diff --git a/clang/lib/CodeGen/CGAtomic.cpp b/clang/lib/CodeGen/CGAtomic.cpp
--- a/clang/lib/CodeGen/CGAtomic.cpp
+++ b/clang/lib/CodeGen/CGAtomic.cpp
@@ -307,7 +307,7 @@
   const CGFunctionInfo &fnInfo =
     CGF.CGM.getTypes().arrangeBuiltinFunctionCall(resultType, args);
   llvm::FunctionType *fnTy = CGF.CGM.getTypes().GetFunctionType(fnInfo);
-  llvm::Constant *fn = CGF.CGM.CreateRuntimeFunction(fnTy, fnName);
+  llvm::FunctionCallee fn = CGF.CGM.CreateRuntimeFunction(fnTy, fnName);
   auto callee = CGCallee::forDirect(fn);
   return CGF.EmitCall(fnInfo, callee, ReturnValueSlot(), args);
 }
diff --git a/clang/lib/CodeGen/CGBlocks.cpp b/clang/lib/CodeGen/CGBlocks.cpp
--- a/clang/lib/CodeGen/CGBlocks.cpp
+++ b/clang/lib/CodeGen/CGBlocks.cpp
@@ -2284,7 +2284,7 @@
     unsigned flags = (Flags | BLOCK_BYREF_CALLER).getBitMask();
 
     llvm::Value *flagsVal = llvm::ConstantInt::get(CGF.Int32Ty, flags);
-    llvm::Value *fn = CGF.CGM.getBlockObjectAssign();
+    llvm::FunctionCallee fn = CGF.CGM.getBlockObjectAssign();
 
     llvm::Value *args[] = { destField.getPointer(), srcValue, flagsVal };
     CGF.EmitNounwindRuntimeCall(fn, args);
@@ -2931,7 +2931,7 @@
 
 void CodeGenFunction::BuildBlockRelease(llvm::Value *V, BlockFieldFlags flags,
                                         bool CanThrow) {
-  llvm::Value *F = CGM.getBlockObjectDispose();
+  llvm::FunctionCallee F = CGM.getBlockObjectDispose();
   llvm::Value *args[] = {
     Builder.CreateBitCast(V, Int8PtrTy),
     llvm::ConstantInt::get(Int32Ty, flags.getBitMask())
@@ -2987,7 +2987,7 @@
   CGM.setDSOLocal(GV);
 }
 
-llvm::Constant *CodeGenModule::getBlockObjectDispose() {
+llvm::FunctionCallee CodeGenModule::getBlockObjectDispose() {
   if (BlockObjectDispose)
     return BlockObjectDispose;
 
@@ -2995,11 +2995,12 @@
   llvm::FunctionType *fty
     = llvm::FunctionType::get(VoidTy, args, false);
   BlockObjectDispose = CreateRuntimeFunction(fty, "_Block_object_dispose");
-  configureBlocksRuntimeObject(*this, BlockObjectDispose);
+  configureBlocksRuntimeObject(
+      *this, cast<llvm::Constant>(BlockObjectDispose.getCallee()));
   return BlockObjectDispose;
 }
 
-llvm::Constant *CodeGenModule::getBlockObjectAssign() {
+llvm::FunctionCallee CodeGenModule::getBlockObjectAssign() {
   if (BlockObjectAssign)
     return BlockObjectAssign;
 
@@ -3007,7 +3008,8 @@
   llvm::FunctionType *fty
     = llvm::FunctionType::get(VoidTy, args, false);
   BlockObjectAssign = CreateRuntimeFunction(fty, "_Block_object_assign");
-  configureBlocksRuntimeObject(*this, BlockObjectAssign);
+  configureBlocksRuntimeObject(
+      *this, cast<llvm::Constant>(BlockObjectAssign.getCallee()));
   return BlockObjectAssign;
 }
 
diff --git a/clang/lib/CodeGen/CGBuiltin.cpp b/clang/lib/CodeGen/CGBuiltin.cpp
--- a/clang/lib/CodeGen/CGBuiltin.cpp
+++ b/clang/lib/CodeGen/CGBuiltin.cpp
@@ -794,7 +794,7 @@
   llvm::AttributeList ReturnsTwiceAttr = llvm::AttributeList::get(
       CGF.getLLVMContext(), llvm::AttributeList::FunctionIndex,
       llvm::Attribute::ReturnsTwice);
-  llvm::Constant *SetJmpFn = CGF.CGM.CreateRuntimeFunction(
+  llvm::FunctionCallee SetJmpFn = CGF.CGM.CreateRuntimeFunction(
       llvm::FunctionType::get(CGF.IntTy, ArgTypes, IsVarArg), Name,
       ReturnsTwiceAttr, /*Local=*/true);
 
@@ -2734,7 +2734,7 @@
     const CGFunctionInfo &FuncInfo =
         CGM.getTypes().arrangeBuiltinFunctionCall(E->getType(), Args);
     llvm::FunctionType *FTy = CGM.getTypes().GetFunctionType(FuncInfo);
-    llvm::Constant *Func = CGM.CreateRuntimeFunction(FTy, LibCallName);
+    llvm::FunctionCallee Func = CGM.CreateRuntimeFunction(FTy, LibCallName);
     return EmitCall(FuncInfo, CGCallee::forDirect(Func),
                     ReturnValueSlot(), Args);
   }
@@ -9739,10 +9739,11 @@
 Value *CodeGenFunction::EmitX86CpuInit() {
   llvm::FunctionType *FTy = llvm::FunctionType::get(VoidTy,
                                                     /*Variadic*/ false);
-  llvm::Constant *Func = CGM.CreateRuntimeFunction(FTy, "__cpu_indicator_init");
-  cast<llvm::GlobalValue>(Func)->setDSOLocal(true);
-  cast<llvm::GlobalValue>(Func)->setDLLStorageClass(
-      llvm::GlobalValue::DefaultStorageClass);
+  llvm::FunctionCallee Func =
+      CGM.CreateRuntimeFunction(FTy, "__cpu_indicator_init");
+  cast<llvm::GlobalValue>(Func.getCallee())->setDSOLocal(true);
+  cast<llvm::GlobalValue>(Func.getCallee())
+      ->setDLLStorageClass(llvm::GlobalValue::DefaultStorageClass);
   return Builder.CreateCall(Func);
 }
 
diff --git a/clang/lib/CodeGen/CGCUDANV.cpp b/clang/lib/CodeGen/CGCUDANV.cpp
--- a/clang/lib/CodeGen/CGCUDANV.cpp
+++ b/clang/lib/CodeGen/CGCUDANV.cpp
@@ -51,8 +51,8 @@
   /// Whether we generate relocatable device code.
   bool RelocatableDeviceCode;
 
-  llvm::Constant *getSetupArgumentFn() const;
-  llvm::Constant *getLaunchFn() const;
+  llvm::FunctionCallee getSetupArgumentFn() const;
+  llvm::FunctionCallee getLaunchFn() const;
 
   llvm::FunctionType *getRegisterGlobalsFnTy() const;
   llvm::FunctionType *getCallbackFnTy() const;
@@ -151,7 +151,7 @@
   VoidPtrPtrTy = VoidPtrTy->getPointerTo();
 }
 
-llvm::Constant *CGNVCUDARuntime::getSetupArgumentFn() const {
+llvm::FunctionCallee CGNVCUDARuntime::getSetupArgumentFn() const {
   // cudaError_t cudaSetupArgument(void *, size_t, size_t)
   llvm::Type *Params[] = {VoidPtrTy, SizeTy, SizeTy};
   return CGM.CreateRuntimeFunction(
@@ -159,7 +159,7 @@
       addPrefixToName("SetupArgument"));
 }
 
-llvm::Constant *CGNVCUDARuntime::getLaunchFn() const {
+llvm::FunctionCallee CGNVCUDARuntime::getLaunchFn() const {
   if (CGM.getLangOpts().HIP) {
     // hipError_t hipLaunchByPtr(char *);
     return CGM.CreateRuntimeFunction(
@@ -249,7 +249,7 @@
       CGF.CreateTempAlloca(SizeTy, CGM.getSizeAlign(), "shmem_size");
   Address Stream =
       CGF.CreateTempAlloca(VoidPtrTy, CGM.getPointerAlign(), "stream");
-  llvm::Constant *cudaPopConfigFn = CGM.CreateRuntimeFunction(
+  llvm::FunctionCallee cudaPopConfigFn = CGM.CreateRuntimeFunction(
       llvm::FunctionType::get(IntTy,
                               {/*gridDim=*/GridDim.getType(),
                                /*blockDim=*/BlockDim.getType(),
@@ -283,7 +283,7 @@
 
   const CGFunctionInfo &FI =
       CGM.getTypes().arrangeFunctionDeclaration(cudaLaunchKernelFD);
-  llvm::Constant *cudaLaunchKernelFn =
+  llvm::FunctionCallee cudaLaunchKernelFn =
       CGM.CreateRuntimeFunction(FTy, "cudaLaunchKernel");
   CGF.EmitCall(FI, CGCallee::forDirect(cudaLaunchKernelFn), ReturnValueSlot(),
                LaunchKernelArgs);
@@ -295,7 +295,7 @@
 void CGNVCUDARuntime::emitDeviceStubBodyLegacy(CodeGenFunction &CGF,
                                                FunctionArgList &Args) {
   // Emit a call to cudaSetupArgument for each arg in Args.
-  llvm::Constant *cudaSetupArgFn = getSetupArgumentFn();
+  llvm::FunctionCallee cudaSetupArgFn = getSetupArgumentFn();
   llvm::BasicBlock *EndBlock = CGF.createBasicBlock("setup.end");
   CharUnits Offset = CharUnits::Zero();
   for (const VarDecl *A : Args) {
@@ -319,7 +319,7 @@
   }
 
   // Emit the call to cudaLaunch
-  llvm::Constant *cudaLaunchFn = getLaunchFn();
+  llvm::FunctionCallee cudaLaunchFn = getLaunchFn();
   llvm::Value *Arg = CGF.Builder.CreatePointerCast(CGF.CurFn, CharPtrTy);
   CGF.EmitRuntimeCallOrInvoke(cudaLaunchFn, Arg);
   CGF.EmitBranch(EndBlock);
@@ -359,7 +359,7 @@
   llvm::Type *RegisterFuncParams[] = {
       VoidPtrPtrTy, CharPtrTy, CharPtrTy, CharPtrTy, IntTy,
       VoidPtrTy,    VoidPtrTy, VoidPtrTy, VoidPtrTy, IntTy->getPointerTo()};
-  llvm::Constant *RegisterFunc = CGM.CreateRuntimeFunction(
+  llvm::FunctionCallee RegisterFunc = CGM.CreateRuntimeFunction(
       llvm::FunctionType::get(IntTy, RegisterFuncParams, false),
       addUnderscoredPrefixToName("RegisterFunction"));
 
@@ -383,7 +383,7 @@
   llvm::Type *RegisterVarParams[] = {VoidPtrPtrTy, CharPtrTy, CharPtrTy,
                                      CharPtrTy,    IntTy,     IntTy,
                                      IntTy,        IntTy};
-  llvm::Constant *RegisterVar = CGM.CreateRuntimeFunction(
+  llvm::FunctionCallee RegisterVar = CGM.CreateRuntimeFunction(
       llvm::FunctionType::get(IntTy, RegisterVarParams, false),
       addUnderscoredPrefixToName("RegisterVar"));
   for (auto &Pair : DeviceVars) {
@@ -442,7 +442,7 @@
     RegisterGlobalsFunc = makeDummyFunction(getRegisterGlobalsFnTy());
 
   // void ** __{cuda|hip}RegisterFatBinary(void *);
-  llvm::Constant *RegisterFatbinFunc = CGM.CreateRuntimeFunction(
+  llvm::FunctionCallee RegisterFatbinFunc = CGM.CreateRuntimeFunction(
       llvm::FunctionType::get(VoidPtrPtrTy, VoidPtrTy, false),
       addUnderscoredPrefixToName("RegisterFatBinary"));
   // struct { int magic, int version, void * gpu_binary, void * dont_care };
@@ -632,7 +632,7 @@
     // void *, void (*)(void **))
     SmallString<128> RegisterLinkedBinaryName("__cudaRegisterLinkedBinary");
     RegisterLinkedBinaryName += ModuleID;
-    llvm::Constant *RegisterLinkedBinaryFunc = CGM.CreateRuntimeFunction(
+    llvm::FunctionCallee RegisterLinkedBinaryFunc = CGM.CreateRuntimeFunction(
         getRegisterLinkedBinaryFnTy(), RegisterLinkedBinaryName);
 
     assert(RegisterGlobalsFunc && "Expecting at least dummy function!");
@@ -650,7 +650,7 @@
     // extern "C" int atexit(void (*f)(void));
     llvm::FunctionType *AtExitTy =
         llvm::FunctionType::get(IntTy, CleanupFn->getType(), false);
-    llvm::Constant *AtExitFunc =
+    llvm::FunctionCallee AtExitFunc =
         CGM.CreateRuntimeFunction(AtExitTy, "atexit", llvm::AttributeList(),
                                   /*Local=*/true);
     CtorBuilder.CreateCall(AtExitFunc, CleanupFn);
@@ -685,7 +685,7 @@
     return nullptr;
 
   // void __cudaUnregisterFatBinary(void ** handle);
-  llvm::Constant *UnregisterFatbinFunc = CGM.CreateRuntimeFunction(
+  llvm::FunctionCallee UnregisterFatbinFunc = CGM.CreateRuntimeFunction(
       llvm::FunctionType::get(VoidTy, VoidPtrPtrTy, false),
       addUnderscoredPrefixToName("UnregisterFatBinary"));
 
diff --git a/clang/lib/CodeGen/CGCall.h b/clang/lib/CodeGen/CGCall.h
--- a/clang/lib/CodeGen/CGCall.h
+++ b/clang/lib/CodeGen/CGCall.h
@@ -135,6 +135,12 @@
       return CGCallee(abstractInfo, functionPtr);
     }
 
+    static CGCallee
+    forDirect(llvm::FunctionCallee functionPtr,
+              const CGCalleeInfo &abstractInfo = CGCalleeInfo()) {
+      return CGCallee(abstractInfo, functionPtr.getCallee());
+    }
+
     static CGCallee forVirtual(const CallExpr *CE, GlobalDecl MD, Address Addr,
                                llvm::FunctionType *FTy) {
       CGCallee result(SpecialKind::Virtual);
diff --git a/clang/lib/CodeGen/CGCall.cpp b/clang/lib/CodeGen/CGCall.cpp
--- a/clang/lib/CodeGen/CGCall.cpp
+++ b/clang/lib/CodeGen/CGCall.cpp
@@ -3688,15 +3688,15 @@
 
 /// Emits a call to the given no-arguments nounwind runtime function.
 llvm::CallInst *
-CodeGenFunction::EmitNounwindRuntimeCall(llvm::Value *callee,
+CodeGenFunction::EmitNounwindRuntimeCall(llvm::FunctionCallee callee,
                                          const llvm::Twine &name) {
   return EmitNounwindRuntimeCall(callee, None, name);
 }
 
 /// Emits a call to the given nounwind runtime function.
 llvm::CallInst *
-CodeGenFunction::EmitNounwindRuntimeCall(llvm::Value *callee,
-                                         ArrayRef<llvm::Value*> args,
+CodeGenFunction::EmitNounwindRuntimeCall(llvm::FunctionCallee callee,
+                                         ArrayRef<llvm::Value *> args,
                                          const llvm::Twine &name) {
   llvm::CallInst *call = EmitRuntimeCall(callee, args, name);
   call->setDoesNotThrow();
@@ -3705,9 +3705,8 @@
 
 /// Emits a simple call (never an invoke) to the given no-arguments
 /// runtime function.
-llvm::CallInst *
-CodeGenFunction::EmitRuntimeCall(llvm::Value *callee,
-                                 const llvm::Twine &name) {
+llvm::CallInst *CodeGenFunction::EmitRuntimeCall(llvm::FunctionCallee callee,
+                                                 const llvm::Twine &name) {
   return EmitRuntimeCall(callee, None, name);
 }
 
@@ -3731,21 +3730,20 @@
 }
 
 /// Emits a simple call (never an invoke) to the given runtime function.
-llvm::CallInst *
-CodeGenFunction::EmitRuntimeCall(llvm::Value *callee,
-                                 ArrayRef<llvm::Value*> args,
-                                 const llvm::Twine &name) {
-  llvm::CallInst *call =
-      Builder.CreateCall(callee, args, getBundlesForFunclet(callee), name);
+llvm::CallInst *CodeGenFunction::EmitRuntimeCall(llvm::FunctionCallee callee,
+                                                 ArrayRef<llvm::Value *> args,
+                                                 const llvm::Twine &name) {
+  llvm::CallInst *call = Builder.CreateCall(
+      callee, args, getBundlesForFunclet(callee.getCallee()), name);
   call->setCallingConv(getRuntimeCC());
   return call;
 }
 
 /// Emits a call or invoke to the given noreturn runtime function.
-void CodeGenFunction::EmitNoreturnRuntimeCallOrInvoke(llvm::Value *callee,
-                                               ArrayRef<llvm::Value*> args) {
+void CodeGenFunction::EmitNoreturnRuntimeCallOrInvoke(
+    llvm::FunctionCallee callee, ArrayRef<llvm::Value *> args) {
   SmallVector<llvm::OperandBundleDef, 1> BundleList =
-      getBundlesForFunclet(callee);
+      getBundlesForFunclet(callee.getCallee());
 
   if (getInvokeDest()) {
     llvm::InvokeInst *invoke =
@@ -3765,14 +3763,17 @@
 }
 
 /// Emits a call or invoke instruction to the given nullary runtime function.
-llvm::CallBase *CodeGenFunction::EmitRuntimeCallOrInvoke(llvm::Value *callee,
-                                                         const Twine &name) {
+llvm::CallBase *
+CodeGenFunction::EmitRuntimeCallOrInvoke(llvm::FunctionCallee callee,
+                                         const Twine &name) {
   return EmitRuntimeCallOrInvoke(callee, None, name);
 }
 
 /// Emits a call or invoke instruction to the given runtime function.
-llvm::CallBase *CodeGenFunction::EmitRuntimeCallOrInvoke(
-    llvm::Value *callee, ArrayRef<llvm::Value *> args, const Twine &name) {
+llvm::CallBase *
+CodeGenFunction::EmitRuntimeCallOrInvoke(llvm::FunctionCallee callee,
+                                         ArrayRef<llvm::Value *> args,
+                                         const Twine &name) {
   llvm::CallBase *call = EmitCallOrInvoke(callee, args, name);
   call->setCallingConv(getRuntimeCC());
   return call;
@@ -3780,12 +3781,12 @@
 
 /// Emits a call or invoke instruction to the given function, depending
 /// on the current state of the EH stack.
-llvm::CallBase *CodeGenFunction::EmitCallOrInvoke(llvm::Value *Callee,
+llvm::CallBase *CodeGenFunction::EmitCallOrInvoke(llvm::FunctionCallee Callee,
                                                   ArrayRef<llvm::Value *> Args,
                                                   const Twine &Name) {
   llvm::BasicBlock *InvokeDest = getInvokeDest();
   SmallVector<llvm::OperandBundleDef, 1> BundleList =
-      getBundlesForFunclet(Callee);
+      getBundlesForFunclet(Callee.getCallee());
 
   llvm::CallBase *Inst;
   if (!InvokeDest)
@@ -4428,7 +4429,8 @@
         llvm::IRBuilder<>::InsertPointGuard IPGuard(Builder);
         Builder.SetInsertPoint(CI);
         auto *FnType = llvm::FunctionType::get(CGM.VoidTy, /*isVarArg=*/false);
-        auto *Fn = CGM.CreateRuntimeFunction(FnType, "__asan_handle_no_return");
+        llvm::FunctionCallee Fn =
+            CGM.CreateRuntimeFunction(FnType, "__asan_handle_no_return");
         EmitNounwindRuntimeCall(Fn);
       }
     }
diff --git a/clang/lib/CodeGen/CGClass.cpp b/clang/lib/CodeGen/CGClass.cpp
--- a/clang/lib/CodeGen/CGClass.cpp
+++ b/clang/lib/CodeGen/CGClass.cpp
@@ -792,7 +792,7 @@
   llvm::Type *Args[2] = {IntPtrTy, IntPtrTy};
   llvm::FunctionType *FTy =
       llvm::FunctionType::get(CGM.VoidTy, Args, false);
-  llvm::Constant *F = CGM.CreateRuntimeFunction(
+  llvm::FunctionCallee F = CGM.CreateRuntimeFunction(
       FTy, Prologue ? "__asan_poison_intra_object_redzone"
                     : "__asan_unpoison_intra_object_redzone");
 
@@ -1626,7 +1626,7 @@
 
    llvm::FunctionType *FnType =
        llvm::FunctionType::get(CGF.VoidTy, ArgTypes, false);
-   llvm::Value *Fn =
+   llvm::FunctionCallee Fn =
        CGF.CGM.CreateRuntimeFunction(FnType, "__sanitizer_dtor_callback");
    CGF.EmitNounwindRuntimeCall(Fn, Args);
  }
diff --git a/clang/lib/CodeGen/CGDeclCXX.cpp b/clang/lib/CodeGen/CGDeclCXX.cpp
--- a/clang/lib/CodeGen/CGDeclCXX.cpp
+++ b/clang/lib/CodeGen/CGDeclCXX.cpp
@@ -260,10 +260,10 @@
   llvm::FunctionType *atexitTy =
     llvm::FunctionType::get(IntTy, dtorStub->getType(), false);
 
-  llvm::Constant *atexit =
+  llvm::FunctionCallee atexit =
       CGM.CreateRuntimeFunction(atexitTy, "atexit", llvm::AttributeList(),
                                 /*Local=*/true);
-  if (llvm::Function *atexitFn = dyn_cast<llvm::Function>(atexit))
+  if (llvm::Function *atexitFn = dyn_cast<llvm::Function>(atexit.getCallee()))
     atexitFn->setDoesNotThrow();
 
   EmitNounwindRuntimeCall(atexit, dtorStub);
diff --git a/clang/lib/CodeGen/CGException.cpp b/clang/lib/CodeGen/CGException.cpp
--- a/clang/lib/CodeGen/CGException.cpp
+++ b/clang/lib/CodeGen/CGException.cpp
@@ -28,7 +28,7 @@
 using namespace clang;
 using namespace CodeGen;
 
-static llvm::Constant *getFreeExceptionFn(CodeGenModule &CGM) {
+static llvm::FunctionCallee getFreeExceptionFn(CodeGenModule &CGM) {
   // void __cxa_free_exception(void *thrown_exception);
 
   llvm::FunctionType *FTy =
@@ -37,7 +37,7 @@
   return CGM.CreateRuntimeFunction(FTy, "__cxa_free_exception");
 }
 
-static llvm::Constant *getUnexpectedFn(CodeGenModule &CGM) {
+static llvm::FunctionCallee getUnexpectedFn(CodeGenModule &CGM) {
   // void __cxa_call_unexpected(void *thrown_exception);
 
   llvm::FunctionType *FTy =
@@ -46,7 +46,7 @@
   return CGM.CreateRuntimeFunction(FTy, "__cxa_call_unexpected");
 }
 
