[NFC] Replace some deprecated getAlignment() calls with getAlign()

[aeubanks]

update

[arsenm]

llvm/lib/Analysis/MemoryBuiltins.cpp

595

Don't see why this wouldn't just be Alignment (really I don't know why we have MaybeAlign at all)

llvm/lib/IR/AsmWriter.cpp

4243

probably should add a direct raw_ostream overload?

[aeubanks]

llvm/lib/Analysis/MemoryBuiltins.cpp

595

background: http://lists.llvm.org/pipermail/llvm-dev/2019-July/133851.html
an alignment of 0 (unknown) is different from 1 (no alignment), but actually https://reviews.llvm.org/D64790 seems to specify that perhaps we can treat 0 as 1

but anyway, for now there's a check that Alignment is not 0, so I'll keep that for now

llvm/lib/IR/AsmWriter.cpp

4243

I wouldn't expect a raw_ostream overload for MaybeAlign to print a comma, just align #, but if we want to conditionally emit the comma then we already have to check if MaybeAlign is not null, so I don't see much point in it. and it matches nearby code anyway

[gchatelet]

Thx a lot for the cleanup. I really appreciate it @aeubanks .

@arsenm I wish we could remove MaybeAlign completely. It is certainly possible to confine its usage to a smaller part of the codebase but I don't think we can remove it completely.

llvm/include/llvm/Analysis/MemoryBuiltins.h

class ObjectSizeOffsetVisitor
   : public InstVisitor<ObjectSizeOffsetVisitor, SizeOffsetType> {
   const DataLayout &DL;
   const TargetLibraryInfo *TLI;
   ObjectSizeOpts Options;
   unsigned IntTyBits;
   APInt Zero;
   SmallPtrSet<Instruction *, 8> SeenInsts;
 
-  APInt align(APInt Size, uint64_t Align);
+  APInt align(APInt Size, MaybeAlign Align);
 
   SizeOffsetType unknown() {
     return std::make_pair(APInt(), APInt());
   }
 
 public:
   ObjectSizeOffsetVisitor(const DataLayout &DL, const TargetLibraryInfo *TLI,
                           LLVMContext &Context, ObjectSizeOpts Options = {});

llvm/lib/Analysis/MemoryBuiltins.cpp

Value *llvm::lowerObjectSizeCall(IntrinsicInst *ObjectSize,
   return ConstantInt::get(ResultType, MaxVal ? -1ULL : 0);
 }
 
 STATISTIC(ObjectVisitorArgument,
           "Number of arguments with unsolved size and offset");
 STATISTIC(ObjectVisitorLoad,
           "Number of load instructions with unsolved size and offset");
 
-APInt ObjectSizeOffsetVisitor::align(APInt Size, uint64_t Alignment) {
+APInt ObjectSizeOffsetVisitor::align(APInt Size, MaybeAlign Alignment) {
   if (Options.RoundToAlign && Alignment)
-    return APInt(IntTyBits, alignTo(Size.getZExtValue(), Align(Alignment)));
+    return APInt(IntTyBits, alignTo(Size.getZExtValue(), Alignment));
   return Size;
 }
 
 ObjectSizeOffsetVisitor::ObjectSizeOffsetVisitor(const DataLayout &DL,
                                                  const TargetLibraryInfo *TLI,
                                                  LLVMContext &Context,
                                                  ObjectSizeOpts Options)
     : DL(DL), TLI(TLI), Options(Options) {
SizeOffsetType ObjectSizeOffsetVisitor::visitAllocaInst(AllocaInst &I) {
   if (!I.getAllocatedType()->isSized())
     return unknown();
 
   if (isa<ScalableVectorType>(I.getAllocatedType()))
     return unknown();
 
   APInt Size(IntTyBits, DL.getTypeAllocSize(I.getAllocatedType()));
   if (!I.isArrayAllocation())
-    return std::make_pair(align(Size, I.getAlignment()), Zero);
+    return std::make_pair(align(Size, I.getAlign()), Zero);
 
