[Alignment][Clang][NFC] Add CharUnits::getAsAlign

[gchatelet]

Summary

This is a prerequisite to removing llvm::GlobalObject::setAlignment(unsigned).
This is patch is part of a series to introduce an Alignment type.
See this thread for context: http://lists.llvm.org/pipermail/llvm-dev/2019-July/133851.html
See this patch for the introduction of the type: https://reviews.llvm.org/D64790

[courbet]

clang/lib/CodeGen/CGObjCMac.cpp

2021

I think the semantic is None here.

6321–6322

I don;t think getABITypeAlignment makes any promisses on the return value.

6762

ditto

6989

ditto

[gchatelet]

clang/lib/CodeGen/CGObjCMac.cpp

6321–6322

It is, I posted a comment on the other patch https://reviews.llvm.org/D68268#inline-614898

[gchatelet]

• Address comments

clang/include/clang/AST/CharUnits.h

 //===--- CharUnits.h - Character units for sizes and offsets ----*- C++ -*-===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
 // See https://llvm.org/LICENSE.txt for license information.
 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 //
 //===----------------------------------------------------------------------===//
 //
 //  This file defines the CharUnits class
 //
 //===----------------------------------------------------------------------===//
 
 #ifndef LLVM_CLANG_AST_CHARUNITS_H
 #define LLVM_CLANG_AST_CHARUNITS_H
 
 #include "llvm/ADT/DenseMapInfo.h"
+#include "llvm/Support/Alignment.h"
 #include "llvm/Support/DataTypes.h"
 #include "llvm/Support/MathExtras.h"
 
 namespace clang {
 
   /// CharUnits - This is an opaque type for sizes expressed in character units.
   /// Instances of this type represent a quantity as a multiple of the size
   /// of the standard C type, char, on the target architecture. As an opaque
public:
       }
 
 
       // Conversions.
 
       /// getQuantity - Get the raw integer representation of this quantity.
       QuantityType getQuantity() const { return Quantity; }
 
+      /// getAsAlign - Returns Quantity as a valid llvm::Align,
+      /// Beware llvm::Align assumes power of two 8-bit bytes.
+      llvm::Align getAsAlign() const { return llvm::Align(Quantity); }
+
       /// alignTo - Returns the next integer (mod 2**64) that is
       /// greater than or equal to this quantity and is a multiple of \p Align.
       /// Align must be non-zero.
       CharUnits alignTo(const CharUnits &Align) const {
         return CharUnits(llvm::alignTo(Quantity, Align.Quantity));
       }
 
       /// Given that this is a non-zero alignment value, what is the

clang/lib/CodeGen/CGCUDANV.cpp

llvm::GlobalVariable *GV =
         cast<llvm::GlobalVariable>(ConstStr.getPointer());
     if (!SectionName.empty()) {
       GV->setSection(SectionName);
       // Mark the address as used which make sure that this section isn't
       // merged and we will really have it in the object file.
       GV->setUnnamedAddr(llvm::GlobalValue::UnnamedAddr::None);
     }
     if (Alignment)
-      GV->setAlignment(Alignment);
+      GV->setAlignment(llvm::Align(Alignment));
 
     return llvm::ConstantExpr::getGetElementPtr(ConstStr.getElementType(),
                                                 ConstStr.getPointer(), Zeros);
   }
 
   /// Helper function that generates an empty dummy function returning void.
   llvm::Function *makeDummyFunction(llvm::FunctionType *FnTy) {
     assert(FnTy->getReturnType()->isVoidTy() &&
llvm::BasicBlock *ExitBlock =
         llvm::BasicBlock::Create(Context, "exit", ModuleCtorFunc);
     // The name, size, and initialization pattern of this variable is part
     // of HIP ABI.
     GpuBinaryHandle = new llvm::GlobalVariable(
         TheModule, VoidPtrPtrTy, /*isConstant=*/false,
         Linkage,
         /*Initializer=*/llvm::ConstantPointerNull::get(VoidPtrPtrTy),
         "__hip_gpubin_handle");
-    GpuBinaryHandle->setAlignment(CGM.getPointerAlign().getQuantity());
+    GpuBinaryHandle->setAlignment(CGM.getPointerAlign().getAsAlign());
     // Prevent the weak symbol in different shared libraries being merged.
     if (Linkage != llvm::GlobalValue::InternalLinkage)
       GpuBinaryHandle->setVisibility(llvm::GlobalValue::HiddenVisibility);
     Address GpuBinaryAddr(
         GpuBinaryHandle,
         CharUnits::fromQuantity(GpuBinaryHandle->getAlignment()));
     {
       auto HandleValue = CtorBuilder.CreateLoad(GpuBinaryAddr);
if (IsHIP) {
     // default mode vs. separate compilation!
     // GpuBinaryHandle = __cudaRegisterFatBinary(&FatbinWrapper);
     llvm::CallInst *RegisterFatbinCall = CtorBuilder.CreateCall(
         RegisterFatbinFunc,
         CtorBuilder.CreateBitCast(FatbinWrapper, VoidPtrTy));
     GpuBinaryHandle = new llvm::GlobalVariable(
         TheModule, VoidPtrPtrTy, false, llvm::GlobalValue::InternalLinkage,
         llvm::ConstantPointerNull::get(VoidPtrPtrTy), "__cuda_gpubin_handle");
-    GpuBinaryHandle->setAlignment(CGM.getPointerAlign().getQuantity());
+    GpuBinaryHandle->setAlignment(CGM.getPointerAlign().getAsAlign());
     CtorBuilder.CreateAlignedStore(RegisterFatbinCall, GpuBinaryHandle,
                                    CGM.getPointerAlign());
 
     // Call __cuda_register_globals(GpuBinaryHandle);
     if (RegisterGlobalsFunc)
       CtorBuilder.CreateCall(RegisterGlobalsFunc, RegisterFatbinCall);
 
     // Call __cudaRegisterFatBinaryEnd(Handle) if this CUDA version needs it.

clang/lib/CodeGen/CGCall.cpp

if (llvm::StructType *ArgStruct = CallInfo.getArgStruct()) {
     if (IP) {
       IP = IP->getNextNode();
       AI = new llvm::AllocaInst(ArgStruct, DL.getAllocaAddrSpace(),
                                 "argmem", IP);
     } else {
       AI = CreateTempAlloca(ArgStruct, "argmem");
     }
     auto Align = CallInfo.getArgStructAlignment();
-    AI->setAlignment(llvm::MaybeAlign(Align.getQuantity()));
+    AI->setAlignment(Align.getAsAlign());
     AI->setUsedWithInAlloca(true);
     assert(AI->isUsedWithInAlloca() && !AI->isStaticAlloca());
     ArgMemory = Address(AI, Align);
   }
 
   ClangToLLVMArgMapping IRFunctionArgs(CGM.getContext(), CallInfo);
   SmallVector<llvm::Value *, 16> IRCallArgs(IRFunctionArgs.totalIRArgs());
 

clang/lib/CodeGen/CGCleanup.cpp

void CodeGenFunction::initFullExprCleanupWithFlag(Address ActiveFlag) {
   if (cleanup.isEHCleanup()) cleanup.setTestFlagInEHCleanup();
 }
 
 void EHScopeStack::Cleanup::anchor() {}
 
 static void createStoreInstBefore(llvm::Value *value, Address addr,
                                   llvm::Instruction *beforeInst) {
   auto store = new llvm::StoreInst(value, addr.getPointer(), beforeInst);
-  store->setAlignment(addr.getAlignment().getQuantity());
+  store->setAlignment(addr.getAlignment().getAsAlign());
 }
 
 static llvm::LoadInst *createLoadInstBefore(Address addr, const Twine &name,
                                             llvm::Instruction *beforeInst) {
   auto load = new llvm::LoadInst(addr.getPointer(), name, beforeInst);
-  load->setAlignment(llvm::MaybeAlign(addr.getAlignment().getQuantity()));
+  load->setAlignment(addr.getAlignment().getAsAlign());
   return load;
 }
 
