[opaque pointer types] Pass value type to GetElementPtr creation.

[jyknight]

Summary

This cleans up all GetElementPtr creation in LLVM to explicitly pass a
value type rather than deriving it from the pointer's element-type.

[jyknight]

Oops, I just noticed I accidentally included the API removals into this review, but those are intended to come later in the series, after I finish the needed changes to clang.

I'll remove them from here and re-upload.

[dblaikie]

Sounds good - thanks!

llvm/include/llvm/IR/Constants.h

1153 ↗

(On Diff #183345)

What overload sets are these nullptr+delete versions meant to account for?

[jyknight]

Rebased and removed API changes that weren't supposed to be in here yet.

[jyknight]

llvm/include/llvm/IR/Constants.h

1153 ↗

(On Diff #183345)

This change was not intended to be in this patch (and is now removed).

But it'll be back in a future patch, so I'll explain anyhow. Unlike the other instructions (Load, Call, Invoke), the GEP creation APIs mostly already have a mandatory Type argument -- but unfortunately allow it to be nullptr, in which case it defaults to the pointee type. These overloads (which are copies of all the GEP-creation APIs, with Type* -> nullptr) are to help catch and fix those callers.

llvm/lib/Bitcode/Reader/BitcodeReader.cpp

case bitc::CST_CODE_CE_GEP_WITH_INRANGE_INDEX: { // [ty, flags, n x
       SmallVector<Constant*, 16> Elts;
       while (OpNum != Record.size()) {
         Type *ElTy = getTypeByID(Record[OpNum++]);
         if (!ElTy)
           return error("Invalid record");
         Elts.push_back(ValueList.getConstantFwdRef(Record[OpNum++], ElTy));
       }
 
-      if (PointeeType &&
-          PointeeType !=
-              cast<PointerType>(Elts[0]->getType()->getScalarType())
-                  ->getElementType())
+      if (Elts.size() < 1)
+        return error("Invalid gep with no operands");
+
+      Type *ImplicitPointeeType =
+              ->getElementType();
+      if (!PointeeType)
+        PointeeType = ImplicitPointeeType;
+      else if (PointeeType != ImplicitPointeeType)
         return error("Explicit gep operator type does not match pointee type "
                      "of pointer operand");
 
-      if (Elts.size() < 1)
-        return error("Invalid gep with no operands");
-
       ArrayRef<Constant *> Indices(Elts.begin() + 1, Elts.end());
       V = ConstantExpr::getGetElementPtr(PointeeType, Elts[0], Indices,
                                          InBounds, InRangeIndex);
       break;
     }
     case bitc::CST_CODE_CE_SELECT: {  // CE_SELECT: [opval#, opval#, opval#]
       if (Record.size() < 3)
         return error("Invalid record");

llvm/lib/CodeGen/SafeStack.cpp

BasePointer = cast<Instruction>(IRB.CreateIntToPtr(
                       ConstantInt::get(IntPtrTy, ~uint64_t(FrameAlignment - 1))),
         StackPtrTy));
   }
 
   IRB.SetInsertPoint(BasePointer->getNextNode());
 
   if (StackGuardSlot) {
     unsigned Offset = SSL.getObjectOffset(StackGuardSlot);
-    Value *Off = IRB.CreateGEP(BasePointer, // BasePointer is i8*
+    Value *Off = IRB.CreateGEP(Int8Ty, BasePointer, // BasePointer is i8*
                                ConstantInt::get(Int32Ty, -Offset));
     Value *NewAI =
         IRB.CreateBitCast(Off, StackGuardSlot->getType(), "StackGuardSlot");
 
     // Replace alloc with the new location.
     StackGuardSlot->replaceAllUsesWith(NewAI);
     StackGuardSlot->eraseFromParent();
   }
 
   for (Argument *Arg : ByValArguments) {
     unsigned Offset = SSL.getObjectOffset(Arg);
     unsigned Align = SSL.getObjectAlignment(Arg);
     Type *Ty = Arg->getType()->getPointerElementType();
 
     uint64_t Size = DL.getTypeStoreSize(Ty);
     if (Size == 0)
       Size = 1; // Don't create zero-sized stack objects.
 
-    Value *Off = IRB.CreateGEP(BasePointer, // BasePointer is i8*
+    Value *Off = IRB.CreateGEP(Int8Ty, BasePointer, // BasePointer is i8*
                                ConstantInt::get(Int32Ty, -Offset));
     Value *NewArg = IRB.CreateBitCast(Off, Arg->getType(),
                                      Arg->getName() + ".unsafe-byval");
 
     // Replace alloc with the new location.
     replaceDbgDeclare(Arg, BasePointer, BasePointer->getNextNode(), DIB,
                       DIExpression::NoDeref, -Offset, DIExpression::NoDeref);
     Arg->replaceAllUsesWith(NewArg);
while (!AI->use_empty()) {
 
       Instruction *InsertBefore;
       if (auto *PHI = dyn_cast<PHINode>(User))
         InsertBefore = PHI->getIncomingBlock(U)->getTerminator();
       else
         InsertBefore = User;
 
       IRBuilder<> IRBUser(InsertBefore);
-      Value *Off = IRBUser.CreateGEP(BasePointer, // BasePointer is i8*
+      Value *Off = IRBUser.CreateGEP(Int8Ty, BasePointer, // BasePointer is i8*
                                      ConstantInt::get(Int32Ty, -Offset));
       Value *Replacement = IRBUser.CreateBitCast(Off, AI->getType(), Name);
 
       if (auto *PHI = dyn_cast<PHINode>(User)) {
         // PHI nodes may have multiple incoming edges from the same BB (why??),
         // all must be updated at once with the same incoming value.
         auto *BB = PHI->getIncomingBlock(U);
         for (unsigned I = 0; I < PHI->getNumIncomingValues(); ++I)
Value *SafeStack::moveStaticAllocasToUnsafeStack(
   // expected.
   // FIXME: no need to update BasePointer in leaf functions.
   unsigned FrameSize = alignTo(SSL.getFrameSize(), StackAlignment);
 
   // Update shadow stack pointer in the function epilogue.
   IRB.SetInsertPoint(BasePointer->getNextNode());
 
   Value *StaticTop =
-      IRB.CreateGEP(BasePointer, ConstantInt::get(Int32Ty, -FrameSize),
+      IRB.CreateGEP(Int8Ty, BasePointer, ConstantInt::get(Int32Ty, -FrameSize),
                     "unsafe_stack_static_top");
   IRB.CreateStore(StaticTop, UnsafeStackPtr);
   return StaticTop;
 }
 
 void SafeStack::moveDynamicAllocasToUnsafeStack(
     Function &F, Value *UnsafeStackPtr, AllocaInst *DynamicTop,
     ArrayRef<AllocaInst *> DynamicAllocas) {

llvm/lib/IR/ConstantFold.cpp

 
 Constant *llvm::ConstantFoldGetElementPtr(Type *PointeeTy, Constant *C,
                                           bool InBounds,
                                           Optional<unsigned> InRangeIndex,
                                           ArrayRef<Value *> Idxs) {
   if (Idxs.empty()) return C;
 
   Type *GEPTy = GetElementPtrInst::getGEPReturnType(
-      C, makeArrayRef((Value *const *)Idxs.data(), Idxs.size()));
+      PointeeTy, C, makeArrayRef((Value *const *)Idxs.data(), Idxs.size()));
 
   if (isa<UndefValue>(C))
     return UndefValue::get(GEPTy);
 
   Constant *Idx0 = cast<Constant>(Idxs[0]);
   if (Idxs.size() == 1 && (Idx0->isNullValue() || isa<UndefValue>(Idx0)))
     return GEPTy->isVectorTy() && !C->getType()->isVectorTy()
                ? ConstantVector::getSplat(

llvm/lib/Target/AArch64/AArch64ISelLowering.cpp

bool AArch64TargetLowering::lowerInterleavedLoad(
   // replace.
   DenseMap<ShuffleVectorInst *, SmallVector<Value *, 4>> SubVecs;
 
   for (unsigned LoadCount = 0; LoadCount < NumLoads; ++LoadCount) {
 
     // If we're generating more than one load, compute the base address of
     // subsequent loads as an offset from the previous.
     if (LoadCount > 0)
-      BaseAddr = Builder.CreateConstGEP1_32(
-          BaseAddr, VecTy->getVectorNumElements() * Factor);
+      BaseAddr =
+          Builder.CreateConstGEP1_32(VecTy->getVectorElementType(), BaseAddr,
+                                     VecTy->getVectorNumElements() * Factor);
 
     CallInst *LdN = Builder.CreateCall(
         LdNFunc, Builder.CreateBitCast(BaseAddr, PtrTy), "ldN");
 
     // Extract and store the sub-vectors returned by the load intrinsic.
     for (unsigned i = 0; i < Shuffles.size(); i++) {
       ShuffleVectorInst *SVI = Shuffles[i];
       unsigned Index = Indices[i];
for (unsigned i = 0; i < Factor; i++) {
         Ops.push_back(Builder.CreateShuffleVector(
             Op0, Op1, createSequentialMask(Builder, StartMask, LaneLen, 0)));
       }
     }
 
     // If we generating more than one store, we compute the base address of
     // subsequent stores as an offset from the previous.
     if (StoreCount > 0)
-      BaseAddr = Builder.CreateConstGEP1_32(BaseAddr, LaneLen * Factor);
+      BaseAddr = Builder.CreateConstGEP1_32(SubVecTy->getVectorElementType(),
+                                            BaseAddr, LaneLen * Factor);
 
     Ops.push_back(Builder.CreateBitCast(BaseAddr, PtrTy));
     Builder.CreateCall(StNFunc, Ops);
   }
   return true;
 }
 
 static bool memOpAlign(unsigned DstAlign, unsigned SrcAlign,
bool AArch64TargetLowering::shouldNormalizeToSelectSequence(LLVMContext &,
   return false;
 }
 
 static Value *UseTlsOffset(IRBuilder<> &IRB, unsigned Offset) {
   Module *M = IRB.GetInsertBlock()->getParent()->getParent();
   Function *ThreadPointerFunc =
       Intrinsic::getDeclaration(M, Intrinsic::thread_pointer);
   return IRB.CreatePointerCast(
-      IRB.CreateConstGEP1_32(IRB.CreateCall(ThreadPointerFunc), Offset),
-      Type::getInt8PtrTy(IRB.getContext())->getPointerTo(0));
+      IRB.CreateConstGEP1_32(IRB.getInt8Ty(), IRB.CreateCall(ThreadPointerFunc),
+                             Offset),
+      IRB.getInt8PtrTy()->getPointerTo(0));
 }
 