-llvm::Constant *CodeGenModule::getTerminateFn() {
+llvm::FunctionCallee CodeGenModule::getTerminateFn() {
   // void __terminate();
 
   llvm::FunctionType *FTy =
@@ -72,8 +72,8 @@
   return CreateRuntimeFunction(FTy, name);
 }
 
-static llvm::Constant *getCatchallRethrowFn(CodeGenModule &CGM,
-                                            StringRef Name) {
+static llvm::FunctionCallee getCatchallRethrowFn(CodeGenModule &CGM,
+                                                 StringRef Name) {
   llvm::FunctionType *FTy =
     llvm::FunctionType::get(CGM.VoidTy, CGM.Int8PtrTy, /*IsVarArgs=*/false);
 
@@ -238,8 +238,8 @@
   return get(CGF.CGM, dyn_cast_or_null<FunctionDecl>(FD));
 }
 
-static llvm::Constant *getPersonalityFn(CodeGenModule &CGM,
-                                        const EHPersonality &Personality) {
+static llvm::FunctionCallee getPersonalityFn(CodeGenModule &CGM,
+                                             const EHPersonality &Personality) {
   return CGM.CreateRuntimeFunction(llvm::FunctionType::get(CGM.Int32Ty, true),
                                    Personality.PersonalityFn,
                                    llvm::AttributeList(), /*Local=*/true);
@@ -247,12 +247,13 @@
 
 static llvm::Constant *getOpaquePersonalityFn(CodeGenModule &CGM,
                                         const EHPersonality &Personality) {
-  llvm::Constant *Fn = getPersonalityFn(CGM, Personality);
+  llvm::FunctionCallee Fn = getPersonalityFn(CGM, Personality);
   llvm::PointerType* Int8PtrTy = llvm::PointerType::get(
       llvm::Type::getInt8Ty(CGM.getLLVMContext()),
       CGM.getDataLayout().getProgramAddressSpace());
 
-  return llvm::ConstantExpr::getBitCast(Fn, Int8PtrTy);
+  return llvm::ConstantExpr::getBitCast(cast<llvm::Constant>(Fn.getCallee()),
+                                        Int8PtrTy);
 }
 
 /// Check whether a landingpad instruction only uses C++ features.
@@ -343,12 +344,13 @@
 
   // Create the C++ personality function and kill off the old
   // function.
-  llvm::Constant *CXXFn = getPersonalityFn(*this, CXX);
+  llvm::FunctionCallee CXXFn = getPersonalityFn(*this, CXX);
 
   // This can happen if the user is screwing with us.
-  if (Fn->getType() != CXXFn->getType()) return;
+  if (Fn->getType() != CXXFn.getCallee()->getType())
+    return;
 
-  Fn->replaceAllUsesWith(CXXFn);
+  Fn->replaceAllUsesWith(CXXFn.getCallee());
   Fn->eraseFromParent();
 }
 
@@ -1267,9 +1269,10 @@
 namespace {
   struct CallEndCatchForFinally final : EHScopeStack::Cleanup {
     llvm::Value *ForEHVar;
-    llvm::Value *EndCatchFn;
-    CallEndCatchForFinally(llvm::Value *ForEHVar, llvm::Value *EndCatchFn)
-      : ForEHVar(ForEHVar), EndCatchFn(EndCatchFn) {}
+    llvm::FunctionCallee EndCatchFn;
+    CallEndCatchForFinally(llvm::Value *ForEHVar,
+                           llvm::FunctionCallee EndCatchFn)
+        : ForEHVar(ForEHVar), EndCatchFn(EndCatchFn) {}
 
     void Emit(CodeGenFunction &CGF, Flags flags) override {
       llvm::BasicBlock *EndCatchBB = CGF.createBasicBlock("finally.endcatch");
@@ -1288,15 +1291,15 @@
   struct PerformFinally final : EHScopeStack::Cleanup {
     const Stmt *Body;
     llvm::Value *ForEHVar;
-    llvm::Value *EndCatchFn;
-    llvm::Value *RethrowFn;
+    llvm::FunctionCallee EndCatchFn;
+    llvm::FunctionCallee RethrowFn;
     llvm::Value *SavedExnVar;
 
     PerformFinally(const Stmt *Body, llvm::Value *ForEHVar,
-                   llvm::Value *EndCatchFn,
-                   llvm::Value *RethrowFn, llvm::Value *SavedExnVar)
-      : Body(Body), ForEHVar(ForEHVar), EndCatchFn(EndCatchFn),
-        RethrowFn(RethrowFn), SavedExnVar(SavedExnVar) {}
+                   llvm::FunctionCallee EndCatchFn,
+                   llvm::FunctionCallee RethrowFn, llvm::Value *SavedExnVar)
+        : Body(Body), ForEHVar(ForEHVar), EndCatchFn(EndCatchFn),
+          RethrowFn(RethrowFn), SavedExnVar(SavedExnVar) {}
 
     void Emit(CodeGenFunction &CGF, Flags flags) override {
       // Enter a cleanup to call the end-catch function if one was provided.
@@ -1358,12 +1361,11 @@
 /// Enters a finally block for an implementation using zero-cost
 /// exceptions.  This is mostly general, but hard-codes some
 /// language/ABI-specific behavior in the catch-all sections.
-void CodeGenFunction::FinallyInfo::enter(CodeGenFunction &CGF,
-                                         const Stmt *body,
-                                         llvm::Constant *beginCatchFn,
-                                         llvm::Constant *endCatchFn,
-                                         llvm::Constant *rethrowFn) {
-  assert((beginCatchFn != nullptr) == (endCatchFn != nullptr) &&
+void CodeGenFunction::FinallyInfo::enter(CodeGenFunction &CGF, const Stmt *body,
+                                         llvm::FunctionCallee beginCatchFn,
+                                         llvm::FunctionCallee endCatchFn,
+                                         llvm::FunctionCallee rethrowFn) {
+  assert((!!beginCatchFn) == (!!endCatchFn) &&
          "begin/end catch functions not paired");
   assert(rethrowFn && "rethrow function is required");
 
@@ -1375,9 +1377,7 @@
   // In the latter case we need to pass it the exception object.
   // But we can't use the exception slot because the @finally might
   // have a landing pad (which would overwrite the exception slot).
-  llvm::FunctionType *rethrowFnTy =
-    cast<llvm::FunctionType>(
-      cast<llvm::PointerType>(rethrowFn->getType())->getElementType());
+  llvm::FunctionType *rethrowFnTy = rethrowFn.getFunctionType();
   SavedExnVar = nullptr;
   if (rethrowFnTy->getNumParams())
     SavedExnVar = CGF.CreateTempAlloca(CGF.Int8PtrTy, "finally.exn");
diff --git a/clang/lib/CodeGen/CGExpr.cpp b/clang/lib/CodeGen/CGExpr.cpp
--- a/clang/lib/CodeGen/CGExpr.cpp
+++ b/clang/lib/CodeGen/CGExpr.cpp
@@ -2915,7 +2915,7 @@
   }
   B.addAttribute(llvm::Attribute::UWTable);
 
-  llvm::Value *Fn = CGF.CGM.CreateRuntimeFunction(
+  llvm::FunctionCallee Fn = CGF.CGM.CreateRuntimeFunction(
       FnType, FnName,
       llvm::AttributeList::get(CGF.getLLVMContext(),
                                llvm::AttributeList::FunctionIndex, B),
diff --git a/clang/lib/CodeGen/CGExprComplex.cpp b/clang/lib/CodeGen/CGExprComplex.cpp
--- a/clang/lib/CodeGen/CGExprComplex.cpp
+++ b/clang/lib/CodeGen/CGExprComplex.cpp
@@ -627,7 +627,8 @@
       Args, cast<FunctionType>(FQTy.getTypePtr()), false);
 
   llvm::FunctionType *FTy = CGF.CGM.getTypes().GetFunctionType(FuncInfo);
-  llvm::Constant *Func = CGF.CGM.CreateBuiltinFunction(FTy, LibCallName);
+  llvm::FunctionCallee Func = CGF.CGM.CreateRuntimeFunction(
+      FTy, LibCallName, llvm::AttributeList(), true);
   CGCallee Callee = CGCallee::forDirect(Func, FQTy->getAs<FunctionProtoType>());
 
   llvm::CallBase *Call;
diff --git a/clang/lib/CodeGen/CGExprScalar.cpp b/clang/lib/CodeGen/CGExprScalar.cpp
--- a/clang/lib/CodeGen/CGExprScalar.cpp
+++ b/clang/lib/CodeGen/CGExprScalar.cpp
@@ -3110,7 +3110,8 @@
   llvm::Type *argTypes[] = { CGF.Int64Ty, CGF.Int64Ty, Int8Ty, Int8Ty };
   llvm::FunctionType *handlerTy =
       llvm::FunctionType::get(CGF.Int64Ty, argTypes, true);
-  llvm::Value *handler = CGF.CGM.CreateRuntimeFunction(handlerTy, *handlerName);
+  llvm::FunctionCallee handler =
+      CGF.CGM.CreateRuntimeFunction(handlerTy, *handlerName);
 
   // Sign extend the args to 64-bit, so that we can use the same handler for
   // all types of overflow.
diff --git a/clang/lib/CodeGen/CGObjC.cpp b/clang/lib/CodeGen/CGObjC.cpp
--- a/clang/lib/CodeGen/CGObjC.cpp
+++ b/clang/lib/CodeGen/CGObjC.cpp
@@ -683,7 +683,8 @@
   args.add(RValue::get(CGF.Builder.getInt1(isAtomic)), Context.BoolTy);
   args.add(RValue::get(CGF.Builder.getInt1(hasStrong)), Context.BoolTy);
 
-  llvm::Constant *fn = CGF.CGM.getObjCRuntime().GetGetStructFunction();
+  llvm::Constant *fn = cast<llvm::Constant>(
+      CGF.CGM.getObjCRuntime().GetGetStructFunction().getCallee());
   CGCallee callee = CGCallee::forDirect(fn);
   CGF.EmitCall(CGF.getTypes().arrangeBuiltinFunctionCall(Context.VoidTy, args),
                callee, ReturnValueSlot(), args);
@@ -947,8 +948,8 @@
   // Third argument is the helper function.
   args.add(RValue::get(AtomicHelperFn), CGF.getContext().VoidPtrTy);
 
-  llvm::Constant *copyCppAtomicObjectFn =
-    CGF.CGM.getObjCRuntime().GetCppAtomicObjectGetFunction();
+  llvm::Constant *copyCppAtomicObjectFn = cast<llvm::Constant>(
+      CGF.CGM.getObjCRuntime().GetCppAtomicObjectGetFunction().getCallee());
   CGCallee callee = CGCallee::forDirect(copyCppAtomicObjectFn);
   CGF.EmitCall(
       CGF.getTypes().arrangeBuiltinFunctionCall(CGF.getContext().VoidTy, args),
@@ -1024,8 +1025,8 @@
   }
 
   case PropertyImplStrategy::GetSetProperty: {
-    llvm::Constant *getPropertyFn =
-      CGM.getObjCRuntime().GetPropertyGetFunction();
+    llvm::Constant *getPropertyFn = cast<llvm::Constant>(
+        CGM.getObjCRuntime().GetPropertyGetFunction().getCallee());
     if (!getPropertyFn) {
       CGM.ErrorUnsupported(propImpl, "Obj-C getter requiring atomic copy");
       return;
@@ -1168,7 +1169,8 @@
   // FIXME: should this really always be false?
   args.add(RValue::get(CGF.Builder.getFalse()), CGF.getContext().BoolTy);
 
-  llvm::Constant *fn = CGF.CGM.getObjCRuntime().GetSetStructFunction();
+  llvm::Constant *fn = cast<llvm::Constant>(
+      CGF.CGM.getObjCRuntime().GetSetStructFunction().getCallee());
   CGCallee callee = CGCallee::forDirect(fn);
   CGF.EmitCall(
       CGF.getTypes().arrangeBuiltinFunctionCall(CGF.getContext().VoidTy, args),
@@ -1205,8 +1207,8 @@
   // Third argument is the helper function.
   args.add(RValue::get(AtomicHelperFn), CGF.getContext().VoidPtrTy);
 
-  llvm::Constant *fn =
-    CGF.CGM.getObjCRuntime().GetCppAtomicObjectSetFunction();
+  llvm::Constant *fn = cast<llvm::Constant>(
+      CGF.CGM.getObjCRuntime().GetCppAtomicObjectSetFunction().getCallee());
   CGCallee callee = CGCallee::forDirect(fn);
   CGF.EmitCall(
       CGF.getTypes().arrangeBuiltinFunctionCall(CGF.getContext().VoidTy, args),
@@ -1305,16 +1307,18 @@
     if (UseOptimizedSetter(CGM)) {
       // 10.8 and iOS 6.0 code and GC is off
       setOptimizedPropertyFn =
-        CGM.getObjCRuntime()
-           .GetOptimizedPropertySetFunction(strategy.isAtomic(),
-                                            strategy.isCopy());
+          cast<llvm::Constant>(CGM.getObjCRuntime()
+                                   .GetOptimizedPropertySetFunction(
+                                       strategy.isAtomic(), strategy.isCopy())
+                                   .getCallee());
       if (!setOptimizedPropertyFn) {
         CGM.ErrorUnsupported(propImpl, "Obj-C optimized setter - NYI");
         return;
       }
     }
     else {
-      setPropertyFn = CGM.getObjCRuntime().GetPropertySetFunction();
+      setPropertyFn = cast<llvm::Constant>(
+          CGM.getObjCRuntime().GetPropertySetFunction().getCallee());
       if (!setPropertyFn) {
         CGM.ErrorUnsupported(propImpl, "Obj-C setter requiring atomic copy");
         return;
@@ -1558,8 +1562,8 @@
 }
 
 void CodeGenFunction::EmitObjCForCollectionStmt(const ObjCForCollectionStmt &S){
-  llvm::Constant *EnumerationMutationFnPtr =
-    CGM.getObjCRuntime().EnumerationMutationFunction();
+  llvm::Constant *EnumerationMutationFnPtr = cast<llvm::Constant>(
+      CGM.getObjCRuntime().EnumerationMutationFunction().getCallee());
   if (!EnumerationMutationFnPtr) {
     CGM.ErrorUnsupported(&S, "Obj-C fast enumeration for this runtime");
     return;
@@ -1889,7 +1893,7 @@
 /// Given a number of pointers, inform the optimizer that they're
 /// being intrinsically used up until this point in the program.
 void CodeGenFunction::EmitARCIntrinsicUse(ArrayRef<llvm::Value*> values) {
-  llvm::Constant *&fn = CGM.getObjCEntrypoints().clang_arc_use;
+  llvm::Function *&fn = CGM.getObjCEntrypoints().clang_arc_use;
   if (!fn)
     fn = CGM.getIntrinsic(llvm::Intrinsic::objc_clang_arc_use);
 
@@ -1898,8 +1902,7 @@
   EmitNounwindRuntimeCall(fn, values);
 }
 
-static void setARCRuntimeFunctionLinkage(CodeGenModule &CGM,
-                                         llvm::Constant *RTF) {
+static void setARCRuntimeFunctionLinkage(CodeGenModule &CGM, llvm::Value *RTF) {
   if (auto *F = dyn_cast<llvm::Function>(RTF)) {
     // If the target runtime doesn't naturally support ARC, emit weak
     // references to the runtime support library.  We don't really
@@ -1911,15 +1914,18 @@
   }
 }
 
+static void setARCRuntimeFunctionLinkage(CodeGenModule &CGM,
+                                         llvm::FunctionCallee RTF) {
+  setARCRuntimeFunctionLinkage(CGM, RTF.getCallee());
+}
+
 /// Perform an operation having the signature
 ///   i8* (i8*)
 /// where a null input causes a no-op and returns null.
-static llvm::Value *emitARCValueOperation(CodeGenFunction &CGF,
-                                          llvm::Value *value,
-                                          llvm::Type *returnType,
-                                          llvm::Constant *&fn,
-                                          llvm::Intrinsic::ID IntID,
-                                          bool isTailCall = false) {
+static llvm::Value *
+emitARCValueOperation(CodeGenFunction &CGF, llvm::Value *value,
+                      llvm::Type *returnType, llvm::Function *&fn,
+                      llvm::Intrinsic::ID IntID, bool isTailCall = false) {
   if (isa<llvm::ConstantPointerNull>(value))
     return value;
 
@@ -1943,9 +1949,8 @@
 
 /// Perform an operation having the following signature:
 ///   i8* (i8**)
-static llvm::Value *emitARCLoadOperation(CodeGenFunction &CGF,
-                                         Address addr,
-                                         llvm::Constant *&fn,
+static llvm::Value *emitARCLoadOperation(CodeGenFunction &CGF, Address addr,
+                                         llvm::Function *&fn,
                                          llvm::Intrinsic::ID IntID) {
   if (!fn) {
     fn = CGF.CGM.getIntrinsic(IntID);
@@ -1968,10 +1973,9 @@
 
 /// Perform an operation having the following signature:
 ///   i8* (i8**, i8*)
-static llvm::Value *emitARCStoreOperation(CodeGenFunction &CGF,
-                                          Address addr,
+static llvm::Value *emitARCStoreOperation(CodeGenFunction &CGF, Address addr,
                                           llvm::Value *value,
-                                          llvm::Constant *&fn,
+                                          llvm::Function *&fn,
                                           llvm::Intrinsic::ID IntID,
                                           bool ignored) {
   assert(addr.getElementType() == value->getType());
@@ -1996,10 +2000,8 @@
 
 /// Perform an operation having the following signature:
 ///   void (i8**, i8**)
-static void emitARCCopyOperation(CodeGenFunction &CGF,
-                                 Address dst,
-                                 Address src,
-                                 llvm::Constant *&fn,
+static void emitARCCopyOperation(CodeGenFunction &CGF, Address dst, Address src,
+                                 llvm::Function *&fn,
                                  llvm::Intrinsic::ID IntID) {
   assert(dst.getType() == src.getType());
 
@@ -2021,9 +2023,8 @@
 static llvm::Value *emitObjCValueOperation(CodeGenFunction &CGF,
                                            llvm::Value *value,
                                            llvm::Type *returnType,
-                                           llvm::Constant *&fn,
-                                           StringRef fnName,
-                                           bool MayThrow) {
+                                           llvm::FunctionCallee &fn,
+                                           StringRef fnName, bool MayThrow) {
   if (isa<llvm::ConstantPointerNull>(value))
     return value;
 
@@ -2033,7 +2034,7 @@
     fn = CGF.CGM.CreateRuntimeFunction(fnType, fnName);
 
     // We have Native ARC, so set nonlazybind attribute for performance
-    if (llvm::Function *f = dyn_cast<llvm::Function>(fn))
+    if (llvm::Function *f = dyn_cast<llvm::Function>(fn.getCallee()))
       if (fnName == "objc_retain")
         f->addFnAttr(llvm::Attribute::NonLazyBind);
   }
@@ -2176,7 +2177,7 @@
                                      ARCPreciseLifetime_t precise) {
   if (isa<llvm::ConstantPointerNull>(value)) return;
 
-  llvm::Constant *&fn = CGM.getObjCEntrypoints().objc_release;
+  llvm::Function *&fn = CGM.getObjCEntrypoints().objc_release;
   if (!fn) {
     fn = CGM.getIntrinsic(llvm::Intrinsic::objc_release);
     setARCRuntimeFunctionLinkage(CGM, fn);
@@ -2222,7 +2223,7 @@
                                                      bool ignored) {
   assert(addr.getElementType() == value->getType());
 
-  llvm::Constant *&fn = CGM.getObjCEntrypoints().objc_storeStrong;
+  llvm::Function *&fn = CGM.getObjCEntrypoints().objc_storeStrong;
   if (!fn) {
     fn = CGM.getIntrinsic(llvm::Intrinsic::objc_storeStrong);
     setARCRuntimeFunctionLinkage(CGM, fn);
@@ -2378,7 +2379,7 @@
 /// void \@objc_destroyWeak(i8** %addr)
 /// Essentially objc_storeWeak(addr, nil).
 void CodeGenFunction::EmitARCDestroyWeak(Address addr) {
-  llvm::Constant *&fn = CGM.getObjCEntrypoints().objc_destroyWeak;
+  llvm::Function *&fn = CGM.getObjCEntrypoints().objc_destroyWeak;
   if (!fn) {
     fn = CGM.getIntrinsic(llvm::Intrinsic::objc_destroyWeak);
     setARCRuntimeFunctionLinkage(CGM, fn);
@@ -2426,7 +2427,7 @@
 /// Produce the code to do a objc_autoreleasepool_push.
 ///   call i8* \@objc_autoreleasePoolPush(void)
 llvm::Value *CodeGenFunction::EmitObjCAutoreleasePoolPush() {
-  llvm::Constant *&fn = CGM.getObjCEntrypoints().objc_autoreleasePoolPush;
+  llvm::Function *&fn = CGM.getObjCEntrypoints().objc_autoreleasePoolPush;
   if (!fn) {
     fn = CGM.getIntrinsic(llvm::Intrinsic::objc_autoreleasePoolPush);
     setARCRuntimeFunctionLinkage(CGM, fn);
@@ -2442,8 +2443,8 @@
 
   if (getInvokeDest()) {
     // Call the runtime method not the intrinsic if we are handling exceptions
-    llvm::Constant *&fn =
-      CGM.getObjCEntrypoints().objc_autoreleasePoolPopInvoke;
+    llvm::FunctionCallee &fn =
+        CGM.getObjCEntrypoints().objc_autoreleasePoolPopInvoke;
     if (!fn) {
       llvm::FunctionType *fnType =
         llvm::FunctionType::get(Builder.getVoidTy(), Int8PtrTy, false);
@@ -2454,7 +2455,7 @@
     // objc_autoreleasePoolPop can throw.
     EmitRuntimeCallOrInvoke(fn, value);
   } else {
-    llvm::Constant *&fn = CGM.getObjCEntrypoints().objc_autoreleasePoolPop;
+    llvm::FunctionCallee &fn = CGM.getObjCEntrypoints().objc_autoreleasePoolPop;
     if (!fn) {
       fn = CGM.getIntrinsic(llvm::Intrinsic::objc_autoreleasePoolPop);
       setARCRuntimeFunctionLinkage(CGM, fn);
@@ -2570,17 +2571,16 @@
                                       ARCPreciseLifetime_t precise) {
   if (isa<llvm::ConstantPointerNull>(value)) return;
 
-  llvm::Constant *&fn = CGM.getObjCEntrypoints().objc_release;
+  llvm::FunctionCallee &fn =
+      CGM.getObjCEntrypoints().objc_releaseRuntimeFunction;
   if (!fn) {
-    if (!fn) {
-      llvm::FunctionType *fnType =
+    llvm::FunctionType *fnType =
         llvm::FunctionType::get(Builder.getVoidTy(), Int8PtrTy, false);
-      fn = CGM.CreateRuntimeFunction(fnType, "objc_release");
-      setARCRuntimeFunctionLinkage(CGM, fn);
-      // We have Native ARC, so set nonlazybind attribute for performance
-      if (llvm::Function *f = dyn_cast<llvm::Function>(fn))
-        f->addFnAttr(llvm::Attribute::NonLazyBind);
-    }
+    fn = CGM.CreateRuntimeFunction(fnType, "objc_release");
+    setARCRuntimeFunctionLinkage(CGM, fn);
+    // We have Native ARC, so set nonlazybind attribute for performance
+    if (llvm::Function *f = dyn_cast<llvm::Function>(fn.getCallee()))
+      f->addFnAttr(llvm::Attribute::NonLazyBind);
   }
 
