxs);
-}
-
-/// hasObjCExceptionAttribute - Return true if this class or any super
-/// class has the __objc_exception__ attribute.
-static bool hasObjCExceptionAttribute(ASTContext &Context,
-                                      const ObjCInterfaceDecl *OID) {
-  if (OID->hasAttr<ObjCExceptionAttr>())
-    return true;
-  if (const ObjCInterfaceDecl *Super = OID->getSuperClass())
-    return hasObjCExceptionAttribute(Context, Super);
-  return false;
-}
-
-/* *** CGObjCMac Public Interface *** */
-
-CGObjCMac::CGObjCMac(CodeGen::CodeGenModule &cgm) : CGObjCCommonMac(cgm),
-                                                    ObjCTypes(cgm) {
-  ObjCABI = 1;
-  EmitImageInfo();
-}
-
-/// GetClass - Return a reference to the class for the given interface
-/// decl.
-llvm::Value *CGObjCMac::GetClass(CodeGenFunction &CGF,
-                                 const ObjCInterfaceDecl *ID) {
-  return EmitClassRef(CGF, ID);
-}
-
-/// GetSelector - Return the pointer to the unique'd string for this selector.
-llvm::Value *CGObjCMac::GetSelector(CodeGenFunction &CGF, Selector Sel) {
-  return EmitSelector(CGF, Sel);
-}
-Address CGObjCMac::GetAddrOfSelector(CodeGenFunction &CGF, Selector Sel) {
-  return EmitSelectorAddr(CGF, Sel);
-}
-llvm::Value *CGObjCMac::GetSelector(CodeGenFunction &CGF, const ObjCMethodDecl
-                                    *Method) {
-  return EmitSelector(CGF, Method->getSelector());
-}
-
-llvm::Constant *CGObjCMac::GetEHType(QualType T) {
-  if (T->isObjCIdType() ||
-      T->isObjCQualifiedIdType()) {
-    return CGM.GetAddrOfRTTIDescriptor(
-              CGM.getContext().getObjCIdRedefinitionType(), /*ForEH=*/true);
-  }
-  if (T->isObjCClassType() ||
-      T->isObjCQualifiedClassType()) {
-    return CGM.GetAddrOfRTTIDescriptor(
-             CGM.getContext().getObjCClassRedefinitionType(), /*ForEH=*/true);
-  }
-  if (T->isObjCObjectPointerType())
-    return CGM.GetAddrOfRTTIDescriptor(T,  /*ForEH=*/true);
-
-  llvm_unreachable("asking for catch type for ObjC type in fragile runtime");
-}
-
-/// Generate a constant CFString object.
-/*
-  struct __builtin_CFString {
-  const int *isa; // point to __CFConstantStringClassReference
-  int flags;
-  const char *str;
-  long length;
-  };
-*/
-
-/// or Generate a constant NSString object.
-/*
-   struct __builtin_NSString {
-     const int *isa; // point to __NSConstantStringClassReference
-     const char *str;
-     unsigned int length;
-   };
-*/
-
-ConstantAddress
-CGObjCCommonMac::GenerateConstantString(const StringLiteral *SL) {
-  return (!CGM.getLangOpts().NoConstantCFStrings
-            ? CGM.GetAddrOfConstantCFString(SL)
-            : GenerateConstantNSString(SL));
-}
-
-static llvm::StringMapEntry<llvm::GlobalVariable *> &
-GetConstantStringEntry(llvm::StringMap<llvm::GlobalVariable *> &Map,
-                       const StringLiteral *Literal, unsigned &StringLength) {
-  StringRef String = Literal->getString();
-  StringLength = String.size();
-  return *Map.insert(std::make_pair(String, nullptr)).first;
-}
-
-llvm::Constant *CGObjCMac::getNSConstantStringClassRef() {
-  if (llvm::Value *V = ConstantStringClassRef)
-    return cast<llvm::Constant>(V);
-
-  auto &StringClass = CGM.getLangOpts().ObjCConstantStringClass;
-  std::string str =
-    StringClass.empty() ? "_NSConstantStringClassReference"
-                        : "_" + StringClass + "ClassReference";
-
-  llvm::Type *PTy = llvm::ArrayType::get(CGM.IntTy, 0);
-  auto GV = CGM.CreateRuntimeVariable(PTy, str);
-  auto V = llvm::ConstantExpr::getBitCast(GV, CGM.IntTy->getPointerTo());
-  ConstantStringClassRef = V;
-  return V;
-}
-
-llvm::Constant *CGObjCNonFragileABIMac::getNSConstantStringClassRef() {
-  if (llvm::Value *V = ConstantStringClassRef)
-    return cast<llvm::Constant>(V);
-
-  auto &StringClass = CGM.getLangOpts().ObjCConstantStringClass;
-  std::string str =
-    StringClass.empty() ? "OBJC_CLASS_$_NSConstantString"
-                        : "OBJC_CLASS_$_" + StringClass;
-  auto GV = GetClassGlobal(str, NotForDefinition);
-
-  // Make sure the result is of the correct type.
-  auto V = llvm::ConstantExpr::getBitCast(GV, CGM.IntTy->getPointerTo());
-
-  ConstantStringClassRef = V;
-  return V;
-}
-
-ConstantAddress
-CGObjCCommonMac::GenerateConstantNSString(const StringLiteral *Literal) {
-  unsigned StringLength = 0;
-  llvm::StringMapEntry<llvm::GlobalVariable *> &Entry =
-    GetConstantStringEntry(NSConstantStringMap, Literal, StringLength);
-
-  if (auto *C = Entry.second)
-    return ConstantAddress(C, CharUnits::fromQuantity(C->getAlignment()));
-
-  // If we don't already have it, get _NSConstantStringClassReference.
-  llvm::Constant *Class = getNSConstantStringClassRef();
-
-  // If we don't already have it, construct the type for a constant NSString.
-  if (!NSConstantStringType) {
-    NSConstantStringType =
-      llvm::StructType::create({
-        CGM.Int32Ty->getPointerTo(),
-        CGM.Int8PtrTy,
-        CGM.IntTy
-      }, "struct.__builtin_NSString");
-  }
-
-  ConstantInitBuilder Builder(CGM);
-  auto Fields = Builder.beginStruct(NSConstantStringType);
-
-  // Class pointer.
-  Fields.add(Class);
-
-  // String pointer.
-  llvm::Constant *C =
-    llvm::ConstantDataArray::getString(VMContext, Entry.first());
-
-  llvm::GlobalValue::LinkageTypes Linkage = llvm::GlobalValue::PrivateLinkage;
-  bool isConstant = !CGM.getLangOpts().WritableStrings;
-
-  auto *GV = new llvm::GlobalVariable(CGM.getModule(), C->getType(), isConstant,
-                                      Linkage, C, ".str");
-  GV->setUnnamedAddr(llvm::GlobalValue::UnnamedAddr::Global);
-  // Don't enforce the target's minimum global alignment, since the only use
-  // of the string is via this class initializer.
-  GV->setAlignment(1);
-  Fields.addBitCast(GV, CGM.Int8PtrTy);
-
-  // String length.
-  Fields.addInt(CGM.IntTy, StringLength);
-
-  // The struct.
-  CharUnits Alignment = CGM.getPointerAlign();
-  GV = Fields.finishAndCreateGlobal("_unnamed_nsstring_", Alignment,
-                                    /*constant*/ true,
-                                    llvm::GlobalVariable::PrivateLinkage);
-  const char *NSStringSection = "__OBJC,__cstring_object,regular,no_dead_strip";
-  const char *NSStringNonFragileABISection =
-      "__DATA,__objc_stringobj,regular,no_dead_strip";
-  // FIXME. Fix section.
-  GV->setSection(CGM.getLangOpts().ObjCRuntime.isNonFragile()
-                     ? NSStringNonFragileABISection
-                     : NSStringSection);
-  Entry.second = GV;
-
-  return ConstantAddress(GV, Alignment);
-}
-
-enum {
-  kCFTaggedObjectID_Integer = (1 << 1) + 1
-};
-
-/// Generates a message send where the super is the receiver.  This is
-/// a message send to self with special delivery semantics indicating
-/// which class's method should be called.
-CodeGen::RValue
-CGObjCMac::GenerateMessageSendSuper(CodeGen::CodeGenFunction &CGF,
-                                    ReturnValueSlot Return,
-                                    QualType ResultType,
-                                    Selector Sel,
-                                    const ObjCInterfaceDecl *Class,
-                                    bool isCategoryImpl,
-                                    llvm::Value *Receiver,
-                                    bool IsClassMessage,
-                                    const CodeGen::CallArgList &CallArgs,
-                                    const ObjCMethodDecl *Method) {
-  // Create and init a super structure; this is a (receiver, class)
-  // pair we will pass to objc_msgSendSuper.
-  Address ObjCSuper =
-    CGF.CreateTempAlloca(ObjCTypes.SuperTy, CGF.getPointerAlign(),
-                         "objc_super");
-  llvm::Value *ReceiverAsObject =
-    CGF.Builder.CreateBitCast(Receiver, ObjCTypes.ObjectPtrTy);
-  CGF.Builder.CreateStore(
-      ReceiverAsObject,
-      CGF.Builder.CreateStructGEP(ObjCSuper, 0, CharUnits::Zero()));
-
-  // If this is a class message the metaclass is passed as the target.
-  llvm::Value *Target;
-  if (IsClassMessage) {
-    if (isCategoryImpl) {
-      // Message sent to 'super' in a class method defined in a category
-      // implementation requires an odd treatment.
-      // If we are in a class method, we must retrieve the
-      // _metaclass_ for the current class, pointed at by
-      // the class's "isa" pointer.  The following assumes that
-      // isa" is the first ivar in a class (which it must be).
-      Target = EmitClassRef(CGF, Class->getSuperClass());
-      Target = CGF.Builder.CreateStructGEP(ObjCTypes.ClassTy, Target, 0);
-      Target = CGF.Builder.CreateAlignedLoad(Target, CGF.getPointerAlign());
-    } else {
-      llvm::Constant *MetaClassPtr = EmitMetaClassRef(Class);
-      llvm::Value *SuperPtr =
-          CGF.Builder.CreateStructGEP(ObjCTypes.ClassTy, MetaClassPtr, 1);
-      llvm::Value *Super =
-        CGF.Builder.CreateAlignedLoad(SuperPtr, CGF.getPointerAlign());
-      Target = Super;
-    }
-  } else if (isCategoryImpl)
-    Target = EmitClassRef(CGF, Class->getSuperClass());
-  else {
-    llvm::Value *ClassPtr = EmitSuperClassRef(Class);
-    ClassPtr = CGF.Builder.CreateStructGEP(ObjCTypes.ClassTy, ClassPtr, 1);
-    Target = CGF.Builder.CreateAlignedLoad(ClassPtr, CGF.getPointerAlign());
-  }
-  // FIXME: We shouldn't need to do this cast, rectify the ASTContext and
-  // ObjCTypes types.
-  llvm::Type *ClassTy =
-    CGM.getTypes().ConvertType(CGF.getContext().getObjCClassType());
-  Target = CGF.Builder.CreateBitCast(Target, ClassTy);
-  CGF.Builder.CreateStore(Target,
-          CGF.Builder.CreateStructGEP(ObjCSuper, 1, CGF.getPointerSize()));
-  return EmitMessageSend(CGF, Return, ResultType,
-                         EmitSelector(CGF, Sel),
-                         ObjCSuper.getPointer(), ObjCTypes.SuperPtrCTy,
-                         true, CallArgs, Method, Class, ObjCTypes);
-}
-
-/// Generate code for a message send expression.
-CodeGen::RValue CGObjCMac::GenerateMessageSend(CodeGen::CodeGenFunction &CGF,
-                                               ReturnValueSlot Return,
-                                               QualType ResultType,
-                                               Selector Sel,
-                                               llvm::Value *Receiver,
-                                               const CallArgList &CallArgs,
-                                               const ObjCInterfaceDecl *Class,
-                                               const ObjCMethodDecl *Method) {
-  return EmitMessageSend(CGF, Return, ResultType,
-                         EmitSelector(CGF, Sel),
-                         Receiver, CGF.getContext().getObjCIdType(),
-                         false, CallArgs, Method, Class, ObjCTypes);
-}
-
-static bool isWeakLinkedClass(const ObjCInterfaceDecl *ID) {
-  do {
-    if (ID->isWeakImported())
-      return true;
-  } while ((ID = ID->getSuperClass()));
-
-  return false;
-}
-
-CodeGen::RValue
-CGObjCCommonMac::EmitMessageSend(CodeGen::CodeGenFunction &CGF,
-                                 ReturnValueSlot Return,
-                                 QualType ResultType,
-                                 llvm::Value *Sel,
-                                 llvm::Value *Arg0,
-                                 QualType Arg0Ty,
-                                 bool IsSuper,
-                                 const CallArgList &CallArgs,
-                                 const ObjCMethodDecl *Method,
-                                 const ObjCInterfaceDecl *ClassReceiver,
-                                 const ObjCCommonTypesHelper &ObjCTypes) {
-  CallArgList ActualArgs;
-  if (!IsSuper)
-    Arg0 = CGF.Builder.CreateBitCast(Arg0, ObjCTypes.ObjectPtrTy);
-  ActualArgs.add(RValue::get(Arg0), Arg0Ty);
-  ActualArgs.add(RValue::get(Sel), CGF.getContext().getObjCSelType());
-  ActualArgs.addFrom(CallArgs);
-
-  // If we're calling a method, use the formal signature.
-  MessageSendInfo MSI = getMessageSendInfo(Method, ResultType, ActualArgs);
-
-  if (Method)
-    assert(CGM.getContext().getCanonicalType(Method->getReturnType()) ==
-               CGM.getContext().getCanonicalType(ResultType) &&
-           "Result type mismatch!");
-
-  bool ReceiverCanBeNull = true;
-
-  // Super dispatch assumes that self is non-null; even the messenger
-  // doesn't have a null check internally.
-  if (IsSuper) {
-    ReceiverCanBeNull = false;
-
-  // If this is a direct dispatch of a class method, check whether the class,
-  // or anything in its hierarchy, was weak-linked.
-  } else if (ClassReceiver && Method && Method->isClassMethod()) {
-    ReceiverCanBeNull = isWeakLinkedClass(ClassReceiver);
-
-  // If we're emitting a method, and self is const (meaning just ARC, for now),
-  // and the receiver is a load of self, then self is a valid object.
-  } else if (auto CurMethod =
-               dyn_cast_or_null<ObjCMethodDecl>(CGF.CurCodeDecl)) {
-    auto Self = CurMethod->getSelfDecl();
-    if (Self->getType().isConstQualified()) {
-      if (auto LI = dyn_cast<llvm::LoadInst>(Arg0->stripPointerCasts())) {
-        llvm::Value *SelfAddr = CGF.GetAddrOfLocalVar(Self).getPointer();
-        if (SelfAddr == LI->getPointerOperand()) {
-          ReceiverCanBeNull = false;
-        }
-      }
-    }
-  }
-
-  bool RequiresNullCheck = false;
-
-  llvm::Constant *Fn = nullptr;
-  if (CGM.ReturnSlotInterferesWithArgs(MSI.CallInfo)) {
-    if (ReceiverCanBeNull) RequiresNullCheck = true;
-    Fn = (ObjCABI == 2) ?  ObjCTypes.getSendStretFn2(IsSuper)
-      : ObjCTypes.getSendStretFn(IsSuper);
-  } else if (CGM.ReturnTypeUsesFPRet(ResultType)) {
-    Fn = (ObjCABI == 2) ? ObjCTypes.getSendFpretFn2(IsSuper)
-      : ObjCTypes.getSendFpretFn(IsSuper);
-  } else if (CGM.ReturnTypeUsesFP2Ret(ResultType)) {
-    Fn = (ObjCABI == 2) ? ObjCTypes.getSendFp2RetFn2(IsSuper)
-      : ObjCTypes.getSendFp2retFn(IsSuper);
-  } else {
-    // arm64 uses objc_msgSend for stret methods and yet null receiver check
-    // must be made for it.
-    if (ReceiverCanBeNull && CGM.ReturnTypeUsesSRet(MSI.CallInfo))
-      RequiresNullCheck = true;
-    Fn = (ObjCABI == 2) ? ObjCTypes.getSendFn2(IsSuper)
-      : ObjCTypes.getSendFn(IsSuper);
-  }
-
-  // We don't need to emit a null check to zero out an indirect result if the
-  // result is ignored.
-  if (Return.isUnused())
-    RequiresNullCheck = false;
-
-  // Emit a null-check if there's a consumed argument other than the receiver.
-  if (!RequiresNullCheck && CGM.getLangOpts().ObjCAutoRefCount && Method) {
-    for (const auto *ParamDecl : Method->parameters()) {
-      if (ParamDecl->hasAttr<NSConsumedAttr>()) {
-        RequiresNullCheck = true;
-        break;
-      }
-    }
-  }
-
-  NullReturnState nullReturn;
-  if (RequiresNullCheck) {
-    nullReturn.init(CGF, Arg0);
-  }
-
-  llvm::Instruction *CallSite;
-  Fn = llvm::ConstantExpr::getBitCast(Fn, MSI.MessengerType);
-  CGCallee Callee = CGCallee::forDirect(Fn);
-  RValue rvalue = CGF.EmitCall(MSI.CallInfo, Callee, Return, ActualArgs,
-                               &CallSite);
-
-  // Mark the call as noreturn if the method is marked noreturn and the
-  // receiver cannot be null.
-  if (Method && Method->hasAttr<NoReturnAttr>() && !ReceiverCanBeNull) {
-    llvm::CallSite(CallSite).setDoesNotReturn();
-  }
-
-  return nullReturn.complete(CGF, Return, rvalue, ResultType, CallArgs,
-                             RequiresNullCheck ? Method : nullptr);
-}
-
-static Qualifiers::GC GetGCAttrTypeForType(ASTContext &Ctx, QualType FQT,
-                                           bool pointee = false) {
-  // Note that GC qualification applies recursively to C pointer types
-  // that aren't otherwise decorated.  This is weird, but it's probably
-  // an intentional workaround to the unreliable placement of GC qualifiers.
-  if (FQT.isObjCGCStrong())
-    return Qualifiers::Strong;
-
-  if (FQT.isObjCGCWeak())
-    return Qualifiers::Weak;
-
-  if (auto ownership = FQT.getObjCLifetime()) {
-    // Ownership does not apply recursively to C pointer types.
-    if (pointee) return Qualifiers::GCNone;
-    switch (ownership) {
-    case Qualifiers::OCL_Weak: return Qualifiers::Weak;
-    case Qualifiers::OCL_Strong: return Qualifiers::Strong;
-    case Qualifiers::OCL_ExplicitNone: return Qualifiers::GCNone;
-    case Qualifiers::OCL_Autoreleasing: llvm_unreachable("autoreleasing ivar?");
-    case Qualifiers::OCL_None: llvm_unreachable("known nonzero");
-    }
-    llvm_unreachable("bad objc ownership");
-  }
-
-  // Treat unqualified retainable pointers as strong.
-  if (FQT->isObjCObjectPointerType() || FQT->isBlockPointerType())
-    return Qualifiers::Strong;
-
-  // Walk into C pointer types, but only in GC.
-  if (Ctx.getLangOpts().getGC() != LangOptions::NonGC) {
-    if (const PointerType *PT = FQT->getAs<PointerType>())
-      return GetGCAttrTypeForType(Ctx, PT->getPointeeType(), /*pointee*/ true);
-  }
-
-  return Qualifiers::GCNone;
-}
-
-namespace {
-  struct IvarInfo {
-    CharUnits Offset;
-    uint64_t SizeInWords;
-    IvarInfo(CharUnits offset, uint64_t sizeInWords)
-      : Offset(offset), SizeInWords(sizeInWords) {}
-
-    // Allow sorting based on byte pos.
-    bool operator<(const IvarInfo &other) const {
-      return Offset < other.Offset;
-    }
-  };
-
-  /// A helper class for building GC layout strings.
-  class IvarLayoutBuilder {
-    CodeGenModule &CGM;
-
-    /// The start of the layout.  Offsets will be relative to this value,
-    /// and entries less than this value will be silently discarded.
-    CharUnits InstanceBegin;
-
-    /// The end of the layout.  Offsets will never exceed this value.
-    CharUnits InstanceEnd;
-
-    /// Whether we're generating the strong layout or the weak layout.
-    bool ForStrongLayout;
-
-    /// Whether the offsets in IvarsInfo might be out-of-order.
-    bool IsDisordered = false;
-
-    llvm::SmallVector<IvarInfo, 8> IvarsInfo;
-
-  public:
-    IvarLayoutBuilder(CodeGenModule &CGM, CharUnits instanceBegin,
-                      CharUnits instanceEnd, bool forStrongLayout)
-      : CGM(CGM), InstanceBegin(instanceBegin), InstanceEnd(instanceEnd),
-        ForStrongLayout(forStrongLayout) {
-    }
-
-    void visitRecord(const RecordType *RT, CharUnits offset);
-
-    template <class Iterator, class GetOffsetFn>
-    void visitAggregate(Iterator begin, Iterator end,
-                        CharUnits aggrOffset,
-                        const GetOffsetFn &getOffset);
-
-    void visitField(const FieldDecl *field, CharUnits offset);
-
-    /// Add the layout of a block implementation.
-    void visitBlock(const CGBlockInfo &blockInfo);
-
-    /// Is there any information for an interesting bitmap?
-    bool hasBitmapData() const { return !IvarsInfo.empty(); }
-
-    llvm::Constant *buildBitmap(CGObjCCommonMac &CGObjC,
-                                llvm::SmallVectorImpl<unsigned char> &buffer);
-
-    static void dump(ArrayRef<unsigned char> buffer) {
-      const unsigned char *s = buffer.data();
-      for (unsigned i = 0, e = buffer.size(); i < e; i++)
-        if (!(s[i] & 0xf0))
-          printf("0x0%x%s", s[i], s[i] != 0 ? ", " : "");
-        else
-          printf("0x%x%s",  s[i], s[i] != 0 ? ", " : "");
-      printf("\n");
-    }
-  };
-} // end anonymous namespace
-
-llvm::Constant *CGObjCCommonMac::BuildGCBlockLayout(CodeGenModule &CGM,
-                                                const CGBlockInfo &blockInfo) {
-
-  llvm::Constant *nullPtr = llvm::Constant::getNullValue(CGM.Int8PtrTy);
-  if (CGM.getLangOpts().getGC() == LangOptions::NonGC)
-    return nullPtr;
-
-  IvarLayoutBuilder builder(CGM, CharUnits::Zero(), blockInfo.BlockSize,
-                            /*for strong layout*/ true);
-
-  builder.visitBlock(blockInfo);
-
-  if (!builder.hasBitmapData())
-    return nullPtr;
-
-  llvm::SmallVector<unsigned char, 32> buffer;
-  llvm::Constant *C = builder.buildBitmap(*this, buffer);
-  if (CGM.getLangOpts().ObjCGCBitmapPrint && !buffer.empty()) {
-    printf("\n block variable layout for block: ");
-    builder.dump(buffer);
-  }
-
-  return C;
-}
-
-void IvarLayoutBuilder::visitBlock(const CGBlockInfo &blockInfo) {
-  // __isa is the first field in block descriptor and must assume by runtime's
-  // convention that it is GC'able.
-  IvarsInfo.push_back(IvarInfo(CharUnits::Zero(), 1));
-
-  const BlockDecl *blockDecl = blockInfo.getBlockDecl();
-
-  // Ignore the optional 'this' capture: C++ objects are not assumed
-  // to be GC'ed.
-
-  CharUnits lastFieldOffset;
-
-  // Walk the captured variables.
-  for (const auto &CI : blockDecl->captures()) {
-    const VarDecl *variable = CI.getVariable();
-    QualType type = variable->getType();
-
-    const CGBlockInfo::Capture &capture = blockInfo.getCapture(variable);
-
-    // Ignore constant captures.
-    if (capture.isConstant()) continue;
-
-    CharUnits fieldOffset = capture.getOffset();
-
-    // Block fields are not necessarily ordered; if we detect that we're
-    // adding them out-of-order, make sure we sort later.
-    if (fieldOffset < lastFieldOffset)
-      IsDisordered = true;
-    lastFieldOffset = fieldOffset;
-
-    // __block variables are passed by their descriptor address.
-    if (CI.isByRef()) {
-      IvarsInfo.push_back(IvarInfo(fieldOffset, /*size in words*/ 1));
-      continue;
-    }
-
-    assert(!type->isArrayType() && "array variable should not be caught");
-    if (const RecordType *record = type->getAs<RecordType>()) {
-      visitRecord(record, fieldOffset);
-      continue;
-    }
-
-    Qualifiers::GC GCAttr = GetGCAttrTypeForType(CGM.getContext(), type);
-
-    if (GCAttr == Qualifiers::Strong) {
-      assert(CGM.getContext().getTypeSize(type)
-                == CGM.getTarget().getPointerWidth(0));
-      IvarsInfo.push_back(IvarInfo(fieldOffset, /*size in words*/ 1));
-    }
-  }
-}
-
-/// getBlockCaptureLifetime - This routine returns life time of the captured
-/// block variable for the purpose of block layout meta-data generation. FQT is
-/// the type of the variable captured in the block.
-Qualifiers::ObjCLifetime CGObjCCommonMac::getBlockCaptureLifetime(QualType FQT,
-                                                                  bool ByrefLayout) {
-  // If it has an ownership qualifier, we're done.
-  if (auto lifetime = FQT.getObjCLifetime())
-    return lifetime;
-
-  // If it doesn't, and this is ARC, it has no ownership.
-  if (CGM.getLangOpts().ObjCAutoRefCount)
-    return Qualifiers::OCL_None;
-
-  // In MRC, retainable pointers are owned by non-__block variables.
-  if (FQT->isObjCObjectPointerType() || FQT->isBlockPointerType())
-    return ByrefLayout ? Qualifiers::OCL_ExplicitNone : Qualifiers::OCL_Strong;
-
-  return Qualifiers::OCL_None;
-}
-
-void CGObjCCommonMac::UpdateRunSkipBlockVars(bool IsByref,
-                                             Qualifiers::ObjCLifetime LifeTime,
-                                             CharUnits FieldOffset,
-                                             CharUnits FieldSize) {
-  // __block variables are passed by their descriptor address.
-  if (IsByref)
-    RunSkipBlockVars.push_back(RUN_SKIP(BLOCK_LAYOUT_BYREF, FieldOffset,
-                                        FieldSize));
-  else if (LifeTime == Qualifiers::OCL_Strong)
-    RunSkipBlockVars.push_back(RUN_SKIP(BLOCK_LAYOUT_STRONG, FieldOffset,
-                                        FieldSize));
-  else if (LifeTime == Qualifiers::OCL_Weak)
-    RunSkipBlockVars.push_back(RUN_SKIP(BLOCK_LAYOUT_WEAK, FieldOffset,
-                                        FieldSize));
-  else if (LifeTime == Qualifiers::OCL_ExplicitNone)
-    RunSkipBlockVars.push_back(RUN_SKIP(BLOCK_LAYOUT_UNRETAINED, FieldOffset,
-                                        FieldSize));
-  else
-    RunSkipBlockVars.push_back(RUN_SKIP(BLOCK_LAYOUT_NON_OBJECT_BYTES,
-                                        FieldOffset,
-                                        FieldSize));
-}
-
-void CGObjCCommonMac::BuildRCRecordLayout(const llvm::StructLayout *RecLayout,
-                                          const RecordDecl *RD,
-                                          ArrayRef<const FieldDecl*> RecFields,
-                                          CharUnits BytePos, bool &HasUnion,
-                                          bool ByrefLayout) {
-  bool IsUnion = (RD && RD->isUnion());
-  CharUnits MaxUnionSize = CharUnits::Zero();
-  const FieldDecl *MaxField = nullptr;
-  const FieldDecl *LastFieldBitfieldOrUnnamed = nullptr;
-  CharUnits MaxFieldOffset = CharUnits::Zero();
-  CharUnits LastBitfieldOrUnnamedOffset = CharUnits::Zero();
-
-  if (RecFields.empty())
-    return;
-  unsigned ByteSizeInBits = CGM.getTarget().getCharWidth();
-
-  for (unsigned i = 0, e = RecFields.size(); i != e; ++i) {
-    const FieldDecl *Field = RecFields[i];
-    // Note that 'i' here is actually the field index inside RD of Field,
-    // although this dependency is hidden.
-    const ASTRecordLayout &RL = CGM.getContext().getASTRecordLayout(RD);
-    CharUnits FieldOffset =
-      CGM.getContext().toCharUnitsFromBits(RL.getFieldOffset(i));
-
-    // Skip over unnamed or bitfields
-    if (!Field->getIdentifier() || Field->isBitField()) {
-      LastFieldBitfieldOrUnnamed = Field;
-      LastBitfieldOrUnnamedOffset = FieldOffset;
-      continue;
-    }
-
-    LastFieldBitfieldOrUnnamed = nullptr;
-    QualType FQT = Field->getType();
-    if (FQT->isRecordType() || FQT->isUnionType()) {
-      if (FQT->isUnionType())
-        HasUnion = true;
-
-      BuildRCBlockVarRecordLayout(FQT->getAs<RecordType>(),
-                                  BytePos + FieldOffset, HasUnion);
-      continue;
-    }
-
-    if (const ArrayType *Array = CGM.getContext().getAsArrayType(FQT)) {
-      const ConstantArrayType *CArray =
-        dyn_cast_or_null<ConstantArrayType>(Array);
-      uint64_t ElCount = CArray->getSize().getZExtValue();
-      assert(CArray && "only array with known element size is supported");
-      FQT = CArray->getElementType();
-      while (const ArrayType *Array = CGM.getContext().getAsArrayType(FQT)) {
-        const ConstantArrayType *CArray =
-          dyn_cast_or_null<ConstantArrayType>(Array);
-        ElCount *= CArray->getSize().getZExtValue();
-        FQT = CArray->getElementType();
-      }
-      if (FQT->isRecordType() && ElCount) {
-        int OldIndex = RunSkipBlockVars.size() - 1;
-        const RecordType *RT = FQT->getAs<RecordType>();
-        BuildRCBlockVarRecordLayout(RT, BytePos + FieldOffset,
-                                    HasUnion);
-
-        // Replicate layout information for each array element. Note that
-        // one element is already done.
-        uint64_t ElIx = 1;
-        for (int FirstIndex = RunSkipBlockVars.size() - 1 ;ElIx < ElCount; ElIx++) {
-          CharUnits Size = CGM.getContext().getTypeSizeInChars(RT);
-          for (int i = OldIndex+1; i <= FirstIndex; ++i)
-            RunSkipBlockVars.push_back(
-              RUN_SKIP(RunSkipBlockVars[i].opcode,
-              RunSkipBlockVars[i].block_var_bytepos + Size*ElIx,
-              RunSkipBlockVars[i].block_var_size));
-        }
-        continue;
-      }
-    }
-    CharUnits FieldSize = CGM.getContext().getTypeSizeInChars(Field->getType());
-    if (IsUnion) {
-      CharUnits UnionIvarSize = FieldSize;
-      if (UnionIvarSize > MaxUnionSize) {
-        MaxUnionSize = UnionIvarSize;
-        MaxField = Field;
-        MaxFieldOffset = FieldOffset;
-      }
-    } else {
-      UpdateRunSkipBlockVars(false,
-                             getBlockCaptureLifetime(FQT, ByrefLayout),
-                             BytePos + FieldOffset,
-                             FieldSize);
-    }
-  }
-
-  if (LastFieldBitfieldOrUnnamed) {
-    if (LastFieldBitfieldOrUnnamed->isBitField()) {
-      // Last field was a bitfield. Must update the info.
-      uint64_t BitFieldSize
-        = LastFieldBitfieldOrUnnamed->getBitWidthValue(CGM.getContext());
-      unsigned UnsSize = (BitFieldSize / ByteSizeInBits) +
-                        ((BitFieldSize % ByteSizeInBits) != 0);
-      CharUnits Size = CharUnits::fromQuantity(UnsSize);
-      Size += LastBitfieldOrUnnamedOffset;
-      UpdateRunSkipBlockVars(false,
-                             getBlockCaptureLifetime(LastFieldBitfieldOrUnnamed->getType(),
-                                                     ByrefLayout),
-                             BytePos + LastBitfieldOrUnnamedOffset,
-                             Size);
-    } else {
-      assert(!LastFieldBitfieldOrUnnamed->getIdentifier() &&"Expected unnamed");
-      // Last field was unnamed. Must update skip info.
-      CharUnits FieldSize
-        = CGM.getContext().getTypeSizeInChars(LastFieldBitfieldOrUnnamed->getType());
-      UpdateRunSkipBlockVars(false,
-                             getBlockCaptureLifetime(LastFieldBitfieldOrUnnamed->getType(),
-                                                     ByrefLayout),
-                             BytePos + LastBitfieldOrUnnamedOffset,
-                             FieldSize);
-    }
-  }
-
-  if (MaxField)
-    UpdateRunSkipBlockVars(false,
-                           getBlockCaptureLifetime(MaxField->getType(), ByrefLayout),
-                           BytePos + MaxFieldOffset,
-                           MaxUnionSize);
-}
-
-void CGObjCCommonMac::BuildRCBlockVarRecordLayout(const RecordType *RT,
-                                                  CharUnits BytePos,
-                                                  bool &HasUnion,
-                                                  bool ByrefLayout) {
-  const RecordDecl *RD = RT->getDecl();
-  SmallVector<const FieldDecl*, 16> Fields(RD->fields());
-  llvm::Type *Ty = CGM.getTypes().ConvertType(QualType(RT, 0));
-  const llvm::StructLayout *RecLayout =
-    CGM.getDataLayout().getStructLayout(cast<llvm::StructType>(Ty));
-
-  BuildRCRecordLayout(RecLayout, RD, Fields, BytePos, HasUnion, ByrefLayout);
-}
-
-/// InlineLayoutInstruction - This routine produce an inline instruction for the
-/// block variable layout if it can. If not, it returns 0. Rules are as follow:
-/// If ((uintptr_t) layout) < (1 << 12), the layout is inline. In the 64bit world,
-/// an inline layout of value 0x0000000000000xyz is interpreted as follows:
-/// x captured object pointers of BLOCK_LAYOUT_STRONG. Followed by
-/// y captured object of BLOCK_LAYOUT_BYREF. Followed by
-/// z captured object of BLOCK_LAYOUT_WEAK. If any of the above is missing, zero
-/// replaces it. For example, 0x00000x00 means x BLOCK_LAYOUT_STRONG and no
-/// BLOCK_LAYOUT_BYREF and no BLOCK_LAYOUT_WEAK objects are captured.