 Value *AArch64TargetLowering::getIRStackGuard(IRBuilder<> &IRB) const {
   // Android provides a fixed TLS slot for the stack cookie. See the definition
   // of TLS_SLOT_STACK_GUARD in
   // https://android.googlesource.com/platform/bionic/+/master/libc/private/bionic_tls.h
   if (Subtarget->isTargetAndroid())
     return UseTlsOffset(IRB, 0x28);

llvm/lib/Target/AMDGPU/AMDGPULowerKernelArguments.cpp

for (Argument &Arg : F.args()) {
     Type *AdjustedArgTy;
     if (DoShiftOpt) { // FIXME: Handle aggregate types
       // Since we don't have sub-dword scalar loads, avoid doing an extload by
       // loading earlier than the argument address, and extracting the relevant
       // bits.
       //
       // Additionally widen any sub-dword load to i32 even if suitably aligned,
       // so that CSE between different argument loads works easily.
-
       ArgPtr = Builder.CreateConstInBoundsGEP1_64(
-        KernArgSegment,
-        AlignDownOffset,
+          Builder.getInt8Ty(), KernArgSegment, AlignDownOffset,
           Arg.getName() + ".kernarg.offset.align.down");
       AdjustedArgTy = Builder.getInt32Ty();
     } else {
       ArgPtr = Builder.CreateConstInBoundsGEP1_64(
-        KernArgSegment,
-        EltOffset,
+          Builder.getInt8Ty(), KernArgSegment, EltOffset,
           Arg.getName() + ".kernarg.offset");
       AdjustedArgTy = ArgTy;
     }
 
     if (IsV3 && Size >= 32) {
       V4Ty = VectorType::get(VT->getVectorElementType(), 4);
       // Use the hack that clang uses to avoid SelectionDAG ruining v3 loads
       AdjustedArgTy = V4Ty;
     }

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(CastDispatchPtr, 1);
+  Value *GEPXY = Builder.CreateConstInBoundsGEP1_64(I32Ty, CastDispatchPtr, 1);
   LoadInst *LoadXY = Builder.CreateAlignedLoad(I32Ty, GEPXY, 4);
 
-  Value *GEPZU = Builder.CreateConstInBoundsGEP1_64(CastDispatchPtr, 2);
+  Value *GEPZU = Builder.CreateConstInBoundsGEP1_64(I32Ty, CastDispatchPtr, 2);
   LoadInst *LoadZU = Builder.CreateAlignedLoad(I32Ty, GEPZU, 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.

llvm/lib/Target/ARM/ARMISelLowering.cpp

bool ARMTargetLowering::lowerInterleavedLoad(
   // sub-vectors are associated with the shufflevector instructions they will
   // replace.
   DenseMap<ShuffleVectorInst *, SmallVector<Value *, 4>> SubVecs;
 
   for (unsigned LoadCount = 0; LoadCount < NumLoads; ++LoadCount) {
     // If we're generating more than one load, compute the base address of
     // subsequent loads as an offset from the previous.
     if (LoadCount > 0)
-      BaseAddr = Builder.CreateConstGEP1_32(
-          BaseAddr, VecTy->getVectorNumElements() * Factor);
+      BaseAddr =
+          Builder.CreateConstGEP1_32(VecTy->getVectorElementType(), BaseAddr,
+                                     VecTy->getVectorNumElements() * Factor);
 
     SmallVector<Value *, 2> Ops;
     Ops.push_back(Builder.CreateBitCast(BaseAddr, Int8Ptr));
     Ops.push_back(Builder.getInt32(LI->getAlignment()));
 
     CallInst *VldN = Builder.CreateCall(VldnFunc, Ops, "vldN");
 
     // Replace uses of each shufflevector with the corresponding vector loaded
bool ARMTargetLowering::lowerInterleavedStore(StoreInst *SI,
   static const Intrinsic::ID StoreInts[3] = {Intrinsic::arm_neon_vst2,
                                              Intrinsic::arm_neon_vst3,
                                              Intrinsic::arm_neon_vst4};
 
   for (unsigned StoreCount = 0; StoreCount < NumStores; ++StoreCount) {
     // If we generating more than one store, we compute the base address of
     // subsequent stores as an offset from the previous.
     if (StoreCount > 0)
-      BaseAddr = Builder.CreateConstGEP1_32(BaseAddr, LaneLen * Factor);
+      BaseAddr = Builder.CreateConstGEP1_32(SubVecTy->getVectorElementType(),
+                                            BaseAddr, LaneLen * Factor);
 
     SmallVector<Value *, 6> Ops;
     Ops.push_back(Builder.CreateBitCast(BaseAddr, Int8Ptr));
 
     Function *VstNFunc =
         Intrinsic::getDeclaration(SI->getModule(), StoreInts[Factor - 2], Tys);
 
     // Split the shufflevector operands into sub vectors for the new vstN call.

llvm/lib/Target/X86/X86InterleavedAccess.cpp

void X86InterleavedAccessGroup::decompose(
   } else {
     VecBaseTy = SubVecTy;
     VecBasePtrTy = VecBaseTy->getPointerTo(LI->getPointerAddressSpace());
     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(VecBasePtr, Builder.getInt32(i));
+    Value *NewBasePtr =
+        Builder.CreateGEP(VecBaseTy, VecBasePtr, Builder.getInt32(i));
     Instruction *NewLoad =
         Builder.CreateAlignedLoad(VecBaseTy, NewBasePtr, LI->getAlignment());
     DecomposedVectors.push_back(NewLoad);
   }
 }
 
 // Changing the scale of the vector type by reducing the number of elements and
 // doubling the scalar size.

llvm/lib/Target/X86/X86WinEHState.cpp

void WinEHStatePass::addStateStores(Function &F, WinEHFuncInfo &FuncInfo) {
   for (CallSite CS : SetJmp3CallSites) {
     auto &BBColors = BlockColors[CS->getParent()];
     BasicBlock *FuncletEntryBB = BBColors.front();
     bool InCleanup = isa<CleanupPadInst>(FuncletEntryBB->getFirstNonPHI());
 
     IRBuilder<> Builder(CS.getInstruction());
     Value *State;
     if (InCleanup) {
-      Value *StateField =
-          Builder.CreateStructGEP(nullptr, RegNode, StateFieldIndex);
+      Value *StateField = Builder.CreateStructGEP(RegNode->getAllocatedType(),
+                                                  RegNode, StateFieldIndex);
       State = Builder.CreateLoad(Builder.getInt32Ty(), StateField);
     } else {
       State = Builder.getInt32(getStateForCallSite(BlockColors, FuncInfo, CS));
     }
     rewriteSetJmpCallSite(Builder, F, CS, State);
   }
 }
 
 void WinEHStatePass::insertStateNumberStore(Instruction *IP, int State) {
   IRBuilder<> Builder(IP);
-  Value *StateField =
-      Builder.CreateStructGEP(nullptr, RegNode, StateFieldIndex);
+  Value *StateField = Builder.CreateStructGEP(RegNode->getAllocatedType(),
+                                              RegNode, StateFieldIndex);
   Builder.CreateStore(Builder.getInt32(State), StateField);
 }

llvm/lib/Transforms/IPO/GlobalOpt.cpp

if (LoadInst *LI = dyn_cast<LoadInst>(I)) {
       for (User::op_iterator i = GEPI->op_begin() + 1, e = GEPI->op_end();
            i != e; ++i)
         if (Constant *C = dyn_cast<Constant>(*i))
           Idxs.push_back(C);
         else
           break;
       if (Idxs.size() == GEPI->getNumOperands()-1)
         Changed |= OptimizeAwayTrappingUsesOfValue(
-            GEPI, ConstantExpr::getGetElementPtr(nullptr, NewV, Idxs));
+            GEPI, ConstantExpr::getGetElementPtr(GEPI->getSourceElementType(),
+                                                 NewV, Idxs));
       if (GEPI->use_empty()) {
         Changed = true;
         GEPI->eraseFromParent();
       }
     }
   }
 
   return Changed;

llvm/lib/Transforms/InstCombine/InstCombineCasts.cpp

while (SrcElTy != DstElTy &&
            SrcElTy->getNumContainedTypes() /* not "{}" */) {
       SrcElTy = cast<CompositeType>(SrcElTy)->getTypeAtIndex(0U);
       ++NumZeros;
     }
 
     // If we found a path from the src to dest, create the getelementptr now.
     if (SrcElTy == DstElTy) {
       SmallVector<Value *, 8> Idxs(NumZeros + 1, Builder.getInt32(0));
-      return GetElementPtrInst::CreateInBounds(Src, Idxs);
+      return GetElementPtrInst::CreateInBounds(SrcPTy->getElementType(), Src,
+                                               Idxs);
     }
   }
 
   if (VectorType *DestVTy = dyn_cast<VectorType>(DestTy)) {
     if (DestVTy->getNumElements() == 1 && !SrcTy->isVectorTy()) {
       Value *Elem = Builder.CreateBitCast(Src, DestVTy->getElementType());
       return InsertElementInst::Create(UndefValue::get(DestTy), Elem,
                      Constant::getNullValue(Type::getInt32Ty(CI.getContext())));

llvm/lib/Transforms/InstCombine/InstCombineLoadStoreAlloca.cpp

if (C->getValue().getActiveBits() <= 64) {
         ++It;
 
       // Now that I is pointing to the first non-allocation-inst in the block,
       // insert our getelementptr instruction...
       //
       Type *IdxTy = IC.getDataLayout().getIntPtrType(AI.getType());
       Value *NullIdx = Constant::getNullValue(IdxTy);
       Value *Idx[2] = {NullIdx, NullIdx};
-      Instruction *GEP =
-          GetElementPtrInst::CreateInBounds(New, Idx, New->getName() + ".sub");
+      Instruction *GEP = GetElementPtrInst::CreateInBounds(
+          NewTy, New, Idx, New->getName() + ".sub");
       IC.InsertNewInstBefore(GEP, *It);
 
       // Now make everything use the getelementptr instead of the original
       // allocation.
       return IC.replaceInstUsesWith(AI, GEP);
     }
   }
 

llvm/lib/Transforms/InstCombine/InstructionCombining.cpp

if (LI && Src->getNumOperands() == 2 && GEP.getNumOperands() == 2 &&
             GEP.setOperand(1, SO1);
             return &GEP;
           } else {
             // Case 1 or 2
             // -- have to recreate %src & %gep
             // put NewSrc at same location as %src
             Builder.SetInsertPoint(cast<Instruction>(PtrOp));
             auto *NewSrc = cast<GetElementPtrInst>(
-                Builder.CreateGEP(SO0, GO1, Src->getName()));
+                Builder.CreateGEP(GEPEltType, SO0, GO1, Src->getName()));
             NewSrc->setIsInBounds(Src->isInBounds());
-            auto *NewGEP = GetElementPtrInst::Create(nullptr, NewSrc, {SO1});
+            auto *NewGEP = GetElementPtrInst::Create(GEPEltType, NewSrc, {SO1});
             NewGEP->setIsInBounds(GEP.isInBounds());
             return NewGEP;
           }
         }
       }
     }
 
