llvm::InnerLoopVectorizer Class Reference

InnerLoopVectorizer vectorizes loops which contain only one basic block to a specified vectorization factor (VF). More...

Inheritance diagram for llvm::InnerLoopVectorizer:

Collaboration diagram for llvm::InnerLoopVectorizer:

Public Types
using	VectorParts = SmallVector< Value *, 2 >
	A type for vectorized values in the new loop. More...

Public Member Functions
	InnerLoopVectorizer (Loop *OrigLoop, PredicatedScalarEvolution &PSE, LoopInfo *LI, DominatorTree *DT, const TargetLibraryInfo *TLI, const TargetTransformInfo *TTI, AssumptionCache *AC, OptimizationRemarkEmitter *ORE, ElementCount VecWidth, unsigned UnrollFactor, LoopVectorizationLegality *LVL, LoopVectorizationCostModel *CM, BlockFrequencyInfo *BFI, ProfileSummaryInfo *PSI, GeneratedRTChecks &RTChecks)
virtual	~InnerLoopVectorizer ()=default
virtual BasicBlock *	createVectorizedLoopSkeleton ()
	Create a new empty loop that will contain vectorized instructions later on, while the old loop will be used as the scalar remainder. More...
void	widenInstruction (Instruction &I, VPValue *Def, VPUser &Operands, VPTransformState &State)
	Widen a single instruction within the innermost loop. More...
void	widenCallInstruction (CallInst &I, VPValue *Def, VPUser &ArgOperands, VPTransformState &State)
	Widen a single call instruction within the innermost loop. More...
void	widenSelectInstruction (SelectInst &I, VPValue *VPDef, VPUser &Operands, bool InvariantCond, VPTransformState &State)
	Widen a single select instruction within the innermost loop. More...
void	fixVectorizedLoop (VPTransformState &State)
	Fix the vectorized code, taking care of header phi's, live-outs, and more. More...
bool	areSafetyChecksAdded ()
void	widenGEP (GetElementPtrInst *GEP, VPValue *VPDef, VPUser &Indices, unsigned UF, ElementCount VF, bool IsPtrLoopInvariant, SmallBitVector &IsIndexLoopInvariant, VPTransformState &State)
	Vectorize a single GetElementPtrInst based on information gathered and decisions taken during planning. More...
void	widenPHIInstruction (Instruction *PN, RecurrenceDescriptor *RdxDesc, VPWidenPHIRecipe *PhiR, VPTransformState &State)
	Vectorize a single PHINode in a block. More...
void	scalarizeInstruction (Instruction *Instr, VPValue *Def, VPUser &Operands, const VPIteration &Instance, bool IfPredicateInstr, VPTransformState &State)
	A helper function to scalarize a single Instruction in the innermost loop. More...
void	widenIntOrFpInduction (PHINode *IV, Value *Start, TruncInst *Trunc, VPValue *Def, VPValue *CastDef, VPTransformState &State)
	Widen an integer or floating-point induction variable IV. More...
void	packScalarIntoVectorValue (VPValue *Def, const VPIteration &Instance, VPTransformState &State)
	Construct the vector value of a scalarized value V one lane at a time. More...
void	vectorizeInterleaveGroup (const InterleaveGroup< Instruction > *Group, ArrayRef< VPValue * > VPDefs, VPTransformState &State, VPValue *Addr, ArrayRef< VPValue * > StoredValues, VPValue *BlockInMask=nullptr)
	Try to vectorize interleaved access group Group with the base address given in Addr, optionally masking the vector operations if BlockInMask is non-null. More...
void	vectorizeMemoryInstruction (Instruction *Instr, VPTransformState &State, VPValue *Def, VPValue *Addr, VPValue *StoredValue, VPValue *BlockInMask)
	Vectorize Load and Store instructions with the base address given in Addr, optionally masking the vector operations if BlockInMask is non-null. More...
void	setDebugLocFromInst (IRBuilder<> &B, const Value *Ptr)
	Set the debug location in the builder using the debug location in the instruction. More...
void	fixNonInductionPHIs (VPTransformState &State)
	Fix the non-induction PHIs in the OrigPHIsToFix vector. More...
virtual Value *	getBroadcastInstrs (Value *V)
	Create a broadcast instruction. More...