   Value *ArraySize = I.getArraySize();
   if (const ConstantInt *C = dyn_cast<ConstantInt>(ArraySize)) {
     APInt NumElems = C->getValue();
     if (!CheckedZextOrTrunc(NumElems))
       return unknown();
 
     bool Overflow;
     Size = Size.umul_ov(NumElems, Overflow);
-    return Overflow ? unknown() : std::make_pair(align(Size, I.getAlignment()),
-                                                 Zero);
+    return Overflow ? unknown()
+                    : std::make_pair(align(Size, I.getAlign()), Zero);
   }
   return unknown();
 }
 
 SizeOffsetType ObjectSizeOffsetVisitor::visitArgument(Argument &A) {
   Type *MemoryTy = A.getPointeeInMemoryValueType();
   // No interprocedural analysis is done at the moment.
   if (!MemoryTy|| !MemoryTy->isSized()) {
     ++ObjectVisitorArgument;
     return unknown();
   }
 
   APInt Size(IntTyBits, DL.getTypeAllocSize(MemoryTy));
-  return std::make_pair(align(Size, A.getParamAlignment()), Zero);
+  return std::make_pair(align(Size, A.getParamAlign()), Zero);
 }
 
 SizeOffsetType ObjectSizeOffsetVisitor::visitCallBase(CallBase &CB) {
   Optional<AllocFnsTy> FnData = getAllocationSize(&CB, TLI);
   if (!FnData)
     return unknown();
 
   // Handle strdup-like functions separately.
SizeOffsetType ObjectSizeOffsetVisitor::visitGlobalAlias(GlobalAlias &GA) {
   return compute(GA.getAliasee());
 }
 
 SizeOffsetType ObjectSizeOffsetVisitor::visitGlobalVariable(GlobalVariable &GV){
   if (!GV.hasDefinitiveInitializer())
     return unknown();
 
   APInt Size(IntTyBits, DL.getTypeAllocSize(GV.getValueType()));
-  return std::make_pair(align(Size, GV.getAlignment()), Zero);
+  return std::make_pair(align(Size, GV.getAlign()), Zero);
 }
 
 SizeOffsetType ObjectSizeOffsetVisitor::visitIntToPtrInst(IntToPtrInst&) {
   // clueless
   return unknown();
 }
 
 SizeOffsetType ObjectSizeOffsetVisitor::visitLoadInst(LoadInst&) {

llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp

Align AsmPrinter::getGVAlignment(const GlobalObject *GV, const DataLayout &DL,
   if (const GlobalVariable *GVar = dyn_cast<GlobalVariable>(GV))
     Alignment = DL.getPreferredAlign(GVar);
 
   // If InAlign is specified, round it to it.
   if (InAlign > Alignment)
     Alignment = InAlign;
 
   // If the GV has a specified alignment, take it into account.
-  const MaybeAlign GVAlign(GV->getAlignment());
+  const MaybeAlign GVAlign(GV->getAlign());
   if (!GVAlign)
     return Alignment;
 
   assert(GVAlign && "GVAlign must be set");
 
   // If the GVAlign is larger than NumBits, or if we are required to obey
   // NumBits because the GV has an assigned section, obey it.
   if (*GVAlign > Alignment || GV->hasSection())

llvm/lib/IR/AsmWriter.cpp

void AssemblyWriter::printGlobal(const GlobalVariable *GV) {
   }
   if (GV->hasPartition()) {
     Out << ", partition \"";
     printEscapedString(GV->getPartition(), Out);
     Out << '"';
   }
 
   maybePrintComdat(Out, *GV);
-  if (GV->getAlignment())
-    Out << ", align " << GV->getAlignment();
+  if (MaybeAlign A = GV->getAlign())
+    Out << ", align " << A->value();
 