     // Note that if our source is a gep chain itself then we wait for that
if (GEPType->isVectorTy())
     return nullptr;
 
   // Handle gep(bitcast x) and gep(gep x, 0, 0, 0).
   Value *StrippedPtr = PtrOp->stripPointerCasts();
   PointerType *StrippedPtrTy = cast<PointerType>(StrippedPtr->getType());
 
   if (StrippedPtr != PtrOp) {
     bool HasZeroPointerIndex = false;
+    Type *StrippedPtrEltTy = StrippedPtrTy->getElementType();
+
     if (auto *C = dyn_cast<ConstantInt>(GEP.getOperand(1)))
       HasZeroPointerIndex = C->isZero();
 
     // Transform: GEP (bitcast [10 x i8]* X to [0 x i8]*), i32 0, ...
     // into     : GEP [10 x i8]* X, i32 0, ...
     //
     // Likewise, transform: GEP (bitcast i8* X to [0 x i8]*), i32 0, ...
     //           into     : GEP i8* X, ...
     //
     // This occurs when the program declares an array extern like "int X[];"
     if (HasZeroPointerIndex) {
       if (auto *CATy = dyn_cast<ArrayType>(GEPEltType)) {
         // GEP (bitcast i8* X to [0 x i8]*), i32 0, ... ?
-        if (CATy->getElementType() == StrippedPtrTy->getElementType()) {
+        if (CATy->getElementType() == StrippedPtrEltTy) {
           // -> GEP i8* X, ...
           SmallVector<Value*, 8> Idx(GEP.idx_begin()+1, GEP.idx_end());
           GetElementPtrInst *Res = GetElementPtrInst::Create(
-              StrippedPtrTy->getElementType(), StrippedPtr, Idx, GEP.getName());
+              StrippedPtrEltTy, StrippedPtr, Idx, GEP.getName());
           Res->setIsInBounds(GEP.isInBounds());
           if (StrippedPtrTy->getAddressSpace() == GEP.getAddressSpace())
             return Res;
           // Insert Res, and create an addrspacecast.
           // e.g.,
           // GEP (addrspacecast i8 addrspace(1)* X to [0 x i8]*), i32 0, ...
           // ->
           // %0 = GEP i8 addrspace(1)* X, ...
           // addrspacecast i8 addrspace(1)* %0 to i8*
           return new AddrSpaceCastInst(Builder.Insert(Res), GEPType);
         }
 
-        if (auto *XATy = dyn_cast<ArrayType>(StrippedPtrTy->getElementType())) {
+        if (auto *XATy = dyn_cast<ArrayType>(StrippedPtrEltTy)) {
           // GEP (bitcast [10 x i8]* X to [0 x i8]*), i32 0, ... ?
           if (CATy->getElementType() == XATy->getElementType()) {
             // -> GEP [10 x i8]* X, i32 0, ...
             // At this point, we know that the cast source type is a pointer
             // to an array of the same type as the destination pointer
             // array.  Because the array type is never stepped over (there
             // is a leading zero) we can fold the cast into this GEP.
             if (StrippedPtrTy->getAddressSpace() == GEP.getAddressSpace()) {
               GEP.setOperand(0, StrippedPtr);
               GEP.setSourceElementType(XATy);
               return &GEP;
             }
             // Cannot replace the base pointer directly because StrippedPtr's
             // address space is different. Instead, create a new GEP followed by
             // an addrspacecast.
             // e.g.,
             // GEP (addrspacecast [10 x i8] addrspace(1)* X to [0 x i8]*),
             //   i32 0, ...
             // ->
             // %0 = GEP [10 x i8] addrspace(1)* X, ...
             // addrspacecast i8 addrspace(1)* %0 to i8*
             SmallVector<Value*, 8> Idx(GEP.idx_begin(), GEP.idx_end());
-            Value *NewGEP = GEP.isInBounds()
-                                ? Builder.CreateInBoundsGEP(
-                                      nullptr, StrippedPtr, Idx, GEP.getName())
-                                : Builder.CreateGEP(nullptr, StrippedPtr, Idx,
-                                                    GEP.getName());
+            Value *NewGEP =
+                GEP.isInBounds()
+                    ? Builder.CreateInBoundsGEP(StrippedPtrEltTy, StrippedPtr,
+                                                Idx, GEP.getName())
+                    : Builder.CreateGEP(StrippedPtrEltTy, StrippedPtr, Idx,
             return new AddrSpaceCastInst(NewGEP, GEPType);
           }
         }
       }
     } else if (GEP.getNumOperands() == 2) {
       // Transform things like:
       // %t = getelementptr i32* bitcast ([2 x i32]* %str to i32*), i32 %V
       // into:  %t1 = getelementptr [2 x i32]* %str, i32 0, i32 %V; bitcast
-      Type *SrcEltTy = StrippedPtrTy->getElementType();
-      if (SrcEltTy->isArrayTy() &&
-          DL.getTypeAllocSize(SrcEltTy->getArrayElementType()) ==
+      if (StrippedPtrEltTy->isArrayTy() &&
+          DL.getTypeAllocSize(StrippedPtrEltTy->getArrayElementType()) ==
               DL.getTypeAllocSize(GEPEltType)) {
         Type *IdxType = DL.getIndexType(GEPType);
         Value *Idx[2] = { Constant::getNullValue(IdxType), GEP.getOperand(1) };
         Value *NewGEP =
             GEP.isInBounds()
-                ? Builder.CreateInBoundsGEP(nullptr, StrippedPtr, Idx,
+                ? Builder.CreateInBoundsGEP(StrippedPtrEltTy, StrippedPtr, Idx,
                                             GEP.getName())
-                : Builder.CreateGEP(nullptr, StrippedPtr, Idx, GEP.getName());
+                : Builder.CreateGEP(StrippedPtrEltTy, StrippedPtr, Idx,
+                                    GEP.getName());
 
         // V and GEP are both pointer types --> BitCast
         return CastInst::CreatePointerBitCastOrAddrSpaceCast(NewGEP, GEPType);
       }
 
       // Transform things like:
       // %V = mul i64 %N, 4
       // %t = getelementptr i8* bitcast (i32* %arr to i8*), i32 %V
       // into:  %t1 = getelementptr i32* %arr, i32 %N; bitcast
-      if (GEPEltType->isSized() && SrcEltTy->isSized()) {
+      if (GEPEltType->isSized() && StrippedPtrEltTy->isSized()) {
         // Check that changing the type amounts to dividing the index by a scale
         // factor.
         uint64_t ResSize = DL.getTypeAllocSize(GEPEltType);
-        uint64_t SrcSize = DL.getTypeAllocSize(SrcEltTy);
+        uint64_t SrcSize = DL.getTypeAllocSize(StrippedPtrEltTy);
         if (ResSize && SrcSize % ResSize == 0) {
           Value *Idx = GEP.getOperand(1);
           unsigned BitWidth = Idx->getType()->getPrimitiveSizeInBits();
           uint64_t Scale = SrcSize / ResSize;
 
           // Earlier transforms ensure that the index has the right type
           // according to Data Layout, which considerably simplifies the
           // logic by eliminating implicit casts.
           assert(Idx->getType() == DL.getIndexType(GEPType) &&
                  "Index type does not match the Data Layout preferences");
 
           bool NSW;
           if (Value *NewIdx = Descale(Idx, APInt(BitWidth, Scale), NSW)) {
             // Successfully decomposed Idx as NewIdx * Scale, form a new GEP.
             // If the multiplication NewIdx * Scale may overflow then the new
             // GEP may not be "inbounds".
             Value *NewGEP =
                 GEP.isInBounds() && NSW
-                    ? Builder.CreateInBoundsGEP(nullptr, StrippedPtr, NewIdx,
-                                                GEP.getName())
-                    : Builder.CreateGEP(nullptr, StrippedPtr, NewIdx,
+                    ? Builder.CreateInBoundsGEP(StrippedPtrEltTy, StrippedPtr,
+                                                NewIdx, GEP.getName())
+                    : Builder.CreateGEP(StrippedPtrEltTy, StrippedPtr, NewIdx,
                                         GEP.getName());
 
             // The NewGEP must be pointer typed, so must the old one -> BitCast
             return CastInst::CreatePointerBitCastOrAddrSpaceCast(NewGEP,
                                                                  GEPType);
           }
         }
       }
 
       // Similarly, transform things like:
       // getelementptr i8* bitcast ([100 x double]* X to i8*), i32 %tmp
       //   (where tmp = 8*tmp2) into:
       // getelementptr [100 x double]* %arr, i32 0, i32 %tmp2; bitcast
-      if (GEPEltType->isSized() && SrcEltTy->isSized() &&
-          SrcEltTy->isArrayTy()) {
+      if (GEPEltType->isSized() && StrippedPtrEltTy->isSized() &&
+          StrippedPtrEltTy->isArrayTy()) {
         // Check that changing to the array element type amounts to dividing the
         // index by a scale factor.
         uint64_t ResSize = DL.getTypeAllocSize(GEPEltType);
         uint64_t ArrayEltSize =
-            DL.getTypeAllocSize(SrcEltTy->getArrayElementType());
+            DL.getTypeAllocSize(StrippedPtrEltTy->getArrayElementType());
         if (ResSize && ArrayEltSize % ResSize == 0) {
           Value *Idx = GEP.getOperand(1);
           unsigned BitWidth = Idx->getType()->getPrimitiveSizeInBits();
           uint64_t Scale = ArrayEltSize / ResSize;
 
           // Earlier transforms ensure that the index has the right type
           // according to the Data Layout, which considerably simplifies
           // the logic by eliminating implicit casts.
           assert(Idx->getType() == DL.getIndexType(GEPType) &&
                  "Index type does not match the Data Layout preferences");
 
           bool NSW;
           if (Value *NewIdx = Descale(Idx, APInt(BitWidth, Scale), NSW)) {
             // Successfully decomposed Idx as NewIdx * Scale, form a new GEP.
             // If the multiplication NewIdx * Scale may overflow then the new
             // GEP may not be "inbounds".
             Type *IndTy = DL.getIndexType(GEPType);
             Value *Off[2] = {Constant::getNullValue(IndTy), NewIdx};
 