Protected Types
using	PhiVector = SmallVector< PHINode *, 4 >
	A small list of PHINodes. More...
using	ScalarParts = SmallVector< SmallVector< Value *, 4 >, 2 >
	A type for scalarized values in the new loop. More...

Protected Member Functions
void	fixupIVUsers (PHINode *OrigPhi, const InductionDescriptor &II, Value *CountRoundDown, Value *EndValue, BasicBlock *MiddleBlock)
	Set up the values of the IVs correctly when exiting the vector loop. More...
PHINode *	createInductionVariable (Loop *L, Value *Start, Value *End, Value *Step, Instruction *DL)
	Create a new induction variable inside L. More...
void	fixCrossIterationPHIs (VPTransformState &State)
	Handle all cross-iteration phis in the header. More...
void	fixFirstOrderRecurrence (PHINode *Phi, VPTransformState &State)
	Fix a first-order recurrence. More...
void	fixReduction (PHINode *Phi, VPTransformState &State)
	Fix a reduction cross-iteration phi. More...
void	clearReductionWrapFlags (RecurrenceDescriptor &RdxDesc, VPTransformState &State)
	Clear NSW/NUW flags from reduction instructions if necessary. More...
void	fixLCSSAPHIs (VPTransformState &State)
	Fixup the LCSSA phi nodes in the unique exit block. More...
void	sinkScalarOperands (Instruction *PredInst)
	Iteratively sink the scalarized operands of a predicated instruction into the block that was created for it. More...
void	truncateToMinimalBitwidths (VPTransformState &State)
	Shrinks vector element sizes to the smallest bitwidth they can be legally represented as. More...
virtual Value *	getStepVector (Value *Val, int StartIdx, Value *Step, Instruction::BinaryOps Opcode=Instruction::BinaryOpsEnd)
	This function adds (StartIdx * Step, (StartIdx + 1) * Step, (StartIdx + 2) * Step, ...) to each vector element of Val. More...
void	buildScalarSteps (Value *ScalarIV, Value *Step, Instruction *EntryVal, const InductionDescriptor &ID, VPValue *Def, VPValue *CastDef, VPTransformState &State)
	Compute scalar induction steps. More...
void	createVectorIntOrFpInductionPHI (const InductionDescriptor &II, Value *Step, Value *Start, Instruction *EntryVal, VPValue *Def, VPValue *CastDef, VPTransformState &State)
	Create a vector induction phi node based on an existing scalar one. More...
bool	shouldScalarizeInstruction (Instruction *I) const
	Returns true if an instruction I should be scalarized instead of vectorized for the chosen vectorization factor. More...
bool	needsScalarInduction (Instruction *IV) const
	Returns true if we should generate a scalar version of IV. More...
void	recordVectorLoopValueForInductionCast (const InductionDescriptor &ID, const Instruction *EntryVal, Value *VectorLoopValue, VPValue *CastDef, VPTransformState &State, unsigned Part, unsigned Lane=UINT_MAX)
	If there is a cast involved in the induction variable ID, which should be ignored in the vectorized loop body, this function records the VectorLoopValue of the respective Phi also as the VectorLoopValue of the cast. More...
virtual Value *	reverseVector (Value *Vec)
	Generate a shuffle sequence that will reverse the vector Vec. More...
Value *	getOrCreateTripCount (Loop *NewLoop)
	Returns (and creates if needed) the original loop trip count. More...
Value *	getOrCreateVectorTripCount (Loop *NewLoop)
	Returns (and creates if needed) the trip count of the widened loop. More...
Value *	createBitOrPointerCast (Value *V, VectorType *DstVTy, const DataLayout &DL)
	Returns a bitcasted value to the requested vector type. More...
void	emitMinimumIterationCountCheck (Loop *L, BasicBlock *Bypass)
	Emit a bypass check to see if the vector trip count is zero, including if it overflows. More...
BasicBlock *	emitSCEVChecks (Loop *L, BasicBlock *Bypass)
	Emit a bypass check to see if all of the SCEV assumptions we've had to make are correct. More...
BasicBlock *	emitMemRuntimeChecks (Loop *L, BasicBlock *Bypass)
	Emit bypass checks to check any memory assumptions we may have made. More...
Value *	emitTransformedIndex (IRBuilder<> &B, Value *Index, ScalarEvolution *SE, const DataLayout &DL, const InductionDescriptor &ID) const
	Compute the transformed value of Index at offset StartValue using step StepValue. More...
Loop *	createVectorLoopSkeleton (StringRef Prefix)
	Emit basic blocks (prefixed with Prefix) for the iteration check, vector loop preheader, middle block and scalar preheader. More...
void	createInductionResumeValues (Loop *L, Value *VectorTripCount, std::pair< BasicBlock *, Value * > AdditionalBypass={nullptr, nullptr})
	Create new phi nodes for the induction variables to resume iteration count in the scalar epilogue, from where the vectorized loop left off (given by VectorTripCount). More...
BasicBlock *	completeLoopSkeleton (Loop *L, MDNode *OrigLoopID)
	Complete the loop skeleton by adding debug MDs, creating appropriate conditional branches in the middle block, preparing the builder and running the verifier. More...
void	addNewMetadata (Instruction *To, const Instruction *Orig)
	Add additional metadata to To that was not present on Orig. More...
void	addMetadata (Instruction *To, Instruction *From)
	Add metadata from one instruction to another. More...
void	addMetadata (ArrayRef< Value * > To, Instruction *From)
	Similar to the previous function but it adds the metadata to a vector of instructions. More...
virtual void	printDebugTracesAtStart ()
	Allow subclasses to override and print debug traces before/after vplan execution, when trace information is requested. More...
virtual void	printDebugTracesAtEnd ()