 /// All the branch fixups on the EH stack have propagated out past the
 /// outermost normal cleanup; resolve them all by adding cases to the
 /// given switch instruction.
 static void ResolveAllBranchFixups(CodeGenFunction &CGF,
                                    llvm::SwitchInst *Switch,

clang/lib/CodeGen/CGDecl.cpp

if (Ty.getAddressSpace() == LangAS::opencl_local ||
       D.hasAttr<CUDASharedAttr>())
     Init = llvm::UndefValue::get(LTy);
   else
     Init = EmitNullConstant(Ty);
 
   llvm::GlobalVariable *GV = new llvm::GlobalVariable(
       getModule(), LTy, Ty.isConstant(getContext()), Linkage, Init, Name,
       nullptr, llvm::GlobalVariable::NotThreadLocal, TargetAS);
-  GV->setAlignment(getContext().getDeclAlign(&D).getQuantity());
+  GV->setAlignment(getContext().getDeclAlign(&D).getAsAlign());
 
   if (supportsCOMDAT() && GV->isWeakForLinker())
     GV->setComdat(TheModule.getOrInsertComdat(GV->getName()));
 
   if (D.getTLSKind())
     setTLSMode(GV, D);
 
   setGVProperties(GV, &D);
void CodeGenFunction::EmitStaticVarDecl(const VarDecl &D,
   // Whatever initializer such variable may have when it gets here is
   // a no-op and should not be emitted.
   bool isCudaSharedVar = getLangOpts().CUDA && getLangOpts().CUDAIsDevice &&
                          D.hasAttr<CUDASharedAttr>();
   // If this value has an initializer, emit it.
   if (D.getInit() && !isCudaSharedVar)
     var = AddInitializerToStaticVarDecl(D, var);
 
-  var->setAlignment(alignment.getQuantity());
+  var->setAlignment(alignment.getAsAlign());
 
   if (D.hasAttr<AnnotateAttr>())
     CGM.AddGlobalAnnotations(&D, var);
 
   if (auto *SA = D.getAttr<PragmaClangBSSSectionAttr>())
     var->addAttribute("bss-section", SA->getName());
   if (auto *SA = D.getAttr<PragmaClangDataSectionAttr>())
     var->addAttribute("data-section", SA->getName());
if (D.hasGlobalStorage())
       Name = getMangledName(&D).str() + ".const";
     else if (const DeclContext *DC = D.getParentFunctionOrMethod())
       Name = ("__const." + FunctionName(DC) + "." + D.getName()).str();
     else
       llvm_unreachable("local variable has no parent function or method");
     llvm::GlobalVariable *GV = new llvm::GlobalVariable(
         getModule(), Ty, isConstant, llvm::GlobalValue::PrivateLinkage,
         Constant, Name, InsertBefore, llvm::GlobalValue::NotThreadLocal, AS);
-    GV->setAlignment(Align.getQuantity());
+    GV->setAlignment(Align.getAsAlign());
     GV->setUnnamedAddr(llvm::GlobalValue::UnnamedAddr::Global);
     CacheEntry = GV;
   } else if (CacheEntry->getAlignment() < Align.getQuantity()) {
-    CacheEntry->setAlignment(Align.getQuantity());
+    CacheEntry->setAlignment(Align.getAsAlign());
   }
 
   return Address(CacheEntry, Align);
 }
 
 static Address createUnnamedGlobalForMemcpyFrom(CodeGenModule &CGM,
                                                 const VarDecl &D,
                                                 CGBuilderTy &Builder,

clang/lib/CodeGen/CGExpr.cpp

 
 /// CreateTempAlloca - This creates a alloca and inserts it into the entry
 /// block.
 Address CodeGenFunction::CreateTempAllocaWithoutCast(llvm::Type *Ty,
                                                      CharUnits Align,
                                                      const Twine &Name,
                                                      llvm::Value *ArraySize) {
   auto Alloca = CreateTempAlloca(Ty, Name, ArraySize);
-  Alloca->setAlignment(llvm::MaybeAlign(Align.getQuantity()));
+  Alloca->setAlignment(Align.getAsAlign());
   return Address(Alloca, Align);
 }
 
 /// CreateTempAlloca - This creates a alloca and inserts it into the entry
 /// block. The alloca is casted to default address space if necessary.
 Address CodeGenFunction::CreateTempAlloca(llvm::Type *Ty, CharUnits Align,
                                           const Twine &Name,
                                           llvm::Value *ArraySize,
Address CodeGenFunction::CreateDefaultAlignTempAlloca(llvm::Type *Ty,
   CharUnits Align =
     CharUnits::fromQuantity(CGM.getDataLayout().getABITypeAlignment(Ty));
   return CreateTempAlloca(Ty, Align, Name);
 }
 
 void CodeGenFunction::InitTempAlloca(Address Var, llvm::Value *Init) {
   assert(isa<llvm::AllocaInst>(Var.getPointer()));
   auto *Store = new llvm::StoreInst(Init, Var.getPointer());
-  Store->setAlignment(Var.getAlignment().getQuantity());
+  Store->setAlignment(Var.getAlignment().getAsAlign());
   llvm::BasicBlock *Block = AllocaInsertPt->getParent();
   Block->getInstList().insertAfter(AllocaInsertPt->getIterator(), Store);
 }
 
 Address CodeGenFunction::CreateIRTemp(QualType Ty, const Twine &Name) {
   CharUnits Align = getContext().getTypeAlignInChars(Ty);
   return CreateTempAlloca(ConvertType(Ty), Align, Name);
 }
if (CGF.CGM.getCodeGenOpts().MergeAllConstants &&
         if (auto AddrSpace = CGF.getTarget().getConstantAddressSpace()) {
           auto AS = AddrSpace.getValue();
           auto *GV = new llvm::GlobalVariable(
               CGF.CGM.getModule(), Init->getType(), /*isConstant=*/true,
               llvm::GlobalValue::PrivateLinkage, Init, ".ref.tmp", nullptr,
               llvm::GlobalValue::NotThreadLocal,
               CGF.getContext().getTargetAddressSpace(AS));
           CharUnits alignment = CGF.getContext().getTypeAlignInChars(Ty);
-          GV->setAlignment(alignment.getQuantity());
+          GV->setAlignment(alignment.getAsAlign());
           llvm::Constant *C = GV;
           if (AS != LangAS::Default)
             C = TCG.performAddrSpaceCast(
                 CGF.CGM, GV, AS, LangAS::Default,
                 GV->getValueType()->getPointerTo(
                     CGF.getContext().getTargetAddressSpace(LangAS::Default)));
           // FIXME: Should we put the new global into a COMDAT?
           return Address(C, alignment);

clang/lib/CodeGen/CGExprAgg.cpp

if (llvm::Constant *C = Emitter.tryEmitForInitializer(E, AS, ArrayQTy)) {
       auto GV = new llvm::GlobalVariable(
           CGM.getModule(), C->getType(),
           CGM.isTypeConstant(ArrayQTy, /* ExcludeCtorDtor= */ true),
           llvm::GlobalValue::PrivateLinkage, C, "constinit",
           /* InsertBefore= */ nullptr, llvm::GlobalVariable::NotThreadLocal,
           CGM.getContext().getTargetAddressSpace(AS));
       Emitter.finalize(GV);
       CharUnits Align = CGM.getContext().getTypeAlignInChars(ArrayQTy);
-      GV->setAlignment(Align.getQuantity());
+      GV->setAlignment(Align.getAsAlign());
       EmitFinalDestCopy(ArrayQTy, CGF.MakeAddrLValue(GV, ArrayQTy, Align));
       return;
     }
   }
 