-            Value *NewGEP = GEP.isInBounds() && NSW
-                                ? Builder.CreateInBoundsGEP(
-                                      SrcEltTy, StrippedPtr, Off, GEP.getName())
-                                : Builder.CreateGEP(SrcEltTy, StrippedPtr, Off,
-                                                    GEP.getName());
+            Value *NewGEP =
+                GEP.isInBounds() && NSW
+                    ? Builder.CreateInBoundsGEP(StrippedPtrEltTy, StrippedPtr,
+                                                Off, GEP.getName())
+                    : Builder.CreateGEP(StrippedPtrEltTy, StrippedPtr, Off,
             // The NewGEP must be pointer typed, so must the old one -> BitCast
             return CastInst::CreatePointerBitCastOrAddrSpaceCast(NewGEP,
                                                                  GEPType);
           }
         }
       }
     }
   }
if (GEP.getNumOperands() == 3 &&
           areMatchingArrayAndVecTypes(SrcEltType, GEPEltType)))) {
 
       // Create a new GEP here, as using `setOperand()` followed by
       // `setSourceElementType()` won't actually update the type of the
       // existing GEP Value. Causing issues if this Value is accessed when
       // constructing an AddrSpaceCastInst
       Value *NGEP =
           GEP.isInBounds()
-              ? Builder.CreateInBoundsGEP(nullptr, SrcOp, {Ops[1], Ops[2]})
-              : Builder.CreateGEP(nullptr, SrcOp, {Ops[1], Ops[2]});
+              ? Builder.CreateInBoundsGEP(SrcEltType, SrcOp, {Ops[1], Ops[2]})
+              : Builder.CreateGEP(SrcEltType, SrcOp, {Ops[1], Ops[2]});
       NGEP->takeName(&GEP);
 
       // Preserve GEP address space to satisfy users
       if (NGEP->getType()->getPointerAddressSpace() != GEP.getAddressSpace())
         return new AddrSpaceCastInst(NGEP, GEPType);
 
       return replaceInstUsesWith(GEP, NGEP);
     }
if (!isa<BitCastInst>(SrcOp) && GEP.accumulateConstantOffset(DL, Offset)) {
 
       // Otherwise, if the offset is non-zero, we need to find out if there is a
       // field at Offset in 'A's type.  If so, we can pull the cast through the
       // GEP.
       SmallVector<Value*, 8> NewIndices;
       if (FindElementAtOffset(SrcType, Offset.getSExtValue(), NewIndices)) {
         Value *NGEP =
             GEP.isInBounds()
-                ? Builder.CreateInBoundsGEP(nullptr, SrcOp, NewIndices)
-                : Builder.CreateGEP(nullptr, SrcOp, NewIndices);
+                ? Builder.CreateInBoundsGEP(SrcEltType, SrcOp, NewIndices)
+                : Builder.CreateGEP(SrcEltType, SrcOp, NewIndices);
 
         if (NGEP->getType() == GEPType)
           return replaceInstUsesWith(GEP, NGEP);
         NGEP->takeName(&GEP);
 
         if (NGEP->getType()->getPointerAddressSpace() != GEP.getAddressSpace())
           return new AddrSpaceCastInst(NGEP, GEPType);
         return new BitCastInst(NGEP, GEPType);
Value *UnderlyingPtrOp =
             PtrOp->stripAndAccumulateInBoundsConstantOffsets(DL,
                                                              BasePtrOffset);
     if (auto *AI = dyn_cast<AllocaInst>(UnderlyingPtrOp)) {
       if (GEP.accumulateConstantOffset(DL, BasePtrOffset) &&
           BasePtrOffset.isNonNegative()) {
         APInt AllocSize(IdxWidth, DL.getTypeAllocSize(AI->getAllocatedType()));
         if (BasePtrOffset.ule(AllocSize)) {
           return GetElementPtrInst::CreateInBounds(
-              PtrOp, makeArrayRef(Ops).slice(1), GEP.getName());
+              GEP.getSourceElementType(), PtrOp, makeArrayRef(Ops).slice(1),
+              GEP.getName());
         }
       }
     }
   }
 
   return nullptr;
 }
 

llvm/lib/Transforms/Instrumentation/AddressSanitizer.cpp

if (auto *Vector = dyn_cast<ConstantVector>(Mask)) {
       IRBuilder<> IRB(I);
       Value *MaskElem = IRB.CreateExtractElement(Mask, Idx);
       Instruction *ThenTerm = SplitBlockAndInsertIfThen(MaskElem, I, false);
       InsertBefore = ThenTerm;
     }
 
     IRBuilder<> IRB(InsertBefore);
     InstrumentedAddress =
-        IRB.CreateGEP(Addr, {Zero, ConstantInt::get(IntptrTy, Idx)});
+        IRB.CreateGEP(VTy, Addr, {Zero, ConstantInt::get(IntptrTy, Idx)});
     doInstrumentAddress(Pass, I, InsertBefore, InstrumentedAddress, Alignment,
                         Granularity, ElemTypeSize, IsWrite, SizeArgument,
                         UseCalls, Exp);
   }
 }
 
 void AddressSanitizer::instrumentMop(ObjectSizeOffsetVisitor &ObjSizeVis,
                                      Instruction *I, bool UseCalls,

llvm/lib/Transforms/Instrumentation/DataFlowSanitizer.cpp

Value *DFSanFunction::getRetvalTLS() {
 
   IRBuilder<> IRB(&F->getEntryBlock().front());
   return RetvalTLSPtr =
              IRB.CreateCall(DFS.GetRetvalTLSTy, DFS.GetRetvalTLS, {});
 }
 
 Value *DFSanFunction::getArgTLS(unsigned Idx, Instruction *Pos) {
   IRBuilder<> IRB(Pos);
-  return IRB.CreateConstGEP2_64(getArgTLSPtr(), 0, Idx);
+  return IRB.CreateConstGEP2_64(ArrayType::get(DFS.ShadowTy, 64),
+                                getArgTLSPtr(), 0, Idx);
 }
 
 Value *DFSanFunction::getShadow(Value *V) {
   if (!isa<Argument>(V) && !isa<Instruction>(V))
     return DFS.ZeroShadow;
   Value *&Shadow = ValShadowMap[V];
   if (!Shadow) {
     if (Argument *A = dyn_cast<Argument>(V)) {

llvm/lib/Transforms/Instrumentation/GCOVProfiling.cpp

for (auto &F : M->functions()) {
           // The phi node must be at the begin of the BB.
           IRBuilder<> BuilderForPhi(&*BB.begin());
           Type *Int64PtrTy = Type::getInt64PtrTy(*Ctx);
           PHINode *Phi = BuilderForPhi.CreatePHI(Int64PtrTy, EdgeCount);
           for (BasicBlock *Pred : predecessors(&BB)) {
             auto It = EdgeToCounter.find({Pred, &BB});
             assert(It != EdgeToCounter.end());
             const unsigned Edge = It->second;
-            Value *EdgeCounter =
-                BuilderForPhi.CreateConstInBoundsGEP2_64(Counters, 0, Edge);
+            Value *EdgeCounter = BuilderForPhi.CreateConstInBoundsGEP2_64(
+                Counters->getValueType(), Counters, 0, Edge);
             Phi->addIncoming(EdgeCounter, Pred);
           }
 
           // Skip phis, landingpads.
           IRBuilder<> Builder(&*BB.getFirstInsertionPt());
           Value *Count = Builder.CreateLoad(Builder.getInt64Ty(), Phi);
           Count = Builder.CreateAdd(Count, Builder.getInt64(1));
           Builder.CreateStore(Count, Phi);
 
           Instruction *TI = BB.getTerminator();
           if (isa<ReturnInst>(TI)) {
             auto It = EdgeToCounter.find({&BB, nullptr});
             assert(It != EdgeToCounter.end());
             const unsigned Edge = It->second;
-            Value *Counter =
-                Builder.CreateConstInBoundsGEP2_64(Counters, 0, Edge);
+            Value *Counter = Builder.CreateConstInBoundsGEP2_64(
+                Counters->getValueType(), Counters, 0, Edge);
             Value *Count = Builder.CreateLoad(Builder.getInt64Ty(), Counter);
             Count = Builder.CreateAdd(Count, Builder.getInt64(1));
             Builder.CreateStore(Count, Counter);
           }
         }
       }
     }
 
Function *GCOVProfiler::insertCounterWriteout(
   // We always have at least one file, so just branch to the header.
   Builder.CreateBr(FileLoopHeader);
 
   // The index into the files structure is our loop induction variable.
   Builder.SetInsertPoint(FileLoopHeader);
   PHINode *IV =
       Builder.CreatePHI(Builder.getInt32Ty(), /*NumReservedValues*/ 2);
   IV->addIncoming(Builder.getInt32(0), BB);
-  auto *FileInfoPtr =
-      Builder.CreateInBoundsGEP(FileInfoArrayGV, {Builder.getInt32(0), IV});
-  auto *StartFileCallArgsPtr = Builder.CreateStructGEP(FileInfoPtr, 0);
+  auto *FileInfoPtr = Builder.CreateInBoundsGEP(
+      FileInfoArrayTy, FileInfoArrayGV, {Builder.getInt32(0), IV});
+  auto *StartFileCallArgsPtr =
+      Builder.CreateStructGEP(FileInfoTy, FileInfoPtr, 0);
   auto *StartFileCall = Builder.CreateCall(
       StartFile,
       {Builder.CreateLoad(StartFileCallArgsTy->getElementType(0),
-                          Builder.CreateStructGEP(StartFileCallArgsPtr, 0)),
+                          Builder.CreateStructGEP(StartFileCallArgsTy,
+                                                  StartFileCallArgsPtr, 0)),
        Builder.CreateLoad(StartFileCallArgsTy->getElementType(1),
-                          Builder.CreateStructGEP(StartFileCallArgsPtr, 1)),
+                          Builder.CreateStructGEP(StartFileCallArgsTy,
+                                                  StartFileCallArgsPtr, 1)),
        Builder.CreateLoad(StartFileCallArgsTy->getElementType(2),
-                          Builder.CreateStructGEP(StartFileCallArgsPtr, 2))});
+                          Builder.CreateStructGEP(StartFileCallArgsTy,
+                                                  StartFileCallArgsPtr, 2))});
   if (auto AK = TLI->getExtAttrForI32Param(false))
     StartFileCall->addParamAttr(2, AK);
-  auto *NumCounters = Builder.CreateLoad(
-      FileInfoTy->getElementType(1), Builder.CreateStructGEP(FileInfoPtr, 1));
-  auto *EmitFunctionCallArgsArray = Builder.CreateLoad(
-      FileInfoTy->getElementType(2), Builder.CreateStructGEP(FileInfoPtr, 2));
-  auto *EmitArcsCallArgsArray = Builder.CreateLoad(
-      FileInfoTy->getElementType(3), Builder.CreateStructGEP(FileInfoPtr, 3));
+  auto *NumCounters =
+      Builder.CreateLoad(FileInfoTy->getElementType(1),
+                         Builder.CreateStructGEP(FileInfoTy, FileInfoPtr, 1));
+  auto *EmitFunctionCallArgsArray =
+      Builder.CreateLoad(FileInfoTy->getElementType(2),
+                         Builder.CreateStructGEP(FileInfoTy, FileInfoPtr, 2));
+  auto *EmitArcsCallArgsArray =
+      Builder.CreateLoad(FileInfoTy->getElementType(3),
+                         Builder.CreateStructGEP(FileInfoTy, FileInfoPtr, 3));
   auto *EnterCounterLoopCond =
       Builder.CreateICmpSLT(Builder.getInt32(0), NumCounters);
   Builder.CreateCondBr(EnterCounterLoopCond, CounterLoopHeader, FileLoopLatch);
 
