[Alignement][NFC] Deprecate untyped CreateAlignedLoad

[gchatelet]

Summary

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]

llvm/lib/CodeGen/AtomicExpandPass.cpp

1723

You don't need the .value() here, there is a MaybeAlign overload.

1739

ditto

llvm/lib/Transforms/InstCombine/InstCombineLoadStoreAlloca.cpp

468–469

remove llvm , use auto ?

[gchatelet]

• Address comments

[gchatelet]

llvm/lib/CodeGen/AtomicExpandPass.cpp

1723

Good catch. I'll do the same kind of patch for CreateAlignedStore afterwards to catch them all.

[RKSimon]

llvm/lib/Target/X86/X86InterleavedAccess.cpp

219

@gchatelet This is causing misaligned load accesses: https://bugs.llvm.org/show_bug.cgi?id=45957

[efriedma]

llvm/lib/Target/X86/X86InterleavedAccess.cpp

219

This change is NFC. Semantically, this code hasn't changed since D24681.

[jdoerfert]

llvm/lib/Target/X86/X86InterleavedAccess.cpp

219

I think the code that just copies the old alignment is faulty: https://github.com/llvm/llvm-project/blob/master/llvm/lib/Target/X86/X86InterleavedAccess.cpp#L219

llvm/include/llvm/IR/IRBuilder.h

StoreInst *CreateStore(Value *Val, Value *Ptr, bool isVolatile = false) {
     return Insert(new StoreInst(Val, Ptr, isVolatile));
   }
 
   /// Provided to resolve 'CreateAlignedLoad(Ptr, Align, "...")'
   /// correctly, instead of converting the string to 'bool' for the isVolatile
   /// parameter.
   /// FIXME: Remove this function once transition to Align is over.
   /// Use the version that takes MaybeAlign instead of this one.
-  LoadInst *CreateAlignedLoad(Type *Ty, Value *Ptr, unsigned Align,
-                              const char *Name) {
+  LLVM_ATTRIBUTE_DEPRECATED(LoadInst *CreateAlignedLoad(Type *Ty, Value *Ptr,
+                                                        unsigned Align,
+                                                        const char *Name),
+                            "Use the version that takes NaybeAlign instead") {
     return CreateAlignedLoad(Ty, Ptr, MaybeAlign(Align), Name);
   }
   LoadInst *CreateAlignedLoad(Type *Ty, Value *Ptr, MaybeAlign Align,
                               const char *Name) {
     LoadInst *LI = CreateLoad(Ty, Ptr, Name);
     LI->setAlignment(Align);
     return LI;
   }
   /// FIXME: Remove this function once transition to Align is over.
   /// Use the version that takes MaybeAlign instead of this one.
-  LoadInst *CreateAlignedLoad(Type *Ty, Value *Ptr, unsigned Align,
-                              const Twine &Name = "") {
+  LLVM_ATTRIBUTE_DEPRECATED(LoadInst *CreateAlignedLoad(Type *Ty, Value *Ptr,
+                                                        unsigned Align,
+                                                        const Twine &Name = ""),
+                            "Use the version that takes MaybeAlign instead") {
     return CreateAlignedLoad(Ty, Ptr, MaybeAlign(Align), Name);
   }
   LoadInst *CreateAlignedLoad(Type *Ty, Value *Ptr, MaybeAlign Align,
                               const Twine &Name = "") {
     LoadInst *LI = CreateLoad(Ty, Ptr, Name);
     LI->setAlignment(Align);
     return LI;
   }
   /// FIXME: Remove this function once transition to Align is over.
   /// Use the version that takes MaybeAlign instead of this one.
-  LoadInst *CreateAlignedLoad(Type *Ty, Value *Ptr, unsigned Align,
-                              bool isVolatile, const Twine &Name = "") {
+  LLVM_ATTRIBUTE_DEPRECATED(LoadInst *CreateAlignedLoad(Type *Ty, Value *Ptr,
+                                                        unsigned Align,
+                                                        bool isVolatile,
+                                                        const Twine &Name = ""),
+                            "Use the version that takes MaybeAlign instead") {
     return CreateAlignedLoad(Ty, Ptr, MaybeAlign(Align), isVolatile, Name);
   }
   LoadInst *CreateAlignedLoad(Type *Ty, Value *Ptr, MaybeAlign Align,
                               bool isVolatile, const Twine &Name = "") {
     LoadInst *LI = CreateLoad(Ty, Ptr, isVolatile, Name);
     LI->setAlignment(Align);
     return LI;
   }
 
   // Deprecated [opaque pointer types]
   LoadInst *CreateAlignedLoad(Value *Ptr, unsigned Align, const char *Name) {
     return CreateAlignedLoad(Ptr->getType()->getPointerElementType(), Ptr,
-                             Align, Name);
+                             MaybeAlign(Align), Name);
   }
   // Deprecated [opaque pointer types]
   LoadInst *CreateAlignedLoad(Value *Ptr, unsigned Align,
                               const Twine &Name = "") {
     return CreateAlignedLoad(Ptr->getType()->getPointerElementType(), Ptr,
-                             Align, Name);
+                             MaybeAlign(Align), Name);
   }
   // Deprecated [opaque pointer types]
   LoadInst *CreateAlignedLoad(Value *Ptr, unsigned Align, bool isVolatile,
                               const Twine &Name = "") {
     return CreateAlignedLoad(Ptr->getType()->getPointerElementType(), Ptr,
-                             Align, isVolatile, Name);
+                             MaybeAlign(Align), isVolatile, Name);
   }
   // Deprecated [opaque pointer types]
   LoadInst *CreateAlignedLoad(Value *Ptr, MaybeAlign Align, const char *Name) {
     return CreateAlignedLoad(Ptr->getType()->getPointerElementType(), Ptr,
                              Align, Name);
   }
   // Deprecated [opaque pointer types]
   LoadInst *CreateAlignedLoad(Value *Ptr, MaybeAlign Align,

llvm/include/llvm/IR/Instructions.h

public:
   /// Return the type that is being allocated by the instruction.
   Type *getAllocatedType() const { return AllocatedType; }
   /// for use only in special circumstances that need to generically
   /// transform a whole instruction (eg: IR linking and vectorization).
   void setAllocatedType(Type *Ty) { AllocatedType = Ty; }
 
   /// Return the alignment of the memory that is being allocated by the
   /// instruction.
+  MaybeAlign getAlign() const {
+    return decodeMaybeAlign(getSubclassDataFromInstruction() & 31);
+  }
+  // FIXME: Remove this one transition to Align is over.
   unsigned getAlignment() const {
-    if (const auto MA = decodeMaybeAlign(getSubclassDataFromInstruction() & 31))
+    if (const auto MA = getAlign())
       return MA->value();
     return 0;
   }
   void setAlignment(MaybeAlign Align);
 
   /// Return true if this alloca is in the entry block of the function and is a
   /// constant size. If so, the code generator will fold it into the
   /// prolog/epilog code, so it is basically free.

llvm/lib/CodeGen/AtomicExpandPass.cpp

bool AtomicExpand::expandAtomicOpToLibcall(
   Module *M = I->getModule();
   const DataLayout &DL = M->getDataLayout();
   IRBuilder<> Builder(I);
   IRBuilder<> AllocaBuilder(&I->getFunction()->getEntryBlock().front());
 
   bool UseSizedLibcall = canUseSizedAtomicCall(Size, Align, DL);
   Type *SizedIntTy = Type::getIntNTy(Ctx, Size * 8);
 
-  unsigned AllocaAlignment = DL.getPrefTypeAlignment(SizedIntTy);
+  const llvm::Align AllocaAlignment(DL.getPrefTypeAlignment(SizedIntTy));
 
