[llvm] 6c7805d - Revert "[NFC][RemoveDIs] Bulk update utilities to insert with iterators"

Jeremy Morse via llvm-commits llvm-commits at lists.llvm.org
Thu Feb 29 08:50:38 PST 2024


Author: Jeremy Morse
Date: 2024-02-29T16:50:22Z
New Revision: 6c7805d5d186a6d1263f90b8033ad85e2d2633d7

URL: https://github.com/llvm/llvm-project/commit/6c7805d5d186a6d1263f90b8033ad85e2d2633d7
DIFF: https://github.com/llvm/llvm-project/commit/6c7805d5d186a6d1263f90b8033ad85e2d2633d7.diff

LOG: Revert "[NFC][RemoveDIs] Bulk update utilities to insert with iterators"

This reverts commit 3fda50d3915b2163a54a37b602be7783a89dd808.

Apparently I've missed a hunk while staging this; will back out for now.

Picked up here: https://lab.llvm.org/buildbot/#/builders/139/builds/60429/steps/6/logs/stdio

Added: 
    

Modified: 
    llvm/include/llvm/IR/Instructions.h
    llvm/include/llvm/Transforms/Utils/Local.h
    llvm/lib/IR/Instructions.cpp
    llvm/lib/Transforms/CFGuard/CFGuard.cpp
    llvm/lib/Transforms/Scalar/Reg2Mem.cpp
    llvm/lib/Transforms/Utils/BasicBlockUtils.cpp
    llvm/lib/Transforms/Utils/BreakCriticalEdges.cpp
    llvm/lib/Transforms/Utils/CallPromotionUtils.cpp
    llvm/lib/Transforms/Utils/CanonicalizeFreezeInLoops.cpp
    llvm/lib/Transforms/Utils/CodeExtractor.cpp
    llvm/lib/Transforms/Utils/DemoteRegToStack.cpp
    llvm/lib/Transforms/Utils/EntryExitInstrumenter.cpp
    llvm/lib/Transforms/Utils/InlineFunction.cpp
    llvm/lib/Transforms/Utils/Local.cpp
    llvm/lib/Transforms/Utils/LoopConstrainer.cpp
    llvm/lib/Transforms/Utils/LoopRotationUtils.cpp
    llvm/lib/Transforms/Utils/LoopSimplify.cpp
    llvm/lib/Transforms/Utils/LoopUnroll.cpp
    llvm/lib/Transforms/Utils/LoopUnrollAndJam.cpp
    llvm/lib/Transforms/Utils/LowerGlobalDtors.cpp
    llvm/lib/Transforms/Utils/LowerInvoke.cpp
    llvm/lib/Transforms/Utils/LowerMemIntrinsics.cpp
    llvm/lib/Transforms/Utils/LowerSwitch.cpp
    llvm/lib/Transforms/Utils/MatrixUtils.cpp
    llvm/lib/Transforms/Utils/MemoryTaggingSupport.cpp
    llvm/lib/Transforms/Utils/SCCPSolver.cpp
    llvm/lib/Transforms/Utils/ScalarEvolutionExpander.cpp
    llvm/lib/Transforms/Utils/SimplifyCFG.cpp
    llvm/lib/Transforms/Utils/SimplifyIndVar.cpp
    llvm/lib/Transforms/Utils/StripGCRelocates.cpp
    llvm/lib/Transforms/Utils/UnifyLoopExits.cpp
    llvm/tools/bugpoint/Miscompilation.cpp

Removed: 
    


################################################################################
diff  --git a/llvm/include/llvm/IR/Instructions.h b/llvm/include/llvm/IR/Instructions.h
index 4e4cf71a349d74..bc357074e5cb21 100644
--- a/llvm/include/llvm/IR/Instructions.h
+++ b/llvm/include/llvm/IR/Instructions.h
@@ -1298,14 +1298,14 @@ class ICmpInst: public CmpInst {
 
   /// Constructor with insert-at-end semantics.
   ICmpInst(
-    BasicBlock *InsertAtEnd, ///< Block to insert into.
+    BasicBlock &InsertAtEnd, ///< Block to insert into.
     Predicate pred,  ///< The predicate to use for the comparison
     Value *LHS,      ///< The left-hand-side of the expression
     Value *RHS,      ///< The right-hand-side of the expression
     const Twine &NameStr = ""  ///< Name of the instruction
   ) : CmpInst(makeCmpResultType(LHS->getType()),
               Instruction::ICmp, pred, LHS, RHS, NameStr,
-              InsertAtEnd) {
+              &InsertAtEnd) {
 #ifndef NDEBUG
   AssertOK();
 #endif
@@ -1481,14 +1481,14 @@ class FCmpInst: public CmpInst {
 
   /// Constructor with insert-at-end semantics.
   FCmpInst(
-    BasicBlock *InsertAtEnd, ///< Block to insert into.
+    BasicBlock &InsertAtEnd, ///< Block to insert into.
     Predicate pred,  ///< The predicate to use for the comparison
     Value *LHS,      ///< The left-hand-side of the expression
     Value *RHS,      ///< The right-hand-side of the expression
     const Twine &NameStr = ""  ///< Name of the instruction
   ) : CmpInst(makeCmpResultType(LHS->getType()),
               Instruction::FCmp, pred, LHS, RHS, NameStr,
-              InsertAtEnd) {
+              &InsertAtEnd) {
     AssertOK();
   }
 

diff  --git a/llvm/include/llvm/Transforms/Utils/Local.h b/llvm/include/llvm/Transforms/Utils/Local.h
index 8dc843d2eaf604..2df3c9049c7d62 100644
--- a/llvm/include/llvm/Transforms/Utils/Local.h
+++ b/llvm/include/llvm/Transforms/Utils/Local.h
@@ -206,12 +206,12 @@ bool FoldBranchToCommonDest(BranchInst *BI, llvm::DomTreeUpdater *DTU = nullptr,
 /// to create a stack slot for X.
 AllocaInst *DemoteRegToStack(Instruction &X,
                              bool VolatileLoads = false,
-                             std::optional<BasicBlock::iterator> AllocaPoint = std::nullopt);
+                             Instruction *AllocaPoint = nullptr);
 
 /// This function takes a virtual register computed by a phi node and replaces
 /// it with a slot in the stack frame, allocated via alloca. The phi node is
 /// deleted and it returns the pointer to the alloca inserted.
-AllocaInst *DemotePHIToStack(PHINode *P, std::optional<BasicBlock::iterator> AllocaPoint = std::nullopt);
+AllocaInst *DemotePHIToStack(PHINode *P, Instruction *AllocaPoint = nullptr);
 
 /// If the specified pointer points to an object that we control, try to modify
 /// the object's alignment to PrefAlign. Returns a minimum known alignment of

diff  --git a/llvm/lib/IR/Instructions.cpp b/llvm/lib/IR/Instructions.cpp
index c55d6cff84ed55..42cdcad78228f6 100644
--- a/llvm/lib/IR/Instructions.cpp
+++ b/llvm/lib/IR/Instructions.cpp
@@ -4608,10 +4608,10 @@ CmpInst *
 CmpInst::Create(OtherOps Op, Predicate predicate, Value *S1, Value *S2,
                 const Twine &Name, BasicBlock *InsertAtEnd) {
   if (Op == Instruction::ICmp) {
-    return new ICmpInst(InsertAtEnd, CmpInst::Predicate(predicate),
+    return new ICmpInst(*InsertAtEnd, CmpInst::Predicate(predicate),
                         S1, S2, Name);
   }
-  return new FCmpInst(InsertAtEnd, CmpInst::Predicate(predicate),
+  return new FCmpInst(*InsertAtEnd, CmpInst::Predicate(predicate),
                       S1, S2, Name);
 }
 

diff  --git a/llvm/lib/Transforms/CFGuard/CFGuard.cpp b/llvm/lib/Transforms/CFGuard/CFGuard.cpp
index 32326b5801031f..4d4306576017be 100644
--- a/llvm/lib/Transforms/CFGuard/CFGuard.cpp
+++ b/llvm/lib/Transforms/CFGuard/CFGuard.cpp
@@ -219,7 +219,7 @@ void CFGuardImpl::insertCFGuardDispatch(CallBase *CB) {
   // Create a copy of the call/invoke instruction and add the new bundle.
   assert((isa<CallInst>(CB) || isa<InvokeInst>(CB)) &&
          "Unknown indirect call type");
-  CallBase *NewCB = CallBase::Create(CB, Bundles, CB->getIterator());
+  CallBase *NewCB = CallBase::Create(CB, Bundles, CB);
 
   // Change the target of the call to be the guard dispatch function.
   NewCB->setCalledOperand(GuardDispatchLoad);

diff  --git a/llvm/lib/Transforms/Scalar/Reg2Mem.cpp b/llvm/lib/Transforms/Scalar/Reg2Mem.cpp
index ebc5075aa36fe8..6c2b3e9bd4a721 100644
--- a/llvm/lib/Transforms/Scalar/Reg2Mem.cpp
+++ b/llvm/lib/Transforms/Scalar/Reg2Mem.cpp
@@ -64,7 +64,7 @@ static bool runPass(Function &F) {
 
   CastInst *AllocaInsertionPoint = new BitCastInst(
       Constant::getNullValue(Type::getInt32Ty(F.getContext())),
-      Type::getInt32Ty(F.getContext()), "reg2mem alloca point", I);
+      Type::getInt32Ty(F.getContext()), "reg2mem alloca point", &*I);
 