   Builder.SetInsertPoint(CounterLoopHeader);
   auto *JV = Builder.CreatePHI(Builder.getInt32Ty(), /*NumReservedValues*/ 2);
   JV->addIncoming(Builder.getInt32(0), FileLoopHeader);
-  auto *EmitFunctionCallArgsPtr =
-      Builder.CreateInBoundsGEP(EmitFunctionCallArgsArray, {JV});
+  auto *EmitFunctionCallArgsPtr = Builder.CreateInBoundsGEP(
+      EmitFunctionCallArgsTy, EmitFunctionCallArgsArray, JV);
   auto *EmitFunctionCall = Builder.CreateCall(
       EmitFunction,
       {Builder.CreateLoad(EmitFunctionCallArgsTy->getElementType(0),
-                          Builder.CreateStructGEP(EmitFunctionCallArgsPtr, 0)),
+                          Builder.CreateStructGEP(EmitFunctionCallArgsTy,
+                                                  EmitFunctionCallArgsPtr, 0)),
        Builder.CreateLoad(EmitFunctionCallArgsTy->getElementType(1),
-                          Builder.CreateStructGEP(EmitFunctionCallArgsPtr, 1)),
+                          Builder.CreateStructGEP(EmitFunctionCallArgsTy,
+                                                  EmitFunctionCallArgsPtr, 1)),
        Builder.CreateLoad(EmitFunctionCallArgsTy->getElementType(2),
-                          Builder.CreateStructGEP(EmitFunctionCallArgsPtr, 2)),
+                          Builder.CreateStructGEP(EmitFunctionCallArgsTy,
+                                                  EmitFunctionCallArgsPtr, 2)),
        Builder.CreateLoad(EmitFunctionCallArgsTy->getElementType(3),
-                          Builder.CreateStructGEP(EmitFunctionCallArgsPtr, 3)),
-       Builder.CreateLoad(
-           EmitFunctionCallArgsTy->getElementType(4),
-           Builder.CreateStructGEP(EmitFunctionCallArgsPtr, 4))});
+                          Builder.CreateStructGEP(EmitFunctionCallArgsTy,
+                                                  EmitFunctionCallArgsPtr, 3)),
+       Builder.CreateLoad(EmitFunctionCallArgsTy->getElementType(4),
+                          Builder.CreateStructGEP(EmitFunctionCallArgsTy,
+                                                  EmitFunctionCallArgsPtr,
+                                                  4))});
   if (auto AK = TLI->getExtAttrForI32Param(false)) {
     EmitFunctionCall->addParamAttr(0, AK);
     EmitFunctionCall->addParamAttr(2, AK);
     EmitFunctionCall->addParamAttr(3, AK);
     EmitFunctionCall->addParamAttr(4, AK);
   }
   auto *EmitArcsCallArgsPtr =
-      Builder.CreateInBoundsGEP(EmitArcsCallArgsArray, {JV});
+      Builder.CreateInBoundsGEP(EmitArcsCallArgsTy, EmitArcsCallArgsArray, JV);
   auto *EmitArcsCall = Builder.CreateCall(
       EmitArcs,
-      {Builder.CreateLoad(EmitArcsCallArgsTy->getElementType(0),
-                          Builder.CreateStructGEP(EmitArcsCallArgsPtr, 0)),
+      {Builder.CreateLoad(
+           EmitArcsCallArgsTy->getElementType(0),
+           Builder.CreateStructGEP(EmitArcsCallArgsTy, EmitArcsCallArgsPtr, 0)),
        Builder.CreateLoad(EmitArcsCallArgsTy->getElementType(1),
-                          Builder.CreateStructGEP(EmitArcsCallArgsPtr, 1))});
+                          Builder.CreateStructGEP(EmitArcsCallArgsTy,
+                                                  EmitArcsCallArgsPtr, 1))});
   if (auto AK = TLI->getExtAttrForI32Param(false))
     EmitArcsCall->addParamAttr(0, AK);
   auto *NextJV = Builder.CreateAdd(JV, Builder.getInt32(1));
   auto *CounterLoopCond = Builder.CreateICmpSLT(NextJV, NumCounters);
   Builder.CreateCondBr(CounterLoopCond, CounterLoopHeader, FileLoopLatch);
   JV->addIncoming(NextJV, CounterLoopHeader);
 
   Builder.SetInsertPoint(FileLoopLatch);

llvm/lib/Transforms/Instrumentation/HWAddressSanitizer.cpp

 Value *HWAddressSanitizer::getHwasanThreadSlotPtr(IRBuilder<> &IRB, Type *Ty) {
   Module *M = IRB.GetInsertBlock()->getParent()->getParent();
   if (TargetTriple.isAArch64() && TargetTriple.isAndroid()) {
     // Android provides a fixed TLS slot for sanitizers. See TLS_SLOT_SANITIZER
     // in Bionic's libc/private/bionic_tls.h.
     Function *ThreadPointerFunc =
         Intrinsic::getDeclaration(M, Intrinsic::thread_pointer);
     Value *SlotPtr = IRB.CreatePointerCast(
-        IRB.CreateConstGEP1_32(IRB.CreateCall(ThreadPointerFunc), 0x30),
+        IRB.CreateConstGEP1_32(IRB.getInt8Ty(),
+                               IRB.CreateCall(ThreadPointerFunc), 0x30),
         Ty->getPointerTo(0));
     return SlotPtr;
   }
   if (ThreadPtrGlobal)
     return ThreadPtrGlobal;
 
 
   return nullptr;

llvm/lib/Transforms/Instrumentation/InstrProfiling.cpp

void InstrProfiling::lowerValueProfileInst(InstrProfValueProfileInst *Ind) {
   Ind->eraseFromParent();
 }
 
 void InstrProfiling::lowerIncrement(InstrProfIncrementInst *Inc) {
   GlobalVariable *Counters = getOrCreateRegionCounters(Inc);
 
   IRBuilder<> Builder(Inc);
   uint64_t Index = Inc->getIndex()->getZExtValue();
-  Value *Addr = Builder.CreateConstInBoundsGEP2_64(Counters, 0, Index);
+  Value *Addr = Builder.CreateConstInBoundsGEP2_64(Counters->getValueType(),
+                                                   Counters, 0, Index);
 
   if (Options.Atomic || AtomicCounterUpdateAll) {
     Builder.CreateAtomicRMW(AtomicRMWInst::Add, Addr, Inc->getStep(),
                             AtomicOrdering::Monotonic);
   } else {
     Value *IncStep = Inc->getStep();
     Value *Load = Builder.CreateLoad(IncStep->getType(), Addr, "pgocount");
     auto *Count = Builder.CreateAdd(Load, Inc->getStep());

llvm/lib/Transforms/Instrumentation/MemorySanitizer.cpp

private:
   /// Run-time helper that records a store (or any event) of an
   /// uninitialized value and returns an updated origin id encoding this info.
   FunctionCallee MsanChainOriginFn;
 
   /// MSan runtime replacements for memmove, memcpy and memset.
   FunctionCallee MemmoveFn, MemcpyFn, MemsetFn;
 
   /// KMSAN callback for task-local function argument shadow.
+  StructType *MsanContextStateTy;
   FunctionCallee MsanGetContextStateFn;
 
   /// Functions for poisoning/unpoisoning local variables
   FunctionCallee MsanPoisonAllocaFn, MsanUnpoisonAllocaFn;
 
   /// Each of the MsanMetadataPtrXxx functions returns a pair of shadow/origin
   /// pointers.
   FunctionCallee MsanMetadataPtrForLoadN, MsanMetadataPtrForStoreN;
void MemorySanitizer::createKernelApi(Module &M) {
   // OriginTLS is unused in the kernel.
   OriginTLS = nullptr;
 
   // __msan_warning() in the kernel takes an origin.
   WarningFn = M.getOrInsertFunction("__msan_warning", IRB.getVoidTy(),
                                     IRB.getInt32Ty());
   // Requests the per-task context state (kmsan_context_state*) from the
   // runtime library.
-  MsanGetContextStateFn = M.getOrInsertFunction(
-      "__msan_get_context_state",
-      PointerType::get(
-          StructType::get(ArrayType::get(IRB.getInt64Ty(), kParamTLSSize / 8),
-                          ArrayType::get(IRB.getInt64Ty(), kRetvalTLSSize / 8),
-                          ArrayType::get(IRB.getInt64Ty(), kParamTLSSize / 8),
-                          ArrayType::get(IRB.getInt64Ty(),
-                                         kParamTLSSize / 8), /* va_arg_origin */
-                          IRB.getInt64Ty(),
-                          ArrayType::get(OriginTy, kParamTLSSize / 4), OriginTy,
-                          OriginTy),
-          0));
+  MsanContextStateTy = StructType::get(
+      ArrayType::get(IRB.getInt64Ty(), kParamTLSSize / 8),
+      ArrayType::get(IRB.getInt64Ty(), kParamTLSSize / 8), /* va_arg_origin */
+      IRB.getInt64Ty(), ArrayType::get(OriginTy, kParamTLSSize / 4), OriginTy,
+      OriginTy);
+  MsanGetContextStateFn = M.getOrInsertFunction(
+      "__msan_get_context_state", PointerType::get(MsanContextStateTy, 0));
 