   // TODO: the "order" argument type is "int", not int32. So
   // getInt32Ty may be wrong if the arch uses e.g. 16-bit ints.
   ConstantInt *SizeVal64 = ConstantInt::get(Type::getInt64Ty(Ctx), Size);
   assert(Ordering != AtomicOrdering::NotAtomic && "expect atomic MO");
   Constant *OrderingVal =
       ConstantInt::get(Type::getInt32Ty(Ctx), (int)toCABI(Ordering));
   Constant *Ordering2Val = nullptr;
bool AtomicExpand::expandAtomicOpToLibcall(
   Value *PtrVal = Builder.CreateBitCast(PointerOperand,
                                         Type::getInt8PtrTy(Ctx, PtrTypeAS));
   PtrVal = Builder.CreateAddrSpaceCast(PtrVal, Type::getInt8PtrTy(Ctx));
   Args.push_back(PtrVal);
 
   // 'expected' argument, if present.
   if (CASExpected) {
     AllocaCASExpected = AllocaBuilder.CreateAlloca(CASExpected->getType());
-    AllocaCASExpected->setAlignment(MaybeAlign(AllocaAlignment));
+    AllocaCASExpected->setAlignment(AllocaAlignment);
     unsigned AllocaAS =  AllocaCASExpected->getType()->getPointerAddressSpace();
 
     AllocaCASExpected_i8 =
       Builder.CreateBitCast(AllocaCASExpected,
                             Type::getInt8PtrTy(Ctx, AllocaAS));
     Builder.CreateLifetimeStart(AllocaCASExpected_i8, SizeVal64);
     Builder.CreateAlignedStore(CASExpected, AllocaCASExpected, AllocaAlignment);
     Args.push_back(AllocaCASExpected_i8);
   }
 
   // 'val' argument ('desired' for cas), if present.
   if (ValueOperand) {
     if (UseSizedLibcall) {
       Value *IntValue =
           Builder.CreateBitOrPointerCast(ValueOperand, SizedIntTy);
       Args.push_back(IntValue);
     } else {
       AllocaValue = AllocaBuilder.CreateAlloca(ValueOperand->getType());
-      AllocaValue->setAlignment(MaybeAlign(AllocaAlignment));
+      AllocaValue->setAlignment(AllocaAlignment);
       AllocaValue_i8 =
           Builder.CreateBitCast(AllocaValue, Type::getInt8PtrTy(Ctx));
       Builder.CreateLifetimeStart(AllocaValue_i8, SizeVal64);
       Builder.CreateAlignedStore(ValueOperand, AllocaValue, AllocaAlignment);
       Args.push_back(AllocaValue_i8);
     }
   }
 
   // 'ret' argument.
   if (!CASExpected && HasResult && !UseSizedLibcall) {
     AllocaResult = AllocaBuilder.CreateAlloca(I->getType());
-    AllocaResult->setAlignment(MaybeAlign(AllocaAlignment));
+    AllocaResult->setAlignment(AllocaAlignment);
     unsigned AllocaAS =  AllocaResult->getType()->getPointerAddressSpace();
     AllocaResult_i8 =
       Builder.CreateBitCast(AllocaResult, Type::getInt8PtrTy(Ctx, AllocaAS));
     Builder.CreateLifetimeStart(AllocaResult_i8, SizeVal64);
     Args.push_back(AllocaResult_i8);
   }
 
   // 'ordering' ('success_order' for cas) argument.

llvm/lib/CodeGen/InterleavedLoadCombinePass.cpp

bool InterleavedLoadCombineImpl::combine(std::list<VectorInfo> &InterleavedLoad,
   }
 
   // Create a pointer cast for the wide load.
   auto CI = Builder.CreatePointerCast(InsertionPoint->getOperand(0),
                                       ILTy->getPointerTo(),
                                       "interleaved.wide.ptrcast");
 
   // Create the wide load and update the MemorySSA.
-  auto LI = Builder.CreateAlignedLoad(ILTy, CI, InsertionPoint->getAlignment(),
+  auto LI = Builder.CreateAlignedLoad(ILTy, CI, InsertionPoint->getAlign(),
                                       "interleaved.wide.load");
   auto MSSAU = MemorySSAUpdater(&MSSA);
   MemoryUse *MSSALoad = cast<MemoryUse>(MSSAU.createMemoryAccessBefore(
       LI, nullptr, MSSA.getMemoryAccess(InsertionPoint)));
   MSSAU.insertUse(MSSALoad);
 
   // Create the final SVIs and replace all uses.
   int i = 0;

llvm/lib/CodeGen/PreISelIntrinsicLowering.cpp

for (auto I = F.use_begin(), E = F.use_end(); I != E;) {
     ++I;
     if (!CI || CI->getCalledValue() != &F)
       continue;
 
     IRBuilder<> B(CI);
     Value *OffsetPtr =
         B.CreateGEP(Int8Ty, CI->getArgOperand(0), CI->getArgOperand(1));
     Value *OffsetPtrI32 = B.CreateBitCast(OffsetPtr, Int32PtrTy);
-    Value *OffsetI32 = B.CreateAlignedLoad(Int32Ty, OffsetPtrI32, 4);
+    Value *OffsetI32 = B.CreateAlignedLoad(Int32Ty, OffsetPtrI32, Align(4));
 
     Value *ResultPtr = B.CreateGEP(Int8Ty, CI->getArgOperand(0), OffsetI32);
 
     CI->replaceAllUsesWith(ResultPtr);
     CI->eraseFromParent();
     Changed = true;
   }
 

llvm/lib/CodeGen/ScalarizeMaskedMemIntrin.cpp

 //  br i1 %10, label %cond.load4, label %else5
 //
 static void scalarizeMaskedLoad(CallInst *CI, bool &ModifiedDT) {
   Value *Ptr = CI->getArgOperand(0);
   Value *Alignment = CI->getArgOperand(1);
   Value *Mask = CI->getArgOperand(2);
   Value *Src0 = CI->getArgOperand(3);
 
-  unsigned AlignVal = cast<ConstantInt>(Alignment)->getZExtValue();
+  const Align AlignVal = cast<ConstantInt>(Alignment)->getAlignValue();
   VectorType *VecType = cast<VectorType>(CI->getType());
 
   Type *EltTy = VecType->getElementType();
 
   IRBuilder<> Builder(CI->getContext());
   Instruction *InsertPt = CI;
   BasicBlock *IfBlock = CI->getParent();
 
   Builder.SetInsertPoint(InsertPt);
   Builder.SetCurrentDebugLocation(CI->getDebugLoc());
 
   // Short-cut if the mask is all-true.
   if (isa<Constant>(Mask) && cast<Constant>(Mask)->isAllOnesValue()) {
     Value *NewI = Builder.CreateAlignedLoad(VecType, Ptr, AlignVal);
     CI->replaceAllUsesWith(NewI);
     CI->eraseFromParent();
     return;
   }
 
   // Adjust alignment for the scalar instruction.
-  AlignVal = MinAlign(AlignVal, EltTy->getPrimitiveSizeInBits() / 8);
+  const Align AdjustedAlignVal =
+      commonAlignment(AlignVal, EltTy->getPrimitiveSizeInBits() / 8);
   // Bitcast %addr from i8* to EltTy*
   Type *NewPtrType =
       EltTy->getPointerTo(Ptr->getType()->getPointerAddressSpace());
   Value *FirstEltPtr = Builder.CreateBitCast(Ptr, NewPtrType);
   unsigned VectorWidth = VecType->getNumElements();
 
   // The result vector
   Value *VResult = Src0;
 
   if (isConstantIntVector(Mask)) {
     for (unsigned Idx = 0; Idx < VectorWidth; ++Idx) {
       if (cast<Constant>(Mask)->getAggregateElement(Idx)->isNullValue())
         continue;
       Value *Gep = Builder.CreateConstInBoundsGEP1_32(EltTy, FirstEltPtr, Idx);
-      LoadInst *Load = Builder.CreateAlignedLoad(EltTy, Gep, AlignVal);
+      LoadInst *Load = Builder.CreateAlignedLoad(EltTy, Gep, AdjustedAlignVal);
       VResult = Builder.CreateInsertElement(VResult, Load, Idx);
     }
     CI->replaceAllUsesWith(VResult);
     CI->eraseFromParent();
     return;
   }
 