   // Find the escaped instructions. But don't create stack slots for
   // allocas in entry block.
@@ -76,7 +76,7 @@ static bool runPass(Function &F) {
   // Demote escaped instructions
   NumRegsDemoted += WorkList.size();
   for (Instruction *I : WorkList)
-    DemoteRegToStack(*I, false, AllocaInsertionPoint->getIterator());
+    DemoteRegToStack(*I, false, AllocaInsertionPoint);
 
   WorkList.clear();
 
@@ -88,7 +88,7 @@ static bool runPass(Function &F) {
   // Demote phi nodes
   NumPhisDemoted += WorkList.size();
   for (Instruction *I : WorkList)
-    DemotePHIToStack(cast<PHINode>(I), AllocaInsertionPoint->getIterator());
+    DemotePHIToStack(cast<PHINode>(I), AllocaInsertionPoint);
 
   return true;
 }

diff  --git a/llvm/lib/Transforms/Utils/BasicBlockUtils.cpp b/llvm/lib/Transforms/Utils/BasicBlockUtils.cpp
index 5aa59acfa6df99..5bb109a04ff178 100644
--- a/llvm/lib/Transforms/Utils/BasicBlockUtils.cpp
+++ b/llvm/lib/Transforms/Utils/BasicBlockUtils.cpp
@@ -1297,7 +1297,7 @@ static void UpdatePHINodes(BasicBlock *OrigBB, BasicBlock *NewBB,
     // PHI.
     // Create the new PHI node, insert it into NewBB at the end of the block
     PHINode *NewPHI =
-        PHINode::Create(PN->getType(), Preds.size(), PN->getName() + ".ph", BI->getIterator());
+        PHINode::Create(PN->getType(), Preds.size(), PN->getName() + ".ph", BI);
 
     // NOTE! This loop walks backwards for a reason! First off, this minimizes
     // the cost of removal if we end up removing a large number of values, and
@@ -1517,7 +1517,7 @@ static void SplitLandingPadPredecessorsImpl(
       assert(!LPad->getType()->isTokenTy() &&
              "Split cannot be applied if LPad is token type. Otherwise an "
              "invalid PHINode of token type would be created.");
-      PHINode *PN = PHINode::Create(LPad->getType(), 2, "lpad.phi", LPad->getIterator());
+      PHINode *PN = PHINode::Create(LPad->getType(), 2, "lpad.phi", LPad);
       PN->addIncoming(Clone1, NewBB1);
       PN->addIncoming(Clone2, NewBB2);
       LPad->replaceAllUsesWith(PN);
@@ -1904,7 +1904,7 @@ static void reconnectPhis(BasicBlock *Out, BasicBlock *GuardBlock,
     auto Phi = cast<PHINode>(I);
     auto NewPhi =
         PHINode::Create(Phi->getType(), Incoming.size(),
-                        Phi->getName() + ".moved", FirstGuardBlock->begin());
+                        Phi->getName() + ".moved", &FirstGuardBlock->front());
     for (auto *In : Incoming) {
       Value *V = UndefValue::get(Phi->getType());
       if (In == Out) {
@@ -2023,7 +2023,7 @@ static void calcPredicateUsingInteger(
       Value *Id1 = ConstantInt::get(Type::getInt32Ty(Context),
                                     std::distance(Outgoing.begin(), Succ1Iter));
       IncomingId = SelectInst::Create(Condition, Id0, Id1, "target.bb.idx",
-                                      In->getTerminator()->getIterator());
+                                      In->getTerminator());
     } else {
       // Get the index of the non-null successor.
       auto SuccIter = Succ0 ? find(Outgoing, Succ0) : find(Outgoing, Succ1);

diff  --git a/llvm/lib/Transforms/Utils/BreakCriticalEdges.cpp b/llvm/lib/Transforms/Utils/BreakCriticalEdges.cpp
index 4606514cbc7175..4a784c11c611d9 100644
--- a/llvm/lib/Transforms/Utils/BreakCriticalEdges.cpp
+++ b/llvm/lib/Transforms/Utils/BreakCriticalEdges.cpp
@@ -420,7 +420,7 @@ bool llvm::SplitIndirectBrCriticalEdges(Function &F,
     // (b) Leave that as the only edge in the "Indirect" PHI.
     // (c) Merge the two in the body block.
     BasicBlock::iterator Indirect = Target->begin(),
-                         End = Target->getFirstNonPHIIt();
+                         End = Target->getFirstNonPHI()->getIterator();
     BasicBlock::iterator Direct = DirectSucc->begin();
     BasicBlock::iterator MergeInsert = BodyBlock->getFirstInsertionPt();
 
@@ -430,7 +430,6 @@ bool llvm::SplitIndirectBrCriticalEdges(Function &F,
     while (Indirect != End) {
       PHINode *DirPHI = cast<PHINode>(Direct);
       PHINode *IndPHI = cast<PHINode>(Indirect);
-      BasicBlock::iterator InsertPt = Indirect;
 
       // Now, clean up - the direct block shouldn't get the indirect value,
       // and vice versa.
@@ -441,7 +440,7 @@ bool llvm::SplitIndirectBrCriticalEdges(Function &F,
       // PHI is erased.
       Indirect++;
 
-      PHINode *NewIndPHI = PHINode::Create(IndPHI->getType(), 1, "ind", InsertPt);
+      PHINode *NewIndPHI = PHINode::Create(IndPHI->getType(), 1, "ind", IndPHI);
       NewIndPHI->addIncoming(IndPHI->getIncomingValueForBlock(IBRPred),
                              IBRPred);
 

diff  --git a/llvm/lib/Transforms/Utils/CallPromotionUtils.cpp b/llvm/lib/Transforms/Utils/CallPromotionUtils.cpp
index 48c33d6c0c8e0e..4e84927f1cfc90 100644
--- a/llvm/lib/Transforms/Utils/CallPromotionUtils.cpp
+++ b/llvm/lib/Transforms/Utils/CallPromotionUtils.cpp
@@ -168,12 +168,12 @@ static void createRetBitCast(CallBase &CB, Type *RetTy, CastInst **RetBitCast) {
 
   // Determine an appropriate location to create the bitcast for the return
   // value. The location depends on if we have a call or invoke instruction.
-  BasicBlock::iterator InsertBefore;
+  Instruction *InsertBefore = nullptr;
   if (auto *Invoke = dyn_cast<InvokeInst>(&CB))
     InsertBefore =
-        SplitEdge(Invoke->getParent(), Invoke->getNormalDest())->begin();
+        &SplitEdge(Invoke->getParent(), Invoke->getNormalDest())->front();
   else
-    InsertBefore = std::next(CB.getIterator());
+    InsertBefore = &*std::next(CB.getIterator());
 
   // Bitcast the return value to the correct type.
   auto *Cast = CastInst::CreateBitOrPointerCast(&CB, RetTy, "", InsertBefore);
@@ -509,7 +509,7 @@ CallBase &llvm::promoteCall(CallBase &CB, Function *Callee,
     Type *FormalTy = CalleeType->getParamType(ArgNo);
     Type *ActualTy = Arg->getType();
     if (FormalTy != ActualTy) {
-      auto *Cast = CastInst::CreateBitOrPointerCast(Arg, FormalTy, "", CB.getIterator());
+      auto *Cast = CastInst::CreateBitOrPointerCast(Arg, FormalTy, "", &CB);
       CB.setArgOperand(ArgNo, Cast);
 
       // Remove any incompatible attributes for the argument.

diff  --git a/llvm/lib/Transforms/Utils/CanonicalizeFreezeInLoops.cpp b/llvm/lib/Transforms/Utils/CanonicalizeFreezeInLoops.cpp
index 40010aee9c1114..282c4456346678 100644
--- a/llvm/lib/Transforms/Utils/CanonicalizeFreezeInLoops.cpp
+++ b/llvm/lib/Transforms/Utils/CanonicalizeFreezeInLoops.cpp
@@ -144,7 +144,7 @@ void CanonicalizeFreezeInLoopsImpl::InsertFreezeAndForgetFromSCEV(Use &U) {
   LLVM_DEBUG(dbgs() << "\tOperand: " << *U.get() << "\n");
 
   U.set(new FreezeInst(ValueToFr, ValueToFr->getName() + ".frozen",
-                       PH->getTerminator()->getIterator()));
+                       PH->getTerminator()));
 
   SE.forgetValue(UserI);
 }

diff  --git a/llvm/lib/Transforms/Utils/CodeExtractor.cpp b/llvm/lib/Transforms/Utils/CodeExtractor.cpp
index 3071ec0c911321..bab065153f3efa 100644
--- a/llvm/lib/Transforms/Utils/CodeExtractor.cpp
+++ b/llvm/lib/Transforms/Utils/CodeExtractor.cpp
@@ -570,7 +570,7 @@ void CodeExtractor::findAllocas(const CodeExtractorAnalysisCache &CEAC,
       LLVMContext &Ctx = M->getContext();
       auto *Int8PtrTy = PointerType::getUnqual(Ctx);
       CastInst *CastI =
-          CastInst::CreatePointerCast(AI, Int8PtrTy, "lt.cast", I->getIterator());
+          CastInst::CreatePointerCast(AI, Int8PtrTy, "lt.cast", I);
       I->replaceUsesOfWith(I->getOperand(1), CastI);
     }
 