   // Exception safety requires us to destroy all the
   // already-constructed members if an initializer throws.
   // For that, we'll need an EH cleanup.

clang/lib/CodeGen/CGExprCXX.cpp

static void EmitNullBaseClassInitialization(CodeGenFunction &CGF,
   if (!NullConstantForBase->isNullValue()) {
     llvm::GlobalVariable *NullVariable = new llvm::GlobalVariable(
         CGF.CGM.getModule(), NullConstantForBase->getType(),
         /*isConstant=*/true, llvm::GlobalVariable::PrivateLinkage,
         NullConstantForBase, Twine());
 
     CharUnits Align = std::max(Layout.getNonVirtualAlignment(),
                                DestPtr.getAlignment());
-    NullVariable->setAlignment(Align.getQuantity());
+    NullVariable->setAlignment(Align.getAsAlign());
 
     Address SrcPtr = Address(CGF.EmitCastToVoidPtr(NullVariable), Align);
 
     // Get and call the appropriate llvm.memcpy overload.
     for (std::pair<CharUnits, CharUnits> Store : Stores) {
       CharUnits StoreOffset = Store.first;
       CharUnits StoreSize = Store.second;
       llvm::Value *StoreSizeVal = CGF.CGM.getSize(StoreSize);

clang/lib/CodeGen/CGExprConstant.cpp

static ConstantAddress tryEmitGlobalCompoundLiteral(CodeGenModule &CGM,
 
   auto GV = new llvm::GlobalVariable(CGM.getModule(), C->getType(),
                                      CGM.isTypeConstant(E->getType(), true),
                                      llvm::GlobalValue::InternalLinkage,
                                      C, ".compoundliteral", nullptr,
                                      llvm::GlobalVariable::NotThreadLocal,
                     CGM.getContext().getTargetAddressSpace(addressSpace));
   emitter.finalize(GV);
-  GV->setAlignment(Align.getQuantity());
+  GV->setAlignment(Align.getAsAlign());
   CGM.setAddrOfConstantCompoundLiteral(E, GV);
   return ConstantAddress(GV, Align);
 }
 
 static llvm::Constant *
 EmitArrayConstant(CodeGenModule &CGM, llvm::ArrayType *DesiredType,
                   llvm::Type *CommonElementType, unsigned ArrayBound,
                   SmallVectorImpl<llvm::Constant *> &Elements,

clang/lib/CodeGen/CGObjCGNU.cpp

class CGObjCGNUstep2 : public CGObjCGNUstep {
 
   llvm::Constant *GenerateEmptyProtocol(StringRef ProtocolName) override {
     std::string Name = SymbolForProtocol(ProtocolName);
     auto *GV = TheModule.getGlobalVariable(Name);
     if (!GV) {
       // Emit a placeholder symbol.
       GV = new llvm::GlobalVariable(TheModule, ProtocolTy, false,
           llvm::GlobalValue::ExternalLinkage, nullptr, Name);
-      GV->setAlignment(CGM.getPointerAlign().getQuantity());
+      GV->setAlignment(CGM.getPointerAlign().getAsAlign());
     }
     return llvm::ConstantExpr::getBitCast(GV, ProtocolPtrTy);
   }
 
   /// Existing protocol references.
   llvm::StringMap<llvm::Constant*> ExistingProtocolRefs;
 
   llvm::Value *GenerateProtocolRef(CodeGenFunction &CGF,
                                    const ObjCProtocolDecl *PD) override {
     auto Name = PD->getNameAsString();
     auto *&Ref = ExistingProtocolRefs[Name];
     if (!Ref) {
       auto *&Protocol = ExistingProtocols[Name];
       if (!Protocol)
         Protocol = GenerateProtocolRef(PD);
       std::string RefName = SymbolForProtocolRef(Name);
       assert(!TheModule.getGlobalVariable(RefName));
       // Emit a reference symbol.
       auto GV = new llvm::GlobalVariable(TheModule, ProtocolPtrTy,
           false, llvm::GlobalValue::LinkOnceODRLinkage,
           llvm::ConstantExpr::getBitCast(Protocol, ProtocolPtrTy), RefName);
       GV->setComdat(TheModule.getOrInsertComdat(RefName));
       GV->setSection(sectionName<ProtocolReferenceSection>());
-      GV->setAlignment(CGM.getPointerAlign().getQuantity());
+      GV->setAlignment(CGM.getPointerAlign().getAsAlign());
       Ref = GV;
     }
     EmittedProtocolRef = true;
     return CGF.Builder.CreateAlignedLoad(Ref, CGM.getPointerAlign());
   }
 
   llvm::Constant *GenerateProtocolList(ArrayRef<llvm::Constant*> Protocols) {
     llvm::ArrayType *ProtocolArrayTy = llvm::ArrayType::get(ProtocolPtrTy,
if (CGM.getTriple().isOSBinFormatCOFF()) {
         auto *Sym = new llvm::GlobalVariable(TheModule, emptyStruct,
             /*isConstant*/false,
             llvm::GlobalValue::LinkOnceODRLinkage, ZeroInit, Prefix +
             Section);
         Sym->setVisibility(llvm::GlobalValue::HiddenVisibility);
         Sym->setSection((Section + SecSuffix).str());
         Sym->setComdat(TheModule.getOrInsertComdat((Prefix +
             Section).str()));
-        Sym->setAlignment(CGM.getPointerAlign().getQuantity());
+        Sym->setAlignment(CGM.getPointerAlign().getAsAlign());
         return Sym;
       };
       return { Sym("__start_", "$a"), Sym("__stop", "$z") };
     }
     auto *Start = new llvm::GlobalVariable(TheModule, PtrTy,
         /*isConstant*/false,
         llvm::GlobalValue::ExternalLinkage, nullptr, StringRef("__start_") +
         Section);
if (CGM.getLangOpts().ObjCRuntime.isNonFragile()) {
     std::string name = "__objc_ivar_offset_value_" +
       Interface->getNameAsString() +"." + Ivar->getNameAsString();
     CharUnits Align = CGM.getIntAlign();
     llvm::Value *Offset = TheModule.getGlobalVariable(name);
     if (!Offset) {
       auto GV = new llvm::GlobalVariable(TheModule, IntTy,
           false, llvm::GlobalValue::LinkOnceAnyLinkage,
           llvm::Constant::getNullValue(IntTy), name);
-      GV->setAlignment(Align.getQuantity());
+      GV->setAlignment(Align.getAsAlign());
       Offset = GV;
     }
     Offset = CGF.Builder.CreateAlignedLoad(Offset, Align);
     if (Offset->getType() != PtrDiffTy)
       Offset = CGF.Builder.CreateZExtOrBitCast(Offset, PtrDiffTy);
     return Offset;
   }
   uint64_t Offset = ComputeIvarBaseOffset(CGF.CGM, Interface, Ivar);

clang/lib/CodeGen/CGObjCMac.cpp

CGObjCCommonMac::GenerateConstantNSString(const StringLiteral *Literal) {
   llvm::GlobalValue::LinkageTypes Linkage = llvm::GlobalValue::PrivateLinkage;
   bool isConstant = !CGM.getLangOpts().WritableStrings;
 
   auto *GV = new llvm::GlobalVariable(CGM.getModule(), C->getType(), isConstant,
                                       Linkage, C, ".str");
   GV->setUnnamedAddr(llvm::GlobalValue::UnnamedAddr::Global);
   // Don't enforce the target's minimum global alignment, since the only use
   // of the string is via this class initializer.
-  GV->setAlignment(1);
+  GV->setAlignment(llvm::Align::None());
   Fields.addBitCast(GV, CGM.Int8PtrTy);
 