-uint64_t CGObjCCommonMac::InlineLayoutInstruction(
-                                    SmallVectorImpl<unsigned char> &Layout) {
-  uint64_t Result = 0;
-  if (Layout.size() <= 3) {
-    unsigned size = Layout.size();
-    unsigned strong_word_count = 0, byref_word_count=0, weak_word_count=0;
-    unsigned char inst;
-    enum BLOCK_LAYOUT_OPCODE opcode ;
-    switch (size) {
-      case 3:
-        inst = Layout[0];
-        opcode = (enum BLOCK_LAYOUT_OPCODE) (inst >> 4);
-        if (opcode == BLOCK_LAYOUT_STRONG)
-          strong_word_count = (inst & 0xF)+1;
-        else
-          return 0;
-        inst = Layout[1];
-        opcode = (enum BLOCK_LAYOUT_OPCODE) (inst >> 4);
-        if (opcode == BLOCK_LAYOUT_BYREF)
-          byref_word_count = (inst & 0xF)+1;
-        else
-          return 0;
-        inst = Layout[2];
-        opcode = (enum BLOCK_LAYOUT_OPCODE) (inst >> 4);
-        if (opcode == BLOCK_LAYOUT_WEAK)
-          weak_word_count = (inst & 0xF)+1;
-        else
-          return 0;
-        break;
-
-      case 2:
-        inst = Layout[0];
-        opcode = (enum BLOCK_LAYOUT_OPCODE) (inst >> 4);
-        if (opcode == BLOCK_LAYOUT_STRONG) {
-          strong_word_count = (inst & 0xF)+1;
-          inst = Layout[1];
-          opcode = (enum BLOCK_LAYOUT_OPCODE) (inst >> 4);
-          if (opcode == BLOCK_LAYOUT_BYREF)
-            byref_word_count = (inst & 0xF)+1;
-          else if (opcode == BLOCK_LAYOUT_WEAK)
-            weak_word_count = (inst & 0xF)+1;
-          else
-            return 0;
-        }
-        else if (opcode == BLOCK_LAYOUT_BYREF) {
-          byref_word_count = (inst & 0xF)+1;
-          inst = Layout[1];
-          opcode = (enum BLOCK_LAYOUT_OPCODE) (inst >> 4);
-          if (opcode == BLOCK_LAYOUT_WEAK)
-            weak_word_count = (inst & 0xF)+1;
-          else
-            return 0;
-        }
-        else
-          return 0;
-        break;
-
-      case 1:
-        inst = Layout[0];
-        opcode = (enum BLOCK_LAYOUT_OPCODE) (inst >> 4);
-        if (opcode == BLOCK_LAYOUT_STRONG)
-          strong_word_count = (inst & 0xF)+1;
-        else if (opcode == BLOCK_LAYOUT_BYREF)
-          byref_word_count = (inst & 0xF)+1;
-        else if (opcode == BLOCK_LAYOUT_WEAK)
-          weak_word_count = (inst & 0xF)+1;
-        else
-          return 0;
-        break;
-
-      default:
-        return 0;
-    }
-
-    // Cannot inline when any of the word counts is 15. Because this is one less
-    // than the actual work count (so 15 means 16 actual word counts),
-    // and we can only display 0 thru 15 word counts.
-    if (strong_word_count == 16 || byref_word_count == 16 || weak_word_count == 16)
-      return 0;
-
-    unsigned count =
-      (strong_word_count != 0) + (byref_word_count != 0) + (weak_word_count != 0);
-
-    if (size == count) {
-      if (strong_word_count)
-        Result = strong_word_count;
-      Result <<= 4;
-      if (byref_word_count)
-        Result += byref_word_count;
-      Result <<= 4;
-      if (weak_word_count)
-        Result += weak_word_count;
-    }
-  }
-  return Result;
-}
-
-llvm::Constant *CGObjCCommonMac::getBitmapBlockLayout(bool ComputeByrefLayout) {
-  llvm::Constant *nullPtr = llvm::Constant::getNullValue(CGM.Int8PtrTy);
-  if (RunSkipBlockVars.empty())
-    return nullPtr;
-  unsigned WordSizeInBits = CGM.getTarget().getPointerWidth(0);
-  unsigned ByteSizeInBits = CGM.getTarget().getCharWidth();
-  unsigned WordSizeInBytes = WordSizeInBits/ByteSizeInBits;
-
-  // Sort on byte position; captures might not be allocated in order,
-  // and unions can do funny things.
-  llvm::array_pod_sort(RunSkipBlockVars.begin(), RunSkipBlockVars.end());
-  SmallVector<unsigned char, 16> Layout;
-
-  unsigned size = RunSkipBlockVars.size();
-  for (unsigned i = 0; i < size; i++) {
-    enum BLOCK_LAYOUT_OPCODE opcode = RunSkipBlockVars[i].opcode;
-    CharUnits start_byte_pos = RunSkipBlockVars[i].block_var_bytepos;
-    CharUnits end_byte_pos = start_byte_pos;
-    unsigned j = i+1;
-    while (j < size) {
-      if (opcode == RunSkipBlockVars[j].opcode) {
-        end_byte_pos = RunSkipBlockVars[j++].block_var_bytepos;
-        i++;
-      }
-      else
-        break;
-    }
-    CharUnits size_in_bytes =
-    end_byte_pos - start_byte_pos + RunSkipBlockVars[j-1].block_var_size;
-    if (j < size) {
-      CharUnits gap =
-      RunSkipBlockVars[j].block_var_bytepos -
-      RunSkipBlockVars[j-1].block_var_bytepos - RunSkipBlockVars[j-1].block_var_size;
-      size_in_bytes += gap;
-    }
-    CharUnits residue_in_bytes = CharUnits::Zero();
-    if (opcode == BLOCK_LAYOUT_NON_OBJECT_BYTES) {
-      residue_in_bytes = size_in_bytes % WordSizeInBytes;
-      size_in_bytes -= residue_in_bytes;
-      opcode = BLOCK_LAYOUT_NON_OBJECT_WORDS;
-    }
-
-    unsigned size_in_words = size_in_bytes.getQuantity() / WordSizeInBytes;
-    while (size_in_words >= 16) {
-      // Note that value in imm. is one less that the actual
-      // value. So, 0xf means 16 words follow!
-      unsigned char inst = (opcode << 4) | 0xf;
-      Layout.push_back(inst);
-      size_in_words -= 16;
-    }
-    if (size_in_words > 0) {
-      // Note that value in imm. is one less that the actual
-      // value. So, we subtract 1 away!
-      unsigned char inst = (opcode << 4) | (size_in_words-1);
-      Layout.push_back(inst);
-    }
-    if (residue_in_bytes > CharUnits::Zero()) {
-      unsigned char inst =
-      (BLOCK_LAYOUT_NON_OBJECT_BYTES << 4) | (residue_in_bytes.getQuantity()-1);
-      Layout.push_back(inst);
-    }
-  }
-
-  while (!Layout.empty()) {
-    unsigned char inst = Layout.back();
-    enum BLOCK_LAYOUT_OPCODE opcode = (enum BLOCK_LAYOUT_OPCODE) (inst >> 4);
-    if (opcode == BLOCK_LAYOUT_NON_OBJECT_BYTES || opcode == BLOCK_LAYOUT_NON_OBJECT_WORDS)
-      Layout.pop_back();
-    else
-      break;
-  }
-
-  uint64_t Result = InlineLayoutInstruction(Layout);
-  if (Result != 0) {
-    // Block variable layout instruction has been inlined.
-    if (CGM.getLangOpts().ObjCGCBitmapPrint) {
-      if (ComputeByrefLayout)
-        printf("\n Inline BYREF variable layout: ");
-      else
-        printf("\n Inline block variable layout: ");
-      printf("0x0%" PRIx64 "", Result);
-      if (auto numStrong = (Result & 0xF00) >> 8)
-        printf(", BL_STRONG:%d", (int) numStrong);
-      if (auto numByref = (Result & 0x0F0) >> 4)
-        printf(", BL_BYREF:%d", (int) numByref);
-      if (auto numWeak = (Result & 0x00F) >> 0)
-        printf(", BL_WEAK:%d", (int) numWeak);
-      printf(", BL_OPERATOR:0\n");
-    }
-    return llvm::ConstantInt::get(CGM.IntPtrTy, Result);
-  }
-
-  unsigned char inst = (BLOCK_LAYOUT_OPERATOR << 4) | 0;
-  Layout.push_back(inst);
-  std::string BitMap;
-  for (unsigned i = 0, e = Layout.size(); i != e; i++)
-    BitMap += Layout[i];
-
-  if (CGM.getLangOpts().ObjCGCBitmapPrint) {
-    if (ComputeByrefLayout)
-      printf("\n Byref variable layout: ");
-    else
-      printf("\n Block variable layout: ");
-    for (unsigned i = 0, e = BitMap.size(); i != e; i++) {
-      unsigned char inst = BitMap[i];
-      enum BLOCK_LAYOUT_OPCODE opcode = (enum BLOCK_LAYOUT_OPCODE) (inst >> 4);
-      unsigned delta = 1;
-      switch (opcode) {
-        case BLOCK_LAYOUT_OPERATOR:
-          printf("BL_OPERATOR:");
-          delta = 0;
-          break;
-        case BLOCK_LAYOUT_NON_OBJECT_BYTES:
-          printf("BL_NON_OBJECT_BYTES:");
-          break;
-        case BLOCK_LAYOUT_NON_OBJECT_WORDS:
-          printf("BL_NON_OBJECT_WORD:");
-          break;
-        case BLOCK_LAYOUT_STRONG:
-          printf("BL_STRONG:");
-          break;
-        case BLOCK_LAYOUT_BYREF:
-          printf("BL_BYREF:");
-          break;
-        case BLOCK_LAYOUT_WEAK:
-          printf("BL_WEAK:");
-          break;
-        case BLOCK_LAYOUT_UNRETAINED:
-          printf("BL_UNRETAINED:");
-          break;
-      }
-      // Actual value of word count is one more that what is in the imm.
-      // field of the instruction
-      printf("%d", (inst & 0xf) + delta);
-      if (i < e-1)
-        printf(", ");
-      else
-        printf("\n");
-    }
-  }
-
-  auto *Entry = CreateCStringLiteral(BitMap, ObjCLabelType::ClassName,
-                                     /*ForceNonFragileABI=*/true,
-                                     /*NullTerminate=*/false);
-  return getConstantGEP(VMContext, Entry, 0, 0);
-}
-
-static std::string getBlockLayoutInfoString(
-    const SmallVectorImpl<CGObjCCommonMac::RUN_SKIP> &RunSkipBlockVars,
-    bool HasCopyDisposeHelpers) {
-  std::string Str;
-  for (const CGObjCCommonMac::RUN_SKIP &R : RunSkipBlockVars) {
-    if (R.opcode == CGObjCCommonMac::BLOCK_LAYOUT_UNRETAINED) {
-      // Copy/dispose helpers don't have any information about
-      // __unsafe_unretained captures, so unconditionally concatenate a string.
-      Str += "u";
-    } else if (HasCopyDisposeHelpers) {
-      // Information about __strong, __weak, or byref captures has already been
-      // encoded into the names of the copy/dispose helpers. We have to add a
-      // string here only when the copy/dispose helpers aren't generated (which
-      // happens when the block is non-escaping).
-      continue;
-    } else {
-      switch (R.opcode) {
-      case CGObjCCommonMac::BLOCK_LAYOUT_STRONG:
-        Str += "s";
-        break;
-      case CGObjCCommonMac::BLOCK_LAYOUT_BYREF:
-        Str += "r";
-        break;
-      case CGObjCCommonMac::BLOCK_LAYOUT_WEAK:
-        Str += "w";
-        break;
-      default:
-        continue;
-      }
-    }
-    Str += llvm::to_string(R.block_var_bytepos.getQuantity());
-    Str += "l" + llvm::to_string(R.block_var_size.getQuantity());
-  }
-  return Str;
-}
-
-void CGObjCCommonMac::fillRunSkipBlockVars(CodeGenModule &CGM,
-                                           const CGBlockInfo &blockInfo) {
-  assert(CGM.getLangOpts().getGC() == LangOptions::NonGC);
-
-  RunSkipBlockVars.clear();
-  bool hasUnion = false;
-
-  unsigned WordSizeInBits = CGM.getTarget().getPointerWidth(0);
-  unsigned ByteSizeInBits = CGM.getTarget().getCharWidth();
-  unsigned WordSizeInBytes = WordSizeInBits/ByteSizeInBits;
-
-  const BlockDecl *blockDecl = blockInfo.getBlockDecl();
-
-  // Calculate the basic layout of the block structure.
-  const llvm::StructLayout *layout =
-  CGM.getDataLayout().getStructLayout(blockInfo.StructureType);
-
-  // Ignore the optional 'this' capture: C++ objects are not assumed
-  // to be GC'ed.
-  if (blockInfo.BlockHeaderForcedGapSize != CharUnits::Zero())
-    UpdateRunSkipBlockVars(false, Qualifiers::OCL_None,
-                           blockInfo.BlockHeaderForcedGapOffset,
-                           blockInfo.BlockHeaderForcedGapSize);
-  // Walk the captured variables.
-  for (const auto &CI : blockDecl->captures()) {
-    const VarDecl *variable = CI.getVariable();
-    QualType type = variable->getType();
-
-    const CGBlockInfo::Capture &capture = blockInfo.getCapture(variable);
-
-    // Ignore constant captures.
-    if (capture.isConstant()) continue;
-
-    CharUnits fieldOffset =
-       CharUnits::fromQuantity(layout->getElementOffset(capture.getIndex()));
-
-    assert(!type->isArrayType() && "array variable should not be caught");
-    if (!CI.isByRef())
-      if (const RecordType *record = type->getAs<RecordType>()) {
-        BuildRCBlockVarRecordLayout(record, fieldOffset, hasUnion);
-        continue;
-      }
-    CharUnits fieldSize;
-    if (CI.isByRef())
-      fieldSize = CharUnits::fromQuantity(WordSizeInBytes);
-    else
-      fieldSize = CGM.getContext().getTypeSizeInChars(type);
-    UpdateRunSkipBlockVars(CI.isByRef(), getBlockCaptureLifetime(type, false),
-                           fieldOffset, fieldSize);
-  }
-}
-
-llvm::Constant *
-CGObjCCommonMac::BuildRCBlockLayout(CodeGenModule &CGM,
-                                    const CGBlockInfo &blockInfo) {
-  fillRunSkipBlockVars(CGM, blockInfo);
-  return getBitmapBlockLayout(false);
-}
-
-std::string CGObjCCommonMac::getRCBlockLayoutStr(CodeGenModule &CGM,
-                                                 const CGBlockInfo &blockInfo) {
-  fillRunSkipBlockVars(CGM, blockInfo);
-  return getBlockLayoutInfoString(RunSkipBlockVars,
-                                  blockInfo.needsCopyDisposeHelpers());
-}
-
-llvm::Constant *CGObjCCommonMac::BuildByrefLayout(CodeGen::CodeGenModule &CGM,
-                                                  QualType T) {
-  assert(CGM.getLangOpts().getGC() == LangOptions::NonGC);
-  assert(!T->isArrayType() && "__block array variable should not be caught");
-  CharUnits fieldOffset;
-  RunSkipBlockVars.clear();
-  bool hasUnion = false;
-  if (const RecordType *record = T->getAs<RecordType>()) {
-    BuildRCBlockVarRecordLayout(record, fieldOffset, hasUnion, true /*ByrefLayout */);
-    llvm::Constant *Result = getBitmapBlockLayout(true);
-    if (isa<llvm::ConstantInt>(Result))
-      Result = llvm::ConstantExpr::getIntToPtr(Result, CGM.Int8PtrTy);
-    return Result;
-  }
-  llvm::Constant *nullPtr = llvm::Constant::getNullValue(CGM.Int8PtrTy);
-  return nullPtr;
-}
-
-llvm::Value *CGObjCMac::GenerateProtocolRef(CodeGenFunction &CGF,
-                                            const ObjCProtocolDecl *PD) {
-  // FIXME: I don't understand why gcc generates this, or where it is
-  // resolved. Investigate. Its also wasteful to look this up over and over.
-  LazySymbols.insert(&CGM.getContext().Idents.get("Protocol"));
-
-  return llvm::ConstantExpr::getBitCast(GetProtocolRef(PD),
-                                        ObjCTypes.getExternalProtocolPtrTy());
-}
-
-void CGObjCCommonMac::GenerateProtocol(const ObjCProtocolDecl *PD) {
-  // FIXME: We shouldn't need this, the protocol decl should contain enough
-  // information to tell us whether this was a declaration or a definition.
-  DefinedProtocols.insert(PD->getIdentifier());
-
-  // If we have generated a forward reference to this protocol, emit
-  // it now. Otherwise do nothing, the protocol objects are lazily
-  // emitted.
-  if (Protocols.count(PD->getIdentifier()))
-    GetOrEmitProtocol(PD);
-}
-
-llvm::Constant *CGObjCCommonMac::GetProtocolRef(const ObjCProtocolDecl *PD) {
-  if (DefinedProtocols.count(PD->getIdentifier()))
-    return GetOrEmitProtocol(PD);
-
-  return GetOrEmitProtocolRef(PD);
-}
-
-llvm::Value *CGObjCCommonMac::EmitClassRefViaRuntime(
-               CodeGenFunction &CGF,
-               const ObjCInterfaceDecl *ID,
-               ObjCCommonTypesHelper &ObjCTypes) {
-  llvm::Constant *lookUpClassFn = ObjCTypes.getLookUpClassFn();
-
-  llvm::Value *className =
-      CGF.CGM.GetAddrOfConstantCString(ID->getObjCRuntimeNameAsString())
-        .getPointer();
-  ASTContext &ctx = CGF.CGM.getContext();
-  className =
-      CGF.Builder.CreateBitCast(className,
-                                CGF.ConvertType(
-                                  ctx.getPointerType(ctx.CharTy.withConst())));
-  llvm::CallInst *call = CGF.Builder.CreateCall(lookUpClassFn, className);
-  call->setDoesNotThrow();
-  return call;
-}
-
-/*
-// Objective-C 1.0 extensions
-struct _objc_protocol {
-struct _objc_protocol_extension *isa;
-char *protocol_name;
-struct _objc_protocol_list *protocol_list;
-struct _objc__method_prototype_list *instance_methods;
-struct _objc__method_prototype_list *class_methods
-};
-
-See EmitProtocolExtension().
-*/
-llvm::Constant *CGObjCMac::GetOrEmitProtocol(const ObjCProtocolDecl *PD) {
-  llvm::GlobalVariable *Entry = Protocols[PD->getIdentifier()];
-
-  // Early exit if a defining object has already been generated.
-  if (Entry && Entry->hasInitializer())
-    return Entry;
-
-  // Use the protocol definition, if there is one.
-  if (const ObjCProtocolDecl *Def = PD->getDefinition())
-    PD = Def;
-
-  // FIXME: I don't understand why gcc generates this, or where it is
-  // resolved. Investigate. Its also wasteful to look this up over and over.
-  LazySymbols.insert(&CGM.getContext().Idents.get("Protocol"));
-
-  // Construct method lists.
-  auto methodLists = ProtocolMethodLists::get(PD);
-
-  ConstantInitBuilder builder(CGM);
-  auto values = builder.beginStruct(ObjCTypes.ProtocolTy);
-  values.add(EmitProtocolExtension(PD, methodLists));
-  values.add(GetClassName(PD->getObjCRuntimeNameAsString()));
-  values.add(EmitProtocolList("OBJC_PROTOCOL_REFS_" + PD->getName(),
-                              PD->protocol_begin(), PD->protocol_end()));
-  values.add(methodLists.emitMethodList(this, PD,
-                              ProtocolMethodLists::RequiredInstanceMethods));
-  values.add(methodLists.emitMethodList(this, PD,
-                              ProtocolMethodLists::RequiredClassMethods));
-
-  if (Entry) {
-    // Already created, update the initializer.
-    assert(Entry->hasPrivateLinkage());
-    values.finishAndSetAsInitializer(Entry);
-  } else {
-    Entry = values.finishAndCreateGlobal("OBJC_PROTOCOL_" + PD->getName(),
-                                         CGM.getPointerAlign(),
-                                         /*constant*/ false,
-                                         llvm::GlobalValue::PrivateLinkage);
-    Entry->setSection("__OBJC,__protocol,regular,no_dead_strip");
-
-    Protocols[PD->getIdentifier()] = Entry;
-  }
-  CGM.addCompilerUsedGlobal(Entry);
-
-  return Entry;
-}
-
-llvm::Constant *CGObjCMac::GetOrEmitProtocolRef(const ObjCProtocolDecl *PD) {
-  llvm::GlobalVariable *&Entry = Protocols[PD->getIdentifier()];
-
-  if (!Entry) {
-    // We use the initializer as a marker of whether this is a forward
-    // reference or not. At module finalization we add the empty
-    // contents for protocols which were referenced but never defined.
-    Entry = new llvm::GlobalVariable(CGM.getModule(), ObjCTypes.ProtocolTy,
-                                     false, llvm::GlobalValue::PrivateLinkage,
-                                     nullptr, "OBJC_PROTOCOL_" + PD->getName());
-    Entry->setSection("__OBJC,__protocol,regular,no_dead_strip");
-    // FIXME: Is this necessary? Why only for protocol?
-    Entry->setAlignment(4);
-  }
-
-  return Entry;
-}
-
-/*
-  struct _objc_protocol_extension {
-  uint32_t size;
-  struct objc_method_description_list *optional_instance_methods;
-  struct objc_method_description_list *optional_class_methods;
-  struct objc_property_list *instance_properties;
-  const char ** extendedMethodTypes;
-  struct objc_property_list *class_properties;
-  };
-*/
-llvm::Constant *
-CGObjCMac::EmitProtocolExtension(const ObjCProtocolDecl *PD,
-                                 const ProtocolMethodLists &methodLists) {
-  auto optInstanceMethods =
-    methodLists.emitMethodList(this, PD,
-                               ProtocolMethodLists::OptionalInstanceMethods);
-  auto optClassMethods =
-    methodLists.emitMethodList(this, PD,
-                               ProtocolMethodLists::OptionalClassMethods);
-
-  auto extendedMethodTypes =
-    EmitProtocolMethodTypes("OBJC_PROTOCOL_METHOD_TYPES_" + PD->getName(),
-                            methodLists.emitExtendedTypesArray(this),
-                            ObjCTypes);
-
-  auto instanceProperties =
-    EmitPropertyList("OBJC_$_PROP_PROTO_LIST_" + PD->getName(), nullptr, PD,
-                     ObjCTypes, false);
-  auto classProperties =
-    EmitPropertyList("OBJC_$_CLASS_PROP_PROTO_LIST_" + PD->getName(), nullptr,
-                     PD, ObjCTypes, true);
-
-  // Return null if no extension bits are used.
-  if (optInstanceMethods->isNullValue() &&
-      optClassMethods->isNullValue() &&
-      extendedMethodTypes->isNullValue() &&
-      instanceProperties->isNullValue() &&
-      classProperties->isNullValue()) {
-    return llvm::Constant::getNullValue(ObjCTypes.ProtocolExtensionPtrTy);
-  }
-
-  uint64_t size =
-    CGM.getDataLayout().getTypeAllocSize(ObjCTypes.ProtocolExtensionTy);
-
-  ConstantInitBuilder builder(CGM);
-  auto values = builder.beginStruct(ObjCTypes.ProtocolExtensionTy);
-  values.addInt(ObjCTypes.IntTy, size);
-  values.add(optInstanceMethods);
-  values.add(optClassMethods);
-  values.add(instanceProperties);
-  values.add(extendedMethodTypes);
-  values.add(classProperties);
-
-  // No special section, but goes in llvm.used
-  return CreateMetadataVar("\01l_OBJC_PROTOCOLEXT_" + PD->getName(), values,
-                           StringRef(), CGM.getPointerAlign(), true);
-}
-
-/*
-  struct objc_protocol_list {
-    struct objc_protocol_list *next;
-    long count;
-    Protocol *list[];
-  };
-*/
-llvm::Constant *
-CGObjCMac::EmitProtocolList(Twine name,
-                            ObjCProtocolDecl::protocol_iterator begin,
-                            ObjCProtocolDecl::protocol_iterator end) {
-  // Just return null for empty protocol lists
-  if (begin == end)
-    return llvm::Constant::getNullValue(ObjCTypes.ProtocolListPtrTy);
-
-  ConstantInitBuilder builder(CGM);
-  auto values = builder.beginStruct();
-
-  // This field is only used by the runtime.
-  values.addNullPointer(ObjCTypes.ProtocolListPtrTy);
-
-  // Reserve a slot for the count.
-  auto countSlot = values.addPlaceholder();
-
-  auto refsArray = values.beginArray(ObjCTypes.ProtocolPtrTy);
-  for (; begin != end; ++begin) {
-    refsArray.add(GetProtocolRef(*begin));
-  }
-  auto count = refsArray.size();
-
-  // This list is null terminated.
-  refsArray.addNullPointer(ObjCTypes.ProtocolPtrTy);
-
-  refsArray.finishAndAddTo(values);
-  values.fillPlaceholderWithInt(countSlot, ObjCTypes.LongTy, count);
-
-  StringRef section;
-  if (CGM.getTriple().isOSBinFormatMachO())
-    section = "__OBJC,__cat_cls_meth,regular,no_dead_strip";
-
-  llvm::GlobalVariable *GV =
-      CreateMetadataVar(name, values, section, CGM.getPointerAlign(), false);
-  return llvm::ConstantExpr::getBitCast(GV, ObjCTypes.ProtocolListPtrTy);
-}
-
-static void
-PushProtocolProperties(llvm::SmallPtrSet<const IdentifierInfo*,16> &PropertySet,
-                       SmallVectorImpl<const ObjCPropertyDecl *> &Properties,
-                       const ObjCProtocolDecl *Proto,
-                       bool IsClassProperty) {
-  for (const auto *P : Proto->protocols())
-    PushProtocolProperties(PropertySet, Properties, P, IsClassProperty);
-
-  for (const auto *PD : Proto->properties()) {
-    if (IsClassProperty != PD->isClassProperty())
-      continue;
-    if (!PropertySet.insert(PD->getIdentifier()).second)
-      continue;
-    Properties.push_back(PD);
-  }
-}
-
-/*
-  struct _objc_property {
-    const char * const name;
-    const char * const attributes;
-  };
-
-  struct _objc_property_list {
-    uint32_t entsize; // sizeof (struct _objc_property)
-    uint32_t prop_count;
-    struct _objc_property[prop_count];
-  };
-*/
-llvm::Constant *CGObjCCommonMac::EmitPropertyList(Twine Name,
-                                       const Decl *Container,
-                                       const ObjCContainerDecl *OCD,
-                                       const ObjCCommonTypesHelper &ObjCTypes,
-                                       bool IsClassProperty) {
-  if (IsClassProperty) {
-    // Make this entry NULL for OS X with deployment target < 10.11, for iOS
-    // with deployment target < 9.0.
-    const llvm::Triple &Triple = CGM.getTarget().getTriple();
-    if ((Triple.isMacOSX() && Triple.isMacOSXVersionLT(10, 11)) ||
-        (Triple.isiOS() && Triple.isOSVersionLT(9)))
-      return llvm::Constant::getNullValue(ObjCTypes.PropertyListPtrTy);
-  }
-
-  SmallVector<const ObjCPropertyDecl *, 16> Properties;
-  llvm::SmallPtrSet<const IdentifierInfo*, 16> PropertySet;
-
-  if (const ObjCInterfaceDecl *OID = dyn_cast<ObjCInterfaceDecl>(OCD))
-    for (const ObjCCategoryDecl *ClassExt : OID->known_extensions())
-      for (auto *PD : ClassExt->properties()) {
-        if (IsClassProperty != PD->isClassProperty())
-          continue;
-        PropertySet.insert(PD->getIdentifier());
-        Properties.push_back(PD);
-      }
-
-  for (const auto *PD : OCD->properties()) {
-    if (IsClassProperty != PD->isClassProperty())
-      continue;
-    // Don't emit duplicate metadata for properties that were already in a
-    // class extension.
-    if (!PropertySet.insert(PD->getIdentifier()).second)
-      continue;
-    Properties.push_back(PD);
-  }
-
-  if (const ObjCInterfaceDecl *OID = dyn_cast<ObjCInterfaceDecl>(OCD)) {
-    for (const auto *P : OID->all_referenced_protocols())
-      PushProtocolProperties(PropertySet, Properties, P, IsClassProperty);
-  }
-  else if (const ObjCCategoryDecl *CD = dyn_cast<ObjCCategoryDecl>(OCD)) {
-    for (const auto *P : CD->protocols())
-      PushProtocolProperties(PropertySet, Properties, P, IsClassProperty);
-  }
-
-  // Return null for empty list.
-  if (Properties.empty())
-    return llvm::Constant::getNullValue(ObjCTypes.PropertyListPtrTy);
-
-  unsigned propertySize =
-    CGM.getDataLayout().getTypeAllocSize(ObjCTypes.PropertyTy);
-
-  ConstantInitBuilder builder(CGM);
-  auto values = builder.beginStruct();
-  values.addInt(ObjCTypes.IntTy, propertySize);
-  values.addInt(ObjCTypes.IntTy, Properties.size());
-  auto propertiesArray = values.beginArray(ObjCTypes.PropertyTy);
-  for (auto PD : Properties) {
-    auto property = propertiesArray.beginStruct(ObjCTypes.PropertyTy);
-    property.add(GetPropertyName(PD->getIdentifier()));
-    property.add(GetPropertyTypeString(PD, Container));
-    property.finishAndAddTo(propertiesArray);
-  }
-  propertiesArray.finishAndAddTo(values);
-
-  StringRef Section;
-  if (CGM.getTriple().isOSBinFormatMachO())
-    Section = (ObjCABI == 2) ? "__DATA, __objc_const"
-                             : "__OBJC,__property,regular,no_dead_strip";
-
-  llvm::GlobalVariable *GV =
-      CreateMetadataVar(Name, values, Section, CGM.getPointerAlign(), true);
-  return llvm::ConstantExpr::getBitCast(GV, ObjCTypes.PropertyListPtrTy);
-}
-
-llvm::Constant *
-CGObjCCommonMac::EmitProtocolMethodTypes(Twine Name,
-                                         ArrayRef<llvm::Constant*> MethodTypes,
-                                         const ObjCCommonTypesHelper &ObjCTypes) {
-  // Return null for empty list.
-  if (MethodTypes.empty())
-    return llvm::Constant::getNullValue(ObjCTypes.Int8PtrPtrTy);
-
-  llvm::ArrayType *AT = llvm::ArrayType::get(ObjCTypes.Int8PtrTy,
-                                             MethodTypes.size());
-  llvm::Constant *Init = llvm::ConstantArray::get(AT, MethodTypes);
-
-  StringRef Section;
-  if (CGM.getTriple().isOSBinFormatMachO() && ObjCABI == 2)
-    Section = "__DATA, __objc_const";
-
-  llvm::GlobalVariable *GV =
-      CreateMetadataVar(Name, Init, Section, CGM.getPointerAlign(), true);
-  return llvm::ConstantExpr::getBitCast(GV, ObjCTypes.Int8PtrPtrTy);
-}
-
-/*
-  struct _objc_category {
-  char *category_name;
-  char *class_name;
-  struct _objc_method_list *instance_methods;
-  struct _objc_method_list *class_methods;
-  struct _objc_protocol_list *protocols;
-  uint32_t size; // <rdar://4585769>
-  struct _objc_property_list *instance_properties;
-  struct _objc_property_list *class_properties;
-  };
-*/
-void CGObjCMac::GenerateCategory(const ObjCCategoryImplDecl *OCD) {
-  unsigned Size = CGM.getDataLayout().getTypeAllocSize(ObjCTypes.CategoryTy);
-
-  // FIXME: This is poor design, the OCD should have a pointer to the category
-  // decl. Additionally, note that Category can be null for the @implementation
-  // w/o an @interface case. Sema should just create one for us as it does for
-  // @implementation so everyone else can live life under a clear blue sky.