@@ -1024,7 +1024,7 @@ Function *CodeExtractor::constructFunction(const ValueSet &inputs,
       Value *Idx[2];
       Idx[0] = Constant::getNullValue(Type::getInt32Ty(header->getContext()));
       Idx[1] = ConstantInt::get(Type::getInt32Ty(header->getContext()), aggIdx);
-      BasicBlock::iterator TI = newFunction->begin()->getTerminator()->getIterator();
+      Instruction *TI = newFunction->begin()->getTerminator();
       GetElementPtrInst *GEP = GetElementPtrInst::Create(
           StructTy, &*AggAI, Idx, "gep_" + inputs[i]->getName(), TI);
       RewriteVal = new LoadInst(StructTy->getElementType(aggIdx), GEP,
@@ -1173,7 +1173,7 @@ CallInst *CodeExtractor::emitCallAndSwitchStatement(Function *newFunction,
       AllocaInst *alloca =
         new AllocaInst(output->getType(), DL.getAllocaAddrSpace(),
                        nullptr, output->getName() + ".loc",
-                       codeReplacer->getParent()->front().begin());
+                       &codeReplacer->getParent()->front().front());
       ReloadOutputs.push_back(alloca);
       params.push_back(alloca);
       ++ScalarOutputArgNo;
@@ -1192,8 +1192,8 @@ CallInst *CodeExtractor::emitCallAndSwitchStatement(Function *newFunction,
     StructArgTy = StructType::get(newFunction->getContext(), ArgTypes);
     Struct = new AllocaInst(
         StructArgTy, DL.getAllocaAddrSpace(), nullptr, "structArg",
-        AllocationBlock ? AllocationBlock->getFirstInsertionPt()
-                        : codeReplacer->getParent()->front().begin());
+        AllocationBlock ? &*AllocationBlock->getFirstInsertionPt()
+                        : &codeReplacer->getParent()->front().front());
 
     if (ArgsInZeroAddressSpace && DL.getAllocaAddrSpace() != 0) {
       auto *StructSpaceCast = new AddrSpaceCastInst(
@@ -1358,8 +1358,9 @@ CallInst *CodeExtractor::emitCallAndSwitchStatement(Function *newFunction,
     else
       InsertPt = std::next(OutI->getIterator());
 
-    assert((InsertPt->getFunction() == newFunction ||
-            Blocks.count(InsertPt->getParent())) &&
+    Instruction *InsertBefore = &*InsertPt;
+    assert((InsertBefore->getFunction() == newFunction ||
+            Blocks.count(InsertBefore->getParent())) &&
            "InsertPt should be in new function");
     if (AggregateArgs && StructValues.contains(outputs[i])) {
       assert(AggOutputArgBegin != newFunction->arg_end() &&
@@ -1370,8 +1371,8 @@ CallInst *CodeExtractor::emitCallAndSwitchStatement(Function *newFunction,
       Idx[1] = ConstantInt::get(Type::getInt32Ty(Context), aggIdx);
       GetElementPtrInst *GEP = GetElementPtrInst::Create(
           StructArgTy, &*AggOutputArgBegin, Idx, "gep_" + outputs[i]->getName(),
-          InsertPt);
-      new StoreInst(outputs[i], GEP, InsertPt);
+          InsertBefore);
+      new StoreInst(outputs[i], GEP, InsertBefore);
       ++aggIdx;
       // Since there should be only one struct argument aggregating
       // all the output values, we shouldn't increment AggOutputArgBegin, which
@@ -1380,7 +1381,7 @@ CallInst *CodeExtractor::emitCallAndSwitchStatement(Function *newFunction,
       assert(ScalarOutputArgBegin != newFunction->arg_end() &&
              "Number of scalar output arguments should match "
              "the number of defined values");
-      new StoreInst(outputs[i], &*ScalarOutputArgBegin, InsertPt);
+      new StoreInst(outputs[i], &*ScalarOutputArgBegin, InsertBefore);
       ++ScalarOutputArgBegin;
     }
   }
@@ -1395,15 +1396,15 @@ CallInst *CodeExtractor::emitCallAndSwitchStatement(Function *newFunction,
 
     // Check if the function should return a value
     if (OldFnRetTy->isVoidTy()) {
-      ReturnInst::Create(Context, nullptr, TheSwitch->getIterator());  // Return void
+      ReturnInst::Create(Context, nullptr, TheSwitch);  // Return void
     } else if (OldFnRetTy == TheSwitch->getCondition()->getType()) {
       // return what we have
-      ReturnInst::Create(Context, TheSwitch->getCondition(), TheSwitch->getIterator());
+      ReturnInst::Create(Context, TheSwitch->getCondition(), TheSwitch);
     } else {
       // Otherwise we must have code extracted an unwind or something, just
       // return whatever we want.
       ReturnInst::Create(Context,
-                         Constant::getNullValue(OldFnRetTy), TheSwitch->getIterator());
+                         Constant::getNullValue(OldFnRetTy), TheSwitch);
     }
 
     TheSwitch->eraseFromParent();
@@ -1411,12 +1412,12 @@ CallInst *CodeExtractor::emitCallAndSwitchStatement(Function *newFunction,
   case 1:
     // Only a single destination, change the switch into an unconditional
     // branch.
-    BranchInst::Create(TheSwitch->getSuccessor(1), TheSwitch->getIterator());
+    BranchInst::Create(TheSwitch->getSuccessor(1), TheSwitch);
     TheSwitch->eraseFromParent();
     break;
   case 2:
     BranchInst::Create(TheSwitch->getSuccessor(1), TheSwitch->getSuccessor(2),
-                       call, TheSwitch->getIterator());
+                       call, TheSwitch);
     TheSwitch->eraseFromParent();
     break;
   default:

diff  --git a/llvm/lib/Transforms/Utils/DemoteRegToStack.cpp b/llvm/lib/Transforms/Utils/DemoteRegToStack.cpp
index b2a88eadd3dee8..c894afee68a27a 100644
--- a/llvm/lib/Transforms/Utils/DemoteRegToStack.cpp
+++ b/llvm/lib/Transforms/Utils/DemoteRegToStack.cpp
@@ -20,7 +20,7 @@ using namespace llvm;
 /// invalidating the SSA information for the value.  It returns the pointer to
 /// the alloca inserted to create a stack slot for I.
 AllocaInst *llvm::DemoteRegToStack(Instruction &I, bool VolatileLoads,
-                                   std::optional<BasicBlock::iterator> AllocaPoint) {
+                                   Instruction *AllocaPoint) {
   if (I.use_empty()) {
     I.eraseFromParent();
     return nullptr;
@@ -33,10 +33,10 @@ AllocaInst *llvm::DemoteRegToStack(Instruction &I, bool VolatileLoads,
   AllocaInst *Slot;
   if (AllocaPoint) {
     Slot = new AllocaInst(I.getType(), DL.getAllocaAddrSpace(), nullptr,
-                          I.getName()+".reg2mem", *AllocaPoint);
+                          I.getName()+".reg2mem", AllocaPoint);
   } else {
     Slot = new AllocaInst(I.getType(), DL.getAllocaAddrSpace(), nullptr,
-                          I.getName() + ".reg2mem", F->getEntryBlock().begin());
+                          I.getName() + ".reg2mem", &F->getEntryBlock().front());
   }
 
   // We cannot demote invoke instructions to the stack if their normal edge
@@ -73,7 +73,7 @@ AllocaInst *llvm::DemoteRegToStack(Instruction &I, bool VolatileLoads,
             // Insert the load into the predecessor block
             V = new LoadInst(I.getType(), Slot, I.getName() + ".reload",
                              VolatileLoads,
-                             PN->getIncomingBlock(i)->getTerminator()->getIterator());
+                             PN->getIncomingBlock(i)->getTerminator());
             Loads[PN->getIncomingBlock(i)] = V;
           }
           PN->setIncomingValue(i, V);
@@ -82,7 +82,7 @@ AllocaInst *llvm::DemoteRegToStack(Instruction &I, bool VolatileLoads,
     } else {
       // If this is a normal instruction, just insert a load.
       Value *V = new LoadInst(I.getType(), Slot, I.getName() + ".reload",
-                              VolatileLoads, U->getIterator());
+                              VolatileLoads, U);
       U->replaceUsesOfWith(&I, V);
     }
   }
@@ -99,7 +99,7 @@ AllocaInst *llvm::DemoteRegToStack(Instruction &I, bool VolatileLoads,
         break;
     if (isa<CatchSwitchInst>(InsertPt)) {
       for (BasicBlock *Handler : successors(&*InsertPt))
-        new StoreInst(&I, Slot, Handler->getFirstInsertionPt());
+        new StoreInst(&I, Slot, &*Handler->getFirstInsertionPt());
       return Slot;
     }
   } else {
@@ -107,14 +107,14 @@ AllocaInst *llvm::DemoteRegToStack(Instruction &I, bool VolatileLoads,
     InsertPt = II.getNormalDest()->getFirstInsertionPt();
   }
 
-  new StoreInst(&I, Slot, InsertPt);
+  new StoreInst(&I, Slot, &*InsertPt);
   return Slot;
 }
 