   // If the mask is not v1i1, use scalar bit test operations. This generates
for (unsigned Idx = 0; Idx < VectorWidth; ++Idx) {
     //  %Elt = load i32* %EltAddr
     //  VResult = insertelement <16 x i32> VResult, i32 %Elt, i32 Idx
     //
     BasicBlock *CondBlock = IfBlock->splitBasicBlock(InsertPt->getIterator(),
                                                      "cond.load");
     Builder.SetInsertPoint(InsertPt);
 
     Value *Gep = Builder.CreateConstInBoundsGEP1_32(EltTy, FirstEltPtr, Idx);
-    LoadInst *Load = Builder.CreateAlignedLoad(EltTy, Gep, AlignVal);
+    LoadInst *Load = Builder.CreateAlignedLoad(EltTy, Gep, AdjustedAlignVal);
     Value *NewVResult = Builder.CreateInsertElement(VResult, Load, Idx);
 
     // Create "else" block, fill it in the next iteration
     BasicBlock *NewIfBlock =
         CondBlock->splitBasicBlock(InsertPt->getIterator(), "else");
     Builder.SetInsertPoint(InsertPt);
     Instruction *OldBr = IfBlock->getTerminator();
     BranchInst::Create(CondBlock, NewIfBlock, Predicate, OldBr);
static void scalarizeMaskedGather(CallInst *CI, bool &ModifiedDT) {
   unsigned VectorWidth = VecType->getNumElements();
 
   // Shorten the way if the mask is a vector of constants.
   if (isConstantIntVector(Mask)) {
     for (unsigned Idx = 0; Idx < VectorWidth; ++Idx) {
       if (cast<Constant>(Mask)->getAggregateElement(Idx)->isNullValue())
         continue;
       Value *Ptr = Builder.CreateExtractElement(Ptrs, Idx, "Ptr" + Twine(Idx));
-      LoadInst *Load =
-          Builder.CreateAlignedLoad(EltTy, Ptr, AlignVal, "Load" + Twine(Idx));
+      LoadInst *Load = Builder.CreateAlignedLoad(
+          EltTy, Ptr, MaybeAlign(AlignVal), "Load" + Twine(Idx));
       VResult =
           Builder.CreateInsertElement(VResult, Load, Idx, "Res" + Twine(Idx));
     }
     CI->replaceAllUsesWith(VResult);
     CI->eraseFromParent();
     return;
   }
 
for (unsigned Idx = 0; Idx < VectorWidth; ++Idx) {
     //  %EltAddr = getelementptr i32* %1, i32 0
     //  %Elt = load i32* %EltAddr
     //  VResult = insertelement <16 x i32> VResult, i32 %Elt, i32 Idx
     //
     BasicBlock *CondBlock = IfBlock->splitBasicBlock(InsertPt, "cond.load");
     Builder.SetInsertPoint(InsertPt);
 
     Value *Ptr = Builder.CreateExtractElement(Ptrs, Idx, "Ptr" + Twine(Idx));
-    LoadInst *Load =
-        Builder.CreateAlignedLoad(EltTy, Ptr, AlignVal, "Load" + Twine(Idx));
+    LoadInst *Load = Builder.CreateAlignedLoad(EltTy, Ptr, MaybeAlign(AlignVal),
+                                               "Load" + Twine(Idx));
     Value *NewVResult =
         Builder.CreateInsertElement(VResult, Load, Idx, "Res" + Twine(Idx));
 
     // Create "else" block, fill it in the next iteration
     BasicBlock *NewIfBlock = CondBlock->splitBasicBlock(InsertPt, "else");
     Builder.SetInsertPoint(InsertPt);
     Instruction *OldBr = IfBlock->getTerminator();
     BranchInst::Create(CondBlock, NewIfBlock, Predicate, OldBr);
static void scalarizeMaskedExpandLoad(CallInst *CI, bool &ModifiedDT) {
 
   // Shorten the way if the mask is a vector of constants.
   if (isConstantIntVector(Mask)) {
     unsigned MemIndex = 0;
     for (unsigned Idx = 0; Idx < VectorWidth; ++Idx) {
       if (cast<Constant>(Mask)->getAggregateElement(Idx)->isNullValue())
         continue;
       Value *NewPtr = Builder.CreateConstInBoundsGEP1_32(EltTy, Ptr, MemIndex);
-      LoadInst *Load =
-          Builder.CreateAlignedLoad(EltTy, NewPtr, 1, "Load" + Twine(Idx));
+      LoadInst *Load = Builder.CreateAlignedLoad(EltTy, NewPtr, Align(1),
+                                                 "Load" + Twine(Idx));
       VResult =
           Builder.CreateInsertElement(VResult, Load, Idx, "Res" + Twine(Idx));
       ++MemIndex;
     }
     CI->replaceAllUsesWith(VResult);
     CI->eraseFromParent();
     return;
   }
for (unsigned Idx = 0; Idx < VectorWidth; ++Idx) {
     //  %EltAddr = getelementptr i32* %1, i32 0
     //  %Elt = load i32* %EltAddr
     //  VResult = insertelement <16 x i32> VResult, i32 %Elt, i32 Idx
     //
     BasicBlock *CondBlock = IfBlock->splitBasicBlock(InsertPt->getIterator(),
                                                      "cond.load");
     Builder.SetInsertPoint(InsertPt);
 
-    LoadInst *Load = Builder.CreateAlignedLoad(EltTy, Ptr, 1);
+    LoadInst *Load = Builder.CreateAlignedLoad(EltTy, Ptr, Align(1));
     Value *NewVResult = Builder.CreateInsertElement(VResult, Load, Idx);
 
     // Move the pointer if there are more blocks to come.
     Value *NewPtr;
     if ((Idx + 1) != VectorWidth)
       NewPtr = Builder.CreateConstInBoundsGEP1_32(EltTy, Ptr, 1);
 
     // Create "else" block, fill it in the next iteration

llvm/lib/IR/AutoUpgrade.cpp

if (!NewFn) {
     } else if (IsX86 && (Name.startswith("avx.vbroadcastf128") ||
                          Name == "avx2.vbroadcasti128")) {
       // Replace vbroadcastf128/vbroadcasti128 with a vector load+shuffle.
       Type *EltTy = CI->getType()->getVectorElementType();
       unsigned NumSrcElts = 128 / EltTy->getPrimitiveSizeInBits();
       Type *VT = VectorType::get(EltTy, NumSrcElts);
       Value *Op = Builder.CreatePointerCast(CI->getArgOperand(0),
                                             PointerType::getUnqual(VT));
-      Value *Load = Builder.CreateAlignedLoad(VT, Op, 1);
+      Value *Load = Builder.CreateAlignedLoad(VT, Op, Align(1));
       if (NumSrcElts == 2)
         Rep = Builder.CreateShuffleVector(Load, UndefValue::get(Load->getType()),
                                           { 0, 1, 0, 1 });
       else
         Rep = Builder.CreateShuffleVector(Load, UndefValue::get(Load->getType()),
                                           { 0, 1, 2, 3, 0, 1, 2, 3 });
     } else if (IsX86 && (Name.startswith("avx512.mask.shuf.i") ||
                          Name.startswith("avx512.mask.shuf.f"))) {

           C, ConstantAsMetadata::get(ConstantInt::get(Type::getInt32Ty(C), 1)));
 
       Value *Ptr = CI->getArgOperand(0);
       VectorType *VTy = cast<VectorType>(CI->getType());
 