   // String length.
   Fields.addInt(CGM.IntTy, StringLength);
 
   // The struct.
   CharUnits Alignment = CGM.getPointerAlign();
   GV = Fields.finishAndCreateGlobal("_unnamed_nsstring_", Alignment,
if (!Entry) {
     // We use the initializer as a marker of whether this is a forward
     // reference or not. At module finalization we add the empty
     // contents for protocols which were referenced but never defined.
     Entry = new llvm::GlobalVariable(CGM.getModule(), ObjCTypes.ProtocolTy,
                                      false, llvm::GlobalValue::PrivateLinkage,
                                      nullptr, "OBJC_PROTOCOL_" + PD->getName());
     Entry->setSection("__OBJC,__protocol,regular,no_dead_strip");
     // FIXME: Is this necessary? Why only for protocol?
-    Entry->setAlignment(4);
+    Entry->setAlignment(llvm::Align(4));
   }
 
   return Entry;
 }
 
 /*
   struct _objc_protocol_extension {
   uint32_t size;
void CGObjCMac::GenerateClass(const ObjCImplementationDecl *ID) {
   const char *Section = "__OBJC,__class,regular,no_dead_strip";
   // Check for a forward reference.
   llvm::GlobalVariable *GV = CGM.getModule().getGlobalVariable(Name, true);
   if (GV) {
     assert(GV->getType()->getElementType() == ObjCTypes.ClassTy &&
            "Forward metaclass reference has incorrect type.");
     values.finishAndSetAsInitializer(GV);
     GV->setSection(Section);
-    GV->setAlignment(CGM.getPointerAlign().getQuantity());
+    GV->setAlignment(CGM.getPointerAlign().getAsAlign());
     CGM.addCompilerUsedGlobal(GV);
   } else
     GV = CreateMetadataVar(Name, values, Section, CGM.getPointerAlign(), true);
   DefinedClasses.push_back(GV);
   ImplementedClasses.push_back(Interface);
   // method definition entries must be clear for next implementation.
   MethodDefinitions.clear();
 }
llvm::GlobalVariable *CGObjCCommonMac::CreateMetadataVar(Twine Name,
                                                          bool AddToUsed) {
   llvm::Type *Ty = Init->getType();
   llvm::GlobalValue::LinkageTypes LT =
       getLinkageTypeForObjCMetadata(CGM, Section);
   llvm::GlobalVariable *GV =
       new llvm::GlobalVariable(CGM.getModule(), Ty, false, LT, Init, Name);
   if (!Section.empty())
     GV->setSection(Section);
-  GV->setAlignment(Align.getQuantity());
+  GV->setAlignment(Align.getAsAlign());
   if (AddToUsed)
     CGM.addCompilerUsedGlobal(GV);
   return GV;
 }
 
 llvm::GlobalVariable *
 CGObjCCommonMac::CreateCStringLiteral(StringRef Name, ObjCLabelType Type,
                                       bool ForceNonFragileABI,
llvm::Constant *Value =
       llvm::ConstantDataArray::getString(VMContext, Name, NullTerminate);
   llvm::GlobalVariable *GV =
       new llvm::GlobalVariable(CGM.getModule(), Value->getType(),
                                /*isConstant=*/true,
                                llvm::GlobalValue::PrivateLinkage, Value, Label);
   if (CGM.getTriple().isOSBinFormatMachO())
     GV->setSection(Section);
   GV->setUnnamedAddr(llvm::GlobalValue::UnnamedAddr::Global);
-  GV->setAlignment(CharUnits::One().getQuantity());
+  GV->setAlignment(CharUnits::One().getAsAlign());
   CGM.addCompilerUsedGlobal(GV);
 
   return GV;
 }
 
 llvm::Function *CGObjCMac::ModuleInitFunction() {
   // Abuse this interface function as a place to finalize.
   FinishModule();
void CGObjCNonFragileABIMac::AddModuleClassList(
   assert((!CGM.getTriple().isOSBinFormatMachO() ||
           SectionName.startswith("__DATA")) &&
          "SectionName expected to start with __DATA on MachO");
   llvm::GlobalValue::LinkageTypes LT =
       getLinkageTypeForObjCMetadata(CGM, SectionName);
   llvm::GlobalVariable *GV =
     new llvm::GlobalVariable(CGM.getModule(), Init->getType(), false, LT, Init,
                              SymbolName);
-  GV->setAlignment(CGM.getDataLayout().getABITypeAlignment(Init->getType()));
+  GV->setAlignment(
+      llvm::Align(CGM.getDataLayout().getABITypeAlignment(Init->getType())));
   GV->setSection(SectionName);
   CGM.addCompilerUsedGlobal(GV);
 }
 
 void CGObjCNonFragileABIMac::FinishNonFragileABIModule() {
   // nonfragile abi has no module definition.
 
   // Build list of all implemented class addresses in array
CGObjCNonFragileABIMac::BuildClassObject(const ObjCInterfaceDecl *CI,
   values.add(ClassRoGV);
 
   llvm::GlobalVariable *GV =
     cast<llvm::GlobalVariable>(GetClassGlobal(CI, isMetaclass, ForDefinition));
   values.finishAndSetAsInitializer(GV);
 
   if (CGM.getTriple().isOSBinFormatMachO())
     GV->setSection("__DATA, __objc_data");
-  GV->setAlignment(
-      CGM.getDataLayout().getABITypeAlignment(ObjCTypes.ClassnfABITy));
+  GV->setAlignment(llvm::Align(
+      CGM.getDataLayout().getABITypeAlignment(ObjCTypes.ClassnfABITy)));
   if (!CGM.getTriple().isOSBinFormatCOFF())
     if (HiddenVisibility)
       GV->setVisibility(llvm::GlobalValue::HiddenVisibility);
   return GV;
 }
 
 bool CGObjCNonFragileABIMac::ImplementationIsNonLazy(
     const ObjCImplDecl *OD) const {
llvm::Value *CGObjCNonFragileABIMac::GenerateProtocolRef(CodeGenFunction &CGF,
   if (PTGV)
     return CGF.Builder.CreateAlignedLoad(PTGV, Align);
   PTGV = new llvm::GlobalVariable(CGM.getModule(), Init->getType(), false,
                                   llvm::GlobalValue::WeakAnyLinkage, Init,
                                   ProtocolName);
   PTGV->setSection(GetSectionName("__objc_protorefs",
                                   "coalesced,no_dead_strip"));
   PTGV->setVisibility(llvm::GlobalValue::HiddenVisibility);
-  PTGV->setAlignment(Align.getQuantity());
+  PTGV->setAlignment(Align.getAsAlign());
   if (!CGM.getTriple().isOSBinFormatMachO())
     PTGV->setComdat(CGM.getModule().getOrInsertComdat(ProtocolName));
   CGM.addUsedGlobal(PTGV);
   return CGF.Builder.CreateAlignedLoad(PTGV, Align);
 }
 