Protected Attributes
Loop *	OrigLoop
	The original loop. More...
PredicatedScalarEvolution &	PSE
	A wrapper around ScalarEvolution used to add runtime SCEV checks. More...
LoopInfo *	LI
	Loop Info. More...
DominatorTree *	DT
	Dominator Tree. More...
AAResults *	AA
	Alias Analysis. More...
const TargetLibraryInfo *	TLI
	Target Library Info. More...
const TargetTransformInfo *	TTI
	Target Transform Info. More...
AssumptionCache *	AC
	Assumption Cache. More...
OptimizationRemarkEmitter *	ORE
	Interface to emit optimization remarks. More...
std::unique_ptr< LoopVersioning >	LVer
	LoopVersioning. More...
ElementCount	VF
	The vectorization SIMD factor to use. More...
unsigned	UF
	The vectorization unroll factor to use. More...
IRBuilder	Builder
	The builder that we use. More...
BasicBlock *	LoopVectorPreHeader
	The vector-loop preheader. More...
BasicBlock *	LoopScalarPreHeader
	The scalar-loop preheader. More...
BasicBlock *	LoopMiddleBlock
	Middle Block between the vector and the scalar. More...
BasicBlock *	LoopExitBlock
	The (unique) ExitBlock of the scalar loop. More...
BasicBlock *	LoopVectorBody
	The vector loop body. More...
BasicBlock *	LoopScalarBody
	The scalar loop body. More...
SmallVector< BasicBlock *, 4 >	LoopBypassBlocks
	A list of all bypass blocks. The first block is the entry of the loop. More...
PHINode *	Induction = nullptr
	The new Induction variable which was added to the new block. More...
PHINode *	OldInduction = nullptr
	The induction variable of the old basic block. More...
SmallVector< Instruction *, 4 >	PredicatedInstructions
	Store instructions that were predicated. More...
Value *	TripCount = nullptr
	Trip count of the original loop. More...
Value *	VectorTripCount = nullptr
	Trip count of the widened loop (TripCount - TripCount % (VF*UF)) More...
LoopVectorizationLegality *	Legal
	The legality analysis. More...
LoopVectorizationCostModel *	Cost
	The profitablity analysis. More...
bool	AddedSafetyChecks = false
DenseMap< PHINode *, Value * >	IVEndValues
SmallVector< PHINode *, 8 >	OrigPHIsToFix
BlockFrequencyInfo *	BFI
	BFI and PSI are used to check for profile guided size optimizations. More...
ProfileSummaryInfo *	PSI
bool	OptForSizeBasedOnProfile
GeneratedRTChecks &	RTChecks
	Structure to hold information about generated runtime checks, responsible for cleaning the checks, if vectorization turns out unprofitable. More...