 /// DemotePHIToStack - This function takes a virtual register computed by a PHI
 /// node and replaces it with a slot in the stack frame allocated via alloca.
 /// The PHI node is deleted. It returns the pointer to the alloca inserted.
-AllocaInst *llvm::DemotePHIToStack(PHINode *P, std::optional<BasicBlock::iterator> AllocaPoint) {
+AllocaInst *llvm::DemotePHIToStack(PHINode *P, Instruction *AllocaPoint) {
   if (P->use_empty()) {
     P->eraseFromParent();
     return nullptr;
@@ -126,12 +126,12 @@ AllocaInst *llvm::DemotePHIToStack(PHINode *P, std::optional<BasicBlock::iterato
   AllocaInst *Slot;
   if (AllocaPoint) {
     Slot = new AllocaInst(P->getType(), DL.getAllocaAddrSpace(), nullptr,
-                          P->getName()+".reg2mem", *AllocaPoint);
+                          P->getName()+".reg2mem", AllocaPoint);
   } else {
     Function *F = P->getParent()->getParent();
     Slot = new AllocaInst(P->getType(), DL.getAllocaAddrSpace(), nullptr,
                           P->getName() + ".reg2mem",
-                          F->getEntryBlock().begin());
+                          &F->getEntryBlock().front());
   }
 
   // Iterate over each operand inserting a store in each predecessor.
@@ -141,7 +141,7 @@ AllocaInst *llvm::DemotePHIToStack(PHINode *P, std::optional<BasicBlock::iterato
              "Invoke edge not supported yet"); (void)II;
     }
     new StoreInst(P->getIncomingValue(i), Slot,
-                  P->getIncomingBlock(i)->getTerminator()->getIterator());
+                  P->getIncomingBlock(i)->getTerminator());
   }
 
   // Insert a load in place of the PHI and replace all uses.
@@ -159,12 +159,12 @@ AllocaInst *llvm::DemotePHIToStack(PHINode *P, std::optional<BasicBlock::iterato
     }
     for (Instruction *User : Users) {
       Value *V =
-          new LoadInst(P->getType(), Slot, P->getName() + ".reload", User->getIterator());
+          new LoadInst(P->getType(), Slot, P->getName() + ".reload", User);
       User->replaceUsesOfWith(P, V);
     }
   } else {
     Value *V =
-        new LoadInst(P->getType(), Slot, P->getName() + ".reload", InsertPt);
+        new LoadInst(P->getType(), Slot, P->getName() + ".reload", &*InsertPt);
     P->replaceAllUsesWith(V);
   }
   // Delete PHI.

diff  --git a/llvm/lib/Transforms/Utils/EntryExitInstrumenter.cpp b/llvm/lib/Transforms/Utils/EntryExitInstrumenter.cpp
index f4207474e9a68a..092f1799755d17 100644
--- a/llvm/lib/Transforms/Utils/EntryExitInstrumenter.cpp
+++ b/llvm/lib/Transforms/Utils/EntryExitInstrumenter.cpp
@@ -20,7 +20,7 @@
 using namespace llvm;
 
 static void insertCall(Function &CurFn, StringRef Func,
-                       BasicBlock::iterator InsertionPt, DebugLoc DL) {
+                       Instruction *InsertionPt, DebugLoc DL) {
   Module &M = *InsertionPt->getParent()->getParent()->getParent();
   LLVMContext &C = InsertionPt->getParent()->getContext();
 
@@ -105,7 +105,7 @@ static bool runOnFunction(Function &F, bool PostInlining) {
     if (auto SP = F.getSubprogram())
       DL = DILocation::get(SP->getContext(), SP->getScopeLine(), 0, SP);
 
-    insertCall(F, EntryFunc, F.begin()->getFirstInsertionPt(), DL);
+    insertCall(F, EntryFunc, &*F.begin()->getFirstInsertionPt(), DL);
     Changed = true;
     F.removeFnAttr(EntryAttr);
   }
@@ -126,7 +126,7 @@ static bool runOnFunction(Function &F, bool PostInlining) {
       else if (auto SP = F.getSubprogram())
         DL = DILocation::get(SP->getContext(), 0, 0, SP);
 
-      insertCall(F, ExitFunc, T->getIterator(), DL);
+      insertCall(F, ExitFunc, T, DL);
       Changed = true;
     }
     F.removeFnAttr(ExitAttr);

diff  --git a/llvm/lib/Transforms/Utils/InlineFunction.cpp b/llvm/lib/Transforms/Utils/InlineFunction.cpp
index 0e8e72678de613..f68fdb26f28173 100644
--- a/llvm/lib/Transforms/Utils/InlineFunction.cpp
+++ b/llvm/lib/Transforms/Utils/InlineFunction.cpp
@@ -689,7 +689,7 @@ static void HandleInlinedEHPad(InvokeInst *II, BasicBlock *FirstNewBlock,
     if (auto *CRI = dyn_cast<CleanupReturnInst>(BB->getTerminator())) {
       if (CRI->unwindsToCaller()) {
         auto *CleanupPad = CRI->getCleanupPad();
-        CleanupReturnInst::Create(CleanupPad, UnwindDest, CRI->getIterator());
+        CleanupReturnInst::Create(CleanupPad, UnwindDest, CRI);
         CRI->eraseFromParent();
         UpdatePHINodes(&*BB);
         // Finding a cleanupret with an unwind destination would confuse
@@ -737,7 +737,7 @@ static void HandleInlinedEHPad(InvokeInst *II, BasicBlock *FirstNewBlock,
         auto *NewCatchSwitch = CatchSwitchInst::Create(
             CatchSwitch->getParentPad(), UnwindDest,
             CatchSwitch->getNumHandlers(), CatchSwitch->getName(),
-            CatchSwitch->getIterator());
+            CatchSwitch);
         for (BasicBlock *PadBB : CatchSwitch->handlers())
           NewCatchSwitch->addHandler(PadBB);
         // Propagate info for the old catchswitch over to the new one in
@@ -972,7 +972,7 @@ static void PropagateOperandBundles(Function::iterator InlinedBB,
     I->getOperandBundlesAsDefs(OpBundles);
     OpBundles.emplace_back("funclet", CallSiteEHPad);
 
-    Instruction *NewInst = CallBase::Create(I, OpBundles, I->getIterator());
+    Instruction *NewInst = CallBase::Create(I, OpBundles, I);
     NewInst->takeName(I);
     I->replaceAllUsesWith(NewInst);
     I->eraseFromParent();
@@ -2002,7 +2002,7 @@ inlineRetainOrClaimRVCalls(CallBase &CB, objcarc::ARCInstKind RVCallKind,
       Value *BundleArgs[] = {*objcarc::getAttachedARCFunction(&CB)};
       OperandBundleDef OB("clang.arc.attachedcall", BundleArgs);
       auto *NewCall = CallBase::addOperandBundle(
-          CI, LLVMContext::OB_clang_arc_attachedcall, OB, CI->getIterator());
+          CI, LLVMContext::OB_clang_arc_attachedcall, OB, CI);
       NewCall->copyMetadata(*CI);
       CI->replaceAllUsesWith(NewCall);
       CI->eraseFromParent();
@@ -2326,7 +2326,7 @@ llvm::InlineResult llvm::InlineFunction(CallBase &CB, InlineFunctionInfo &IFI,
           OpDefs.emplace_back("deopt", std::move(MergedDeoptArgs));
         }
 
-        Instruction *NewI = CallBase::Create(ICS, OpDefs, ICS->getIterator());
+        Instruction *NewI = CallBase::Create(ICS, OpDefs, ICS);
 
         // Note: the RAUW does the appropriate fixup in VMap, so we need to do
         // this even if the call returns void.
@@ -2479,7 +2479,7 @@ llvm::InlineResult llvm::InlineFunction(CallBase &CB, InlineFunctionInfo &IFI,
           SmallVector<Value *, 6> Params(CI->args());
           Params.append(VarArgsToForward.begin(), VarArgsToForward.end());
           CallInst *NewCI = CallInst::Create(
-              CI->getFunctionType(), CI->getCalledOperand(), Params, "", CI->getIterator());
+              CI->getFunctionType(), CI->getCalledOperand(), Params, "", CI);
           NewCI->setDebugLoc(CI->getDebugLoc());
           NewCI->setAttributes(Attrs);
           NewCI->setCallingConv(CI->getCallingConv());
@@ -2776,7 +2776,7 @@ llvm::InlineResult llvm::InlineFunction(CallBase &CB, InlineFunctionInfo &IFI,
     // If the call site was an invoke instruction, add a branch to the normal
     // destination.
     if (InvokeInst *II = dyn_cast<InvokeInst>(&CB)) {
-      BranchInst *NewBr = BranchInst::Create(II->getNormalDest(), CB.getIterator());
+      BranchInst *NewBr = BranchInst::Create(II->getNormalDest(), &CB);
       NewBr->setDebugLoc(Returns[0]->getDebugLoc());
     }
 
@@ -2813,7 +2813,7 @@ llvm::InlineResult llvm::InlineFunction(CallBase &CB, InlineFunctionInfo &IFI,
   if (InvokeInst *II = dyn_cast<InvokeInst>(&CB)) {
 
     // Add an unconditional branch to make this look like the CallInst case...
-    CreatedBranchToNormalDest = BranchInst::Create(II->getNormalDest(), CB.getIterator());
+    CreatedBranchToNormalDest = BranchInst::Create(II->getNormalDest(), &CB);
 