 /// GenerateCategory - Build metadata for a category implementation.
 /// struct _category_t {

 
 llvm::Constant *
 CGObjCNonFragileABIMac::EmitIvarOffsetVar(const ObjCInterfaceDecl *ID,
                                           const ObjCIvarDecl *Ivar,
                                           unsigned long int Offset) {
   llvm::GlobalVariable *IvarOffsetGV = ObjCIvarOffsetVariable(ID, Ivar);
   IvarOffsetGV->setInitializer(
       llvm::ConstantInt::get(ObjCTypes.IvarOffsetVarTy, Offset));
-  IvarOffsetGV->setAlignment(
-      CGM.getDataLayout().getABITypeAlignment(ObjCTypes.IvarOffsetVarTy));
+  IvarOffsetGV->setAlignment(llvm::Align(
+      CGM.getDataLayout().getABITypeAlignment(ObjCTypes.IvarOffsetVarTy)));
 
   if (!CGM.getTriple().isOSBinFormatCOFF()) {
     // FIXME: This matches gcc, but shouldn't the visibility be set on the use
     // as well (i.e., in ObjCIvarOffsetVariable).
     if (Ivar->getAccessControl() == ObjCIvarDecl::Private ||
         Ivar->getAccessControl() == ObjCIvarDecl::Package ||
         ID->getVisibility() == HiddenVisibility)
       IvarOffsetGV->setVisibility(llvm::GlobalValue::HiddenVisibility);
llvm::raw_svector_ostream(ProtocolRef) << "_OBJC_LABEL_PROTOCOL_$_"
                                          << PD->getObjCRuntimeNameAsString();
 
   llvm::GlobalVariable *PTGV =
     new llvm::GlobalVariable(CGM.getModule(), ObjCTypes.ProtocolnfABIPtrTy,
                              false, llvm::GlobalValue::WeakAnyLinkage, Entry,
                              ProtocolRef);
   if (!CGM.getTriple().isOSBinFormatMachO())
     PTGV->setComdat(CGM.getModule().getOrInsertComdat(ProtocolRef));
-  PTGV->setAlignment(
-    CGM.getDataLayout().getABITypeAlignment(ObjCTypes.ProtocolnfABIPtrTy));
+  PTGV->setAlignment(llvm::Align(
+      CGM.getDataLayout().getABITypeAlignment(ObjCTypes.ProtocolnfABIPtrTy)));
   PTGV->setSection(GetSectionName("__objc_protolist",
                                   "coalesced,no_dead_strip"));
   PTGV->setVisibility(llvm::GlobalValue::HiddenVisibility);
   CGM.addUsedGlobal(PTGV);
   return Entry;
 }
 
 /// EmitProtocolList - Generate protocol list meta-data:
if (!Entry) {
     }
 
     std::string SectionName =
         GetSectionName("__objc_classrefs", "regular,no_dead_strip");
     Entry = new llvm::GlobalVariable(
         CGM.getModule(), ClassGV->getType(), false,
         getLinkageTypeForObjCMetadata(CGM, SectionName), ClassGV,
         "OBJC_CLASSLIST_REFERENCES_$_");
-    Entry->setAlignment(CGF.getPointerAlign().getQuantity());
+    Entry->setAlignment(CGF.getPointerAlign().getAsAlign());
     if (!ID || !ID->hasAttr<ObjCClassStubAttr>())
       Entry->setSection(SectionName);
 
     CGM.addCompilerUsedGlobal(Entry);
   }
 
   return EmitLoadOfClassRef(CGF, ID, Entry);
 }
CGObjCNonFragileABIMac::EmitSuperClassRef(CodeGenFunction &CGF,
   if (!Entry) {
     llvm::Constant *ClassGV = GetClassGlobalForClassRef(ID);
     std::string SectionName =
         GetSectionName("__objc_superrefs", "regular,no_dead_strip");
     Entry = new llvm::GlobalVariable(
         CGM.getModule(), ClassGV->getType(), false,
         getLinkageTypeForObjCMetadata(CGM, SectionName), ClassGV,
         "OBJC_CLASSLIST_SUP_REFS_$_");
-    Entry->setAlignment(CGF.getPointerAlign().getQuantity());
+    Entry->setAlignment(CGF.getPointerAlign().getAsAlign());
     Entry->setSection(SectionName);
     CGM.addCompilerUsedGlobal(Entry);
   }
 
   return EmitLoadOfClassRef(CGF, ID, Entry);
 }
 
 /// EmitMetaClassRef - Return a Value * of the address of _class_t
 /// meta-data
 ///
 llvm::Value *CGObjCNonFragileABIMac::EmitMetaClassRef(CodeGenFunction &CGF,
                                                       const ObjCInterfaceDecl *ID,
                                                       bool Weak) {
   CharUnits Align = CGF.getPointerAlign();
   llvm::GlobalVariable * &Entry = MetaClassReferences[ID->getIdentifier()];
   if (!Entry) {
     auto MetaClassGV = GetClassGlobal(ID, /*metaclass*/ true, NotForDefinition);
     std::string SectionName =
         GetSectionName("__objc_superrefs", "regular,no_dead_strip");
     Entry = new llvm::GlobalVariable(
         CGM.getModule(), ObjCTypes.ClassnfABIPtrTy, false,
         getLinkageTypeForObjCMetadata(CGM, SectionName), MetaClassGV,
         "OBJC_CLASSLIST_SUP_REFS_$_");
-    Entry->setAlignment(Align.getQuantity());
+    Entry->setAlignment(Align.getAsAlign());
     Entry->setSection(SectionName);
     CGM.addCompilerUsedGlobal(Entry);
   }
 
   return CGF.Builder.CreateAlignedLoad(Entry, Align);
 }
 
 /// GetClass - Return a reference to the class for the given interface
if (!Entry) {
     std::string SectionName =
         GetSectionName("__objc_selrefs", "literal_pointers,no_dead_strip");
     Entry = new llvm::GlobalVariable(
         CGM.getModule(), ObjCTypes.SelectorPtrTy, false,
         getLinkageTypeForObjCMetadata(CGM, SectionName), Casted,
         "OBJC_SELECTOR_REFERENCES_");
     Entry->setExternallyInitialized(true);
     Entry->setSection(SectionName);
-    Entry->setAlignment(Align.getQuantity());
+    Entry->setAlignment(Align.getAsAlign());
     CGM.addCompilerUsedGlobal(Entry);
   }
 
   return Address(Entry, Align);
 }
 
 /// EmitObjCIvarAssign - Code gen for assigning to a __strong object.
 /// objc_assign_ivar (id src, id *dst, ptrdiff_t)
CGObjCNonFragileABIMac::GetInterfaceEHType(const ObjCInterfaceDecl *ID,
   values.add(GetClassName(ClassName));
   values.add(GetClassGlobal(ID, /*metaclass*/ false, NotForDefinition));
 
   llvm::GlobalValue::LinkageTypes L = IsForDefinition
                                           ? llvm::GlobalValue::ExternalLinkage
                                           : llvm::GlobalValue::WeakAnyLinkage;
   if (Entry) {
     values.finishAndSetAsInitializer(Entry);
-    Entry->setAlignment(CGM.getPointerAlign().getQuantity());
+    Entry->setAlignment(CGM.getPointerAlign().getAsAlign());
   } else {
     Entry = values.finishAndCreateGlobal("OBJC_EHTYPE_$_" + ClassName,
                                          CGM.getPointerAlign(),
                                          /*constant*/ false,
                                          L);
     if (hasObjCExceptionAttribute(CGM.getContext(), ID))
       CGM.setGVProperties(Entry, ID);
   }