   // Cast the argument to 'id'.
@@ -3389,11 +3389,10 @@
   // We just use an inline assembly.
   llvm::FunctionType *extenderType
     = llvm::FunctionType::get(VoidTy, VoidPtrTy, RequiredArgs::All);
-  llvm::Value *extender
-    = llvm::InlineAsm::get(extenderType,
-                           /* assembly */ "",
-                           /* constraints */ "r",
-                           /* side effects */ true);
+  llvm::InlineAsm *extender = llvm::InlineAsm::get(extenderType,
+                                                   /* assembly */ "",
+                                                   /* constraints */ "r",
+                                                   /* side effects */ true);
 
   object = Builder.CreateBitCast(object, VoidPtrTy);
   EmitNounwindRuntimeCall(extender, object);
@@ -3652,19 +3651,25 @@
   // CoreFoundation is linked into the final binary.
   llvm::FunctionType *FTy =
       llvm::FunctionType::get(Int32Ty, {VoidPtrTy}, false);
-  llvm::Constant *CFFunc =
+  llvm::FunctionCallee CFFunc =
       CreateRuntimeFunction(FTy, "CFBundleGetVersionNumber");
 
   llvm::FunctionType *CheckFTy = llvm::FunctionType::get(VoidTy, {}, false);
-  llvm::Function *CFLinkCheckFunc = cast<llvm::Function>(CreateBuiltinFunction(
-      CheckFTy, "__clang_at_available_requires_core_foundation_framework"));
-  CFLinkCheckFunc->setLinkage(llvm::GlobalValue::LinkOnceAnyLinkage);
-  CFLinkCheckFunc->setVisibility(llvm::GlobalValue::HiddenVisibility);
-  CodeGenFunction CGF(*this);
-  CGF.Builder.SetInsertPoint(CGF.createBasicBlock("", CFLinkCheckFunc));
-  CGF.EmitNounwindRuntimeCall(CFFunc, llvm::Constant::getNullValue(VoidPtrTy));
-  CGF.Builder.CreateUnreachable();
-  addCompilerUsedGlobal(CFLinkCheckFunc);
+  llvm::FunctionCallee CFLinkCheckFuncRef = CreateRuntimeFunction(
+      CheckFTy, "__clang_at_available_requires_core_foundation_framework",
+      llvm::AttributeList(), /*IsLocal=*/true);
+  llvm::Function *CFLinkCheckFunc =
+      cast<llvm::Function>(CFLinkCheckFuncRef.getCallee()->stripPointerCasts());
+  if (CFLinkCheckFunc->empty()) {
+    CFLinkCheckFunc->setLinkage(llvm::GlobalValue::LinkOnceAnyLinkage);
+    CFLinkCheckFunc->setVisibility(llvm::GlobalValue::HiddenVisibility);
+    CodeGenFunction CGF(*this);
+    CGF.Builder.SetInsertPoint(CGF.createBasicBlock("", CFLinkCheckFunc));
+    CGF.EmitNounwindRuntimeCall(CFFunc,
+                                llvm::Constant::getNullValue(VoidPtrTy));
+    CGF.Builder.CreateUnreachable();
+    addCompilerUsedGlobal(CFLinkCheckFunc);
+  }
 }
 
 CGObjCRuntime::~CGObjCRuntime() {}
diff --git a/clang/lib/CodeGen/CGObjCGNU.cpp b/clang/lib/CodeGen/CGObjCGNU.cpp
--- a/clang/lib/CodeGen/CGObjCGNU.cpp
+++ b/clang/lib/CodeGen/CGObjCGNU.cpp
@@ -58,7 +58,7 @@
   CodeGenModule *CGM;
   llvm::FunctionType *FTy;
   const char *FunctionName;
-  llvm::Constant *Function;
+  llvm::FunctionCallee Function;
 
 public:
   /// Constructor leaves this class uninitialized, because it is intended to
@@ -88,7 +88,7 @@
 
   /// Overloaded cast operator, allows the class to be implicitly cast to an
   /// LLVM constant.
-  operator llvm::Constant *() {
+  operator llvm::FunctionCallee() {
     if (!Function) {
       if (!FunctionName)
         return nullptr;
@@ -96,9 +96,6 @@
     }
     return Function;
   }
-  operator llvm::Function *() {
-    return cast<llvm::Function>((llvm::Constant *)*this);
-  }
 };
 
 
@@ -612,15 +609,15 @@
                                    const ObjCProtocolDecl *PD) override;
   void GenerateProtocol(const ObjCProtocolDecl *PD) override;
   llvm::Function *ModuleInitFunction() override;
-  llvm::Constant *GetPropertyGetFunction() override;
-  llvm::Constant *GetPropertySetFunction() override;
-  llvm::Constant *GetOptimizedPropertySetFunction(bool atomic,
-                                                  bool copy) override;
-  llvm::Constant *GetSetStructFunction() override;
-  llvm::Constant *GetGetStructFunction() override;
-  llvm::Constant *GetCppAtomicObjectGetFunction() override;
-  llvm::Constant *GetCppAtomicObjectSetFunction() override;
-  llvm::Constant *EnumerationMutationFunction() override;
+  llvm::FunctionCallee GetPropertyGetFunction() override;
+  llvm::FunctionCallee GetPropertySetFunction() override;
+  llvm::FunctionCallee GetOptimizedPropertySetFunction(bool atomic,
+                                                       bool copy) override;
+  llvm::FunctionCallee GetSetStructFunction() override;
+  llvm::FunctionCallee GetGetStructFunction() override;
+  llvm::FunctionCallee GetCppAtomicObjectGetFunction() override;
+  llvm::FunctionCallee GetCppAtomicObjectSetFunction() override;
+  llvm::FunctionCallee EnumerationMutationFunction() override;
 
   void EmitTryStmt(CodeGenFunction &CGF,
                    const ObjCAtTryStmt &S) override;
@@ -748,7 +745,7 @@
                            llvm::Value *cmd, llvm::MDNode *node,
                            MessageSendInfo &MSI) override {
       CGBuilderTy &Builder = CGF.Builder;
-      llvm::Function *LookupFn = SlotLookupFn;
+      llvm::FunctionCallee LookupFn = SlotLookupFn;
 
       // Store the receiver on the stack so that we can reload it later
       Address ReceiverPtr =
@@ -764,7 +761,8 @@
       }
 
       // The lookup function is guaranteed not to capture the receiver pointer.
-      LookupFn->addParamAttr(0, llvm::Attribute::NoCapture);
+      if (auto *LookupFn2 = dyn_cast<llvm::Function>(LookupFn.getCallee()))
+        LookupFn2->addParamAttr(0, llvm::Attribute::NoCapture);
 
       llvm::Value *args[] = {
               EnforceType(Builder, ReceiverPtr.getPointer(), PtrToIdTy),
@@ -856,7 +854,7 @@
                                 PtrTy, PtrTy);
     }
 
-    llvm::Constant *GetCppAtomicObjectGetFunction() override {
+    llvm::FunctionCallee GetCppAtomicObjectGetFunction() override {
       // The optimised functions were added in version 1.7 of the GNUstep
       // runtime.
       assert (CGM.getLangOpts().ObjCRuntime.getVersion() >=
@@ -864,7 +862,7 @@
       return CxxAtomicObjectGetFn;
     }
 
-    llvm::Constant *GetCppAtomicObjectSetFunction() override {
+    llvm::FunctionCallee GetCppAtomicObjectSetFunction() override {
       // The optimised functions were added in version 1.7 of the GNUstep
       // runtime.
       assert (CGM.getLangOpts().ObjCRuntime.getVersion() >=
@@ -872,8 +870,8 @@
       return CxxAtomicObjectSetFn;
     }
 
-    llvm::Constant *GetOptimizedPropertySetFunction(bool atomic,
-                                                    bool copy) override {
+    llvm::FunctionCallee GetOptimizedPropertySetFunction(bool atomic,
+                                                         bool copy) override {
       // The optimised property functions omit the GC check, and so are not
       // safe to use in GC mode.  The standard functions are fast in GC mode,
       // so there is less advantage in using them.
@@ -951,7 +949,7 @@
       Types.push_back(Arg->getType());
     llvm::FunctionType *FT = llvm::FunctionType::get(B.getVoidTy(), Types,
         false);
-    llvm::Value *Fn = CGM.CreateRuntimeFunction(FT, FunctionName);
+    llvm::FunctionCallee Fn = CGM.CreateRuntimeFunction(FT, FunctionName);
     B.CreateCall(Fn, Args);
   }
 
@@ -2169,9 +2167,8 @@
   if (!isWeak)
     EmitClassRef(Name);
 
-  llvm::Constant *ClassLookupFn =
-    CGM.CreateRuntimeFunction(llvm::FunctionType::get(IdTy, PtrToInt8Ty, true),
-                              "objc_lookup_class");
+  llvm::FunctionCallee ClassLookupFn = CGM.CreateRuntimeFunction(
+      llvm::FunctionType::get(IdTy, PtrToInt8Ty, true), "objc_lookup_class");
   return CGF.EmitNounwindRuntimeCall(ClassLookupFn, ClassName);
 }
 
@@ -2427,7 +2424,7 @@
     ReceiverClass = EnforceType(Builder, ReceiverClass, IdTy);
   } else {
     if (isCategoryImpl) {
-      llvm::Constant *classLookupFunction = nullptr;
+      llvm::FunctionCallee classLookupFunction = nullptr;
       if (IsClassMessage)  {
         classLookupFunction = CGM.CreateRuntimeFunction(llvm::FunctionType::get(
               IdTy, PtrTy, true), "objc_get_meta_class");
@@ -2590,16 +2587,21 @@
     case CodeGenOptions::Mixed:
     case CodeGenOptions::NonLegacy:
       if (CGM.ReturnTypeUsesFPRet(ResultType)) {
-        imp = CGM.CreateRuntimeFunction(llvm::FunctionType::get(IdTy, IdTy, true),
-                                  "objc_msgSend_fpret");
+        imp =
+            CGM.CreateRuntimeFunction(llvm::FunctionType::get(IdTy, IdTy, true),
+                                      "objc_msgSend_fpret")
+                .getCallee();
       } else if (CGM.ReturnTypeUsesSRet(MSI.CallInfo)) {
         // The actual types here don't matter - we're going to bitcast the
         // function anyway
-        imp = CGM.CreateRuntimeFunction(llvm::FunctionType::get(IdTy, IdTy, true),
-                                  "objc_msgSend_stret");
+        imp =
+            CGM.CreateRuntimeFunction(llvm::FunctionType::get(IdTy, IdTy, true),
+                                      "objc_msgSend_stret")
+                .getCallee();
       } else {
-        imp = CGM.CreateRuntimeFunction(llvm::FunctionType::get(IdTy, IdTy, true),
-                                  "objc_msgSend");
+        imp = CGM.CreateRuntimeFunction(
+                     llvm::FunctionType::get(IdTy, IdTy, true), "objc_msgSend")
+                  .getCallee();
       }
   }
 
@@ -3692,7 +3694,8 @@
 
   llvm::FunctionType *FT =
     llvm::FunctionType::get(Builder.getVoidTy(), module->getType(), true);
-  llvm::Value *Register = CGM.CreateRuntimeFunction(FT, "__objc_exec_class");
+  llvm::FunctionCallee Register =
+      CGM.CreateRuntimeFunction(FT, "__objc_exec_class");
   Builder.CreateCall(Register, module);
 
   if (!ClassAliases.empty()) {
@@ -3761,36 +3764,36 @@
   return Method;
 }
 
-llvm::Constant *CGObjCGNU::GetPropertyGetFunction() {
+llvm::FunctionCallee CGObjCGNU::GetPropertyGetFunction() {
   return GetPropertyFn;
 }
 
-llvm::Constant *CGObjCGNU::GetPropertySetFunction() {
+llvm::FunctionCallee CGObjCGNU::GetPropertySetFunction() {
   return SetPropertyFn;
 }
 
-llvm::Constant *CGObjCGNU::GetOptimizedPropertySetFunction(bool atomic,
-                                                           bool copy) {
+llvm::FunctionCallee CGObjCGNU::GetOptimizedPropertySetFunction(bool atomic,
+                                                                bool copy) {
   return nullptr;
 }
 
-llvm::Constant *CGObjCGNU::GetGetStructFunction() {
+llvm::FunctionCallee CGObjCGNU::GetGetStructFunction() {
   return GetStructPropertyFn;
 }
 
-llvm::Constant *CGObjCGNU::GetSetStructFunction() {
+llvm::FunctionCallee CGObjCGNU::GetSetStructFunction() {
   return SetStructPropertyFn;
 }
 
-llvm::Constant *CGObjCGNU::GetCppAtomicObjectGetFunction() {
+llvm::FunctionCallee CGObjCGNU::GetCppAtomicObjectGetFunction() {
   return nullptr;
 }
 
-llvm::Constant *CGObjCGNU::GetCppAtomicObjectSetFunction() {
+llvm::FunctionCallee CGObjCGNU::GetCppAtomicObjectSetFunction() {
   return nullptr;
 }
 
-llvm::Constant *CGObjCGNU::EnumerationMutationFunction() {
+llvm::FunctionCallee CGObjCGNU::EnumerationMutationFunction() {
   return EnumerationMutationFn;
 }
 
@@ -3857,8 +3860,7 @@
                                           Address AddrWeakObj) {
   CGBuilderTy &B = CGF.Builder;
   AddrWeakObj = EnforceType(B, AddrWeakObj, PtrToIdTy);
-  return B.CreateCall(WeakReadFn.getType(), WeakReadFn,
-                      AddrWeakObj.getPointer());
+  return B.CreateCall(WeakReadFn, AddrWeakObj.getPointer());
 }
 
 void CGObjCGNU::EmitObjCWeakAssign(CodeGenFunction &CGF,
@@ -3866,8 +3868,7 @@
   CGBuilderTy &B = CGF.Builder;
   src = EnforceType(B, src, IdTy);
   dst = EnforceType(B, dst, PtrToIdTy);
-  B.CreateCall(WeakAssignFn.getType(), WeakAssignFn,
-               {src, dst.getPointer()});
+  B.CreateCall(WeakAssignFn, {src, dst.getPointer()});
 }
 
 void CGObjCGNU::EmitObjCGlobalAssign(CodeGenFunction &CGF,
@@ -3878,8 +3879,7 @@
   dst = EnforceType(B, dst, PtrToIdTy);
   // FIXME. Add threadloca assign API
   assert(!threadlocal && "EmitObjCGlobalAssign - Threal Local API NYI");
-  B.CreateCall(GlobalAssignFn.getType(), GlobalAssignFn,
-               {src, dst.getPointer()});
+  B.CreateCall(GlobalAssignFn, {src, dst.getPointer()});
 }
 
 void CGObjCGNU::EmitObjCIvarAssign(CodeGenFunction &CGF,
@@ -3888,8 +3888,7 @@
   CGBuilderTy &B = CGF.Builder;
   src = EnforceType(B, src, IdTy);
   dst = EnforceType(B, dst, IdTy);
-  B.CreateCall(IvarAssignFn.getType(), IvarAssignFn,
-               {src, dst.getPointer(), ivarOffset});
+  B.CreateCall(IvarAssignFn, {src, dst.getPointer(), ivarOffset});
 }
 
 void CGObjCGNU::EmitObjCStrongCastAssign(CodeGenFunction &CGF,
@@ -3897,8 +3896,7 @@
   CGBuilderTy &B = CGF.Builder;
   src = EnforceType(B, src, IdTy);
   dst = EnforceType(B, dst, PtrToIdTy);
-  B.CreateCall(StrongCastAssignFn.getType(), StrongCastAssignFn,
-               {src, dst.getPointer()});
+  B.CreateCall(StrongCastAssignFn, {src, dst.getPointer()});
 }
 
 void CGObjCGNU::EmitGCMemmoveCollectable(CodeGenFunction &CGF,
@@ -3909,8 +3907,7 @@
   DestPtr = EnforceType(B, DestPtr, PtrTy);
   SrcPtr = EnforceType(B, SrcPtr, PtrTy);
 
-  B.CreateCall(MemMoveFn.getType(), MemMoveFn,
-               {DestPtr.getPointer(), SrcPtr.getPointer(), Size});
+  B.CreateCall(MemMoveFn, {DestPtr.getPointer(), SrcPtr.getPointer(), Size});
 }
 
 llvm::GlobalVariable *CGObjCGNU::ObjCIvarOffsetVariable(
diff --git a/clang/lib/CodeGen/CGObjCMac.cpp b/clang/lib/CodeGen/CGObjCMac.cpp
--- a/clang/lib/CodeGen/CGObjCMac.cpp
+++ b/clang/lib/CodeGen/CGObjCMac.cpp
@@ -59,7 +59,7 @@
   ///
   /// The default messenger, used for sends whose ABI is unchanged from
   /// the all-integer/pointer case.
-  llvm::Constant *getMessageSendFn() const {
+  llvm::FunctionCallee getMessageSendFn() const {
     // Add the non-lazy-bind attribute, since objc_msgSend is likely to
     // be called a lot.
     llvm::Type *params[] = { ObjectPtrTy, SelectorPtrTy };
@@ -75,12 +75,11 @@
   /// 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::FunctionCallee 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, ...)
@@ -88,12 +87,11 @@
   /// 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::FunctionCallee 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, ...)
@@ -101,7 +99,7 @@
   /// 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::FunctionCallee getMessageSendFp2retFn() const {
     llvm::Type *params[] = { ObjectPtrTy, SelectorPtrTy };
     llvm::Type *longDoubleType = llvm::Type::getX86_FP80Ty(VMContext);
     llvm::Type *resultType =
@@ -117,7 +115,7 @@
   /// 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::FunctionCallee getMessageSendSuperFn() const {
     llvm::Type *params[] = { SuperPtrTy, SelectorPtrTy };
     return CGM.CreateRuntimeFunction(llvm::FunctionType::get(ObjectPtrTy,
                                                              params, true),
@@ -128,7 +126,7 @@
   ///
   /// A slightly different messenger used for super calls.  The class
   /// passed is the current class.
-  llvm::Constant *getMessageSendSuperFn2() const {
+  llvm::FunctionCallee getMessageSendSuperFn2() const {
     llvm::Type *params[] = { SuperPtrTy, SelectorPtrTy };
     return CGM.CreateRuntimeFunction(llvm::FunctionType::get(ObjectPtrTy,
                                                              params, true),
@@ -139,7 +137,7 @@
   ///                              SEL op, ...)
   ///
   /// The messenger used for super calls which return an aggregate indirectly.
-  llvm::Constant *getMessageSendSuperStretFn() const {
+  llvm::FunctionCallee getMessageSendSuperStretFn() const {
     llvm::Type *params[] = { Int8PtrTy, SuperPtrTy, SelectorPtrTy };
     return CGM.CreateRuntimeFunction(
       llvm::FunctionType::get(CGM.VoidTy, params, true),
@@ -150,19 +148,19 @@
   ///                               SEL op, ...)
   ///
   /// objc_msgSendSuper_stret with the super2 semantics.
-  llvm::Constant *getMessageSendSuperStretFn2() const {
+  llvm::FunctionCallee 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 {
+  llvm::FunctionCallee getMessageSendSuperFpretFn() const {
     // There is no objc_msgSendSuper_fpret? How can that work?
     return getMessageSendSuperFn();
   }
 
-  llvm::Constant *getMessageSendSuperFpretFn2() const {
+  llvm::FunctionCallee getMessageSendSuperFpretFn2() const {
     // There is no objc_msgSendSuper_fpret? How can that work?
     return getMessageSendSuperFn2();
   }
@@ -231,7 +229,7 @@
   /// CachePtrTy - LLVM type for struct objc_cache *.
   llvm::PointerType *CachePtrTy;
 
-  llvm::Constant *getGetPropertyFn() {
+  llvm::FunctionCallee getGetPropertyFn() {
     CodeGen::CodeGenTypes &Types = CGM.getTypes();
     ASTContext &Ctx = CGM.getContext();
     // id objc_getProperty (id, SEL, ptrdiff_t, bool)
@@ -246,7 +244,7 @@
     return CGM.CreateRuntimeFunction(FTy, "objc_getProperty");
   }
 
-  llvm::Constant *getSetPropertyFn() {
+  llvm::FunctionCallee getSetPropertyFn() {
     CodeGen::CodeGenTypes &Types = CGM.getTypes();
     ASTContext &Ctx = CGM.getContext();
     // void objc_setProperty (id, SEL, ptrdiff_t, id, bool, bool)
@@ -265,7 +263,7 @@
     return CGM.CreateRuntimeFunction(FTy, "objc_setProperty");
   }
 
-  llvm::Constant *getOptimizedSetPropertyFn(bool atomic, bool copy) {
+  llvm::FunctionCallee getOptimizedSetPropertyFn(bool atomic, bool copy) {
     CodeGen::CodeGenTypes &Types = CGM.getTypes();
     ASTContext &Ctx = CGM.getContext();
     // void objc_setProperty_atomic(id self, SEL _cmd,
@@ -300,7 +298,7 @@
     return CGM.CreateRuntimeFunction(FTy, name);
   }
 
-  llvm::Constant *getCopyStructFn() {
+  llvm::FunctionCallee getCopyStructFn() {
     CodeGen::CodeGenTypes &Types = CGM.getTypes();
     ASTContext &Ctx = CGM.getContext();
     // void objc_copyStruct (void *, const void *, size_t, bool, bool)
@@ -320,7 +318,7 @@
   /// void objc_copyCppObjectAtomic(
   ///         void *dest, const void *src,
   ///         void (*copyHelper) (void *dest, const void *source));
-  llvm::Constant *getCppAtomicObjectFunction() {
+  llvm::FunctionCallee getCppAtomicObjectFunction() {
     CodeGen::CodeGenTypes &Types = CGM.getTypes();
     ASTContext &Ctx = CGM.getContext();
     /// void objc_copyCppObjectAtomic(void *dest, const void *src, void *helper);
@@ -334,7 +332,7 @@
     return CGM.CreateRuntimeFunction(FTy, "objc_copyCppObjectAtomic");
   }
 
-  llvm::Constant *getEnumerationMutationFn() {
+  llvm::FunctionCallee getEnumerationMutationFn() {
     CodeGen::CodeGenTypes &Types = CGM.getTypes();
     ASTContext &Ctx = CGM.getContext();
     // void objc_enumerationMutation (id)
@@ -346,7 +344,7 @@
     return CGM.CreateRuntimeFunction(FTy, "objc_enumerationMutation");
   }
 
-  llvm::Constant *getLookUpClassFn() {
+  llvm::FunctionCallee getLookUpClassFn() {
     CodeGen::CodeGenTypes &Types = CGM.getTypes();
     ASTContext &Ctx = CGM.getContext();
     // Class objc_lookUpClass (const char *)
@@ -361,7 +359,7 @@
   }
 