     // Split the basic block.  This guarantees that no PHI nodes will have to be
     // updated due to new incoming edges, and make the invoke case more
@@ -2881,7 +2881,7 @@ llvm::InlineResult llvm::InlineFunction(CallBase &CB, InlineFunctionInfo &IFI,
     DebugLoc Loc;
     for (unsigned i = 0, e = Returns.size(); i != e; ++i) {
       ReturnInst *RI = Returns[i];
-      BranchInst* BI = BranchInst::Create(AfterCallBB, RI->getIterator());
+      BranchInst* BI = BranchInst::Create(AfterCallBB, RI);
       Loc = RI->getDebugLoc();
       BI->setDebugLoc(Loc);
       RI->eraseFromParent();

diff  --git a/llvm/lib/Transforms/Utils/Local.cpp b/llvm/lib/Transforms/Utils/Local.cpp
index c4a8843f2840b3..075eeb5b19fd2b 100644
--- a/llvm/lib/Transforms/Utils/Local.cpp
+++ b/llvm/lib/Transforms/Utils/Local.cpp
@@ -2811,7 +2811,7 @@ unsigned llvm::changeToUnreachable(Instruction *I, bool PreserveLCSSA,
     if (DTU)
       UniqueSuccessors.insert(Successor);
   }
-  auto *UI = new UnreachableInst(I->getContext(), I->getIterator());
+  auto *UI = new UnreachableInst(I->getContext(), I);
   UI->setDebugLoc(I->getDebugLoc());
 
   // All instructions after this are dead.
@@ -2868,7 +2868,7 @@ CallInst *llvm::changeToCall(InvokeInst *II, DomTreeUpdater *DTU) {
 
   // Follow the call by a branch to the normal destination.
   BasicBlock *NormalDestBB = II->getNormalDest();
-  BranchInst::Create(NormalDestBB, II->getIterator());
+  BranchInst::Create(NormalDestBB, II);
 
   // Update PHI nodes in the unwind destination
   BasicBlock *BB = II->getParent();
@@ -3048,7 +3048,7 @@ static bool markAliveBlocks(Function &F,
             // jump to the normal destination branch.
             BasicBlock *NormalDestBB = II->getNormalDest();
             BasicBlock *UnwindDestBB = II->getUnwindDest();
-            BranchInst::Create(NormalDestBB, II->getIterator());
+            BranchInst::Create(NormalDestBB, II);
             UnwindDestBB->removePredecessor(II->getParent());
             II->eraseFromParent();
             if (DTU)
@@ -3131,12 +3131,12 @@ Instruction *llvm::removeUnwindEdge(BasicBlock *BB, DomTreeUpdater *DTU) {
   BasicBlock *UnwindDest;
 
   if (auto *CRI = dyn_cast<CleanupReturnInst>(TI)) {
-    NewTI = CleanupReturnInst::Create(CRI->getCleanupPad(), nullptr, CRI->getIterator());
+    NewTI = CleanupReturnInst::Create(CRI->getCleanupPad(), nullptr, CRI);
     UnwindDest = CRI->getUnwindDest();
   } else if (auto *CatchSwitch = dyn_cast<CatchSwitchInst>(TI)) {
     auto *NewCatchSwitch = CatchSwitchInst::Create(
         CatchSwitch->getParentPad(), nullptr, CatchSwitch->getNumHandlers(),
-        CatchSwitch->getName(), CatchSwitch->getIterator());
+        CatchSwitch->getName(), CatchSwitch);
     for (BasicBlock *PadBB : CatchSwitch->handlers())
       NewCatchSwitch->addHandler(PadBB);
 
@@ -3972,23 +3972,23 @@ bool llvm::recognizeBSwapOrBitReverseIdiom(
   // We may need to truncate the provider.
   if (DemandedTy != Provider->getType()) {
     auto *Trunc =
-        CastInst::CreateIntegerCast(Provider, DemandedTy, false, "trunc", I->getIterator());
+        CastInst::CreateIntegerCast(Provider, DemandedTy, false, "trunc", I);
     InsertedInsts.push_back(Trunc);
     Provider = Trunc;
   }
 
-  Instruction *Result = CallInst::Create(F, Provider, "rev", I->getIterator());
+  Instruction *Result = CallInst::Create(F, Provider, "rev", I);
   InsertedInsts.push_back(Result);
 
   if (!DemandedMask.isAllOnes()) {
     auto *Mask = ConstantInt::get(DemandedTy, DemandedMask);
-    Result = BinaryOperator::Create(Instruction::And, Result, Mask, "mask", I->getIterator());
+    Result = BinaryOperator::Create(Instruction::And, Result, Mask, "mask", I);
     InsertedInsts.push_back(Result);
   }
 
   // We may need to zeroextend back to the result type.
   if (ITy != Result->getType()) {
-    auto *ExtInst = CastInst::CreateIntegerCast(Result, ITy, false, "zext", I->getIterator());
+    auto *ExtInst = CastInst::CreateIntegerCast(Result, ITy, false, "zext", I);
     InsertedInsts.push_back(ExtInst);
   }
 

diff  --git a/llvm/lib/Transforms/Utils/LoopConstrainer.cpp b/llvm/lib/Transforms/Utils/LoopConstrainer.cpp
index 81545ef375219c..ea6d952cfa7d4f 100644
--- a/llvm/lib/Transforms/Utils/LoopConstrainer.cpp
+++ b/llvm/lib/Transforms/Utils/LoopConstrainer.cpp
@@ -644,7 +644,7 @@ LoopConstrainer::RewrittenRangeInfo LoopConstrainer::changeIterationSpaceEnd(
   // value of the same PHI nodes if/when we continue execution.
   for (PHINode &PN : LS.Header->phis()) {
     PHINode *NewPHI = PHINode::Create(PN.getType(), 2, PN.getName() + ".copy",
-                                      BranchToContinuation->getIterator());
+                                      BranchToContinuation);
 
     NewPHI->addIncoming(PN.getIncomingValueForBlock(Preheader), Preheader);
     NewPHI->addIncoming(PN.getIncomingValueForBlock(LS.Latch),
@@ -653,7 +653,7 @@ LoopConstrainer::RewrittenRangeInfo LoopConstrainer::changeIterationSpaceEnd(
   }
 
   RRI.IndVarEnd = PHINode::Create(IndVarBase->getType(), 2, "indvar.end",
-                                  BranchToContinuation->getIterator());
+                                  BranchToContinuation);
   RRI.IndVarEnd->addIncoming(IndVarStart, Preheader);
   RRI.IndVarEnd->addIncoming(IndVarBase, RRI.ExitSelector);
 

diff  --git a/llvm/lib/Transforms/Utils/LoopRotationUtils.cpp b/llvm/lib/Transforms/Utils/LoopRotationUtils.cpp
index cec47810e04447..adae796ee02997 100644
--- a/llvm/lib/Transforms/Utils/LoopRotationUtils.cpp
+++ b/llvm/lib/Transforms/Utils/LoopRotationUtils.cpp
@@ -874,7 +874,7 @@ bool LoopRotate::rotateLoop(Loop *L, bool SimplifiedLatch) {
       // We can fold the conditional branch in the preheader, this makes things
       // simpler. The first step is to remove the extra edge to the Exit block.
       Exit->removePredecessor(OrigPreheader, true /*preserve LCSSA*/);
-      BranchInst *NewBI = BranchInst::Create(NewHeader, PHBI->getIterator());
+      BranchInst *NewBI = BranchInst::Create(NewHeader, PHBI);
       NewBI->setDebugLoc(PHBI->getDebugLoc());
       PHBI->eraseFromParent();
 

diff  --git a/llvm/lib/Transforms/Utils/LoopSimplify.cpp b/llvm/lib/Transforms/Utils/LoopSimplify.cpp
index b38fecd6d8b416..07e622b1577fe1 100644
--- a/llvm/lib/Transforms/Utils/LoopSimplify.cpp
+++ b/llvm/lib/Transforms/Utils/LoopSimplify.cpp
@@ -399,7 +399,7 @@ static BasicBlock *insertUniqueBackedgeBlock(Loop *L, BasicBlock *Preheader,
   for (BasicBlock::iterator I = Header->begin(); isa<PHINode>(I); ++I) {
     PHINode *PN = cast<PHINode>(I);
     PHINode *NewPN = PHINode::Create(PN->getType(), BackedgeBlocks.size(),
-                                     PN->getName()+".be", BETerminator->getIterator());
+                                     PN->getName()+".be", BETerminator);
 
     // Loop over the PHI node, moving all entries except the one for the
     // preheader over to the new PHI node.

diff  --git a/llvm/lib/Transforms/Utils/LoopUnroll.cpp b/llvm/lib/Transforms/Utils/LoopUnroll.cpp
index 6f0d000815726e..ee6f7b35750af0 100644
--- a/llvm/lib/Transforms/Utils/LoopUnroll.cpp
+++ b/llvm/lib/Transforms/Utils/LoopUnroll.cpp
@@ -721,7 +721,7 @@ LoopUnrollResult llvm::UnrollLoop(Loop *L, UnrollLoopOptions ULO, LoopInfo *LI,
     DeadSucc->removePredecessor(Src, /* KeepOneInputPHIs */ true);
 
     // Replace the conditional branch with an unconditional one.
-    BranchInst::Create(Dest, Term->getIterator());
+    BranchInst::Create(Dest, Term);
     Term->eraseFromParent();
 