Friends
class	LoopVectorizationPlanner

Detailed Description

InnerLoopVectorizer vectorizes loops which contain only one basic block to a specified vectorization factor (VF).

This class performs the widening of scalars into vectors, or multiple scalars. This class also implements the following features:

• It inserts an epilogue loop for handling loops that don't have iteration counts that are known to be a multiple of the vectorization factor.
• It handles the code generation for reduction variables.
• Scalarization (implementation using scalars) of un-vectorizable instructions. InnerLoopVectorizer does not perform any vectorization-legality checks, and relies on the caller to check for the different legality aspects. The InnerLoopVectorizer relies on the LoopVectorizationLegality class to provide information about the induction and reduction variables that were found to a given vectorization factor.

Definition at line 454 of file LoopVectorize.cpp.

Member Typedef Documentation

PhiVector

using llvm::InnerLoopVectorizer::PhiVector = SmallVector<PHINode *, 4>

protected

A small list of PHINodes.

Definition at line 576 of file LoopVectorize.cpp.

ScalarParts

using llvm::InnerLoopVectorizer::ScalarParts = SmallVector<SmallVector<Value *, 4>, 2>

protected

A type for scalarized values in the new loop.

Each value from the original loop, when scalarized, is represented by UF x VF scalar values in the new unrolled loop, where UF is the unroll factor and VF is the vectorization factor.

Definition at line 582 of file LoopVectorize.cpp.

VectorParts

using llvm::InnerLoopVectorizer::VectorParts = SmallVector<Value *, 2>

A type for vectorized values in the new loop.

Each value from the original loop, when vectorized, is represented by UF vector values in the new unrolled loop, where UF is the unroll factor.

Definition at line 506 of file LoopVectorize.cpp.

Constructor & Destructor Documentation

InnerLoopVectorizer()

llvm::InnerLoopVectorizer::InnerLoopVectorizer ( Loop *  OrigLoop, PredicatedScalarEvolution &  PSE, LoopInfo *  LI, DominatorTree *  DT, const TargetLibraryInfo *  TLI, const TargetTransformInfo *  TTI, AssumptionCache *  AC, OptimizationRemarkEmitter *  ORE, ElementCount  VecWidth, unsigned  UnrollFactor, LoopVectorizationLegality *  LVL, LoopVectorizationCostModel *  CM, BlockFrequencyInfo *  BFI, ProfileSummaryInfo *  PSI, GeneratedRTChecks &  RTChecks  )

inline

Definition at line 456 of file LoopVectorize.cpp.

References BFI, llvm::LoopBase< BlockT, LoopT >::getHeader(), llvm::IRPass, OptForSizeBasedOnProfile, OrigLoop, PSI, and llvm::shouldOptimizeForSize().

~InnerLoopVectorizer()

virtual llvm::InnerLoopVectorizer::~InnerLoopVectorizer ( )

virtualdefault

Member Function Documentation

addMetadata() [1/2]

void InnerLoopVectorizer::addMetadata ( ArrayRef< Value * >  To, Instruction *  From  )

protected

Similar to the previous function but it adds the metadata to a vector of instructions.

Definition at line 1167 of file LoopVectorize.cpp.

References addMetadata(), From, and I.

addMetadata() [2/2]

void InnerLoopVectorizer::addMetadata ( Instruction *  To, Instruction *  From  )

protected

Add metadata from one instruction to another.

This includes both the original MDs from From and additional ones (

See also

addNewMetadata). Use this for newly created instructions in the vector loop.

Definition at line 1161 of file LoopVectorize.cpp.

References addNewMetadata(), From, and llvm::propagateMetadata().

Referenced by addMetadata(), vectorizeMemoryInstruction(), widenCallInstruction(), widenGEP(), widenInstruction(), and widenSelectInstruction().

addNewMetadata()

void InnerLoopVectorizer::addNewMetadata ( Instruction *  To, const Instruction *  Orig  )

protected

Add additional metadata to To that was not present on Orig.

Currently this is used to add the noalias annotations based on the inserted memchecks. Use this for instructions that are cloned into the vector loop.

Definition at line 1153 of file LoopVectorize.cpp.

References LVer.

Referenced by addMetadata(), and scalarizeInstruction().

areSafetyChecksAdded()

bool llvm::InnerLoopVectorizer::areSafetyChecksAdded ( )

inline

Definition at line 501 of file LoopVectorize.cpp.