-  const ObjCInterfaceDecl *Interface = OCD->getClassInterface();
-  const ObjCCategoryDecl *Category =
-    Interface->FindCategoryDeclaration(OCD->getIdentifier());
-
-  SmallString<256> ExtName;
-  llvm::raw_svector_ostream(ExtName) << Interface->getName() << '_'
-                                     << OCD->getName();
-
-  ConstantInitBuilder Builder(CGM);
-  auto Values = Builder.beginStruct(ObjCTypes.CategoryTy);
-
-  enum {
-    InstanceMethods,
-    ClassMethods,
-    NumMethodLists
-  };
-  SmallVector<const ObjCMethodDecl *, 16> Methods[NumMethodLists];
-  for (const auto *MD : OCD->methods()) {
-    Methods[unsigned(MD->isClassMethod())].push_back(MD);
-  }
-
-  Values.add(GetClassName(OCD->getName()));
-  Values.add(GetClassName(Interface->getObjCRuntimeNameAsString()));
-  LazySymbols.insert(Interface->getIdentifier());
-
-  Values.add(emitMethodList(ExtName, MethodListType::CategoryInstanceMethods,
-                            Methods[InstanceMethods]));
-  Values.add(emitMethodList(ExtName, MethodListType::CategoryClassMethods,
-                            Methods[ClassMethods]));
-  if (Category) {
-    Values.add(
-        EmitProtocolList("OBJC_CATEGORY_PROTOCOLS_" + ExtName.str(),
-                         Category->protocol_begin(), Category->protocol_end()));
-  } else {
-    Values.addNullPointer(ObjCTypes.ProtocolListPtrTy);
-  }
-  Values.addInt(ObjCTypes.IntTy, Size);
-
-  // If there is no category @interface then there can be no properties.
-  if (Category) {
-    Values.add(EmitPropertyList("\01l_OBJC_$_PROP_LIST_" + ExtName.str(),
-                                OCD, Category, ObjCTypes, false));
-    Values.add(EmitPropertyList("\01l_OBJC_$_CLASS_PROP_LIST_" + ExtName.str(),
-                                OCD, Category, ObjCTypes, true));
-  } else {
-    Values.addNullPointer(ObjCTypes.PropertyListPtrTy);
-    Values.addNullPointer(ObjCTypes.PropertyListPtrTy);
-  }
-
-  llvm::GlobalVariable *GV =
-      CreateMetadataVar("OBJC_CATEGORY_" + ExtName.str(), Values,
-                        "__OBJC,__category,regular,no_dead_strip",
-                        CGM.getPointerAlign(), true);
-  DefinedCategories.push_back(GV);
-  DefinedCategoryNames.insert(llvm::CachedHashString(ExtName));
-  // method definition entries must be clear for next implementation.
-  MethodDefinitions.clear();
-}
-
-enum FragileClassFlags {
-  /// Apparently: is not a meta-class.
-  FragileABI_Class_Factory                 = 0x00001,
-
-  /// Is a meta-class.
-  FragileABI_Class_Meta                    = 0x00002,
-
-  /// Has a non-trivial constructor or destructor.
-  FragileABI_Class_HasCXXStructors         = 0x02000,
-
-  /// Has hidden visibility.
-  FragileABI_Class_Hidden                  = 0x20000,
-
-  /// Class implementation was compiled under ARC.
-  FragileABI_Class_CompiledByARC           = 0x04000000,
-
-  /// Class implementation was compiled under MRC and has MRC weak ivars.
-  /// Exclusive with CompiledByARC.
-  FragileABI_Class_HasMRCWeakIvars         = 0x08000000,
-};
-
-enum NonFragileClassFlags {
-  /// Is a meta-class.
-  NonFragileABI_Class_Meta                 = 0x00001,
-
-  /// Is a root class.
-  NonFragileABI_Class_Root                 = 0x00002,
-
-  /// Has a non-trivial constructor or destructor.
-  NonFragileABI_Class_HasCXXStructors      = 0x00004,
-
-  /// Has hidden visibility.
-  NonFragileABI_Class_Hidden               = 0x00010,
-
-  /// Has the exception attribute.
-  NonFragileABI_Class_Exception            = 0x00020,
-
-  /// (Obsolete) ARC-specific: this class has a .release_ivars method
-  NonFragileABI_Class_HasIvarReleaser      = 0x00040,
-
-  /// Class implementation was compiled under ARC.
-  NonFragileABI_Class_CompiledByARC        = 0x00080,
-
-  /// Class has non-trivial destructors, but zero-initialization is okay.
-  NonFragileABI_Class_HasCXXDestructorOnly = 0x00100,
-
-  /// Class implementation was compiled under MRC and has MRC weak ivars.
-  /// Exclusive with CompiledByARC.
-  NonFragileABI_Class_HasMRCWeakIvars      = 0x00200,
-};
-
-static bool hasWeakMember(QualType type) {
-  if (type.getObjCLifetime() == Qualifiers::OCL_Weak) {
-    return true;
-  }
-
-  if (auto recType = type->getAs<RecordType>()) {
-    for (auto field : recType->getDecl()->fields()) {
-      if (hasWeakMember(field->getType()))
-        return true;
-    }
-  }
-
-  return false;
-}
-
-/// For compatibility, we only want to set the "HasMRCWeakIvars" flag
-/// (and actually fill in a layout string) if we really do have any
-/// __weak ivars.
-static bool hasMRCWeakIvars(CodeGenModule &CGM,
-                            const ObjCImplementationDecl *ID) {
-  if (!CGM.getLangOpts().ObjCWeak) return false;
-  assert(CGM.getLangOpts().getGC() == LangOptions::NonGC);
-
-  for (const ObjCIvarDecl *ivar =
-         ID->getClassInterface()->all_declared_ivar_begin();
-       ivar; ivar = ivar->getNextIvar()) {
-    if (hasWeakMember(ivar->getType()))
-      return true;
-  }
-
-  return false;
-}
-
-/*
-  struct _objc_class {
-  Class isa;
-  Class super_class;
-  const char *name;
-  long version;
-  long info;
-  long instance_size;
-  struct _objc_ivar_list *ivars;
-  struct _objc_method_list *methods;
-  struct _objc_cache *cache;
-  struct _objc_protocol_list *protocols;
-  // Objective-C 1.0 extensions (<rdr://4585769>)
-  const char *ivar_layout;
-  struct _objc_class_ext *ext;
-  };
-
-  See EmitClassExtension();
-*/
-void CGObjCMac::GenerateClass(const ObjCImplementationDecl *ID) {
-  IdentifierInfo *RuntimeName =
-      &CGM.getContext().Idents.get(ID->getObjCRuntimeNameAsString());
-  DefinedSymbols.insert(RuntimeName);
-
-  std::string ClassName = ID->getNameAsString();
-  // FIXME: Gross
-  ObjCInterfaceDecl *Interface =
-    const_cast<ObjCInterfaceDecl*>(ID->getClassInterface());
-  llvm::Constant *Protocols =
-      EmitProtocolList("OBJC_CLASS_PROTOCOLS_" + ID->getName(),
-                       Interface->all_referenced_protocol_begin(),
-                       Interface->all_referenced_protocol_end());
-  unsigned Flags = FragileABI_Class_Factory;
-  if (ID->hasNonZeroConstructors() || ID->hasDestructors())
-    Flags |= FragileABI_Class_HasCXXStructors;
-
-  bool hasMRCWeak = false;
-
-  if (CGM.getLangOpts().ObjCAutoRefCount)
-    Flags |= FragileABI_Class_CompiledByARC;
-  else if ((hasMRCWeak = hasMRCWeakIvars(CGM, ID)))
-    Flags |= FragileABI_Class_HasMRCWeakIvars;
-
-  CharUnits Size =
-    CGM.getContext().getASTObjCImplementationLayout(ID).getSize();
-
-  // FIXME: Set CXX-structors flag.
-  if (ID->getClassInterface()->getVisibility() == HiddenVisibility)
-    Flags |= FragileABI_Class_Hidden;
-
-  enum {
-    InstanceMethods,
-    ClassMethods,
-    NumMethodLists
-  };
-  SmallVector<const ObjCMethodDecl *, 16> Methods[NumMethodLists];
-  for (const auto *MD : ID->methods()) {
-    Methods[unsigned(MD->isClassMethod())].push_back(MD);
-  }
-
-  for (const auto *PID : ID->property_impls()) {
-    if (PID->getPropertyImplementation() == ObjCPropertyImplDecl::Synthesize) {
-      ObjCPropertyDecl *PD = PID->getPropertyDecl();
-
-      if (ObjCMethodDecl *MD = PD->getGetterMethodDecl())
-        if (GetMethodDefinition(MD))
-          Methods[InstanceMethods].push_back(MD);
-      if (ObjCMethodDecl *MD = PD->getSetterMethodDecl())
-        if (GetMethodDefinition(MD))
-          Methods[InstanceMethods].push_back(MD);
-    }
-  }
-
-  ConstantInitBuilder builder(CGM);
-  auto values = builder.beginStruct(ObjCTypes.ClassTy);
-  values.add(EmitMetaClass(ID, Protocols, Methods[ClassMethods]));
-  if (ObjCInterfaceDecl *Super = Interface->getSuperClass()) {
-    // Record a reference to the super class.
-    LazySymbols.insert(Super->getIdentifier());
-
-    values.addBitCast(GetClassName(Super->getObjCRuntimeNameAsString()),
-                      ObjCTypes.ClassPtrTy);
-  } else {
-    values.addNullPointer(ObjCTypes.ClassPtrTy);
-  }
-  values.add(GetClassName(ID->getObjCRuntimeNameAsString()));
-  // Version is always 0.
-  values.addInt(ObjCTypes.LongTy, 0);
-  values.addInt(ObjCTypes.LongTy, Flags);
-  values.addInt(ObjCTypes.LongTy, Size.getQuantity());
-  values.add(EmitIvarList(ID, false));
-  values.add(emitMethodList(ID->getName(), MethodListType::InstanceMethods,
-                            Methods[InstanceMethods]));
-  // cache is always NULL.
-  values.addNullPointer(ObjCTypes.CachePtrTy);
-  values.add(Protocols);
-  values.add(BuildStrongIvarLayout(ID, CharUnits::Zero(), Size));
-  values.add(EmitClassExtension(ID, Size, hasMRCWeak,
-                                /*isMetaclass*/ false));
-
-  std::string Name("OBJC_CLASS_");
-  Name += ClassName;
-  const char *Section = "__OBJC,__class,regular,no_dead_strip";
-  // Check for a forward reference.
-  llvm::GlobalVariable *GV = CGM.getModule().getGlobalVariable(Name, true);
-  if (GV) {
-    assert(GV->getType()->getElementType() == ObjCTypes.ClassTy &&
-           "Forward metaclass reference has incorrect type.");
-    values.finishAndSetAsInitializer(GV);
-    GV->setSection(Section);
-    GV->setAlignment(CGM.getPointerAlign().getQuantity());
-    CGM.addCompilerUsedGlobal(GV);
-  } else
-    GV = CreateMetadataVar(Name, values, Section, CGM.getPointerAlign(), true);
-  DefinedClasses.push_back(GV);
-  ImplementedClasses.push_back(Interface);
-  // method definition entries must be clear for next implementation.
-  MethodDefinitions.clear();
-}
-
-llvm::Constant *CGObjCMac::EmitMetaClass(const ObjCImplementationDecl *ID,
-                                         llvm::Constant *Protocols,
-                                ArrayRef<const ObjCMethodDecl*> Methods) {
-  unsigned Flags = FragileABI_Class_Meta;
-  unsigned Size = CGM.getDataLayout().getTypeAllocSize(ObjCTypes.ClassTy);
-
-  if (ID->getClassInterface()->getVisibility() == HiddenVisibility)
-    Flags |= FragileABI_Class_Hidden;
-
-  ConstantInitBuilder builder(CGM);
-  auto values = builder.beginStruct(ObjCTypes.ClassTy);
-  // The isa for the metaclass is the root of the hierarchy.
-  const ObjCInterfaceDecl *Root = ID->getClassInterface();
-  while (const ObjCInterfaceDecl *Super = Root->getSuperClass())
-    Root = Super;
-  values.addBitCast(GetClassName(Root->getObjCRuntimeNameAsString()),
-                    ObjCTypes.ClassPtrTy);
-  // The super class for the metaclass is emitted as the name of the
-  // super class. The runtime fixes this up to point to the
-  // *metaclass* for the super class.
-  if (ObjCInterfaceDecl *Super = ID->getClassInterface()->getSuperClass()) {
-    values.addBitCast(GetClassName(Super->getObjCRuntimeNameAsString()),
-                      ObjCTypes.ClassPtrTy);
-  } else {
-    values.addNullPointer(ObjCTypes.ClassPtrTy);
-  }
-  values.add(GetClassName(ID->getObjCRuntimeNameAsString()));
-  // Version is always 0.
-  values.addInt(ObjCTypes.LongTy, 0);
-  values.addInt(ObjCTypes.LongTy, Flags);
-  values.addInt(ObjCTypes.LongTy, Size);
-  values.add(EmitIvarList(ID, true));
-  values.add(emitMethodList(ID->getName(), MethodListType::ClassMethods,
-                            Methods));
-  // cache is always NULL.
-  values.addNullPointer(ObjCTypes.CachePtrTy);
-  values.add(Protocols);
-  // ivar_layout for metaclass is always NULL.
-  values.addNullPointer(ObjCTypes.Int8PtrTy);
-  // The class extension is used to store class properties for metaclasses.
-  values.add(EmitClassExtension(ID, CharUnits::Zero(), false/*hasMRCWeak*/,
-                                /*isMetaclass*/true));
-
-  std::string Name("OBJC_METACLASS_");
-  Name += ID->getName();
-
-  // Check for a forward reference.
-  llvm::GlobalVariable *GV = CGM.getModule().getGlobalVariable(Name, true);
-  if (GV) {
-    assert(GV->getType()->getElementType() == ObjCTypes.ClassTy &&
-           "Forward metaclass reference has incorrect type.");
-    values.finishAndSetAsInitializer(GV);
-  } else {
-    GV = values.finishAndCreateGlobal(Name, CGM.getPointerAlign(),
-                                      /*constant*/ false,
-                                      llvm::GlobalValue::PrivateLinkage);
-  }
-  GV->setSection("__OBJC,__meta_class,regular,no_dead_strip");
-  CGM.addCompilerUsedGlobal(GV);
-
-  return GV;
-}
-
-llvm::Constant *CGObjCMac::EmitMetaClassRef(const ObjCInterfaceDecl *ID) {
-  std::string Name = "OBJC_METACLASS_" + ID->getNameAsString();
-
-  // FIXME: Should we look these up somewhere other than the module. Its a bit
-  // silly since we only generate these while processing an implementation, so
-  // exactly one pointer would work if know when we entered/exitted an
-  // implementation block.
-
-  // Check for an existing forward reference.
-  // Previously, metaclass with internal linkage may have been defined.
-  // pass 'true' as 2nd argument so it is returned.
-  llvm::GlobalVariable *GV = CGM.getModule().getGlobalVariable(Name, true);
-  if (!GV)
-    GV = new llvm::GlobalVariable(CGM.getModule(), ObjCTypes.ClassTy, false,
-                                  llvm::GlobalValue::PrivateLinkage, nullptr,
-                                  Name);
-
-  assert(GV->getType()->getElementType() == ObjCTypes.ClassTy &&
-         "Forward metaclass reference has incorrect type.");
-  return GV;
-}
-
-llvm::Value *CGObjCMac::EmitSuperClassRef(const ObjCInterfaceDecl *ID) {
-  std::string Name = "OBJC_CLASS_" + ID->getNameAsString();
-  llvm::GlobalVariable *GV = CGM.getModule().getGlobalVariable(Name, true);
-
-  if (!GV)
-    GV = new llvm::GlobalVariable(CGM.getModule(), ObjCTypes.ClassTy, false,
-                                  llvm::GlobalValue::PrivateLinkage, nullptr,
-                                  Name);
-
-  assert(GV->getType()->getElementType() == ObjCTypes.ClassTy &&
-         "Forward class metadata reference has incorrect type.");
-  return GV;
-}
-
-/*
-  Emit a "class extension", which in this specific context means extra
-  data that doesn't fit in the normal fragile-ABI class structure, and
-  has nothing to do with the language concept of a class extension.
-
-  struct objc_class_ext {
-  uint32_t size;
-  const char *weak_ivar_layout;
-  struct _objc_property_list *properties;
-  };
-*/
-llvm::Constant *
-CGObjCMac::EmitClassExtension(const ObjCImplementationDecl *ID,
-                              CharUnits InstanceSize, bool hasMRCWeakIvars,
-                              bool isMetaclass) {
-  // Weak ivar layout.
-  llvm::Constant *layout;
-  if (isMetaclass) {
-    layout = llvm::ConstantPointerNull::get(CGM.Int8PtrTy);
-  } else {
-    layout = BuildWeakIvarLayout(ID, CharUnits::Zero(), InstanceSize,
-                                 hasMRCWeakIvars);
-  }
-
-  // Properties.
-  llvm::Constant *propertyList =
-    EmitPropertyList((isMetaclass ? Twine("\01l_OBJC_$_CLASS_PROP_LIST_")
-                                  : Twine("\01l_OBJC_$_PROP_LIST_"))
-                        + ID->getName(),
-                     ID, ID->getClassInterface(), ObjCTypes, isMetaclass);
-
-  // Return null if no extension bits are used.
-  if (layout->isNullValue() && propertyList->isNullValue()) {
-    return llvm::Constant::getNullValue(ObjCTypes.ClassExtensionPtrTy);
-  }
-
-  uint64_t size =
-    CGM.getDataLayout().getTypeAllocSize(ObjCTypes.ClassExtensionTy);
-
-  ConstantInitBuilder builder(CGM);
-  auto values = builder.beginStruct(ObjCTypes.ClassExtensionTy);
-  values.addInt(ObjCTypes.IntTy, size);
-  values.add(layout);
-  values.add(propertyList);
-
-  return CreateMetadataVar("OBJC_CLASSEXT_" + ID->getName(), values,
-                           "__OBJC,__class_ext,regular,no_dead_strip",
-                           CGM.getPointerAlign(), true);
-}
-
-/*
-  struct objc_ivar {
-    char *ivar_name;
-    char *ivar_type;
-    int ivar_offset;
-  };
-
-  struct objc_ivar_list {
-    int ivar_count;
-    struct objc_ivar list[count];
-  };
-*/
-llvm::Constant *CGObjCMac::EmitIvarList(const ObjCImplementationDecl *ID,
-                                        bool ForClass) {
-  // When emitting the root class GCC emits ivar entries for the
-  // actual class structure. It is not clear if we need to follow this
-  // behavior; for now lets try and get away with not doing it. If so,
-  // the cleanest solution would be to make up an ObjCInterfaceDecl
-  // for the class.
-  if (ForClass)
-    return llvm::Constant::getNullValue(ObjCTypes.IvarListPtrTy);
-
-  const ObjCInterfaceDecl *OID = ID->getClassInterface();
-
-  ConstantInitBuilder builder(CGM);
-  auto ivarList = builder.beginStruct();
-  auto countSlot = ivarList.addPlaceholder();
-  auto ivars = ivarList.beginArray(ObjCTypes.IvarTy);
-
-  for (const ObjCIvarDecl *IVD = OID->all_declared_ivar_begin();
-       IVD; IVD = IVD->getNextIvar()) {
-    // Ignore unnamed bit-fields.
-    if (!IVD->getDeclName())
-      continue;
-
-    auto ivar = ivars.beginStruct(ObjCTypes.IvarTy);
-    ivar.add(GetMethodVarName(IVD->getIdentifier()));
-    ivar.add(GetMethodVarType(IVD));
-    ivar.addInt(ObjCTypes.IntTy, ComputeIvarBaseOffset(CGM, OID, IVD));
-    ivar.finishAndAddTo(ivars);
-  }
-
-  // Return null for empty list.
-  auto count = ivars.size();
-  if (count == 0) {
-    ivars.abandon();
-    ivarList.abandon();
-    return llvm::Constant::getNullValue(ObjCTypes.IvarListPtrTy);
-  }
-
-  ivars.finishAndAddTo(ivarList);
-  ivarList.fillPlaceholderWithInt(countSlot, ObjCTypes.IntTy, count);
-
-  llvm::GlobalVariable *GV;
-  if (ForClass)
-    GV =
-        CreateMetadataVar("OBJC_CLASS_VARIABLES_" + ID->getName(), ivarList,
-                          "__OBJC,__class_vars,regular,no_dead_strip",
-                          CGM.getPointerAlign(), true);
-  else
-    GV = CreateMetadataVar("OBJC_INSTANCE_VARIABLES_" + ID->getName(), ivarList,
-                           "__OBJC,__instance_vars,regular,no_dead_strip",
-                           CGM.getPointerAlign(), true);
-  return llvm::ConstantExpr::getBitCast(GV, ObjCTypes.IvarListPtrTy);
-}
-
-/// Build a struct objc_method_description constant for the given method.
-///
-/// struct objc_method_description {
-///   SEL method_name;
-///   char *method_types;
-/// };
-void CGObjCMac::emitMethodDescriptionConstant(ConstantArrayBuilder &builder,
-                                              const ObjCMethodDecl *MD) {
-  auto description = builder.beginStruct(ObjCTypes.MethodDescriptionTy);
-  description.addBitCast(GetMethodVarName(MD->getSelector()),
-                         ObjCTypes.SelectorPtrTy);
-  description.add(GetMethodVarType(MD));
-  description.finishAndAddTo(builder);
-}
-
-/// Build a struct objc_method constant for the given method.
-///
-/// struct objc_method {
-///   SEL method_name;
-///   char *method_types;
-///   void *method;
-/// };
-void CGObjCMac::emitMethodConstant(ConstantArrayBuilder &builder,
-                                   const ObjCMethodDecl *MD) {
-  llvm::Function *fn = GetMethodDefinition(MD);
-  assert(fn && "no definition registered for method");
-
-  auto method = builder.beginStruct(ObjCTypes.MethodTy);
-  method.addBitCast(GetMethodVarName(MD->getSelector()),
-                    ObjCTypes.SelectorPtrTy);
-  method.add(GetMethodVarType(MD));
-  method.addBitCast(fn, ObjCTypes.Int8PtrTy);
-  method.finishAndAddTo(builder);
-}
-
-/// Build a struct objc_method_list or struct objc_method_description_list,
-/// as appropriate.
-///
-/// struct objc_method_list {
-///   struct objc_method_list *obsolete;
-///   int count;
-///   struct objc_method methods_list[count];
-/// };
-///
-/// struct objc_method_description_list {
-///   int count;
-///   struct objc_method_description list[count];
-/// };
-llvm::Constant *CGObjCMac::emitMethodList(Twine name, MethodListType MLT,
-                                 ArrayRef<const ObjCMethodDecl *> methods) {
-  StringRef prefix;
-  StringRef section;
-  bool forProtocol = false;
-  switch (MLT) {
-  case MethodListType::CategoryInstanceMethods:
-    prefix = "OBJC_CATEGORY_INSTANCE_METHODS_";
-    section = "__OBJC,__cat_inst_meth,regular,no_dead_strip";
-    forProtocol = false;
-    break;
-  case MethodListType::CategoryClassMethods:
-    prefix = "OBJC_CATEGORY_CLASS_METHODS_";
-    section = "__OBJC,__cat_cls_meth,regular,no_dead_strip";
-    forProtocol = false;
-    break;
-  case MethodListType::InstanceMethods:
-    prefix = "OBJC_INSTANCE_METHODS_";
-    section = "__OBJC,__inst_meth,regular,no_dead_strip";
-    forProtocol = false;
-    break;
-  case MethodListType::ClassMethods:
-    prefix = "OBJC_CLASS_METHODS_";
-    section = "__OBJC,__cls_meth,regular,no_dead_strip";
-    forProtocol = false;
-    break;
-  case MethodListType::ProtocolInstanceMethods:
-    prefix = "OBJC_PROTOCOL_INSTANCE_METHODS_";
-    section = "__OBJC,__cat_inst_meth,regular,no_dead_strip";
-    forProtocol = true;
-    break;
-  case MethodListType::ProtocolClassMethods:
-    prefix = "OBJC_PROTOCOL_CLASS_METHODS_";
-    section = "__OBJC,__cat_cls_meth,regular,no_dead_strip";
-    forProtocol = true;
-    break;
-  case MethodListType::OptionalProtocolInstanceMethods:
-    prefix = "OBJC_PROTOCOL_INSTANCE_METHODS_OPT_";
-    section = "__OBJC,__cat_inst_meth,regular,no_dead_strip";
-    forProtocol = true;
-    break;
-  case MethodListType::OptionalProtocolClassMethods:
-    prefix = "OBJC_PROTOCOL_CLASS_METHODS_OPT_";
-    section = "__OBJC,__cat_cls_meth,regular,no_dead_strip";
-    forProtocol = true;
-    break;
-  }
-
-  // Return null for empty list.
-  if (methods.empty())
-    return llvm::Constant::getNullValue(forProtocol
-                                        ? ObjCTypes.MethodDescriptionListPtrTy
-                                        : ObjCTypes.MethodListPtrTy);
-
-  // For protocols, this is an objc_method_description_list, which has
-  // a slightly different structure.
-  if (forProtocol) {
-    ConstantInitBuilder builder(CGM);
-    auto values = builder.beginStruct();
-    values.addInt(ObjCTypes.IntTy, methods.size());
-    auto methodArray = values.beginArray(ObjCTypes.MethodDescriptionTy);
-    for (auto MD : methods) {
-      emitMethodDescriptionConstant(methodArray, MD);
-    }
-    methodArray.finishAndAddTo(values);
-
-    llvm::GlobalVariable *GV = CreateMetadataVar(prefix + name, values, section,
-                                                 CGM.getPointerAlign(), true);
-    return llvm::ConstantExpr::getBitCast(GV,
-                                          ObjCTypes.MethodDescriptionListPtrTy);
-  }
-
-  // Otherwise, it's an objc_method_list.
-  ConstantInitBuilder builder(CGM);
-  auto values = builder.beginStruct();
-  values.addNullPointer(ObjCTypes.Int8PtrTy);
-  values.addInt(ObjCTypes.IntTy, methods.size());
-  auto methodArray = values.beginArray(ObjCTypes.MethodTy);
-  for (auto MD : methods) {
-    emitMethodConstant(methodArray, MD);
-  }
-  methodArray.finishAndAddTo(values);
-
-  llvm::GlobalVariable *GV = CreateMetadataVar(prefix + name, values, section,
-                                               CGM.getPointerAlign(), true);
-  return llvm::ConstantExpr::getBitCast(GV, ObjCTypes.MethodListPtrTy);
-}
-
-llvm::Function *CGObjCCommonMac::GenerateMethod(const ObjCMethodDecl *OMD,
-                                                const ObjCContainerDecl *CD) {
-  SmallString<256> Name;
-  GetNameForMethod(OMD, CD, Name);
-
-  CodeGenTypes &Types = CGM.getTypes();
-  llvm::FunctionType *MethodTy =
-    Types.GetFunctionType(Types.arrangeObjCMethodDeclaration(OMD));
-  llvm::Function *Method =
-    llvm::Function::Create(MethodTy,
-                           llvm::GlobalValue::InternalLinkage,
-                           Name.str(),
-                           &CGM.getModule());
-  MethodDefinitions.insert(std::make_pair(OMD, Method));
-
-  return Method;
-}
-
-llvm::GlobalVariable *CGObjCCommonMac::CreateMetadataVar(Twine Name,
-                                               ConstantStructBuilder &Init,
-                                                         StringRef Section,
-                                                         CharUnits Align,
-                                                         bool AddToUsed) {
-  llvm::GlobalVariable *GV =
-    Init.finishAndCreateGlobal(Name, Align, /*constant*/ false,
-                               llvm::GlobalValue::PrivateLinkage);
-  if (!Section.empty())
-    GV->setSection(Section);
-  if (AddToUsed)
-    CGM.addCompilerUsedGlobal(GV);
-  return GV;
-}
-
-llvm::GlobalVariable *CGObjCCommonMac::CreateMetadataVar(Twine Name,
-                                                         llvm::Constant *Init,
-                                                         StringRef Section,
-                                                         CharUnits Align,
-                                                         bool AddToUsed) {
-  llvm::Type *Ty = Init->getType();
-  llvm::GlobalVariable *GV =
-    new llvm::GlobalVariable(CGM.getModule(), Ty, false,
-                             llvm::GlobalValue::PrivateLinkage, Init, Name);
-  if (!Section.empty())
-    GV->setSection(Section);
-  GV->setAlignment(Align.getQuantity());
-  if (AddToUsed)
-    CGM.addCompilerUsedGlobal(GV);
-  return GV;
-}
-
-llvm::GlobalVariable *
-CGObjCCommonMac::CreateCStringLiteral(StringRef Name, ObjCLabelType Type,
-                                      bool ForceNonFragileABI,
-                                      bool NullTerminate) {
-  StringRef Label;
-  switch (Type) {
-  case ObjCLabelType::ClassName:     Label = "OBJC_CLASS_NAME_"; break;
-  case ObjCLabelType::MethodVarName: Label = "OBJC_METH_VAR_NAME_"; break;
-  case ObjCLabelType::MethodVarType: Label = "OBJC_METH_VAR_TYPE_"; break;
-  case ObjCLabelType::PropertyName:  Label = "OBJC_PROP_NAME_ATTR_"; break;
-  }
-
-  bool NonFragile = ForceNonFragileABI || isNonFragileABI();
-
-  StringRef Section;
-  switch (Type) {
-  case ObjCLabelType::ClassName:
-    Section = NonFragile ? "__TEXT,__objc_classname,cstring_literals"
-                         : "__TEXT,__cstring,cstring_literals";
-    break;
-  case ObjCLabelType::MethodVarName:
-    Section = NonFragile ? "__TEXT,__objc_methname,cstring_literals"
-                         : "__TEXT,__cstring,cstring_literals";
-    break;
-  case ObjCLabelType::MethodVarType:
-    Section = NonFragile ? "__TEXT,__objc_methtype,cstring_literals"
-                         : "__TEXT,__cstring,cstring_literals";
-    break;
-  case ObjCLabelType::PropertyName:
-    Section = "__TEXT,__cstring,cstring_literals";
-    break;
-  }
-
-  llvm::Constant *Value =
-      llvm::ConstantDataArray::getString(VMContext, Name, NullTerminate);
-  llvm::GlobalVariable *GV =
-      new llvm::GlobalVariable(CGM.getModule(), Value->getType(),
-                               /*isConstant=*/true,
-                               llvm::GlobalValue::PrivateLinkage, Value, Label);
-  if (CGM.getTriple().isOSBinFormatMachO())
-    GV->setSection(Section);
-  GV->setUnnamedAddr(llvm::GlobalValue::UnnamedAddr::Global);
-  GV->setAlignment(CharUnits::One().getQuantity());
-  CGM.addCompilerUsedGlobal(GV);
-
-  return GV;
-}
-
-llvm::Function *CGObjCMac::ModuleInitFunction() {
-  // Abuse this interface function as a place to finalize.
-  FinishModule();
-  return nullptr;
-}
-
-llvm::Constant *CGObjCMac::GetPropertyGetFunction() {
-  return ObjCTypes.getGetPropertyFn();
-}
-
-llvm::Constant *CGObjCMac::GetPropertySetFunction() {
-  return ObjCTypes.getSetPropertyFn();
-}
-
-llvm::Constant *CGObjCMac::GetOptimizedPropertySetFunction(bool atomic,
-                                                           bool copy) {
-  return ObjCTypes.getOptimizedSetPropertyFn(atomic, copy);
-}
-
-llvm::Constant *CGObjCMac::GetGetStructFunction() {
-  return ObjCTypes.getCopyStructFn();
-}
-
-llvm::Constant *CGObjCMac::GetSetStructFunction() {
-  return ObjCTypes.getCopyStructFn();
-}
-
-llvm::Constant *CGObjCMac::GetCppAtomicObjectGetFunction() {
-  return ObjCTypes.getCppAtomicObjectFunction();
-}
-
-llvm::Constant *CGObjCMac::GetCppAtomicObjectSetFunction() {
-  return ObjCTypes.getCppAtomicObjectFunction();
-}
-
-llvm::Constant *CGObjCMac::EnumerationMutationFunction() {
-  return ObjCTypes.getEnumerationMutationFn();
-}
-
-void CGObjCMac::EmitTryStmt(CodeGenFunction &CGF, const ObjCAtTryStmt &S) {
-  return EmitTryOrSynchronizedStmt(CGF, S);
-}
-
-void CGObjCMac::EmitSynchronizedStmt(CodeGenFunction &CGF,
-                                     const ObjCAtSynchronizedStmt &S) {
-  return EmitTryOrSynchronizedStmt(CGF, S);
-}
-
-namespace {
-  struct PerformFragileFinally final : EHScopeStack::Cleanup {
-    const Stmt &S;
-    Address SyncArgSlot;
-    Address CallTryExitVar;
-    Address ExceptionData;
-    ObjCTypesHelper &ObjCTypes;
-    PerformFragileFinally(const Stmt *S,
-                          Address SyncArgSlot,
-                          Address CallTryExitVar,
-                          Address ExceptionData,
-                          ObjCTypesHelper *ObjCTypes)
-      : S(*S), SyncArgSlot(SyncArgSlot), CallTryExitVar(CallTryExitVar),
-        ExceptionData(ExceptionData), ObjCTypes(*ObjCTypes) {}
-
-    void Emit(CodeGenFunction &CGF, Flags flags) override {
-      // Check whether we need to call objc_exception_try_exit.
-      // In optimized code, this branch will always be folded.
-      llvm::BasicBlock *FinallyCallExit =
-        CGF.createBasicBlock("finally.call_exit");
-      llvm::BasicBlock *FinallyNoCallExit =
-        CGF.createBasicBlock("finally.no_call_exit");
-      CGF.Builder.CreateCondBr(CGF.Builder.CreateLoad(CallTryExitVar),
-                               FinallyCallExit, FinallyNoCallExit);
-
-      CGF.EmitBlock(FinallyCallExit);
-      CGF.EmitNounwindRuntimeCall(ObjCTypes.getExceptionTryExitFn(),
-                                  ExceptionData.getPointer());
-
-      CGF.EmitBlock(FinallyNoCallExit);
-
-      if (isa<ObjCAtTryStmt>(S)) {
-        if (const ObjCAtFinallyStmt* FinallyStmt =
-              cast<ObjCAtTryStmt>(S).getFinallyStmt()) {
-          // Don't try to do the @finally if this is an EH cleanup.