     DTUpdates.emplace_back(DominatorTree::Delete, Src, DeadSucc);

diff  --git a/llvm/lib/Transforms/Utils/LoopUnrollAndJam.cpp b/llvm/lib/Transforms/Utils/LoopUnrollAndJam.cpp
index c7b88d3c48a69f..26b8c790f2a062 100644
--- a/llvm/lib/Transforms/Utils/LoopUnrollAndJam.cpp
+++ b/llvm/lib/Transforms/Utils/LoopUnrollAndJam.cpp
@@ -522,7 +522,7 @@ llvm::UnrollAndJamLoop(Loop *L, unsigned Count, unsigned TripCount,
     // unconditional one to this one
     BranchInst *SubTerm =
         cast<BranchInst>(SubLoopBlocksLast[It - 1]->getTerminator());
-    BranchInst::Create(SubLoopBlocksFirst[It], SubTerm->getIterator());
+    BranchInst::Create(SubLoopBlocksFirst[It], SubTerm);
     SubTerm->eraseFromParent();
 
     SubLoopBlocksFirst[It]->replacePhiUsesWith(ForeBlocksLast[It],
@@ -535,7 +535,7 @@ llvm::UnrollAndJamLoop(Loop *L, unsigned Count, unsigned TripCount,
   // Aft blocks successors and phis
   BranchInst *AftTerm = cast<BranchInst>(AftBlocksLast.back()->getTerminator());
   if (CompletelyUnroll) {
-    BranchInst::Create(LoopExit, AftTerm->getIterator());
+    BranchInst::Create(LoopExit, AftTerm);
     AftTerm->eraseFromParent();
   } else {
     AftTerm->setSuccessor(!ContinueOnTrue, ForeBlocksFirst[0]);
@@ -550,7 +550,7 @@ llvm::UnrollAndJamLoop(Loop *L, unsigned Count, unsigned TripCount,
     // unconditional one to this one
     BranchInst *AftTerm =
         cast<BranchInst>(AftBlocksLast[It - 1]->getTerminator());
-    BranchInst::Create(AftBlocksFirst[It], AftTerm->getIterator());
+    BranchInst::Create(AftBlocksFirst[It], AftTerm);
     AftTerm->eraseFromParent();
 
     AftBlocksFirst[It]->replacePhiUsesWith(SubLoopBlocksLast[It],

diff  --git a/llvm/lib/Transforms/Utils/LowerGlobalDtors.cpp b/llvm/lib/Transforms/Utils/LowerGlobalDtors.cpp
index 791eeed9cb62cd..4908535cba5411 100644
--- a/llvm/lib/Transforms/Utils/LowerGlobalDtors.cpp
+++ b/llvm/lib/Transforms/Utils/LowerGlobalDtors.cpp
@@ -207,7 +207,7 @@ static bool runImpl(Module &M) {
       Value *Null = ConstantPointerNull::get(VoidStar);
       Value *Args[] = {CallDtors, Null, DsoHandle};
       Value *Res = CallInst::Create(AtExit, Args, "call", EntryBB);
-      Value *Cmp = new ICmpInst(EntryBB, ICmpInst::ICMP_NE, Res,
+      Value *Cmp = new ICmpInst(*EntryBB, ICmpInst::ICMP_NE, Res,
                                 Constant::getNullValue(Res->getType()));
       BranchInst::Create(FailBB, RetBB, Cmp, EntryBB);
 

diff  --git a/llvm/lib/Transforms/Utils/LowerInvoke.cpp b/llvm/lib/Transforms/Utils/LowerInvoke.cpp
index ff2ab3c6dce9c8..22ff3c2e5848fc 100644
--- a/llvm/lib/Transforms/Utils/LowerInvoke.cpp
+++ b/llvm/lib/Transforms/Utils/LowerInvoke.cpp
@@ -52,7 +52,7 @@ static bool runImpl(Function &F) {
       // Insert a normal call instruction...
       CallInst *NewCall =
           CallInst::Create(II->getFunctionType(), II->getCalledOperand(),
-                           CallArgs, OpBundles, "", II->getIterator());
+                           CallArgs, OpBundles, "", II);
       NewCall->takeName(II);
       NewCall->setCallingConv(II->getCallingConv());
       NewCall->setAttributes(II->getAttributes());
@@ -60,7 +60,7 @@ static bool runImpl(Function &F) {
       II->replaceAllUsesWith(NewCall);
 
       // Insert an unconditional branch to the normal destination.
-      BranchInst::Create(II->getNormalDest(), II->getIterator());
+      BranchInst::Create(II->getNormalDest(), II);
 
       // Remove any PHI node entries from the exception destination.
       II->getUnwindDest()->removePredecessor(&BB);

diff  --git a/llvm/lib/Transforms/Utils/LowerMemIntrinsics.cpp b/llvm/lib/Transforms/Utils/LowerMemIntrinsics.cpp
index acd3f2802031ea..88934a34d2e2a0 100644
--- a/llvm/lib/Transforms/Utils/LowerMemIntrinsics.cpp
+++ b/llvm/lib/Transforms/Utils/LowerMemIntrinsics.cpp
@@ -384,10 +384,10 @@ static void createMemMoveLoop(Instruction *InsertBefore, Value *SrcAddr,
   // SplitBlockAndInsertIfThenElse conveniently creates the basic if-then-else
   // structure. Its block terminators (unconditional branches) are replaced by
   // the appropriate conditional branches when the loop is built.
-  ICmpInst *PtrCompare = new ICmpInst(InsertBefore->getIterator(), ICmpInst::ICMP_ULT,
+  ICmpInst *PtrCompare = new ICmpInst(InsertBefore, ICmpInst::ICMP_ULT,
                                       SrcAddr, DstAddr, "compare_src_dst");
   Instruction *ThenTerm, *ElseTerm;
-  SplitBlockAndInsertIfThenElse(PtrCompare, InsertBefore->getIterator(), &ThenTerm,
+  SplitBlockAndInsertIfThenElse(PtrCompare, InsertBefore, &ThenTerm,
                                 &ElseTerm);
 
   // Each part of the function consists of two blocks:
@@ -409,7 +409,7 @@ static void createMemMoveLoop(Instruction *InsertBefore, Value *SrcAddr,
   // Initial comparison of n == 0 that lets us skip the loops altogether. Shared
   // between both backwards and forward copy clauses.
   ICmpInst *CompareN =
-      new ICmpInst(OrigBB->getTerminator()->getIterator(), ICmpInst::ICMP_EQ, CopyLen,
+      new ICmpInst(OrigBB->getTerminator(), ICmpInst::ICMP_EQ, CopyLen,
                    ConstantInt::get(TypeOfCopyLen, 0), "compare_n_to_0");
 
   // Copying backwards.
@@ -431,7 +431,7 @@ static void createMemMoveLoop(Instruction *InsertBefore, Value *SrcAddr,
       ExitBB, LoopBB);
   LoopPhi->addIncoming(IndexPtr, LoopBB);
   LoopPhi->addIncoming(CopyLen, CopyBackwardsBB);
-  BranchInst::Create(ExitBB, LoopBB, CompareN, ThenTerm->getIterator());
+  BranchInst::Create(ExitBB, LoopBB, CompareN, ThenTerm);
   ThenTerm->eraseFromParent();
 
   // Copying forward.
@@ -451,7 +451,7 @@ static void createMemMoveLoop(Instruction *InsertBefore, Value *SrcAddr,
   FwdCopyPhi->addIncoming(FwdIndexPtr, FwdLoopBB);
   FwdCopyPhi->addIncoming(ConstantInt::get(TypeOfCopyLen, 0), CopyForwardBB);
 
-  BranchInst::Create(ExitBB, FwdLoopBB, CompareN, ElseTerm->getIterator());
+  BranchInst::Create(ExitBB, FwdLoopBB, CompareN, ElseTerm);
   ElseTerm->eraseFromParent();
 }
 

diff  --git a/llvm/lib/Transforms/Utils/LowerSwitch.cpp b/llvm/lib/Transforms/Utils/LowerSwitch.cpp
index f5921e5ccb0914..4131d36b572d74 100644
--- a/llvm/lib/Transforms/Utils/LowerSwitch.cpp
+++ b/llvm/lib/Transforms/Utils/LowerSwitch.cpp
@@ -165,20 +165,20 @@ BasicBlock *NewLeafBlock(CaseRange &Leaf, Value *Val, ConstantInt *LowerBound,
   if (Leaf.Low == Leaf.High) {
     // Make the seteq instruction...
     Comp =
-        new ICmpInst(NewLeaf, ICmpInst::ICMP_EQ, Val, Leaf.Low, "SwitchLeaf");
+        new ICmpInst(*NewLeaf, ICmpInst::ICMP_EQ, Val, Leaf.Low, "SwitchLeaf");
   } else {
     // Make range comparison
     if (Leaf.Low == LowerBound) {
       // Val >= Min && Val <= Hi --> Val <= Hi
-      Comp = new ICmpInst(NewLeaf, ICmpInst::ICMP_SLE, Val, Leaf.High,
+      Comp = new ICmpInst(*NewLeaf, ICmpInst::ICMP_SLE, Val, Leaf.High,
                           "SwitchLeaf");
     } else if (Leaf.High == UpperBound) {
       // Val <= Max && Val >= Lo --> Val >= Lo
-      Comp = new ICmpInst(NewLeaf, ICmpInst::ICMP_SGE, Val, Leaf.Low,
+      Comp = new ICmpInst(*NewLeaf, ICmpInst::ICMP_SGE, Val, Leaf.Low,
                           "SwitchLeaf");
     } else if (Leaf.Low->isZero()) {
       // Val >= 0 && Val <= Hi --> Val <=u Hi
-      Comp = new ICmpInst(NewLeaf, ICmpInst::ICMP_ULE, Val, Leaf.High,
+      Comp = new ICmpInst(*NewLeaf, ICmpInst::ICMP_ULE, Val, Leaf.High,
                           "SwitchLeaf");
     } else {
       // Emit V-Lo <=u Hi-Lo
@@ -186,7 +186,7 @@ BasicBlock *NewLeafBlock(CaseRange &Leaf, Value *Val, ConstantInt *LowerBound,
       Instruction *Add = BinaryOperator::CreateAdd(
           Val, NegLo, Val->getName() + ".off", NewLeaf);
       Constant *UpperBound = ConstantExpr::getAdd(NegLo, Leaf.High);
-      Comp = new ICmpInst(NewLeaf, ICmpInst::ICMP_ULE, Add, UpperBound,
+      Comp = new ICmpInst(*NewLeaf, ICmpInst::ICMP_ULE, Add, UpperBound,
                           "SwitchLeaf");
     }
   }