References AddedSafetyChecks.

Referenced by llvm::LoopVectorizePass::processLoop().

buildScalarSteps()

void InnerLoopVectorizer::buildScalarSteps ( Value *  ScalarIV, Value *  Step, Instruction *  EntryVal, const InductionDescriptor &  ID, VPValue *  Def, VPValue *  CastDef, VPTransformState &  State  )

protected

Compute scalar induction steps.

ScalarIV is the scalar induction variable on which to base the steps, Step is the size of the step, and EntryVal is the value from the original loop that maps to the steps. Note that EntryVal doesn't have to be an induction variable - it can also be a truncate instruction.

Definition at line 2520 of file LoopVectorize.cpp.

References llvm::MCID::Add, assert(), Builder, Cost, llvm::IRBuilderBase::CreateAdd(), llvm::IRBuilderBase::CreateBinOp(), llvm::IRBuilderBase::CreateSIToFP(), createStepForVF(), llvm::IRBuilderBase::CreateStepVector(), llvm::IRBuilderBase::CreateVectorSplat(), llvm::tgtok::Def, llvm::IntegerType::get(), llvm::ConstantInt::get(), llvm::VectorType::get(), llvm::Type::getContext(), llvm::LinearPolySize< LeafTy >::getKnownMinValue(), llvm::Type::getScalarSizeInBits(), llvm::Type::getScalarType(), getSignedIntOrFpConstant(), llvm::Value::getType(), llvm::Type::isFloatingPointTy(), llvm::Type::isIntegerTy(), llvm::LinearPolySize< LeafTy >::isScalable(), llvm::LoopVectorizationCostModel::isUniformAfterVectorization(), llvm::ElementCount::isVector(), llvm::Mul, recordVectorLoopValueForInductionCast(), llvm::VPTransformState::set(), UF, and VF.

clearReductionWrapFlags()

void InnerLoopVectorizer::clearReductionWrapFlags ( RecurrenceDescriptor &  RdxDesc, VPTransformState &  State  )

protected

Clear NSW/NUW flags from reduction instructions if necessary.

Definition at line 4451 of file LoopVectorize.cpp.

References llvm::Add, assert(), llvm::LoopBase< BlockT, LoopT >::contains(), llvm::VPTransformState::get(), llvm::RecurrenceDescriptor::getLoopExitInstr(), llvm::Instruction::getParent(), llvm::RecurrenceDescriptor::getRecurrenceKind(), llvm::VPlan::getVPValue(), llvm::SmallPtrSetImpl< PtrType >::insert(), llvm::Mul, OrigLoop, llvm::VPTransformState::Plan, llvm::SmallVectorImpl< T >::pop_back_val(), UF, and llvm::Value::users().

Referenced by fixReduction().

completeLoopSkeleton()

BasicBlock * InnerLoopVectorizer::completeLoopSkeleton ( Loop *  L, MDNode *  OrigLoopID  )

protected

Complete the loop skeleton by adding debug MDs, creating appropriate conditional branches in the middle block, preparing the builder and running the verifier.

Take in the vector loop L as argument, and return the preheader of the completed vector loop.

Definition at line 3514 of file LoopVectorize.cpp.

References assert(), Builder, Cost, llvm::CmpInst::Create(), DT, llvm::CallingConv::Fast, llvm::LoopVectorizationCostModel::foldTailByMasking(), llvm::BasicBlock::getFirstInsertionPt(), llvm::Loop::getLoopID(), llvm::LoopBase< BlockT, LoopT >::getLoopLatch(), llvm::LoopBase< BlockT, LoopT >::getLoopPreheader(), getOrCreateTripCount(), getOrCreateVectorTripCount(), llvm::BasicBlock::getTerminator(), llvm::Optional< T >::getValue(), llvm::Optional< T >::hasValue(), llvm::CmpInst::ICMP_EQ, LI, LLVMLoopVectorizeFollowupAll, LLVMLoopVectorizeFollowupVectorized, LoopMiddleBlock, LoopVectorBody, LoopVectorPreHeader, llvm::makeFollowupLoopID(), ORE, OrigLoop, llvm::LoopVectorizeHints::setAlreadyVectorized(), llvm::Instruction::setDebugLoc(), llvm::IRBuilderBase::SetInsertPoint(), llvm::Loop::setLoopID(), VectorTripCount, llvm::DominatorTreeBase< NodeT, IsPostDom >::verify(), and llvm::LoopInfoBase< BlockT, LoopT >::verify().