   SmallVector<std::pair<unsigned, MDNode *>, 4> MDs;
   GV->getAllMetadata(MDs);
   printMetadataAttachments(MDs, ", ");
 
   auto Attrs = GV->getAttributes();
   if (Attrs.hasAttributes())
     Out << " #" << Machine.getAttributeGroupSlot(Attrs);
if (F->hasSection()) {
     Out << '"';
   }
   if (F->hasPartition()) {
     Out << " partition \"";
     printEscapedString(F->getPartition(), Out);
     Out << '"';
   }
   maybePrintComdat(Out, *F);
-  if (F->getAlignment())
-    Out << " align " << F->getAlignment();
+  if (MaybeAlign A = F->getAlign())
+    Out << " align " << A->value();
   if (F->hasGC())
     Out << " gc \"" << F->getGC() << '"';
   if (F->hasPrefixData()) {
     Out << " prefix ";
     writeOperand(F->getPrefixData(), true);
   }
   if (F->hasPrologueData()) {
     Out << " prologue ";
if (isa<BranchInst>(I) && cast<BranchInst>(I).isConditional()) {
     // allocation, or if the type is not canonical for scalar allocations.  The
     // latter case prevents the type from mutating when round-tripping through
     // assembly.
     if (!AI->getArraySize() || AI->isArrayAllocation() ||
         !AI->getArraySize()->getType()->isIntegerTy(32)) {
       Out << ", ";
       writeOperand(AI->getArraySize(), true);
     }
-    if (AI->getAlignment()) {
-      Out << ", align " << AI->getAlignment();
+    if (MaybeAlign A = AI->getAlign()) {
+      Out << ", align " << A->value();
     }
 
     unsigned AddrSpace = AI->getType()->getAddressSpace();
     if (AddrSpace != 0) {
       Out << ", addrspace(" << AddrSpace << ')';
     }
   } else if (isa<CastInst>(I)) {
     if (Operand) {
for (unsigned i = 0, E = I.getNumOperands(); i != E; ++i) {
       writeOperand(I.getOperand(i), PrintAllTypes);
     }
   }
 
   // Print atomic ordering/alignment for memory operations
   if (const LoadInst *LI = dyn_cast<LoadInst>(&I)) {
     if (LI->isAtomic())
       writeAtomic(LI->getContext(), LI->getOrdering(), LI->getSyncScopeID());
-    if (LI->getAlignment())
-      Out << ", align " << LI->getAlignment();
+    if (MaybeAlign A = LI->getAlign())
+      Out << ", align " << A->value();
   } else if (const StoreInst *SI = dyn_cast<StoreInst>(&I)) {
     if (SI->isAtomic())
       writeAtomic(SI->getContext(), SI->getOrdering(), SI->getSyncScopeID());
-    if (SI->getAlignment())
-      Out << ", align " << SI->getAlignment();
+    if (MaybeAlign A = SI->getAlign())
+      Out << ", align " << A->value();
   } else if (const AtomicCmpXchgInst *CXI = dyn_cast<AtomicCmpXchgInst>(&I)) {
     writeAtomicCmpXchg(CXI->getContext(), CXI->getSuccessOrdering(),
                        CXI->getFailureOrdering(), CXI->getSyncScopeID());
     Out << ", align " << CXI->getAlign().value();
   } else if (const AtomicRMWInst *RMWI = dyn_cast<AtomicRMWInst>(&I)) {
     writeAtomic(RMWI->getContext(), RMWI->getOrdering(),
                 RMWI->getSyncScopeID());
     Out << ", align " << RMWI->getAlign().value();

llvm/lib/IR/Globals.cpp

void GlobalObject::setAlignment(MaybeAlign Align) {
   unsigned OldData = getGlobalValueSubClassData();
   setGlobalValueSubClassData((OldData & ~AlignmentMask) | AlignmentData);
   assert(MaybeAlign(getAlignment()) == Align &&
          "Alignment representation error!");
 }
 
 void GlobalObject::copyAttributesFrom(const GlobalObject *Src) {
   GlobalValue::copyAttributesFrom(Src);
-  setAlignment(MaybeAlign(Src->getAlignment()));
+  setAlignment(Src->getAlign());
   setSection(Src->getSection());
 }
 
 std::string GlobalValue::getGlobalIdentifier(StringRef Name,
                                              GlobalValue::LinkageTypes Linkage,
                                              StringRef FileName) {
 