   /// GcReadWeakFn -- LLVM objc_read_weak (id *src) function.
-  llvm::Constant *getGcReadWeakFn() {
+  llvm::FunctionCallee getGcReadWeakFn() {
     // id objc_read_weak (id *)
     llvm::Type *args[] = { ObjectPtrTy->getPointerTo() };
     llvm::FunctionType *FTy =
@@ -370,7 +368,7 @@
   }
 
   /// GcAssignWeakFn -- LLVM objc_assign_weak function.
-  llvm::Constant *getGcAssignWeakFn() {
+  llvm::FunctionCallee getGcAssignWeakFn() {
     // id objc_assign_weak (id, id *)
     llvm::Type *args[] = { ObjectPtrTy, ObjectPtrTy->getPointerTo() };
     llvm::FunctionType *FTy =
@@ -379,7 +377,7 @@
   }
 
   /// GcAssignGlobalFn -- LLVM objc_assign_global function.
-  llvm::Constant *getGcAssignGlobalFn() {
+  llvm::FunctionCallee getGcAssignGlobalFn() {
     // id objc_assign_global(id, id *)
     llvm::Type *args[] = { ObjectPtrTy, ObjectPtrTy->getPointerTo() };
     llvm::FunctionType *FTy =
@@ -388,7 +386,7 @@
   }
 
   /// GcAssignThreadLocalFn -- LLVM objc_assign_threadlocal function.
-  llvm::Constant *getGcAssignThreadLocalFn() {
+  llvm::FunctionCallee getGcAssignThreadLocalFn() {
     // id objc_assign_threadlocal(id src, id * dest)
     llvm::Type *args[] = { ObjectPtrTy, ObjectPtrTy->getPointerTo() };
     llvm::FunctionType *FTy =
@@ -397,7 +395,7 @@
   }
 
   /// GcAssignIvarFn -- LLVM objc_assign_ivar function.
-  llvm::Constant *getGcAssignIvarFn() {
+  llvm::FunctionCallee getGcAssignIvarFn() {
     // id objc_assign_ivar(id, id *, ptrdiff_t)
     llvm::Type *args[] = { ObjectPtrTy, ObjectPtrTy->getPointerTo(),
                            CGM.PtrDiffTy };
@@ -407,7 +405,7 @@
   }
 
   /// GcMemmoveCollectableFn -- LLVM objc_memmove_collectable function.
-  llvm::Constant *GcMemmoveCollectableFn() {
+  llvm::FunctionCallee 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);
@@ -415,7 +413,7 @@
   }
 
   /// GcAssignStrongCastFn -- LLVM objc_assign_strongCast function.
-  llvm::Constant *getGcAssignStrongCastFn() {
+  llvm::FunctionCallee getGcAssignStrongCastFn() {
     // id objc_assign_strongCast(id, id *)
     llvm::Type *args[] = { ObjectPtrTy, ObjectPtrTy->getPointerTo() };
     llvm::FunctionType *FTy =
@@ -424,7 +422,7 @@
   }
 
   /// ExceptionThrowFn - LLVM objc_exception_throw function.
-  llvm::Constant *getExceptionThrowFn() {
+  llvm::FunctionCallee getExceptionThrowFn() {
     // void objc_exception_throw(id)
     llvm::Type *args[] = { ObjectPtrTy };
     llvm::FunctionType *FTy =
@@ -433,14 +431,14 @@
   }
 
   /// ExceptionRethrowFn - LLVM objc_exception_rethrow function.
-  llvm::Constant *getExceptionRethrowFn() {
+  llvm::FunctionCallee 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() {
+  llvm::FunctionCallee getSyncEnterFn() {
     // int objc_sync_enter (id)
     llvm::Type *args[] = { ObjectPtrTy };
     llvm::FunctionType *FTy =
@@ -449,7 +447,7 @@
   }
 
   /// SyncExitFn - LLVM object_sync_exit function.
-  llvm::Constant *getSyncExitFn() {
+  llvm::FunctionCallee getSyncExitFn() {
     // int objc_sync_exit (id)
     llvm::Type *args[] = { ObjectPtrTy };
     llvm::FunctionType *FTy =
@@ -457,35 +455,35 @@
     return CGM.CreateRuntimeFunction(FTy, "objc_sync_exit");
   }
 
-  llvm::Constant *getSendFn(bool IsSuper) const {
+  llvm::FunctionCallee getSendFn(bool IsSuper) const {
     return IsSuper ? getMessageSendSuperFn() : getMessageSendFn();
   }
 
-  llvm::Constant *getSendFn2(bool IsSuper) const {
+  llvm::FunctionCallee getSendFn2(bool IsSuper) const {
     return IsSuper ? getMessageSendSuperFn2() : getMessageSendFn();
   }
 
-  llvm::Constant *getSendStretFn(bool IsSuper) const {
+  llvm::FunctionCallee getSendStretFn(bool IsSuper) const {
     return IsSuper ? getMessageSendSuperStretFn() : getMessageSendStretFn();
   }
 
-  llvm::Constant *getSendStretFn2(bool IsSuper) const {
+  llvm::FunctionCallee getSendStretFn2(bool IsSuper) const {
     return IsSuper ? getMessageSendSuperStretFn2() : getMessageSendStretFn();
   }
 
-  llvm::Constant *getSendFpretFn(bool IsSuper) const {
+  llvm::FunctionCallee getSendFpretFn(bool IsSuper) const {
     return IsSuper ? getMessageSendSuperFpretFn() : getMessageSendFpretFn();
   }
 
-  llvm::Constant *getSendFpretFn2(bool IsSuper) const {
+  llvm::FunctionCallee getSendFpretFn2(bool IsSuper) const {
     return IsSuper ? getMessageSendSuperFpretFn2() : getMessageSendFpretFn();
   }
 
-  llvm::Constant *getSendFp2retFn(bool IsSuper) const {
+  llvm::FunctionCallee getSendFp2retFn(bool IsSuper) const {
     return IsSuper ? getMessageSendSuperFn() : getMessageSendFp2retFn();
   }
 
-  llvm::Constant *getSendFp2RetFn2(bool IsSuper) const {
+  llvm::FunctionCallee getSendFp2RetFn2(bool IsSuper) const {
     return IsSuper ? getMessageSendSuperFn2() : getMessageSendFp2retFn();
   }
 
@@ -551,7 +549,7 @@
   llvm::StructType *ExceptionDataTy;
 
   /// ExceptionTryEnterFn - LLVM objc_exception_try_enter function.
-  llvm::Constant *getExceptionTryEnterFn() {
+  llvm::FunctionCallee getExceptionTryEnterFn() {
     llvm::Type *params[] = { ExceptionDataTy->getPointerTo() };
     return CGM.CreateRuntimeFunction(
       llvm::FunctionType::get(CGM.VoidTy, params, false),
@@ -559,7 +557,7 @@
   }
 
   /// ExceptionTryExitFn - LLVM objc_exception_try_exit function.
-  llvm::Constant *getExceptionTryExitFn() {
+  llvm::FunctionCallee getExceptionTryExitFn() {
     llvm::Type *params[] = { ExceptionDataTy->getPointerTo() };
     return CGM.CreateRuntimeFunction(
       llvm::FunctionType::get(CGM.VoidTy, params, false),
@@ -567,7 +565,7 @@
   }
 
   /// ExceptionExtractFn - LLVM objc_exception_extract function.
-  llvm::Constant *getExceptionExtractFn() {
+  llvm::FunctionCallee getExceptionExtractFn() {
     llvm::Type *params[] = { ExceptionDataTy->getPointerTo() };
     return CGM.CreateRuntimeFunction(llvm::FunctionType::get(ObjectPtrTy,
                                                              params, false),
@@ -575,7 +573,7 @@
   }
 
   /// ExceptionMatchFn - LLVM objc_exception_match function.
-  llvm::Constant *getExceptionMatchFn() {
+  llvm::FunctionCallee getExceptionMatchFn() {
     llvm::Type *params[] = { ClassPtrTy, ObjectPtrTy };
     return CGM.CreateRuntimeFunction(
       llvm::FunctionType::get(CGM.Int32Ty, params, false),
@@ -583,7 +581,7 @@
   }
 
   /// SetJmpFn - LLVM _setjmp function.
-  llvm::Constant *getSetJmpFn() {
+  llvm::FunctionCallee getSetJmpFn() {
     // This is specifically the prototype for x86.
     llvm::Type *params[] = { CGM.Int32Ty->getPointerTo() };
     return CGM.CreateRuntimeFunction(
@@ -669,7 +667,7 @@
   // SuperMessageRefPtrTy - LLVM for struct _super_message_ref_t*
   llvm::PointerType *SuperMessageRefPtrTy;
 
-  llvm::Constant *getMessageSendFixupFn() {
+  llvm::FunctionCallee getMessageSendFixupFn() {
     // id objc_msgSend_fixup(id, struct message_ref_t*, ...)
     llvm::Type *params[] = { ObjectPtrTy, MessageRefPtrTy };
     return CGM.CreateRuntimeFunction(llvm::FunctionType::get(ObjectPtrTy,
@@ -677,7 +675,7 @@
                                      "objc_msgSend_fixup");
   }
 
-  llvm::Constant *getMessageSendFpretFixupFn() {
+  llvm::FunctionCallee getMessageSendFpretFixupFn() {
     // id objc_msgSend_fpret_fixup(id, struct message_ref_t*, ...)
     llvm::Type *params[] = { ObjectPtrTy, MessageRefPtrTy };
     return CGM.CreateRuntimeFunction(llvm::FunctionType::get(ObjectPtrTy,
@@ -685,7 +683,7 @@
                                      "objc_msgSend_fpret_fixup");
   }
 
-  llvm::Constant *getMessageSendStretFixupFn() {
+  llvm::FunctionCallee getMessageSendStretFixupFn() {
     // id objc_msgSend_stret_fixup(id, struct message_ref_t*, ...)
     llvm::Type *params[] = { ObjectPtrTy, MessageRefPtrTy };
     return CGM.CreateRuntimeFunction(llvm::FunctionType::get(ObjectPtrTy,
@@ -693,7 +691,7 @@
                                      "objc_msgSend_stret_fixup");
   }
 
-  llvm::Constant *getMessageSendSuper2FixupFn() {
+  llvm::FunctionCallee getMessageSendSuper2FixupFn() {
     // id objc_msgSendSuper2_fixup (struct objc_super *,
     //                              struct _super_message_ref_t*, ...)
     llvm::Type *params[] = { SuperPtrTy, SuperMessageRefPtrTy };
@@ -702,7 +700,7 @@
                                       "objc_msgSendSuper2_fixup");
   }
 
-  llvm::Constant *getMessageSendSuper2StretFixupFn() {
+  llvm::FunctionCallee getMessageSendSuper2StretFixupFn() {
     // id objc_msgSendSuper2_stret_fixup(struct objc_super *,
     //                                   struct _super_message_ref_t*, ...)
     llvm::Type *params[] = { SuperPtrTy, SuperMessageRefPtrTy };
@@ -711,13 +709,12 @@
                                       "objc_msgSendSuper2_stret_fixup");
   }
 
-  llvm::Constant *getObjCEndCatchFn() {
+  llvm::FunctionCallee getObjCEndCatchFn() {
     return CGM.CreateRuntimeFunction(llvm::FunctionType::get(CGM.VoidTy, false),
                                      "objc_end_catch");
-
   }
 
-  llvm::Constant *getObjCBeginCatchFn() {
+  llvm::FunctionCallee getObjCBeginCatchFn() {
     llvm::Type *params[] = { Int8PtrTy };
     return CGM.CreateRuntimeFunction(llvm::FunctionType::get(Int8PtrTy,
                                                              params, false),
@@ -1323,15 +1320,15 @@
   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;
+  llvm::FunctionCallee GetPropertyGetFunction() override;
+  llvm::FunctionCallee GetPropertySetFunction() override;
+  llvm::FunctionCallee GetOptimizedPropertySetFunction(bool atomic,
+                                                       bool copy) override;
+  llvm::FunctionCallee GetGetStructFunction() override;
+  llvm::FunctionCallee GetSetStructFunction() override;
+  llvm::FunctionCallee GetCppAtomicObjectGetFunction() override;
+  llvm::FunctionCallee GetCppAtomicObjectSetFunction() override;
+  llvm::FunctionCallee EnumerationMutationFunction() override;
 
   void EmitTryStmt(CodeGen::CodeGenFunction &CGF,
                    const ObjCAtTryStmt &S) override;
@@ -1605,35 +1602,35 @@
 
   llvm::Constant *GetEHType(QualType T) override;
 
-  llvm::Constant *GetPropertyGetFunction() override {
+  llvm::FunctionCallee GetPropertyGetFunction() override {
     return ObjCTypes.getGetPropertyFn();
   }
-  llvm::Constant *GetPropertySetFunction() override {
+  llvm::FunctionCallee GetPropertySetFunction() override {
     return ObjCTypes.getSetPropertyFn();
   }
 
-  llvm::Constant *GetOptimizedPropertySetFunction(bool atomic,
-                                                  bool copy) override {
+  llvm::FunctionCallee GetOptimizedPropertySetFunction(bool atomic,
+                                                       bool copy) override {
     return ObjCTypes.getOptimizedSetPropertyFn(atomic, copy);
   }
 
-  llvm::Constant *GetSetStructFunction() override {
+  llvm::FunctionCallee GetSetStructFunction() override {
     return ObjCTypes.getCopyStructFn();
   }
 
-  llvm::Constant *GetGetStructFunction() override {
+  llvm::FunctionCallee GetGetStructFunction() override {
     return ObjCTypes.getCopyStructFn();
   }
 
-  llvm::Constant *GetCppAtomicObjectSetFunction() override {
+  llvm::FunctionCallee GetCppAtomicObjectSetFunction() override {
     return ObjCTypes.getCppAtomicObjectFunction();
   }
 
-  llvm::Constant *GetCppAtomicObjectGetFunction() override {
+  llvm::FunctionCallee GetCppAtomicObjectGetFunction() override {
     return ObjCTypes.getCppAtomicObjectFunction();
   }
 
-  llvm::Constant *EnumerationMutationFunction() override {
+  llvm::FunctionCallee EnumerationMutationFunction() override {
     return ObjCTypes.getEnumerationMutationFn();
   }
 
@@ -2136,7 +2133,7 @@
 
   bool RequiresNullCheck = false;
 
-  llvm::Constant *Fn = nullptr;
+  llvm::FunctionCallee Fn = nullptr;
   if (CGM.ReturnSlotInterferesWithArgs(MSI.CallInfo)) {
     if (ReceiverCanBeNull) RequiresNullCheck = true;
     Fn = (ObjCABI == 2) ?  ObjCTypes.getSendStretFn2(IsSuper)
@@ -2156,6 +2153,10 @@
       : ObjCTypes.getSendFn(IsSuper);
   }
 
+  // Cast function to proper signature
+  llvm::Constant *BitcastFn = cast<llvm::Constant>(
+      CGF.Builder.CreateBitCast(Fn.getCallee(), MSI.MessengerType));
+
   // We don't need to emit a null check to zero out an indirect result if the
   // result is ignored.
   if (Return.isUnused())
@@ -2177,8 +2178,7 @@
   }
 
   llvm::CallBase *CallSite;
-  Fn = llvm::ConstantExpr::getBitCast(Fn, MSI.MessengerType);
-  CGCallee Callee = CGCallee::forDirect(Fn);
+  CGCallee Callee = CGCallee::forDirect(BitcastFn);
   RValue rvalue = CGF.EmitCall(MSI.CallInfo, Callee, Return, ActualArgs,
                                &CallSite);
 
@@ -2961,7 +2961,7 @@
                CodeGenFunction &CGF,
                const ObjCInterfaceDecl *ID,
                ObjCCommonTypesHelper &ObjCTypes) {
-  llvm::Constant *lookUpClassFn = ObjCTypes.getLookUpClassFn();
+  llvm::FunctionCallee lookUpClassFn = ObjCTypes.getLookUpClassFn();
 
   llvm::Value *className =
       CGF.CGM.GetAddrOfConstantCString(ID->getObjCRuntimeNameAsString())
@@ -4018,36 +4018,36 @@
   return nullptr;
 }
 
-llvm::Constant *CGObjCMac::GetPropertyGetFunction() {
+llvm::FunctionCallee CGObjCMac::GetPropertyGetFunction() {
   return ObjCTypes.getGetPropertyFn();
 }
 
-llvm::Constant *CGObjCMac::GetPropertySetFunction() {
+llvm::FunctionCallee CGObjCMac::GetPropertySetFunction() {
   return ObjCTypes.getSetPropertyFn();
 }
 
-llvm::Constant *CGObjCMac::GetOptimizedPropertySetFunction(bool atomic,
-                                                           bool copy) {
+llvm::FunctionCallee CGObjCMac::GetOptimizedPropertySetFunction(bool atomic,
+                                                                bool copy) {
   return ObjCTypes.getOptimizedSetPropertyFn(atomic, copy);
 }
 
-llvm::Constant *CGObjCMac::GetGetStructFunction() {
+llvm::FunctionCallee CGObjCMac::GetGetStructFunction() {
   return ObjCTypes.getCopyStructFn();
 }
 
-llvm::Constant *CGObjCMac::GetSetStructFunction() {
+llvm::FunctionCallee CGObjCMac::GetSetStructFunction() {
   return ObjCTypes.getCopyStructFn();
 }
 
-llvm::Constant *CGObjCMac::GetCppAtomicObjectGetFunction() {
+llvm::FunctionCallee CGObjCMac::GetCppAtomicObjectGetFunction() {
   return ObjCTypes.getCppAtomicObjectFunction();
 }
 
-llvm::Constant *CGObjCMac::GetCppAtomicObjectSetFunction() {
+llvm::FunctionCallee CGObjCMac::GetCppAtomicObjectSetFunction() {
   return ObjCTypes.getCppAtomicObjectFunction();
 }
 
-llvm::Constant *CGObjCMac::EnumerationMutationFunction() {
+llvm::FunctionCallee CGObjCMac::EnumerationMutationFunction() {
   return ObjCTypes.getEnumerationMutationFn();
 }
 
@@ -7090,7 +7090,7 @@
   // 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;
+  llvm::FunctionCallee fn = nullptr;
   std::string messageRefName("\01l_");
   if (CGM.ReturnSlotInterferesWithArgs(MSI.CallInfo)) {
     if (isSuper) {
@@ -7126,7 +7126,7 @@
     // Build the message ref structure.
     ConstantInitBuilder builder(CGM);
     auto values = builder.beginStruct();
-    values.add(fn);
+    values.add(cast<llvm::Constant>(fn.getCallee()));
     values.add(GetMethodVarName(selector));
     messageRef = values.finishAndCreateGlobal(messageRefName,
                                               CharUnits::fromQuantity(16),
@@ -7530,9 +7530,8 @@
 void
 CGObjCNonFragileABIMac::EmitSynchronizedStmt(CodeGen::CodeGenFunction &CGF,
                                              const ObjCAtSynchronizedStmt &S) {
-  EmitAtSynchronizedStmt(CGF, S,
-      cast<llvm::Function>(ObjCTypes.getSyncEnterFn()),
-      cast<llvm::Function>(ObjCTypes.getSyncExitFn()));
+  EmitAtSynchronizedStmt(CGF, S, ObjCTypes.getSyncEnterFn(),
+                         ObjCTypes.getSyncExitFn());
 }
 
 llvm::Constant *
@@ -7563,10 +7562,9 @@
 
 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()));
+  EmitTryCatchStmt(CGF, S, ObjCTypes.getObjCBeginCatchFn(),
+                   ObjCTypes.getObjCEndCatchFn(),
+                   ObjCTypes.getExceptionRethrowFn());
 }
 
 /// EmitThrowStmt - Generate code for a throw statement.
diff --git a/clang/lib/CodeGen/CGObjCRuntime.h b/clang/lib/CodeGen/CGObjCRuntime.h
--- a/clang/lib/CodeGen/CGObjCRuntime.h
+++ b/clang/lib/CodeGen/CGObjCRuntime.h
@@ -95,11 +95,10 @@
   /// used to rethrow exceptions.  If the begin and end catch functions are
   /// NULL, then the function assumes that the EH personality function provides
   /// the thrown object directly.
-  void EmitTryCatchStmt(CodeGenFunction &CGF,
-                        const ObjCAtTryStmt &S,
-                        llvm::Constant *beginCatchFn,
-                        llvm::Constant *endCatchFn,
-                        llvm::Constant *exceptionRethrowFn);
+  void EmitTryCatchStmt(CodeGenFunction &CGF, const ObjCAtTryStmt &S,
+                        llvm::FunctionCallee beginCatchFn,
+                        llvm::FunctionCallee endCatchFn,
+                        llvm::FunctionCallee exceptionRethrowFn);
 
   void EmitInitOfCatchParam(CodeGenFunction &CGF, llvm::Value *exn,
                             const VarDecl *paramDecl);
@@ -109,9 +108,9 @@
   /// the object.  This function can be called by subclasses that use
   /// zero-cost exception handling.
   void EmitAtSynchronizedStmt(CodeGenFunction &CGF,
-                            const ObjCAtSynchronizedStmt &S,
-                            llvm::Function *syncEnterFn,
-                            llvm::Function *syncExitFn);
+                              const ObjCAtSynchronizedStmt &S,
+                              llvm::FunctionCallee syncEnterFn,
+                              llvm::FunctionCallee syncExitFn);
 
 public:
   virtual ~CGObjCRuntime();
@@ -207,25 +206,25 @@
                                          const ObjCContainerDecl *CD) = 0;
 
   /// Return the runtime function for getting properties.
-  virtual llvm::Constant *GetPropertyGetFunction() = 0;
+  virtual llvm::FunctionCallee GetPropertyGetFunction() = 0;
 
   /// Return the runtime function for setting properties.
-  virtual llvm::Constant *GetPropertySetFunction() = 0;
+  virtual llvm::FunctionCallee GetPropertySetFunction() = 0;
 
   /// Return the runtime function for optimized setting properties.
-  virtual llvm::Constant *GetOptimizedPropertySetFunction(bool atomic,
-                                                          bool copy) = 0;
+  virtual llvm::FunctionCallee GetOptimizedPropertySetFunction(bool atomic,
+                                                               bool copy) = 0;
 
   // API for atomic copying of qualified aggregates in getter.
-  virtual llvm::Constant *GetGetStructFunction() = 0;
+  virtual llvm::FunctionCallee GetGetStructFunction() = 0;
   // API for atomic copying of qualified aggregates in setter.
-  virtual llvm::Constant *GetSetStructFunction() = 0;
+  virtual llvm::FunctionCallee GetSetStructFunction() = 0;
   /// API for atomic copying of qualified aggregates with non-trivial copy
   /// assignment (c++) in setter.
-  virtual llvm::Constant *GetCppAtomicObjectSetFunction() = 0;
+  virtual llvm::FunctionCallee GetCppAtomicObjectSetFunction() = 0;
   /// API for atomic copying of qualified aggregates with non-trivial copy
   /// assignment (c++) in getter.
-  virtual llvm::Constant *GetCppAtomicObjectGetFunction() = 0;
+  virtual llvm::FunctionCallee GetCppAtomicObjectGetFunction() = 0;
 
   /// GetClass - Return a reference to the class for the given
   /// interface decl.
@@ -239,7 +238,7 @@
 