-          if (flags.isForEHCleanup()) return;
-
-          // Save the current cleanup destination in case there's
-          // control flow inside the finally statement.
-          llvm::Value *CurCleanupDest =
-            CGF.Builder.CreateLoad(CGF.getNormalCleanupDestSlot());
-
-          CGF.EmitStmt(FinallyStmt->getFinallyBody());
-
-          if (CGF.HaveInsertPoint()) {
-            CGF.Builder.CreateStore(CurCleanupDest,
-                                    CGF.getNormalCleanupDestSlot());
-          } else {
-            // Currently, the end of the cleanup must always exist.
-            CGF.EnsureInsertPoint();
-          }
-        }
-      } else {
-        // Emit objc_sync_exit(expr); as finally's sole statement for
-        // @synchronized.
-        llvm::Value *SyncArg = CGF.Builder.CreateLoad(SyncArgSlot);
-        CGF.EmitNounwindRuntimeCall(ObjCTypes.getSyncExitFn(), SyncArg);
-      }
-    }
-  };
-
-  class FragileHazards {
-    CodeGenFunction &CGF;
-    SmallVector<llvm::Value*, 20> Locals;
-    llvm::DenseSet<llvm::BasicBlock*> BlocksBeforeTry;
-
-    llvm::InlineAsm *ReadHazard;
-    llvm::InlineAsm *WriteHazard;
-
-    llvm::FunctionType *GetAsmFnType();
-
-    void collectLocals();
-    void emitReadHazard(CGBuilderTy &Builder);
-
-  public:
-    FragileHazards(CodeGenFunction &CGF);
-
-    void emitWriteHazard();
-    void emitHazardsInNewBlocks();
-  };
-} // end anonymous namespace
-
-/// Create the fragile-ABI read and write hazards based on the current
-/// state of the function, which is presumed to be immediately prior
-/// to a @try block.  These hazards are used to maintain correct
-/// semantics in the face of optimization and the fragile ABI's
-/// cavalier use of setjmp/longjmp.
-FragileHazards::FragileHazards(CodeGenFunction &CGF) : CGF(CGF) {
-  collectLocals();
-
-  if (Locals.empty()) return;
-
-  // Collect all the blocks in the function.
-  for (llvm::Function::iterator
-         I = CGF.CurFn->begin(), E = CGF.CurFn->end(); I != E; ++I)
-    BlocksBeforeTry.insert(&*I);
-
-  llvm::FunctionType *AsmFnTy = GetAsmFnType();
-
-  // Create a read hazard for the allocas.  This inhibits dead-store
-  // optimizations and forces the values to memory.  This hazard is
-  // inserted before any 'throwing' calls in the protected scope to
-  // reflect the possibility that the variables might be read from the
-  // catch block if the call throws.
-  {
-    std::string Constraint;
-    for (unsigned I = 0, E = Locals.size(); I != E; ++I) {
-      if (I) Constraint += ',';
-      Constraint += "*m";
-    }
-
-    ReadHazard = llvm::InlineAsm::get(AsmFnTy, "", Constraint, true, false);
-  }
-
-  // Create a write hazard for the allocas.  This inhibits folding
-  // loads across the hazard.  This hazard is inserted at the
-  // beginning of the catch path to reflect the possibility that the
-  // variables might have been written within the protected scope.
-  {
-    std::string Constraint;
-    for (unsigned I = 0, E = Locals.size(); I != E; ++I) {
-      if (I) Constraint += ',';
-      Constraint += "=*m";
-    }
-
-    WriteHazard = llvm::InlineAsm::get(AsmFnTy, "", Constraint, true, false);
-  }
-}
-
-/// Emit a write hazard at the current location.
-void FragileHazards::emitWriteHazard() {
-  if (Locals.empty()) return;
-
-  CGF.EmitNounwindRuntimeCall(WriteHazard, Locals);
-}
-
-void FragileHazards::emitReadHazard(CGBuilderTy &Builder) {
-  assert(!Locals.empty());
-  llvm::CallInst *call = Builder.CreateCall(ReadHazard, Locals);
-  call->setDoesNotThrow();
-  call->setCallingConv(CGF.getRuntimeCC());
-}
-
-/// Emit read hazards in all the protected blocks, i.e. all the blocks
-/// which have been inserted since the beginning of the try.
-void FragileHazards::emitHazardsInNewBlocks() {
-  if (Locals.empty()) return;
-
-  CGBuilderTy Builder(CGF, CGF.getLLVMContext());
-
-  // Iterate through all blocks, skipping those prior to the try.
-  for (llvm::Function::iterator
-         FI = CGF.CurFn->begin(), FE = CGF.CurFn->end(); FI != FE; ++FI) {
-    llvm::BasicBlock &BB = *FI;
-    if (BlocksBeforeTry.count(&BB)) continue;
-
-    // Walk through all the calls in the block.
-    for (llvm::BasicBlock::iterator
-           BI = BB.begin(), BE = BB.end(); BI != BE; ++BI) {
-      llvm::Instruction &I = *BI;
-
-      // Ignore instructions that aren't non-intrinsic calls.
-      // These are the only calls that can possibly call longjmp.
-      if (!isa<llvm::CallInst>(I) && !isa<llvm::InvokeInst>(I)) continue;
-      if (isa<llvm::IntrinsicInst>(I))
-        continue;
-
-      // Ignore call sites marked nounwind.  This may be questionable,
-      // since 'nounwind' doesn't necessarily mean 'does not call longjmp'.
-      llvm::CallSite CS(&I);
-      if (CS.doesNotThrow()) continue;
-
-      // Insert a read hazard before the call.  This will ensure that
-      // any writes to the locals are performed before making the
-      // call.  If the call throws, then this is sufficient to
-      // guarantee correctness as long as it doesn't also write to any
-      // locals.
-      Builder.SetInsertPoint(&BB, BI);
-      emitReadHazard(Builder);
-    }
-  }
-}
-
-static void addIfPresent(llvm::DenseSet<llvm::Value*> &S, Address V) {
-  if (V.isValid()) S.insert(V.getPointer());
-}
-
-void FragileHazards::collectLocals() {
-  // Compute a set of allocas to ignore.
-  llvm::DenseSet<llvm::Value*> AllocasToIgnore;
-  addIfPresent(AllocasToIgnore, CGF.ReturnValue);
-  addIfPresent(AllocasToIgnore, CGF.NormalCleanupDest);
-
-  // Collect all the allocas currently in the function.  This is
-  // probably way too aggressive.
-  llvm::BasicBlock &Entry = CGF.CurFn->getEntryBlock();
-  for (llvm::BasicBlock::iterator
-         I = Entry.begin(), E = Entry.end(); I != E; ++I)
-    if (isa<llvm::AllocaInst>(*I) && !AllocasToIgnore.count(&*I))
-      Locals.push_back(&*I);
-}
-
-llvm::FunctionType *FragileHazards::GetAsmFnType() {
-  SmallVector<llvm::Type *, 16> tys(Locals.size());
-  for (unsigned i = 0, e = Locals.size(); i != e; ++i)
-    tys[i] = Locals[i]->getType();
-  return llvm::FunctionType::get(CGF.VoidTy, tys, false);
-}
-
-/*
-
-  Objective-C setjmp-longjmp (sjlj) Exception Handling
-  --
-
-  A catch buffer is a setjmp buffer plus:
-    - a pointer to the exception that was caught
-    - a pointer to the previous exception data buffer
-    - two pointers of reserved storage
-  Therefore catch buffers form a stack, with a pointer to the top
-  of the stack kept in thread-local storage.
-
-  objc_exception_try_enter pushes a catch buffer onto the EH stack.
-  objc_exception_try_exit pops the given catch buffer, which is
-    required to be the top of the EH stack.
-  objc_exception_throw pops the top of the EH stack, writes the
-    thrown exception into the appropriate field, and longjmps
-    to the setjmp buffer.  It crashes the process (with a printf
-    and an abort()) if there are no catch buffers on the stack.
-  objc_exception_extract just reads the exception pointer out of the
-    catch buffer.
-
-  There's no reason an implementation couldn't use a light-weight
-  setjmp here --- something like __builtin_setjmp, but API-compatible
-  with the heavyweight setjmp.  This will be more important if we ever
-  want to implement correct ObjC/C++ exception interactions for the
-  fragile ABI.
-
-  Note that for this use of setjmp/longjmp to be correct, we may need
-  to mark some local variables volatile: if a non-volatile local
-  variable is modified between the setjmp and the longjmp, it has
-  indeterminate value.  For the purposes of LLVM IR, it may be
-  sufficient to make loads and stores within the @try (to variables
-  declared outside the @try) volatile.  This is necessary for
-  optimized correctness, but is not currently being done; this is
-  being tracked as rdar://problem/8160285
-
-  The basic framework for a @try-catch-finally is as follows:
-  {
-  objc_exception_data d;
-  id _rethrow = null;
-  bool _call_try_exit = true;
-
-  objc_exception_try_enter(&d);
-  if (!setjmp(d.jmp_buf)) {
-  ... try body ...
-  } else {
-  // exception path
-  id _caught = objc_exception_extract(&d);
-
-  // enter new try scope for handlers
-  if (!setjmp(d.jmp_buf)) {
-  ... match exception and execute catch blocks ...
-
-  // fell off end, rethrow.
-  _rethrow = _caught;
-  ... jump-through-finally to finally_rethrow ...
-  } else {
-  // exception in catch block
-  _rethrow = objc_exception_extract(&d);
-  _call_try_exit = false;
-  ... jump-through-finally to finally_rethrow ...
-  }
-  }
-  ... jump-through-finally to finally_end ...
-
-  finally:
-  if (_call_try_exit)
-  objc_exception_try_exit(&d);
-
-  ... finally block ....
-  ... dispatch to finally destination ...
-
-  finally_rethrow:
-  objc_exception_throw(_rethrow);
-
-  finally_end:
-  }
-
-  This framework differs slightly from the one gcc uses, in that gcc
-  uses _rethrow to determine if objc_exception_try_exit should be called
-  and if the object should be rethrown. This breaks in the face of
-  throwing nil and introduces unnecessary branches.
-
-  We specialize this framework for a few particular circumstances:
-
-  - If there are no catch blocks, then we avoid emitting the second
-  exception handling context.
-
-  - If there is a catch-all catch block (i.e. @catch(...) or @catch(id
-  e)) we avoid emitting the code to rethrow an uncaught exception.
-
-  - FIXME: If there is no @finally block we can do a few more
-  simplifications.
-
-  Rethrows and Jumps-Through-Finally
-  --
-
-  '@throw;' is supported by pushing the currently-caught exception
-  onto ObjCEHStack while the @catch blocks are emitted.
-
-  Branches through the @finally block are handled with an ordinary
-  normal cleanup.  We do not register an EH cleanup; fragile-ABI ObjC
-  exceptions are not compatible with C++ exceptions, and this is
-  hardly the only place where this will go wrong.
-
-  @synchronized(expr) { stmt; } is emitted as if it were:
-    id synch_value = expr;
-    objc_sync_enter(synch_value);
-    @try { stmt; } @finally { objc_sync_exit(synch_value); }
-*/
-
-void CGObjCMac::EmitTryOrSynchronizedStmt(CodeGen::CodeGenFunction &CGF,
-                                          const Stmt &S) {
-  bool isTry = isa<ObjCAtTryStmt>(S);
-
-  // A destination for the fall-through edges of the catch handlers to
-  // jump to.
-  CodeGenFunction::JumpDest FinallyEnd =
-    CGF.getJumpDestInCurrentScope("finally.end");
-
-  // A destination for the rethrow edge of the catch handlers to jump
-  // to.
-  CodeGenFunction::JumpDest FinallyRethrow =
-    CGF.getJumpDestInCurrentScope("finally.rethrow");
-
-  // For @synchronized, call objc_sync_enter(sync.expr). The
-  // evaluation of the expression must occur before we enter the
-  // @synchronized.  We can't avoid a temp here because we need the
-  // value to be preserved.  If the backend ever does liveness
-  // correctly after setjmp, this will be unnecessary.
-  Address SyncArgSlot = Address::invalid();
-  if (!isTry) {
-    llvm::Value *SyncArg =
-      CGF.EmitScalarExpr(cast<ObjCAtSynchronizedStmt>(S).getSynchExpr());
-    SyncArg = CGF.Builder.CreateBitCast(SyncArg, ObjCTypes.ObjectPtrTy);
-    CGF.EmitNounwindRuntimeCall(ObjCTypes.getSyncEnterFn(), SyncArg);
-
-    SyncArgSlot = CGF.CreateTempAlloca(SyncArg->getType(),
-                                       CGF.getPointerAlign(), "sync.arg");
-    CGF.Builder.CreateStore(SyncArg, SyncArgSlot);
-  }
-
-  // Allocate memory for the setjmp buffer.  This needs to be kept
-  // live throughout the try and catch blocks.
-  Address ExceptionData = CGF.CreateTempAlloca(ObjCTypes.ExceptionDataTy,
-                                               CGF.getPointerAlign(),
-                                               "exceptiondata.ptr");
-
-  // Create the fragile hazards.  Note that this will not capture any
-  // of the allocas required for exception processing, but will
-  // capture the current basic block (which extends all the way to the
-  // setjmp call) as "before the @try".
-  FragileHazards Hazards(CGF);
-
-  // Create a flag indicating whether the cleanup needs to call
-  // objc_exception_try_exit.  This is true except when
-  //   - no catches match and we're branching through the cleanup
-  //     just to rethrow the exception, or
-  //   - a catch matched and we're falling out of the catch handler.
-  // The setjmp-safety rule here is that we should always store to this
-  // variable in a place that dominates the branch through the cleanup
-  // without passing through any setjmps.
-  Address CallTryExitVar = CGF.CreateTempAlloca(CGF.Builder.getInt1Ty(),
-                                                CharUnits::One(),
-                                                "_call_try_exit");
-
-  // A slot containing the exception to rethrow.  Only needed when we
-  // have both a @catch and a @finally.
-  Address PropagatingExnVar = Address::invalid();
-
-  // Push a normal cleanup to leave the try scope.
-  CGF.EHStack.pushCleanup<PerformFragileFinally>(NormalAndEHCleanup, &S,
-                                                 SyncArgSlot,
-                                                 CallTryExitVar,
-                                                 ExceptionData,
-                                                 &ObjCTypes);
-
-  // Enter a try block:
-  //  - Call objc_exception_try_enter to push ExceptionData on top of
-  //    the EH stack.
-  CGF.EmitNounwindRuntimeCall(ObjCTypes.getExceptionTryEnterFn(),
-                              ExceptionData.getPointer());
-
-  //  - Call setjmp on the exception data buffer.
-  llvm::Constant *Zero = llvm::ConstantInt::get(CGF.Builder.getInt32Ty(), 0);
-  llvm::Value *GEPIndexes[] = { Zero, Zero, Zero };
-  llvm::Value *SetJmpBuffer = CGF.Builder.CreateGEP(
-      ObjCTypes.ExceptionDataTy, ExceptionData.getPointer(), GEPIndexes,
-      "setjmp_buffer");
-  llvm::CallInst *SetJmpResult = CGF.EmitNounwindRuntimeCall(
-      ObjCTypes.getSetJmpFn(), SetJmpBuffer, "setjmp_result");
-  SetJmpResult->setCanReturnTwice();
-
-  // If setjmp returned 0, enter the protected block; otherwise,
-  // branch to the handler.
-  llvm::BasicBlock *TryBlock = CGF.createBasicBlock("try");
-  llvm::BasicBlock *TryHandler = CGF.createBasicBlock("try.handler");
-  llvm::Value *DidCatch =
-    CGF.Builder.CreateIsNotNull(SetJmpResult, "did_catch_exception");
-  CGF.Builder.CreateCondBr(DidCatch, TryHandler, TryBlock);
-
-  // Emit the protected block.
-  CGF.EmitBlock(TryBlock);
-  CGF.Builder.CreateStore(CGF.Builder.getTrue(), CallTryExitVar);
-  CGF.EmitStmt(isTry ? cast<ObjCAtTryStmt>(S).getTryBody()
-                     : cast<ObjCAtSynchronizedStmt>(S).getSynchBody());
-
-  CGBuilderTy::InsertPoint TryFallthroughIP = CGF.Builder.saveAndClearIP();
-
-  // Emit the exception handler block.
-  CGF.EmitBlock(TryHandler);
-
-  // Don't optimize loads of the in-scope locals across this point.
-  Hazards.emitWriteHazard();
-
-  // For a @synchronized (or a @try with no catches), just branch
-  // through the cleanup to the rethrow block.
-  if (!isTry || !cast<ObjCAtTryStmt>(S).getNumCatchStmts()) {
-    // Tell the cleanup not to re-pop the exit.
-    CGF.Builder.CreateStore(CGF.Builder.getFalse(), CallTryExitVar);
-    CGF.EmitBranchThroughCleanup(FinallyRethrow);
-
-  // Otherwise, we have to match against the caught exceptions.
-  } else {
-    // Retrieve the exception object.  We may emit multiple blocks but
-    // nothing can cross this so the value is already in SSA form.
-    llvm::CallInst *Caught =
-      CGF.EmitNounwindRuntimeCall(ObjCTypes.getExceptionExtractFn(),
-                                  ExceptionData.getPointer(), "caught");
-
-    // Push the exception to rethrow onto the EH value stack for the
-    // benefit of any @throws in the handlers.
-    CGF.ObjCEHValueStack.push_back(Caught);
-
-    const ObjCAtTryStmt* AtTryStmt = cast<ObjCAtTryStmt>(&S);
-
-    bool HasFinally = (AtTryStmt->getFinallyStmt() != nullptr);
-
-    llvm::BasicBlock *CatchBlock = nullptr;
-    llvm::BasicBlock *CatchHandler = nullptr;
-    if (HasFinally) {
-      // Save the currently-propagating exception before
-      // objc_exception_try_enter clears the exception slot.
-      PropagatingExnVar = CGF.CreateTempAlloca(Caught->getType(),
-                                               CGF.getPointerAlign(),
-                                               "propagating_exception");
-      CGF.Builder.CreateStore(Caught, PropagatingExnVar);
-
-      // Enter a new exception try block (in case a @catch block
-      // throws an exception).
-      CGF.EmitNounwindRuntimeCall(ObjCTypes.getExceptionTryEnterFn(),
-                                  ExceptionData.getPointer());
-
-      llvm::CallInst *SetJmpResult =
-        CGF.EmitNounwindRuntimeCall(ObjCTypes.getSetJmpFn(),
-                                    SetJmpBuffer, "setjmp.result");
-      SetJmpResult->setCanReturnTwice();
-
-      llvm::Value *Threw =
-        CGF.Builder.CreateIsNotNull(SetJmpResult, "did_catch_exception");
-
-      CatchBlock = CGF.createBasicBlock("catch");
-      CatchHandler = CGF.createBasicBlock("catch_for_catch");
-      CGF.Builder.CreateCondBr(Threw, CatchHandler, CatchBlock);
-
-      CGF.EmitBlock(CatchBlock);
-    }
-
-    CGF.Builder.CreateStore(CGF.Builder.getInt1(HasFinally), CallTryExitVar);
-
-    // Handle catch list. As a special case we check if everything is
-    // matched and avoid generating code for falling off the end if
-    // so.
-    bool AllMatched = false;
-    for (unsigned I = 0, N = AtTryStmt->getNumCatchStmts(); I != N; ++I) {
-      const ObjCAtCatchStmt *CatchStmt = AtTryStmt->getCatchStmt(I);
-
-      const VarDecl *CatchParam = CatchStmt->getCatchParamDecl();
-      const ObjCObjectPointerType *OPT = nullptr;
-
-      // catch(...) always matches.
-      if (!CatchParam) {
-        AllMatched = true;
-      } else {
-        OPT = CatchParam->getType()->getAs<ObjCObjectPointerType>();
-
-        // catch(id e) always matches under this ABI, since only
-        // ObjC exceptions end up here in the first place.
-        // FIXME: For the time being we also match id<X>; this should
-        // be rejected by Sema instead.
-        if (OPT && (OPT->isObjCIdType() || OPT->isObjCQualifiedIdType()))
-          AllMatched = true;
-      }
-
-      // If this is a catch-all, we don't need to test anything.
-      if (AllMatched) {
-        CodeGenFunction::RunCleanupsScope CatchVarCleanups(CGF);
-
-        if (CatchParam) {
-          CGF.EmitAutoVarDecl(*CatchParam);
-          assert(CGF.HaveInsertPoint() && "DeclStmt destroyed insert point?");
-
-          // These types work out because ConvertType(id) == i8*.
-          EmitInitOfCatchParam(CGF, Caught, CatchParam);
-        }
-
-        CGF.EmitStmt(CatchStmt->getCatchBody());
-
-        // The scope of the catch variable ends right here.
-        CatchVarCleanups.ForceCleanup();
-
-        CGF.EmitBranchThroughCleanup(FinallyEnd);
-        break;
-      }
-
-      assert(OPT && "Unexpected non-object pointer type in @catch");
-      const ObjCObjectType *ObjTy = OPT->getObjectType();
-
-      // FIXME: @catch (Class c) ?
-      ObjCInterfaceDecl *IDecl = ObjTy->getInterface();
-      assert(IDecl && "Catch parameter must have Objective-C type!");
-
-      // Check if the @catch block matches the exception object.
-      llvm::Value *Class = EmitClassRef(CGF, IDecl);
-
-      llvm::Value *matchArgs[] = { Class, Caught };
-      llvm::CallInst *Match =
-        CGF.EmitNounwindRuntimeCall(ObjCTypes.getExceptionMatchFn(),
-                                    matchArgs, "match");
-
-      llvm::BasicBlock *MatchedBlock = CGF.createBasicBlock("match");
-      llvm::BasicBlock *NextCatchBlock = CGF.createBasicBlock("catch.next");
-
-      CGF.Builder.CreateCondBr(CGF.Builder.CreateIsNotNull(Match, "matched"),
-                               MatchedBlock, NextCatchBlock);
-
-      // Emit the @catch block.
-      CGF.EmitBlock(MatchedBlock);
-
-      // Collect any cleanups for the catch variable.  The scope lasts until
-      // the end of the catch body.
-      CodeGenFunction::RunCleanupsScope CatchVarCleanups(CGF);
-
-      CGF.EmitAutoVarDecl(*CatchParam);
-      assert(CGF.HaveInsertPoint() && "DeclStmt destroyed insert point?");
-
-      // Initialize the catch variable.
-      llvm::Value *Tmp =
-        CGF.Builder.CreateBitCast(Caught,
-                                  CGF.ConvertType(CatchParam->getType()));
-      EmitInitOfCatchParam(CGF, Tmp, CatchParam);
-
-      CGF.EmitStmt(CatchStmt->getCatchBody());
-
-      // We're done with the catch variable.
-      CatchVarCleanups.ForceCleanup();
-
-      CGF.EmitBranchThroughCleanup(FinallyEnd);
-
-      CGF.EmitBlock(NextCatchBlock);
-    }
-
-    CGF.ObjCEHValueStack.pop_back();
-
-    // If nothing wanted anything to do with the caught exception,
-    // kill the extract call.
-    if (Caught->use_empty())
-      Caught->eraseFromParent();
-
-    if (!AllMatched)
-      CGF.EmitBranchThroughCleanup(FinallyRethrow);
-
-    if (HasFinally) {
-      // Emit the exception handler for the @catch blocks.
-      CGF.EmitBlock(CatchHandler);
-
-      // In theory we might now need a write hazard, but actually it's
-      // unnecessary because there's no local-accessing code between
-      // the try's write hazard and here.
-      //Hazards.emitWriteHazard();
-
-      // Extract the new exception and save it to the
-      // propagating-exception slot.
-      assert(PropagatingExnVar.isValid());
-      llvm::CallInst *NewCaught =
-        CGF.EmitNounwindRuntimeCall(ObjCTypes.getExceptionExtractFn(),
-                                    ExceptionData.getPointer(), "caught");
-      CGF.Builder.CreateStore(NewCaught, PropagatingExnVar);
-
-      // Don't pop the catch handler; the throw already did.
-      CGF.Builder.CreateStore(CGF.Builder.getFalse(), CallTryExitVar);
-      CGF.EmitBranchThroughCleanup(FinallyRethrow);
-    }
-  }
-
-  // Insert read hazards as required in the new blocks.
-  Hazards.emitHazardsInNewBlocks();
-
-  // Pop the cleanup.
-  CGF.Builder.restoreIP(TryFallthroughIP);
-  if (CGF.HaveInsertPoint())
-    CGF.Builder.CreateStore(CGF.Builder.getTrue(), CallTryExitVar);
-  CGF.PopCleanupBlock();
-  CGF.EmitBlock(FinallyEnd.getBlock(), true);
-
-  // Emit the rethrow block.
-  CGBuilderTy::InsertPoint SavedIP = CGF.Builder.saveAndClearIP();
-  CGF.EmitBlock(FinallyRethrow.getBlock(), true);
-  if (CGF.HaveInsertPoint()) {
-    // If we have a propagating-exception variable, check it.
-    llvm::Value *PropagatingExn;
-    if (PropagatingExnVar.isValid()) {
-      PropagatingExn = CGF.Builder.CreateLoad(PropagatingExnVar);
-
-    // Otherwise, just look in the buffer for the exception to throw.
-    } else {
-      llvm::CallInst *Caught =
-        CGF.EmitNounwindRuntimeCall(ObjCTypes.getExceptionExtractFn(),
-                                    ExceptionData.getPointer());
-      PropagatingExn = Caught;
-    }
-
-    CGF.EmitNounwindRuntimeCall(ObjCTypes.getExceptionThrowFn(),
-                                PropagatingExn);
-    CGF.Builder.CreateUnreachable();
-  }
-
-  CGF.Builder.restoreIP(SavedIP);
-}
-
-void CGObjCMac::EmitThrowStmt(CodeGen::CodeGenFunction &CGF,
-                              const ObjCAtThrowStmt &S,
-                              bool ClearInsertionPoint) {
-  llvm::Value *ExceptionAsObject;
-
-  if (const Expr *ThrowExpr = S.getThrowExpr()) {
-    llvm::Value *Exception = CGF.EmitObjCThrowOperand(ThrowExpr);
-    ExceptionAsObject =
-      CGF.Builder.CreateBitCast(Exception, ObjCTypes.ObjectPtrTy);
-  } else {
-    assert((!CGF.ObjCEHValueStack.empty() && CGF.ObjCEHValueStack.back()) &&
-           "Unexpected rethrow outside @catch block.");
-    ExceptionAsObject = CGF.ObjCEHValueStack.back();
-  }
-
-  CGF.EmitRuntimeCall(ObjCTypes.getExceptionThrowFn(), ExceptionAsObject)
-    ->setDoesNotReturn();
-  CGF.Builder.CreateUnreachable();
-
-  // Clear the insertion point to indicate we are in unreachable code.
-  if (ClearInsertionPoint)
-    CGF.Builder.ClearInsertionPoint();
-}
-
-/// EmitObjCWeakRead - Code gen for loading value of a __weak
-/// object: objc_read_weak (id *src)
-///
-llvm::Value * CGObjCMac::EmitObjCWeakRead(CodeGen::CodeGenFunction &CGF,
-                                          Address AddrWeakObj) {
-  llvm::Type* DestTy = AddrWeakObj.getElementType();
-  AddrWeakObj = CGF.Builder.CreateBitCast(AddrWeakObj,
-                                          ObjCTypes.PtrObjectPtrTy);
-  llvm::Value *read_weak =
-    CGF.EmitNounwindRuntimeCall(ObjCTypes.getGcReadWeakFn(),
-                                AddrWeakObj.getPointer(), "weakread");
-  read_weak = CGF.Builder.CreateBitCast(read_weak, DestTy);
-  return read_weak;
-}
-
-/// EmitObjCWeakAssign - Code gen for assigning to a __weak object.
-/// objc_assign_weak (id src, id *dst)
-///
-void CGObjCMac::EmitObjCWeakAssign(CodeGen::CodeGenFunction &CGF,
-                                   llvm::Value *src, Address dst) {
-  llvm::Type * SrcTy = src->getType();
-  if (!isa<llvm::PointerType>(SrcTy)) {
-    unsigned Size = CGM.getDataLayout().getTypeAllocSize(SrcTy);
-    assert(Size <= 8 && "does not support size > 8");
-    src = (Size == 4) ? CGF.Builder.CreateBitCast(src, CGM.Int32Ty)
-                      : CGF.Builder.CreateBitCast(src, CGM.Int64Ty);
-    src = CGF.Builder.CreateIntToPtr(src, ObjCTypes.Int8PtrTy);
-  }
-  src = CGF.Builder.CreateBitCast(src, ObjCTypes.ObjectPtrTy);
-  dst = CGF.Builder.CreateBitCast(dst, ObjCTypes.PtrObjectPtrTy);
-  llvm::Value *args[] = { src, dst.getPointer() };
-  CGF.EmitNounwindRuntimeCall(ObjCTypes.getGcAssignWeakFn(),
-                              args, "weakassign");
-}
-
-/// EmitObjCGlobalAssign - Code gen for assigning to a __strong object.
-/// objc_assign_global (id src, id *dst)
-///
-void CGObjCMac::EmitObjCGlobalAssign(CodeGen::CodeGenFunction &CGF,
-                                     llvm::Value *src, Address dst,
-                                     bool threadlocal) {
-  llvm::Type * SrcTy = src->getType();
-  if (!isa<llvm::PointerType>(SrcTy)) {
-    unsigned Size = CGM.getDataLayout().getTypeAllocSize(SrcTy);
-    assert(Size <= 8 && "does not support size > 8");
-    src = (Size == 4) ? CGF.Builder.CreateBitCast(src, CGM.Int32Ty)
-                      : CGF.Builder.CreateBitCast(src, CGM.Int64Ty);
-    src = CGF.Builder.CreateIntToPtr(src, ObjCTypes.Int8PtrTy);
-  }
-  src = CGF.Builder.CreateBitCast(src, ObjCTypes.ObjectPtrTy);
-  dst = CGF.Builder.CreateBitCast(dst, ObjCTypes.PtrObjectPtrTy);
-  llvm::Value *args[] = { src, dst.getPointer() };
-  if (!threadlocal)
-    CGF.EmitNounwindRuntimeCall(ObjCTypes.getGcAssignGlobalFn(),
-                                args, "globalassign");
-  else
-    CGF.EmitNounwindRuntimeCall(ObjCTypes.getGcAssignThreadLocalFn(),
-                                args, "threadlocalassign");
-}
-
-/// EmitObjCIvarAssign - Code gen for assigning to a __strong object.
-/// objc_assign_ivar (id src, id *dst, ptrdiff_t ivaroffset)
-///
-void CGObjCMac::EmitObjCIvarAssign(CodeGen::CodeGenFunction &CGF,
-                                   llvm::Value *src, Address dst,
-                                   llvm::Value *ivarOffset) {
-  assert(ivarOffset && "EmitObjCIvarAssign - ivarOffset is NULL");
-  llvm::Type * SrcTy = src->getType();
-  if (!isa<llvm::PointerType>(SrcTy)) {
-    unsigned Size = CGM.getDataLayout().getTypeAllocSize(SrcTy);
-    assert(Size <= 8 && "does not support size > 8");
-    src = (Size == 4) ? CGF.Builder.CreateBitCast(src, CGM.Int32Ty)
-                      : CGF.Builder.CreateBitCast(src, CGM.Int64Ty);
-    src = CGF.Builder.CreateIntToPtr(src, ObjCTypes.Int8PtrTy);
-  }
-  src = CGF.Builder.CreateBitCast(src, ObjCTypes.ObjectPtrTy);
-  dst = CGF.Builder.CreateBitCast(dst, ObjCTypes.PtrObjectPtrTy);
-  llvm::Value *args[] = { src, dst.getPointer(), ivarOffset };
-  CGF.EmitNounwindRuntimeCall(ObjCTypes.getGcAssignIvarFn(), args);
-}
-
-/// EmitObjCStrongCastAssign - Code gen for assigning to a __strong cast object.
-/// objc_assign_strongCast (id src, id *dst)
-///
-void CGObjCMac::EmitObjCStrongCastAssign(CodeGen::CodeGenFunction &CGF,
-                                         llvm::Value *src, Address dst) {
-  llvm::Type * SrcTy = src->getType();
-  if (!isa<llvm::PointerType>(SrcTy)) {
-    unsigned Size = CGM.getDataLayout().getTypeAllocSize(SrcTy);
-    assert(Size <= 8 && "does not support size > 8");
-    src = (Size == 4) ? CGF.Builder.CreateBitCast(src, CGM.Int32Ty)
-                      : CGF.Builder.CreateBitCast(src, CGM.Int64Ty);
-    src = CGF.Builder.CreateIntToPtr(src, ObjCTypes.Int8PtrTy);
-  }
-  src = CGF.Builder.CreateBitCast(src, ObjCTypes.ObjectPtrTy);
-  dst = CGF.Builder.CreateBitCast(dst, ObjCTypes.PtrObjectPtrTy);
-  llvm::Value *args[] = { src, dst.getPointer() };
-  CGF.EmitNounwindRuntimeCall(ObjCTypes.getGcAssignStrongCastFn(),
-                              args, "strongassign");
-}
-
-void CGObjCMac::EmitGCMemmoveCollectable(CodeGen::CodeGenFunction &CGF,
-                                         Address DestPtr,
-                                         Address SrcPtr,
-                                         llvm::Value *size) {
-  SrcPtr = CGF.Builder.CreateBitCast(SrcPtr, ObjCTypes.Int8PtrTy);
-  DestPtr = CGF.Builder.CreateBitCast(DestPtr, ObjCTypes.Int8PtrTy);
-  llvm::Value *args[] = { DestPtr.getPointer(), SrcPtr.getPointer(), size };
-  CGF.EmitNounwindRuntimeCall(ObjCTypes.GcMemmoveCollectableFn(), args);
-}
-
-/// EmitObjCValueForIvar - Code Gen for ivar reference.
