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-rw-r--r--polly/lib/Analysis/ScopInfo.cpp2
-rw-r--r--polly/lib/CodeGen/BlockGenerators.cpp42
-rw-r--r--polly/lib/CodeGen/CodeGeneration.cpp2
-rw-r--r--polly/lib/CodeGen/IslExprBuilder.cpp4
-rw-r--r--polly/lib/CodeGen/IslNodeBuilder.cpp38
-rw-r--r--polly/lib/CodeGen/LoopGenerators.cpp14
-rw-r--r--polly/lib/CodeGen/RuntimeDebugBuilder.cpp2
-rw-r--r--polly/lib/Support/ScopHelper.cpp2
8 files changed, 54 insertions, 52 deletions
diff --git a/polly/lib/Analysis/ScopInfo.cpp b/polly/lib/Analysis/ScopInfo.cpp
index 16ada559c8c..7efebe18dcc 100644
--- a/polly/lib/Analysis/ScopInfo.cpp
+++ b/polly/lib/Analysis/ScopInfo.cpp
@@ -3593,7 +3593,7 @@ void ScopInfo::buildAccessFunctions(Region &R, BasicBlock &BB,
auto &ScopRIL = *SD->getRequiredInvariantLoads(&R);
for (BasicBlock::iterator I = BB.begin(), E = --BB.end(); I != E; ++I) {
- Instruction *Inst = I;
+ Instruction *Inst = &*I;
PHINode *PHI = dyn_cast<PHINode>(Inst);
if (PHI)
diff --git a/polly/lib/CodeGen/BlockGenerators.cpp b/polly/lib/CodeGen/BlockGenerators.cpp
index f51d2a441f3..40e83acc1fa 100644
--- a/polly/lib/CodeGen/BlockGenerators.cpp
+++ b/polly/lib/CodeGen/BlockGenerators.cpp
@@ -79,7 +79,7 @@ Value *BlockGenerator::trySynthesizeNewValue(ScopStmt &Stmt, Value *Old,
assert(IP != Builder.GetInsertBlock()->end() &&
"Only instructions can be insert points for SCEVExpander");
Value *Expanded = expandCodeFor(S, SE, DL, "polly", NewScev,
- Old->getType(), IP, &VTV);
+ Old->getType(), &*IP, &VTV);
BBMap[Old] = Expanded;
return Expanded;
@@ -281,8 +281,8 @@ void BlockGenerator::copyStmt(ScopStmt &Stmt, LoopToScevMapT &LTS,
}
BasicBlock *BlockGenerator::splitBB(BasicBlock *BB) {
- BasicBlock *CopyBB =
- SplitBlock(Builder.GetInsertBlock(), Builder.GetInsertPoint(), &DT, &LI);
+ BasicBlock *CopyBB = SplitBlock(Builder.GetInsertBlock(),
+ &*Builder.GetInsertPoint(), &DT, &LI);
CopyBB->setName("polly.stmt." + BB->getName());
return CopyBB;
}
@@ -291,7 +291,7 @@ BasicBlock *BlockGenerator::copyBB(ScopStmt &Stmt, BasicBlock *BB,
ValueMapT &BBMap, LoopToScevMapT &LTS,
isl_id_to_ast_expr *NewAccesses) {
BasicBlock *CopyBB = splitBB(BB);
- Builder.SetInsertPoint(CopyBB->begin());
+ Builder.SetInsertPoint(&CopyBB->front());
generateScalarLoads(Stmt, BBMap);
copyBB(Stmt, BB, CopyBB, BBMap, LTS, NewAccesses);
@@ -319,7 +319,7 @@ Value *BlockGenerator::getOrCreateAlloca(Value *ScalarBase,
auto *Ty = ScalarBase->getType();
auto NewAddr = new AllocaInst(Ty, ScalarBase->getName() + NameExt);
EntryBB = &Builder.GetInsertBlock()->getParent()->getEntryBlock();
- NewAddr->insertBefore(EntryBB->getFirstInsertionPt());
+ NewAddr->insertBefore(&*EntryBB->getFirstInsertionPt());
Map[ScalarBase] = NewAddr;
}
@@ -549,7 +549,7 @@ void BlockGenerator::createScalarFinalization(Region &R) {
// Create the merge PHI that merges the optimized and unoptimized version.