Referenced by llvm::EpilogueVectorizerMainLoop::createEpilogueVectorizedLoopSkeleton(), llvm::EpilogueVectorizerEpilogueLoop::createEpilogueVectorizedLoopSkeleton(), and createVectorizedLoopSkeleton().

createBitOrPointerCast()

Value * InnerLoopVectorizer::createBitOrPointerCast ( Value *  V, VectorType *  DstVTy, const DataLayout &  DL  )

protected

Returns a bitcasted value to the requested vector type.

Also handles bitcasts of vector<float> <-> vector<pointer> types.

Definition at line 3164 of file LoopVectorize.cpp.

References assert(), Builder, llvm::IRBuilderBase::CreateBitOrPointerCast(), DL, llvm::FixedVectorType::get(), llvm::Value::getContext(), llvm::Type::getIntNTy(), llvm::Value::getType(), llvm::CastInst::isBitOrNoopPointerCastable(), llvm::Type::isFloatingPointTy(), llvm::Type::isPointerTy(), and VF.

Referenced by vectorizeInterleaveGroup().

createInductionResumeValues()

void InnerLoopVectorizer::createInductionResumeValues ( Loop *  L, Value *  VectorTripCount, std::pair< BasicBlock *, Value * >  AdditionalBypass = {nullptr, nullptr}  )

protected

Create new phi nodes for the induction variables to resume iteration count in the scalar epilogue, from where the vectorized loop left off (given by VectorTripCount).

In cases where the loop skeleton is more complicated (eg. epilogue vectorization) and the resume values can come from an additional bypass block, the AdditionalBypass pair provides information about the bypass block and the end value on the edge from bypass to this loop.

Definition at line 3440 of file LoopVectorize.cpp.

References llvm::PHINode::addIncoming(), assert(), B, BB, llvm::PHINode::Create(), DL, emitTransformedIndex(), llvm::CastInst::getCastOpcode(), llvm::Module::getDataLayout(), llvm::Instruction::getDebugLoc(), llvm::Instruction::getFastMathFlags(), llvm::InductionDescriptor::getInductionBinOp(), llvm::LoopVectorizationLegality::getInductionVars(), llvm::LoopBase< BlockT, LoopT >::getLoopPreheader(), llvm::BasicBlock::getModule(), llvm::PredicatedScalarEvolution::getSE(), llvm::InductionDescriptor::getStartValue(), llvm::InductionDescriptor::getStep(), llvm::BasicBlock::getTerminator(), llvm::SCEV::getType(), llvm::Value::getType(), IVEndValues, Legal, LoopBypassBlocks, LoopMiddleBlock, LoopScalarBody, LoopScalarPreHeader, OldInduction, PSE, llvm::Instruction::setDebugLoc(), llvm::PHINode::setIncomingValueForBlock(), llvm::Value::setName(), and VectorTripCount.

Referenced by llvm::EpilogueVectorizerEpilogueLoop::createEpilogueVectorizedLoopSkeleton(), and createVectorizedLoopSkeleton().

createInductionVariable()

PHINode * InnerLoopVectorizer::createInductionVariable ( Loop *  L, Value *  Start, Value *  End, Value *  Step, Instruction *  DL  )

protected

Create a new induction variable inside L.

Definition at line 3031 of file LoopVectorize.cpp.

Referenced by llvm::EpilogueVectorizerMainLoop::createEpilogueVectorizedLoopSkeleton(), llvm::EpilogueVectorizerEpilogueLoop::createEpilogueVectorizedLoopSkeleton(), and createVectorizedLoopSkeleton().

createVectorIntOrFpInductionPHI()

void InnerLoopVectorizer::createVectorIntOrFpInductionPHI ( const InductionDescriptor &  II, Value *  Step, Value *  Start, Instruction *  EntryVal, VPValue *  Def, VPValue *  CastDef, VPTransformState &  State  )

protected

Create a vector induction phi node based on an existing scalar one.