       // Convert the type of the pointer to a pointer to the stored type.
       Value *BC =
           Builder.CreateBitCast(Ptr, PointerType::getUnqual(VTy), "cast");
-      LoadInst *LI = Builder.CreateAlignedLoad(VTy, BC, VTy->getBitWidth() / 8);
+      LoadInst *LI =
+          Builder.CreateAlignedLoad(VTy, BC, Align(VTy->getBitWidth() / 8));
       LI->setMetadata(M->getMDKindID("nontemporal"), Node);
       Rep = LI;
     } else if (IsX86 && (Name.startswith("fma.vfmadd.") ||
                          Name.startswith("fma.vfmsub.") ||
                          Name.startswith("fma.vfnmadd.") ||
                          Name.startswith("fma.vfnmsub."))) {
       bool NegMul = Name[6] == 'n';
       bool NegAcc = NegMul ? Name[8] == 's' : Name[7] == 's';

llvm/lib/Target/AMDGPU/AMDGPULowerKernelArguments.cpp

if (IsV3 && Size >= 32) {
       V4Ty = VectorType::get(VT->getVectorElementType(), 4);
       // Use the hack that clang uses to avoid SelectionDAG ruining v3 loads
       AdjustedArgTy = V4Ty;
     }
 
     ArgPtr = Builder.CreateBitCast(ArgPtr, AdjustedArgTy->getPointerTo(AS),
                                    ArgPtr->getName() + ".cast");
     LoadInst *Load =
-        Builder.CreateAlignedLoad(AdjustedArgTy, ArgPtr, AdjustedAlign.value());
+        Builder.CreateAlignedLoad(AdjustedArgTy, ArgPtr, AdjustedAlign);
     Load->setMetadata(LLVMContext::MD_invariant_load, MDNode::get(Ctx, {}));
 
     MDBuilder MDB(Ctx);
 
     if (isa<PointerType>(ArgTy)) {
       if (Arg.hasNonNullAttr())
         Load->setMetadata(LLVMContext::MD_nonnull, MDNode::get(Ctx, {}));
 

llvm/lib/Target/AMDGPU/AMDGPUPromoteAlloca.cpp

AMDGPUPromoteAlloca::getLocalSizeYZ(IRBuilder<> &Builder) {
   Type *I32Ty = Type::getInt32Ty(Mod->getContext());
   Value *CastDispatchPtr = Builder.CreateBitCast(
     DispatchPtr, PointerType::get(I32Ty, AMDGPUAS::CONSTANT_ADDRESS));
 
   // We could do a single 64-bit load here, but it's likely that the basic
   // 32-bit and extract sequence is already present, and it is probably easier
   // to CSE this. The loads should be mergable later anyway.
   Value *GEPXY = Builder.CreateConstInBoundsGEP1_64(I32Ty, CastDispatchPtr, 1);
-  LoadInst *LoadXY = Builder.CreateAlignedLoad(I32Ty, GEPXY, 4);
+  LoadInst *LoadXY = Builder.CreateAlignedLoad(I32Ty, GEPXY, Align(4));
 
   Value *GEPZU = Builder.CreateConstInBoundsGEP1_64(I32Ty, CastDispatchPtr, 2);
-  LoadInst *LoadZU = Builder.CreateAlignedLoad(I32Ty, GEPZU, 4);
+  LoadInst *LoadZU = Builder.CreateAlignedLoad(I32Ty, GEPZU, Align(4));
 
   MDNode *MD = MDNode::get(Mod->getContext(), None);
   LoadXY->setMetadata(LLVMContext::MD_invariant_load, MD);
   LoadZU->setMetadata(LLVMContext::MD_invariant_load, MD);
   ST.makeLIDRangeMetadata(LoadZU);
 
   // Extract y component. Upper half of LoadZU should be zero already.
   Value *Y = Builder.CreateLShr(LoadXY, 16);

llvm/lib/Target/ARM/ARMParallelDSP.cpp

IRBuilder<NoFolder> IRB(DomLoad->getParent(),
                           ++BasicBlock::iterator(DomLoad));
 
   // Bitcast the pointer to a wider type and create the wide load, while making
   // sure to maintain the original alignment as this prevents ldrd from being
   // generated when it could be illegal due to memory alignment.
   const unsigned AddrSpace = DomLoad->getPointerAddressSpace();
   Value *VecPtr = IRB.CreateBitCast(Base->getPointerOperand(),
                                     LoadTy->getPointerTo(AddrSpace));
-  LoadInst *WideLoad = IRB.CreateAlignedLoad(LoadTy, VecPtr,
-                                             Base->getAlignment());
+  LoadInst *WideLoad = IRB.CreateAlignedLoad(LoadTy, VecPtr, Base->getAlign());
 
   // Make sure everything is in the correct order in the basic block.
   MoveBefore(Base->getPointerOperand(), VecPtr);
   MoveBefore(VecPtr, WideLoad);
 
   // From the wide load, create two values that equal the original two loads.
   // Loads[0] needs trunc while Loads[1] needs a lshr and trunc.
   // TODO: Support big-endian as well.

llvm/lib/Target/X86/X86ISelLowering.cpp

X86TargetLowering::lowerIdempotentRMWIntoFencedLoad(AtomicRMWInst *AI) const {
 
   Function *MFence =
       llvm::Intrinsic::getDeclaration(M, Intrinsic::x86_sse2_mfence);
   Builder.CreateCall(MFence, {});
 
   // Finally we can emit the atomic load.
   LoadInst *Loaded =
       Builder.CreateAlignedLoad(AI->getType(), AI->getPointerOperand(),
-                                AI->getType()->getPrimitiveSizeInBits());
+                                Align(AI->getType()->getPrimitiveSizeInBits()));
   Loaded->setAtomic(Order, SSID);
   AI->replaceAllUsesWith(Loaded);
   AI->eraseFromParent();
   return Loaded;
 }
 
 bool X86TargetLowering::lowerAtomicStoreAsStoreSDNode(const StoreInst &SI) const {
   if (!SI.isUnordered())

llvm/lib/Target/X86/X86InterleavedAccess.cpp

if (VecLength == 768 || VecLength == 1536) {
     VecBasePtr = Builder.CreateBitCast(LI->getPointerOperand(), VecBasePtrTy);
   }
   // Generate N loads of T type.
   for (unsigned i = 0; i < NumLoads; i++) {
     // TODO: Support inbounds GEP.
     Value *NewBasePtr =
         Builder.CreateGEP(VecBaseTy, VecBasePtr, Builder.getInt32(i));
     Instruction *NewLoad =
-        Builder.CreateAlignedLoad(VecBaseTy, NewBasePtr, LI->getAlignment());
+        Builder.CreateAlignedLoad(VecBaseTy, NewBasePtr, LI->getAlign());
     DecomposedVectors.push_back(NewLoad);
   }
 }
 
 // Changing the scale of the vector type by reducing the number of elements and
 // doubling the scalar size.
 static MVT scaleVectorType(MVT VT) {
   unsigned ScalarSize = VT.getVectorElementType().getScalarSizeInBits() * 2;

llvm/lib/Transforms/InstCombine/InstCombineCalls.cpp

static Value *simplifyX86vpermv(const IntrinsicInst &II,
   auto V2 = UndefValue::get(VecTy);
   return Builder.CreateShuffleVector(V1, V2, ShuffleMask);
 }
 
 // TODO, Obvious Missing Transforms:
 // * Narrow width by halfs excluding zero/undef lanes
 Value *InstCombiner::simplifyMaskedLoad(IntrinsicInst &II) {
   Value *LoadPtr = II.getArgOperand(0);
-  unsigned Alignment = cast<ConstantInt>(II.getArgOperand(1))->getZExtValue();
+  const Align Alignment =
+      cast<ConstantInt>(II.getArgOperand(1))->getAlignValue();
 
   // If the mask is all ones or undefs, this is a plain vector load of the 1st
   // argument.
   if (maskIsAllOneOrUndef(II.getArgOperand(2)))
     return Builder.CreateAlignedLoad(II.getType(), LoadPtr, Alignment,
                                      "unmaskedload");
 