PHINode *MergePHI = PHINode::Create(EscapeInst->getType(), 2,
EscapeInst->getName() + ".merge");
- MergePHI->insertBefore(MergeBB->getFirstInsertionPt());
+ MergePHI->insertBefore(&*MergeBB->getFirstInsertionPt());
// Add the respective values to the merge PHI.
MergePHI->addIncoming(EscapeInstReload, OptExitBB);
@@ -624,7 +624,7 @@ void BlockGenerator::createExitPHINodeMerges(Scop &S) {
Reload = Builder.CreateBitOrPointerCast(Reload, PHI->getType());
Value *OriginalValue = PHI->getIncomingValueForBlock(MergeBB);
auto *MergePHI = PHINode::Create(PHI->getType(), 2, Name + ".ph.merge");
- MergePHI->insertBefore(MergeBB->getFirstInsertionPt());
+ MergePHI->insertBefore(&*MergeBB->getFirstInsertionPt());
MergePHI->addIncoming(Reload, OptExitBB);
MergePHI->addIncoming(OriginalValue, ExitBB);
int Idx = PHI->getBasicBlockIndex(MergeBB);
@@ -965,10 +965,10 @@ void VectorBlockGenerator::copyStmt(
"the vector block generator");
BasicBlock *BB = Stmt.getBasicBlock();
- BasicBlock *CopyBB =
- SplitBlock(Builder.GetInsertBlock(), Builder.GetInsertPoint(), &DT, &LI);
+ BasicBlock *CopyBB = SplitBlock(Builder.GetInsertBlock(),
+ &*Builder.GetInsertPoint(), &DT, &LI);
CopyBB->setName("polly.stmt." + BB->getName());
- Builder.SetInsertPoint(CopyBB->begin());
+ Builder.SetInsertPoint(&CopyBB->front());
// Create two maps that store the mapping from the original instructions of
// the old basic block to their copies in the new basic block. Those maps
@@ -1022,10 +1022,10 @@ void RegionGenerator::copyStmt(ScopStmt &Stmt, LoopToScevMapT &LTS,
// Create a dedicated entry for the region where we can reload all demoted
// inputs.
BasicBlock *EntryBB = R->getEntry();
- BasicBlock *EntryBBCopy =
- SplitBlock(Builder.GetInsertBlock(), Builder.GetInsertPoint(), &DT, &LI);
+ BasicBlock *EntryBBCopy = SplitBlock(Builder.GetInsertBlock(),
+ &*Builder.GetInsertPoint(), &DT, &LI);
EntryBBCopy->setName("polly.stmt." + EntryBB->getName() + ".entry");
- Builder.SetInsertPoint(EntryBBCopy->begin());
+ Builder.SetInsertPoint(&EntryBBCopy->front());
generateScalarLoads(Stmt, RegionMaps[EntryBBCopy]);
@@ -1057,7 +1057,7 @@ void RegionGenerator::copyStmt(ScopStmt &Stmt, LoopToScevMapT &LTS,
RegionMap = RegionMaps[BBCopyIDom];
// Copy the block with the BlockGenerator.
- Builder.SetInsertPoint(BBCopy->begin());
+ Builder.SetInsertPoint(&BBCopy->front());
copyBB(Stmt, BB, BBCopy, RegionMap, LTS, IdToAstExp);
// In order to remap PHI nodes we store also basic block mappings.
@@ -1079,8 +1079,8 @@ void RegionGenerator::copyStmt(ScopStmt &Stmt, LoopToScevMapT &LTS,
}
// Now create a new dedicated region exit block and add it to the region map.
- BasicBlock *ExitBBCopy =
- SplitBlock(Builder.GetInsertBlock(), Builder.GetInsertPoint(), &DT, &LI);
+ BasicBlock *ExitBBCopy = SplitBlock(Builder.GetInsertBlock(),
+ &*Builder.GetInsertPoint(), &DT, &LI);
ExitBBCopy->setName("polly.stmt." + R->getExit()->getName() + ".exit");
BlockMap[R->getExit()] = ExitBBCopy;
@@ -1122,7 +1122,7 @@ void RegionGenerator::copyStmt(ScopStmt &Stmt, LoopToScevMapT &LTS,
PHINode::Create(Builder.getInt32Ty(), 2, "polly.subregion.iv");
Instruction *LoopPHIInc = BinaryOperator::CreateAdd(
LoopPHI, Builder.getInt32(1), "polly.subregion.iv.inc");
- LoopPHI->insertBefore(BBCopy->begin());
+ LoopPHI->insertBefore(&BBCopy->front());
LoopPHIInc->insertBefore(BBCopy->getTerminator());
for (auto *PredBB : make_range(pred_begin(BB), pred_end(BB))) {
@@ -1142,7 +1142,7 @@ void RegionGenerator::copyStmt(ScopStmt &Stmt, LoopToScevMapT &LTS,
}
// Continue generating code in the exit block.