   Type *RetTy = StructType::get(PointerType::get(IRB.getInt8Ty(), 0),
                                 PointerType::get(IRB.getInt32Ty(), 0));
 
   for (int ind = 0, size = 1; ind < 4; ind++, size <<= 1) {
     std::string name_load =
         "__msan_metadata_ptr_for_load_" + std::to_string(size);
     std::string name_store =
if (Alignment >= IntptrAlignment && IntptrSize > kOriginSize) {
         IRB.CreateAlignedStore(IntptrOrigin, Ptr, CurrentAlignment);
         Ofs += IntptrSize / kOriginSize;
         CurrentAlignment = IntptrAlignment;
       }
     }
 
     for (unsigned i = Ofs; i < (Size + kOriginSize - 1) / kOriginSize; ++i) {
       Value *GEP =
-          i ? IRB.CreateConstGEP1_32(nullptr, OriginPtr, i) : OriginPtr;
+          i ? IRB.CreateConstGEP1_32(MS.OriginTy, OriginPtr, i) : OriginPtr;
       IRB.CreateAlignedStore(Origin, GEP, CurrentAlignment);
       CurrentAlignment = kMinOriginAlignment;
     }
   }
 
   void storeOrigin(IRBuilder<> &IRB, Value *Addr, Value *Shadow, Value *Origin,
                    Value *OriginPtr, unsigned Alignment, bool AsCall) {
     const DataLayout &DL = F.getParent()->getDataLayout();
struct MemorySanitizerVisitor : public InstVisitor<MemorySanitizerVisitor> {
   }
 
   BasicBlock *insertKmsanPrologue(Function &F) {
     BasicBlock *ret =
         SplitBlock(&F.getEntryBlock(), F.getEntryBlock().getFirstNonPHI());
     IRBuilder<> IRB(F.getEntryBlock().getFirstNonPHI());
     Value *ContextState = IRB.CreateCall(MS.MsanGetContextStateFn, {});
     Constant *Zero = IRB.getInt32(0);
-    MS.ParamTLS =
-        IRB.CreateGEP(ContextState, {Zero, IRB.getInt32(0)}, "param_shadow");
-    MS.RetvalTLS =
-        IRB.CreateGEP(ContextState, {Zero, IRB.getInt32(1)}, "retval_shadow");
-    MS.VAArgTLS =
-        IRB.CreateGEP(ContextState, {Zero, IRB.getInt32(2)}, "va_arg_shadow");
-    MS.VAArgOriginTLS =
-        IRB.CreateGEP(ContextState, {Zero, IRB.getInt32(3)}, "va_arg_origin");
-    MS.VAArgOverflowSizeTLS = IRB.CreateGEP(
-        ContextState, {Zero, IRB.getInt32(4)}, "va_arg_overflow_size");
-    MS.ParamOriginTLS =
-        IRB.CreateGEP(ContextState, {Zero, IRB.getInt32(5)}, "param_origin");
+    MS.ParamTLS = IRB.CreateGEP(MS.MsanContextStateTy, ContextState,
+                                {Zero, IRB.getInt32(0)}, "param_shadow");
+    MS.RetvalTLS = IRB.CreateGEP(MS.MsanContextStateTy, ContextState,
+                                 {Zero, IRB.getInt32(1)}, "retval_shadow");
+    MS.VAArgTLS = IRB.CreateGEP(MS.MsanContextStateTy, ContextState,
+                                {Zero, IRB.getInt32(2)}, "va_arg_shadow");
+    MS.VAArgOriginTLS = IRB.CreateGEP(MS.MsanContextStateTy, ContextState,
+                                      {Zero, IRB.getInt32(3)}, "va_arg_origin");
+    MS.VAArgOverflowSizeTLS =
+        IRB.CreateGEP(MS.MsanContextStateTy, ContextState,
+                      {Zero, IRB.getInt32(4)}, "va_arg_overflow_size");
+    MS.ParamOriginTLS = IRB.CreateGEP(MS.MsanContextStateTy, ContextState,
+                                      {Zero, IRB.getInt32(5)}, "param_origin");
     MS.RetvalOriginTLS =
-        IRB.CreateGEP(ContextState, {Zero, IRB.getInt32(6)}, "retval_origin");
+        IRB.CreateGEP(MS.MsanContextStateTy, ContextState,
+                      {Zero, IRB.getInt32(6)}, "retval_origin");
     return ret;
   }
 
   /// Add MemorySanitizer instrumentation to a function.
   bool runOnFunction() {
     // In the presence of unreachable blocks, we may see Phi nodes with
     // incoming nodes from such blocks. Since InstVisitor skips unreachable
     // blocks, such nodes will not have any shadow value associated with them.

llvm/lib/Transforms/Instrumentation/SanitizerCoverage.cpp

SanitizerCoverageModule::CreateSecStartEnd(Module &M, const char *Section,
   IRBuilder<> IRB(M.getContext());
   Value *SecEndPtr = IRB.CreatePointerCast(SecEnd, Ty);
   if (!TargetTriple.isOSBinFormatCOFF())
     return std::make_pair(IRB.CreatePointerCast(SecStart, Ty), SecEndPtr);
 
   // Account for the fact that on windows-msvc __start_* symbols actually
   // point to a uint64_t before the start of the array.
   auto SecStartI8Ptr = IRB.CreatePointerCast(SecStart, Int8PtrTy);
-  auto GEP = IRB.CreateGEP(SecStartI8Ptr,
+  auto GEP = IRB.CreateGEP(Int8Ty, SecStartI8Ptr,
                            ConstantInt::get(IntptrTy, sizeof(uint64_t)));
   return std::make_pair(IRB.CreatePointerCast(GEP, Ty), SecEndPtr);
 }
 
 Function *SanitizerCoverageModule::CreateInitCallsForSections(
     Module &M, const char *InitFunctionName, Type *Ty,
     const char *Section) {
   auto SecStartEnd = CreateSecStartEnd(M, Section, Ty);
auto GuardPtr = IRB.CreateIntToPtr(
         IRB.CreateAdd(IRB.CreatePointerCast(FunctionGuardArray, IntptrTy),
                       ConstantInt::get(IntptrTy, Idx * 4)),
         Int32PtrTy);
     IRB.CreateCall(SanCovTracePCGuard, GuardPtr);
     IRB.CreateCall(EmptyAsm, {}); // Avoids callback merge.
   }
   if (Options.Inline8bitCounters) {
     auto CounterPtr = IRB.CreateGEP(
-        Function8bitCounterArray,
+        Function8bitCounterArray->getValueType(), Function8bitCounterArray,
         {ConstantInt::get(IntptrTy, 0), ConstantInt::get(IntptrTy, Idx)});
     auto Load = IRB.CreateLoad(Int8Ty, CounterPtr);
     auto Inc = IRB.CreateAdd(Load, ConstantInt::get(Int8Ty, 1));
     auto Store = IRB.CreateStore(Inc, CounterPtr);
     SetNoSanitizeMetadata(Load);
     SetNoSanitizeMetadata(Store);
   }
   if (Options.StackDepth && IsEntryBB && !IsLeafFunc) {

llvm/lib/Transforms/Scalar/DeadStoreElimination.cpp

static bool tryToShorten(Instruction *EarlierWrite, int64_t &EarlierOffset,
   EarlierIntrinsic->setLength(TrimmedLength);
 
   EarlierSize = NewLength;
   if (!IsOverwriteEnd) {
     int64_t OffsetMoved = (LaterOffset - EarlierOffset);
     Value *Indices[1] = {
         ConstantInt::get(EarlierWriteLength->getType(), OffsetMoved)};
     GetElementPtrInst *NewDestGEP = GetElementPtrInst::CreateInBounds(
+        EarlierIntrinsic->getRawDest()->getType()->getPointerElementType(),
         EarlierIntrinsic->getRawDest(), Indices, "", EarlierWrite);
     EarlierIntrinsic->setDest(NewDestGEP);
     EarlierOffset = EarlierOffset + OffsetMoved;
   }
   return true;
 }
 
 static bool tryToShortenEnd(Instruction *EarlierWrite,

llvm/lib/Transforms/Scalar/IndVarSimplify.cpp

if (IndVar->getType()->isPointerTy() && !IVCount->getType()->isPointerTy()) {
     // We could handle pointer IVs other than i8*, but we need to compensate for
     // gep index scaling. See canExpandBackedgeTakenCount comments.
     assert(SE->getSizeOfExpr(IntegerType::getInt64Ty(IndVar->getContext()),
                              cast<PointerType>(GEPBase->getType())
                                  ->getElementType())->isOne() &&
            "unit stride pointer IV must be i8*");
 
     IRBuilder<> Builder(L->getLoopPreheader()->getTerminator());
-    return Builder.CreateGEP(nullptr, GEPBase, GEPOffset, "lftr.limit");
+    return Builder.CreateGEP(GEPBase->getType()->getPointerElementType(),
+                             GEPBase, GEPOffset, "lftr.limit");
   } else {
     // In any other case, convert both IVInit and IVCount to integers before
     // comparing. This may result in SCEV expansion of pointers, but in practice
     // SCEV will fold the pointer arithmetic away as such:
     // BECount = (IVEnd - IVInit - 1) => IVLimit = IVInit (postinc).
     //
     // Valid Cases: (1) both integers is most common; (2) both may be pointers
     // for simple memset-style loops.

llvm/lib/Transforms/Scalar/MemCpyOptimizer.cpp

if (DestSize->getType() != SrcSize->getType()) {
     else
       DestSize = Builder.CreateZExt(DestSize, SrcSize->getType());
   }
 
   Value *Ule = Builder.CreateICmpULE(DestSize, SrcSize);
   Value *SizeDiff = Builder.CreateSub(DestSize, SrcSize);
   Value *MemsetLen = Builder.CreateSelect(
       Ule, ConstantInt::getNullValue(DestSize->getType()), SizeDiff);
-  Builder.CreateMemSet(Builder.CreateGEP(Dest, SrcSize), MemSet->getOperand(1),
-                       MemsetLen, Align);
+  Builder.CreateMemSet(
+      Builder.CreateGEP(Dest->getType()->getPointerElementType(), Dest,
+                        SrcSize),
+      MemSet->getOperand(1), MemsetLen, Align);
 
   MD->removeInstruction(MemSet);
   MemSet->eraseFromParent();
   return true;
 }
 
 /// Determine whether the instruction has undefined content for the given Size,
 /// either because it was freshly alloca'd or started its lifetime.

llvm/lib/Transforms/Scalar/NaryReassociate.cpp

NaryReassociatePass::tryReassociateGEPAtIndex(GetElementPtrInst *GEP,
   // NewGEP = &Candidate[RHS * (sizeof(IndexedType) / sizeof(Candidate[0])));
   Type *IntPtrTy = DL->getIntPtrType(GEP->getType());
   if (RHS->getType() != IntPtrTy)
     RHS = Builder.CreateSExtOrTrunc(RHS, IntPtrTy);
   if (IndexedSize != ElementSize) {
     RHS = Builder.CreateMul(
         RHS, ConstantInt::get(IntPtrTy, IndexedSize / ElementSize));
   }
-  GetElementPtrInst *NewGEP =
-      cast<GetElementPtrInst>(Builder.CreateGEP(Candidate, RHS));
+  GetElementPtrInst *NewGEP = cast<GetElementPtrInst>(
+      Builder.CreateGEP(GEP->getResultElementType(), Candidate, RHS));
   NewGEP->setIsInBounds(GEP->isInBounds());
   NewGEP->takeName(GEP);
   return NewGEP;
 }
 