-///
-LValue CGObjCMac::EmitObjCValueForIvar(CodeGen::CodeGenFunction &CGF,
-                                       QualType ObjectTy,
-                                       llvm::Value *BaseValue,
-                                       const ObjCIvarDecl *Ivar,
-                                       unsigned CVRQualifiers) {
-  const ObjCInterfaceDecl *ID =
-    ObjectTy->getAs<ObjCObjectType>()->getInterface();
-  return EmitValueForIvarAtOffset(CGF, ID, BaseValue, Ivar, CVRQualifiers,
-                                  EmitIvarOffset(CGF, ID, Ivar));
-}
-
-llvm::Value *CGObjCMac::EmitIvarOffset(CodeGen::CodeGenFunction &CGF,
-                                       const ObjCInterfaceDecl *Interface,
-                                       const ObjCIvarDecl *Ivar) {
-  uint64_t Offset = ComputeIvarBaseOffset(CGM, Interface, Ivar);
-  return llvm::ConstantInt::get(
-    CGM.getTypes().ConvertType(CGM.getContext().LongTy),
-    Offset);
-}
-
-/* *** Private Interface *** */
-
-std::string CGObjCCommonMac::GetSectionName(StringRef Section,
-                                            StringRef MachOAttributes) {
-  switch (CGM.getTriple().getObjectFormat()) {
-  default:
-    llvm_unreachable("unexpected object file format");
-  case llvm::Triple::MachO: {
-    if (MachOAttributes.empty())
-      return ("__DATA," + Section).str();
-    return ("__DATA," + Section + "," + MachOAttributes).str();
-  }
-  case llvm::Triple::ELF:
-    assert(Section.substr(0, 2) == "__" &&
-           "expected the name to begin with __");
-    return Section.substr(2).str();
-  case llvm::Triple::COFF:
-    assert(Section.substr(0, 2) == "__" &&
-           "expected the name to begin with __");
-    return ("." + Section.substr(2) + "$B").str();
-  }
-}
-
-/// EmitImageInfo - Emit the image info marker used to encode some module
-/// level information.
-///
-/// See: <rdr://4810609&4810587&4810587>
-/// struct IMAGE_INFO {
-///   unsigned version;
-///   unsigned flags;
-/// };
-enum ImageInfoFlags {
-  eImageInfo_FixAndContinue      = (1 << 0), // This flag is no longer set by clang.
-  eImageInfo_GarbageCollected    = (1 << 1),
-  eImageInfo_GCOnly              = (1 << 2),
-  eImageInfo_OptimizedByDyld     = (1 << 3), // This flag is set by the dyld shared cache.
-
-  // A flag indicating that the module has no instances of a @synthesize of a
-  // superclass variable. <rdar://problem/6803242>
-  eImageInfo_CorrectedSynthesize = (1 << 4), // This flag is no longer set by clang.
-  eImageInfo_ImageIsSimulated    = (1 << 5),
-  eImageInfo_ClassProperties     = (1 << 6)
-};
-
-void CGObjCCommonMac::EmitImageInfo() {
-  unsigned version = 0; // Version is unused?
-  std::string Section =
-      (ObjCABI == 1)
-          ? "__OBJC,__image_info,regular"
-          : GetSectionName("__objc_imageinfo", "regular,no_dead_strip");
-
-  // Generate module-level named metadata to convey this information to the
-  // linker and code-gen.
-  llvm::Module &Mod = CGM.getModule();
-
-  // Add the ObjC ABI version to the module flags.
-  Mod.addModuleFlag(llvm::Module::Error, "Objective-C Version", ObjCABI);
-  Mod.addModuleFlag(llvm::Module::Error, "Objective-C Image Info Version",
-                    version);
-  Mod.addModuleFlag(llvm::Module::Error, "Objective-C Image Info Section",
-                    llvm::MDString::get(VMContext, Section));
-
-  if (CGM.getLangOpts().getGC() == LangOptions::NonGC) {
-    // Non-GC overrides those files which specify GC.
-    Mod.addModuleFlag(llvm::Module::Override,
-                      "Objective-C Garbage Collection", (uint32_t)0);
-  } else {
-    // Add the ObjC garbage collection value.
-    Mod.addModuleFlag(llvm::Module::Error,
-                      "Objective-C Garbage Collection",
-                      eImageInfo_GarbageCollected);
-
-    if (CGM.getLangOpts().getGC() == LangOptions::GCOnly) {
-      // Add the ObjC GC Only value.
-      Mod.addModuleFlag(llvm::Module::Error, "Objective-C GC Only",
-                        eImageInfo_GCOnly);
-
-      // Require that GC be specified and set to eImageInfo_GarbageCollected.
-      llvm::Metadata *Ops[2] = {
-          llvm::MDString::get(VMContext, "Objective-C Garbage Collection"),
-          llvm::ConstantAsMetadata::get(llvm::ConstantInt::get(
-              llvm::Type::getInt32Ty(VMContext), eImageInfo_GarbageCollected))};
-      Mod.addModuleFlag(llvm::Module::Require, "Objective-C GC Only",
-                        llvm::MDNode::get(VMContext, Ops));
-    }
-  }
-
-  // Indicate whether we're compiling this to run on a simulator.
-  if (CGM.getTarget().getTriple().isSimulatorEnvironment())
-    Mod.addModuleFlag(llvm::Module::Error, "Objective-C Is Simulated",
-                      eImageInfo_ImageIsSimulated);
-
-  // Indicate whether we are generating class properties.
-  Mod.addModuleFlag(llvm::Module::Error, "Objective-C Class Properties",
-                    eImageInfo_ClassProperties);
-}
-
-// struct objc_module {
-//   unsigned long version;
-//   unsigned long size;
-//   const char *name;
-//   Symtab symtab;
-// };
-
-// FIXME: Get from somewhere
-static const int ModuleVersion = 7;
-
-void CGObjCMac::EmitModuleInfo() {
-  uint64_t Size = CGM.getDataLayout().getTypeAllocSize(ObjCTypes.ModuleTy);
-
-  ConstantInitBuilder builder(CGM);
-  auto values = builder.beginStruct(ObjCTypes.ModuleTy);
-  values.addInt(ObjCTypes.LongTy, ModuleVersion);
-  values.addInt(ObjCTypes.LongTy, Size);
-  // This used to be the filename, now it is unused. <rdr://4327263>
-  values.add(GetClassName(StringRef("")));
-  values.add(EmitModuleSymbols());
-  CreateMetadataVar("OBJC_MODULES", values,
-                    "__OBJC,__module_info,regular,no_dead_strip",
-                    CGM.getPointerAlign(), true);
-}
-
-llvm::Constant *CGObjCMac::EmitModuleSymbols() {
-  unsigned NumClasses = DefinedClasses.size();
-  unsigned NumCategories = DefinedCategories.size();
-
-  // Return null if no symbols were defined.
-  if (!NumClasses && !NumCategories)
-    return llvm::Constant::getNullValue(ObjCTypes.SymtabPtrTy);
-
-  ConstantInitBuilder builder(CGM);
-  auto values = builder.beginStruct();
-  values.addInt(ObjCTypes.LongTy, 0);
-  values.addNullPointer(ObjCTypes.SelectorPtrTy);
-  values.addInt(ObjCTypes.ShortTy, NumClasses);
-  values.addInt(ObjCTypes.ShortTy, NumCategories);
-
-  // The runtime expects exactly the list of defined classes followed
-  // by the list of defined categories, in a single array.
-  auto array = values.beginArray(ObjCTypes.Int8PtrTy);
-  for (unsigned i=0; i<NumClasses; i++) {
-    const ObjCInterfaceDecl *ID = ImplementedClasses[i];
-    assert(ID);
-    if (ObjCImplementationDecl *IMP = ID->getImplementation())
-      // We are implementing a weak imported interface. Give it external linkage
-      if (ID->isWeakImported() && !IMP->isWeakImported())
-        DefinedClasses[i]->setLinkage(llvm::GlobalVariable::ExternalLinkage);
-
-    array.addBitCast(DefinedClasses[i], ObjCTypes.Int8PtrTy);
-  }
-  for (unsigned i=0; i<NumCategories; i++)
-    array.addBitCast(DefinedCategories[i], ObjCTypes.Int8PtrTy);
-
-  array.finishAndAddTo(values);
-
-  llvm::GlobalVariable *GV = CreateMetadataVar(
-      "OBJC_SYMBOLS", values, "__OBJC,__symbols,regular,no_dead_strip",
-      CGM.getPointerAlign(), true);
-  return llvm::ConstantExpr::getBitCast(GV, ObjCTypes.SymtabPtrTy);
-}
-
-llvm::Value *CGObjCMac::EmitClassRefFromId(CodeGenFunction &CGF,
-                                           IdentifierInfo *II) {
-  LazySymbols.insert(II);
-
-  llvm::GlobalVariable *&Entry = ClassReferences[II];
-
-  if (!Entry) {
-    llvm::Constant *Casted =
-    llvm::ConstantExpr::getBitCast(GetClassName(II->getName()),
-                                   ObjCTypes.ClassPtrTy);
-    Entry = CreateMetadataVar(
-        "OBJC_CLASS_REFERENCES_", Casted,
-        "__OBJC,__cls_refs,literal_pointers,no_dead_strip",
-        CGM.getPointerAlign(), true);
-  }
-
-  return CGF.Builder.CreateAlignedLoad(Entry, CGF.getPointerAlign());
-}
-
-llvm::Value *CGObjCMac::EmitClassRef(CodeGenFunction &CGF,
-                                     const ObjCInterfaceDecl *ID) {
-  // If the class has the objc_runtime_visible attribute, we need to
-  // use the Objective-C runtime to get the class.
-  if (ID->hasAttr<ObjCRuntimeVisibleAttr>())
-    return EmitClassRefViaRuntime(CGF, ID, ObjCTypes);
-
-  IdentifierInfo *RuntimeName =
-      &CGM.getContext().Idents.get(ID->getObjCRuntimeNameAsString());
-  return EmitClassRefFromId(CGF, RuntimeName);
-}
-
-llvm::Value *CGObjCMac::EmitNSAutoreleasePoolClassRef(CodeGenFunction &CGF) {
-  IdentifierInfo *II = &CGM.getContext().Idents.get("NSAutoreleasePool");
-  return EmitClassRefFromId(CGF, II);
-}
-
-llvm::Value *CGObjCMac::EmitSelector(CodeGenFunction &CGF, Selector Sel) {
-  return CGF.Builder.CreateLoad(EmitSelectorAddr(CGF, Sel));
-}
-
-Address CGObjCMac::EmitSelectorAddr(CodeGenFunction &CGF, Selector Sel) {
-  CharUnits Align = CGF.getPointerAlign();
-
-  llvm::GlobalVariable *&Entry = SelectorReferences[Sel];
-  if (!Entry) {
-    llvm::Constant *Casted =
-      llvm::ConstantExpr::getBitCast(GetMethodVarName(Sel),
-                                     ObjCTypes.SelectorPtrTy);
-    Entry = CreateMetadataVar(
-        "OBJC_SELECTOR_REFERENCES_", Casted,
-        "__OBJC,__message_refs,literal_pointers,no_dead_strip", Align, true);
-    Entry->setExternallyInitialized(true);
-  }
-
-  return Address(Entry, Align);
-}
-
-llvm::Constant *CGObjCCommonMac::GetClassName(StringRef RuntimeName) {
-    llvm::GlobalVariable *&Entry = ClassNames[RuntimeName];
-    if (!Entry)
-      Entry = CreateCStringLiteral(RuntimeName, ObjCLabelType::ClassName);
-    return getConstantGEP(VMContext, Entry, 0, 0);
-}
-
-llvm::Function *CGObjCCommonMac::GetMethodDefinition(const ObjCMethodDecl *MD) {
-  llvm::DenseMap<const ObjCMethodDecl*, llvm::Function*>::iterator
-      I = MethodDefinitions.find(MD);
-  if (I != MethodDefinitions.end())
-    return I->second;
-
-  return nullptr;
-}
-
-/// GetIvarLayoutName - Returns a unique constant for the given
-/// ivar layout bitmap.
-llvm::Constant *CGObjCCommonMac::GetIvarLayoutName(IdentifierInfo *Ident,
-                                       const ObjCCommonTypesHelper &ObjCTypes) {
-  return llvm::Constant::getNullValue(ObjCTypes.Int8PtrTy);
-}
-
-void IvarLayoutBuilder::visitRecord(const RecordType *RT,
-                                    CharUnits offset) {
-  const RecordDecl *RD = RT->getDecl();
-
-  // If this is a union, remember that we had one, because it might mess
-  // up the ordering of layout entries.
-  if (RD->isUnion())
-    IsDisordered = true;
-
-  const ASTRecordLayout *recLayout = nullptr;
-  visitAggregate(RD->field_begin(), RD->field_end(), offset,
-                 [&](const FieldDecl *field) -> CharUnits {
-    if (!recLayout)
-      recLayout = &CGM.getContext().getASTRecordLayout(RD);
-    auto offsetInBits = recLayout->getFieldOffset(field->getFieldIndex());
-    return CGM.getContext().toCharUnitsFromBits(offsetInBits);
-  });
-}
-
-template <class Iterator, class GetOffsetFn>
-void IvarLayoutBuilder::visitAggregate(Iterator begin, Iterator end,
-                                       CharUnits aggregateOffset,
-                                       const GetOffsetFn &getOffset) {
-  for (; begin != end; ++begin) {
-    auto field = *begin;
-
-    // Skip over bitfields.
-    if (field->isBitField()) {
-      continue;
-    }
-
-    // Compute the offset of the field within the aggregate.
-    CharUnits fieldOffset = aggregateOffset + getOffset(field);
-
-    visitField(field, fieldOffset);
-  }
-}
-
-/// Collect layout information for the given fields into IvarsInfo.
-void IvarLayoutBuilder::visitField(const FieldDecl *field,
-                                   CharUnits fieldOffset) {
-  QualType fieldType = field->getType();
-
-  // Drill down into arrays.
-  uint64_t numElts = 1;
-  if (auto arrayType = CGM.getContext().getAsIncompleteArrayType(fieldType)) {
-    numElts = 0;
-    fieldType = arrayType->getElementType();
-  }
-  // Unlike incomplete arrays, constant arrays can be nested.
-  while (auto arrayType = CGM.getContext().getAsConstantArrayType(fieldType)) {
-    numElts *= arrayType->getSize().getZExtValue();
-    fieldType = arrayType->getElementType();
-  }
-
-  assert(!fieldType->isArrayType() && "ivar of non-constant array type?");
-
-  // If we ended up with a zero-sized array, we've done what we can do within
-  // the limits of this layout encoding.
-  if (numElts == 0) return;
-
-  // Recurse if the base element type is a record type.
-  if (auto recType = fieldType->getAs<RecordType>()) {
-    size_t oldEnd = IvarsInfo.size();
-
-    visitRecord(recType, fieldOffset);
-
-    // If we have an array, replicate the first entry's layout information.
-    auto numEltEntries = IvarsInfo.size() - oldEnd;
-    if (numElts != 1 && numEltEntries != 0) {
-      CharUnits eltSize = CGM.getContext().getTypeSizeInChars(recType);
-      for (uint64_t eltIndex = 1; eltIndex != numElts; ++eltIndex) {
-        // Copy the last numEltEntries onto the end of the array, adjusting
-        // each for the element size.
-        for (size_t i = 0; i != numEltEntries; ++i) {
-          auto firstEntry = IvarsInfo[oldEnd + i];
-          IvarsInfo.push_back(IvarInfo(firstEntry.Offset + eltIndex * eltSize,
-                                       firstEntry.SizeInWords));
-        }
-      }
-    }
-
-    return;
-  }
-
-  // Classify the element type.
-  Qualifiers::GC GCAttr = GetGCAttrTypeForType(CGM.getContext(), fieldType);
-
-  // If it matches what we're looking for, add an entry.
-  if ((ForStrongLayout && GCAttr == Qualifiers::Strong)
-      || (!ForStrongLayout && GCAttr == Qualifiers::Weak)) {
-    assert(CGM.getContext().getTypeSizeInChars(fieldType)
-             == CGM.getPointerSize());
-    IvarsInfo.push_back(IvarInfo(fieldOffset, numElts));
-  }
-}
-
-/// buildBitmap - This routine does the horsework of taking the offsets of
-/// strong/weak references and creating a bitmap.  The bitmap is also
-/// returned in the given buffer, suitable for being passed to \c dump().
-llvm::Constant *IvarLayoutBuilder::buildBitmap(CGObjCCommonMac &CGObjC,
-                                llvm::SmallVectorImpl<unsigned char> &buffer) {
-  // The bitmap is a series of skip/scan instructions, aligned to word
-  // boundaries.  The skip is performed first.
-  const unsigned char MaxNibble = 0xF;
-  const unsigned char SkipMask = 0xF0, SkipShift = 4;
-  const unsigned char ScanMask = 0x0F, ScanShift = 0;
-
-  assert(!IvarsInfo.empty() && "generating bitmap for no data");
-
-  // Sort the ivar info on byte position in case we encounterred a
-  // union nested in the ivar list.
-  if (IsDisordered) {
-    // This isn't a stable sort, but our algorithm should handle it fine.
-    llvm::array_pod_sort(IvarsInfo.begin(), IvarsInfo.end());
-  } else {
-    assert(std::is_sorted(IvarsInfo.begin(), IvarsInfo.end()));
-  }
-  assert(IvarsInfo.back().Offset < InstanceEnd);
-
-  assert(buffer.empty());
-
-  // Skip the next N words.
-  auto skip = [&](unsigned numWords) {
-    assert(numWords > 0);
-
-    // Try to merge into the previous byte.  Since scans happen second, we
-    // can't do this if it includes a scan.
-    if (!buffer.empty() && !(buffer.back() & ScanMask)) {
-      unsigned lastSkip = buffer.back() >> SkipShift;
-      if (lastSkip < MaxNibble) {
-        unsigned claimed = std::min(MaxNibble - lastSkip, numWords);
-        numWords -= claimed;
-        lastSkip += claimed;
-        buffer.back() = (lastSkip << SkipShift);
-      }
-    }
-
-    while (numWords >= MaxNibble) {
-      buffer.push_back(MaxNibble << SkipShift);
-      numWords -= MaxNibble;
-    }
-    if (numWords) {
-      buffer.push_back(numWords << SkipShift);
-    }
-  };
-
-  // Scan the next N words.
-  auto scan = [&](unsigned numWords) {
-    assert(numWords > 0);
-
-    // Try to merge into the previous byte.  Since scans happen second, we can
-    // do this even if it includes a skip.
-    if (!buffer.empty()) {
-      unsigned lastScan = (buffer.back() & ScanMask) >> ScanShift;
-      if (lastScan < MaxNibble) {
-        unsigned claimed = std::min(MaxNibble - lastScan, numWords);
-        numWords -= claimed;
-        lastScan += claimed;
-        buffer.back() = (buffer.back() & SkipMask) | (lastScan << ScanShift);
-      }
-    }
-
-    while (numWords >= MaxNibble) {
-      buffer.push_back(MaxNibble << ScanShift);
-      numWords -= MaxNibble;
-    }
-    if (numWords) {
-      buffer.push_back(numWords << ScanShift);
-    }
-  };
-
-  // One past the end of the last scan.
-  unsigned endOfLastScanInWords = 0;
-  const CharUnits WordSize = CGM.getPointerSize();
-
-  // Consider all the scan requests.
-  for (auto &request : IvarsInfo) {
-    CharUnits beginOfScan = request.Offset - InstanceBegin;
-
-    // Ignore scan requests that don't start at an even multiple of the
-    // word size.  We can't encode them.
-    if ((beginOfScan % WordSize) != 0) continue;
-
-    // Ignore scan requests that start before the instance start.
-    // This assumes that scans never span that boundary.  The boundary
-    // isn't the true start of the ivars, because in the fragile-ARC case
-    // it's rounded up to word alignment, but the test above should leave
-    // us ignoring that possibility.
-    if (beginOfScan.isNegative()) {
-      assert(request.Offset + request.SizeInWords * WordSize <= InstanceBegin);
-      continue;
-    }
-
-    unsigned beginOfScanInWords = beginOfScan / WordSize;
-    unsigned endOfScanInWords = beginOfScanInWords + request.SizeInWords;
-
-    // If the scan starts some number of words after the last one ended,
-    // skip forward.
-    if (beginOfScanInWords > endOfLastScanInWords) {
-      skip(beginOfScanInWords - endOfLastScanInWords);
-
-    // Otherwise, start scanning where the last left off.
-    } else {
-      beginOfScanInWords = endOfLastScanInWords;
-
-      // If that leaves us with nothing to scan, ignore this request.
-      if (beginOfScanInWords >= endOfScanInWords) continue;
-    }
-
-    // Scan to the end of the request.
-    assert(beginOfScanInWords < endOfScanInWords);
-    scan(endOfScanInWords - beginOfScanInWords);
-    endOfLastScanInWords = endOfScanInWords;
-  }
-
-  if (buffer.empty())
-    return llvm::ConstantPointerNull::get(CGM.Int8PtrTy);
-
-  // For GC layouts, emit a skip to the end of the allocation so that we
-  // have precise information about the entire thing.  This isn't useful
-  // or necessary for the ARC-style layout strings.
-  if (CGM.getLangOpts().getGC() != LangOptions::NonGC) {
-    unsigned lastOffsetInWords =
-      (InstanceEnd - InstanceBegin + WordSize - CharUnits::One()) / WordSize;
-    if (lastOffsetInWords > endOfLastScanInWords) {
-      skip(lastOffsetInWords - endOfLastScanInWords);
-    }
-  }
-
-  // Null terminate the string.
-  buffer.push_back(0);
-
-  auto *Entry = CGObjC.CreateCStringLiteral(
-      reinterpret_cast<char *>(buffer.data()), ObjCLabelType::ClassName);
-  return getConstantGEP(CGM.getLLVMContext(), Entry, 0, 0);
-}
-
-/// BuildIvarLayout - Builds ivar layout bitmap for the class
-/// implementation for the __strong or __weak case.
-/// The layout map displays which words in ivar list must be skipped
-/// and which must be scanned by GC (see below). String is built of bytes.
-/// Each byte is divided up in two nibbles (4-bit each). Left nibble is count
-/// of words to skip and right nibble is count of words to scan. So, each
-/// nibble represents up to 15 workds to skip or scan. Skipping the rest is
-/// represented by a 0x00 byte which also ends the string.
-/// 1. when ForStrongLayout is true, following ivars are scanned:
-/// - id, Class
-/// - object *
-/// - __strong anything
-///
-/// 2. When ForStrongLayout is false, following ivars are scanned:
-/// - __weak anything
-///
-llvm::Constant *
-CGObjCCommonMac::BuildIvarLayout(const ObjCImplementationDecl *OMD,
-                                 CharUnits beginOffset, CharUnits endOffset,
-                                 bool ForStrongLayout, bool HasMRCWeakIvars) {
-  // If this is MRC, and we're either building a strong layout or there
-  // are no weak ivars, bail out early.
-  llvm::Type *PtrTy = CGM.Int8PtrTy;
-  if (CGM.getLangOpts().getGC() == LangOptions::NonGC &&
-      !CGM.getLangOpts().ObjCAutoRefCount &&
-      (ForStrongLayout || !HasMRCWeakIvars))
-    return llvm::Constant::getNullValue(PtrTy);
-
-  const ObjCInterfaceDecl *OI = OMD->getClassInterface();
-  SmallVector<const ObjCIvarDecl*, 32> ivars;
-
-  // GC layout strings include the complete object layout, possibly
-  // inaccurately in the non-fragile ABI; the runtime knows how to fix this
-  // up.
-  //
-  // ARC layout strings only include the class's ivars.  In non-fragile
-  // runtimes, that means starting at InstanceStart, rounded up to word
-  // alignment.  In fragile runtimes, there's no InstanceStart, so it means
-  // starting at the offset of the first ivar, rounded up to word alignment.
-  //
-  // MRC weak layout strings follow the ARC style.
-  CharUnits baseOffset;
-  if (CGM.getLangOpts().getGC() == LangOptions::NonGC) {
-    for (const ObjCIvarDecl *IVD = OI->all_declared_ivar_begin();
-         IVD; IVD = IVD->getNextIvar())
-      ivars.push_back(IVD);
-
-    if (isNonFragileABI()) {
-      baseOffset = beginOffset; // InstanceStart
-    } else if (!ivars.empty()) {
-      baseOffset =
-        CharUnits::fromQuantity(ComputeIvarBaseOffset(CGM, OMD, ivars[0]));
-    } else {
-      baseOffset = CharUnits::Zero();
-    }
-
-    baseOffset = baseOffset.alignTo(CGM.getPointerAlign());
-  }
-  else {
-    CGM.getContext().DeepCollectObjCIvars(OI, true, ivars);
-
-    baseOffset = CharUnits::Zero();
-  }
-
-  if (ivars.empty())
-    return llvm::Constant::getNullValue(PtrTy);
-
-  IvarLayoutBuilder builder(CGM, baseOffset, endOffset, ForStrongLayout);
-
-  builder.visitAggregate(ivars.begin(), ivars.end(), CharUnits::Zero(),
-                         [&](const ObjCIvarDecl *ivar) -> CharUnits {
-      return CharUnits::fromQuantity(ComputeIvarBaseOffset(CGM, OMD, ivar));
-  });
-
-  if (!builder.hasBitmapData())
-    return llvm::Constant::getNullValue(PtrTy);
-
-  llvm::SmallVector<unsigned char, 4> buffer;
-  llvm::Constant *C = builder.buildBitmap(*this, buffer);
-
-   if (CGM.getLangOpts().ObjCGCBitmapPrint && !buffer.empty()) {
-    printf("\n%s ivar layout for class '%s': ",
-           ForStrongLayout ? "strong" : "weak",
-           OMD->getClassInterface()->getName().str().c_str());
-    builder.dump(buffer);
-  }
-  return C;
-}
-
-llvm::Constant *CGObjCCommonMac::GetMethodVarName(Selector Sel) {
-  llvm::GlobalVariable *&Entry = MethodVarNames[Sel];
-  // FIXME: Avoid std::string in "Sel.getAsString()"
-  if (!Entry)
-    Entry = CreateCStringLiteral(Sel.getAsString(), ObjCLabelType::MethodVarName);
-  return getConstantGEP(VMContext, Entry, 0, 0);
-}
-
-// FIXME: Merge into a single cstring creation function.
-llvm::Constant *CGObjCCommonMac::GetMethodVarName(IdentifierInfo *ID) {
-  return GetMethodVarName(CGM.getContext().Selectors.getNullarySelector(ID));
-}
-
-llvm::Constant *CGObjCCommonMac::GetMethodVarType(const FieldDecl *Field) {
-  std::string TypeStr;
-  CGM.getContext().getObjCEncodingForType(Field->getType(), TypeStr, Field);
-
-  llvm::GlobalVariable *&Entry = MethodVarTypes[TypeStr];
-  if (!Entry)
-    Entry = CreateCStringLiteral(TypeStr, ObjCLabelType::MethodVarType);
-  return getConstantGEP(VMContext, Entry, 0, 0);
-}
-
-llvm::Constant *CGObjCCommonMac::GetMethodVarType(const ObjCMethodDecl *D,
-                                                  bool Extended) {
-  std::string TypeStr =
-    CGM.getContext().getObjCEncodingForMethodDecl(D, Extended);
-
-  llvm::GlobalVariable *&Entry = MethodVarTypes[TypeStr];
-  if (!Entry)
-    Entry = CreateCStringLiteral(TypeStr, ObjCLabelType::MethodVarType);
-  return getConstantGEP(VMContext, Entry, 0, 0);
-}
-
-// FIXME: Merge into a single cstring creation function.
-llvm::Constant *CGObjCCommonMac::GetPropertyName(IdentifierInfo *Ident) {
-  llvm::GlobalVariable *&Entry = PropertyNames[Ident];
-  if (!Entry)
-    Entry = CreateCStringLiteral(Ident->getName(), ObjCLabelType::PropertyName);
-  return getConstantGEP(VMContext, Entry, 0, 0);
-}
-
-// FIXME: Merge into a single cstring creation function.
-// FIXME: This Decl should be more precise.
-llvm::Constant *
-CGObjCCommonMac::GetPropertyTypeString(const ObjCPropertyDecl *PD,
-                                       const Decl *Container) {
-  std::string TypeStr =
-    CGM.getContext().getObjCEncodingForPropertyDecl(PD, Container);
-  return GetPropertyName(&CGM.getContext().Idents.get(TypeStr));
-}
-
-void CGObjCCommonMac::GetNameForMethod(const ObjCMethodDecl *D,
-                                       const ObjCContainerDecl *CD,
-                                       SmallVectorImpl<char> &Name) {
-  llvm::raw_svector_ostream OS(Name);
-  assert (CD && "Missing container decl in GetNameForMethod");
-  OS << '\01' << (D->isInstanceMethod() ? '-' : '+')
-     << '[' << CD->getName();
-  if (const ObjCCategoryImplDecl *CID =
-      dyn_cast<ObjCCategoryImplDecl>(D->getDeclContext()))
-    OS << '(' << *CID << ')';
-  OS << ' ' << D->getSelector().getAsString() << ']';
-}
-
-void CGObjCMac::FinishModule() {
-  EmitModuleInfo();
-
-  // Emit the dummy bodies for any protocols which were referenced but
-  // never defined.
-  for (auto &entry : Protocols) {
-    llvm::GlobalVariable *global = entry.second;
-    if (global->hasInitializer())
-      continue;
-
-    ConstantInitBuilder builder(CGM);
-    auto values = builder.beginStruct(ObjCTypes.ProtocolTy);
-    values.addNullPointer(ObjCTypes.ProtocolExtensionPtrTy);
-    values.add(GetClassName(entry.first->getName()));
-    values.addNullPointer(ObjCTypes.ProtocolListPtrTy);
-    values.addNullPointer(ObjCTypes.MethodDescriptionListPtrTy);
-    values.addNullPointer(ObjCTypes.MethodDescriptionListPtrTy);
-    values.finishAndSetAsInitializer(global);
-    CGM.addCompilerUsedGlobal(global);
-  }
-
-  // Add assembler directives to add lazy undefined symbol references
-  // for classes which are referenced but not defined. This is
-  // important for correct linker interaction.
-  //
-  // FIXME: It would be nice if we had an LLVM construct for this.
-  if ((!LazySymbols.empty() || !DefinedSymbols.empty()) &&
-      CGM.getTriple().isOSBinFormatMachO()) {
-    SmallString<256> Asm;
-    Asm += CGM.getModule().getModuleInlineAsm();
-    if (!Asm.empty() && Asm.back() != '\n')
-      Asm += '\n';
-
-    llvm::raw_svector_ostream OS(Asm);
-    for (const auto *Sym : DefinedSymbols)
-      OS << "\t.objc_class_name_" << Sym->getName() << "=0\n"
-         << "\t.globl .objc_class_name_" << Sym->getName() << "\n";
-    for (const auto *Sym : LazySymbols)
-      OS << "\t.lazy_reference .objc_class_name_" << Sym->getName() << "\n";
-    for (const auto &Category : DefinedCategoryNames)
-      OS << "\t.objc_category_name_" << Category << "=0\n"
-         << "\t.globl .objc_category_name_" << Category << "\n";
-
-    CGM.getModule().setModuleInlineAsm(OS.str());
-  }
-}
-
-CGObjCNonFragileABIMac::CGObjCNonFragileABIMac(CodeGen::CodeGenModule &cgm)
-    : CGObjCCommonMac(cgm), ObjCTypes(cgm), ObjCEmptyCacheVar(nullptr),
-      ObjCEmptyVtableVar(nullptr) {
-  ObjCABI = 2;
-}
-
-/* *** */
-
-ObjCCommonTypesHelper::ObjCCommonTypesHelper(CodeGen::CodeGenModule &cgm)
-  : VMContext(cgm.getLLVMContext()), CGM(cgm), ExternalProtocolPtrTy(nullptr)
-{
-  CodeGen::CodeGenTypes &Types = CGM.getTypes();
-  ASTContext &Ctx = CGM.getContext();
-
-  ShortTy = cast<llvm::IntegerType>(Types.ConvertType(Ctx.ShortTy));
-  IntTy = CGM.IntTy;
-  LongTy = cast<llvm::IntegerType>(Types.ConvertType(Ctx.LongTy));
-  Int8PtrTy = CGM.Int8PtrTy;
-  Int8PtrPtrTy = CGM.Int8PtrPtrTy;
-
-  // arm64 targets use "int" ivar offset variables. All others,
-  // including OS X x86_64 and Windows x86_64, use "long" ivar offsets.
-  if (CGM.getTarget().getTriple().getArch() == llvm::Triple::aarch64)
-    IvarOffsetVarTy = IntTy;
-  else
-    IvarOffsetVarTy = LongTy;
-
-  ObjectPtrTy =
-    cast<llvm::PointerType>(Types.ConvertType(Ctx.getObjCIdType()));
-  PtrObjectPtrTy =
-    llvm::PointerType::getUnqual(ObjectPtrTy);
-  SelectorPtrTy =
-    cast<llvm::PointerType>(Types.ConvertType(Ctx.getObjCSelType()));
-
-  // I'm not sure I like this. The implicit coordination is a bit
-  // gross. We should solve this in a reasonable fashion because this
-  // is a pretty common task (match some runtime data structure with
-  // an LLVM data structure).