- Builder.SetInsertPoint(ExitBBCopy->getFirstInsertionPt());
+ Builder.SetInsertPoint(&*ExitBBCopy->getFirstInsertionPt());
// Write values visible to other statements.
generateScalarStores(Stmt, LTS, ValueMap);
@@ -1168,6 +1168,7 @@ void RegionGenerator::generateScalarStores(ScopStmt &Stmt, LoopToScevMapT &LTS,
// In case we add the store into an exiting block, we need to restore the
// position for stores in the exit node.
+ BasicBlock *SavedInsertBB = Builder.GetInsertBlock();
auto SavedInsertionPoint = Builder.GetInsertPoint();
ValueMapT *LocalBBMap = &BBMap;
@@ -1189,7 +1190,7 @@ void RegionGenerator::generateScalarStores(ScopStmt &Stmt, LoopToScevMapT &LTS,
// Restore the insertion point if necessary.
if (isa<TerminatorInst>(ScalarInst))
- Builder.SetInsertPoint(SavedInsertionPoint);
+ Builder.SetInsertPoint(SavedInsertBB, SavedInsertionPoint);
}
}
@@ -1216,10 +1217,11 @@ void RegionGenerator::addOperandToPHI(ScopStmt &Stmt, const PHINode *PHI,
Value *Op = PHI->getIncomingValueForBlock(IncomingBB);
+ BasicBlock *OldBlock = Builder.GetInsertBlock();
auto OldIP = Builder.GetInsertPoint();
Builder.SetInsertPoint(BBCopy->getTerminator());
OpCopy = getNewValue(Stmt, Op, BBCopyMap, LTS, getLoopForInst(PHI));
- Builder.SetInsertPoint(OldIP);
+ Builder.SetInsertPoint(OldBlock, OldIP);
} else {
if (PHICopy->getBasicBlockIndex(BBCopy) >= 0)
diff --git a/polly/lib/CodeGen/CodeGeneration.cpp b/polly/lib/CodeGen/CodeGeneration.cpp
index 4ea9db338bc..7e6f044953d 100644
--- a/polly/lib/CodeGen/CodeGeneration.cpp
+++ b/polly/lib/CodeGen/CodeGeneration.cpp
@@ -153,7 +153,7 @@ public:
Value *RTC = buildRTC(Builder, NodeBuilder.getExprBuilder());
Builder.GetInsertBlock()->getTerminator()->setOperand(0, RTC);
- Builder.SetInsertPoint(StartBlock->begin());
+ Builder.SetInsertPoint(&StartBlock->front());
NodeBuilder.create(AstRoot);
diff --git a/polly/lib/CodeGen/IslExprBuilder.cpp b/polly/lib/CodeGen/IslExprBuilder.cpp
index 8faaeafe33a..5e037e215cc 100644
--- a/polly/lib/CodeGen/IslExprBuilder.cpp
+++ b/polly/lib/CodeGen/IslExprBuilder.cpp
@@ -157,7 +157,7 @@ Value *IslExprBuilder::createAccessAddress(isl_ast_expr *Expr) {
DimSCEV = SCEVParameterRewriter::rewrite(DimSCEV, SE, Map);
Value *DimSize =
expandCodeFor(S, SE, DL, "polly", DimSCEV, DimSCEV->getType(),
- Builder.GetInsertPoint());
+ &*Builder.GetInsertPoint());
Type *Ty = getWidestType(DimSize->getType(), IndexOp->getType());
@@ -495,7 +495,7 @@ IslExprBuilder::createOpBooleanConditional(__isl_take isl_ast_expr *Expr) {
auto InsertBB = Builder.GetInsertBlock();
auto InsertPoint = Builder.GetInsertPoint();
- auto NextBB = SplitBlock(InsertBB, InsertPoint, &DT, &LI);
+ auto NextBB = SplitBlock(InsertBB, &*InsertPoint, &DT, &LI);
BasicBlock *CondBB = BasicBlock::Create(Context, "polly.cond", F);
LI.changeLoopFor(CondBB, LI.getLoopFor(InsertBB));
DT.addNewBlock(CondBB, InsertBB);
diff --git a/polly/lib/CodeGen/IslNodeBuilder.cpp b/polly/lib/CodeGen/IslNodeBuilder.cpp
index 6dc1678c6cf..1942d9d35c0 100644
--- a/polly/lib/CodeGen/IslNodeBuilder.cpp