   /// EnumerationMutationFunction - Return the function that's called by the
   /// compiler when a mutation is detected during foreach iteration.
-  virtual llvm::Constant *EnumerationMutationFunction() = 0;
+  virtual llvm::FunctionCallee EnumerationMutationFunction() = 0;
 
   virtual void EmitSynchronizedStmt(CodeGen::CodeGenFunction &CGF,
                                     const ObjCAtSynchronizedStmt &S) = 0;
diff --git a/clang/lib/CodeGen/CGObjCRuntime.cpp b/clang/lib/CodeGen/CGObjCRuntime.cpp
--- a/clang/lib/CodeGen/CGObjCRuntime.cpp
+++ b/clang/lib/CodeGen/CGObjCRuntime.cpp
@@ -125,10 +125,10 @@
   };
 
   struct CallObjCEndCatch final : EHScopeStack::Cleanup {
-    CallObjCEndCatch(bool MightThrow, llvm::Value *Fn)
+    CallObjCEndCatch(bool MightThrow, llvm::FunctionCallee Fn)
         : MightThrow(MightThrow), Fn(Fn) {}
     bool MightThrow;
-    llvm::Value *Fn;
+    llvm::FunctionCallee Fn;
 
     void Emit(CodeGenFunction &CGF, Flags flags) override {
       if (MightThrow)
@@ -139,12 +139,11 @@
   };
 }
 
-
 void CGObjCRuntime::EmitTryCatchStmt(CodeGenFunction &CGF,
                                      const ObjCAtTryStmt &S,
-                                     llvm::Constant *beginCatchFn,
-                                     llvm::Constant *endCatchFn,
-                                     llvm::Constant *exceptionRethrowFn) {
+                                     llvm::FunctionCallee beginCatchFn,
+                                     llvm::FunctionCallee endCatchFn,
+                                     llvm::FunctionCallee exceptionRethrowFn) {
   // Jump destination for falling out of catch bodies.
   CodeGenFunction::JumpDest Cont;
   if (S.getNumCatchStmts())
@@ -311,10 +310,10 @@
 
 namespace {
   struct CallSyncExit final : EHScopeStack::Cleanup {
-    llvm::Value *SyncExitFn;
+    llvm::FunctionCallee SyncExitFn;
     llvm::Value *SyncArg;
-    CallSyncExit(llvm::Value *SyncExitFn, llvm::Value *SyncArg)
-      : SyncExitFn(SyncExitFn), SyncArg(SyncArg) {}
+    CallSyncExit(llvm::FunctionCallee SyncExitFn, llvm::Value *SyncArg)
+        : SyncExitFn(SyncExitFn), SyncArg(SyncArg) {}
 
     void Emit(CodeGenFunction &CGF, Flags flags) override {
       CGF.EmitNounwindRuntimeCall(SyncExitFn, SyncArg);
@@ -324,8 +323,8 @@
 
 void CGObjCRuntime::EmitAtSynchronizedStmt(CodeGenFunction &CGF,
                                            const ObjCAtSynchronizedStmt &S,
-                                           llvm::Function *syncEnterFn,
-                                           llvm::Function *syncExitFn) {
+                                           llvm::FunctionCallee syncEnterFn,
+                                           llvm::FunctionCallee syncExitFn) {
   CodeGenFunction::RunCleanupsScope cleanups(CGF);
 
   // Evaluate the lock operand.  This is guaranteed to dominate the
diff --git a/clang/lib/CodeGen/CGOpenMPRuntime.h b/clang/lib/CodeGen/CGOpenMPRuntime.h
--- a/clang/lib/CodeGen/CGOpenMPRuntime.h
+++ b/clang/lib/CodeGen/CGOpenMPRuntime.h
@@ -271,7 +271,8 @@
   virtual StringRef getOutlinedHelperName() const { return ".omp_outlined."; }
 
   /// Emits \p Callee function call with arguments \p Args with location \p Loc.
-  void emitCall(CodeGenFunction &CGF, SourceLocation Loc, llvm::Value *Callee,
+  void emitCall(CodeGenFunction &CGF, SourceLocation Loc,
+                llvm::FunctionCallee Callee,
                 ArrayRef<llvm::Value *> Args = llvm::None) const;
 
   /// Emits address of the word in a memory where current thread id is
@@ -671,23 +672,27 @@
   /// Returns specified OpenMP runtime function.
   /// \param Function OpenMP runtime function.
   /// \return Specified function.
-  llvm::Constant *createRuntimeFunction(unsigned Function);
+  llvm::FunctionCallee createRuntimeFunction(unsigned Function);
 
   /// Returns __kmpc_for_static_init_* runtime function for the specified
   /// size \a IVSize and sign \a IVSigned.
-  llvm::Constant *createForStaticInitFunction(unsigned IVSize, bool IVSigned);
+  llvm::FunctionCallee createForStaticInitFunction(unsigned IVSize,
+                                                   bool IVSigned);
 
   /// Returns __kmpc_dispatch_init_* runtime function for the specified
   /// size \a IVSize and sign \a IVSigned.
-  llvm::Constant *createDispatchInitFunction(unsigned IVSize, bool IVSigned);
+  llvm::FunctionCallee createDispatchInitFunction(unsigned IVSize,
+                                                  bool IVSigned);
 
   /// Returns __kmpc_dispatch_next_* runtime function for the specified
   /// size \a IVSize and sign \a IVSigned.
-  llvm::Constant *createDispatchNextFunction(unsigned IVSize, bool IVSigned);
+  llvm::FunctionCallee createDispatchNextFunction(unsigned IVSize,
+                                                  bool IVSigned);
 
   /// Returns __kmpc_dispatch_fini_* runtime function for the specified
   /// size \a IVSize and sign \a IVSigned.
-  llvm::Constant *createDispatchFiniFunction(unsigned IVSize, bool IVSigned);
+  llvm::FunctionCallee createDispatchFiniFunction(unsigned IVSize,
+                                                  bool IVSigned);
 
   /// If the specified mangled name is not in the module, create and
   /// return threadprivate cache object. This object is a pointer's worth of
@@ -723,7 +728,7 @@
 
   struct TaskResultTy {
     llvm::Value *NewTask = nullptr;
-    llvm::Value *TaskEntry = nullptr;
+    llvm::Function *TaskEntry = nullptr;
     llvm::Value *NewTaskNewTaskTTy = nullptr;
     LValue TDBase;
     const RecordDecl *KmpTaskTQTyRD = nullptr;
@@ -753,7 +758,7 @@
   /// state, list of privates etc.
   TaskResultTy emitTaskInit(CodeGenFunction &CGF, SourceLocation Loc,
                             const OMPExecutableDirective &D,
-                            llvm::Value *TaskFunction, QualType SharedsTy,
+                            llvm::Function *TaskFunction, QualType SharedsTy,
                             Address Shareds, const OMPTaskDataTy &Data);
 
 public:
@@ -780,7 +785,7 @@
   /// \param InnermostKind Kind of innermost directive (for simple directives it
   /// is a directive itself, for combined - its innermost directive).
   /// \param CodeGen Code generation sequence for the \a D directive.
-  virtual llvm::Value *emitParallelOutlinedFunction(
+  virtual llvm::Function *emitParallelOutlinedFunction(
       const OMPExecutableDirective &D, const VarDecl *ThreadIDVar,
       OpenMPDirectiveKind InnermostKind, const RegionCodeGenTy &CodeGen);
 
@@ -792,7 +797,7 @@
   /// \param InnermostKind Kind of innermost directive (for simple directives it
   /// is a directive itself, for combined - its innermost directive).
   /// \param CodeGen Code generation sequence for the \a D directive.
-  virtual llvm::Value *emitTeamsOutlinedFunction(
+  virtual llvm::Function *emitTeamsOutlinedFunction(
       const OMPExecutableDirective &D, const VarDecl *ThreadIDVar,
       OpenMPDirectiveKind InnermostKind, const RegionCodeGenTy &CodeGen);
 
@@ -811,7 +816,7 @@
   /// \param NumberOfParts Number of parts in untied task. Ignored for tied
   /// tasks.
   ///
-  virtual llvm::Value *emitTaskOutlinedFunction(
+  virtual llvm::Function *emitTaskOutlinedFunction(
       const OMPExecutableDirective &D, const VarDecl *ThreadIDVar,
       const VarDecl *PartIDVar, const VarDecl *TaskTVar,
       OpenMPDirectiveKind InnermostKind, const RegionCodeGenTy &CodeGen,
@@ -832,7 +837,7 @@
   /// specified, nullptr otherwise.
   ///
   virtual void emitParallelCall(CodeGenFunction &CGF, SourceLocation Loc,
-                                llvm::Value *OutlinedFn,
+                                llvm::Function *OutlinedFn,
                                 ArrayRef<llvm::Value *> CapturedVars,
                                 const Expr *IfCond);
 
@@ -1161,7 +1166,7 @@
   /// state, list of privates etc.
   virtual void emitTaskCall(CodeGenFunction &CGF, SourceLocation Loc,
                             const OMPExecutableDirective &D,
-                            llvm::Value *TaskFunction, QualType SharedsTy,
+                            llvm::Function *TaskFunction, QualType SharedsTy,
                             Address Shareds, const Expr *IfCond,
                             const OMPTaskDataTy &Data);
 
@@ -1194,10 +1199,11 @@
   /// otherwise.
   /// \param Data Additional data for task generation like tiednsee, final
   /// state, list of privates etc.
-  virtual void emitTaskLoopCall(
-      CodeGenFunction &CGF, SourceLocation Loc, const OMPLoopDirective &D,
-      llvm::Value *TaskFunction, QualType SharedsTy, Address Shareds,
-      const Expr *IfCond, const OMPTaskDataTy &Data);
+  virtual void emitTaskLoopCall(CodeGenFunction &CGF, SourceLocation Loc,
+                                const OMPLoopDirective &D,
+                                llvm::Function *TaskFunction,
+                                QualType SharedsTy, Address Shareds,
+                                const Expr *IfCond, const OMPTaskDataTy &Data);
 
   /// Emit code for the directive that does not require outlining.
   ///
@@ -1218,12 +1224,12 @@
   /// \param RHSExprs List of RHS in \a ReductionOps reduction operations.
   /// \param ReductionOps List of reduction operations in form 'LHS binop RHS'
   /// or 'operator binop(LHS, RHS)'.
-  llvm::Value *emitReductionFunction(CodeGenModule &CGM, SourceLocation Loc,
-                                     llvm::Type *ArgsType,
-                                     ArrayRef<const Expr *> Privates,
-                                     ArrayRef<const Expr *> LHSExprs,
-                                     ArrayRef<const Expr *> RHSExprs,
-                                     ArrayRef<const Expr *> ReductionOps);
+  llvm::Function *emitReductionFunction(CodeGenModule &CGM, SourceLocation Loc,
+                                        llvm::Type *ArgsType,
+                                        ArrayRef<const Expr *> Privates,
+                                        ArrayRef<const Expr *> LHSExprs,
+                                        ArrayRef<const Expr *> RHSExprs,
+                                        ArrayRef<const Expr *> ReductionOps);
 
   /// Emits single reduction combiner
   void emitSingleReductionCombiner(CodeGenFunction &CGF,
@@ -1388,7 +1394,7 @@
   /// target directive, or null if no device clause is used.
   virtual void emitTargetCall(CodeGenFunction &CGF,
                               const OMPExecutableDirective &D,
-                              llvm::Value *OutlinedFn,
+                              llvm::Function *OutlinedFn,
                               llvm::Value *OutlinedFnID, const Expr *IfCond,
                               const Expr *Device);
 
@@ -1428,7 +1434,7 @@
   ///
   virtual void emitTeamsCall(CodeGenFunction &CGF,
                              const OMPExecutableDirective &D,
-                             SourceLocation Loc, llvm::Value *OutlinedFn,
+                             SourceLocation Loc, llvm::Function *OutlinedFn,
                              ArrayRef<llvm::Value *> CapturedVars);
 
   /// Emits call to void __kmpc_push_num_teams(ident_t *loc, kmp_int32
@@ -1555,7 +1561,7 @@
   /// translating these arguments to correct target-specific arguments.
   virtual void
   emitOutlinedFunctionCall(CodeGenFunction &CGF, SourceLocation Loc,
-                           llvm::Value *OutlinedFn,
+                           llvm::FunctionCallee OutlinedFn,
                            ArrayRef<llvm::Value *> Args = llvm::None) const;
 
   /// Emits OpenMP-specific function prolog.
@@ -1599,7 +1605,7 @@
   /// \param InnermostKind Kind of innermost directive (for simple directives it
   /// is a directive itself, for combined - its innermost directive).
   /// \param CodeGen Code generation sequence for the \a D directive.
-  llvm::Value *
+  llvm::Function *
   emitParallelOutlinedFunction(const OMPExecutableDirective &D,
                                const VarDecl *ThreadIDVar,
                                OpenMPDirectiveKind InnermostKind,
@@ -1613,7 +1619,7 @@
   /// \param InnermostKind Kind of innermost directive (for simple directives it
   /// is a directive itself, for combined - its innermost directive).
   /// \param CodeGen Code generation sequence for the \a D directive.
-  llvm::Value *
+  llvm::Function *
   emitTeamsOutlinedFunction(const OMPExecutableDirective &D,
                             const VarDecl *ThreadIDVar,
                             OpenMPDirectiveKind InnermostKind,
@@ -1634,7 +1640,7 @@
   /// \param NumberOfParts Number of parts in untied task. Ignored for tied
   /// tasks.
   ///
-  llvm::Value *emitTaskOutlinedFunction(
+  llvm::Function *emitTaskOutlinedFunction(
       const OMPExecutableDirective &D, const VarDecl *ThreadIDVar,
       const VarDecl *PartIDVar, const VarDecl *TaskTVar,
       OpenMPDirectiveKind InnermostKind, const RegionCodeGenTy &CodeGen,
@@ -1651,7 +1657,7 @@
   /// specified, nullptr otherwise.
   ///
   void emitParallelCall(CodeGenFunction &CGF, SourceLocation Loc,
-                        llvm::Value *OutlinedFn,
+                        llvm::Function *OutlinedFn,
                         ArrayRef<llvm::Value *> CapturedVars,
                         const Expr *IfCond) override;
 
@@ -1877,8 +1883,9 @@
   /// \param Data Additional data for task generation like tiednsee, final
   /// state, list of privates etc.
   void emitTaskCall(CodeGenFunction &CGF, SourceLocation Loc,
-                    const OMPExecutableDirective &D, llvm::Value *TaskFunction,
-                    QualType SharedsTy, Address Shareds, const Expr *IfCond,
+                    const OMPExecutableDirective &D,
+                    llvm::Function *TaskFunction, QualType SharedsTy,
+                    Address Shareds, const Expr *IfCond,
                     const OMPTaskDataTy &Data) override;
 
   /// Emit task region for the taskloop directive. The taskloop region is
@@ -1911,7 +1918,7 @@
   /// \param Data Additional data for task generation like tiednsee, final
   /// state, list of privates etc.
   void emitTaskLoopCall(CodeGenFunction &CGF, SourceLocation Loc,
-                        const OMPLoopDirective &D, llvm::Value *TaskFunction,
+                        const OMPLoopDirective &D, llvm::Function *TaskFunction,
                         QualType SharedsTy, Address Shareds, const Expr *IfCond,
                         const OMPTaskDataTy &Data) override;
 
@@ -2054,7 +2061,7 @@
   /// \param Device Expression evaluated in device clause associated with the
   /// target directive, or null if no device clause is used.
   void emitTargetCall(CodeGenFunction &CGF, const OMPExecutableDirective &D,
-                      llvm::Value *OutlinedFn, llvm::Value *OutlinedFnID,
+                      llvm::Function *OutlinedFn, llvm::Value *OutlinedFnID,
                       const Expr *IfCond, const Expr *Device) override;
 
   /// Emit the target regions enclosed in \a GD function definition or
@@ -2087,7 +2094,7 @@
   /// variables used in \a OutlinedFn function.
   ///
   void emitTeamsCall(CodeGenFunction &CGF, const OMPExecutableDirective &D,
-                     SourceLocation Loc, llvm::Value *OutlinedFn,
+                     SourceLocation Loc, llvm::Function *OutlinedFn,
                      ArrayRef<llvm::Value *> CapturedVars) override;
 
   /// Emits call to void __kmpc_push_num_teams(ident_t *loc, kmp_int32
diff --git a/clang/lib/CodeGen/CGOpenMPRuntime.cpp b/clang/lib/CodeGen/CGOpenMPRuntime.cpp
--- a/clang/lib/CodeGen/CGOpenMPRuntime.cpp
+++ b/clang/lib/CodeGen/CGOpenMPRuntime.cpp
@@ -1338,7 +1338,7 @@
   return UDRMap.lookup(D);
 }
 
-static llvm::Value *emitParallelOrTeamsOutlinedFunction(
+static llvm::Function *emitParallelOrTeamsOutlinedFunction(
     CodeGenModule &CGM, const OMPExecutableDirective &D, const CapturedStmt *CS,
     const VarDecl *ThreadIDVar, OpenMPDirectiveKind InnermostKind,
     const StringRef OutlinedHelperName, const RegionCodeGenTy &CodeGen) {
@@ -1368,7 +1368,7 @@
   return CGF.GenerateOpenMPCapturedStmtFunction(*CS);
 }
 
-llvm::Value *CGOpenMPRuntime::emitParallelOutlinedFunction(
+llvm::Function *CGOpenMPRuntime::emitParallelOutlinedFunction(
     const OMPExecutableDirective &D, const VarDecl *ThreadIDVar,
     OpenMPDirectiveKind InnermostKind, const RegionCodeGenTy &CodeGen) {
   const CapturedStmt *CS = D.getCapturedStmt(OMPD_parallel);
@@ -1376,7 +1376,7 @@
       CGM, D, CS, ThreadIDVar, InnermostKind, getOutlinedHelperName(), CodeGen);
 }
 
-llvm::Value *CGOpenMPRuntime::emitTeamsOutlinedFunction(
+llvm::Function *CGOpenMPRuntime::emitTeamsOutlinedFunction(
     const OMPExecutableDirective &D, const VarDecl *ThreadIDVar,
     OpenMPDirectiveKind InnermostKind, const RegionCodeGenTy &CodeGen) {
   const CapturedStmt *CS = D.getCapturedStmt(OMPD_teams);
@@ -1384,7 +1384,7 @@
       CGM, D, CS, ThreadIDVar, InnermostKind, getOutlinedHelperName(), CodeGen);
 }
 
-llvm::Value *CGOpenMPRuntime::emitTaskOutlinedFunction(
+llvm::Function *CGOpenMPRuntime::emitTaskOutlinedFunction(
     const OMPExecutableDirective &D, const VarDecl *ThreadIDVar,
     const VarDecl *PartIDVar, const VarDecl *TaskTVar,
     OpenMPDirectiveKind InnermostKind, const RegionCodeGenTy &CodeGen,
@@ -1415,7 +1415,7 @@
                                         InnermostKind,
                                         TD ? TD->hasCancel() : false, Action);
   CodeGenFunction::CGCapturedStmtRAII CapInfoRAII(CGF, &CGInfo);
-  llvm::Value *Res = CGF.GenerateCapturedStmtFunction(*CS);
+  llvm::Function *Res = CGF.GenerateCapturedStmtFunction(*CS);
   if (!Tied)
     NumberOfParts = Action.getNumberOfParts();
   return Res;
@@ -1663,9 +1663,8 @@
   return llvm::PointerType::getUnqual(Kmpc_MicroTy);
 }
 
-llvm::Constant *
-CGOpenMPRuntime::createRuntimeFunction(unsigned Function) {
-  llvm::Constant *RTLFn = nullptr;
+llvm::FunctionCallee CGOpenMPRuntime::createRuntimeFunction(unsigned Function) {
+  llvm::FunctionCallee RTLFn = nullptr;
   switch (static_cast<OpenMPRTLFunction>(Function)) {
   case OMPRTL__kmpc_fork_call: {
     // Build void __kmpc_fork_call(ident_t *loc, kmp_int32 argc, kmpc_micro
@@ -1675,7 +1674,7 @@
     auto *FnTy =
         llvm::FunctionType::get(CGM.VoidTy, TypeParams, /*isVarArg*/ true);
     RTLFn = CGM.CreateRuntimeFunction(FnTy, "__kmpc_fork_call");
-    if (auto *F = dyn_cast<llvm::Function>(RTLFn)) {
+    if (auto *F = dyn_cast<llvm::Function>(RTLFn.getCallee())) {
       if (!F->hasMetadata(llvm::LLVMContext::MD_callback)) {
         llvm::LLVMContext &Ctx = F->getContext();
         llvm::MDBuilder MDB(Ctx);
@@ -2098,7 +2097,7 @@
     auto *FnTy =
         llvm::FunctionType::get(CGM.VoidTy, TypeParams, /*isVarArg*/ true);
     RTLFn = CGM.CreateRuntimeFunction(FnTy, "__kmpc_fork_teams");
-    if (auto *F = dyn_cast<llvm::Function>(RTLFn)) {
+    if (auto *F = dyn_cast<llvm::Function>(RTLFn.getCallee())) {
       if (!F->hasMetadata(llvm::LLVMContext::MD_callback)) {
         llvm::LLVMContext &Ctx = F->getContext();
         llvm::MDBuilder MDB(Ctx);
@@ -2385,8 +2384,8 @@
   return RTLFn;
 }
 
-llvm::Constant *CGOpenMPRuntime::createForStaticInitFunction(unsigned IVSize,
-                                                             bool IVSigned) {
+llvm::FunctionCallee
+CGOpenMPRuntime::createForStaticInitFunction(unsigned IVSize, bool IVSigned) {
   assert((IVSize == 32 || IVSize == 64) &&
          "IV size is not compatible with the omp runtime");
   StringRef Name = IVSize == 32 ? (IVSigned ? "__kmpc_for_static_init_4"
@@ -2411,8 +2410,8 @@
   return CGM.CreateRuntimeFunction(FnTy, Name);
 }
 
-llvm::Constant *CGOpenMPRuntime::createDispatchInitFunction(unsigned IVSize,
-                                                            bool IVSigned) {
+llvm::FunctionCallee
+CGOpenMPRuntime::createDispatchInitFunction(unsigned IVSize, bool IVSigned) {
   assert((IVSize == 32 || IVSize == 64) &&
          "IV size is not compatible with the omp runtime");
   StringRef Name =
@@ -2433,8 +2432,8 @@
   return CGM.CreateRuntimeFunction(FnTy, Name);
 }
 
-llvm::Constant *CGOpenMPRuntime::createDispatchFiniFunction(unsigned IVSize,
-                                                            bool IVSigned) {
+llvm::FunctionCallee
+CGOpenMPRuntime::createDispatchFiniFunction(unsigned IVSize, bool IVSigned) {
   assert((IVSize == 32 || IVSize == 64) &&
          "IV size is not compatible with the omp runtime");
   StringRef Name =
@@ -2450,8 +2449,8 @@
   return CGM.CreateRuntimeFunction(FnTy, Name);
 }
 