   // If we can unconditionally load from this address, replace with a
   // load/select idiom. TODO: use DT for context sensitive query
-  if (isDereferenceableAndAlignedPointer(
-          LoadPtr, II.getType(), MaybeAlign(Alignment),
-          II.getModule()->getDataLayout(), &II, nullptr)) {
+  if (isDereferenceableAndAlignedPointer(LoadPtr, II.getType(), Alignment,
+                                         II.getModule()->getDataLayout(), &II,
+                                         nullptr)) {
     Value *LI = Builder.CreateAlignedLoad(II.getType(), LoadPtr, Alignment,
                                          "unmaskedload");
     return Builder.CreateSelect(II.getArgOperand(2), LI, II.getArgOperand(3));
   }
 
   return nullptr;
 }
 
static Value *simplifyNeonVld1(const IntrinsicInst &II,
   unsigned Alignment = IntrAlign->getLimitedValue() < MemAlign ?
                        MemAlign : IntrAlign->getLimitedValue();
 
   if (!isPowerOf2_32(Alignment))
     return nullptr;
 
   auto *BCastInst = Builder.CreateBitCast(II.getArgOperand(0),
                                           PointerType::get(II.getType(), 0));
-  return Builder.CreateAlignedLoad(II.getType(), BCastInst, Alignment);
+  return Builder.CreateAlignedLoad(II.getType(), BCastInst, Align(Alignment));
 }
 
 // Returns true iff the 2 intrinsics have the same operands, limiting the
 // comparison to the first NumOperands.
 static bool haveSameOperands(const IntrinsicInst &I, const IntrinsicInst &E,
                              unsigned NumOperands) {
   assert(I.getNumArgOperands() >= NumOperands && "Not enough operands");
   assert(E.getNumArgOperands() >= NumOperands && "Not enough operands");

llvm/lib/Transforms/InstCombine/InstCombineLoadStoreAlloca.cpp

LoadInst *InstCombiner::combineLoadToNewType(LoadInst &LI, Type *NewTy,
   Value *Ptr = LI.getPointerOperand();
   unsigned AS = LI.getPointerAddressSpace();
   Value *NewPtr = nullptr;
   if (!(match(Ptr, m_BitCast(m_Value(NewPtr))) &&
         NewPtr->getType()->getPointerElementType() == NewTy &&
         NewPtr->getType()->getPointerAddressSpace() == AS))
     NewPtr = Builder.CreateBitCast(Ptr, NewTy->getPointerTo(AS));
 
-  unsigned Align = LI.getAlignment();
-  if (!Align)
     // If old load did not have an explicit alignment specified,
     // manually preserve the implied (ABI) alignment of the load.
     // Else we may inadvertently incorrectly over-promise alignment.
-    Align = getDataLayout().getABITypeAlignment(LI.getType());
+  const auto Align =
+      getDataLayout().getValueOrABITypeAlignment(LI.getAlign(), LI.getType());
 
   LoadInst *NewLoad = Builder.CreateAlignedLoad(
       NewTy, NewPtr, Align, LI.isVolatile(), LI.getName() + Suffix);
   NewLoad->setAtomic(LI.getOrdering(), LI.getSyncScopeID());
   copyMetadataForLoad(*NewLoad, LI);
   return NewLoad;
 }
 
if (auto *ST = dyn_cast<StructType>(T)) {
 
     // We don't want to break loads with padding here as we'd loose
     // the knowledge that padding exists for the rest of the pipeline.
     const DataLayout &DL = IC.getDataLayout();
     auto *SL = DL.getStructLayout(ST);
     if (SL->hasPadding())
       return nullptr;
 
-    auto Align = LI.getAlignment();
-    if (!Align)
-      Align = DL.getABITypeAlignment(ST);
+    const auto Align = DL.getValueOrABITypeAlignment(LI.getAlign(), ST);
 
     auto *Addr = LI.getPointerOperand();
     auto *IdxType = Type::getInt32Ty(T->getContext());
     auto *Zero = ConstantInt::get(IdxType, 0);
 
     Value *V = UndefValue::get(T);
     for (unsigned i = 0; i < NumElements; i++) {
       Value *Indices[2] = {
         Zero,
         ConstantInt::get(IdxType, i),
       };
       auto *Ptr = IC.Builder.CreateInBoundsGEP(ST, Addr, makeArrayRef(Indices),
                                                Name + ".elt");
-      auto EltAlign = MinAlign(Align, SL->getElementOffset(i));
-      auto *L = IC.Builder.CreateAlignedLoad(ST->getElementType(i), Ptr,
-                                             EltAlign, Name + ".unpack");
+      auto *L = IC.Builder.CreateAlignedLoad(
+          ST->getElementType(i), Ptr,
+          commonAlignment(Align, SL->getElementOffset(i)), Name + ".unpack");
       // Propagate AA metadata. It'll still be valid on the narrowed load.
       AAMDNodes AAMD;
       LI.getAAMetadata(AAMD);
       L->setAAMetadata(AAMD);
       V = IC.Builder.CreateInsertValue(V, L, i);
     }
 
     V->setName(Name);
if (auto *AT = dyn_cast<ArrayType>(T)) {
     // arrays of arbitrary size but this has a terrible impact on compile time.
     // The threshold here is chosen arbitrarily, maybe needs a little bit of
     // tuning.
     if (NumElements > IC.MaxArraySizeForCombine)
       return nullptr;
 
     const DataLayout &DL = IC.getDataLayout();
     auto EltSize = DL.getTypeAllocSize(ET);
-    auto Align = LI.getAlignment();
-    if (!Align)
-      Align = DL.getABITypeAlignment(T);
+    const auto Align = DL.getValueOrABITypeAlignment(LI.getAlign(), T);
 
     auto *Addr = LI.getPointerOperand();
     auto *IdxType = Type::getInt64Ty(T->getContext());
     auto *Zero = ConstantInt::get(IdxType, 0);
 
     Value *V = UndefValue::get(T);
     uint64_t Offset = 0;
     for (uint64_t i = 0; i < NumElements; i++) {
       Value *Indices[2] = {
         Zero,
         ConstantInt::get(IdxType, i),
       };
       auto *Ptr = IC.Builder.CreateInBoundsGEP(AT, Addr, makeArrayRef(Indices),
                                                Name + ".elt");
-      auto *L = IC.Builder.CreateAlignedLoad(
-          AT->getElementType(), Ptr, MinAlign(Align, Offset), Name + ".unpack");
+      auto *L = IC.Builder.CreateAlignedLoad(AT->getElementType(), Ptr,
+                                             commonAlignment(Align, Offset),
+                                             Name + ".unpack");
       AAMDNodes AAMD;
       LI.getAAMetadata(AAMD);
       L->setAAMetadata(AAMD);
       V = IC.Builder.CreateInsertValue(V, L, i);
       Offset += EltSize;
     }
 
     V->setName(Name);

llvm/lib/Transforms/Instrumentation/DataFlowSanitizer.cpp

Value *DFSanFunction::loadShadow(Value *Addr, uint64_t Size, uint64_t Align,
   if (AllocaInst *AI = dyn_cast<AllocaInst>(Addr)) {
     const auto i = AllocaShadowMap.find(AI);
     if (i != AllocaShadowMap.end()) {
       IRBuilder<> IRB(Pos);
       return IRB.CreateLoad(DFS.ShadowTy, i->second);
     }
   }
 
-  uint64_t ShadowAlign = Align * DFS.ShadowWidth / 8;
+  const MaybeAlign ShadowAlign(Align * DFS.ShadowWidth / 8);
   SmallVector<const Value *, 2> Objs;
   GetUnderlyingObjects(Addr, Objs, Pos->getModule()->getDataLayout());
   bool AllConstants = true;
   for (const Value *Obj : Objs) {
     if (isa<Function>(Obj) || isa<BlockAddress>(Obj))
       continue;
     if (isa<GlobalVariable>(Obj) && cast<GlobalVariable>(Obj)->isConstant())
       continue;
 