+++ b/polly/lib/CodeGen/IslNodeBuilder.cpp
@@ -475,7 +475,7 @@ void IslNodeBuilder::createForSequential(__isl_take isl_ast_node *For) {
IDToValue.erase(IDToValue.find(IteratorID));
- Builder.SetInsertPoint(ExitBlock->begin());
+ Builder.SetInsertPoint(&ExitBlock->front());
isl_ast_node_free(For);
isl_ast_expr_free(Iterator);
@@ -538,10 +538,10 @@ void IslNodeBuilder::createForParallel(__isl_take isl_ast_node *For) {
// The preamble of parallel code interacts different than normal code with
// e.g., scalar initialization. Therefore, we ensure the parallel code is
// separated from the last basic block.
- BasicBlock *ParBB =
- SplitBlock(Builder.GetInsertBlock(), Builder.GetInsertPoint(), &DT, &LI);
+ BasicBlock *ParBB = SplitBlock(Builder.GetInsertBlock(),
+ &*Builder.GetInsertPoint(), &DT, &LI);
ParBB->setName("polly.parallel.for");
- Builder.SetInsertPoint(ParBB->begin());
+ Builder.SetInsertPoint(&ParBB->front());
Body = isl_ast_node_for_get_body(For);
Init = isl_ast_node_for_get_init(For);
@@ -597,7 +597,7 @@ void IslNodeBuilder::createForParallel(__isl_take isl_ast_node *For) {
IV = ParallelLoopGen.createParallelLoop(ValueLB, ValueUB, ValueInc,
SubtreeValues, NewValues, &LoopBody);
BasicBlock::iterator AfterLoop = Builder.GetInsertPoint();
- Builder.SetInsertPoint(LoopBody);
+ Builder.SetInsertPoint(&*LoopBody);
// Save the current values.
auto ValueMapCopy = ValueMap;
@@ -620,7 +620,7 @@ void IslNodeBuilder::createForParallel(__isl_take isl_ast_node *For) {
ValueMap = ValueMapCopy;
IDToValue = IDToValueCopy;
- Builder.SetInsertPoint(AfterLoop);
+ Builder.SetInsertPoint(&*AfterLoop);
removeSubFuncFromDomTree((*LoopBody).getParent()->getParent(), DT);
for (const Loop *L : Loops)
@@ -656,10 +656,10 @@ void IslNodeBuilder::createIf(__isl_take isl_ast_node *If) {
Function *F = Builder.GetInsertBlock()->getParent();
LLVMContext &Context = F->getContext();
- BasicBlock *CondBB =
- SplitBlock(Builder.GetInsertBlock(), Builder.GetInsertPoint(), &DT, &LI);
+ BasicBlock *CondBB = SplitBlock(Builder.GetInsertBlock(),
+ &*Builder.GetInsertPoint(), &DT, &LI);
CondBB->setName("polly.cond");
- BasicBlock *MergeBB = SplitBlock(CondBB, CondBB->begin(), &DT, &LI);
+ BasicBlock *MergeBB = SplitBlock(CondBB, &CondBB->front(), &DT, &LI);
MergeBB->setName("polly.merge");
BasicBlock *ThenBB = BasicBlock::Create(Context, "polly.then", F);
BasicBlock *ElseBB = BasicBlock::Create(Context, "polly.else", F);
@@ -683,16 +683,16 @@ void IslNodeBuilder::createIf(__isl_take isl_ast_node *If) {
Builder.CreateBr(MergeBB);
Builder.SetInsertPoint(ElseBB);
Builder.CreateBr(MergeBB);
- Builder.SetInsertPoint(ThenBB->begin());
+ Builder.SetInsertPoint(&ThenBB->front());
create(isl_ast_node_if_get_then(If));
- Builder.SetInsertPoint(ElseBB->begin());
+ Builder.SetInsertPoint(&ElseBB->front());
if (isl_ast_node_if_has_else(If))
create(isl_ast_node_if_get_else(If));
- Builder.SetInsertPoint(MergeBB->begin());
+ Builder.SetInsertPoint(&MergeBB->front());
isl_ast_node_free(If);
}