   // Value names may be prefixed with a binary '1' to indicate
bool GlobalObject::canIncreaseAlignment() const {
   // is a strong definition.
   if (!isStrongDefinitionForLinker())
     return false;
 
   // It also has to either not have a section defined, or, not have
   // alignment specified. (If it is assigned a section, the global
   // could be densely packed with other objects in the section, and
   // increasing the alignment could cause padding issues.)
-  if (hasSection() && getAlignment() > 0)
+  if (hasSection() && getAlign().hasValue())
     return false;
 
   // On ELF platforms, we're further restricted in that we can't
   // increase the alignment of any variable which might be emitted
   // into a shared library, and which is exported. If the main
   // executable accesses a variable found in a shared-lib, the main
   // exe actually allocates memory for and exports the symbol ITSELF,
   // overriding the symbol found in the library. That is, at link

llvm/lib/IR/Value.cpp

if (isa<Function>(GO)) {
       switch (DL.getFunctionPtrAlignType()) {
       case DataLayout::FunctionPtrAlignType::Independent:
         return FunctionPtrAlign;
       case DataLayout::FunctionPtrAlignType::MultipleOfFunctionAlign:
         return std::max(FunctionPtrAlign, GO->getAlign().valueOrOne());
       }
       llvm_unreachable("Unhandled FunctionPtrAlignType");
     }
-    const MaybeAlign Alignment(GO->getAlignment());
+    const MaybeAlign Alignment(GO->getAlign());
     if (!Alignment) {
       if (auto *GVar = dyn_cast<GlobalVariable>(GO)) {
         Type *ObjectType = GVar->getValueType();
         if (ObjectType->isSized()) {
           // If the object is defined in the current Module, we'll be giving
           // it the preferred alignment. Otherwise, we have to assume that it
           // may only have the minimum ABI alignment.
           if (GVar->isStrongDefinitionForLinker())

llvm/lib/IR/Verifier.cpp

for (const Value *TheNextUser : User->materialized_users())
     if (Callback(TheNextUser))
       forEachUser(TheNextUser, Visited, Callback);
 }
 
 void Verifier::visitGlobalValue(const GlobalValue &GV) {
   Assert(!GV.isDeclaration() || GV.hasValidDeclarationLinkage(),
          "Global is external, but doesn't have external or weak linkage!", &GV);
 
-  if (const GlobalObject *GO = dyn_cast<GlobalObject>(&GV))
-    Assert(GO->getAlignment() <= Value::MaximumAlignment,
+  if (const GlobalObject *GO = dyn_cast<GlobalObject>(&GV)) {
+
+    if (MaybeAlign A = GO->getAlign()) {
+      Assert(A->value() <= Value::MaximumAlignment,
              "huge alignment values are unsupported", GO);
+    }
+  }
   Assert(!GV.hasAppendingLinkage() || isa<GlobalVariable>(GV),
          "Only global variables can have appending linkage!", &GV);
 
   if (GV.hasAppendingLinkage()) {
     const GlobalVariable *GVar = dyn_cast<GlobalVariable>(&GV);
     Assert(GVar && GVar->getValueType()->isArrayTy(),
            "Only global arrays can have appending linkage!", GVar);
   }
void Verifier::checkAtomicMemAccessSize(Type *Ty, const Instruction *I) {
   Assert(!(Size & (Size - 1)),
          "atomic memory access' operand must have a power-of-two size", Ty, I);
 }
 