-
-  // FIXME: This is leaked.
-  // FIXME: Merge with rewriter code?
-
-  // struct _objc_super {
-  //   id self;
-  //   Class cls;
-  // }
-  RecordDecl *RD = RecordDecl::Create(Ctx, TTK_Struct,
-                                      Ctx.getTranslationUnitDecl(),
-                                      SourceLocation(), SourceLocation(),
-                                      &Ctx.Idents.get("_objc_super"));
-  RD->addDecl(FieldDecl::Create(Ctx, RD, SourceLocation(), SourceLocation(),
-                                nullptr, Ctx.getObjCIdType(), nullptr, nullptr,
-                                false, ICIS_NoInit));
-  RD->addDecl(FieldDecl::Create(Ctx, RD, SourceLocation(), SourceLocation(),
-                                nullptr, Ctx.getObjCClassType(), nullptr,
-                                nullptr, false, ICIS_NoInit));
-  RD->completeDefinition();
-
-  SuperCTy = Ctx.getTagDeclType(RD);
-  SuperPtrCTy = Ctx.getPointerType(SuperCTy);
-
-  SuperTy = cast<llvm::StructType>(Types.ConvertType(SuperCTy));
-  SuperPtrTy = llvm::PointerType::getUnqual(SuperTy);
-
-  // struct _prop_t {
-  //   char *name;
-  //   char *attributes;
-  // }
-  PropertyTy = llvm::StructType::create("struct._prop_t", Int8PtrTy, Int8PtrTy);
-
-  // struct _prop_list_t {
-  //   uint32_t entsize;      // sizeof(struct _prop_t)
-  //   uint32_t count_of_properties;
-  //   struct _prop_t prop_list[count_of_properties];
-  // }
-  PropertyListTy = llvm::StructType::create(
-      "struct._prop_list_t", IntTy, IntTy, llvm::ArrayType::get(PropertyTy, 0));
-  // struct _prop_list_t *
-  PropertyListPtrTy = llvm::PointerType::getUnqual(PropertyListTy);
-
-  // struct _objc_method {
-  //   SEL _cmd;
-  //   char *method_type;
-  //   char *_imp;
-  // }
-  MethodTy = llvm::StructType::create("struct._objc_method", SelectorPtrTy,
-                                      Int8PtrTy, Int8PtrTy);
-
-  // struct _objc_cache *
-  CacheTy = llvm::StructType::create(VMContext, "struct._objc_cache");
-  CachePtrTy = llvm::PointerType::getUnqual(CacheTy);
-}
-
-ObjCTypesHelper::ObjCTypesHelper(CodeGen::CodeGenModule &cgm)
-  : ObjCCommonTypesHelper(cgm) {
-  // struct _objc_method_description {
-  //   SEL name;
-  //   char *types;
-  // }
-  MethodDescriptionTy = llvm::StructType::create(
-      "struct._objc_method_description", SelectorPtrTy, Int8PtrTy);
-
-  // struct _objc_method_description_list {
-  //   int count;
-  //   struct _objc_method_description[1];
-  // }
-  MethodDescriptionListTy =
-      llvm::StructType::create("struct._objc_method_description_list", IntTy,
-                               llvm::ArrayType::get(MethodDescriptionTy, 0));
-
-  // struct _objc_method_description_list *
-  MethodDescriptionListPtrTy =
-    llvm::PointerType::getUnqual(MethodDescriptionListTy);
-
-  // Protocol description structures
-
-  // struct _objc_protocol_extension {
-  //   uint32_t size;  // sizeof(struct _objc_protocol_extension)
-  //   struct _objc_method_description_list *optional_instance_methods;
-  //   struct _objc_method_description_list *optional_class_methods;
-  //   struct _objc_property_list *instance_properties;
-  //   const char ** extendedMethodTypes;
-  //   struct _objc_property_list *class_properties;
-  // }
-  ProtocolExtensionTy = llvm::StructType::create(
-      "struct._objc_protocol_extension", IntTy, MethodDescriptionListPtrTy,
-      MethodDescriptionListPtrTy, PropertyListPtrTy, Int8PtrPtrTy,
-      PropertyListPtrTy);
-
-  // struct _objc_protocol_extension *
-  ProtocolExtensionPtrTy = llvm::PointerType::getUnqual(ProtocolExtensionTy);
-
-  // Handle recursive construction of Protocol and ProtocolList types
-
-  ProtocolTy =
-    llvm::StructType::create(VMContext, "struct._objc_protocol");
-
-  ProtocolListTy =
-    llvm::StructType::create(VMContext, "struct._objc_protocol_list");
-  ProtocolListTy->setBody(llvm::PointerType::getUnqual(ProtocolListTy), LongTy,
-                          llvm::ArrayType::get(ProtocolTy, 0));
-
-  // struct _objc_protocol {
-  //   struct _objc_protocol_extension *isa;
-  //   char *protocol_name;
-  //   struct _objc_protocol **_objc_protocol_list;
-  //   struct _objc_method_description_list *instance_methods;
-  //   struct _objc_method_description_list *class_methods;
-  // }
-  ProtocolTy->setBody(ProtocolExtensionPtrTy, Int8PtrTy,
-                      llvm::PointerType::getUnqual(ProtocolListTy),
-                      MethodDescriptionListPtrTy, MethodDescriptionListPtrTy);
-
-  // struct _objc_protocol_list *
-  ProtocolListPtrTy = llvm::PointerType::getUnqual(ProtocolListTy);
-
-  ProtocolPtrTy = llvm::PointerType::getUnqual(ProtocolTy);
-
-  // Class description structures
-
-  // struct _objc_ivar {
-  //   char *ivar_name;
-  //   char *ivar_type;
-  //   int  ivar_offset;
-  // }
-  IvarTy = llvm::StructType::create("struct._objc_ivar", Int8PtrTy, Int8PtrTy,
-                                    IntTy);
-
-  // struct _objc_ivar_list *
-  IvarListTy =
-    llvm::StructType::create(VMContext, "struct._objc_ivar_list");
-  IvarListPtrTy = llvm::PointerType::getUnqual(IvarListTy);
-
-  // struct _objc_method_list *
-  MethodListTy =
-    llvm::StructType::create(VMContext, "struct._objc_method_list");
-  MethodListPtrTy = llvm::PointerType::getUnqual(MethodListTy);
-
-  // struct _objc_class_extension *
-  ClassExtensionTy = llvm::StructType::create(
-      "struct._objc_class_extension", IntTy, Int8PtrTy, PropertyListPtrTy);
-  ClassExtensionPtrTy = llvm::PointerType::getUnqual(ClassExtensionTy);
-
-  ClassTy = llvm::StructType::create(VMContext, "struct._objc_class");
-
-  // struct _objc_class {
-  //   Class isa;
-  //   Class super_class;
-  //   char *name;
-  //   long version;
-  //   long info;
-  //   long instance_size;
-  //   struct _objc_ivar_list *ivars;
-  //   struct _objc_method_list *methods;
-  //   struct _objc_cache *cache;
-  //   struct _objc_protocol_list *protocols;
-  //   char *ivar_layout;
-  //   struct _objc_class_ext *ext;
-  // };
-  ClassTy->setBody(llvm::PointerType::getUnqual(ClassTy),
-                   llvm::PointerType::getUnqual(ClassTy), Int8PtrTy, LongTy,
-                   LongTy, LongTy, IvarListPtrTy, MethodListPtrTy, CachePtrTy,
-                   ProtocolListPtrTy, Int8PtrTy, ClassExtensionPtrTy);
-
-  ClassPtrTy = llvm::PointerType::getUnqual(ClassTy);
-
-  // struct _objc_category {
-  //   char *category_name;
-  //   char *class_name;
-  //   struct _objc_method_list *instance_method;
-  //   struct _objc_method_list *class_method;
-  //   struct _objc_protocol_list *protocols;
-  //   uint32_t size;  // sizeof(struct _objc_category)
-  //   struct _objc_property_list *instance_properties;// category's @property
-  //   struct _objc_property_list *class_properties;
-  // }
-  CategoryTy = llvm::StructType::create(
-      "struct._objc_category", Int8PtrTy, Int8PtrTy, MethodListPtrTy,
-      MethodListPtrTy, ProtocolListPtrTy, IntTy, PropertyListPtrTy,
-      PropertyListPtrTy);
-
-  // Global metadata structures
-
-  // struct _objc_symtab {
-  //   long sel_ref_cnt;
-  //   SEL *refs;
-  //   short cls_def_cnt;
-  //   short cat_def_cnt;
-  //   char *defs[cls_def_cnt + cat_def_cnt];
-  // }
-  SymtabTy = llvm::StructType::create("struct._objc_symtab", LongTy,
-                                      SelectorPtrTy, ShortTy, ShortTy,
-                                      llvm::ArrayType::get(Int8PtrTy, 0));
-  SymtabPtrTy = llvm::PointerType::getUnqual(SymtabTy);
-
-  // struct _objc_module {
-  //   long version;
-  //   long size;   // sizeof(struct _objc_module)
-  //   char *name;
-  //   struct _objc_symtab* symtab;
-  //  }
-  ModuleTy = llvm::StructType::create("struct._objc_module", LongTy, LongTy,
-                                      Int8PtrTy, SymtabPtrTy);
-
-  // FIXME: This is the size of the setjmp buffer and should be target
-  // specific. 18 is what's used on 32-bit X86.
-  uint64_t SetJmpBufferSize = 18;
-
-  // Exceptions
-  llvm::Type *StackPtrTy = llvm::ArrayType::get(CGM.Int8PtrTy, 4);
-
-  ExceptionDataTy = llvm::StructType::create(
-      "struct._objc_exception_data",
-      llvm::ArrayType::get(CGM.Int32Ty, SetJmpBufferSize), StackPtrTy);
-}
-
-ObjCNonFragileABITypesHelper::ObjCNonFragileABITypesHelper(CodeGen::CodeGenModule &cgm)
-  : ObjCCommonTypesHelper(cgm) {
-  // struct _method_list_t {
-  //   uint32_t entsize;  // sizeof(struct _objc_method)
-  //   uint32_t method_count;
-  //   struct _objc_method method_list[method_count];
-  // }
-  MethodListnfABITy =
-      llvm::StructType::create("struct.__method_list_t", IntTy, IntTy,
-                               llvm::ArrayType::get(MethodTy, 0));
-  // struct method_list_t *
-  MethodListnfABIPtrTy = llvm::PointerType::getUnqual(MethodListnfABITy);
-
-  // struct _protocol_t {
-  //   id isa;  // NULL
-  //   const char * const protocol_name;
-  //   const struct _protocol_list_t * protocol_list; // super protocols
-  //   const struct method_list_t * const instance_methods;
-  //   const struct method_list_t * const class_methods;
-  //   const struct method_list_t *optionalInstanceMethods;
-  //   const struct method_list_t *optionalClassMethods;
-  //   const struct _prop_list_t * properties;
-  //   const uint32_t size;  // sizeof(struct _protocol_t)
-  //   const uint32_t flags;  // = 0
-  //   const char ** extendedMethodTypes;
-  //   const char *demangledName;
-  //   const struct _prop_list_t * class_properties;
-  // }
-
-  // Holder for struct _protocol_list_t *
-  ProtocolListnfABITy =
-    llvm::StructType::create(VMContext, "struct._objc_protocol_list");
-
-  ProtocolnfABITy = llvm::StructType::create(
-      "struct._protocol_t", ObjectPtrTy, Int8PtrTy,
-      llvm::PointerType::getUnqual(ProtocolListnfABITy), MethodListnfABIPtrTy,
-      MethodListnfABIPtrTy, MethodListnfABIPtrTy, MethodListnfABIPtrTy,
-      PropertyListPtrTy, IntTy, IntTy, Int8PtrPtrTy, Int8PtrTy,
-      PropertyListPtrTy);
-
-  // struct _protocol_t*
-  ProtocolnfABIPtrTy = llvm::PointerType::getUnqual(ProtocolnfABITy);
-
-  // struct _protocol_list_t {
-  //   long protocol_count;   // Note, this is 32/64 bit
-  //   struct _protocol_t *[protocol_count];
-  // }
-  ProtocolListnfABITy->setBody(LongTy,
-                               llvm::ArrayType::get(ProtocolnfABIPtrTy, 0));
-
-  // struct _objc_protocol_list*
-  ProtocolListnfABIPtrTy = llvm::PointerType::getUnqual(ProtocolListnfABITy);
-
-  // struct _ivar_t {
-  //   unsigned [long] int *offset;  // pointer to ivar offset location
-  //   char *name;
-  //   char *type;
-  //   uint32_t alignment;
-  //   uint32_t size;
-  // }
-  IvarnfABITy = llvm::StructType::create(
-      "struct._ivar_t", llvm::PointerType::getUnqual(IvarOffsetVarTy),
-      Int8PtrTy, Int8PtrTy, IntTy, IntTy);
-
-  // struct _ivar_list_t {
-  //   uint32 entsize;  // sizeof(struct _ivar_t)
-  //   uint32 count;
-  //   struct _iver_t list[count];
-  // }
-  IvarListnfABITy =
-      llvm::StructType::create("struct._ivar_list_t", IntTy, IntTy,
-                               llvm::ArrayType::get(IvarnfABITy, 0));
-
-  IvarListnfABIPtrTy = llvm::PointerType::getUnqual(IvarListnfABITy);
-
-  // struct _class_ro_t {
-  //   uint32_t const flags;
-  //   uint32_t const instanceStart;
-  //   uint32_t const instanceSize;
-  //   uint32_t const reserved;  // only when building for 64bit targets
-  //   const uint8_t * const ivarLayout;
-  //   const char *const name;
-  //   const struct _method_list_t * const baseMethods;
-  //   const struct _objc_protocol_list *const baseProtocols;
-  //   const struct _ivar_list_t *const ivars;
-  //   const uint8_t * const weakIvarLayout;
-  //   const struct _prop_list_t * const properties;
-  // }
-
-  // FIXME. Add 'reserved' field in 64bit abi mode!
-  ClassRonfABITy = llvm::StructType::create(
-      "struct._class_ro_t", IntTy, IntTy, IntTy, Int8PtrTy, Int8PtrTy,
-      MethodListnfABIPtrTy, ProtocolListnfABIPtrTy, IvarListnfABIPtrTy,
-      Int8PtrTy, PropertyListPtrTy);
-
-  // ImpnfABITy - LLVM for id (*)(id, SEL, ...)
-  llvm::Type *params[] = { ObjectPtrTy, SelectorPtrTy };
-  ImpnfABITy = llvm::FunctionType::get(ObjectPtrTy, params, false)
-                 ->getPointerTo();
-
-  // struct _class_t {
-  //   struct _class_t *isa;
-  //   struct _class_t * const superclass;
-  //   void *cache;
-  //   IMP *vtable;
-  //   struct class_ro_t *ro;
-  // }
-
-  ClassnfABITy = llvm::StructType::create(VMContext, "struct._class_t");
-  ClassnfABITy->setBody(llvm::PointerType::getUnqual(ClassnfABITy),
-                        llvm::PointerType::getUnqual(ClassnfABITy), CachePtrTy,
-                        llvm::PointerType::getUnqual(ImpnfABITy),
-                        llvm::PointerType::getUnqual(ClassRonfABITy));
-
-  // LLVM for struct _class_t *
-  ClassnfABIPtrTy = llvm::PointerType::getUnqual(ClassnfABITy);
-
-  // struct _category_t {
-  //   const char * const name;
-  //   struct _class_t *const cls;
-  //   const struct _method_list_t * const instance_methods;
-  //   const struct _method_list_t * const class_methods;
-  //   const struct _protocol_list_t * const protocols;
-  //   const struct _prop_list_t * const properties;
-  //   const struct _prop_list_t * const class_properties;
-  //   const uint32_t size;
-  // }
-  CategorynfABITy = llvm::StructType::create(
-      "struct._category_t", Int8PtrTy, ClassnfABIPtrTy, MethodListnfABIPtrTy,
-      MethodListnfABIPtrTy, ProtocolListnfABIPtrTy, PropertyListPtrTy,
-      PropertyListPtrTy, IntTy);
-
-  // New types for nonfragile abi messaging.
-  CodeGen::CodeGenTypes &Types = CGM.getTypes();
-  ASTContext &Ctx = CGM.getContext();
-
-  // MessageRefTy - LLVM for:
-  // struct _message_ref_t {
-  //   IMP messenger;
-  //   SEL name;
-  // };
-
-  // First the clang type for struct _message_ref_t
-  RecordDecl *RD = RecordDecl::Create(Ctx, TTK_Struct,
-                                      Ctx.getTranslationUnitDecl(),
-                                      SourceLocation(), SourceLocation(),
-                                      &Ctx.Idents.get("_message_ref_t"));
-  RD->addDecl(FieldDecl::Create(Ctx, RD, SourceLocation(), SourceLocation(),
-                                nullptr, Ctx.VoidPtrTy, nullptr, nullptr, false,
-                                ICIS_NoInit));
-  RD->addDecl(FieldDecl::Create(Ctx, RD, SourceLocation(), SourceLocation(),
-                                nullptr, Ctx.getObjCSelType(), nullptr, nullptr,
-                                false, ICIS_NoInit));
-  RD->completeDefinition();
-
-  MessageRefCTy = Ctx.getTagDeclType(RD);
-  MessageRefCPtrTy = Ctx.getPointerType(MessageRefCTy);
-  MessageRefTy = cast<llvm::StructType>(Types.ConvertType(MessageRefCTy));
-
-  // MessageRefPtrTy - LLVM for struct _message_ref_t*
-  MessageRefPtrTy = llvm::PointerType::getUnqual(MessageRefTy);
-
-  // SuperMessageRefTy - LLVM for:
-  // struct _super_message_ref_t {
-  //   SUPER_IMP messenger;
-  //   SEL name;
-  // };
-  SuperMessageRefTy = llvm::StructType::create("struct._super_message_ref_t",
-                                               ImpnfABITy, SelectorPtrTy);
-
-  // SuperMessageRefPtrTy - LLVM for struct _super_message_ref_t*
-  SuperMessageRefPtrTy = llvm::PointerType::getUnqual(SuperMessageRefTy);
-
-
-  // struct objc_typeinfo {
-  //   const void** vtable; // objc_ehtype_vtable + 2
-  //   const char*  name;    // c++ typeinfo string
-  //   Class        cls;
-  // };
-  EHTypeTy = llvm::StructType::create("struct._objc_typeinfo",
-                                      llvm::PointerType::getUnqual(Int8PtrTy),
-                                      Int8PtrTy, ClassnfABIPtrTy);
-  EHTypePtrTy = llvm::PointerType::getUnqual(EHTypeTy);
-}
-
-llvm::Function *CGObjCNonFragileABIMac::ModuleInitFunction() {
-  FinishNonFragileABIModule();
-
-  return nullptr;
-}
-
-void CGObjCNonFragileABIMac::AddModuleClassList(
-    ArrayRef<llvm::GlobalValue *> Container, StringRef SymbolName,
-    StringRef SectionName) {
-  unsigned NumClasses = Container.size();
-
-  if (!NumClasses)
-    return;
-
-  SmallVector<llvm::Constant*, 8> Symbols(NumClasses);
-  for (unsigned i=0; i<NumClasses; i++)
-    Symbols[i] = llvm::ConstantExpr::getBitCast(Container[i],
-                                                ObjCTypes.Int8PtrTy);
-  llvm::Constant *Init =
-    llvm::ConstantArray::get(llvm::ArrayType::get(ObjCTypes.Int8PtrTy,
-                                                  Symbols.size()),
-                             Symbols);
-
-  llvm::GlobalVariable *GV =
-    new llvm::GlobalVariable(CGM.getModule(), Init->getType(), false,
-                             llvm::GlobalValue::PrivateLinkage,
-                             Init,
-                             SymbolName);
-  GV->setAlignment(CGM.getDataLayout().getABITypeAlignment(Init->getType()));
-  GV->setSection(SectionName);
-  CGM.addCompilerUsedGlobal(GV);
-}
-
-void CGObjCNonFragileABIMac::FinishNonFragileABIModule() {
-  // nonfragile abi has no module definition.
-
-  // Build list of all implemented class addresses in array
-  // L_OBJC_LABEL_CLASS_$.
-
-  for (unsigned i=0, NumClasses=ImplementedClasses.size(); i<NumClasses; i++) {
-    const ObjCInterfaceDecl *ID = ImplementedClasses[i];
-    assert(ID);
-    if (ObjCImplementationDecl *IMP = ID->getImplementation())
-      // We are implementing a weak imported interface. Give it external linkage
-      if (ID->isWeakImported() && !IMP->isWeakImported()) {
-        DefinedClasses[i]->setLinkage(llvm::GlobalVariable::ExternalLinkage);
-        DefinedMetaClasses[i]->setLinkage(llvm::GlobalVariable::ExternalLinkage);
-      }
-  }
-
-  AddModuleClassList(DefinedClasses, "OBJC_LABEL_CLASS_$",
-                     GetSectionName("__objc_classlist",
-                                    "regular,no_dead_strip"));
-
-  AddModuleClassList(DefinedNonLazyClasses, "OBJC_LABEL_NONLAZY_CLASS_$",
-                     GetSectionName("__objc_nlclslist",
-                                    "regular,no_dead_strip"));
-
-  // Build list of all implemented category addresses in array
-  // L_OBJC_LABEL_CATEGORY_$.
-  AddModuleClassList(DefinedCategories, "OBJC_LABEL_CATEGORY_$",
-                     GetSectionName("__objc_catlist",
-                                    "regular,no_dead_strip"));
-  AddModuleClassList(DefinedNonLazyCategories, "OBJC_LABEL_NONLAZY_CATEGORY_$",
-                     GetSectionName("__objc_nlcatlist",
-                                    "regular,no_dead_strip"));
-
-  EmitImageInfo();
-}
-
-/// isVTableDispatchedSelector - Returns true if SEL is not in the list of
-/// VTableDispatchMethods; false otherwise. What this means is that
-/// except for the 19 selectors in the list, we generate 32bit-style
-/// message dispatch call for all the rest.
-bool CGObjCNonFragileABIMac::isVTableDispatchedSelector(Selector Sel) {
-  // At various points we've experimented with using vtable-based
-  // dispatch for all methods.
-  switch (CGM.getCodeGenOpts().getObjCDispatchMethod()) {
-  case CodeGenOptions::Legacy:
-    return false;
-  case CodeGenOptions::NonLegacy:
-    return true;
-  case CodeGenOptions::Mixed:
-    break;
-  }
-
-  // If so, see whether this selector is in the white-list of things which must
-  // use the new dispatch convention. We lazily build a dense set for this.
-  if (VTableDispatchMethods.empty()) {
-    VTableDispatchMethods.insert(GetNullarySelector("alloc"));
-    VTableDispatchMethods.insert(GetNullarySelector("class"));
-    VTableDispatchMethods.insert(GetNullarySelector("self"));
-    VTableDispatchMethods.insert(GetNullarySelector("isFlipped"));
-    VTableDispatchMethods.insert(GetNullarySelector("length"));
-    VTableDispatchMethods.insert(GetNullarySelector("count"));
-
-    // These are vtable-based if GC is disabled.
-    // Optimistically use vtable dispatch for hybrid compiles.
-    if (CGM.getLangOpts().getGC() != LangOptions::GCOnly) {
-      VTableDispatchMethods.insert(GetNullarySelector("retain"));
-      VTableDispatchMethods.insert(GetNullarySelector("release"));
-      VTableDispatchMethods.insert(GetNullarySelector("autorelease"));
-    }
-
-    VTableDispatchMethods.insert(GetUnarySelector("allocWithZone"));
-    VTableDispatchMethods.insert(GetUnarySelector("isKindOfClass"));
-    VTableDispatchMethods.insert(GetUnarySelector("respondsToSelector"));
-    VTableDispatchMethods.insert(GetUnarySelector("objectForKey"));
-    VTableDispatchMethods.insert(GetUnarySelector("objectAtIndex"));
-    VTableDispatchMethods.insert(GetUnarySelector("isEqualToString"));
-    VTableDispatchMethods.insert(GetUnarySelector("isEqual"));
-
-    // These are vtable-based if GC is enabled.
-    // Optimistically use vtable dispatch for hybrid compiles.
-    if (CGM.getLangOpts().getGC() != LangOptions::NonGC) {
-      VTableDispatchMethods.insert(GetNullarySelector("hash"));
-      VTableDispatchMethods.insert(GetUnarySelector("addObject"));
-
-      // "countByEnumeratingWithState:objects:count"
-      IdentifierInfo *KeyIdents[] = {
-        &CGM.getContext().Idents.get("countByEnumeratingWithState"),
-        &CGM.getContext().Idents.get("objects"),
-        &CGM.getContext().Idents.get("count")
-      };
-      VTableDispatchMethods.insert(
-        CGM.getContext().Selectors.getSelector(3, KeyIdents));
-    }
-  }
-
-  return VTableDispatchMethods.count(Sel);
-}
-
-/// BuildClassRoTInitializer - generate meta-data for:
-/// struct _class_ro_t {
-///   uint32_t const flags;
-///   uint32_t const instanceStart;
-///   uint32_t const instanceSize;
-///   uint32_t const reserved;  // only when building for 64bit targets
-///   const uint8_t * const ivarLayout;
-///   const char *const name;
-///   const struct _method_list_t * const baseMethods;
-///   const struct _protocol_list_t *const baseProtocols;
-///   const struct _ivar_list_t *const ivars;
-///   const uint8_t * const weakIvarLayout;
-///   const struct _prop_list_t * const properties;
-/// }
-///
-llvm::GlobalVariable * CGObjCNonFragileABIMac::BuildClassRoTInitializer(
-  unsigned flags,
-  unsigned InstanceStart,
-  unsigned InstanceSize,
-  const ObjCImplementationDecl *ID) {
-  std::string ClassName = ID->getObjCRuntimeNameAsString();
-
-  CharUnits beginInstance = CharUnits::fromQuantity(InstanceStart);
-  CharUnits endInstance = CharUnits::fromQuantity(InstanceSize);
-
-  bool hasMRCWeak = false;
-  if (CGM.getLangOpts().ObjCAutoRefCount)
-    flags |= NonFragileABI_Class_CompiledByARC;
-  else if ((hasMRCWeak = hasMRCWeakIvars(CGM, ID)))
-    flags |= NonFragileABI_Class_HasMRCWeakIvars;
-
-  ConstantInitBuilder builder(CGM);
-  auto values = builder.beginStruct(ObjCTypes.ClassRonfABITy);
-
-  values.addInt(ObjCTypes.IntTy, flags);
-  values.addInt(ObjCTypes.IntTy, InstanceStart);
-  values.addInt(ObjCTypes.IntTy, InstanceSize);
-  values.add((flags & NonFragileABI_Class_Meta)
-                ? GetIvarLayoutName(nullptr, ObjCTypes)
-                : BuildStrongIvarLayout(ID, beginInstance, endInstance));
-  values.add(GetClassName(ID->getObjCRuntimeNameAsString()));
-
-  // const struct _method_list_t * const baseMethods;
-  SmallVector<const ObjCMethodDecl*, 16> methods;
-  if (flags & NonFragileABI_Class_Meta) {
-    for (const auto *MD : ID->class_methods())
-      methods.push_back(MD);
-  } else {
-    for (const auto *MD : ID->instance_methods())
-      methods.push_back(MD);
-
-    for (const auto *PID : ID->property_impls()) {
-      if (PID->getPropertyImplementation() == ObjCPropertyImplDecl::Synthesize){
-        ObjCPropertyDecl *PD = PID->getPropertyDecl();
-
-        if (auto MD = PD->getGetterMethodDecl())
-          if (GetMethodDefinition(MD))
-            methods.push_back(MD);
-        if (auto MD = PD->getSetterMethodDecl())
-          if (GetMethodDefinition(MD))
-            methods.push_back(MD);
-      }
-    }
-  }
-
-  values.add(emitMethodList(ID->getObjCRuntimeNameAsString(),
-                            (flags & NonFragileABI_Class_Meta)
-                               ? MethodListType::ClassMethods
-                               : MethodListType::InstanceMethods,
-                            methods));
-
-  const ObjCInterfaceDecl *OID = ID->getClassInterface();
-  assert(OID && "CGObjCNonFragileABIMac::BuildClassRoTInitializer");
-  values.add(EmitProtocolList("\01l_OBJC_CLASS_PROTOCOLS_$_"
-                                + OID->getObjCRuntimeNameAsString(),
-                              OID->all_referenced_protocol_begin(),
-                              OID->all_referenced_protocol_end()));
-
-  if (flags & NonFragileABI_Class_Meta) {
-    values.addNullPointer(ObjCTypes.IvarListnfABIPtrTy);
-    values.add(GetIvarLayoutName(nullptr, ObjCTypes));
-    values.add(EmitPropertyList(
-        "\01l_OBJC_$_CLASS_PROP_LIST_" + ID->getObjCRuntimeNameAsString(),
-        ID, ID->getClassInterface(), ObjCTypes, true));
-  } else {
-    values.add(EmitIvarList(ID));
-    values.add(BuildWeakIvarLayout(ID, beginInstance, endInstance, hasMRCWeak));
-    values.add(EmitPropertyList(
-        "\01l_OBJC_$_PROP_LIST_" + ID->getObjCRuntimeNameAsString(),
-        ID, ID->getClassInterface(), ObjCTypes, false));
-  }
-
-  llvm::SmallString<64> roLabel;
-  llvm::raw_svector_ostream(roLabel)
-      << ((flags & NonFragileABI_Class_Meta) ? "\01l_OBJC_METACLASS_RO_$_"
-                                             : "\01l_OBJC_CLASS_RO_$_")
-      << ClassName;
-
-  llvm::GlobalVariable *CLASS_RO_GV =
-    values.finishAndCreateGlobal(roLabel, CGM.getPointerAlign(),
-                                 /*constant*/ false,
-                                 llvm::GlobalValue::PrivateLinkage);
-  if (CGM.getTriple().isOSBinFormatMachO())
-    CLASS_RO_GV->setSection("__DATA, __objc_const");
-  return CLASS_RO_GV;
-}
-
-/// Build the metaclass object for a class.
-///
-/// struct _class_t {
-///   struct _class_t *isa;
-///   struct _class_t * const superclass;
-///   void *cache;
-///   IMP *vtable;
-///   struct class_ro_t *ro;
-/// }
-///
-llvm::GlobalVariable *
-CGObjCNonFragileABIMac::BuildClassObject(const ObjCInterfaceDecl *CI,
-                                         bool isMetaclass,
-                                         llvm::Constant *IsAGV,
-                                         llvm::Constant *SuperClassGV,
-                                         llvm::Constant *ClassRoGV,
-                                         bool HiddenVisibility) {
-  ConstantInitBuilder builder(CGM);
-  auto values = builder.beginStruct(ObjCTypes.ClassnfABITy);
-  values.add(IsAGV);
-  if (SuperClassGV) {
-    values.add(SuperClassGV);
-  } else {
-    values.addNullPointer(ObjCTypes.ClassnfABIPtrTy);
-  }
-  values.add(ObjCEmptyCacheVar);
-  values.add(ObjCEmptyVtableVar);
-  values.add(ClassRoGV);
-
-  llvm::GlobalVariable *GV =
-    cast<llvm::GlobalVariable>(GetClassGlobal(CI, isMetaclass, ForDefinition));
-  values.finishAndSetAsInitializer(GV);
-
-  if (CGM.getTriple().isOSBinFormatMachO())
-    GV->setSection("__DATA, __objc_data");
-  GV->setAlignment(
-      CGM.getDataLayout().getABITypeAlignment(ObjCTypes.ClassnfABITy));
-  if (!CGM.getTriple().isOSBinFormatCOFF())
-    if (HiddenVisibility)
-      GV->setVisibility(llvm::GlobalValue::HiddenVisibility);
-  return GV;
-}
-
-bool
-CGObjCNonFragileABIMac::ImplementationIsNonLazy(const ObjCImplDecl *OD) const {
-  return OD->getClassMethod(GetNullarySelector("load")) != nullptr;
-}
-
-void CGObjCNonFragileABIMac::GetClassSizeInfo(const ObjCImplementationDecl *OID,
-                                              uint32_t &InstanceStart,
-                                              uint32_t &InstanceSize) {
-  const ASTRecordLayout &RL =
-    CGM.getContext().getASTObjCImplementationLayout(OID);
-
-  // InstanceSize is really instance end.
-  InstanceSize = RL.getDataSize().getQuantity();
-
-  // If there are no fields, the start is the same as the end.