@@ -885,10 +885,10 @@ Value *IslNodeBuilder::preloadInvariantLoad(const MemoryAccess &MA,
Cond = Builder.CreateIsNotNull(Cond);
BasicBlock *CondBB = SplitBlock(Builder.GetInsertBlock(),
- Builder.GetInsertPoint(), &DT, &LI);
+ &*Builder.GetInsertPoint(), &DT, &LI);
CondBB->setName("polly.preload.cond");
- BasicBlock *MergeBB = SplitBlock(CondBB, CondBB->begin(), &DT, &LI);
+ BasicBlock *MergeBB = SplitBlock(CondBB, &CondBB->front(), &DT, &LI);
MergeBB->setName("polly.preload.merge");
Function *F = Builder.GetInsertBlock()->getParent();
@@ -979,7 +979,7 @@ void IslNodeBuilder::preloadInvariantEquivClass(
BasicBlock *EntryBB = &Builder.GetInsertBlock()->getParent()->getEntryBlock();
auto *Alloca = new AllocaInst(AccInstTy, AccInst->getName() + ".preload.s2a");
- Alloca->insertBefore(EntryBB->getFirstInsertionPt());
+ Alloca->insertBefore(&*EntryBB->getFirstInsertionPt());
Builder.CreateStore(PreloadVal, Alloca);
const Region &R = S.getRegion();
@@ -1007,10 +1007,10 @@ void IslNodeBuilder::preloadInvariantLoads() {
if (InvariantEquivClasses.empty())
return;
- BasicBlock *PreLoadBB =
- SplitBlock(Builder.GetInsertBlock(), Builder.GetInsertPoint(), &DT, &LI);
+ BasicBlock *PreLoadBB = SplitBlock(Builder.GetInsertBlock(),
+ &*Builder.GetInsertPoint(), &DT, &LI);
PreLoadBB->setName("polly.preload.begin");
- Builder.SetInsertPoint(PreLoadBB->begin());
+ Builder.SetInsertPoint(&PreLoadBB->front());
for (const auto &IAClass : InvariantEquivClasses)
preloadInvariantEquivClass(IAClass);
@@ -1046,7 +1046,7 @@ void IslNodeBuilder::addParameters(__isl_take isl_set *Context) {
}
Value *IslNodeBuilder::generateSCEV(const SCEV *Expr) {
- Instruction *InsertLocation = --(Builder.GetInsertBlock()->end());
+ Instruction *InsertLocation = &*--(Builder.GetInsertBlock()->end());
return expandCodeFor(S, SE, DL, "polly", Expr, Expr->getType(),
InsertLocation, &ValueMap);
}
diff --git a/polly/lib/CodeGen/LoopGenerators.cpp b/polly/lib/CodeGen/LoopGenerators.cpp
index 74f19a8cffa..195e11df636 100644
--- a/polly/lib/CodeGen/LoopGenerators.cpp
+++ b/polly/lib/CodeGen/LoopGenerators.cpp
@@ -92,7 +92,7 @@ Value *polly::createLoop(Value *LB, Value *UB, Value *Stride,
Annotator->pushLoop(NewLoop, Parallel);
// ExitBB
- ExitBB = SplitBlock(BeforeBB, Builder.GetInsertPoint()++, &DT, &LI);
+ ExitBB = SplitBlock(BeforeBB, &*Builder.GetInsertPoint(), &DT, &LI);
ExitBB->setName("polly.loop_exit");
// BeforeBB
@@ -153,7 +153,7 @@ Value *ParallelLoopGenerator::createParallelLoop(
BasicBlock::iterator BeforeLoop = Builder.GetInsertPoint();
Value *IV = createSubFn(Stride, Struct, UsedValues, Map, &SubFn);
*LoopBody = Builder.GetInsertPoint();
- Builder.SetInsertPoint(BeforeLoop);
+ Builder.SetInsertPoint(&*BeforeLoop);
Value *SubFnParam = Builder.CreateBitCast(Struct, Builder.getInt8PtrTy(),
"polly.par.userContext");
@@ -287,7 +287,7 @@ ParallelLoopGenerator::storeValuesIntoStruct(SetVector<Value *> &Values) {
// in the entry block of the function and use annotations to denote the actual
// live span (similar to clang).