clang/lib/CodeGen/CGOpenMPRuntimeNVPTX.cpp

case OMPAllocateDeclAttr::OMPConstMemAlloc: {
       llvm::Type *VarTy = CGF.ConvertTypeForMem(VD->getType());
       auto *GV = new llvm::GlobalVariable(
           CGM.getModule(), VarTy, /*isConstant=*/false,
           llvm::GlobalValue::InternalLinkage,
           llvm::Constant::getNullValue(VarTy), VD->getName(),
           /*InsertBefore=*/nullptr, llvm::GlobalValue::NotThreadLocal,
           CGM.getContext().getTargetAddressSpace(LangAS::cuda_constant));
       CharUnits Align = CGM.getContext().getDeclAlign(VD);
-      GV->setAlignment(Align.getQuantity());
+      GV->setAlignment(Align.getAsAlign());
       return Address(GV, Align);
     }
     case OMPAllocateDeclAttr::OMPPTeamMemAlloc: {
       llvm::Type *VarTy = CGF.ConvertTypeForMem(VD->getType());
       auto *GV = new llvm::GlobalVariable(
           CGM.getModule(), VarTy, /*isConstant=*/false,
           llvm::GlobalValue::InternalLinkage,
           llvm::Constant::getNullValue(VarTy), VD->getName(),
           /*InsertBefore=*/nullptr, llvm::GlobalValue::NotThreadLocal,
           CGM.getContext().getTargetAddressSpace(LangAS::cuda_shared));
       CharUnits Align = CGM.getContext().getDeclAlign(VD);
-      GV->setAlignment(Align.getQuantity());
+      GV->setAlignment(Align.getAsAlign());
       return Address(GV, Align);
     }
     case OMPAllocateDeclAttr::OMPLargeCapMemAlloc:
     case OMPAllocateDeclAttr::OMPCGroupMemAlloc: {
       llvm::Type *VarTy = CGF.ConvertTypeForMem(VD->getType());
       auto *GV = new llvm::GlobalVariable(
           CGM.getModule(), VarTy, /*isConstant=*/false,
           llvm::GlobalValue::InternalLinkage,
           llvm::Constant::getNullValue(VarTy), VD->getName());
       CharUnits Align = CGM.getContext().getDeclAlign(VD);
-      GV->setAlignment(Align.getQuantity());
+      GV->setAlignment(Align.getAsAlign());
       return Address(GV, Align);
     }
     }
   }
 
   if (getDataSharingMode(CGM) != CGOpenMPRuntimeNVPTX::Generic)
     return Address::invalid();
 

clang/lib/CodeGen/CodeGenFunction.h

public:
   /// isInConditionalBranch - Return true if we're currently emitting
   /// one branch or the other of a conditional expression.
   bool isInConditionalBranch() const { return OutermostConditional != nullptr; }
 
   void setBeforeOutermostConditional(llvm::Value *value, Address addr) {
     assert(isInConditionalBranch());
     llvm::BasicBlock *block = OutermostConditional->getStartingBlock();
     auto store = new llvm::StoreInst(value, addr.getPointer(), &block->back());
-    store->setAlignment(addr.getAlignment().getQuantity());
+    store->setAlignment(addr.getAlignment().getAsAlign());
   }
 
   /// An RAII object to record that we're evaluating a statement
   /// expression.
   class StmtExprEvaluation {
     CodeGenFunction &CGF;
 
     /// We have to save the outermost conditional: cleanups in a

clang/lib/CodeGen/CodeGenFunction.cpp

if (!CGM.getTypes().isZeroInitializable(Ty)) {
     llvm::Constant *NullConstant = CGM.EmitNullConstant(Ty);
 
     llvm::GlobalVariable *NullVariable =
       new llvm::GlobalVariable(CGM.getModule(), NullConstant->getType(),
                                /*isConstant=*/true,
                                llvm::GlobalVariable::PrivateLinkage,
                                NullConstant, Twine());
     CharUnits NullAlign = DestPtr.getAlignment();
-    NullVariable->setAlignment(NullAlign.getQuantity());
+    NullVariable->setAlignment(NullAlign.getAsAlign());
     Address SrcPtr(Builder.CreateBitCast(NullVariable, Builder.getInt8PtrTy()),
                    NullAlign);
 
     if (vla) return emitNonZeroVLAInit(*this, Ty, DestPtr, SrcPtr, SizeVal);
 
     // Get and call the appropriate llvm.memcpy overload.
     Builder.CreateMemCpy(DestPtr, SrcPtr, SizeVal, false);
     return;

clang/lib/CodeGen/CodeGenModule.cpp

void CodeGenModule::EmitCtorList(CtorList &Fns, const char *GlobalName) {
 
   auto list =
     ctors.finishAndCreateGlobal(GlobalName, getPointerAlign(),
                                 /*constant*/ false,
                                 llvm::GlobalValue::AppendingLinkage);
 
   // The LTO linker doesn't seem to like it when we set an alignment
   // on appending variables.  Take it off as a workaround.
-  list->setAlignment(0);
+  list->setAlignment(llvm::None);
 
   Fns.clear();
 }
 
 llvm::GlobalValue::LinkageTypes
 CodeGenModule::getFunctionLinkage(GlobalDecl GD) {
   const auto *D = cast<FunctionDecl>(GD.getDecl());
 
if (!D->hasAttr<OptimizeNoneAttr>()) {
     if (D->hasAttr<MinSizeAttr>())
       B.addAttribute(llvm::Attribute::MinSize);
   }
 
   F->addAttributes(llvm::AttributeList::FunctionIndex, B);
 
   unsigned alignment = D->getMaxAlignment() / Context.getCharWidth();
   if (alignment)
-    F->setAlignment(alignment);
+    F->setAlignment(llvm::Align(alignment));
 
   if (!D->hasAttr<AlignedAttr>())
     if (LangOpts.FunctionAlignment)
-      F->setAlignment(1 << LangOpts.FunctionAlignment);
+      F->setAlignment(llvm::Align(1 << LangOpts.FunctionAlignment));
 
   // Some C++ ABIs require 2-byte alignment for member functions, in order to
   // reserve a bit for differentiating between virtual and non-virtual member
   // functions. If the current target's C++ ABI requires this and this is a
   // member function, set its alignment accordingly.
   if (getTarget().getCXXABI().areMemberFunctionsAligned()) {
     if (F->getAlignment() < 2 && isa<CXXMethodDecl>(D))
-      F->setAlignment(2);
+      F->setAlignment(llvm::Align(2));
   }
 
   // In the cross-dso CFI mode with canonical jump tables, we want !type
   // attributes on definitions only.
   if (CodeGenOpts.SanitizeCfiCrossDso &&
       CodeGenOpts.SanitizeCfiCanonicalJumpTables) {
     if (auto *FD = dyn_cast<FunctionDecl>(D)) {
       // Skip available_externally functions. They won't be codegen'ed in the
CodeGenModule::GetOrCreateLLVMGlobal(StringRef MangledName,
   if (D) {
     if (LangOpts.OpenMP && !LangOpts.OpenMPSimd)
       getOpenMPRuntime().registerTargetGlobalVariable(D, GV);
 
     // FIXME: This code is overly simple and should be merged with other global
     // handling.
     GV->setConstant(isTypeConstant(D->getType(), false));
 
-    GV->setAlignment(getContext().getDeclAlign(D).getQuantity());
+    GV->setAlignment(getContext().getDeclAlign(D).getAsAlign());
 
     setLinkageForGV(GV, D);
 
     if (D->getTLSKind()) {
       if (D->getTLSKind() == VarDecl::TLS_Dynamic)
         CXXThreadLocals.push_back(D);
       setTLSMode(GV, *D);
     }
if (OldGV) {
 