 Instruction *NaryReassociatePass::tryReassociateBinaryOp(BinaryOperator *I) {
   Value *LHS = I->getOperand(0), *RHS = I->getOperand(1);
   // There is no need to reassociate 0.

llvm/lib/Transforms/Scalar/SROA.cpp

static Value *buildGEP(IRBuilderTy &IRB, Value *BasePtr,
   if (Indices.empty())
     return BasePtr;
 
   // A single zero index is a no-op, so check for this and avoid building a GEP
   // in that case.
   if (Indices.size() == 1 && cast<ConstantInt>(Indices.back())->isZero())
     return BasePtr;
 
-  return IRB.CreateInBoundsGEP(nullptr, BasePtr, Indices,
-                               NamePrefix + "sroa_idx");
+  return IRB.CreateInBoundsGEP(BasePtr->getType()->getPointerElementType(),
+                               BasePtr, Indices, NamePrefix + "sroa_idx");
 }
 
 /// Get a natural GEP off of the BasePtr walking through Ty toward
 /// TargetTy without changing the offset of the pointer.
 ///
 /// This routine assumes we've already established a properly offset GEP with
 /// Indices, and arrived at the Ty type. The goal is to continue to GEP with
 /// zero-indices down through type layers until we find one the same as
LoadOpSplitter(Instruction *InsertionPoint, Value *Ptr, Type *BaseTy,
                                      DL), AATags(AATags) {}
 
     /// 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, unsigned Align, const Twine &Name) {
       assert(Ty->isSingleValueType());
       // Load the single value and insert it using the indices.
       Value *GEP =
-          IRB.CreateInBoundsGEP(nullptr, Ptr, GEPIndices, Name + ".gep");
+          IRB.CreateInBoundsGEP(BaseTy, Ptr, GEPIndices, Name + ".gep");
       LoadInst *Load = IRB.CreateAlignedLoad(Ty, GEP, Align, Name + ".load");
       if (AATags)
         Load->setAAMetadata(AATags);
       Agg = IRB.CreateInsertValue(Agg, Load, Indices, Name + ".insert");
       LLVM_DEBUG(dbgs() << "          to: " << *Load << "\n");
     }
   };
 
void emitFunc(Type *Ty, Value *&Agg, unsigned Align, const Twine &Name) {
       assert(Ty->isSingleValueType());
       // Extract the single value and store it using the indices.
       //
       // The gep and extractvalue values are factored out of the CreateStore
       // call to make the output independent of the argument evaluation order.
       Value *ExtractValue =
           IRB.CreateExtractValue(Agg, Indices, Name + ".extract");
       Value *InBoundsGEP =
-          IRB.CreateInBoundsGEP(nullptr, Ptr, GEPIndices, Name + ".gep");
+          IRB.CreateInBoundsGEP(BaseTy, Ptr, GEPIndices, Name + ".gep");
       StoreInst *Store =
           IRB.CreateAlignedStore(ExtractValue, InBoundsGEP, Align);
       if (AATags)
         Store->setAAMetadata(AATags);
       LLVM_DEBUG(dbgs() << "          to: " << *Store << "\n");
     }
   };
 

llvm/lib/Transforms/Scalar/Scalarizer.cpp

 // Return component I, creating a new Value for it if necessary.
 Value *Scatterer::operator[](unsigned I) {
   ValueVector &CV = (CachePtr ? *CachePtr : Tmp);
   // Try to reuse a previous value.
   if (CV[I])
     return CV[I];
   IRBuilder<> Builder(BB, BBI);
   if (PtrTy) {
+    Type *ElTy = PtrTy->getElementType()->getVectorElementType();
     if (!CV[0]) {
-      Type *Ty =
-        PointerType::get(PtrTy->getElementType()->getVectorElementType(),
-                         PtrTy->getAddressSpace());
-      CV[0] = Builder.CreateBitCast(V, Ty, V->getName() + ".i0");
+      Type *NewPtrTy = PointerType::get(ElTy, PtrTy->getAddressSpace());
+      CV[0] = Builder.CreateBitCast(V, NewPtrTy, V->getName() + ".i0");
     }
     if (I != 0)
-      CV[I] = Builder.CreateConstGEP1_32(nullptr, CV[0], I,
+      CV[I] = Builder.CreateConstGEP1_32(ElTy, CV[0], I,
                                          V->getName() + ".i" + Twine(I));
   } else {
     // Search through a chain of InsertElementInsts looking for element I.
     // Record other elements in the cache.  The new V is still suitable
     // for all uncached indices.
     while (true) {
       InsertElementInst *Insert = dyn_cast<InsertElementInst>(V);
       if (!Insert)

llvm/lib/Transforms/Scalar/StraightLineStrengthReduce.cpp

case Candidate::GEP:
         else
           Reduced = Builder.CreateGEP(Builder.getInt8Ty(), Reduced, Bump);
         Reduced = Builder.CreateBitCast(Reduced, C.Ins->getType());
       } else {
         // C = gep Basis, Bump
         // Canonicalize bump to pointer size.
         Bump = Builder.CreateSExtOrTrunc(Bump, IntPtrTy);
         if (InBounds)
-          Reduced = Builder.CreateInBoundsGEP(nullptr, Basis.Ins, Bump);
+          Reduced = Builder.CreateInBoundsGEP(
+              cast<GetElementPtrInst>(Basis.Ins)->getResultElementType(),
+              Basis.Ins, Bump);
         else
-          Reduced = Builder.CreateGEP(nullptr, Basis.Ins, Bump);
+          Reduced = Builder.CreateGEP(
+              cast<GetElementPtrInst>(Basis.Ins)->getResultElementType(),
+              Basis.Ins, Bump);
       }
       break;
     }
   default:
     llvm_unreachable("C.CandidateKind is invalid");
   };
   Reduced->takeName(C.Ins);
   C.Ins->replaceAllUsesWith(Reduced);

llvm/lib/Transforms/Utils/Evaluator.cpp

if (StoreInst *SI = dyn_cast<StoreInst>(CurInst)) {
           // from NewTy to Val's type must be legal.  If it's not, we can try
           // introspecting NewTy to find a legal conversion.
           Constant *NewVal;
           while (!(NewVal = ConstantFoldLoadThroughBitcast(Val, NewTy, DL))) {
             // If NewTy is a struct, we can convert the pointer to the struct
             // into a pointer to its first member.
             // FIXME: This could be extended to support arrays as well.
             if (StructType *STy = dyn_cast<StructType>(NewTy)) {
-              NewTy = STy->getTypeAtIndex(0U);
 
               IntegerType *IdxTy = IntegerType::get(NewTy->getContext(), 32);
               Constant *IdxZero = ConstantInt::get(IdxTy, 0, false);
               Constant * const IdxList[] = {IdxZero, IdxZero};
 
-              Ptr = ConstantExpr::getGetElementPtr(nullptr, Ptr, IdxList);
+              Ptr = ConstantExpr::getGetElementPtr(NewTy, Ptr, IdxList);
               if (auto *FoldedPtr = ConstantFoldConstant(Ptr, DL, TLI))
                 Ptr = FoldedPtr;
+              NewTy = STy->getTypeAtIndex(0U);
 
               // If we can't improve the situation by introspecting NewTy,
               // we have to give up.
             } else {
               LLVM_DEBUG(dbgs() << "Failed to bitcast constant ptr, can not "
                                    "evaluate.\n");
               return false;
             }
           }
 
           Val = NewVal;

llvm/lib/Transforms/Utils/LowerMemIntrinsics.cpp

static void createMemMoveLoop(Instruction *InsertBefore,
   // Copying backwards.
   BasicBlock *LoopBB =
     BasicBlock::Create(F->getContext(), "copy_backwards_loop", F, CopyForwardBB);
   IRBuilder<> LoopBuilder(LoopBB);
   PHINode *LoopPhi = LoopBuilder.CreatePHI(TypeOfCopyLen, 0);
   Value *IndexPtr = LoopBuilder.CreateSub(
       LoopPhi, ConstantInt::get(TypeOfCopyLen, 1), "index_ptr");
   Value *Element = LoopBuilder.CreateLoad(
-      EltTy, LoopBuilder.CreateInBoundsGEP(SrcAddr, IndexPtr), "element");
-  LoopBuilder.CreateStore(Element,
-                          LoopBuilder.CreateInBoundsGEP(DstAddr, IndexPtr));
+      EltTy, LoopBuilder.CreateInBoundsGEP(EltTy, SrcAddr, IndexPtr),
+      "element");
+  LoopBuilder.CreateStore(
+      Element, LoopBuilder.CreateInBoundsGEP(EltTy, DstAddr, IndexPtr));
   LoopBuilder.CreateCondBr(
       LoopBuilder.CreateICmpEQ(IndexPtr, ConstantInt::get(TypeOfCopyLen, 0)),
       ExitBB, LoopBB);
   LoopPhi->addIncoming(IndexPtr, LoopBB);
   LoopPhi->addIncoming(CopyLen, CopyBackwardsBB);
   BranchInst::Create(ExitBB, LoopBB, CompareN, ThenTerm);
   ThenTerm->eraseFromParent();
 
   // Copying forward.
   BasicBlock *FwdLoopBB =
     BasicBlock::Create(F->getContext(), "copy_forward_loop", F, ExitBB);
   IRBuilder<> FwdLoopBuilder(FwdLoopBB);
   PHINode *FwdCopyPhi = FwdLoopBuilder.CreatePHI(TypeOfCopyLen, 0, "index_ptr");
   Value *FwdElement = FwdLoopBuilder.CreateLoad(
-      EltTy, FwdLoopBuilder.CreateInBoundsGEP(SrcAddr, FwdCopyPhi), "element");
+      EltTy, FwdLoopBuilder.CreateInBoundsGEP(EltTy, SrcAddr, FwdCopyPhi),
+      "element");
   FwdLoopBuilder.CreateStore(
-      FwdElement, FwdLoopBuilder.CreateInBoundsGEP(DstAddr, FwdCopyPhi));
+      FwdElement, FwdLoopBuilder.CreateInBoundsGEP(EltTy, DstAddr, FwdCopyPhi));
   Value *FwdIndexPtr = FwdLoopBuilder.CreateAdd(
       FwdCopyPhi, ConstantInt::get(TypeOfCopyLen, 1), "index_increment");
   FwdLoopBuilder.CreateCondBr(FwdLoopBuilder.CreateICmpEQ(FwdIndexPtr, CopyLen),
                               ExitBB, FwdLoopBB);
   FwdCopyPhi->addIncoming(FwdIndexPtr, FwdLoopBB);
   FwdCopyPhi->addIncoming(ConstantInt::get(TypeOfCopyLen, 0), CopyForwardBB);
 