BasicBlock &EntryBB = Builder.GetInsertBlock()->getParent()->getEntryBlock();
- Instruction *IP = EntryBB.getFirstInsertionPt();
+ Instruction *IP = &*EntryBB.getFirstInsertionPt();
StructType *Ty = StructType::get(Builder.getContext(), Members);
AllocaInst *Struct = new AllocaInst(Ty, 0, "polly.par.userContext", IP);
@@ -340,8 +340,8 @@ Value *ParallelLoopGenerator::createSubFn(Value *Stride, AllocaInst *StructData,
Builder.SetInsertPoint(HeaderBB);
LBPtr = Builder.CreateAlloca(LongType, 0, "polly.par.LBPtr");
UBPtr = Builder.CreateAlloca(LongType, 0, "polly.par.UBPtr");
- UserContext = Builder.CreateBitCast(SubFn->arg_begin(), StructData->getType(),
- "polly.par.userContext");
+ UserContext = Builder.CreateBitCast(
+ &*SubFn->arg_begin(), StructData->getType(), "polly.par.userContext");
extractValuesFromStruct(Data, StructData->getAllocatedType(), UserContext,
Map);
@@ -365,7 +365,7 @@ Value *ParallelLoopGenerator::createSubFn(Value *Stride, AllocaInst *StructData,
"polly.par.UBAdjusted");
Builder.CreateBr(CheckNextBB);
- Builder.SetInsertPoint(--Builder.GetInsertPoint());
+ Builder.SetInsertPoint(&*--Builder.GetInsertPoint());
IV = createLoop(LB, UB, Stride, Builder, P, LI, DT, AfterBB,
ICmpInst::ICMP_SLE, nullptr, true, /* UseGuard */ false);
@@ -376,7 +376,7 @@ Value *ParallelLoopGenerator::createSubFn(Value *Stride, AllocaInst *StructData,
createCallCleanupThread();
Builder.CreateRetVoid();
- Builder.SetInsertPoint(LoopBody);
+ Builder.SetInsertPoint(&*LoopBody);
*SubFnPtr = SubFn;
return IV;
diff --git a/polly/lib/CodeGen/RuntimeDebugBuilder.cpp b/polly/lib/CodeGen/RuntimeDebugBuilder.cpp
index 29f113dbd0c..96dab502248 100644
--- a/polly/lib/CodeGen/RuntimeDebugBuilder.cpp
+++ b/polly/lib/CodeGen/RuntimeDebugBuilder.cpp
@@ -174,7 +174,7 @@ void RuntimeDebugBuilder::createGPUPrinterT(PollyIRBuilder &Builder,
auto T = ArrayType::get(Builder.getInt32Ty(), ToPrint.size() * 2);
Value *Data = new AllocaInst(
T, "polly.vprint.buffer",
- Builder.GetInsertBlock()->getParent()->getEntryBlock().begin());
+ &Builder.GetInsertBlock()->getParent()->getEntryBlock().front());
auto *DataPtr = Builder.CreateGEP(Data, {Zero, Zero});
int Offset = 0;
diff --git a/polly/lib/Support/ScopHelper.cpp b/polly/lib/Support/ScopHelper.cpp
index b17ffdc91a4..b85e8f96e58 100644
--- a/polly/lib/Support/ScopHelper.cpp
+++ b/polly/lib/Support/ScopHelper.cpp
@@ -224,7 +224,7 @@ void polly::splitEntryBlockForAlloca(BasicBlock *EntryBlock, Pass *P) {
RegionInfo *RI = RIP ? &RIP->getRegionInfo() : nullptr;
// splitBlock updates DT, LI and RI.
- splitBlock(EntryBlock, I, DT, LI, RI);
+ splitBlock(EntryBlock, &*I, DT, LI, RI);
}
/// The SCEVExpander will __not__ generate any code for an existing SDiv/SRem
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