 void Verifier::visitLoadInst(LoadInst &LI) {
   PointerType *PTy = dyn_cast<PointerType>(LI.getOperand(0)->getType());
   Assert(PTy, "Load operand must be a pointer.", &LI);
   Type *ElTy = LI.getType();
-  Assert(LI.getAlignment() <= Value::MaximumAlignment,
+  if (MaybeAlign A = LI.getAlign()) {
+    Assert(A->value() <= Value::MaximumAlignment,
            "huge alignment values are unsupported", &LI);
+  }
   Assert(ElTy->isSized(), "loading unsized types is not allowed", &LI);
   if (LI.isAtomic()) {
     Assert(LI.getOrdering() != AtomicOrdering::Release &&
                LI.getOrdering() != AtomicOrdering::AcquireRelease,
            "Load cannot have Release ordering", &LI);
     Assert(LI.getAlignment() != 0,
            "Atomic load must specify explicit alignment", &LI);
     Assert(ElTy->isIntOrPtrTy() || ElTy->isFloatingPointTy(),

 }
 
 void Verifier::visitStoreInst(StoreInst &SI) {
   PointerType *PTy = dyn_cast<PointerType>(SI.getOperand(1)->getType());
   Assert(PTy, "Store operand must be a pointer.", &SI);
   Type *ElTy = SI.getOperand(0)->getType();
   Assert(PTy->isOpaqueOrPointeeTypeMatches(ElTy),
          "Stored value type does not match pointer operand type!", &SI, ElTy);
-  Assert(SI.getAlignment() <= Value::MaximumAlignment,
+  if (MaybeAlign A = SI.getAlign()) {
+    Assert(A->value() <= Value::MaximumAlignment,
            "huge alignment values are unsupported", &SI);
+  }
   Assert(ElTy->isSized(), "storing unsized types is not allowed", &SI);
   if (SI.isAtomic()) {
     Assert(SI.getOrdering() != AtomicOrdering::Acquire &&
                SI.getOrdering() != AtomicOrdering::AcquireRelease,
            "Store cannot have Acquire ordering", &SI);
     Assert(SI.getAlignment() != 0,
            "Atomic store must specify explicit alignment", &SI);
     Assert(ElTy->isIntOrPtrTy() || ElTy->isFloatingPointTy(),

 }
 
 void Verifier::visitAllocaInst(AllocaInst &AI) {
   SmallPtrSet<Type*, 4> Visited;
   Assert(AI.getAllocatedType()->isSized(&Visited),
          "Cannot allocate unsized type", &AI);
   Assert(AI.getArraySize()->getType()->isIntegerTy(),
          "Alloca array size must have integer type", &AI);
-  Assert(AI.getAlignment() <= Value::MaximumAlignment,
+  if (MaybeAlign A = AI.getAlign()) {
+    Assert(A->value() <= Value::MaximumAlignment,
            "huge alignment values are unsupported", &AI);
+  }
 
   if (AI.isSwiftError()) {
     verifySwiftErrorValue(&AI);
   }
 
   visitInstruction(AI);
 }
 

llvm/lib/Linker/IRMover.cpp

GlobalVariable *IRLinker::copyGlobalVariableProto(const GlobalVariable *SGVar) {
   // identical version of the symbol over in the dest module... the
   // initializer will be filled in later by LinkGlobalInits.
   GlobalVariable *NewDGV =
       new GlobalVariable(DstM, TypeMap.get(SGVar->getValueType()),
                          SGVar->isConstant(), GlobalValue::ExternalLinkage,
                          /*init*/ nullptr, SGVar->getName(),
                          /*insertbefore*/ nullptr, SGVar->getThreadLocalMode(),
                          SGVar->getAddressSpace());
-  NewDGV->setAlignment(MaybeAlign(SGVar->getAlignment()));
+  NewDGV->setAlignment(SGVar->getAlign());
   NewDGV->copyAttributesFrom(SGVar);
   return NewDGV;
 }
 