   BranchInst::Create(ExitBB, FwdLoopBB, CompareN, ElseTerm);

llvm/lib/Transforms/Utils/SimplifyLibCalls.cpp

Value *LibCallSimplifier::optimizeStrStr(CallInst *CI, IRBuilder<> &B) {
   if (HasStr1 && HasStr2) {
     size_t Offset = SearchStr.find(ToFindStr);
 
     if (Offset == StringRef::npos) // strstr("foo", "bar") -> null
       return Constant::getNullValue(CI->getType());
 
     // strstr("abcd", "bc") -> gep((char*)"abcd", 1)
     Value *Result = castToCStr(CI->getArgOperand(0), B);
-    Result = B.CreateConstInBoundsGEP1_64(Result, Offset, "strstr");
+    Result =
+        B.CreateConstInBoundsGEP1_64(B.getInt8Ty(), Result, Offset, "strstr");
     return B.CreateBitCast(Result, CI->getType());
   }
 
   // fold strstr(x, "y") -> strchr(x, 'y').
   if (HasStr2 && ToFindStr.size() == 1) {
     Value *StrChr = emitStrChr(CI->getArgOperand(0), ToFindStr[0], B, TLI);
     return StrChr ? B.CreateBitCast(StrChr, CI->getType()) : nullptr;
   }

llvm/lib/Transforms/Vectorize/LoopVectorize.cpp

for (unsigned Part = 0; Part < UF; Part++) {
     // E.g.  a = A[i+1];     // Member of index 1 (Current instruction)
     //       b = A[i];       // Member of index 0
     // Current pointer is pointed to A[i+1], adjust it to A[i].
     //
     // E.g.  A[i+1] = a;     // Member of index 1
     //       A[i]   = b;     // Member of index 0
     //       A[i+2] = c;     // Member of index 2 (Current instruction)
     // Current pointer is pointed to A[i+2], adjust it to A[i].
-    NewPtr = Builder.CreateGEP(NewPtr, Builder.getInt32(-Index));
+    NewPtr = Builder.CreateGEP(ScalarTy, NewPtr, Builder.getInt32(-Index));
     if (InBounds)
       cast<GetElementPtrInst>(NewPtr)->setIsInBounds(true);
 
     // Cast to the vector pointer type.
     NewPtrs.push_back(Builder.CreateBitCast(NewPtr, PtrTy));
   }
 
   setDebugLocFromInst(Builder, Instr);
void InnerLoopVectorizer::vectorizeMemoryInstruction(Instruction *Instr,
   const auto CreateVecPtr = [&](unsigned Part, Value *Ptr) -> Value * {
     // Calculate the pointer for the specific unroll-part.
     GetElementPtrInst *PartPtr = nullptr;
 
     if (Reverse) {
       // If the address is consecutive but reversed, then the
       // wide store needs to start at the last vector element.
       PartPtr = cast<GetElementPtrInst>(
-          Builder.CreateGEP(Ptr, Builder.getInt32(-Part * VF)));
+          Builder.CreateGEP(ScalarDataTy, Ptr, Builder.getInt32(-Part * VF)));
       PartPtr->setIsInBounds(InBounds);
       PartPtr = cast<GetElementPtrInst>(
-          Builder.CreateGEP(PartPtr, Builder.getInt32(1 - VF)));
+          Builder.CreateGEP(ScalarDataTy, PartPtr, Builder.getInt32(1 - VF)));
       PartPtr->setIsInBounds(InBounds);
       if (isMaskRequired) // Reverse of a null all-one mask is a null mask.
         Mask[Part] = reverseVector(Mask[Part]);
     } else {
       PartPtr = cast<GetElementPtrInst>(
-          Builder.CreateGEP(Ptr, Builder.getInt32(Part * VF)));
+          Builder.CreateGEP(ScalarDataTy, Ptr, Builder.getInt32(Part * VF)));
       PartPtr->setIsInBounds(InBounds);
     }
 
     return Builder.CreateBitCast(PartPtr, DataTy->getPointerTo(AddressSpace));
   };
 
   // Handle Stores:
   if (SI) {
case InductionDescriptor::IK_IntInduction: {
     auto *Offset = CreateMul(
         Index, Exp.expandCodeFor(Step, Index->getType(), &*B.GetInsertPoint()));
     return CreateAdd(StartValue, Offset);
   }
   case InductionDescriptor::IK_PtrInduction: {
     assert(isa<SCEVConstant>(Step) &&
            "Expected constant step for pointer induction");
     return B.CreateGEP(
-        nullptr, StartValue,
+        StartValue->getType()->getPointerElementType(), StartValue,
         CreateMul(Index, Exp.expandCodeFor(Step, Index->getType(),
                                            &*B.GetInsertPoint())));
   }
   case InductionDescriptor::IK_FpInduction: {
     assert(Step->getType()->isFloatingPointTy() && "Expected FP Step value");
     auto InductionBinOp = ID.getInductionBinOp();
     assert(InductionBinOp &&
            (InductionBinOp->getOpcode() == Instruction::FAdd ||
if (VF > 1 && OrigLoop->hasLoopInvariantOperands(GEP)) {
           if (OrigLoop->isLoopInvariant(U.get()))
             Indices.push_back(U.get());
           else
             Indices.push_back(getOrCreateVectorValue(U.get(), Part));
         }
 
         // Create the new GEP. Note that this GEP may be a scalar if VF == 1,
         // but it should be a vector, otherwise.
-        auto *NewGEP = GEP->isInBounds()
-                           ? Builder.CreateInBoundsGEP(Ptr, Indices)
-                           : Builder.CreateGEP(Ptr, Indices);
+        auto *NewGEP =
+            GEP->isInBounds()
+                ? Builder.CreateInBoundsGEP(GEP->getSourceElementType(), Ptr,
+                                            Indices)
+                : Builder.CreateGEP(GEP->getSourceElementType(), Ptr, Indices);
         assert((VF == 1 || NewGEP->getType()->isVectorTy()) &&
                "NewGEP is not a pointer vector");
         VectorLoopValueMap.setVectorValue(&I, Part, NewGEP);
         addMetadata(NewGEP, GEP);
       }
     }
 
     break;

llvm/unittests/Analysis/BasicAliasAnalysisTest.cpp

F = Function::Create(
       GlobalValue::ExternalLinkage, "F", &M);
 
   BasicBlock *Entry(BasicBlock::Create(C, "", F));
   B.SetInsertPoint(Entry);
 
   Value *ArbitraryI32 = F->arg_begin();
   AllocaInst *I8 = B.CreateAlloca(B.getInt8Ty(), B.getInt32(2));
   auto *I8AtUncertainOffset =
-      cast<GetElementPtrInst>(B.CreateGEP(I8, ArbitraryI32));
+      cast<GetElementPtrInst>(B.CreateGEP(B.getInt8Ty(), I8, ArbitraryI32));
 
   BasicAAResult &BasicAA = setupAnalyses();
   ASSERT_EQ(BasicAA.alias(
                 MemoryLocation(I8, LocationSize::precise(2)),
                 MemoryLocation(I8AtUncertainOffset, LocationSize::precise(1))),
             AliasResult::PartialAlias);
 
   ASSERT_EQ(BasicAA.alias(
                 MemoryLocation(I8, LocationSize::upperBound(2)),
                 MemoryLocation(I8AtUncertainOffset, LocationSize::precise(1))),
             AliasResult::MayAlias);
 }

llvm/unittests/Analysis/MemorySSATest.cpp

F = Function::Create(
       GlobalValue::ExternalLinkage, "F", &M);
 
   // Make blocks
   BasicBlock *Entry = BasicBlock::Create(C, "entry", F);
 
   B.SetInsertPoint(Entry);
   Value *Foo = &*F->arg_begin();
 
-  Value *Bar = B.CreateGEP(Foo, B.getInt64(1), "bar");
+  Value *Bar = B.CreateGEP(B.getInt8Ty(), Foo, B.getInt64(1), "bar");
 
   B.CreateStore(B.getInt8(0), Foo);
   B.CreateStore(B.getInt8(0), Bar);
 
   auto GetLifetimeIntrinsic = [&](Intrinsic::ID ID) {
     return Intrinsic::getDeclaration(&M, ID, {Foo->getType()});
   };
 

llvm/unittests/Analysis/ScalarEvolutionTest.cpp

TEST_F(ScalarEvolutionsTest, SCEVZeroExtendExprNonIntegral) {
   Builder.SetInsertPoint(L);
   PHINode *Phi = Builder.CreatePHI(T_int64, 2);
   Value *Add = Builder.CreateAdd(Phi, ConstantInt::get(T_int64, 1), "add");
   Builder.CreateCondBr(UndefValue::get(T_int1), L, Post);
   Phi->addIncoming(ConstantInt::get(T_int64, 0), LPh);
   Phi->addIncoming(Add, L);
 
   Builder.SetInsertPoint(Post);
-  Value *GepBase = Builder.CreateGEP(Arg, ConstantInt::get(T_int64, 1));
+  Value *GepBase =
+      Builder.CreateGEP(T_int64, Arg, ConstantInt::get(T_int64, 1));
   Instruction *Ret = Builder.CreateRetVoid();
 
   ScalarEvolution SE = buildSE(*F);
   auto *AddRec =
       SE.getAddRecExpr(SE.getUnknown(GepBase), SE.getConstant(T_int64, 1),
                        LI->getLoopFor(L), SCEV::FlagNUW);
 
   SCEVExpander Exp(SE, NIM.getDataLayout(), "expander");

llvm/unittests/IR/InstructionsTest.cpp

B.SetInsertPoint(OnlyBB);
     ASSERT_TRUE(ShlI->hasNoUnsignedWrap());
     ShlI->dropPoisonGeneratingFlags();
     ASSERT_FALSE(ShlI->hasNoUnsignedWrap());
     ASSERT_FALSE(ShlI->hasNoSignedWrap());
   }
 
   {
     Value *GEPBase = Constant::getNullValue(B.getInt8PtrTy());
-    auto *GI = cast<GetElementPtrInst>(B.CreateInBoundsGEP(GEPBase, {Arg0}));
+    auto *GI = cast<GetElementPtrInst>(
+        B.CreateInBoundsGEP(B.getInt8Ty(), GEPBase, Arg0));
     ASSERT_TRUE(GI->isInBounds());
     GI->dropPoisonGeneratingFlags();
     ASSERT_FALSE(GI->isInBounds());
   }
 }
 
 TEST(InstructionsTest, GEPIndices) {
   LLVMContext Context;