-llvm::Constant *CGOpenMPRuntime::createDispatchNextFunction(unsigned IVSize,
-                                                            bool IVSigned) {
+llvm::FunctionCallee
+CGOpenMPRuntime::createDispatchNextFunction(unsigned IVSize, bool IVSigned) {
   assert((IVSize == 32 || IVSize == 64) &&
          "IV size is not compatible with the omp runtime");
   StringRef Name =
@@ -2866,7 +2865,7 @@
 }
 
 void CGOpenMPRuntime::emitParallelCall(CodeGenFunction &CGF, SourceLocation Loc,
-                                       llvm::Value *OutlinedFn,
+                                       llvm::Function *OutlinedFn,
                                        ArrayRef<llvm::Value *> CapturedVars,
                                        const Expr *IfCond) {
   if (!CGF.HaveInsertPoint())
@@ -2884,7 +2883,8 @@
     RealArgs.append(std::begin(Args), std::end(Args));
     RealArgs.append(CapturedVars.begin(), CapturedVars.end());
 
-    llvm::Value *RTLFn = RT.createRuntimeFunction(OMPRTL__kmpc_fork_call);
+    llvm::FunctionCallee RTLFn =
+        RT.createRuntimeFunction(OMPRTL__kmpc_fork_call);
     CGF.EmitRuntimeCall(RTLFn, RealArgs);
   };
   auto &&ElseGen = [OutlinedFn, CapturedVars, RTLoc, Loc](CodeGenFunction &CGF,
@@ -2974,17 +2974,18 @@
 namespace {
 /// Common pre(post)-action for different OpenMP constructs.
 class CommonActionTy final : public PrePostActionTy {
-  llvm::Value *EnterCallee;
+  llvm::FunctionCallee EnterCallee;
   ArrayRef<llvm::Value *> EnterArgs;
-  llvm::Value *ExitCallee;
+  llvm::FunctionCallee ExitCallee;
   ArrayRef<llvm::Value *> ExitArgs;
   bool Conditional;
   llvm::BasicBlock *ContBlock = nullptr;
 
 public:
-  CommonActionTy(llvm::Value *EnterCallee, ArrayRef<llvm::Value *> EnterArgs,
-                 llvm::Value *ExitCallee, ArrayRef<llvm::Value *> ExitArgs,
-                 bool Conditional = false)
+  CommonActionTy(llvm::FunctionCallee EnterCallee,
+                 ArrayRef<llvm::Value *> EnterArgs,
+                 llvm::FunctionCallee ExitCallee,
+                 ArrayRef<llvm::Value *> ExitArgs, bool Conditional = false)
       : EnterCallee(EnterCallee), EnterArgs(EnterArgs), ExitCallee(ExitCallee),
         ExitArgs(ExitArgs), Conditional(Conditional) {}
   void Enter(CodeGenFunction &CGF) override {
@@ -3442,7 +3443,7 @@
 
 static void emitForStaticInitCall(
     CodeGenFunction &CGF, llvm::Value *UpdateLocation, llvm::Value *ThreadId,
-    llvm::Constant *ForStaticInitFunction, OpenMPSchedType Schedule,
+    llvm::FunctionCallee ForStaticInitFunction, OpenMPSchedType Schedule,
     OpenMPScheduleClauseModifier M1, OpenMPScheduleClauseModifier M2,
     const CGOpenMPRuntime::StaticRTInput &Values) {
   if (!CGF.HaveInsertPoint())
@@ -3503,7 +3504,7 @@
                                                  ? OMP_IDENT_WORK_LOOP
                                                  : OMP_IDENT_WORK_SECTIONS);
   llvm::Value *ThreadId = getThreadID(CGF, Loc);
-  llvm::Constant *StaticInitFunction =
+  llvm::FunctionCallee StaticInitFunction =
       createForStaticInitFunction(Values.IVSize, Values.IVSigned);
   emitForStaticInitCall(CGF, UpdatedLocation, ThreadId, StaticInitFunction,
                         ScheduleNum, ScheduleKind.M1, ScheduleKind.M2, Values);
@@ -3518,7 +3519,7 @@
   llvm::Value *UpdatedLocation =
       emitUpdateLocation(CGF, Loc, OMP_IDENT_WORK_DISTRIBUTE);
   llvm::Value *ThreadId = getThreadID(CGF, Loc);
-  llvm::Constant *StaticInitFunction =
+  llvm::FunctionCallee StaticInitFunction =
       createForStaticInitFunction(Values.IVSize, Values.IVSigned);
   emitForStaticInitCall(CGF, UpdatedLocation, ThreadId, StaticInitFunction,
                         ScheduleNum, OMPC_SCHEDULE_MODIFIER_unknown,
@@ -4394,12 +4395,12 @@
 ///   return 0;
 /// }
 /// \endcode
-static llvm::Value *
+static llvm::Function *
 emitProxyTaskFunction(CodeGenModule &CGM, SourceLocation Loc,
                       OpenMPDirectiveKind Kind, QualType KmpInt32Ty,
                       QualType KmpTaskTWithPrivatesPtrQTy,
                       QualType KmpTaskTWithPrivatesQTy, QualType KmpTaskTQTy,
-                      QualType SharedsPtrTy, llvm::Value *TaskFunction,
+                      QualType SharedsPtrTy, llvm::Function *TaskFunction,
                       llvm::Value *TaskPrivatesMap) {
   ASTContext &C = CGM.getContext();
   FunctionArgList Args;
@@ -4867,7 +4868,7 @@
 CGOpenMPRuntime::TaskResultTy
 CGOpenMPRuntime::emitTaskInit(CodeGenFunction &CGF, SourceLocation Loc,
                               const OMPExecutableDirective &D,
-                              llvm::Value *TaskFunction, QualType SharedsTy,
+                              llvm::Function *TaskFunction, QualType SharedsTy,
                               Address Shareds, const OMPTaskDataTy &Data) {
   ASTContext &C = CGM.getContext();
   llvm::SmallVector<PrivateDataTy, 4> Privates;
@@ -4941,7 +4942,7 @@
   // Emit initial values for private copies (if any).
   llvm::Value *TaskPrivatesMap = nullptr;
   llvm::Type *TaskPrivatesMapTy =
-      std::next(cast<llvm::Function>(TaskFunction)->arg_begin(), 3)->getType();
+      std::next(TaskFunction->arg_begin(), 3)->getType();
   if (!Privates.empty()) {
     auto FI = std::next(KmpTaskTWithPrivatesQTyRD->field_begin());
     TaskPrivatesMap = emitTaskPrivateMappingFunction(
@@ -4955,7 +4956,7 @@
   }
   // Build a proxy function kmp_int32 .omp_task_entry.(kmp_int32 gtid,
   // kmp_task_t *tt);
-  llvm::Value *TaskEntry = emitProxyTaskFunction(
+  llvm::Function *TaskEntry = emitProxyTaskFunction(
       CGM, Loc, D.getDirectiveKind(), KmpInt32Ty, KmpTaskTWithPrivatesPtrQTy,
       KmpTaskTWithPrivatesQTy, KmpTaskTQTy, SharedsPtrTy, TaskFunction,
       TaskPrivatesMap);
@@ -5067,7 +5068,7 @@
 
 void CGOpenMPRuntime::emitTaskCall(CodeGenFunction &CGF, SourceLocation Loc,
                                    const OMPExecutableDirective &D,
-                                   llvm::Value *TaskFunction,
+                                   llvm::Function *TaskFunction,
                                    QualType SharedsTy, Address Shareds,
                                    const Expr *IfCond,
                                    const OMPTaskDataTy &Data) {
@@ -5077,7 +5078,7 @@
   TaskResultTy Result =
       emitTaskInit(CGF, Loc, D, TaskFunction, SharedsTy, Shareds, Data);
   llvm::Value *NewTask = Result.NewTask;
-  llvm::Value *TaskEntry = Result.TaskEntry;
+  llvm::Function *TaskEntry = Result.TaskEntry;
   llvm::Value *NewTaskNewTaskTTy = Result.NewTaskNewTaskTTy;
   LValue TDBase = Result.TDBase;
   const RecordDecl *KmpTaskTQTyRD = Result.KmpTaskTQTyRD;
@@ -5261,7 +5262,7 @@
 
 void CGOpenMPRuntime::emitTaskLoopCall(CodeGenFunction &CGF, SourceLocation Loc,
                                        const OMPLoopDirective &D,
-                                       llvm::Value *TaskFunction,
+                                       llvm::Function *TaskFunction,
                                        QualType SharedsTy, Address Shareds,
                                        const Expr *IfCond,
                                        const OMPTaskDataTy &Data) {
@@ -5441,7 +5442,7 @@
   CGF.EmitIgnoredExpr(ReductionOp);
 }
 
-llvm::Value *CGOpenMPRuntime::emitReductionFunction(
+llvm::Function *CGOpenMPRuntime::emitReductionFunction(
     CodeGenModule &CGM, SourceLocation Loc, llvm::Type *ArgsType,
     ArrayRef<const Expr *> Privates, ArrayRef<const Expr *> LHSExprs,
     ArrayRef<const Expr *> RHSExprs, ArrayRef<const Expr *> ReductionOps) {
@@ -5657,7 +5658,7 @@
   }
 
   // 2. Emit reduce_func().
-  llvm::Value *ReductionFn = emitReductionFunction(
+  llvm::Function *ReductionFn = emitReductionFunction(
       CGM, Loc, CGF.ConvertTypeForMem(ReductionArrayTy)->getPointerTo(),
       Privates, LHSExprs, RHSExprs, ReductionOps);
 
@@ -8275,7 +8276,7 @@
 
 void CGOpenMPRuntime::emitTargetCall(CodeGenFunction &CGF,
                                      const OMPExecutableDirective &D,
-                                     llvm::Value *OutlinedFn,
+                                     llvm::Function *OutlinedFn,
                                      llvm::Value *OutlinedFnID,
                                      const Expr *IfCond, const Expr *Device) {
   if (!CGF.HaveInsertPoint())
@@ -8868,7 +8869,7 @@
 void CGOpenMPRuntime::emitTeamsCall(CodeGenFunction &CGF,
                                     const OMPExecutableDirective &D,
                                     SourceLocation Loc,
-                                    llvm::Value *OutlinedFn,
+                                    llvm::Function *OutlinedFn,
                                     ArrayRef<llvm::Value *> CapturedVars) {
   if (!CGF.HaveInsertPoint())
     return;
@@ -8885,7 +8886,7 @@
   RealArgs.append(std::begin(Args), std::end(Args));
   RealArgs.append(CapturedVars.begin(), CapturedVars.end());
 
-  llvm::Value *RTLFn = createRuntimeFunction(OMPRTL__kmpc_fork_teams);
+  llvm::FunctionCallee RTLFn = createRuntimeFunction(OMPRTL__kmpc_fork_teams);
   CGF.EmitRuntimeCall(RTLFn, RealArgs);
 }
 
@@ -9436,11 +9437,12 @@
   static const int DoacrossFinArgs = 2;
 
 private:
-  llvm::Value *RTLFn;
+  llvm::FunctionCallee RTLFn;
   llvm::Value *Args[DoacrossFinArgs];
 
 public:
-  DoacrossCleanupTy(llvm::Value *RTLFn, ArrayRef<llvm::Value *> CallArgs)
+  DoacrossCleanupTy(llvm::FunctionCallee RTLFn,
+                    ArrayRef<llvm::Value *> CallArgs)
       : RTLFn(RTLFn) {
     assert(CallArgs.size() == DoacrossFinArgs);
     std::copy(CallArgs.begin(), CallArgs.end(), std::begin(Args));
@@ -9518,11 +9520,13 @@
               .getPointer(),
           CGM.VoidPtrTy)};
 
-  llvm::Value *RTLFn = createRuntimeFunction(OMPRTL__kmpc_doacross_init);
+  llvm::FunctionCallee RTLFn =
+      createRuntimeFunction(OMPRTL__kmpc_doacross_init);
   CGF.EmitRuntimeCall(RTLFn, Args);
   llvm::Value *FiniArgs[DoacrossCleanupTy::DoacrossFinArgs] = {
       emitUpdateLocation(CGF, D.getEndLoc()), getThreadID(CGF, D.getEndLoc())};
-  llvm::Value *FiniRTLFn = createRuntimeFunction(OMPRTL__kmpc_doacross_fini);
+  llvm::FunctionCallee FiniRTLFn =
+      createRuntimeFunction(OMPRTL__kmpc_doacross_fini);
   CGF.EHStack.pushCleanup<DoacrossCleanupTy>(NormalAndEHCleanup, FiniRTLFn,
                                              llvm::makeArrayRef(FiniArgs));
 }
@@ -9554,7 +9558,7 @@
           .CreateConstArrayGEP(CntAddr, 0,
                                CGM.getContext().getTypeSizeInChars(Int64Ty))
           .getPointer()};
-  llvm::Value *RTLFn;
+  llvm::FunctionCallee RTLFn;
   if (C->getDependencyKind() == OMPC_DEPEND_source) {
     RTLFn = createRuntimeFunction(OMPRTL__kmpc_doacross_post);
   } else {
@@ -9565,12 +9569,12 @@
 }
 
 void CGOpenMPRuntime::emitCall(CodeGenFunction &CGF, SourceLocation Loc,
-                               llvm::Value *Callee,
+                               llvm::FunctionCallee Callee,
                                ArrayRef<llvm::Value *> Args) const {
   assert(Loc.isValid() && "Outlined function call location must be valid.");
   auto DL = ApplyDebugLocation::CreateDefaultArtificial(CGF, Loc);
 
-  if (auto *Fn = dyn_cast<llvm::Function>(Callee)) {
+  if (auto *Fn = dyn_cast<llvm::Function>(Callee.getCallee())) {
     if (Fn->doesNotThrow()) {
       CGF.EmitNounwindRuntimeCall(Fn, Args);
       return;
@@ -9580,7 +9584,7 @@
 }
 
 void CGOpenMPRuntime::emitOutlinedFunctionCall(
-    CodeGenFunction &CGF, SourceLocation Loc, llvm::Value *OutlinedFn,
+    CodeGenFunction &CGF, SourceLocation Loc, llvm::FunctionCallee OutlinedFn,
     ArrayRef<llvm::Value *> Args) const {
   emitCall(CGF, Loc, OutlinedFn, Args);
 }
@@ -9596,19 +9600,19 @@
   return Address::invalid();
 }
 
-llvm::Value *CGOpenMPSIMDRuntime::emitParallelOutlinedFunction(
+llvm::Function *CGOpenMPSIMDRuntime::emitParallelOutlinedFunction(
     const OMPExecutableDirective &D, const VarDecl *ThreadIDVar,
     OpenMPDirectiveKind InnermostKind, const RegionCodeGenTy &CodeGen) {
   llvm_unreachable("Not supported in SIMD-only mode");
 }
 
-llvm::Value *CGOpenMPSIMDRuntime::emitTeamsOutlinedFunction(
+llvm::Function *CGOpenMPSIMDRuntime::emitTeamsOutlinedFunction(
     const OMPExecutableDirective &D, const VarDecl *ThreadIDVar,
     OpenMPDirectiveKind InnermostKind, const RegionCodeGenTy &CodeGen) {
   llvm_unreachable("Not supported in SIMD-only mode");
 }
 
-llvm::Value *CGOpenMPSIMDRuntime::emitTaskOutlinedFunction(
+llvm::Function *CGOpenMPSIMDRuntime::emitTaskOutlinedFunction(
     const OMPExecutableDirective &D, const VarDecl *ThreadIDVar,
     const VarDecl *PartIDVar, const VarDecl *TaskTVar,
     OpenMPDirectiveKind InnermostKind, const RegionCodeGenTy &CodeGen,
@@ -9618,7 +9622,7 @@
 
 void CGOpenMPSIMDRuntime::emitParallelCall(CodeGenFunction &CGF,
                                            SourceLocation Loc,
-                                           llvm::Value *OutlinedFn,
+                                           llvm::Function *OutlinedFn,
                                            ArrayRef<llvm::Value *> CapturedVars,
                                            const Expr *IfCond) {
   llvm_unreachable("Not supported in SIMD-only mode");
@@ -9749,7 +9753,7 @@
 
 void CGOpenMPSIMDRuntime::emitTaskCall(CodeGenFunction &CGF, SourceLocation Loc,
                                        const OMPExecutableDirective &D,
-                                       llvm::Value *TaskFunction,
+                                       llvm::Function *TaskFunction,
                                        QualType SharedsTy, Address Shareds,
                                        const Expr *IfCond,
                                        const OMPTaskDataTy &Data) {
@@ -9758,7 +9762,7 @@
 
 void CGOpenMPSIMDRuntime::emitTaskLoopCall(
     CodeGenFunction &CGF, SourceLocation Loc, const OMPLoopDirective &D,
-    llvm::Value *TaskFunction, QualType SharedsTy, Address Shareds,
+    llvm::Function *TaskFunction, QualType SharedsTy, Address Shareds,
     const Expr *IfCond, const OMPTaskDataTy &Data) {
   llvm_unreachable("Not supported in SIMD-only mode");
 }
@@ -9818,9 +9822,10 @@
 
 void CGOpenMPSIMDRuntime::emitTargetCall(CodeGenFunction &CGF,
                                          const OMPExecutableDirective &D,
-                                         llvm::Value *OutlinedFn,
+                                         llvm::Function *OutlinedFn,
                                          llvm::Value *OutlinedFnID,
-                                         const Expr *IfCond, const Expr *Device) {
+                                         const Expr *IfCond,
+                                         const Expr *Device) {
   llvm_unreachable("Not supported in SIMD-only mode");
 }
 
@@ -9843,7 +9848,7 @@
 void CGOpenMPSIMDRuntime::emitTeamsCall(CodeGenFunction &CGF,
                                         const OMPExecutableDirective &D,
                                         SourceLocation Loc,
-                                        llvm::Value *OutlinedFn,
+                                        llvm::Function *OutlinedFn,
                                         ArrayRef<llvm::Value *> CapturedVars) {
   llvm_unreachable("Not supported in SIMD-only mode");
 }
diff --git a/clang/lib/CodeGen/CGOpenMPRuntimeNVPTX.h b/clang/lib/CodeGen/CGOpenMPRuntimeNVPTX.h
--- a/clang/lib/CodeGen/CGOpenMPRuntimeNVPTX.h
+++ b/clang/lib/CodeGen/CGOpenMPRuntimeNVPTX.h
@@ -171,7 +171,7 @@
   /// specified, nullptr otherwise.
   ///
   void emitSPMDParallelCall(CodeGenFunction &CGF, SourceLocation Loc,
-                            llvm::Value *OutlinedFn,
+                            llvm::Function *OutlinedFn,
                             ArrayRef<llvm::Value *> CapturedVars,
                             const Expr *IfCond);
 
@@ -228,7 +228,7 @@
   /// \param InnermostKind Kind of innermost directive (for simple directives it
   /// is a directive itself, for combined - its innermost directive).
   /// \param CodeGen Code generation sequence for the \a D directive.
-  llvm::Value *
+  llvm::Function *
   emitParallelOutlinedFunction(const OMPExecutableDirective &D,
                                const VarDecl *ThreadIDVar,
                                OpenMPDirectiveKind InnermostKind,
@@ -243,7 +243,7 @@
   /// \param InnermostKind Kind of innermost directive (for simple directives it
   /// is a directive itself, for combined - its innermost directive).
   /// \param CodeGen Code generation sequence for the \a D directive.
-  llvm::Value *
+  llvm::Function *
   emitTeamsOutlinedFunction(const OMPExecutableDirective &D,
                             const VarDecl *ThreadIDVar,
                             OpenMPDirectiveKind InnermostKind,
@@ -258,7 +258,7 @@
   /// variables used in \a OutlinedFn function.
   ///
   void emitTeamsCall(CodeGenFunction &CGF, const OMPExecutableDirective &D,
-                     SourceLocation Loc, llvm::Value *OutlinedFn,
+                     SourceLocation Loc, llvm::Function *OutlinedFn,
                      ArrayRef<llvm::Value *> CapturedVars) override;
 
   /// Emits code for parallel or serial call of the \a OutlinedFn with
@@ -271,7 +271,7 @@
   /// \param IfCond Condition in the associated 'if' clause, if it was
   /// specified, nullptr otherwise.
   void emitParallelCall(CodeGenFunction &CGF, SourceLocation Loc,
-                        llvm::Value *OutlinedFn,
+                        llvm::Function *OutlinedFn,
                         ArrayRef<llvm::Value *> CapturedVars,
                         const Expr *IfCond) override;
 
@@ -321,7 +321,7 @@
   /// implementation.  Specialized for the NVPTX device.
   /// \param Function OpenMP runtime function.
   /// \return Specified function.
-  llvm::Constant *createNVPTXRuntimeFunction(unsigned Function);
+  llvm::FunctionCallee createNVPTXRuntimeFunction(unsigned Function);
 
   /// Translates the native parameter of outlined function if this is required
   /// for target.
@@ -340,7 +340,7 @@
   /// Emits call of the outlined function with the provided arguments,
   /// translating these arguments to correct target-specific arguments.
   void emitOutlinedFunctionCall(
-      CodeGenFunction &CGF, SourceLocation Loc, llvm::Value *OutlinedFn,
+      CodeGenFunction &CGF, SourceLocation Loc, llvm::FunctionCallee OutlinedFn,
       ArrayRef<llvm::Value *> Args = llvm::None) const override;
 
   /// Emits OpenMP-specific function prolog.
diff --git a/clang/lib/CodeGen/CGOpenMPRuntimeNVPTX.cpp b/clang/lib/CodeGen/CGOpenMPRuntimeNVPTX.cpp
--- a/clang/lib/CodeGen/CGOpenMPRuntimeNVPTX.cpp
+++ b/clang/lib/CodeGen/CGOpenMPRuntimeNVPTX.cpp
@@ -105,17 +105,18 @@
 