-  if (!RL.getFieldCount())
-    InstanceStart = InstanceSize;
-  else
-    InstanceStart = RL.getFieldOffset(0) / CGM.getContext().getCharWidth();
-}
-
-static llvm::GlobalValue::DLLStorageClassTypes getStorage(CodeGenModule &CGM,
-                                                          StringRef Name) {
-  IdentifierInfo &II = CGM.getContext().Idents.get(Name);
-  TranslationUnitDecl *TUDecl = CGM.getContext().getTranslationUnitDecl();
-  DeclContext *DC = TranslationUnitDecl::castToDeclContext(TUDecl);
-
-  const VarDecl *VD = nullptr;
-  for (const auto &Result : DC->lookup(&II))
-    if ((VD = dyn_cast<VarDecl>(Result)))
-      break;
-
-  if (!VD)
-    return llvm::GlobalValue::DLLImportStorageClass;
-  if (VD->hasAttr<DLLExportAttr>())
-    return llvm::GlobalValue::DLLExportStorageClass;
-  if (VD->hasAttr<DLLImportAttr>())
-    return llvm::GlobalValue::DLLImportStorageClass;
-  return llvm::GlobalValue::DefaultStorageClass;
-}
-
-void CGObjCNonFragileABIMac::GenerateClass(const ObjCImplementationDecl *ID) {
-  if (!ObjCEmptyCacheVar) {
-    ObjCEmptyCacheVar =
-        new llvm::GlobalVariable(CGM.getModule(), ObjCTypes.CacheTy, false,
-                                 llvm::GlobalValue::ExternalLinkage, nullptr,
-                                 "_objc_empty_cache");
-    if (CGM.getTriple().isOSBinFormatCOFF())
-      ObjCEmptyCacheVar->setDLLStorageClass(getStorage(CGM, "_objc_empty_cache"));
-
-    // Only OS X with deployment version <10.9 use the empty vtable symbol
-    const llvm::Triple &Triple = CGM.getTarget().getTriple();
-    if (Triple.isMacOSX() && Triple.isMacOSXVersionLT(10, 9))
-      ObjCEmptyVtableVar =
-          new llvm::GlobalVariable(CGM.getModule(), ObjCTypes.ImpnfABITy, false,
-                                   llvm::GlobalValue::ExternalLinkage, nullptr,
-                                   "_objc_empty_vtable");
-    else
-      ObjCEmptyVtableVar =
-        llvm::ConstantPointerNull::get(ObjCTypes.ImpnfABITy->getPointerTo());
-  }
-
-  // FIXME: Is this correct (that meta class size is never computed)?
-  uint32_t InstanceStart =
-    CGM.getDataLayout().getTypeAllocSize(ObjCTypes.ClassnfABITy);
-  uint32_t InstanceSize = InstanceStart;
-  uint32_t flags = NonFragileABI_Class_Meta;
-
-  llvm::Constant *SuperClassGV, *IsAGV;
-
-  const auto *CI = ID->getClassInterface();
-  assert(CI && "CGObjCNonFragileABIMac::GenerateClass - class is 0");
-
-  // Build the flags for the metaclass.
-  bool classIsHidden = (CGM.getTriple().isOSBinFormatCOFF())
-                           ? !CI->hasAttr<DLLExportAttr>()
-                           : CI->getVisibility() == HiddenVisibility;
-  if (classIsHidden)
-    flags |= NonFragileABI_Class_Hidden;
-
-  // FIXME: why is this flag set on the metaclass?
-  // ObjC metaclasses have no fields and don't really get constructed.
-  if (ID->hasNonZeroConstructors() || ID->hasDestructors()) {
-    flags |= NonFragileABI_Class_HasCXXStructors;
-    if (!ID->hasNonZeroConstructors())
-      flags |= NonFragileABI_Class_HasCXXDestructorOnly;
-  }
-
-  if (!CI->getSuperClass()) {
-    // class is root
-    flags |= NonFragileABI_Class_Root;
-
-    SuperClassGV = GetClassGlobal(CI, /*metaclass*/ false, NotForDefinition);
-    IsAGV = GetClassGlobal(CI, /*metaclass*/ true, NotForDefinition);
-  } else {
-    // Has a root. Current class is not a root.
-    const ObjCInterfaceDecl *Root = ID->getClassInterface();
-    while (const ObjCInterfaceDecl *Super = Root->getSuperClass())
-      Root = Super;
-
-    const auto *Super = CI->getSuperClass();
-    IsAGV = GetClassGlobal(Root, /*metaclass*/ true, NotForDefinition);
-    SuperClassGV = GetClassGlobal(Super, /*metaclass*/ true, NotForDefinition);
-  }
-
-  llvm::GlobalVariable *CLASS_RO_GV =
-      BuildClassRoTInitializer(flags, InstanceStart, InstanceSize, ID);
-
-  llvm::GlobalVariable *MetaTClass =
-    BuildClassObject(CI, /*metaclass*/ true,
-                     IsAGV, SuperClassGV, CLASS_RO_GV, classIsHidden);
-  CGM.setGVProperties(MetaTClass, CI);
-  DefinedMetaClasses.push_back(MetaTClass);
-
-  // Metadata for the class
-  flags = 0;
-  if (classIsHidden)
-    flags |= NonFragileABI_Class_Hidden;
-
-  if (ID->hasNonZeroConstructors() || ID->hasDestructors()) {
-    flags |= NonFragileABI_Class_HasCXXStructors;
-
-    // Set a flag to enable a runtime optimization when a class has
-    // fields that require destruction but which don't require
-    // anything except zero-initialization during construction.  This
-    // is most notably true of __strong and __weak types, but you can
-    // also imagine there being C++ types with non-trivial default
-    // constructors that merely set all fields to null.
-    if (!ID->hasNonZeroConstructors())
-      flags |= NonFragileABI_Class_HasCXXDestructorOnly;
-  }
-
-  if (hasObjCExceptionAttribute(CGM.getContext(), CI))
-    flags |= NonFragileABI_Class_Exception;
-
-  if (!CI->getSuperClass()) {
-    flags |= NonFragileABI_Class_Root;
-    SuperClassGV = nullptr;
-  } else {
-    // Has a root. Current class is not a root.
-    const auto *Super = CI->getSuperClass();
-    SuperClassGV = GetClassGlobal(Super, /*metaclass*/ false, NotForDefinition);
-  }
-
-  GetClassSizeInfo(ID, InstanceStart, InstanceSize);
-  CLASS_RO_GV =
-      BuildClassRoTInitializer(flags, InstanceStart, InstanceSize, ID);
-
-  llvm::GlobalVariable *ClassMD =
-    BuildClassObject(CI, /*metaclass*/ false,
-                     MetaTClass, SuperClassGV, CLASS_RO_GV, classIsHidden);
-  CGM.setGVProperties(ClassMD, CI);
-  DefinedClasses.push_back(ClassMD);
-  ImplementedClasses.push_back(CI);
-
-  // Determine if this class is also "non-lazy".
-  if (ImplementationIsNonLazy(ID))
-    DefinedNonLazyClasses.push_back(ClassMD);
-
-  // Force the definition of the EHType if necessary.
-  if (flags & NonFragileABI_Class_Exception)
-    (void) GetInterfaceEHType(CI, ForDefinition);
-  // Make sure method definition entries are all clear for next implementation.
-  MethodDefinitions.clear();
-}
-
-/// GenerateProtocolRef - This routine is called to generate code for
-/// a protocol reference expression; as in:
-/// @code
-///   @protocol(Proto1);
-/// @endcode
-/// It generates a weak reference to l_OBJC_PROTOCOL_REFERENCE_$_Proto1
-/// which will hold address of the protocol meta-data.
-///
-llvm::Value *CGObjCNonFragileABIMac::GenerateProtocolRef(CodeGenFunction &CGF,
-                                                         const ObjCProtocolDecl *PD) {
-
-  // This routine is called for @protocol only. So, we must build definition
-  // of protocol's meta-data (not a reference to it!)
-  //
-  llvm::Constant *Init =
-    llvm::ConstantExpr::getBitCast(GetOrEmitProtocol(PD),
-                                   ObjCTypes.getExternalProtocolPtrTy());
-
-  std::string ProtocolName("\01l_OBJC_PROTOCOL_REFERENCE_$_");
-  ProtocolName += PD->getObjCRuntimeNameAsString();
-
-  CharUnits Align = CGF.getPointerAlign();
-
-  llvm::GlobalVariable *PTGV = CGM.getModule().getGlobalVariable(ProtocolName);
-  if (PTGV)
-    return CGF.Builder.CreateAlignedLoad(PTGV, Align);
-  PTGV = new llvm::GlobalVariable(CGM.getModule(), Init->getType(), false,
-                                  llvm::GlobalValue::WeakAnyLinkage, Init,
-                                  ProtocolName);
-  PTGV->setSection(GetSectionName("__objc_protorefs",
-                                  "coalesced,no_dead_strip"));
-  PTGV->setVisibility(llvm::GlobalValue::HiddenVisibility);
-  PTGV->setAlignment(Align.getQuantity());
-  if (!CGM.getTriple().isOSBinFormatMachO())
-    PTGV->setComdat(CGM.getModule().getOrInsertComdat(ProtocolName));
-  CGM.addUsedGlobal(PTGV);
-  return CGF.Builder.CreateAlignedLoad(PTGV, Align);
-}
-
-/// GenerateCategory - Build metadata for a category implementation.
-/// struct _category_t {
-///   const char * const name;
-///   struct _class_t *const cls;
-///   const struct _method_list_t * const instance_methods;
-///   const struct _method_list_t * const class_methods;
-///   const struct _protocol_list_t * const protocols;
-///   const struct _prop_list_t * const properties;
-///   const struct _prop_list_t * const class_properties;
-///   const uint32_t size;
-/// }
-///
-void CGObjCNonFragileABIMac::GenerateCategory(const ObjCCategoryImplDecl *OCD) {
-  const ObjCInterfaceDecl *Interface = OCD->getClassInterface();
-  const char *Prefix = "\01l_OBJC_$_CATEGORY_";
-
-  llvm::SmallString<64> ExtCatName(Prefix);
-  ExtCatName += Interface->getObjCRuntimeNameAsString();
-  ExtCatName += "_$_";
-  ExtCatName += OCD->getNameAsString();
-
-  ConstantInitBuilder builder(CGM);
-  auto values = builder.beginStruct(ObjCTypes.CategorynfABITy);
-  values.add(GetClassName(OCD->getIdentifier()->getName()));
-  // meta-class entry symbol
-  values.add(GetClassGlobal(Interface, /*metaclass*/ false, NotForDefinition));
-  std::string listName =
-      (Interface->getObjCRuntimeNameAsString() + "_$_" + OCD->getName()).str();
-
-  SmallVector<const ObjCMethodDecl *, 16> instanceMethods;
-  SmallVector<const ObjCMethodDecl *, 8> classMethods;
-  for (const auto *MD : OCD->methods()) {
-    if (MD->isInstanceMethod()) {
-      instanceMethods.push_back(MD);
-    } else {
-      classMethods.push_back(MD);
-    }
-  }
-
-  values.add(emitMethodList(listName, MethodListType::CategoryInstanceMethods,
-                            instanceMethods));
-  values.add(emitMethodList(listName, MethodListType::CategoryClassMethods,
-                            classMethods));
-
-  const ObjCCategoryDecl *Category =
-    Interface->FindCategoryDeclaration(OCD->getIdentifier());
-  if (Category) {
-    SmallString<256> ExtName;
-    llvm::raw_svector_ostream(ExtName) << Interface->getObjCRuntimeNameAsString() << "_$_"
-                                       << OCD->getName();
-    values.add(EmitProtocolList("\01l_OBJC_CATEGORY_PROTOCOLS_$_"
-                                   + Interface->getObjCRuntimeNameAsString() + "_$_"
-                                   + Category->getName(),
-                                Category->protocol_begin(),
-                                Category->protocol_end()));
-    values.add(EmitPropertyList("\01l_OBJC_$_PROP_LIST_" + ExtName.str(),
-                                OCD, Category, ObjCTypes, false));
-    values.add(EmitPropertyList("\01l_OBJC_$_CLASS_PROP_LIST_" + ExtName.str(),
-                                OCD, Category, ObjCTypes, true));
-  } else {
-    values.addNullPointer(ObjCTypes.ProtocolListnfABIPtrTy);
-    values.addNullPointer(ObjCTypes.PropertyListPtrTy);
-    values.addNullPointer(ObjCTypes.PropertyListPtrTy);
-  }
-
-  unsigned Size = CGM.getDataLayout().getTypeAllocSize(ObjCTypes.CategorynfABITy);
-  values.addInt(ObjCTypes.IntTy, Size);
-
-  llvm::GlobalVariable *GCATV =
-    values.finishAndCreateGlobal(ExtCatName.str(), CGM.getPointerAlign(),
-                                 /*constant*/ false,
-                                 llvm::GlobalValue::PrivateLinkage);
-  if (CGM.getTriple().isOSBinFormatMachO())
-    GCATV->setSection("__DATA, __objc_const");
-  CGM.addCompilerUsedGlobal(GCATV);
-  DefinedCategories.push_back(GCATV);
-
-  // Determine if this category is also "non-lazy".
-  if (ImplementationIsNonLazy(OCD))
-    DefinedNonLazyCategories.push_back(GCATV);
-  // method definition entries must be clear for next implementation.
-  MethodDefinitions.clear();
-}
-
-/// emitMethodConstant - Return a struct objc_method constant.  If
-/// forProtocol is true, the implementation will be null; otherwise,
-/// the method must have a definition registered with the runtime.
-///
-/// struct _objc_method {
-///   SEL _cmd;
-///   char *method_type;
-///   char *_imp;
-/// }
-void CGObjCNonFragileABIMac::emitMethodConstant(ConstantArrayBuilder &builder,
-                                                const ObjCMethodDecl *MD,
-                                                bool forProtocol) {
-  auto method = builder.beginStruct(ObjCTypes.MethodTy);
-  method.addBitCast(GetMethodVarName(MD->getSelector()),
-                    ObjCTypes.SelectorPtrTy);
-  method.add(GetMethodVarType(MD));
-
-  if (forProtocol) {
-    // Protocol methods have no implementation. So, this entry is always NULL.
-    method.addNullPointer(ObjCTypes.Int8PtrTy);
-  } else {
-    llvm::Function *fn = GetMethodDefinition(MD);
-    assert(fn && "no definition for method?");
-    method.addBitCast(fn, ObjCTypes.Int8PtrTy);
-  }
-
-  method.finishAndAddTo(builder);
-}
-
-/// Build meta-data for method declarations.
-///
-/// struct _method_list_t {
-///   uint32_t entsize;  // sizeof(struct _objc_method)
-///   uint32_t method_count;
-///   struct _objc_method method_list[method_count];
-/// }
-///
-llvm::Constant *
-CGObjCNonFragileABIMac::emitMethodList(Twine name, MethodListType kind,
-                              ArrayRef<const ObjCMethodDecl *> methods) {
-  // Return null for empty list.
-  if (methods.empty())
-    return llvm::Constant::getNullValue(ObjCTypes.MethodListnfABIPtrTy);
-
-  StringRef prefix;
-  bool forProtocol;
-  switch (kind) {
-  case MethodListType::CategoryInstanceMethods:
-    prefix = "\01l_OBJC_$_CATEGORY_INSTANCE_METHODS_";
-    forProtocol = false;
-    break;
-  case MethodListType::CategoryClassMethods:
-    prefix = "\01l_OBJC_$_CATEGORY_CLASS_METHODS_";
-    forProtocol = false;
-    break;
-  case MethodListType::InstanceMethods:
-    prefix = "\01l_OBJC_$_INSTANCE_METHODS_";
-    forProtocol = false;
-    break;
-  case MethodListType::ClassMethods:
-    prefix = "\01l_OBJC_$_CLASS_METHODS_";
-    forProtocol = false;
-    break;
-
-  case MethodListType::ProtocolInstanceMethods:
-    prefix = "\01l_OBJC_$_PROTOCOL_INSTANCE_METHODS_";
-    forProtocol = true;
-    break;
-  case MethodListType::ProtocolClassMethods:
-    prefix = "\01l_OBJC_$_PROTOCOL_CLASS_METHODS_";
-    forProtocol = true;
-    break;
-  case MethodListType::OptionalProtocolInstanceMethods:
-    prefix = "\01l_OBJC_$_PROTOCOL_INSTANCE_METHODS_OPT_";
-    forProtocol = true;
-    break;
-  case MethodListType::OptionalProtocolClassMethods:
-    prefix = "\01l_OBJC_$_PROTOCOL_CLASS_METHODS_OPT_";
-    forProtocol = true;
-    break;
-  }
-
-  ConstantInitBuilder builder(CGM);
-  auto values = builder.beginStruct();
-
-  // sizeof(struct _objc_method)
-  unsigned Size = CGM.getDataLayout().getTypeAllocSize(ObjCTypes.MethodTy);
-  values.addInt(ObjCTypes.IntTy, Size);
-  // method_count
-  values.addInt(ObjCTypes.IntTy, methods.size());
-  auto methodArray = values.beginArray(ObjCTypes.MethodTy);
-  for (auto MD : methods) {
-    emitMethodConstant(methodArray, MD, forProtocol);
-  }
-  methodArray.finishAndAddTo(values);
-
-  auto *GV = values.finishAndCreateGlobal(prefix + name, CGM.getPointerAlign(),
-                                          /*constant*/ false,
-                                          llvm::GlobalValue::PrivateLinkage);
-  if (CGM.getTriple().isOSBinFormatMachO())
-    GV->setSection("__DATA, __objc_const");
-  CGM.addCompilerUsedGlobal(GV);
-  return llvm::ConstantExpr::getBitCast(GV, ObjCTypes.MethodListnfABIPtrTy);
-}
-
-/// ObjCIvarOffsetVariable - Returns the ivar offset variable for
-/// the given ivar.
-llvm::GlobalVariable *
-CGObjCNonFragileABIMac::ObjCIvarOffsetVariable(const ObjCInterfaceDecl *ID,
-                                               const ObjCIvarDecl *Ivar) {
-  const ObjCInterfaceDecl *Container = Ivar->getContainingInterface();
-  llvm::SmallString<64> Name("OBJC_IVAR_$_");
-  Name += Container->getObjCRuntimeNameAsString();
-  Name += ".";
-  Name += Ivar->getName();
-  llvm::GlobalVariable *IvarOffsetGV = CGM.getModule().getGlobalVariable(Name);
-  if (!IvarOffsetGV) {
-    IvarOffsetGV =
-        new llvm::GlobalVariable(CGM.getModule(), ObjCTypes.IvarOffsetVarTy,
-                                 false, llvm::GlobalValue::ExternalLinkage,
-                                 nullptr, Name.str());
-    if (CGM.getTriple().isOSBinFormatCOFF()) {
-      bool IsPrivateOrPackage =
-          Ivar->getAccessControl() == ObjCIvarDecl::Private ||
-          Ivar->getAccessControl() == ObjCIvarDecl::Package;
-
-      const ObjCInterfaceDecl *ContainingID = Ivar->getContainingInterface();
-
-      if (ContainingID->hasAttr<DLLImportAttr>())
-        IvarOffsetGV
-            ->setDLLStorageClass(llvm::GlobalValue::DLLImportStorageClass);
-      else if (ContainingID->hasAttr<DLLExportAttr>() && !IsPrivateOrPackage)
-        IvarOffsetGV
-            ->setDLLStorageClass(llvm::GlobalValue::DLLExportStorageClass);
-    }
-  }
-  return IvarOffsetGV;
-}
-
-llvm::Constant *
-CGObjCNonFragileABIMac::EmitIvarOffsetVar(const ObjCInterfaceDecl *ID,
-                                          const ObjCIvarDecl *Ivar,
-                                          unsigned long int Offset) {
-  llvm::GlobalVariable *IvarOffsetGV = ObjCIvarOffsetVariable(ID, Ivar);
-  IvarOffsetGV->setInitializer(
-      llvm::ConstantInt::get(ObjCTypes.IvarOffsetVarTy, Offset));
-  IvarOffsetGV->setAlignment(
-      CGM.getDataLayout().getABITypeAlignment(ObjCTypes.IvarOffsetVarTy));
-
-  if (!CGM.getTriple().isOSBinFormatCOFF()) {
-    // FIXME: This matches gcc, but shouldn't the visibility be set on the use
-    // as well (i.e., in ObjCIvarOffsetVariable).
-    if (Ivar->getAccessControl() == ObjCIvarDecl::Private ||
-        Ivar->getAccessControl() == ObjCIvarDecl::Package ||
-        ID->getVisibility() == HiddenVisibility)
-      IvarOffsetGV->setVisibility(llvm::GlobalValue::HiddenVisibility);
-    else
-      IvarOffsetGV->setVisibility(llvm::GlobalValue::DefaultVisibility);
-  }
-
-  if (CGM.getTriple().isOSBinFormatMachO())
-    IvarOffsetGV->setSection("__DATA, __objc_ivar");
-  return IvarOffsetGV;
-}
-
-/// EmitIvarList - Emit the ivar list for the given
-/// implementation. The return value has type
-/// IvarListnfABIPtrTy.
-///  struct _ivar_t {
-///   unsigned [long] int *offset;  // pointer to ivar offset location
-///   char *name;
-///   char *type;
-///   uint32_t alignment;
-///   uint32_t size;
-/// }
-/// struct _ivar_list_t {
-///   uint32 entsize;  // sizeof(struct _ivar_t)
-///   uint32 count;
-///   struct _iver_t list[count];
-/// }
-///
-
-llvm::Constant *CGObjCNonFragileABIMac::EmitIvarList(
-  const ObjCImplementationDecl *ID) {
-
-  ConstantInitBuilder builder(CGM);
-  auto ivarList = builder.beginStruct();
-  ivarList.addInt(ObjCTypes.IntTy,
-                  CGM.getDataLayout().getTypeAllocSize(ObjCTypes.IvarnfABITy));
-  auto ivarCountSlot = ivarList.addPlaceholder();
-  auto ivars = ivarList.beginArray(ObjCTypes.IvarnfABITy);
-
-  const ObjCInterfaceDecl *OID = ID->getClassInterface();
-  assert(OID && "CGObjCNonFragileABIMac::EmitIvarList - null interface");
-
-  // FIXME. Consolidate this with similar code in GenerateClass.
-
-  for (const ObjCIvarDecl *IVD = OID->all_declared_ivar_begin();
-       IVD; IVD = IVD->getNextIvar()) {
-    // Ignore unnamed bit-fields.
-    if (!IVD->getDeclName())
-      continue;
-
-    auto ivar = ivars.beginStruct(ObjCTypes.IvarnfABITy);
-    ivar.add(EmitIvarOffsetVar(ID->getClassInterface(), IVD,
-                               ComputeIvarBaseOffset(CGM, ID, IVD)));
-    ivar.add(GetMethodVarName(IVD->getIdentifier()));
-    ivar.add(GetMethodVarType(IVD));
-    llvm::Type *FieldTy =
-      CGM.getTypes().ConvertTypeForMem(IVD->getType());
-    unsigned Size = CGM.getDataLayout().getTypeAllocSize(FieldTy);
-    unsigned Align = CGM.getContext().getPreferredTypeAlign(
-      IVD->getType().getTypePtr()) >> 3;
-    Align = llvm::Log2_32(Align);
-    ivar.addInt(ObjCTypes.IntTy, Align);
-    // NOTE. Size of a bitfield does not match gcc's, because of the
-    // way bitfields are treated special in each. But I am told that
-    // 'size' for bitfield ivars is ignored by the runtime so it does
-    // not matter.  If it matters, there is enough info to get the
-    // bitfield right!
-    ivar.addInt(ObjCTypes.IntTy, Size);
-    ivar.finishAndAddTo(ivars);
-  }
-  // Return null for empty list.
-  if (ivars.empty()) {
-    ivars.abandon();
-    ivarList.abandon();
-    return llvm::Constant::getNullValue(ObjCTypes.IvarListnfABIPtrTy);
-  }
-
-  auto ivarCount = ivars.size();
-  ivars.finishAndAddTo(ivarList);
-  ivarList.fillPlaceholderWithInt(ivarCountSlot, ObjCTypes.IntTy, ivarCount);
-
-  const char *Prefix = "\01l_OBJC_$_INSTANCE_VARIABLES_";
-  llvm::GlobalVariable *GV =
-    ivarList.finishAndCreateGlobal(Prefix + OID->getObjCRuntimeNameAsString(),
-                                   CGM.getPointerAlign(), /*constant*/ false,
-                                   llvm::GlobalValue::PrivateLinkage);
-  if (CGM.getTriple().isOSBinFormatMachO())
-    GV->setSection("__DATA, __objc_const");
-  CGM.addCompilerUsedGlobal(GV);
-  return llvm::ConstantExpr::getBitCast(GV, ObjCTypes.IvarListnfABIPtrTy);
-}
-
-llvm::Constant *CGObjCNonFragileABIMac::GetOrEmitProtocolRef(
-  const ObjCProtocolDecl *PD) {
-  llvm::GlobalVariable *&Entry = Protocols[PD->getIdentifier()];
-
-  if (!Entry) {
-    // We use the initializer as a marker of whether this is a forward
-    // reference or not. At module finalization we add the empty
-    // contents for protocols which were referenced but never defined.
-    llvm::SmallString<64> Protocol;
-    llvm::raw_svector_ostream(Protocol) << "\01l_OBJC_PROTOCOL_$_"
-                                        << PD->getObjCRuntimeNameAsString();
-
-    Entry = new llvm::GlobalVariable(CGM.getModule(), ObjCTypes.ProtocolnfABITy,
-                                     false, llvm::GlobalValue::ExternalLinkage,
-                                     nullptr, Protocol);
-    if (!CGM.getTriple().isOSBinFormatMachO())
-      Entry->setComdat(CGM.getModule().getOrInsertComdat(Protocol));
-  }
-
-  return Entry;
-}
-
-/// GetOrEmitProtocol - Generate the protocol meta-data:
-/// @code
-/// struct _protocol_t {
-///   id isa;  // NULL
-///   const char * const protocol_name;
-///   const struct _protocol_list_t * protocol_list; // super protocols
-///   const struct method_list_t * const instance_methods;
-///   const struct method_list_t * const class_methods;
-///   const struct method_list_t *optionalInstanceMethods;
-///   const struct method_list_t *optionalClassMethods;
-///   const struct _prop_list_t * properties;
-///   const uint32_t size;  // sizeof(struct _protocol_t)
-///   const uint32_t flags;  // = 0
-///   const char ** extendedMethodTypes;
-///   const char *demangledName;
-///   const struct _prop_list_t * class_properties;
-/// }
-/// @endcode
-///
-
-llvm::Constant *CGObjCNonFragileABIMac::GetOrEmitProtocol(
-  const ObjCProtocolDecl *PD) {
-  llvm::GlobalVariable *Entry = Protocols[PD->getIdentifier()];
-
-  // Early exit if a defining object has already been generated.
-  if (Entry && Entry->hasInitializer())
-    return Entry;
-
-  // Use the protocol definition, if there is one.
-  assert(PD->hasDefinition() &&
-         "emitting protocol metadata without definition");
-  PD = PD->getDefinition();
-
-  auto methodLists = ProtocolMethodLists::get(PD);
-
-  ConstantInitBuilder builder(CGM);
-  auto values = builder.beginStruct(ObjCTypes.ProtocolnfABITy);
-
-  // isa is NULL
-  values.addNullPointer(ObjCTypes.ObjectPtrTy);
-  values.add(GetClassName(PD->getObjCRuntimeNameAsString()));
-  values.add(EmitProtocolList("\01l_OBJC_$_PROTOCOL_REFS_"
-                                + PD->getObjCRuntimeNameAsString(),
-                               PD->protocol_begin(),
-                               PD->protocol_end()));
-  values.add(methodLists.emitMethodList(this, PD,
-                                 ProtocolMethodLists::RequiredInstanceMethods));
-  values.add(methodLists.emitMethodList(this, PD,
-                                 ProtocolMethodLists::RequiredClassMethods));
-  values.add(methodLists.emitMethodList(this, PD,
-                                 ProtocolMethodLists::OptionalInstanceMethods));
-  values.add(methodLists.emitMethodList(this, PD,
-                                 ProtocolMethodLists::OptionalClassMethods));
-  values.add(EmitPropertyList(
-               "\01l_OBJC_$_PROP_LIST_" + PD->getObjCRuntimeNameAsString(),
-               nullptr, PD, ObjCTypes, false));
-  uint32_t Size =
-    CGM.getDataLayout().getTypeAllocSize(ObjCTypes.ProtocolnfABITy);
-  values.addInt(ObjCTypes.IntTy, Size);
-  values.addInt(ObjCTypes.IntTy, 0);
-  values.add(EmitProtocolMethodTypes("\01l_OBJC_$_PROTOCOL_METHOD_TYPES_"
-                                       + PD->getObjCRuntimeNameAsString(),
-                                     methodLists.emitExtendedTypesArray(this),
-                                     ObjCTypes));
-
-  // const char *demangledName;
-  values.addNullPointer(ObjCTypes.Int8PtrTy);
-
-  values.add(EmitPropertyList(
-      "\01l_OBJC_$_CLASS_PROP_LIST_" + PD->getObjCRuntimeNameAsString(),
-      nullptr, PD, ObjCTypes, true));
-
-  if (Entry) {
-    // Already created, fix the linkage and update the initializer.
-    Entry->setLinkage(llvm::GlobalValue::WeakAnyLinkage);
-    values.finishAndSetAsInitializer(Entry);
-  } else {
-    llvm::SmallString<64> symbolName;
-    llvm::raw_svector_ostream(symbolName)
-      << "\01l_OBJC_PROTOCOL_$_" << PD->getObjCRuntimeNameAsString();
-
-    Entry = values.finishAndCreateGlobal(symbolName, CGM.getPointerAlign(),
-                                         /*constant*/ false,
-                                         llvm::GlobalValue::WeakAnyLinkage);
-    if (!CGM.getTriple().isOSBinFormatMachO())
-      Entry->setComdat(CGM.getModule().getOrInsertComdat(symbolName));
-
-    Protocols[PD->getIdentifier()] = Entry;
-  }
-  Entry->setVisibility(llvm::GlobalValue::HiddenVisibility);
-  CGM.addUsedGlobal(Entry);
-
-  // Use this protocol meta-data to build protocol list table in section
-  // __DATA, __objc_protolist
-  llvm::SmallString<64> ProtocolRef;
-  llvm::raw_svector_ostream(ProtocolRef) << "\01l_OBJC_LABEL_PROTOCOL_$_"
-                                         << PD->getObjCRuntimeNameAsString();
-
-  llvm::GlobalVariable *PTGV =
-    new llvm::GlobalVariable(CGM.getModule(), ObjCTypes.ProtocolnfABIPtrTy,
-                             false, llvm::GlobalValue::WeakAnyLinkage, Entry,
-                             ProtocolRef);
-  if (!CGM.getTriple().isOSBinFormatMachO())
-    PTGV->setComdat(CGM.getModule().getOrInsertComdat(ProtocolRef));
-  PTGV->setAlignment(
-    CGM.getDataLayout().getABITypeAlignment(ObjCTypes.ProtocolnfABIPtrTy));
-  PTGV->setSection(GetSectionName("__objc_protolist",
-                                  "coalesced,no_dead_strip"));
-  PTGV->setVisibility(llvm::GlobalValue::HiddenVisibility);
-  CGM.addUsedGlobal(PTGV);
-  return Entry;
-}
-
-/// EmitProtocolList - Generate protocol list meta-data:
-/// @code
-/// struct _protocol_list_t {
-///   long protocol_count;   // Note, this is 32/64 bit
-///   struct _protocol_t[protocol_count];
-/// }
-/// @endcode
-///
-llvm::Constant *
-CGObjCNonFragileABIMac::EmitProtocolList(Twine Name,
-                                      ObjCProtocolDecl::protocol_iterator begin,
-                                      ObjCProtocolDecl::protocol_iterator end) {
-  SmallVector<llvm::Constant *, 16> ProtocolRefs;
-
-  // Just return null for empty protocol lists
-  if (begin == end)
-    return llvm::Constant::getNullValue(ObjCTypes.ProtocolListnfABIPtrTy);
-
-  // FIXME: We shouldn't need to do this lookup here, should we?
-  SmallString<256> TmpName;
-  Name.toVector(TmpName);
-  llvm::GlobalVariable *GV =
-    CGM.getModule().getGlobalVariable(TmpName.str(), true);
-  if (GV)
-    return llvm::ConstantExpr::getBitCast(GV, ObjCTypes.ProtocolListnfABIPtrTy);
-
-  ConstantInitBuilder builder(CGM);
-  auto values = builder.beginStruct();
-  auto countSlot = values.addPlaceholder();
-
-  // A null-terminated array of protocols.
-  auto array = values.beginArray(ObjCTypes.ProtocolnfABIPtrTy);
-  for (; begin != end; ++begin)
-    array.add(GetProtocolRef(*begin));  // Implemented???
-  auto count = array.size();
-  array.addNullPointer(ObjCTypes.ProtocolnfABIPtrTy);
-
-  array.finishAndAddTo(values);
-  values.fillPlaceholderWithInt(countSlot, ObjCTypes.LongTy, count);
-
-  GV = values.finishAndCreateGlobal(Name, CGM.getPointerAlign(),
-                                    /*constant*/ false,
-                                    llvm::GlobalValue::PrivateLinkage);
-  if (CGM.getTriple().isOSBinFormatMachO())
-    GV->setSection("__DATA, __objc_const");
-  CGM.addCompilerUsedGlobal(GV);
-  return llvm::ConstantExpr::getBitCast(GV,
-                                        ObjCTypes.ProtocolListnfABIPtrTy);
-}
-
-/// EmitObjCValueForIvar - Code Gen for nonfragile ivar reference.