diff  --git a/llvm/lib/Transforms/Utils/MatrixUtils.cpp b/llvm/lib/Transforms/Utils/MatrixUtils.cpp
index 7866d6434c1156..e218773cf5da15 100644
--- a/llvm/lib/Transforms/Utils/MatrixUtils.cpp
+++ b/llvm/lib/Transforms/Utils/MatrixUtils.cpp
@@ -36,7 +36,7 @@ BasicBlock *TileInfo::CreateLoop(BasicBlock *Preheader, BasicBlock *Exit,
   BranchInst::Create(Body, Header);
   BranchInst::Create(Latch, Body);
   PHINode *IV =
-      PHINode::Create(I32Ty, 2, Name + ".iv", Header->getTerminator()->getIterator());
+      PHINode::Create(I32Ty, 2, Name + ".iv", Header->getTerminator());
   IV->addIncoming(ConstantInt::get(I32Ty, 0), Preheader);
 
   B.SetInsertPoint(Latch);

diff  --git a/llvm/lib/Transforms/Utils/MemoryTaggingSupport.cpp b/llvm/lib/Transforms/Utils/MemoryTaggingSupport.cpp
index 2ffe89a2458405..2ff7c015107677 100644
--- a/llvm/lib/Transforms/Utils/MemoryTaggingSupport.cpp
+++ b/llvm/lib/Transforms/Utils/MemoryTaggingSupport.cpp
@@ -219,7 +219,7 @@ void alignAndPadAlloca(memtag::AllocaInfo &Info, llvm::Align Alignment) {
   Type *PaddingType = ArrayType::get(Type::getInt8Ty(Ctx), AlignedSize - Size);
   Type *TypeWithPadding = StructType::get(AllocatedType, PaddingType);
   auto *NewAI = new AllocaInst(TypeWithPadding, Info.AI->getAddressSpace(),
-                               nullptr, "", Info.AI->getIterator());
+                               nullptr, "", Info.AI);
   NewAI->takeName(Info.AI);
   NewAI->setAlignment(Info.AI->getAlign());
   NewAI->setUsedWithInAlloca(Info.AI->isUsedWithInAlloca());
@@ -230,7 +230,7 @@ void alignAndPadAlloca(memtag::AllocaInfo &Info, llvm::Align Alignment) {
 
   // TODO: Remove when typed pointers dropped
   if (Info.AI->getType() != NewAI->getType())
-    NewPtr = new BitCastInst(NewAI, Info.AI->getType(), "", Info.AI->getIterator());
+    NewPtr = new BitCastInst(NewAI, Info.AI->getType(), "", Info.AI);
 
   Info.AI->replaceAllUsesWith(NewPtr);
   Info.AI->eraseFromParent();

diff  --git a/llvm/lib/Transforms/Utils/SCCPSolver.cpp b/llvm/lib/Transforms/Utils/SCCPSolver.cpp
index a185e8cd371c60..3dc6016a0a373f 100644
--- a/llvm/lib/Transforms/Utils/SCCPSolver.cpp
+++ b/llvm/lib/Transforms/Utils/SCCPSolver.cpp
@@ -177,7 +177,7 @@ static bool replaceSignedInst(SCCPSolver &Solver,
     Value *Op0 = Inst.getOperand(0);
     if (InsertedValues.count(Op0) || !isNonNegative(Op0))
       return false;
-    NewInst = new ZExtInst(Op0, Inst.getType(), "", Inst.getIterator());
+    NewInst = new ZExtInst(Op0, Inst.getType(), "", &Inst);
     NewInst->setNonNeg();
     break;
   }
@@ -186,7 +186,7 @@ static bool replaceSignedInst(SCCPSolver &Solver,
     Value *Op0 = Inst.getOperand(0);
     if (InsertedValues.count(Op0) || !isNonNegative(Op0))
       return false;
-    NewInst = BinaryOperator::CreateLShr(Op0, Inst.getOperand(1), "", Inst.getIterator());
+    NewInst = BinaryOperator::CreateLShr(Op0, Inst.getOperand(1), "", &Inst);
     NewInst->setIsExact(Inst.isExact());
     break;
   }
@@ -199,7 +199,7 @@ static bool replaceSignedInst(SCCPSolver &Solver,
       return false;
     auto NewOpcode = Inst.getOpcode() == Instruction::SDiv ? Instruction::UDiv
                                                            : Instruction::URem;
-    NewInst = BinaryOperator::Create(NewOpcode, Op0, Op1, "", Inst.getIterator());
+    NewInst = BinaryOperator::Create(NewOpcode, Op0, Op1, "", &Inst);
     if (Inst.getOpcode() == Instruction::SDiv)
       NewInst->setIsExact(Inst.isExact());
     break;

diff  --git a/llvm/lib/Transforms/Utils/ScalarEvolutionExpander.cpp b/llvm/lib/Transforms/Utils/ScalarEvolutionExpander.cpp
index 3a3bcde7c3dcdd..0f67cc3ff4faca 100644
--- a/llvm/lib/Transforms/Utils/ScalarEvolutionExpander.cpp
+++ b/llvm/lib/Transforms/Utils/ScalarEvolutionExpander.cpp
@@ -1267,7 +1267,7 @@ Value *SCEVExpander::visitAddRecExpr(const SCEVAddRecExpr *S) {
         // corresponding to the back-edge.
         Instruction *Add = BinaryOperator::CreateAdd(CanonicalIV, One,
                                                      "indvar.next",
-                                                     HP->getTerminator()->getIterator());
+                                                     HP->getTerminator());
         Add->setDebugLoc(HP->getTerminator()->getDebugLoc());
         rememberInstruction(Add);
         CanonicalIV->addIncoming(Add, HP);
@@ -2232,7 +2232,7 @@ Value *SCEVExpander::fixupLCSSAFormFor(Value *V) {
   if (!PreserveLCSSA || !DefI)
     return V;
 
-  BasicBlock::iterator InsertPt = Builder.GetInsertPoint();
+  Instruction *InsertPt = &*Builder.GetInsertPoint();
   Loop *DefLoop = SE.LI.getLoopFor(DefI->getParent());
   Loop *UseLoop = SE.LI.getLoopFor(InsertPt->getParent());
   if (!DefLoop || UseLoop == DefLoop || DefLoop->contains(UseLoop))

diff  --git a/llvm/lib/Transforms/Utils/SimplifyCFG.cpp b/llvm/lib/Transforms/Utils/SimplifyCFG.cpp
index fe65e52110f97a..bbdbfbbf776f32 100644
--- a/llvm/lib/Transforms/Utils/SimplifyCFG.cpp
+++ b/llvm/lib/Transforms/Utils/SimplifyCFG.cpp
@@ -2710,7 +2710,7 @@ static void MergeCompatibleInvokesImpl(ArrayRef<InvokeInst *> Invokes,
 
     // Form a PHI out of all the data ops under this index.
     PHINode *PN = PHINode::Create(
-        U->getType(), /*NumReservedValues=*/Invokes.size(), "", MergedInvoke->getIterator());
+        U->getType(), /*NumReservedValues=*/Invokes.size(), "", MergedInvoke);
     for (InvokeInst *II : Invokes)
       PN->addIncoming(II->getOperand(U.getOperandNo()), II->getParent());
 
@@ -4663,7 +4663,7 @@ bool SimplifyCFGOpt::SimplifyTerminatorOnSelect(Instruction *OldTerm,
   } else if (KeepEdge1 && (KeepEdge2 || TrueBB == FalseBB)) {
     // Neither of the selected blocks were successors, so this
     // terminator must be unreachable.
-    new UnreachableInst(OldTerm->getContext(), OldTerm->getIterator());
+    new UnreachableInst(OldTerm->getContext(), OldTerm);
   } else {
     // One of the selected values was a successor, but the other wasn't.
     // Insert an unconditional branch to the one that was found;
@@ -5353,7 +5353,7 @@ bool SimplifyCFGOpt::simplifyUnreachable(UnreachableInst *UI) {
       // or a degenerate conditional branch with matching destinations.
       if (all_of(BI->successors(),
                  [BB](auto *Successor) { return Successor == BB; })) {
-        new UnreachableInst(TI->getContext(), TI->getIterator());
+        new UnreachableInst(TI->getContext(), TI);
         TI->eraseFromParent();
         Changed = true;
       } else {
@@ -5452,7 +5452,7 @@ bool SimplifyCFGOpt::simplifyUnreachable(UnreachableInst *UI) {
             removeUnwindEdge(EHPred, DTU);
         }
         // The catchswitch is no longer reachable.
-        new UnreachableInst(CSI->getContext(), CSI->getIterator());
+        new UnreachableInst(CSI->getContext(), CSI);
         CSI->eraseFromParent();
         Changed = true;
       }
@@ -5462,7 +5462,7 @@ bool SimplifyCFGOpt::simplifyUnreachable(UnreachableInst *UI) {
              "Expected to always have an unwind to BB.");
       if (DTU)
         Updates.push_back({DominatorTree::Delete, Predecessor, BB});
-      new UnreachableInst(TI->getContext(), TI->getIterator());
+      new UnreachableInst(TI->getContext(), TI);
       TI->eraseFromParent();
       Changed = true;
     }
@@ -6604,7 +6604,7 @@ static void reuseTableCompare(
     // The compare yields the same result, just inverted. We can replace it.
     Value *InvertedTableCmp = BinaryOperator::CreateXor(
         RangeCmp, ConstantInt::get(RangeCmp->getType(), 1), "inverted.cmp",
-        RangeCheckBranch->getIterator());
+        RangeCheckBranch);
     CmpInst->replaceAllUsesWith(InvertedTableCmp);
     ++NumTableCmpReuses;
   }
@@ -7155,14 +7155,14 @@ bool SimplifyCFGOpt::simplifyIndirectBr(IndirectBrInst *IBI) {
 