 /// Pre(post)-action for different OpenMP constructs specialized for NVPTX.
 class NVPTXActionTy final : public PrePostActionTy {
-  llvm::Value *EnterCallee = nullptr;
+  llvm::FunctionCallee EnterCallee = nullptr;
   ArrayRef<llvm::Value *> EnterArgs;
-  llvm::Value *ExitCallee = nullptr;
+  llvm::FunctionCallee ExitCallee = nullptr;
   ArrayRef<llvm::Value *> ExitArgs;
   bool Conditional = false;
   llvm::BasicBlock *ContBlock = nullptr;
 
 public:
-  NVPTXActionTy(llvm::Value *EnterCallee, ArrayRef<llvm::Value *> EnterArgs,
-                llvm::Value *ExitCallee, ArrayRef<llvm::Value *> ExitArgs,
-                bool Conditional = false)
+  NVPTXActionTy(llvm::FunctionCallee EnterCallee,
+                ArrayRef<llvm::Value *> EnterArgs,
+                llvm::FunctionCallee ExitCallee,
+                ArrayRef<llvm::Value *> ExitArgs, bool Conditional = false)
       : EnterCallee(EnterCallee), EnterArgs(EnterArgs), ExitCallee(ExitCallee),
         ExitArgs(ExitArgs), Conditional(Conditional) {}
   void Enter(CodeGenFunction &CGF) override {
@@ -1515,14 +1516,14 @@
   // directive.
   auto *ParallelFnTy =
       llvm::FunctionType::get(CGM.VoidTy, {CGM.Int16Ty, CGM.Int32Ty},
-                              /*isVarArg=*/false)
-          ->getPointerTo();
-  llvm::Value *WorkFnCast = Bld.CreateBitCast(WorkID, ParallelFnTy);
+                              /*isVarArg=*/false);
+  llvm::Value *WorkFnCast =
+      Bld.CreateBitCast(WorkID, ParallelFnTy->getPointerTo());
   // Insert call to work function via shared wrapper. The shared
   // wrapper takes two arguments:
   //   - the parallelism level;
   //   - the thread ID;
-  emitCall(CGF, WST.Loc, WorkFnCast,
+  emitCall(CGF, WST.Loc, {ParallelFnTy, WorkFnCast},
            {Bld.getInt16(/*ParallelLevel=*/0), getThreadID(CGF, WST.Loc)});
   // Go to end of parallel region.
   CGF.EmitBranch(TerminateBB);
@@ -1550,9 +1551,9 @@
 /// implementation.  Specialized for the NVPTX device.
 /// \param Function OpenMP runtime function.
 /// \return Specified function.
-llvm::Constant *
+llvm::FunctionCallee
 CGOpenMPRuntimeNVPTX::createNVPTXRuntimeFunction(unsigned Function) {
-  llvm::Constant *RTLFn = nullptr;
+  llvm::FunctionCallee RTLFn = nullptr;
   switch (static_cast<OpenMPRTLFunctionNVPTX>(Function)) {
   case OMPRTL_NVPTX__kmpc_kernel_init: {
     // Build void __kmpc_kernel_init(kmp_int32 thread_limit, int16_t
@@ -1809,7 +1810,8 @@
     auto *FnTy =
         llvm::FunctionType::get(CGM.VoidTy, TypeParams, /*isVarArg*/ false);
     RTLFn = CGM.CreateRuntimeFunction(FnTy, /*Name*/ "__kmpc_barrier");
-    cast<llvm::Function>(RTLFn)->addFnAttr(llvm::Attribute::Convergent);
+    cast<llvm::Function>(RTLFn.getCallee())
+        ->addFnAttr(llvm::Attribute::Convergent);
     break;
   }
   case OMPRTL__kmpc_barrier_simple_spmd: {
@@ -1820,7 +1822,8 @@
         llvm::FunctionType::get(CGM.VoidTy, TypeParams, /*isVarArg*/ false);
     RTLFn =
         CGM.CreateRuntimeFunction(FnTy, /*Name*/ "__kmpc_barrier_simple_spmd");
-    cast<llvm::Function>(RTLFn)->addFnAttr(llvm::Attribute::Convergent);
+    cast<llvm::Function>(RTLFn.getCallee())
+        ->addFnAttr(llvm::Attribute::Convergent);
     break;
   }
   }
@@ -1931,7 +1934,7 @@
                                               const Expr *ThreadLimit,
                                               SourceLocation Loc) {}
 
-llvm::Value *CGOpenMPRuntimeNVPTX::emitParallelOutlinedFunction(
+llvm::Function *CGOpenMPRuntimeNVPTX::emitParallelOutlinedFunction(
     const OMPExecutableDirective &D, const VarDecl *ThreadIDVar,
     OpenMPDirectiveKind InnermostKind, const RegionCodeGenTy &CodeGen) {
   // Emit target region as a standalone region.
@@ -2008,7 +2011,7 @@
   }
 }
 
-llvm::Value *CGOpenMPRuntimeNVPTX::emitTeamsOutlinedFunction(
+llvm::Function *CGOpenMPRuntimeNVPTX::emitTeamsOutlinedFunction(
     const OMPExecutableDirective &D, const VarDecl *ThreadIDVar,
     OpenMPDirectiveKind InnermostKind, const RegionCodeGenTy &CodeGen) {
   SourceLocation Loc = D.getBeginLoc();
@@ -2071,9 +2074,8 @@
     }
   } Action(Loc, GlobalizedRD, MappedDeclsFields);
   CodeGen.setAction(Action);
-  llvm::Value *OutlinedFunVal = CGOpenMPRuntime::emitTeamsOutlinedFunction(
+  llvm::Function *OutlinedFun = CGOpenMPRuntime::emitTeamsOutlinedFunction(
       D, ThreadIDVar, InnermostKind, CodeGen);
-  llvm::Function *OutlinedFun = cast<llvm::Function>(OutlinedFunVal);
   OutlinedFun->removeFnAttr(llvm::Attribute::NoInline);
   OutlinedFun->removeFnAttr(llvm::Attribute::OptimizeNone);
   OutlinedFun->addFnAttr(llvm::Attribute::AlwaysInline);
@@ -2432,7 +2434,7 @@
 void CGOpenMPRuntimeNVPTX::emitTeamsCall(CodeGenFunction &CGF,
                                          const OMPExecutableDirective &D,
                                          SourceLocation Loc,
-                                         llvm::Value *OutlinedFn,
+                                         llvm::Function *OutlinedFn,
                                          ArrayRef<llvm::Value *> CapturedVars) {
   if (!CGF.HaveInsertPoint())
     return;
@@ -2449,7 +2451,7 @@
 }
 
 void CGOpenMPRuntimeNVPTX::emitParallelCall(
-    CodeGenFunction &CGF, SourceLocation Loc, llvm::Value *OutlinedFn,
+    CodeGenFunction &CGF, SourceLocation Loc, llvm::Function *OutlinedFn,
     ArrayRef<llvm::Value *> CapturedVars, const Expr *IfCond) {
   if (!CGF.HaveInsertPoint())
     return;
@@ -2628,7 +2630,7 @@
 }
 
 void CGOpenMPRuntimeNVPTX::emitSPMDParallelCall(
-    CodeGenFunction &CGF, SourceLocation Loc, llvm::Value *OutlinedFn,
+    CodeGenFunction &CGF, SourceLocation Loc, llvm::Function *OutlinedFn,
     ArrayRef<llvm::Value *> CapturedVars, const Expr *IfCond) {
   // Just call the outlined function to execute the parallel region.
   // OutlinedFn(&GTid, &zero, CapturedStruct);
@@ -3421,9 +3423,9 @@
 ///   (2k+1)th thread is ignored in the value aggregation.  Therefore
 ///   we copy the Reduce list from the (2k+1)th lane to (k+1)th lane so
 ///   that the contiguity assumption still holds.
-static llvm::Value *emitShuffleAndReduceFunction(
+static llvm::Function *emitShuffleAndReduceFunction(
     CodeGenModule &CGM, ArrayRef<const Expr *> Privates,
-    QualType ReductionArrayTy, llvm::Value *ReduceFn, SourceLocation Loc) {
+    QualType ReductionArrayTy, llvm::Function *ReduceFn, SourceLocation Loc) {
   ASTContext &C = CGM.getContext();
 
   // Thread local Reduce list used to host the values of data to be reduced.
@@ -3887,10 +3889,10 @@
     llvm::Value *ReductionArrayTySize = CGF.getTypeSize(ReductionArrayTy);
     llvm::Value *RL = CGF.Builder.CreatePointerBitCastOrAddrSpaceCast(
         ReductionList.getPointer(), CGF.VoidPtrTy);
-    llvm::Value *ReductionFn = emitReductionFunction(
+    llvm::Function *ReductionFn = emitReductionFunction(
         CGM, Loc, CGF.ConvertTypeForMem(ReductionArrayTy)->getPointerTo(),
         Privates, LHSExprs, RHSExprs, ReductionOps);
-    llvm::Value *ShuffleAndReduceFn = emitShuffleAndReduceFunction(
+    llvm::Function *ShuffleAndReduceFn = emitShuffleAndReduceFunction(
         CGM, Privates, ReductionArrayTy, ReductionFn, Loc);
     llvm::Value *InterWarpCopyFn =
         emitInterWarpCopyFunction(CGM, Privates, ReductionArrayTy, Loc);
@@ -4037,12 +4039,11 @@
 }
 
 void CGOpenMPRuntimeNVPTX::emitOutlinedFunctionCall(
-    CodeGenFunction &CGF, SourceLocation Loc, llvm::Value *OutlinedFn,
+    CodeGenFunction &CGF, SourceLocation Loc, llvm::FunctionCallee OutlinedFn,
     ArrayRef<llvm::Value *> Args) const {
   SmallVector<llvm::Value *, 4> TargetArgs;
   TargetArgs.reserve(Args.size());
-  auto *FnType =
-      cast<llvm::FunctionType>(OutlinedFn->getType()->getPointerElementType());
+  auto *FnType = OutlinedFn.getFunctionType();
   for (unsigned I = 0, E = Args.size(); I < E; ++I) {
     if (FnType->isVarArg() && FnType->getNumParams() <= I) {
       TargetArgs.append(std::next(Args.begin(), I), Args.end());
diff --git a/clang/lib/CodeGen/CGStmtOpenMP.cpp b/clang/lib/CodeGen/CGStmtOpenMP.cpp
--- a/clang/lib/CodeGen/CGStmtOpenMP.cpp
+++ b/clang/lib/CodeGen/CGStmtOpenMP.cpp
@@ -1225,7 +1225,7 @@
     OpenMPDirectiveKind InnermostKind, const RegionCodeGenTy &CodeGen,
     const CodeGenBoundParametersTy &CodeGenBoundParameters) {
   const CapturedStmt *CS = S.getCapturedStmt(OMPD_parallel);
-  llvm::Value *OutlinedFn =
+  llvm::Function *OutlinedFn =
       CGF.CGM.getOpenMPRuntime().emitParallelOutlinedFunction(
           S, *CS->getCapturedDecl()->param_begin(), InnermostKind, CodeGen);
   if (const auto *NumThreadsClause = S.getSingleClause<OMPNumThreadsClause>()) {
@@ -2891,6 +2891,8 @@
     OMPPrivateScope Scope(CGF);
     if (!Data.PrivateVars.empty() || !Data.FirstprivateVars.empty() ||
         !Data.LastprivateVars.empty()) {
+      llvm::FunctionType *CopyFnTy = llvm::FunctionType::get(
+          CGF.Builder.getVoidTy(), {CGF.Builder.getInt8PtrTy()}, true);
       enum { PrivatesParam = 2, CopyFnParam = 3 };
       llvm::Value *CopyFn = CGF.Builder.CreateLoad(
           CGF.GetAddrOfLocalVar(CS->getCapturedDecl()->getParam(CopyFnParam)));
@@ -2923,8 +2925,8 @@
         PrivatePtrs.emplace_back(VD, PrivatePtr);
         CallArgs.push_back(PrivatePtr.getPointer());
       }
-      CGF.CGM.getOpenMPRuntime().emitOutlinedFunctionCall(CGF, S.getBeginLoc(),
-                                                          CopyFn, CallArgs);
+      CGF.CGM.getOpenMPRuntime().emitOutlinedFunctionCall(
+          CGF, S.getBeginLoc(), {CopyFnTy, CopyFn}, CallArgs);
       for (const auto &Pair : LastprivateDstsOrigs) {
         const auto *OrigVD = cast<VarDecl>(Pair.second->getDecl());
         DeclRefExpr DRE(CGF.getContext(), const_cast<VarDecl *>(OrigVD),
@@ -3026,7 +3028,7 @@
     Action.Enter(CGF);
     BodyGen(CGF);
   };
-  llvm::Value *OutlinedFn = CGM.getOpenMPRuntime().emitTaskOutlinedFunction(
+  llvm::Function *OutlinedFn = CGM.getOpenMPRuntime().emitTaskOutlinedFunction(
       S, *I, *PartId, *TaskT, S.getDirectiveKind(), CodeGen, Data.Tied,
       Data.NumberOfParts);
   OMPLexicalScope Scope(*this, S);
@@ -3125,6 +3127,8 @@
     // Set proper addresses for generated private copies.
     OMPPrivateScope Scope(CGF);
     if (!Data.FirstprivateVars.empty()) {
+      llvm::FunctionType *CopyFnTy = llvm::FunctionType::get(
+          CGF.Builder.getVoidTy(), {CGF.Builder.getInt8PtrTy()}, true);
       enum { PrivatesParam = 2, CopyFnParam = 3 };
       llvm::Value *CopyFn = CGF.Builder.CreateLoad(
           CGF.GetAddrOfLocalVar(CS->getCapturedDecl()->getParam(CopyFnParam)));
@@ -3142,8 +3146,8 @@
         PrivatePtrs.emplace_back(VD, PrivatePtr);
         CallArgs.push_back(PrivatePtr.getPointer());
       }
-      CGF.CGM.getOpenMPRuntime().emitOutlinedFunctionCall(CGF, S.getBeginLoc(),
-                                                          CopyFn, CallArgs);
+      CGF.CGM.getOpenMPRuntime().emitOutlinedFunctionCall(
+          CGF, S.getBeginLoc(), {CopyFnTy, CopyFn}, CallArgs);
       for (const auto &Pair : PrivatePtrs) {
         Address Replacement(CGF.Builder.CreateLoad(Pair.second),
                             CGF.getContext().getDeclAlign(Pair.first));
@@ -3165,7 +3169,7 @@
     OMPLexicalScope LexScope(CGF, S, OMPD_task, /*EmitPreInitStmt=*/false);
     BodyGen(CGF);
   };
-  llvm::Value *OutlinedFn = CGM.getOpenMPRuntime().emitTaskOutlinedFunction(
+  llvm::Function *OutlinedFn = CGM.getOpenMPRuntime().emitTaskOutlinedFunction(
       S, *I, *PartId, *TaskT, S.getDirectiveKind(), CodeGen, /*Tied=*/true,
       Data.NumberOfParts);
   llvm::APInt TrueOrFalse(32, S.hasClausesOfKind<OMPNowaitClause>() ? 1 : 0);
@@ -3198,7 +3202,7 @@
     CGF.EmitStmt(CS->getCapturedStmt());
   };
   auto &&TaskGen = [&S, SharedsTy, CapturedStruct,
-                    IfCond](CodeGenFunction &CGF, llvm::Value *OutlinedFn,
+                    IfCond](CodeGenFunction &CGF, llvm::Function *OutlinedFn,
                             const OMPTaskDataTy &Data) {
     CGF.CGM.getOpenMPRuntime().emitTaskCall(CGF, S.getBeginLoc(), S, OutlinedFn,
                                             SharedsTy, CapturedStruct, IfCond,
@@ -4123,7 +4127,7 @@
                                         OpenMPDirectiveKind InnermostKind,
                                         const RegionCodeGenTy &CodeGen) {
   const CapturedStmt *CS = S.getCapturedStmt(OMPD_teams);
-  llvm::Value *OutlinedFn =
+  llvm::Function *OutlinedFn =
       CGF.CGM.getOpenMPRuntime().emitTeamsOutlinedFunction(
           S, *CS->getCapturedDecl()->param_begin(), InnermostKind, CodeGen);
 
@@ -4969,7 +4973,7 @@
     }
   };
   auto &&TaskGen = [&S, SharedsTy, CapturedStruct,
-                    IfCond](CodeGenFunction &CGF, llvm::Value *OutlinedFn,
+                    IfCond](CodeGenFunction &CGF, llvm::Function *OutlinedFn,
                             const OMPTaskDataTy &Data) {
     auto &&CodeGen = [&S, OutlinedFn, SharedsTy, CapturedStruct, IfCond,
                       &Data](CodeGenFunction &CGF, PrePostActionTy &) {
diff --git a/clang/lib/CodeGen/CGVTables.cpp b/clang/lib/CodeGen/CGVTables.cpp
--- a/clang/lib/CodeGen/CGVTables.cpp
+++ b/clang/lib/CodeGen/CGVTables.cpp
@@ -648,7 +648,8 @@
     auto getSpecialVirtualFn = [&](StringRef name) {
       llvm::FunctionType *fnTy =
           llvm::FunctionType::get(CGM.VoidTy, /*isVarArg=*/false);
-      llvm::Constant *fn = CGM.CreateRuntimeFunction(fnTy, name);
+      llvm::Constant *fn = cast<llvm::Constant>(
+          CGM.CreateRuntimeFunction(fnTy, name).getCallee());
       if (auto f = dyn_cast<llvm::Function>(fn))
         f->setUnnamedAddr(llvm::GlobalValue::UnnamedAddr::Global);
       return llvm::ConstantExpr::getBitCast(fn, CGM.Int8PtrTy);
diff --git a/clang/lib/CodeGen/CodeGenFunction.h b/clang/lib/CodeGen/CodeGenFunction.h
--- a/clang/lib/CodeGen/CodeGenFunction.h
+++ b/clang/lib/CodeGen/CodeGenFunction.h
@@ -566,7 +566,7 @@
     JumpDest RethrowDest;
 
     /// A function to call to enter the catch.
-    llvm::Constant *BeginCatchFn;
+    llvm::FunctionCallee BeginCatchFn;
 
     /// An i1 variable indicating whether or not the @finally is
     /// running for an exception.
@@ -578,8 +578,8 @@
 
   public:
     void enter(CodeGenFunction &CGF, const Stmt *Finally,
-               llvm::Constant *beginCatchFn, llvm::Constant *endCatchFn,
-               llvm::Constant *rethrowFn);
+               llvm::FunctionCallee beginCatchFn,
+               llvm::FunctionCallee endCatchFn, llvm::FunctionCallee rethrowFn);
     void exit(CodeGenFunction &CGF);
   };
 
@@ -3087,7 +3087,7 @@
   bool EmitOMPLinearClauseInit(const OMPLoopDirective &D);
 
   typedef const llvm::function_ref<void(CodeGenFunction & /*CGF*/,
-                                        llvm::Value * /*OutlinedFn*/,
+                                        llvm::Function * /*OutlinedFn*/,
                                         const OMPTaskDataTy & /*Data*/)>
       TaskGenTy;
   void EmitOMPTaskBasedDirective(const OMPExecutableDirective &S,
@@ -3598,30 +3598,30 @@
 
   void checkTargetFeatures(const CallExpr *E, const FunctionDecl *TargetDecl);
 
-  llvm::CallInst *EmitRuntimeCall(llvm::Value *callee,
+  llvm::CallInst *EmitRuntimeCall(llvm::FunctionCallee callee,
                                   const Twine &name = "");
-  llvm::CallInst *EmitRuntimeCall(llvm::Value *callee,
-                                  ArrayRef<llvm::Value*> args,
+  llvm::CallInst *EmitRuntimeCall(llvm::FunctionCallee callee,
+                                  ArrayRef<llvm::Value *> args,
                                   const Twine &name = "");
-  llvm::CallInst *EmitNounwindRuntimeCall(llvm::Value *callee,
+  llvm::CallInst *EmitNounwindRuntimeCall(llvm::FunctionCallee callee,
                                           const Twine &name = "");
-  llvm::CallInst *EmitNounwindRuntimeCall(llvm::Value *callee,
-                                          ArrayRef<llvm::Value*> args,
+  llvm::CallInst *EmitNounwindRuntimeCall(llvm::FunctionCallee callee,
+                                          ArrayRef<llvm::Value *> args,
                                           const Twine &name = "");
 
   SmallVector<llvm::OperandBundleDef, 1>
   getBundlesForFunclet(llvm::Value *Callee);
 
-  llvm::CallBase *EmitCallOrInvoke(llvm::Value *Callee,
+  llvm::CallBase *EmitCallOrInvoke(llvm::FunctionCallee Callee,
                                    ArrayRef<llvm::Value *> Args,
                                    const Twine &Name = "");
-  llvm::CallBase *EmitRuntimeCallOrInvoke(llvm::Value *callee,
+  llvm::CallBase *EmitRuntimeCallOrInvoke(llvm::FunctionCallee callee,
                                           ArrayRef<llvm::Value *> args,
                                           const Twine &name = "");
-  llvm::CallBase *EmitRuntimeCallOrInvoke(llvm::Value *callee,
+  llvm::CallBase *EmitRuntimeCallOrInvoke(llvm::FunctionCallee callee,
                                           const Twine &name = "");
-  void EmitNoreturnRuntimeCallOrInvoke(llvm::Value *callee,
-                                       ArrayRef<llvm::Value*> args);
+  void EmitNoreturnRuntimeCallOrInvoke(llvm::FunctionCallee callee,
+                                       ArrayRef<llvm::Value *> args);
 
   CGCallee BuildAppleKextVirtualCall(const CXXMethodDecl *MD,
                                      NestedNameSpecifier *Qual,
diff --git a/clang/lib/CodeGen/CodeGenModule.h b/clang/lib/CodeGen/CodeGenModule.h
--- a/clang/lib/CodeGen/CodeGenModule.h
+++ b/clang/lib/CodeGen/CodeGenModule.h
@@ -119,90 +119,90 @@
   ObjCEntrypoints() { memset(this, 0, sizeof(*this)); }
 
   /// void objc_alloc(id);
-  llvm::Constant *objc_alloc;
+  llvm::FunctionCallee objc_alloc;
 
   /// void objc_allocWithZone(id);
-  llvm::Constant *objc_allocWithZone;
+  llvm::FunctionCallee objc_allocWithZone;
 
   /// void objc_autoreleasePoolPop(void*);
-  llvm::Constant *objc_autoreleasePoolPop;
+  llvm::FunctionCallee objc_autoreleasePoolPop;
 
   /// void objc_autoreleasePoolPop(void*);
   /// Note this method is used when we are using exception handling
-  llvm::Constant *objc_autoreleasePoolPopInvoke;
+  llvm::FunctionCallee objc_autoreleasePoolPopInvoke;
 
   /// void *objc_autoreleasePoolPush(void);
-  llvm::Constant *objc_autoreleasePoolPush;
+  llvm::Function *objc_autoreleasePoolPush;
 
   /// id objc_autorelease(id);
-  llvm::Constant *objc_autorelease;
+  llvm::Function *objc_autorelease;
 
   /// id objc_autorelease(id);
   /// Note this is the runtime method not the intrinsic.
-  llvm::Constant *objc_autoreleaseRuntimeFunction;
+  llvm::FunctionCallee objc_autoreleaseRuntimeFunction;
 
   /// id objc_autoreleaseReturnValue(id);
-  llvm::Constant *objc_autoreleaseReturnValue;
+  llvm::Function *objc_autoreleaseReturnValue;
 
   /// void objc_copyWeak(id *dest, id *src);
-  llvm::Constant *objc_copyWeak;
+  llvm::Function *objc_copyWeak;
 
   /// void objc_destroyWeak(id*);
-  llvm::Constant *objc_destroyWeak;
+  llvm::Function *objc_destroyWeak;
 
   /// id objc_initWeak(id*, id);
-  llvm::Constant *objc_initWeak;
+  llvm::Function *objc_initWeak;
 
   /// id objc_loadWeak(id*);
-  llvm::Constant *objc_loadWeak;
+  llvm::Function *objc_loadWeak;
 
   /// id objc_loadWeakRetained(id*);
-  llvm::Constant *objc_loadWeakRetained;
+  llvm::Function *objc_loadWeakRetained;
 
   /// void objc_moveWeak(id *dest, id *src);
-  llvm::Constant *objc_moveWeak;
+  llvm::Function *objc_moveWeak;
 
   /// id objc_retain(id);
-  llvm::Constant *objc_retain;
+  llvm::Function *objc_retain;
 
   /// id objc_retain(id);
   /// Note this is the runtime method not the intrinsic.
-  llvm::Constant *objc_retainRuntimeFunction;
+  llvm::FunctionCallee objc_retainRuntimeFunction;
 
   /// id objc_retainAutorelease(id);
-  llvm::Constant *objc_retainAutorelease;
+  llvm::Function *objc_retainAutorelease;
 