-/// This code gen. amounts to generating code for:
-/// @code
-/// (type *)((char *)base + _OBJC_IVAR_$_.ivar;
-/// @encode
-///
-LValue CGObjCNonFragileABIMac::EmitObjCValueForIvar(
-                                               CodeGen::CodeGenFunction &CGF,
-                                               QualType ObjectTy,
-                                               llvm::Value *BaseValue,
-                                               const ObjCIvarDecl *Ivar,
-                                               unsigned CVRQualifiers) {
-  ObjCInterfaceDecl *ID = ObjectTy->getAs<ObjCObjectType>()->getInterface();
-  llvm::Value *Offset = EmitIvarOffset(CGF, ID, Ivar);
-  return EmitValueForIvarAtOffset(CGF, ID, BaseValue, Ivar, CVRQualifiers,
-                                  Offset);
-}
-
-llvm::Value *CGObjCNonFragileABIMac::EmitIvarOffset(
-  CodeGen::CodeGenFunction &CGF,
-  const ObjCInterfaceDecl *Interface,
-  const ObjCIvarDecl *Ivar) {
-  llvm::Value *IvarOffsetValue = ObjCIvarOffsetVariable(Interface, Ivar);
-  IvarOffsetValue = CGF.Builder.CreateAlignedLoad(IvarOffsetValue,
-                                                  CGF.getSizeAlign(), "ivar");
-  if (IsIvarOffsetKnownIdempotent(CGF, Ivar))
-    cast<llvm::LoadInst>(IvarOffsetValue)
-        ->setMetadata(CGM.getModule().getMDKindID("invariant.load"),
-                      llvm::MDNode::get(VMContext, None));
-
-  // This could be 32bit int or 64bit integer depending on the architecture.
-  // Cast it to 64bit integer value, if it is a 32bit integer ivar offset value
-  //  as this is what caller always expects.
-  if (ObjCTypes.IvarOffsetVarTy == ObjCTypes.IntTy)
-    IvarOffsetValue = CGF.Builder.CreateIntCast(
-        IvarOffsetValue, ObjCTypes.LongTy, true, "ivar.conv");
-  return IvarOffsetValue;
-}
-
-static void appendSelectorForMessageRefTable(std::string &buffer,
-                                             Selector selector) {
-  if (selector.isUnarySelector()) {
-    buffer += selector.getNameForSlot(0);
-    return;
-  }
-
-  for (unsigned i = 0, e = selector.getNumArgs(); i != e; ++i) {
-    buffer += selector.getNameForSlot(i);
-    buffer += '_';
-  }
-}
-
-/// Emit a "vtable" message send.  We emit a weak hidden-visibility
-/// struct, initially containing the selector pointer and a pointer to
-/// a "fixup" variant of the appropriate objc_msgSend.  To call, we
-/// load and call the function pointer, passing the address of the
-/// struct as the second parameter.  The runtime determines whether
-/// the selector is currently emitted using vtable dispatch; if so, it
-/// substitutes a stub function which simply tail-calls through the
-/// appropriate vtable slot, and if not, it substitues a stub function
-/// which tail-calls objc_msgSend.  Both stubs adjust the selector
-/// argument to correctly point to the selector.
-RValue
-CGObjCNonFragileABIMac::EmitVTableMessageSend(CodeGenFunction &CGF,
-                                              ReturnValueSlot returnSlot,
-                                              QualType resultType,
-                                              Selector selector,
-                                              llvm::Value *arg0,
-                                              QualType arg0Type,
-                                              bool isSuper,
-                                              const CallArgList &formalArgs,
-                                              const ObjCMethodDecl *method) {
-  // Compute the actual arguments.
-  CallArgList args;
-
-  // First argument: the receiver / super-call structure.
-  if (!isSuper)
-    arg0 = CGF.Builder.CreateBitCast(arg0, ObjCTypes.ObjectPtrTy);
-  args.add(RValue::get(arg0), arg0Type);
-
-  // Second argument: a pointer to the message ref structure.  Leave
-  // the actual argument value blank for now.
-  args.add(RValue::get(nullptr), ObjCTypes.MessageRefCPtrTy);
-
-  args.insert(args.end(), formalArgs.begin(), formalArgs.end());
-
-  MessageSendInfo MSI = getMessageSendInfo(method, resultType, args);
-
-  NullReturnState nullReturn;
-
-  // Find the function to call and the mangled name for the message
-  // ref structure.  Using a different mangled name wouldn't actually
-  // be a problem; it would just be a waste.
-  //
-  // The runtime currently never uses vtable dispatch for anything
-  // except normal, non-super message-sends.
-  // FIXME: don't use this for that.
-  llvm::Constant *fn = nullptr;
-  std::string messageRefName("\01l_");
-  if (CGM.ReturnSlotInterferesWithArgs(MSI.CallInfo)) {
-    if (isSuper) {
-      fn = ObjCTypes.getMessageSendSuper2StretFixupFn();
-      messageRefName += "objc_msgSendSuper2_stret_fixup";
-    } else {
-      nullReturn.init(CGF, arg0);
-      fn = ObjCTypes.getMessageSendStretFixupFn();
-      messageRefName += "objc_msgSend_stret_fixup";
-    }
-  } else if (!isSuper && CGM.ReturnTypeUsesFPRet(resultType)) {
-    fn = ObjCTypes.getMessageSendFpretFixupFn();
-    messageRefName += "objc_msgSend_fpret_fixup";
-  } else {
-    if (isSuper) {
-      fn = ObjCTypes.getMessageSendSuper2FixupFn();
-      messageRefName += "objc_msgSendSuper2_fixup";
-    } else {
-      fn = ObjCTypes.getMessageSendFixupFn();
-      messageRefName += "objc_msgSend_fixup";
-    }
-  }
-  assert(fn && "CGObjCNonFragileABIMac::EmitMessageSend");
-  messageRefName += '_';
-
-  // Append the selector name, except use underscores anywhere we
-  // would have used colons.
-  appendSelectorForMessageRefTable(messageRefName, selector);
-
-  llvm::GlobalVariable *messageRef
-    = CGM.getModule().getGlobalVariable(messageRefName);
-  if (!messageRef) {
-    // Build the message ref structure.
-    ConstantInitBuilder builder(CGM);
-    auto values = builder.beginStruct();
-    values.add(fn);
-    values.add(GetMethodVarName(selector));
-    messageRef = values.finishAndCreateGlobal(messageRefName,
-                                              CharUnits::fromQuantity(16),
-                                              /*constant*/ false,
-                                        llvm::GlobalValue::WeakAnyLinkage);
-    messageRef->setVisibility(llvm::GlobalValue::HiddenVisibility);
-    messageRef->setSection(GetSectionName("__objc_msgrefs", "coalesced"));
-  }
-
-  bool requiresnullCheck = false;
-  if (CGM.getLangOpts().ObjCAutoRefCount && method)
-    for (const auto *ParamDecl : method->parameters()) {
-      if (ParamDecl->hasAttr<NSConsumedAttr>()) {
-        if (!nullReturn.NullBB)
-          nullReturn.init(CGF, arg0);
-        requiresnullCheck = true;
-        break;
-      }
-    }
-
-  Address mref =
-    Address(CGF.Builder.CreateBitCast(messageRef, ObjCTypes.MessageRefPtrTy),
-            CGF.getPointerAlign());
-
-  // Update the message ref argument.
-  args[1].setRValue(RValue::get(mref.getPointer()));
-
-  // Load the function to call from the message ref table.
-  Address calleeAddr =
-      CGF.Builder.CreateStructGEP(mref, 0, CharUnits::Zero());
-  llvm::Value *calleePtr = CGF.Builder.CreateLoad(calleeAddr, "msgSend_fn");
-
-  calleePtr = CGF.Builder.CreateBitCast(calleePtr, MSI.MessengerType);
-  CGCallee callee(CGCalleeInfo(), calleePtr);
-
-  RValue result = CGF.EmitCall(MSI.CallInfo, callee, returnSlot, args);
-  return nullReturn.complete(CGF, returnSlot, result, resultType, formalArgs,
-                             requiresnullCheck ? method : nullptr);
-}
-
-/// Generate code for a message send expression in the nonfragile abi.
-CodeGen::RValue
-CGObjCNonFragileABIMac::GenerateMessageSend(CodeGen::CodeGenFunction &CGF,
-                                            ReturnValueSlot Return,
-                                            QualType ResultType,
-                                            Selector Sel,
-                                            llvm::Value *Receiver,
-                                            const CallArgList &CallArgs,
-                                            const ObjCInterfaceDecl *Class,
-                                            const ObjCMethodDecl *Method) {
-  return isVTableDispatchedSelector(Sel)
-    ? EmitVTableMessageSend(CGF, Return, ResultType, Sel,
-                            Receiver, CGF.getContext().getObjCIdType(),
-                            false, CallArgs, Method)
-    : EmitMessageSend(CGF, Return, ResultType,
-                      EmitSelector(CGF, Sel),
-                      Receiver, CGF.getContext().getObjCIdType(),
-                      false, CallArgs, Method, Class, ObjCTypes);
-}
-
-llvm::Constant *
-CGObjCNonFragileABIMac::GetClassGlobal(const ObjCInterfaceDecl *ID,
-                                       bool metaclass,
-                                       ForDefinition_t isForDefinition) {
-  auto prefix =
-    (metaclass ? getMetaclassSymbolPrefix() : getClassSymbolPrefix());
-  return GetClassGlobal((prefix + ID->getObjCRuntimeNameAsString()).str(),
-                        isForDefinition,
-                        ID->isWeakImported(),
-                        !isForDefinition
-                          && CGM.getTriple().isOSBinFormatCOFF()
-                          && ID->hasAttr<DLLImportAttr>());
-}
-
-llvm::Constant *
-CGObjCNonFragileABIMac::GetClassGlobal(StringRef Name,
-                                       ForDefinition_t IsForDefinition,
-                                       bool Weak, bool DLLImport) {
-  llvm::GlobalValue::LinkageTypes L =
-      Weak ? llvm::GlobalValue::ExternalWeakLinkage
-           : llvm::GlobalValue::ExternalLinkage;
-
-  llvm::GlobalVariable *GV = CGM.getModule().getGlobalVariable(Name);
-  if (!GV || GV->getType() != ObjCTypes.ClassnfABITy->getPointerTo()) {
-    auto *NewGV = new llvm::GlobalVariable(ObjCTypes.ClassnfABITy, false, L,
-                                           nullptr, Name);
-
-    if (DLLImport)
-      NewGV->setDLLStorageClass(llvm::GlobalValue::DLLImportStorageClass);
-
-    if (GV) {
-      GV->replaceAllUsesWith(
-          llvm::ConstantExpr::getBitCast(NewGV, GV->getType()));
-      GV->eraseFromParent();
-    }
-    GV = NewGV;
-    CGM.getModule().getGlobalList().push_back(GV);
-  }
-
-  assert(GV->getLinkage() == L);
-  return GV;
-}
-
-llvm::Value *
-CGObjCNonFragileABIMac::EmitClassRefFromId(CodeGenFunction &CGF,
-                                           IdentifierInfo *II,
-                                           const ObjCInterfaceDecl *ID) {
-  CharUnits Align = CGF.getPointerAlign();
-  llvm::GlobalVariable *&Entry = ClassReferences[II];
-
-  if (!Entry) {
-    llvm::Constant *ClassGV;
-    if (ID) {
-      ClassGV = GetClassGlobal(ID, /*metaclass*/ false, NotForDefinition);
-    } else {
-      ClassGV = GetClassGlobal((getClassSymbolPrefix() + II->getName()).str(),
-                               NotForDefinition);
-    }
-
-    Entry = new llvm::GlobalVariable(CGM.getModule(), ObjCTypes.ClassnfABIPtrTy,
-                                     false, llvm::GlobalValue::PrivateLinkage,
-                                     ClassGV, "OBJC_CLASSLIST_REFERENCES_$_");
-    Entry->setAlignment(Align.getQuantity());
-    Entry->setSection(GetSectionName("__objc_classrefs",
-                                     "regular,no_dead_strip"));
-    CGM.addCompilerUsedGlobal(Entry);
-  }
-  return CGF.Builder.CreateAlignedLoad(Entry, Align);
-}
-
-llvm::Value *CGObjCNonFragileABIMac::EmitClassRef(CodeGenFunction &CGF,
-                                                  const ObjCInterfaceDecl *ID) {
-  // If the class has the objc_runtime_visible attribute, we need to
-  // use the Objective-C runtime to get the class.
-  if (ID->hasAttr<ObjCRuntimeVisibleAttr>())
-    return EmitClassRefViaRuntime(CGF, ID, ObjCTypes);
-
-  return EmitClassRefFromId(CGF, ID->getIdentifier(), ID);
-}
-
-llvm::Value *CGObjCNonFragileABIMac::EmitNSAutoreleasePoolClassRef(
-                                                    CodeGenFunction &CGF) {
-  IdentifierInfo *II = &CGM.getContext().Idents.get("NSAutoreleasePool");
-  return EmitClassRefFromId(CGF, II, nullptr);
-}
-
-llvm::Value *
-CGObjCNonFragileABIMac::EmitSuperClassRef(CodeGenFunction &CGF,
-                                          const ObjCInterfaceDecl *ID) {
-  CharUnits Align = CGF.getPointerAlign();
-  llvm::GlobalVariable *&Entry = SuperClassReferences[ID->getIdentifier()];
-
-  if (!Entry) {
-    auto ClassGV = GetClassGlobal(ID, /*metaclass*/ false, NotForDefinition);
-    Entry = new llvm::GlobalVariable(CGM.getModule(), ObjCTypes.ClassnfABIPtrTy,
-                                     false, llvm::GlobalValue::PrivateLinkage,
-                                     ClassGV, "OBJC_CLASSLIST_SUP_REFS_$_");
-    Entry->setAlignment(Align.getQuantity());
-    Entry->setSection(GetSectionName("__objc_superrefs",
-                                     "regular,no_dead_strip"));
-    CGM.addCompilerUsedGlobal(Entry);
-  }
-  return CGF.Builder.CreateAlignedLoad(Entry, Align);
-}
-
-/// EmitMetaClassRef - Return a Value * of the address of _class_t
-/// meta-data
-///
-llvm::Value *CGObjCNonFragileABIMac::EmitMetaClassRef(CodeGenFunction &CGF,
-                                                      const ObjCInterfaceDecl *ID,
-                                                      bool Weak) {
-  CharUnits Align = CGF.getPointerAlign();
-  llvm::GlobalVariable * &Entry = MetaClassReferences[ID->getIdentifier()];
-  if (!Entry) {
-    auto MetaClassGV = GetClassGlobal(ID, /*metaclass*/ true, NotForDefinition);
-
-    Entry = new llvm::GlobalVariable(CGM.getModule(), ObjCTypes.ClassnfABIPtrTy,
-                                     false, llvm::GlobalValue::PrivateLinkage,
-                                     MetaClassGV, "OBJC_CLASSLIST_SUP_REFS_$_");
-    Entry->setAlignment(Align.getQuantity());
-
-    Entry->setSection(GetSectionName("__objc_superrefs",
-                                     "regular,no_dead_strip"));
-    CGM.addCompilerUsedGlobal(Entry);
-  }
-
-  return CGF.Builder.CreateAlignedLoad(Entry, Align);
-}
-
-/// GetClass - Return a reference to the class for the given interface
-/// decl.
-llvm::Value *CGObjCNonFragileABIMac::GetClass(CodeGenFunction &CGF,
-                                              const ObjCInterfaceDecl *ID) {
-  if (ID->isWeakImported()) {
-    auto ClassGV = GetClassGlobal(ID, /*metaclass*/ false, NotForDefinition);
-    (void)ClassGV;
-    assert(!isa<llvm::GlobalVariable>(ClassGV) ||
-           cast<llvm::GlobalVariable>(ClassGV)->hasExternalWeakLinkage());
-  }
-
-  return EmitClassRef(CGF, ID);
-}
-
-/// Generates a message send where the super is the receiver.  This is
-/// a message send to self with special delivery semantics indicating
-/// which class's method should be called.
-CodeGen::RValue
-CGObjCNonFragileABIMac::GenerateMessageSendSuper(CodeGen::CodeGenFunction &CGF,
-                                                 ReturnValueSlot Return,
-                                                 QualType ResultType,
-                                                 Selector Sel,
-                                                 const ObjCInterfaceDecl *Class,
-                                                 bool isCategoryImpl,
-                                                 llvm::Value *Receiver,
-                                                 bool IsClassMessage,
-                                                 const CodeGen::CallArgList &CallArgs,
-                                                 const ObjCMethodDecl *Method) {
-  // ...
-  // Create and init a super structure; this is a (receiver, class)
-  // pair we will pass to objc_msgSendSuper.
-  Address ObjCSuper =
-    CGF.CreateTempAlloca(ObjCTypes.SuperTy, CGF.getPointerAlign(),
-                         "objc_super");
-
-  llvm::Value *ReceiverAsObject =
-    CGF.Builder.CreateBitCast(Receiver, ObjCTypes.ObjectPtrTy);
-  CGF.Builder.CreateStore(
-      ReceiverAsObject,
-      CGF.Builder.CreateStructGEP(ObjCSuper, 0, CharUnits::Zero()));
-
-  // If this is a class message the metaclass is passed as the target.
-  llvm::Value *Target;
-  if (IsClassMessage)
-      Target = EmitMetaClassRef(CGF, Class, Class->isWeakImported());
-  else
-    Target = EmitSuperClassRef(CGF, Class);
-
-  // FIXME: We shouldn't need to do this cast, rectify the ASTContext and
-  // ObjCTypes types.
-  llvm::Type *ClassTy =
-    CGM.getTypes().ConvertType(CGF.getContext().getObjCClassType());
-  Target = CGF.Builder.CreateBitCast(Target, ClassTy);
-  CGF.Builder.CreateStore(
-      Target, CGF.Builder.CreateStructGEP(ObjCSuper, 1, CGF.getPointerSize()));
-
-  return (isVTableDispatchedSelector(Sel))
-    ? EmitVTableMessageSend(CGF, Return, ResultType, Sel,
-                            ObjCSuper.getPointer(), ObjCTypes.SuperPtrCTy,
-                            true, CallArgs, Method)
-    : EmitMessageSend(CGF, Return, ResultType,
-                      EmitSelector(CGF, Sel),
-                      ObjCSuper.getPointer(), ObjCTypes.SuperPtrCTy,
-                      true, CallArgs, Method, Class, ObjCTypes);
-}
-
-llvm::Value *CGObjCNonFragileABIMac::EmitSelector(CodeGenFunction &CGF,
-                                                  Selector Sel) {
-  Address Addr = EmitSelectorAddr(CGF, Sel);
-
-  llvm::LoadInst* LI = CGF.Builder.CreateLoad(Addr);
-  LI->setMetadata(CGM.getModule().getMDKindID("invariant.load"),
-                  llvm::MDNode::get(VMContext, None));
-  return LI;
-}
-
-Address CGObjCNonFragileABIMac::EmitSelectorAddr(CodeGenFunction &CGF,
-                                                 Selector Sel) {
-  llvm::GlobalVariable *&Entry = SelectorReferences[Sel];
-
-  CharUnits Align = CGF.getPointerAlign();
-  if (!Entry) {
-    llvm::Constant *Casted =
-      llvm::ConstantExpr::getBitCast(GetMethodVarName(Sel),
-                                     ObjCTypes.SelectorPtrTy);
-    Entry = new llvm::GlobalVariable(CGM.getModule(), ObjCTypes.SelectorPtrTy,
-                                     false, llvm::GlobalValue::PrivateLinkage,
-                                     Casted, "OBJC_SELECTOR_REFERENCES_");
-    Entry->setExternallyInitialized(true);
-    Entry->setSection(GetSectionName("__objc_selrefs",
-                                     "literal_pointers,no_dead_strip"));
-    Entry->setAlignment(Align.getQuantity());
-    CGM.addCompilerUsedGlobal(Entry);
-  }
-
-  return Address(Entry, Align);
-}
-
-/// EmitObjCIvarAssign - Code gen for assigning to a __strong object.
-/// objc_assign_ivar (id src, id *dst, ptrdiff_t)
-///
-void CGObjCNonFragileABIMac::EmitObjCIvarAssign(CodeGen::CodeGenFunction &CGF,
-                                                llvm::Value *src,
-                                                Address dst,
-                                                llvm::Value *ivarOffset) {
-  llvm::Type * SrcTy = src->getType();
-  if (!isa<llvm::PointerType>(SrcTy)) {
-    unsigned Size = CGM.getDataLayout().getTypeAllocSize(SrcTy);
-    assert(Size <= 8 && "does not support size > 8");
-    src = (Size == 4 ? CGF.Builder.CreateBitCast(src, ObjCTypes.IntTy)
-           : CGF.Builder.CreateBitCast(src, ObjCTypes.LongTy));
-    src = CGF.Builder.CreateIntToPtr(src, ObjCTypes.Int8PtrTy);
-  }
-  src = CGF.Builder.CreateBitCast(src, ObjCTypes.ObjectPtrTy);
-  dst = CGF.Builder.CreateBitCast(dst, ObjCTypes.PtrObjectPtrTy);
-  llvm::Value *args[] = { src, dst.getPointer(), ivarOffset };
-  CGF.EmitNounwindRuntimeCall(ObjCTypes.getGcAssignIvarFn(), args);
-}
-
-/// EmitObjCStrongCastAssign - Code gen for assigning to a __strong cast object.
-/// objc_assign_strongCast (id src, id *dst)
-///
-void CGObjCNonFragileABIMac::EmitObjCStrongCastAssign(
-  CodeGen::CodeGenFunction &CGF,
-  llvm::Value *src, Address dst) {
-  llvm::Type * SrcTy = src->getType();
-  if (!isa<llvm::PointerType>(SrcTy)) {
-    unsigned Size = CGM.getDataLayout().getTypeAllocSize(SrcTy);
-    assert(Size <= 8 && "does not support size > 8");
-    src = (Size == 4 ? CGF.Builder.CreateBitCast(src, ObjCTypes.IntTy)
-           : CGF.Builder.CreateBitCast(src, ObjCTypes.LongTy));
-    src = CGF.Builder.CreateIntToPtr(src, ObjCTypes.Int8PtrTy);
-  }
-  src = CGF.Builder.CreateBitCast(src, ObjCTypes.ObjectPtrTy);
-  dst = CGF.Builder.CreateBitCast(dst, ObjCTypes.PtrObjectPtrTy);
-  llvm::Value *args[] = { src, dst.getPointer() };
-  CGF.EmitNounwindRuntimeCall(ObjCTypes.getGcAssignStrongCastFn(),
-                              args, "weakassign");
-}
-
-void CGObjCNonFragileABIMac::EmitGCMemmoveCollectable(
-  CodeGen::CodeGenFunction &CGF,
-  Address DestPtr,
-  Address SrcPtr,
-  llvm::Value *Size) {
-  SrcPtr = CGF.Builder.CreateBitCast(SrcPtr, ObjCTypes.Int8PtrTy);
-  DestPtr = CGF.Builder.CreateBitCast(DestPtr, ObjCTypes.Int8PtrTy);
-  llvm::Value *args[] = { DestPtr.getPointer(), SrcPtr.getPointer(), Size };
-  CGF.EmitNounwindRuntimeCall(ObjCTypes.GcMemmoveCollectableFn(), args);
-}
-
-/// EmitObjCWeakRead - Code gen for loading value of a __weak
-/// object: objc_read_weak (id *src)
-///
-llvm::Value * CGObjCNonFragileABIMac::EmitObjCWeakRead(
-  CodeGen::CodeGenFunction &CGF,
-  Address AddrWeakObj) {
-  llvm::Type *DestTy = AddrWeakObj.getElementType();
-  AddrWeakObj = CGF.Builder.CreateBitCast(AddrWeakObj, ObjCTypes.PtrObjectPtrTy);
-  llvm::Value *read_weak =
-    CGF.EmitNounwindRuntimeCall(ObjCTypes.getGcReadWeakFn(),
-                                AddrWeakObj.getPointer(), "weakread");
-  read_weak = CGF.Builder.CreateBitCast(read_weak, DestTy);
-  return read_weak;
-}
-
-/// EmitObjCWeakAssign - Code gen for assigning to a __weak object.
-/// objc_assign_weak (id src, id *dst)
-///
-void CGObjCNonFragileABIMac::EmitObjCWeakAssign(CodeGen::CodeGenFunction &CGF,
-                                                llvm::Value *src, Address dst) {
-  llvm::Type * SrcTy = src->getType();
-  if (!isa<llvm::PointerType>(SrcTy)) {
-    unsigned Size = CGM.getDataLayout().getTypeAllocSize(SrcTy);
-    assert(Size <= 8 && "does not support size > 8");
-    src = (Size == 4 ? CGF.Builder.CreateBitCast(src, ObjCTypes.IntTy)
-           : CGF.Builder.CreateBitCast(src, ObjCTypes.LongTy));
-    src = CGF.Builder.CreateIntToPtr(src, ObjCTypes.Int8PtrTy);
-  }
-  src = CGF.Builder.CreateBitCast(src, ObjCTypes.ObjectPtrTy);
-  dst = CGF.Builder.CreateBitCast(dst, ObjCTypes.PtrObjectPtrTy);
-  llvm::Value *args[] = { src, dst.getPointer() };
-  CGF.EmitNounwindRuntimeCall(ObjCTypes.getGcAssignWeakFn(),
-                              args, "weakassign");
-}
-
-/// EmitObjCGlobalAssign - Code gen for assigning to a __strong object.
-/// objc_assign_global (id src, id *dst)
-///
-void CGObjCNonFragileABIMac::EmitObjCGlobalAssign(CodeGen::CodeGenFunction &CGF,
-                                          llvm::Value *src, Address dst,
-                                          bool threadlocal) {
-  llvm::Type * SrcTy = src->getType();
-  if (!isa<llvm::PointerType>(SrcTy)) {
-    unsigned Size = CGM.getDataLayout().getTypeAllocSize(SrcTy);
-    assert(Size <= 8 && "does not support size > 8");
-    src = (Size == 4 ? CGF.Builder.CreateBitCast(src, ObjCTypes.IntTy)
-           : CGF.Builder.CreateBitCast(src, ObjCTypes.LongTy));
-    src = CGF.Builder.CreateIntToPtr(src, ObjCTypes.Int8PtrTy);
-  }
-  src = CGF.Builder.CreateBitCast(src, ObjCTypes.ObjectPtrTy);
-  dst = CGF.Builder.CreateBitCast(dst, ObjCTypes.PtrObjectPtrTy);
-  llvm::Value *args[] = { src, dst.getPointer() };
-  if (!threadlocal)
-    CGF.EmitNounwindRuntimeCall(ObjCTypes.getGcAssignGlobalFn(),
-                                args, "globalassign");
-  else
-    CGF.EmitNounwindRuntimeCall(ObjCTypes.getGcAssignThreadLocalFn(),
-                                args, "threadlocalassign");
-}
-
-void
-CGObjCNonFragileABIMac::EmitSynchronizedStmt(CodeGen::CodeGenFunction &CGF,
-                                             const ObjCAtSynchronizedStmt &S) {
-  EmitAtSynchronizedStmt(CGF, S,
-      cast<llvm::Function>(ObjCTypes.getSyncEnterFn()),
-      cast<llvm::Function>(ObjCTypes.getSyncExitFn()));
-}
-
-llvm::Constant *
-CGObjCNonFragileABIMac::GetEHType(QualType T) {
-  // There's a particular fixed type info for 'id'.
-  if (T->isObjCIdType() || T->isObjCQualifiedIdType()) {
-    auto *IDEHType = CGM.getModule().getGlobalVariable("OBJC_EHTYPE_id");
-    if (!IDEHType) {
-      IDEHType =
-          new llvm::GlobalVariable(CGM.getModule(), ObjCTypes.EHTypeTy, false,
-                                   llvm::GlobalValue::ExternalLinkage, nullptr,
-                                   "OBJC_EHTYPE_id");
-      if (CGM.getTriple().isOSBinFormatCOFF())
-        IDEHType->setDLLStorageClass(getStorage(CGM, "OBJC_EHTYPE_id"));
-    }
-    return IDEHType;
-  }
-
-  // All other types should be Objective-C interface pointer types.
-  const ObjCObjectPointerType *PT = T->getAs<ObjCObjectPointerType>();
-  assert(PT && "Invalid @catch type.");
-
-  const ObjCInterfaceType *IT = PT->getInterfaceType();
-  assert(IT && "Invalid @catch type.");
-
-  return GetInterfaceEHType(IT->getDecl(), NotForDefinition);
-}
-
-void CGObjCNonFragileABIMac::EmitTryStmt(CodeGen::CodeGenFunction &CGF,
-                                         const ObjCAtTryStmt &S) {
-  EmitTryCatchStmt(CGF, S,
-      cast<llvm::Function>(ObjCTypes.getObjCBeginCatchFn()),
-      cast<llvm::Function>(ObjCTypes.getObjCEndCatchFn()),
-      cast<llvm::Function>(ObjCTypes.getExceptionRethrowFn()));
-}
-
-/// EmitThrowStmt - Generate code for a throw statement.
-void CGObjCNonFragileABIMac::EmitThrowStmt(CodeGen::CodeGenFunction &CGF,
-                                           const ObjCAtThrowStmt &S,
-                                           bool ClearInsertionPoint) {
-  if (const Expr *ThrowExpr = S.getThrowExpr()) {
-    llvm::Value *Exception = CGF.EmitObjCThrowOperand(ThrowExpr);
-    Exception = CGF.Builder.CreateBitCast(Exception, ObjCTypes.ObjectPtrTy);
-    CGF.EmitRuntimeCallOrInvoke(ObjCTypes.getExceptionThrowFn(), Exception)
-      .setDoesNotReturn();
-  } else {
-    CGF.EmitRuntimeCallOrInvoke(ObjCTypes.getExceptionRethrowFn())
-      .setDoesNotReturn();
-  }
-
-  CGF.Builder.CreateUnreachable();
-  if (ClearInsertionPoint)
-    CGF.Builder.ClearInsertionPoint();
-}
-
-llvm::Constant *
-CGObjCNonFragileABIMac::GetInterfaceEHType(const ObjCInterfaceDecl *ID,
-                                           ForDefinition_t IsForDefinition) {
-  llvm::GlobalVariable * &Entry = EHTypeReferences[ID->getIdentifier()];
-  StringRef ClassName = ID->getObjCRuntimeNameAsString();
-
-  // If we don't need a definition, return the entry if found or check
-  // if we use an external reference.
-  if (!IsForDefinition) {
-    if (Entry)
-      return Entry;
-
-    // If this type (or a super class) has the __objc_exception__
-    // attribute, emit an external reference.
-    if (hasObjCExceptionAttribute(CGM.getContext(), ID)) {
-      std::string EHTypeName = ("OBJC_EHTYPE_$_" + ClassName).str();
-      Entry = new llvm::GlobalVariable(CGM.getModule(), ObjCTypes.EHTypeTy,
-                                       false, llvm::GlobalValue::ExternalLinkage,
-                                       nullptr, EHTypeName);
-      CGM.setGVProperties(Entry, ID);
-      return Entry;
-    }
-  }
-
-  // Otherwise we need to either make a new entry or fill in the initializer.
-  assert((!Entry || !Entry->hasInitializer()) && "Duplicate EHType definition");
-
-  std::string VTableName = "objc_ehtype_vtable";
-  auto *VTableGV = CGM.getModule().getGlobalVariable(VTableName);
-  if (!VTableGV) {
-    VTableGV =
-        new llvm::GlobalVariable(CGM.getModule(), ObjCTypes.Int8PtrTy, false,
-                                 llvm::GlobalValue::ExternalLinkage, nullptr,
-                                 VTableName);
-    if (CGM.getTriple().isOSBinFormatCOFF())
-      VTableGV->setDLLStorageClass(getStorage(CGM, VTableName));
-  }
-
-  llvm::Value *VTableIdx = llvm::ConstantInt::get(CGM.Int32Ty, 2);
-  ConstantInitBuilder builder(CGM);
-  auto values = builder.beginStruct(ObjCTypes.EHTypeTy);
-  values.add(
-    llvm::ConstantExpr::getInBoundsGetElementPtr(VTableGV->getValueType(),
-                                                 VTableGV, VTableIdx));
-  values.add(GetClassName(ClassName));
-  values.add(GetClassGlobal(ID, /*metaclass*/ false, NotForDefinition));
-
-  llvm::GlobalValue::LinkageTypes L = IsForDefinition
-                                          ? llvm::GlobalValue::ExternalLinkage
-                                          : llvm::GlobalValue::WeakAnyLinkage;
-  if (Entry) {
-    values.finishAndSetAsInitializer(Entry);
-    Entry->setAlignment(CGM.getPointerAlign().getQuantity());
-  } else {
-    Entry = values.finishAndCreateGlobal("OBJC_EHTYPE_$_" + ClassName,
-                                         CGM.getPointerAlign(),
-                                         /*constant*/ false,
-                                         L);
-    if (hasObjCExceptionAttribute(CGM.getContext(), ID))
-      CGM.setGVProperties(Entry, ID);
-  }
-  assert(Entry->getLinkage() == L);
-
-  if (!CGM.getTriple().isOSBinFormatCOFF())
-    if (ID->getVisibility() == HiddenVisibility)
-      Entry->setVisibility(llvm::GlobalValue::HiddenVisibility);
-
-  if (IsForDefinition)
-    if (CGM.getTriple().isOSBinFormatMachO())
-      Entry->setSection("__DATA,__objc_const");
-
-  return Entry;
-}
-
-/* *** */
-
-CodeGen::CGObjCRuntime *
-CodeGen::CreateMacObjCRuntime(CodeGen::CodeGenModule &CGM) {
-  switch (CGM.getLangOpts().ObjCRuntime.getKind()) {
-  case ObjCRuntime::FragileMacOSX:
-  return new CGObjCMac(CGM);
-
-  case ObjCRuntime::MacOSX:
-  case ObjCRuntime::iOS:
-  case ObjCRuntime::WatchOS:
-    return new CGObjCNonFragileABIMac(CGM);
-
-  case ObjCRuntime::GNUstep:
-  case ObjCRuntime::GCC:
-  case ObjCRuntime::ObjFW:
-    llvm_unreachable("these runtimes are not Mac runtimes");
-  }
-  llvm_unreachable("bad runtime");
-}