EntryVal is the value from the original loop that maps to the vector phi node, and Step is the loop-invariant step. If EntryVal is a truncate instruction, instead of widening the original IV, we widen a version of the IV truncated to EntryVal's type.

Definition at line 2226 of file LoopVectorize.cpp.

createVectorizedLoopSkeleton()

BasicBlock * InnerLoopVectorizer::createVectorizedLoopSkeleton ( )

virtual

Create a new empty loop that will contain vectorized instructions later on, while the old loop will be used as the scalar remainder.

Control flow is generated around the vectorized (and scalar epilogue) loops consisting of various checks and bypasses. Return the pre-header block of the new loop. In the case of epilogue vectorization, this function is overriden to handle the more complex control flow around the loops.

Reimplemented in llvm::InnerLoopAndEpilogueVectorizer.

Definition at line 3573 of file LoopVectorize.cpp.

References Builder, completeLoopSkeleton(), createInductionResumeValues(), createInductionVariable(), createStepForVF(), createVectorLoopSkeleton(), emitMemRuntimeChecks(), llvm::EpilogueVectorizerMainLoop::emitMinimumIterationCountCheck(), emitSCEVChecks(), llvm::ConstantInt::get(), getDebugLocFromInstOrOperands(), llvm::BasicBlock::getFirstInsertionPt(), llvm::LoopBase< BlockT, LoopT >::getHeader(), llvm::Loop::getLoopID(), getOrCreateVectorTripCount(), llvm::LoopVectorizationLegality::getPrimaryInduction(), llvm::LoopVectorizationLegality::getWidestInductionType(), Induction, Legal, LoopScalarPreHeader, OldInduction, OrigLoop, llvm::IRBuilderBase::SetInsertPoint(), UF, and VF.

Referenced by llvm::LoopVectorizationPlanner::executePlan().

createVectorLoopSkeleton()

Loop * InnerLoopVectorizer::createVectorLoopSkeleton ( StringRef  Prefix )

protected

Emit basic blocks (prefixed with Prefix) for the iteration check, vector loop preheader, middle block and scalar preheader.

Also allocate a loop object for the new vector loop and return it.

Definition at line 3392 of file LoopVectorize.cpp.

References llvm::LoopBase< BlockT, LoopT >::addBasicBlockToLoop(), llvm::LoopBase< BlockT, LoopT >::addChildLoop(), llvm::LoopInfoBase< BlockT, LoopT >::addTopLevelLoop(), llvm::LoopInfoBase< BlockT, LoopT >::AllocateLoop(), assert(), Builder, llvm::DominatorTreeBase< NodeT, IsPostDom >::changeImmediateDominator(), llvm::BranchInst::Create(), DT, llvm::LoopBase< BlockT, LoopT >::getHeader(), llvm::LoopBase< BlockT, LoopT >::getLoopLatch(), llvm::LoopBase< BlockT, LoopT >::getLoopPreheader(), llvm::LoopBase< BlockT, LoopT >::getParentLoop(), llvm::BasicBlock::getTerminator(), llvm::IRBuilderBase::getTrue(), llvm::LoopBase< BlockT, LoopT >::getUniqueExitBlock(), LI, LoopExitBlock, LoopMiddleBlock, LoopScalarBody, LoopScalarPreHeader, LoopVectorBody, LoopVectorPreHeader, OrigLoop, llvm::cl::Prefix, llvm::ReplaceInstWithInst(), llvm::Instruction::setDebugLoc(), and llvm::SplitBlock().

Referenced by llvm::EpilogueVectorizerMainLoop::createEpilogueVectorizedLoopSkeleton(), llvm::EpilogueVectorizerEpilogueLoop::createEpilogueVectorizedLoopSkeleton(), and createVectorizedLoopSkeleton().

emitMemRuntimeChecks()

BasicBlock * InnerLoopVectorizer::emitMemRuntimeChecks ( Loop *  L, BasicBlock *  Bypass  )

protected

Emit bypass checks to check any memory assumptions we may have made.

Returns the block containing the checks or nullptr if no checks have been added.

Definition at line 3261 of file LoopVectorize.cpp.