 AttributeList IRLinker::mapAttributeTypes(LLVMContext &C, AttributeList Attrs) {
   for (unsigned i = 0; i < Attrs.getNumAttrSets(); ++i) {
     for (int AttrIdx = Attribute::FirstTypeAttr;
          AttrIdx <= Attribute::LastTypeAttr; AttrIdx++) {
if (!SrcGV->hasAppendingLinkage() || !DstGV->hasAppendingLinkage())
       return stringErr(
           "Linking globals named '" + SrcGV->getName() +
           "': can only link appending global with another appending "
           "global!");
 
     if (DstGV->isConstant() != SrcGV->isConstant())
       return stringErr("Appending variables linked with different const'ness!");
 
-    if (DstGV->getAlignment() != SrcGV->getAlignment())
+    if (DstGV->getAlign() != SrcGV->getAlign())
       return stringErr(
           "Appending variables with different alignment need to be linked!");
 
     if (DstGV->getVisibility() != SrcGV->getVisibility())
       return stringErr(
           "Appending variables with different visibility need to be linked!");
 
     if (DstGV->hasGlobalUnnamedAddr() != SrcGV->hasGlobalUnnamedAddr())

llvm/lib/Target/AMDGPU/AMDGPUPromoteAlloca.cpp

bool AMDGPUPromoteAllocaImpl::handleAlloca(AllocaInst &I, bool SufficientLDS) {
   GlobalVariable *GV = new GlobalVariable(
       *Mod, GVTy, false, GlobalValue::InternalLinkage,
       UndefValue::get(GVTy),
       Twine(F->getName()) + Twine('.') + I.getName(),
       nullptr,
       GlobalVariable::NotThreadLocal,
       AMDGPUAS::LOCAL_ADDRESS);
   GV->setUnnamedAddr(GlobalValue::UnnamedAddr::Global);
-  GV->setAlignment(MaybeAlign(I.getAlignment()));
+  GV->setAlignment(I.getAlign());
 
   Value *TCntY, *TCntZ;
 
   std::tie(TCntY, TCntZ) = getLocalSizeYZ(Builder);
   Value *TIdX = getWorkitemID(Builder, 0);
   Value *TIdY = getWorkitemID(Builder, 1);
   Value *TIdZ = getWorkitemID(Builder, 2);
 

llvm/lib/Target/NVPTX/NVPTXAsmPrinter.cpp

void NVPTXAsmPrinter::printModuleLevelGV(const GlobalVariable *GVar,
 
   O << ".";
   emitPTXAddressSpace(PTy->getAddressSpace(), O);
 
   if (isManaged(*GVar)) {
     O << " .attribute(.managed)";
   }
 
-  if (GVar->getAlignment() == 0)
-    O << " .align " << (int)DL.getPrefTypeAlignment(ETy);
+  if (MaybeAlign A = GVar->getAlign())
+    O << " .align " << A->value();
   else
-    O << " .align " << GVar->getAlignment();
+    O << " .align " << (int)DL.getPrefTypeAlignment(ETy);
 
   if (ETy->isFloatingPointTy() || ETy->isPointerTy() ||
       (ETy->isIntegerTy() && ETy->getScalarSizeInBits() <= 64)) {
     O << " .";
     // Special case: ABI requires that we use .u8 for predicates
     if (ETy->isIntegerTy(1))
       O << "u8";
     else
void NVPTXAsmPrinter::emitPTXGlobalVariable(const GlobalVariable *GVar,
                                             raw_ostream &O) {
   const DataLayout &DL = getDataLayout();
 
   // GlobalVariables are always constant pointers themselves.
   Type *ETy = GVar->getValueType();
 