     OldGV->eraseFromParent();
   }
 
   if (supportsCOMDAT() && GV->isWeakForLinker() &&
       !GV->hasAvailableExternallyLinkage())
     GV->setComdat(TheModule.getOrInsertComdat(GV->getName()));
 
-  GV->setAlignment(Alignment);
+  GV->setAlignment(llvm::MaybeAlign(Alignment));
 
   return GV;
 }
 
 /// GetAddrOfGlobalVar - Return the llvm::Constant for the address of the
 /// given global variable.  If Ty is non-null and if the global doesn't exist,
 /// then it will be created with the specified type instead of whatever the
 /// normal requested type would be. If IsForDefinition is true, it is guaranteed
void CodeGenModule::EmitGlobalVarDefinition(const VarDecl *D,
 
   // If it is in a read-only section, mark it 'constant'.
   if (const SectionAttr *SA = D->getAttr<SectionAttr>()) {
     const ASTContext::SectionInfo &SI = Context.SectionInfos[SA->getName()];
     if ((SI.SectionFlags & ASTContext::PSF_Write) == 0)
       GV->setConstant(true);
   }
 
-  GV->setAlignment(getContext().getDeclAlign(D).getQuantity());
-
+  GV->setAlignment(getContext().getDeclAlign(D).getAsAlign());
 
   // On Darwin, if the normal linkage of a C++ thread_local variable is
   // LinkOnce or Weak, we keep the normal linkage to prevent multiple
   // copies within a linkage unit; otherwise, the backing variable has
   // internal linkage and all accesses should just be calls to the
   // Itanium-specified entry point, which has the normal linkage of the
   // variable. This is to preserve the ability to change the implementation
   // behind the scenes.
CodeGenModule::GetAddrOfConstantCFString(const StringLiteral *Literal) {
   auto *GV =
       new llvm::GlobalVariable(getModule(), C->getType(), /*isConstant=*/true,
                                llvm::GlobalValue::PrivateLinkage, C, ".str");
   GV->setUnnamedAddr(llvm::GlobalValue::UnnamedAddr::Global);
   // Don't enforce the target's minimum global alignment, since the only use
   // of the string is via this class initializer.
   CharUnits Align = isUTF16 ? Context.getTypeAlignInChars(Context.ShortTy)
                             : Context.getTypeAlignInChars(Context.CharTy);
-  GV->setAlignment(Align.getQuantity());
+  GV->setAlignment(Align.getAsAlign());
 
   // FIXME: We set the section explicitly to avoid a bug in ld64 224.1.
   // Without it LLVM can merge the string with a non unnamed_addr one during
   // LTO.  Doing that changes the section it ends in, which surprises ld64.
   if (Triple.isOSBinFormatMachO())
     GV->setSection(isUTF16 ? "__TEXT,__ustring"
                            : "__TEXT,__cstring,cstring_literals");
   // Make sure the literal ends up in .rodata to allow for safe ICF and for
GenerateStringLiteral(llvm::Constant *C, llvm::GlobalValue::LinkageTypes LT,
   unsigned AddrSpace = CGM.getContext().getTargetAddressSpace(
       CGM.getStringLiteralAddressSpace());
 
   llvm::Module &M = CGM.getModule();
   // Create a global variable for this string
   auto *GV = new llvm::GlobalVariable(
       M, C->getType(), !CGM.getLangOpts().WritableStrings, LT, C, GlobalName,
       nullptr, llvm::GlobalVariable::NotThreadLocal, AddrSpace);
-  GV->setAlignment(Alignment.getQuantity());
+  GV->setAlignment(Alignment.getAsAlign());
   GV->setUnnamedAddr(llvm::GlobalValue::UnnamedAddr::Global);
   if (GV->isWeakForLinker()) {
     assert(CGM.supportsCOMDAT() && "Only COFF uses weak string literals");
     GV->setComdat(M.getOrInsertComdat(GV->getName()));
   }
   CGM.setDSOLocal(GV);
 
   return GV;
 }
 
 /// GetAddrOfConstantStringFromLiteral - Return a pointer to a
 /// constant array for the given string literal.
 ConstantAddress
 CodeGenModule::GetAddrOfConstantStringFromLiteral(const StringLiteral *S,
                                                   StringRef Name) {
   CharUnits Alignment = getContext().getAlignOfGlobalVarInChars(S->getType());
 
   llvm::Constant *C = GetConstantArrayFromStringLiteral(S);
   llvm::GlobalVariable **Entry = nullptr;
   if (!LangOpts.WritableStrings) {
     Entry = &ConstantStringMap[C];
     if (auto GV = *Entry) {
       if (Alignment.getQuantity() > GV->getAlignment())
-        GV->setAlignment(Alignment.getQuantity());
+        GV->setAlignment(Alignment.getAsAlign());
       return ConstantAddress(castStringLiteralToDefaultAddressSpace(*this, GV),
                              Alignment);
     }
   }
 
   SmallString<256> MangledNameBuffer;
   StringRef GlobalVariableName;
   llvm::GlobalValue::LinkageTypes LT;
llvm::Constant *C =
       llvm::ConstantDataArray::getString(getLLVMContext(), StrWithNull, false);
 
   // Don't share any string literals if strings aren't constant.
   llvm::GlobalVariable **Entry = nullptr;
   if (!LangOpts.WritableStrings) {
     Entry = &ConstantStringMap[C];
     if (auto GV = *Entry) {
       if (Alignment.getQuantity() > GV->getAlignment())
-        GV->setAlignment(Alignment.getQuantity());
+        GV->setAlignment(Alignment.getAsAlign());
       return ConstantAddress(castStringLiteralToDefaultAddressSpace(*this, GV),
                              Alignment);
     }
   }
 
   // Get the default prefix if a name wasn't specified.
   if (!GlobalName)
     GlobalName = ".str";
if (Linkage == llvm::GlobalVariable::ExternalLinkage) {
     }
   }
   auto TargetAS = getContext().getTargetAddressSpace(AddrSpace);
   auto *GV = new llvm::GlobalVariable(
       getModule(), Type, Constant, Linkage, InitialValue, Name.c_str(),
       /*InsertBefore=*/nullptr, llvm::GlobalVariable::NotThreadLocal, TargetAS);
   if (emitter) emitter->finalize(GV);
   setGVProperties(GV, VD);
-  GV->setAlignment(Align.getQuantity());
+  GV->setAlignment(Align.getAsAlign());
   if (supportsCOMDAT() && GV->isWeakForLinker())
     GV->setComdat(TheModule.getOrInsertComdat(GV->getName()));
   if (VD->getTLSKind())
     setTLSMode(GV, *VD);
   llvm::Constant *CV = GV;
   if (AddrSpace != LangAS::Default)
     CV = getTargetCodeGenInfo().performAddrSpaceCast(
         *this, GV, AddrSpace, LangAS::Default,

clang/lib/CodeGen/ConstantInitBuilder.cpp

auto GV = new llvm::GlobalVariable(CGM.getModule(),
                                      initializer->getType(),
                                      constant,
                                      linkage,
                                      initializer,
                                      name,
                                      /*insert before*/ nullptr,
                                      llvm::GlobalValue::NotThreadLocal,
                                      addressSpace);
-  GV->setAlignment(alignment.getQuantity());
+  GV->setAlignment(alignment.getAsAlign());
   resolveSelfReferences(GV);
   return GV;
 }
 
 void ConstantInitBuilderBase::setGlobalInitializer(llvm::GlobalVariable *GV,
                                                    llvm::Constant *initializer){
   GV->setInitializer(initializer);
 

clang/lib/CodeGen/CoverageMappingGen.cpp

llvm::Constant *TUDataVals[] = {CovDataHeaderVal, RecordsVal,
                                   FilenamesAndMappingsVal};
   auto CovDataVal =
       llvm::ConstantStruct::get(CovDataTy, makeArrayRef(TUDataVals));
   auto CovData = new llvm::GlobalVariable(
       CGM.getModule(), CovDataTy, true, llvm::GlobalValue::InternalLinkage,
       CovDataVal, llvm::getCoverageMappingVarName());
 