     AllConstants = false;
     break;
   }
   if (AllConstants)
     return DFS.ZeroShadow;
 
   Value *ShadowAddr = DFS.getShadowAddress(Addr, Pos);
   switch (Size) {
   case 0:
     return DFS.ZeroShadow;
   case 1: {
     LoadInst *LI = new LoadInst(DFS.ShadowTy, ShadowAddr, "", Pos);
-    LI->setAlignment(MaybeAlign(ShadowAlign));
+    LI->setAlignment(ShadowAlign);
     return LI;
   }
   case 2: {
     IRBuilder<> IRB(Pos);
     Value *ShadowAddr1 = IRB.CreateGEP(DFS.ShadowTy, ShadowAddr,
                                        ConstantInt::get(DFS.IntptrTy, 1));
     return combineShadows(
         IRB.CreateAlignedLoad(DFS.ShadowTy, ShadowAddr, ShadowAlign),

llvm/lib/Transforms/Instrumentation/MemorySanitizer.cpp

if (Argument *A = dyn_cast<Argument>(V)) {
               (void)Cpy;
             }
             *ShadowPtr = getCleanShadow(V);
           } else {
             if (Overflow) {
               // ParamTLS overflow.
               *ShadowPtr = getCleanShadow(V);
             } else {
-              *ShadowPtr = EntryIRB.CreateAlignedLoad(
-                  getShadowTy(&FArg), Base, kShadowTLSAlignment.value());
+              *ShadowPtr = EntryIRB.CreateAlignedLoad(getShadowTy(&FArg), Base,
+                                                      kShadowTLSAlignment);
             }
           }
           LLVM_DEBUG(dbgs()
                      << "  ARG:    " << FArg << " ==> " << **ShadowPtr << "\n");
           if (MS.TrackOrigins && !Overflow) {
             Value *OriginPtr =
                 getOriginPtrForArgument(&FArg, EntryIRB, ArgOffset);
             setOrigin(A, EntryIRB.CreateLoad(MS.OriginTy, OriginPtr));
void visitLoadInst(LoadInst &I) {
     IRBuilder<> IRB(I.getNextNode());
     Type *ShadowTy = getShadowTy(&I);
     Value *Addr = I.getPointerOperand();
     Value *ShadowPtr = nullptr, *OriginPtr = nullptr;
     const Align Alignment = assumeAligned(I.getAlignment());
     if (PropagateShadow) {
       std::tie(ShadowPtr, OriginPtr) =
           getShadowOriginPtr(Addr, IRB, ShadowTy, Alignment, /*isStore*/ false);
-      setShadow(&I, IRB.CreateAlignedLoad(ShadowTy, ShadowPtr,
-                                          Alignment.value(), "_msld"));
+      setShadow(&I,
+                IRB.CreateAlignedLoad(ShadowTy, ShadowPtr, Alignment, "_msld"));
     } else {
       setShadow(&I, getCleanShadow(&I));
     }
 
     if (ClCheckAccessAddress)
       insertShadowCheck(I.getPointerOperand(), &I);
 
     if (I.isAtomic())
       I.setOrdering(addAcquireOrdering(I.getOrdering()));
 
     if (MS.TrackOrigins) {
       if (PropagateShadow) {
         const Align OriginAlignment = std::max(kMinOriginAlignment, Alignment);
-        setOrigin(&I, IRB.CreateAlignedLoad(MS.OriginTy, OriginPtr,
-                                            OriginAlignment.value()));
+        setOrigin(
+            &I, IRB.CreateAlignedLoad(MS.OriginTy, OriginPtr, OriginAlignment));
       } else {
         setOrigin(&I, getCleanOrigin());
       }
     }
   }
 
   /// Instrument StoreInst
   ///
bool handleVectorLoadIntrinsic(IntrinsicInst &I) {
     Type *ShadowTy = getShadowTy(&I);
     Value *ShadowPtr = nullptr, *OriginPtr = nullptr;
     if (PropagateShadow) {
       // We don't know the pointer alignment (could be unaligned SSE load!).
       // Have to assume to worst case.
       const Align Alignment = Align::None();
       std::tie(ShadowPtr, OriginPtr) =
           getShadowOriginPtr(Addr, IRB, ShadowTy, Alignment, /*isStore*/ false);
-      setShadow(&I, IRB.CreateAlignedLoad(ShadowTy, ShadowPtr,
-                                          Alignment.value(), "_msld"));
+      setShadow(&I,
+                IRB.CreateAlignedLoad(ShadowTy, ShadowPtr, Alignment, "_msld"));
     } else {
       setShadow(&I, getCleanShadow(&I));
     }
 
     if (ClCheckAccessAddress)
       insertShadowCheck(Addr, &I);
 
     if (MS.TrackOrigins) {
void handleLdmxcsr(IntrinsicInst &I) {
     const Align Alignment = Align::None();
     Value *ShadowPtr, *OriginPtr;
     std::tie(ShadowPtr, OriginPtr) =
         getShadowOriginPtr(Addr, IRB, Ty, Alignment, /*isStore*/ false);
 
     if (ClCheckAccessAddress)
       insertShadowCheck(Addr, &I);
 
-    Value *Shadow =
-        IRB.CreateAlignedLoad(Ty, ShadowPtr, Alignment.value(), "_ldmxcsr");
+    Value *Shadow = IRB.CreateAlignedLoad(Ty, ShadowPtr, Alignment, "_ldmxcsr");
     Value *Origin = MS.TrackOrigins ? IRB.CreateLoad(MS.OriginTy, OriginPtr)
                                     : getCleanOrigin();
     insertShadowCheck(Shadow, Origin, &I);
   }
 
   void handleMaskedStore(IntrinsicInst &I) {
     IRBuilder<> IRB(&I);
     Value *V = I.getArgOperand(0);
if (CS.isCall()) {
       // Anything inserted there will be instrumented by MSan later!
       NextInsn = NormalDest->getFirstInsertionPt();
       assert(NextInsn != NormalDest->end() &&
              "Could not find insertion point for retval shadow load");
     }
     IRBuilder<> IRBAfter(&*NextInsn);
     Value *RetvalShadow = IRBAfter.CreateAlignedLoad(
         getShadowTy(&I), getShadowPtrForRetval(&I, IRBAfter),
-        kShadowTLSAlignment.value(), "_msret");
+        kShadowTLSAlignment, "_msret");
     setShadow(&I, RetvalShadow);
     if (MS.TrackOrigins)
       setOrigin(&I, IRBAfter.CreateLoad(MS.OriginTy,
                                         getOriginPtrForRetval(IRBAfter)));
   }
 
   bool isAMustTailRetVal(Value *RetVal) {
     if (auto *I = dyn_cast<BitCastInst>(RetVal)) {

llvm/lib/Transforms/Scalar/SROA.cpp

#endif
   }
 
   Value *rewriteVectorizedLoadInst() {
     unsigned BeginIndex = getIndex(NewBeginOffset);
     unsigned EndIndex = getIndex(NewEndOffset);
     assert(EndIndex > BeginIndex && "Empty vector!");
 
     Value *V = IRB.CreateAlignedLoad(NewAI.getAllocatedType(), &NewAI,
-                                     NewAI.getAlignment(), "load");
+                                     NewAI.getAlign(), "load");
     return extractVector(IRB, V, BeginIndex, EndIndex, "vec");
   }
 