   if (IBI->getNumDestinations() == 0) {
     // If the indirectbr has no successors, change it to unreachable.
-    new UnreachableInst(IBI->getContext(), IBI->getIterator());
+    new UnreachableInst(IBI->getContext(), IBI);
     EraseTerminatorAndDCECond(IBI);
     return true;
   }
 
   if (IBI->getNumDestinations() == 1) {
     // If the indirectbr has one successor, change it to a direct branch.
-    BranchInst::Create(IBI->getDestination(0), IBI->getIterator());
+    BranchInst::Create(IBI->getDestination(0), IBI);
     EraseTerminatorAndDCECond(IBI);
     return true;
   }

diff  --git a/llvm/lib/Transforms/Utils/SimplifyIndVar.cpp b/llvm/lib/Transforms/Utils/SimplifyIndVar.cpp
index b8fa985fa3462e..297cfe5124d85d 100644
--- a/llvm/lib/Transforms/Utils/SimplifyIndVar.cpp
+++ b/llvm/lib/Transforms/Utils/SimplifyIndVar.cpp
@@ -301,7 +301,7 @@ bool SimplifyIndvar::eliminateSDiv(BinaryOperator *SDiv) {
   if (SE->isKnownNonNegative(N) && SE->isKnownNonNegative(D)) {
     auto *UDiv = BinaryOperator::Create(
         BinaryOperator::UDiv, SDiv->getOperand(0), SDiv->getOperand(1),
-        SDiv->getName() + ".udiv", SDiv->getIterator());
+        SDiv->getName() + ".udiv", SDiv);
     UDiv->setIsExact(SDiv->isExact());
     SDiv->replaceAllUsesWith(UDiv);
     LLVM_DEBUG(dbgs() << "INDVARS: Simplified sdiv: " << *SDiv << '\n');
@@ -318,7 +318,7 @@ bool SimplifyIndvar::eliminateSDiv(BinaryOperator *SDiv) {
 void SimplifyIndvar::replaceSRemWithURem(BinaryOperator *Rem) {
   auto *N = Rem->getOperand(0), *D = Rem->getOperand(1);
   auto *URem = BinaryOperator::Create(BinaryOperator::URem, N, D,
-                                      Rem->getName() + ".urem", Rem->getIterator());
+                                      Rem->getName() + ".urem", Rem);
   Rem->replaceAllUsesWith(URem);
   LLVM_DEBUG(dbgs() << "INDVARS: Simplified srem: " << *Rem << '\n');
   ++NumSimplifiedSRem;
@@ -339,9 +339,9 @@ void SimplifyIndvar::replaceRemWithNumerator(BinaryOperator *Rem) {
 void SimplifyIndvar::replaceRemWithNumeratorOrZero(BinaryOperator *Rem) {
   auto *T = Rem->getType();
   auto *N = Rem->getOperand(0), *D = Rem->getOperand(1);
-  ICmpInst *ICmp = new ICmpInst(Rem->getIterator(), ICmpInst::ICMP_EQ, N, D);
+  ICmpInst *ICmp = new ICmpInst(Rem, ICmpInst::ICMP_EQ, N, D);
   SelectInst *Sel =
-      SelectInst::Create(ICmp, ConstantInt::get(T, 0), N, "iv.rem", Rem->getIterator());
+      SelectInst::Create(ICmp, ConstantInt::get(T, 0), N, "iv.rem", Rem);
   Rem->replaceAllUsesWith(Sel);
   LLVM_DEBUG(dbgs() << "INDVARS: Simplified rem: " << *Rem << '\n');
   ++NumElimRem;
@@ -411,7 +411,7 @@ bool SimplifyIndvar::eliminateOverflowIntrinsic(WithOverflowInst *WO) {
   // intrinsic as well.
 
   BinaryOperator *NewResult = BinaryOperator::Create(
-      WO->getBinaryOp(), WO->getLHS(), WO->getRHS(), "", WO->getIterator());
+      WO->getBinaryOp(), WO->getLHS(), WO->getRHS(), "", WO);
 
   if (WO->isSigned())
     NewResult->setHasNoSignedWrap(true);
@@ -449,7 +449,7 @@ bool SimplifyIndvar::eliminateSaturatingIntrinsic(SaturatingInst *SI) {
     return false;
 
   BinaryOperator *BO = BinaryOperator::Create(
-      SI->getBinaryOp(), SI->getLHS(), SI->getRHS(), SI->getName(), SI->getIterator());
+      SI->getBinaryOp(), SI->getLHS(), SI->getRHS(), SI->getName(), SI);
   if (SI->isSigned())
     BO->setHasNoSignedWrap();
   else
@@ -1767,7 +1767,7 @@ Instruction *WidenIV::widenIVUse(WidenIV::NarrowIVDefUse DU,
 
         PHINode *WidePhi =
           PHINode::Create(DU.WideDef->getType(), 1, UsePhi->getName() + ".wide",
-                          UsePhi->getIterator());
+                          UsePhi);
         WidePhi->addIncoming(DU.WideDef, UsePhi->getIncomingBlock(0));
         BasicBlock *WidePhiBB = WidePhi->getParent();
         IRBuilder<> Builder(WidePhiBB, WidePhiBB->getFirstInsertionPt());

diff  --git a/llvm/lib/Transforms/Utils/StripGCRelocates.cpp b/llvm/lib/Transforms/Utils/StripGCRelocates.cpp
index 3ae76ffd5ecab4..6094f36a77f45c 100644
--- a/llvm/lib/Transforms/Utils/StripGCRelocates.cpp
+++ b/llvm/lib/Transforms/Utils/StripGCRelocates.cpp
@@ -42,7 +42,7 @@ static bool stripGCRelocates(Function &F) {
     // All gc_relocates are i8 addrspace(1)* typed, we need a bitcast from i8
     // addrspace(1)* to the type of the OrigPtr, if the are not the same.
     if (GCRel->getType() != OrigPtr->getType())
-      ReplaceGCRel = new BitCastInst(OrigPtr, GCRel->getType(), "cast", GCRel->getIterator());
+      ReplaceGCRel = new BitCastInst(OrigPtr, GCRel->getType(), "cast", GCRel);
 
     // Replace all uses of gc.relocate and delete the gc.relocate
     // There maybe unncessary bitcasts back to the OrigPtr type, an instcombine

diff  --git a/llvm/lib/Transforms/Utils/UnifyLoopExits.cpp b/llvm/lib/Transforms/Utils/UnifyLoopExits.cpp
index 1d51f61351fe27..2f37f7f972cbbf 100644
--- a/llvm/lib/Transforms/Utils/UnifyLoopExits.cpp
+++ b/llvm/lib/Transforms/Utils/UnifyLoopExits.cpp
@@ -119,7 +119,7 @@ static void restoreSSA(const DominatorTree &DT, const Loop *L,
     LLVM_DEBUG(dbgs() << "externally used: " << Def->getName() << "\n");
     auto NewPhi =
         PHINode::Create(Def->getType(), Incoming.size(),
-                        Def->getName() + ".moved", LoopExitBlock->begin());
+                        Def->getName() + ".moved", &LoopExitBlock->front());
     for (auto *In : Incoming) {
       LLVM_DEBUG(dbgs() << "predecessor " << In->getName() << ": ");
       if (Def->getParent() == In || DT.dominates(Def, In)) {

diff  --git a/llvm/tools/bugpoint/Miscompilation.cpp b/llvm/tools/bugpoint/Miscompilation.cpp
index b165b8220c20bd..22806bab83eecf 100644
--- a/llvm/tools/bugpoint/Miscompilation.cpp
+++ b/llvm/tools/bugpoint/Miscompilation.cpp
@@ -884,7 +884,7 @@ CleanupAndPrepareModules(BugDriver &BD, std::unique_ptr<Module> Test,
           // Check to see if we already looked up the value.
           Value *CachedVal =
               new LoadInst(F->getType(), Cache, "fpcache", EntryBB);
-          Value *IsNull = new ICmpInst(EntryBB, ICmpInst::ICMP_EQ, CachedVal,
+          Value *IsNull = new ICmpInst(*EntryBB, ICmpInst::ICMP_EQ, CachedVal,
                                        NullPtr, "isNull");
           BranchInst::Create(LookupBB, DoCallBB, IsNull, EntryBB);
 


        


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