   CovData->setSection(getCoverageSection(CGM));
-  CovData->setAlignment(8);
+  CovData->setAlignment(llvm::Align(8));
 
   // Make sure the data doesn't get deleted.
   CGM.addUsedGlobal(CovData);
   // Create the deferred function records array
   if (!FunctionNames.empty()) {
     auto NamesArrTy = llvm::ArrayType::get(llvm::Type::getInt8PtrTy(Ctx),
                                            FunctionNames.size());
     auto NamesArrVal = llvm::ConstantArray::get(NamesArrTy, FunctionNames);

clang/lib/CodeGen/ItaniumCXXABI.cpp

if (!guard) {
     guard = new llvm::GlobalVariable(CGM.getModule(), guardTy,
                                      false, var->getLinkage(),
                                      llvm::ConstantInt::get(guardTy, 0),
                                      guardName.str());
     guard->setDSOLocal(var->isDSOLocal());
     guard->setVisibility(var->getVisibility());
     // If the variable is thread-local, so is its guard variable.
     guard->setThreadLocalMode(var->getThreadLocalMode());
-    guard->setAlignment(guardAlignment.getQuantity());
+    guard->setAlignment(guardAlignment.getAsAlign());
 
     // The ABI says: "It is suggested that it be emitted in the same COMDAT
     // group as the associated data object." In practice, this doesn't work for
     // non-ELF and non-Wasm object formats, so only do it for ELF and Wasm.
     llvm::Comdat *C = var->getComdat();
     if (!D.isLocalVarDecl() && C &&
         (CGM.getTarget().getTriple().isOSBinFormatELF() ||
          CGM.getTarget().getTriple().isOSBinFormatWasm())) {
InitFunc = CGM.CreateGlobalInitOrDestructFunction(FTy, "__tls_init", FI,
                                                       /*TLS=*/true);
     llvm::GlobalVariable *Guard = new llvm::GlobalVariable(
         CGM.getModule(), CGM.Int8Ty, /*isConstant=*/false,
         llvm::GlobalVariable::InternalLinkage,
         llvm::ConstantInt::get(CGM.Int8Ty, 0), "__tls_guard");
     Guard->setThreadLocal(true);
 
     CharUnits GuardAlign = CharUnits::One();
-    Guard->setAlignment(GuardAlign.getQuantity());
+    Guard->setAlignment(GuardAlign.getAsAlign());
 
     CodeGenFunction(CGM).GenerateCXXGlobalInitFunc(
         InitFunc, OrderedInits, ConstantAddress(Guard, GuardAlign));
     // On Darwin platforms, use CXX_FAST_TLS calling convention.
     if (CGM.getTarget().getTriple().isOSDarwin()) {
       InitFunc->setCallingConv(llvm::CallingConv::CXX_FAST_TLS);
       InitFunc->addFnAttr(llvm::Attribute::NoUnwind);
     }
if (OldGV) {
     OldGV->eraseFromParent();
   }
 
   if (CGM.supportsCOMDAT() && GV->isWeakForLinker())
     GV->setComdat(M.getOrInsertComdat(GV->getName()));
 
   CharUnits Align =
       CGM.getContext().toCharUnitsFromBits(CGM.getTarget().getPointerAlign(0));
-  GV->setAlignment(Align.getQuantity());
+  GV->setAlignment(Align.getAsAlign());
 
   // The Itanium ABI specifies that type_info objects must be globally
   // unique, with one exception: if the type is an incomplete class
   // type or a (possibly indirect) pointer to one.  That exception
   // affects the general case of comparing type_info objects produced
   // by the typeid operator, which is why the comparison operators on
   // std::type_info generally use the type_info name pointers instead
   // of the object addresses.  However, the language's built-in uses

clang/lib/CodeGen/MicrosoftCXXABI.cpp

static ConstantAddress getInitThreadEpochPtr(CodeGenModule &CGM) {
   CharUnits Align = CGM.getIntAlign();
   if (auto *GV = CGM.getModule().getNamedGlobal(VarName))
     return ConstantAddress(GV, Align);
   auto *GV = new llvm::GlobalVariable(
       CGM.getModule(), CGM.IntTy,
       /*isConstant=*/false, llvm::GlobalVariable::ExternalLinkage,
       /*Initializer=*/nullptr, VarName,
       /*InsertBefore=*/nullptr, llvm::GlobalVariable::GeneralDynamicTLSModel);
-  GV->setAlignment(Align.getQuantity());
+  GV->setAlignment(Align.getAsAlign());
   return ConstantAddress(GV, Align);
 }
 
 static llvm::FunctionCallee getInitThreadHeaderFn(CodeGenModule &CGM) {
   llvm::FunctionType *FTy =
       llvm::FunctionType::get(llvm::Type::getVoidTy(CGM.getLLVMContext()),
                               CGM.IntTy->getPointerTo(), /*isVarArg=*/false);
   return CGM.CreateRuntimeFunction(
if (!GuardVar) {
 
     // Create the guard variable with a zero-initializer. Just absorb linkage,
     // visibility and dll storage class from the guarded variable.
     GuardVar =
         new llvm::GlobalVariable(CGM.getModule(), GuardTy, /*isConstant=*/false,
                                  GV->getLinkage(), Zero, GuardName.str());
     GuardVar->setVisibility(GV->getVisibility());
     GuardVar->setDLLStorageClass(GV->getDLLStorageClass());
-    GuardVar->setAlignment(GuardAlign.getQuantity());
+    GuardVar->setAlignment(GuardAlign.getAsAlign());
     if (GuardVar->isWeakForLinker())
       GuardVar->setComdat(
           CGM.getModule().getOrInsertComdat(GuardVar->getName()));
     if (D.getTLSKind())
       GuardVar->setThreadLocal(true);
     if (GI && !HasPerVariableGuard)
       GI->Guard = GuardVar;
   }

clang/lib/CodeGen/ObjectFilePCHContainerOperations.cpp

void HandleTranslationUnit(ASTContext &Ctx) override {
     auto *Ty = llvm::ArrayType::get(Int8Ty, Size);
     auto *Data = llvm::ConstantDataArray::getString(
         *VMContext, StringRef(SerializedAST.data(), Size),
         /*AddNull=*/false);
     auto *ASTSym = new llvm::GlobalVariable(
         *M, Ty, /*constant*/ true, llvm::GlobalVariable::InternalLinkage, Data,
         "__clang_ast");
     // The on-disk hashtable needs to be aligned.
-    ASTSym->setAlignment(8);
+    ASTSym->setAlignment(llvm::Align(8));
 
     // Mach-O also needs a segment name.
     if (Triple.isOSBinFormatMachO())
       ASTSym->setSection("__CLANG,__clangast");
     // COFF has an eight character length limit.
     else if (Triple.isOSBinFormatCOFF())
       ASTSym->setSection("clangast");
     else