   O << ".";
   emitPTXAddressSpace(GVar->getType()->getAddressSpace(), O);
-  if (GVar->getAlignment() == 0)
-    O << " .align " << (int)DL.getPrefTypeAlignment(ETy);
+  if (MaybeAlign A = GVar->getAlign())
+    O << " .align " << A->value();
   else
-    O << " .align " << GVar->getAlignment();
+    O << " .align " << (int)DL.getPrefTypeAlignment(ETy);
 
   // Special case for i128
   if (ETy->isIntegerTy(128)) {
     O << " .b8 ";
     getSymbol(GVar)->print(O, MAI);
     O << "[16]";
     return;
   }

llvm/lib/Transforms/IPO/WholeProgramDevirt.cpp

auto NewInit = ConstantStruct::getAnon(
       {ConstantDataArray::get(M.getContext(), B.Before.Bytes),
        B.GV->getInitializer(),
        ConstantDataArray::get(M.getContext(), B.After.Bytes)});
   auto NewGV =
       new GlobalVariable(M, NewInit->getType(), B.GV->isConstant(),
                          GlobalVariable::PrivateLinkage, NewInit, "", B.GV);
   NewGV->setSection(B.GV->getSection());
   NewGV->setComdat(B.GV->getComdat());
-  NewGV->setAlignment(MaybeAlign(B.GV->getAlignment()));
+  NewGV->setAlignment(B.GV->getAlign());
 
   // Copy the original vtable's metadata to the anonymous global, adjusting
   // offsets as required.
   NewGV->copyMetadata(B.GV, B.Before.Bytes.size());
 
   // Build an alias named after the original global, pointing at the second
   // element (the original initializer).
   auto Alias = GlobalAlias::create(

llvm/lib/Transforms/InstCombine/InstCombineLoadStoreAlloca.cpp

 /// Returns true if V is dereferenceable for size of alloca.
 static bool isDereferenceableForAllocaSize(const Value *V, const AllocaInst *AI,
                                            const DataLayout &DL) {
   if (AI->isArrayAllocation())
     return false;
   uint64_t AllocaSize = DL.getTypeStoreSize(AI->getAllocatedType());
   if (!AllocaSize)
     return false;
-  return isDereferenceableAndAlignedPointer(V, Align(AI->getAlignment()),
+  return isDereferenceableAndAlignedPointer(V, AI->getAlign(),
                                             APInt(64, AllocaSize), DL);
 }
 
 static Instruction *simplifyAllocaArraySize(InstCombinerImpl &IC,
                                             AllocaInst &AI) {
   // Check for array size of 1 (scalar allocation).
   if (!AI.isArrayAllocation()) {
     // i32 1 is the canonical array size for scalar allocations.

llvm/lib/Transforms/Instrumentation/MemorySanitizer.cpp

if (PoisonStack && ClPoisonStackWithCall) {
       IRB.CreateCall(MS.MsanPoisonStackFn,
                      {IRB.CreatePointerCast(&I, IRB.getInt8PtrTy()), Len});
     } else {
       Value *ShadowBase, *OriginBase;
       std::tie(ShadowBase, OriginBase) = getShadowOriginPtr(
           &I, IRB, IRB.getInt8Ty(), Align(1), /*isStore*/ true);
 
       Value *PoisonValue = IRB.getInt8(PoisonStack ? ClPoisonStackPattern : 0);
-      IRB.CreateMemSet(ShadowBase, PoisonValue, Len,
-                       MaybeAlign(I.getAlignment()));
+      IRB.CreateMemSet(ShadowBase, PoisonValue, Len, I.getAlign());
     }
 
     if (PoisonStack && MS.TrackOrigins) {
       Value *Descr = getLocalVarDescription(I);
       IRB.CreateCall(MS.MsanSetAllocaOrigin4Fn,
                      {IRB.CreatePointerCast(&I, IRB.getInt8PtrTy()), Len,
                       IRB.CreatePointerCast(Descr, IRB.getInt8PtrTy()),
                       IRB.CreatePointerCast(&F, MS.IntptrTy)});