   Value *rewriteIntegerLoad(LoadInst &LI) {
     assert(IntTy && "We cannot insert an integer to the alloca");
     assert(!LI.isVolatile());
     Value *V = IRB.CreateAlignedLoad(NewAI.getAllocatedType(), &NewAI,
-                                     NewAI.getAlignment(), "load");
+                                     NewAI.getAlign(), "load");
     V = convertValue(DL, IRB, V, IntTy);
     assert(NewBeginOffset >= NewAllocaBeginOffset && "Out of bounds offset");
     uint64_t Offset = NewBeginOffset - NewAllocaBeginOffset;
     if (Offset > 0 || NewEndOffset < NewAllocaEndOffset) {
       IntegerType *ExtractTy = Type::getIntNTy(LI.getContext(), SliceSize * 8);
       V = extractInteger(DL, IRB, V, ExtractTy, Offset, "extract");
     }
     // It is possible that the extracted type is not the load type. This
bool visitLoadInst(LoadInst &LI) {
     } else if (IntTy && LI.getType()->isIntegerTy()) {
       V = rewriteIntegerLoad(LI);
     } else if (NewBeginOffset == NewAllocaBeginOffset &&
                NewEndOffset == NewAllocaEndOffset &&
                (canConvertValue(DL, NewAllocaTy, TargetTy) ||
                 (IsLoadPastEnd && NewAllocaTy->isIntegerTy() &&
                  TargetTy->isIntegerTy()))) {
       LoadInst *NewLI = IRB.CreateAlignedLoad(NewAI.getAllocatedType(), &NewAI,
-                                              NewAI.getAlignment(),
-                                              LI.isVolatile(), LI.getName());
+                                              NewAI.getAlign(), LI.isVolatile(),
+                                              LI.getName());
       if (AATags)
         NewLI->setAAMetadata(AATags);
       if (LI.isVolatile())
         NewLI->setAtomic(LI.getOrdering(), LI.getSyncScopeID());
 
       // Any !nonnull metadata or !range metadata on the old load is also valid
       // on the new load. This is even true in some cases even when the loads
       // are different types, for example by mapping !nonnull metadata to
if (V->getType() != VecTy) {
       Type *SliceTy = (NumElements == 1)
                           ? ElementTy
                           : VectorType::get(ElementTy, NumElements);
       if (V->getType() != SliceTy)
         V = convertValue(DL, IRB, V, SliceTy);
 
       // Mix in the existing elements.
       Value *Old = IRB.CreateAlignedLoad(NewAI.getAllocatedType(), &NewAI,
-                                         NewAI.getAlignment(), "load");
+                                         NewAI.getAlign(), "load");
       V = insertVector(IRB, Old, V, BeginIndex, "vec");
     }
     StoreInst *Store = IRB.CreateAlignedStore(V, &NewAI, NewAI.getAlignment());
     if (AATags)
       Store->setAAMetadata(AATags);
     Pass.DeadInsts.insert(&SI);
 
     LLVM_DEBUG(dbgs() << "          to: " << *Store << "\n");
     return true;
   }
 
   bool rewriteIntegerStore(Value *V, StoreInst &SI, AAMDNodes AATags) {
     assert(IntTy && "We cannot extract an integer from the alloca");
     assert(!SI.isVolatile());
     if (DL.getTypeSizeInBits(V->getType()) != IntTy->getBitWidth()) {
       Value *Old = IRB.CreateAlignedLoad(NewAI.getAllocatedType(), &NewAI,
-                                         NewAI.getAlignment(), "oldload");
+                                         NewAI.getAlign(), "oldload");
       Old = convertValue(DL, IRB, Old, IntTy);
       assert(BeginOffset >= NewAllocaBeginOffset && "Out of bounds offset");
       uint64_t Offset = BeginOffset - NewAllocaBeginOffset;
       V = insertInteger(DL, IRB, Old, SI.getValueOperand(), Offset, "insert");
     }
     V = convertValue(DL, IRB, V, NewAllocaTy);
     StoreInst *Store = IRB.CreateAlignedStore(V, &NewAI, NewAI.getAlignment());
     Store->copyMetadata(SI, {LLVMContext::MD_mem_parallel_loop_access,
if (VecTy) {
 
       Value *Splat =
           getIntegerSplat(II.getValue(), DL.getTypeSizeInBits(ElementTy) / 8);
       Splat = convertValue(DL, IRB, Splat, ElementTy);
       if (NumElements > 1)
         Splat = getVectorSplat(Splat, NumElements);
 
       Value *Old = IRB.CreateAlignedLoad(NewAI.getAllocatedType(), &NewAI,
-                                         NewAI.getAlignment(), "oldload");
+                                         NewAI.getAlign(), "oldload");
       V = insertVector(IRB, Old, Splat, BeginIndex, "vec");
     } else if (IntTy) {
       // If this is a memset on an alloca where we can widen stores, insert the
       // set integer.
       assert(!II.isVolatile());
 
       uint64_t Size = NewEndOffset - NewBeginOffset;
       V = getIntegerSplat(II.getValue(), Size);
 
       if (IntTy && (BeginOffset != NewAllocaBeginOffset ||
                     EndOffset != NewAllocaBeginOffset)) {
         Value *Old = IRB.CreateAlignedLoad(NewAI.getAllocatedType(), &NewAI,
-                                           NewAI.getAlignment(), "oldload");
+                                           NewAI.getAlign(), "oldload");
         Old = convertValue(DL, IRB, Old, IntTy);
         uint64_t Offset = NewBeginOffset - NewAllocaBeginOffset;
         V = insertInteger(DL, IRB, Old, V, Offset, "insert");
       } else {
         assert(V->getType() == IntTy &&
                "Wrong type for an alloca wide integer!");
       }
       V = convertValue(DL, IRB, V, AllocaTy);
bool visitMemTransferInst(MemTransferInst &II) {
     if (!IsDest) {
       std::swap(SrcPtr, DstPtr);
       std::swap(SrcAlign, DstAlign);
     }
 
     Value *Src;
     if (VecTy && !IsWholeAlloca && !IsDest) {
       Src = IRB.CreateAlignedLoad(NewAI.getAllocatedType(), &NewAI,
-                                  NewAI.getAlignment(), "load");
+                                  NewAI.getAlign(), "load");
       Src = extractVector(IRB, Src, BeginIndex, EndIndex, "vec");
     } else if (IntTy && !IsWholeAlloca && !IsDest) {
       Src = IRB.CreateAlignedLoad(NewAI.getAllocatedType(), &NewAI,
-                                  NewAI.getAlignment(), "load");
+                                  NewAI.getAlign(), "load");
       Src = convertValue(DL, IRB, Src, IntTy);
       uint64_t Offset = NewBeginOffset - NewAllocaBeginOffset;
       Src = extractInteger(DL, IRB, Src, SubIntTy, Offset, "extract");
     } else {
       LoadInst *Load = IRB.CreateAlignedLoad(OtherTy, SrcPtr, SrcAlign,
                                              II.isVolatile(), "copyload");
       if (AATags)
         Load->setAAMetadata(AATags);
       Src = Load;
     }
 
     if (VecTy && !IsWholeAlloca && IsDest) {
       Value *Old = IRB.CreateAlignedLoad(NewAI.getAllocatedType(), &NewAI,
-                                         NewAI.getAlignment(), "oldload");
+                                         NewAI.getAlign(), "oldload");
       Src = insertVector(IRB, Old, Src, BeginIndex, "vec");
     } else if (IntTy && !IsWholeAlloca && IsDest) {
       Value *Old = IRB.CreateAlignedLoad(NewAI.getAllocatedType(), &NewAI,
-                                         NewAI.getAlignment(), "oldload");
+                                         NewAI.getAlign(), "oldload");
       Old = convertValue(DL, IRB, Old, IntTy);
       uint64_t Offset = NewBeginOffset - NewAllocaBeginOffset;
       Src = insertInteger(DL, IRB, Old, Src, Offset, "insert");
       Src = convertValue(DL, IRB, Src, NewAllocaTy);
     }
 