   /// id objc_retainAutoreleaseReturnValue(id);
-  llvm::Constant *objc_retainAutoreleaseReturnValue;
+  llvm::Function *objc_retainAutoreleaseReturnValue;
 
   /// id objc_retainAutoreleasedReturnValue(id);
-  llvm::Constant *objc_retainAutoreleasedReturnValue;
+  llvm::Function *objc_retainAutoreleasedReturnValue;
 
   /// id objc_retainBlock(id);
-  llvm::Constant *objc_retainBlock;
+  llvm::Function *objc_retainBlock;
 
   /// void objc_release(id);
-  llvm::Constant *objc_release;
+  llvm::Function *objc_release;
 
   /// void objc_release(id);
   /// Note this is the runtime method not the intrinsic.
-  llvm::Constant *objc_releaseRuntimeFunction;
+  llvm::FunctionCallee objc_releaseRuntimeFunction;
 
   /// void objc_storeStrong(id*, id);
-  llvm::Constant *objc_storeStrong;
+  llvm::Function *objc_storeStrong;
 
   /// id objc_storeWeak(id*, id);
-  llvm::Constant *objc_storeWeak;
+  llvm::Function *objc_storeWeak;
 
   /// id objc_unsafeClaimAutoreleasedReturnValue(id);
-  llvm::Constant *objc_unsafeClaimAutoreleasedReturnValue;
+  llvm::Function *objc_unsafeClaimAutoreleasedReturnValue;
 
   /// A void(void) inline asm to use to mark that the return value of
   /// a call will be immediately retain.
   llvm::InlineAsm *retainAutoreleasedReturnValueMarker;
 
   /// void clang.arc.use(...);
-  llvm::Constant *clang_arc_use;
+  llvm::Function *clang_arc_use;
 };
 
 /// This class records statistics on instrumentation based profiling.
@@ -500,8 +500,8 @@
   llvm::Constant *NSConcreteGlobalBlock = nullptr;
   llvm::Constant *NSConcreteStackBlock = nullptr;
 
-  llvm::Constant *BlockObjectAssign = nullptr;
-  llvm::Constant *BlockObjectDispose = nullptr;
+  llvm::FunctionCallee BlockObjectAssign = nullptr;
+  llvm::FunctionCallee BlockObjectDispose = nullptr;
 
   llvm::Type *BlockDescriptorType = nullptr;
   llvm::Type *GenericBlockLiteralType = nullptr;
@@ -585,7 +585,7 @@
 
   // Version checking function, used to implement ObjC's @available:
   // i32 @__isOSVersionAtLeast(i32, i32, i32)
-  llvm::Constant *IsOSVersionAtLeastFn = nullptr;
+  llvm::FunctionCallee IsOSVersionAtLeastFn = nullptr;
 
   InstrProfStats &getPGOStats() { return PGOStats; }
   llvm::IndexedInstrProfReader *getPGOReader() const { return PGOReader.get(); }
@@ -1002,16 +1002,13 @@
     CXXGlobalDtors.emplace_back(DtorFn, Object);
   }
 
-  /// Create a new runtime function with the specified type and name.
-  llvm::Constant *
+  /// Create or return a runtime function declaration with the specified type
+  /// and name.
+  llvm::FunctionCallee
   CreateRuntimeFunction(llvm::FunctionType *Ty, StringRef Name,
                         llvm::AttributeList ExtraAttrs = llvm::AttributeList(),
                         bool Local = false);
 
-  /// Create a new compiler builtin function with the specified type and name.
-  llvm::Constant *
-  CreateBuiltinFunction(llvm::FunctionType *Ty, StringRef Name,
-                        llvm::AttributeList ExtraAttrs = llvm::AttributeList());
   /// Create a new runtime global variable with the specified type and name.
   llvm::Constant *CreateRuntimeVariable(llvm::Type *Ty,
                                         StringRef Name);
@@ -1021,8 +1018,8 @@
 
   llvm::Constant *getNSConcreteGlobalBlock();
   llvm::Constant *getNSConcreteStackBlock();
-  llvm::Constant *getBlockObjectAssign();
-  llvm::Constant *getBlockObjectDispose();
+  llvm::FunctionCallee getBlockObjectAssign();
+  llvm::FunctionCallee getBlockObjectDispose();
 
   ///@}
 
@@ -1297,7 +1294,7 @@
   getMostBaseClasses(const CXXRecordDecl *RD);
 
   /// Get the declaration of std::terminate for the platform.
-  llvm::Constant *getTerminateFn();
+  llvm::FunctionCallee getTerminateFn();
 
   llvm::SanitizerStatReport &getSanStats();
 
diff --git a/clang/lib/CodeGen/CodeGenModule.cpp b/clang/lib/CodeGen/CodeGenModule.cpp
--- a/clang/lib/CodeGen/CodeGenModule.cpp
+++ b/clang/lib/CodeGen/CodeGenModule.cpp
@@ -2974,7 +2974,7 @@
 
 /// CreateRuntimeFunction - Create a new runtime function with the specified
 /// type and name.
-llvm::Constant *
+llvm::FunctionCallee
 CodeGenModule::CreateRuntimeFunction(llvm::FunctionType *FTy, StringRef Name,
                                      llvm::AttributeList ExtraAttrs,
                                      bool Local) {
@@ -3000,15 +3000,7 @@
     }
   }
 
-  return C;
-}
-
-/// CreateBuiltinFunction - Create a new builtin function with the specified
-/// type and name.
-llvm::Constant *
-CodeGenModule::CreateBuiltinFunction(llvm::FunctionType *FTy, StringRef Name,
-                                     llvm::AttributeList ExtraAttrs) {
-  return CreateRuntimeFunction(FTy, Name, ExtraAttrs, true);
+  return {FTy, C};
 }
 
 /// isTypeConstant - Determine whether an object of this type can be emitted
diff --git a/clang/lib/CodeGen/ItaniumCXXABI.cpp b/clang/lib/CodeGen/ItaniumCXXABI.cpp
--- a/clang/lib/CodeGen/ItaniumCXXABI.cpp
+++ b/clang/lib/CodeGen/ItaniumCXXABI.cpp
@@ -1156,7 +1156,7 @@
   llvm::FunctionType *FTy =
     llvm::FunctionType::get(CGM.VoidTy, /*IsVarArgs=*/false);
 
-  llvm::Constant *Fn = CGM.CreateRuntimeFunction(FTy, "__cxa_rethrow");
+  llvm::FunctionCallee Fn = CGM.CreateRuntimeFunction(FTy, "__cxa_rethrow");
 
   if (isNoReturn)
     CGF.EmitNoreturnRuntimeCallOrInvoke(Fn, None);
@@ -1164,7 +1164,7 @@
     CGF.EmitRuntimeCallOrInvoke(Fn);
 }
 
-static llvm::Constant *getAllocateExceptionFn(CodeGenModule &CGM) {
+static llvm::FunctionCallee getAllocateExceptionFn(CodeGenModule &CGM) {
   // void *__cxa_allocate_exception(size_t thrown_size);
 
   llvm::FunctionType *FTy =
@@ -1173,7 +1173,7 @@
   return CGM.CreateRuntimeFunction(FTy, "__cxa_allocate_exception");
 }
 
-static llvm::Constant *getThrowFn(CodeGenModule &CGM) {
+static llvm::FunctionCallee getThrowFn(CodeGenModule &CGM) {
   // void __cxa_throw(void *thrown_exception, std::type_info *tinfo,
   //                  void (*dest) (void *));
 
@@ -1190,7 +1190,7 @@
   llvm::Type *SizeTy = CGF.ConvertType(getContext().getSizeType());
   uint64_t TypeSize = getContext().getTypeSizeInChars(ThrowType).getQuantity();
 
-  llvm::Constant *AllocExceptionFn = getAllocateExceptionFn(CGM);
+  llvm::FunctionCallee AllocExceptionFn = getAllocateExceptionFn(CGM);
   llvm::CallInst *ExceptionPtr = CGF.EmitNounwindRuntimeCall(
       AllocExceptionFn, llvm::ConstantInt::get(SizeTy, TypeSize), "exception");
 
@@ -1218,7 +1218,7 @@
   CGF.EmitNoreturnRuntimeCallOrInvoke(getThrowFn(CGM), args);
 }
 
-static llvm::Constant *getItaniumDynamicCastFn(CodeGenFunction &CGF) {
+static llvm::FunctionCallee getItaniumDynamicCastFn(CodeGenFunction &CGF) {
   // void *__dynamic_cast(const void *sub,
   //                      const abi::__class_type_info *src,
   //                      const abi::__class_type_info *dst,
@@ -1241,7 +1241,7 @@
   return CGF.CGM.CreateRuntimeFunction(FTy, "__dynamic_cast", Attrs);
 }
 
-static llvm::Constant *getBadCastFn(CodeGenFunction &CGF) {
+static llvm::FunctionCallee getBadCastFn(CodeGenFunction &CGF) {
   // void __cxa_bad_cast();
   llvm::FunctionType *FTy = llvm::FunctionType::get(CGF.VoidTy, false);
   return CGF.CGM.CreateRuntimeFunction(FTy, "__cxa_bad_cast");
@@ -1299,7 +1299,7 @@
   return Offset;
 }
 
-static llvm::Constant *getBadTypeidFn(CodeGenFunction &CGF) {
+static llvm::FunctionCallee getBadTypeidFn(CodeGenFunction &CGF) {
   // void __cxa_bad_typeid();
   llvm::FunctionType *FTy = llvm::FunctionType::get(CGF.VoidTy, false);
 
@@ -1312,7 +1312,7 @@
 }
 
 void ItaniumCXXABI::EmitBadTypeidCall(CodeGenFunction &CGF) {
-  llvm::Value *Fn = getBadTypeidFn(CGF);
+  llvm::FunctionCallee Fn = getBadTypeidFn(CGF);
   llvm::CallBase *Call = CGF.EmitRuntimeCallOrInvoke(Fn);
   Call->setDoesNotReturn();
   CGF.Builder.CreateUnreachable();
@@ -1410,7 +1410,7 @@
 }
 
 bool ItaniumCXXABI::EmitBadCastCall(CodeGenFunction &CGF) {
-  llvm::Value *Fn = getBadCastFn(CGF);
+  llvm::FunctionCallee Fn = getBadCastFn(CGF);
   llvm::CallBase *Call = CGF.EmitRuntimeCallOrInvoke(Fn);
   Call->setDoesNotReturn();
   CGF.Builder.CreateUnreachable();
@@ -1956,7 +1956,7 @@
     CGM.getSanitizerMetadata()->disableSanitizerForInstruction(SI);
     llvm::FunctionType *FTy =
         llvm::FunctionType::get(CGM.VoidTy, NumElementsPtr.getType(), false);
-    llvm::Constant *F =
+    llvm::FunctionCallee F =
         CGM.CreateRuntimeFunction(FTy, "__asan_poison_cxx_array_cookie");
     CGF.Builder.CreateCall(F, NumElementsPtr.getPointer());
   }
@@ -1987,7 +1987,7 @@
   // the metadata may be lost.
   llvm::FunctionType *FTy =
       llvm::FunctionType::get(CGF.SizeTy, CGF.SizeTy->getPointerTo(0), false);
-  llvm::Constant *F =
+  llvm::FunctionCallee F =
       CGM.CreateRuntimeFunction(FTy, "__asan_load_cxx_array_cookie");
   return CGF.Builder.CreateCall(F, numElementsPtr.getPointer());
 }
@@ -2045,8 +2045,8 @@
 
 /*********************** Static local initialization **************************/
 
-static llvm::Constant *getGuardAcquireFn(CodeGenModule &CGM,
-                                         llvm::PointerType *GuardPtrTy) {
+static llvm::FunctionCallee getGuardAcquireFn(CodeGenModule &CGM,
+                                              llvm::PointerType *GuardPtrTy) {
   // int __cxa_guard_acquire(__guard *guard_object);
   llvm::FunctionType *FTy =
     llvm::FunctionType::get(CGM.getTypes().ConvertType(CGM.getContext().IntTy),
@@ -2058,8 +2058,8 @@
                                llvm::Attribute::NoUnwind));
 }
 
-static llvm::Constant *getGuardReleaseFn(CodeGenModule &CGM,
-                                         llvm::PointerType *GuardPtrTy) {
+static llvm::FunctionCallee getGuardReleaseFn(CodeGenModule &CGM,
+                                              llvm::PointerType *GuardPtrTy) {
   // void __cxa_guard_release(__guard *guard_object);
   llvm::FunctionType *FTy =
     llvm::FunctionType::get(CGM.VoidTy, GuardPtrTy, /*isVarArg=*/false);
@@ -2070,8 +2070,8 @@
                                llvm::Attribute::NoUnwind));
 }
 
-static llvm::Constant *getGuardAbortFn(CodeGenModule &CGM,
-                                       llvm::PointerType *GuardPtrTy) {
+static llvm::FunctionCallee getGuardAbortFn(CodeGenModule &CGM,
+                                            llvm::PointerType *GuardPtrTy) {
   // void __cxa_guard_abort(__guard *guard_object);
   llvm::FunctionType *FTy =
     llvm::FunctionType::get(CGM.VoidTy, GuardPtrTy, /*isVarArg=*/false);
@@ -2305,8 +2305,8 @@
     llvm::FunctionType::get(CGF.IntTy, paramTys, false);
 
   // Fetch the actual function.
-  llvm::Constant *atexit = CGF.CGM.CreateRuntimeFunction(atexitTy, Name);
-  if (llvm::Function *fn = dyn_cast<llvm::Function>(atexit))
+  llvm::FunctionCallee atexit = CGF.CGM.CreateRuntimeFunction(atexitTy, Name);
+  if (llvm::Function *fn = dyn_cast<llvm::Function>(atexit.getCallee()))
     fn->setDoesNotThrow();
 
   // Create a variable that binds the atexit to this shared object.
@@ -3913,7 +3913,7 @@
   }
 }
 
-static llvm::Constant *getBeginCatchFn(CodeGenModule &CGM) {
+static llvm::FunctionCallee getBeginCatchFn(CodeGenModule &CGM) {
   // void *__cxa_begin_catch(void*);
   llvm::FunctionType *FTy = llvm::FunctionType::get(
       CGM.Int8PtrTy, CGM.Int8PtrTy, /*IsVarArgs=*/false);
@@ -3921,7 +3921,7 @@
   return CGM.CreateRuntimeFunction(FTy, "__cxa_begin_catch");
 }
 
-static llvm::Constant *getEndCatchFn(CodeGenModule &CGM) {
+static llvm::FunctionCallee getEndCatchFn(CodeGenModule &CGM) {
   // void __cxa_end_catch();
   llvm::FunctionType *FTy =
       llvm::FunctionType::get(CGM.VoidTy, /*IsVarArgs=*/false);
@@ -3929,7 +3929,7 @@
   return CGM.CreateRuntimeFunction(FTy, "__cxa_end_catch");
 }
 
-static llvm::Constant *getGetExceptionPtrFn(CodeGenModule &CGM) {
+static llvm::FunctionCallee getGetExceptionPtrFn(CodeGenModule &CGM) {
   // void *__cxa_get_exception_ptr(void*);
   llvm::FunctionType *FTy = llvm::FunctionType::get(
       CGM.Int8PtrTy, CGM.Int8PtrTy, /*IsVarArgs=*/false);
@@ -4204,14 +4204,14 @@
 /// Get or define the following function:
 ///   void @__clang_call_terminate(i8* %exn) nounwind noreturn
 /// This code is used only in C++.
-static llvm::Constant *getClangCallTerminateFn(CodeGenModule &CGM) {
+static llvm::FunctionCallee getClangCallTerminateFn(CodeGenModule &CGM) {
   llvm::FunctionType *fnTy =
     llvm::FunctionType::get(CGM.VoidTy, CGM.Int8PtrTy, /*IsVarArgs=*/false);
-  llvm::Constant *fnRef = CGM.CreateRuntimeFunction(
-      fnTy, "__clang_call_terminate", llvm::AttributeList(), /*Local=*/true);
-
-  llvm::Function *fn = dyn_cast<llvm::Function>(fnRef);
-  if (fn && fn->empty()) {
+  llvm::FunctionCallee fnRef = CGM.CreateRuntimeFunction(
+      fnTy, "__clang_call_terminate", llvm::AttributeList(), /*IsLocal=*/true);
+  llvm::Function *fn =
+      cast<llvm::Function>(fnRef.getCallee()->stripPointerCasts());
+  if (fn->empty()) {
     fn->setDoesNotThrow();
     fn->setDoesNotReturn();
 
@@ -4229,7 +4229,7 @@
 
     // Set up the function.
     llvm::BasicBlock *entry =
-      llvm::BasicBlock::Create(CGM.getLLVMContext(), "", fn);
+        llvm::BasicBlock::Create(CGM.getLLVMContext(), "", fn);
     CGBuilderTy builder(CGM, entry);
 
     // Pull the exception pointer out of the parameter list.
@@ -4249,7 +4249,6 @@
     // std::terminate cannot return.
     builder.CreateUnreachable();
   }
-
   return fnRef;
 }
 
diff --git a/clang/lib/CodeGen/MicrosoftCXXABI.cpp b/clang/lib/CodeGen/MicrosoftCXXABI.cpp
--- a/clang/lib/CodeGen/MicrosoftCXXABI.cpp
+++ b/clang/lib/CodeGen/MicrosoftCXXABI.cpp
@@ -724,18 +724,20 @@
     return ThrowInfoType;
   }
 
-  llvm::Constant *getThrowFn() {
+  llvm::FunctionCallee getThrowFn() {
     // _CxxThrowException is passed an exception object and a ThrowInfo object
     // which describes the exception.
     llvm::Type *Args[] = {CGM.Int8PtrTy, getThrowInfoType()->getPointerTo()};
     llvm::FunctionType *FTy =
         llvm::FunctionType::get(CGM.VoidTy, Args, /*IsVarArgs=*/false);
-    auto *Fn = cast<llvm::Function>(
-        CGM.CreateRuntimeFunction(FTy, "_CxxThrowException"));
+    llvm::FunctionCallee Throw =
+        CGM.CreateRuntimeFunction(FTy, "_CxxThrowException");
     // _CxxThrowException is stdcall on 32-bit x86 platforms.
-    if (CGM.getTarget().getTriple().getArch() == llvm::Triple::x86)
-      Fn->setCallingConv(llvm::CallingConv::X86_StdCall);
-    return Fn;
+    if (CGM.getTarget().getTriple().getArch() == llvm::Triple::x86) {
+      if (auto *Fn = cast<llvm::Function>(Throw.getCallee()))
+        Fn->setCallingConv(llvm::CallingConv::X86_StdCall);
+    }
+    return Throw;
   }
 
   llvm::Function *getAddrOfCXXCtorClosure(const CXXConstructorDecl *CD,
@@ -851,7 +853,7 @@
   llvm::Value *Args[] = {
       llvm::ConstantPointerNull::get(CGM.Int8PtrTy),
       llvm::ConstantPointerNull::get(getThrowInfoType()->getPointerTo())};
-  auto *Fn = getThrowFn();
+  llvm::FunctionCallee Fn = getThrowFn();
   if (isNoReturn)
     CGF.EmitNoreturnRuntimeCallOrInvoke(Fn, Args);
   else
@@ -931,7 +933,7 @@
   llvm::FunctionType *FTy =
       llvm::FunctionType::get(CGF.Int8PtrTy, ArgTypes, false);
   llvm::Value *Args[] = {Argument};
-  llvm::Constant *Fn = CGF.CGM.CreateRuntimeFunction(FTy, "__RTtypeid");
+  llvm::FunctionCallee Fn = CGF.CGM.CreateRuntimeFunction(FTy, "__RTtypeid");
   return CGF.EmitRuntimeCallOrInvoke(Fn, Args);
 }
 
@@ -983,7 +985,7 @@
   //   BOOL isReference)
   llvm::Type *ArgTypes[] = {CGF.Int8PtrTy, CGF.Int32Ty, CGF.Int8PtrTy,
                             CGF.Int8PtrTy, CGF.Int32Ty};
-  llvm::Constant *Function = CGF.CGM.CreateRuntimeFunction(
+  llvm::FunctionCallee Function = CGF.CGM.CreateRuntimeFunction(
       llvm::FunctionType::get(CGF.Int8PtrTy, ArgTypes, false),
       "__RTDynamicCast");
   llvm::Value *Args[] = {
@@ -1003,7 +1005,7 @@
   // PVOID __RTCastToVoid(
   //   PVOID inptr)
   llvm::Type *ArgTypes[] = {CGF.Int8PtrTy};
-  llvm::Constant *Function = CGF.CGM.CreateRuntimeFunction(
+  llvm::FunctionCallee Function = CGF.CGM.CreateRuntimeFunction(
       llvm::FunctionType::get(CGF.Int8PtrTy, ArgTypes, false),
       "__RTCastToVoid");
   llvm::Value *Args[] = {Value.getPointer()};
@@ -2229,9 +2231,10 @@
   llvm::FunctionType *TLRegDtorTy = llvm::FunctionType::get(
       CGF.IntTy, DtorStub->getType(), /*IsVarArg=*/false);
 
-  llvm::Constant *TLRegDtor = CGF.CGM.CreateRuntimeFunction(
+  llvm::FunctionCallee TLRegDtor = CGF.CGM.CreateRuntimeFunction(
       TLRegDtorTy, "__tlregdtor", llvm::AttributeList(), /*Local=*/true);
-  if (llvm::Function *TLRegDtorFn = dyn_cast<llvm::Function>(TLRegDtor))
+  if (llvm::Function *TLRegDtorFn =
+          dyn_cast<llvm::Function>(TLRegDtor.getCallee()))
     TLRegDtorFn->setDoesNotThrow();
 
   CGF.EmitNounwindRuntimeCall(TLRegDtor, DtorStub);
@@ -2323,7 +2326,7 @@
   return ConstantAddress(GV, Align);
 }
 
-static llvm::Constant *getInitThreadHeaderFn(CodeGenModule &CGM) {
+static llvm::FunctionCallee getInitThreadHeaderFn(CodeGenModule &CGM) {
   llvm::FunctionType *FTy =
       llvm::FunctionType::get(llvm::Type::getVoidTy(CGM.getLLVMContext()),
                               CGM.IntTy->getPointerTo(), /*isVarArg=*/false);
@@ -2335,7 +2338,7 @@
       /*Local=*/true);
 }
 
-static llvm::Constant *getInitThreadFooterFn(CodeGenModule &CGM) {
+static llvm::FunctionCallee getInitThreadFooterFn(CodeGenModule &CGM) {
   llvm::FunctionType *FTy =
       llvm::FunctionType::get(llvm::Type::getVoidTy(CGM.getLLVMContext()),
                               CGM.IntTy->getPointerTo(), /*isVarArg=*/false);
@@ -2347,7 +2350,7 @@
       /*Local=*/true);
 }
 
-static llvm::Constant *getInitThreadAbortFn(CodeGenModule &CGM) {
+static llvm::FunctionCallee getInitThreadAbortFn(CodeGenModule &CGM) {
   llvm::FunctionType *FTy =
       llvm::FunctionType::get(llvm::Type::getVoidTy(CGM.getLLVMContext()),
                               CGM.IntTy->getPointerTo(), /*isVarArg=*/false);