     StoreInst *Store = cast<StoreInst>(
         IRB.CreateAlignedStore(Src, DstPtr, DstAlign, II.isVolatile()));
struct LoadOpSplitter : public OpSplitter<LoadOpSplitter> {
     /// Emit a leaf load of a single value. This is called at the leaves of the
     /// recursive emission to actually load values.
     void emitFunc(Type *Ty, Value *&Agg, Align Alignment, const Twine &Name) {
       assert(Ty->isSingleValueType());
       // Load the single value and insert it using the indices.
       Value *GEP =
           IRB.CreateInBoundsGEP(BaseTy, Ptr, GEPIndices, Name + ".gep");
       LoadInst *Load =
-          IRB.CreateAlignedLoad(Ty, GEP, Alignment.value(), Name + ".load");
+          IRB.CreateAlignedLoad(Ty, GEP, Alignment, Name + ".load");
       if (AATags)
         Load->setAAMetadata(AATags);
       Agg = IRB.CreateInsertValue(Agg, Load, Indices, Name + ".insert");
       LLVM_DEBUG(dbgs() << "          to: " << *Load << "\n");
     }
   };
 
   bool visitLoadInst(LoadInst &LI) {
for (;;) {
       auto *PartTy = Type::getIntNTy(Ty->getContext(), PartSize * 8);
       auto AS = LI->getPointerAddressSpace();
       auto *PartPtrTy = PartTy->getPointerTo(AS);
       LoadInst *PLoad = IRB.CreateAlignedLoad(
           PartTy,
           getAdjustedPtr(IRB, DL, BasePtr,
                          APInt(DL.getIndexSizeInBits(AS), PartOffset),
                          PartPtrTy, BasePtr->getName() + "."),
-          getAdjustedAlignment(LI, PartOffset, DL).value(),
+          getAdjustedAlignment(LI, PartOffset, DL),
           /*IsVolatile*/ false, LI->getName());
       PLoad->copyMetadata(*LI, {LLVMContext::MD_mem_parallel_loop_access,
                                 LLVMContext::MD_access_group});
 
       // Append this load onto the list of split loads so we can find it later
       // to rewrite the stores.
       SplitLoads.push_back(PLoad);
 
for (;;) {
       } else {
         IRB.SetInsertPoint(LI);
         auto AS = LI->getPointerAddressSpace();
         PLoad = IRB.CreateAlignedLoad(
             PartTy,
             getAdjustedPtr(IRB, DL, LoadBasePtr,
                            APInt(DL.getIndexSizeInBits(AS), PartOffset),
                            LoadPartPtrTy, LoadBasePtr->getName() + "."),
-            getAdjustedAlignment(LI, PartOffset, DL).value(),
+            getAdjustedAlignment(LI, PartOffset, DL),
             /*IsVolatile*/ false, LI->getName());
       }
 
       // And store this partition.
       IRB.SetInsertPoint(SI);
       auto AS = SI->getPointerAddressSpace();
       StoreInst *PStore = IRB.CreateAlignedStore(
           PLoad,

llvm/lib/Transforms/Scalar/Scalarizer.cpp

bool ScalarizerVisitor::visitLoadInst(LoadInst &LI) {
   unsigned NumElems = Layout.VecTy->getNumElements();
   IRBuilder<> Builder(&LI);
   Scatterer Ptr = scatter(&LI, LI.getPointerOperand());
   ValueVector Res;
   Res.resize(NumElems);
 
   for (unsigned I = 0; I < NumElems; ++I)
     Res[I] = Builder.CreateAlignedLoad(Layout.VecTy->getElementType(), Ptr[I],
-                                       Layout.getElemAlign(I),
+                                       Align(Layout.getElemAlign(I)),
                                        LI.getName() + ".i" + Twine(I));
   gather(&LI, Res);
   return true;
 }
 
 bool ScalarizerVisitor::visitStoreInst(StoreInst &SI) {
   if (!ScalarizeLoadStore)
     return false;

llvm/lib/Transforms/Vectorize/LoadStoreVectorizer.cpp

bool Vectorizer::vectorizeLoadChain(
   // Last may have changed since then, but the value of First won't have.  If it
   // matters, we could compute getBoundaryInstrs only once and reuse it here.
   BasicBlock::iterator First, Last;
   std::tie(First, Last) = getBoundaryInstrs(Chain);
   Builder.SetInsertPoint(&*First);
 
   Value *Bitcast =
       Builder.CreateBitCast(L0->getPointerOperand(), VecTy->getPointerTo(AS));
-  LoadInst *LI = Builder.CreateAlignedLoad(VecTy, Bitcast, Alignment);
+  LoadInst *LI =
+      Builder.CreateAlignedLoad(VecTy, Bitcast, MaybeAlign(Alignment));
   propagateMetadata(LI, Chain);
 
   if (VecLoadTy) {
     SmallVector<Instruction *, 16> InstrsToErase;
 
     unsigned VecWidth = VecLoadTy->getNumElements();
     for (unsigned I = 0, E = Chain.size(); I != E; ++I) {
       for (auto Use : Chain[I]->users()) {

llvm/lib/Transforms/Vectorize/LoopVectorize.cpp

for (unsigned Part = 0; Part < UF; Part++) {
                           : ShuffledMask;
         }
         NewLoad =
             Builder.CreateMaskedLoad(AddrParts[Part], Group->getAlign(),
                                      GroupMask, UndefVec, "wide.masked.vec");
       }
       else
         NewLoad = Builder.CreateAlignedLoad(VecTy, AddrParts[Part],
-                                            Group->getAlignment(), "wide.vec");
+                                            Group->getAlign(), "wide.vec");
       Group->addMetadata(NewLoad);
       NewLoads.push_back(NewLoad);
     }
 
     // For each member in the group, shuffle out the appropriate data from the
     // wide loads.
     for (unsigned I = 0; I < InterleaveFactor; ++I) {
       Instruction *Member = Group->getMember(I);
if (CreateGatherScatter) {
       addMetadata(NewLI, LI);
     } else {
       auto *VecPtr = CreateVecPtr(Part, State.get(Addr, {0, 0}));
       if (isMaskRequired)
         NewLI = Builder.CreateMaskedLoad(
             VecPtr, Alignment, BlockInMaskParts[Part], UndefValue::get(DataTy),
             "wide.masked.load");
       else
-        NewLI = Builder.CreateAlignedLoad(DataTy, VecPtr, Alignment.value(),
-                                          "wide.load");
+        NewLI =
+            Builder.CreateAlignedLoad(DataTy, VecPtr, Alignment, "wide.load");
 
       // Add metadata to the load, but setVectorValue to the reverse shuffle.
       addMetadata(NewLI, LI);
       if (Reverse)
         NewLI = reverseVector(NewLI);
     }
     VectorLoopValueMap.setVectorValue(Instr, Part, NewLI);
   }

llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp

case Instruction::ExtractElement: {
       return V;
     }
     case Instruction::ExtractValue: {
       if (E->State == TreeEntry::Vectorize) {
         LoadInst *LI = cast<LoadInst>(E->getSingleOperand(0));
         Builder.SetInsertPoint(LI);
         PointerType *PtrTy = PointerType::get(VecTy, LI->getPointerAddressSpace());
         Value *Ptr = Builder.CreateBitCast(LI->getOperand(0), PtrTy);
-        LoadInst *V = Builder.CreateAlignedLoad(VecTy, Ptr, LI->getAlignment());
+        LoadInst *V = Builder.CreateAlignedLoad(VecTy, Ptr, LI->getAlign());
         Value *NewV = propagateMetadata(V, E->Scalars);
         if (!E->ReorderIndices.empty()) {
           OrdersType Mask;
           inversePermutation(E->ReorderIndices, Mask);
           NewV = Builder.CreateShuffleVector(NewV, UndefValue::get(VecTy), Mask,
                                              "reorder_shuffle");
         }
         if (NeedToShuffleReuses) {