References AddedSafetyChecks, assert(), Cost, DEBUG_TYPE, DT, llvm::OptimizationRemarkEmitter::emit(), GeneratedRTChecks::emitMemRuntimeChecks(), EnableVPlanNativePath, llvm::LoopVectorizeHints::FK_Enabled, llvm::RuntimePointerChecking::getChecks(), llvm::LoopVectorizeHints::getForce(), llvm::LoopBase< BlockT, LoopT >::getHeader(), llvm::LoopVectorizationLegality::getLAI(), llvm::BasicBlock::getParent(), llvm::LoopAccessInfo::getRuntimePointerChecking(), llvm::PredicatedScalarEvolution::getSE(), llvm::Loop::getStartLoc(), llvm::Function::hasOptSize(), llvm::LoopVectorizationCostModel::Hints, Legal, LI, LoopBypassBlocks, LoopVectorPreHeader, LVer, OptForSizeBasedOnProfile, ORE, OrigLoop, PSE, and RTChecks.

Referenced by llvm::EpilogueVectorizerMainLoop::createEpilogueVectorizedLoopSkeleton(), and createVectorizedLoopSkeleton().

emitMinimumIterationCountCheck()

void InnerLoopVectorizer::emitMinimumIterationCountCheck ( Loop *  L, BasicBlock *  Bypass  )

protected

Emit a bypass check to see if the vector trip count is zero, including if it overflows.

Definition at line 3195 of file LoopVectorize.cpp.

References assert(), Builder, llvm::DominatorTreeBase< NodeT, IsPostDom >::changeImmediateDominator(), Cost, llvm::BranchInst::Create(), llvm::IRBuilderBase::CreateICmp(), createStepForVF(), DT, llvm::LoopVectorizationCostModel::foldTailByMasking(), llvm::ConstantInt::get(), llvm::IRBuilderBase::getFalse(), llvm::DomTreeNodeBase< NodeT >::getIDom(), llvm::DominatorTreeBase< NodeT, IsPostDom >::getNode(), getOrCreateTripCount(), llvm::BasicBlock::getTerminator(), llvm::Value::getType(), llvm::CmpInst::ICMP_ULE, llvm::CmpInst::ICMP_ULT, LI, LoopBypassBlocks, LoopExitBlock, LoopVectorPreHeader, P, llvm::DominatorTreeBase< NodeT, IsPostDom >::properlyDominates(), llvm::ReplaceInstWithInst(), llvm::LoopVectorizationCostModel::requiresScalarEpilogue(), llvm::SplitBlock(), UF, and VF.

emitSCEVChecks()

BasicBlock * InnerLoopVectorizer::emitSCEVChecks ( Loop *  L, BasicBlock *  Bypass  )

protected

Emit a bypass check to see if all of the SCEV assumptions we've had to make are correct.

Returns the block containing the checks or nullptr if no checks have been added.

Definition at line 3237 of file LoopVectorize.cpp.

References AddedSafetyChecks, assert(), llvm::DominatorTreeBase< NodeT, IsPostDom >::changeImmediateDominator(), Cost, DT, GeneratedRTChecks::emitSCEVChecks(), llvm::LoopVectorizeHints::FK_Enabled, llvm::LoopVectorizeHints::getForce(), llvm::BasicBlock::getParent(), llvm::Function::hasOptSize(), llvm::LoopVectorizationCostModel::Hints, LoopBypassBlocks, LoopExitBlock, LoopVectorPreHeader, OptForSizeBasedOnProfile, and RTChecks.

Referenced by llvm::EpilogueVectorizerMainLoop::createEpilogueVectorizedLoopSkeleton(), and createVectorizedLoopSkeleton().

emitTransformedIndex()

Value * InnerLoopVectorizer::emitTransformedIndex ( IRBuilder<> &  B, Value *  Index, ScalarEvolution *  SE, const DataLayout &  DL, const InductionDescriptor &  ID  ) const

protected

Compute the transformed value of Index at offset StartValue using step StepValue.

For integer induction, returns StartValue + Index * StepValue. For pointer induction, returns StartValue[Index * StepValue]. FIXME: The newly created binary instructions should contain nsw/nuw flags, which can be found from the original scalar operations.

Definition at line 3304 of file LoopVectorize.cpp.

References assert(), B, CreateAdd(), CreateMul(), DL, llvm::LoopInfoBase< BlockT, LoopT >::getLoopFor(), llvm::BasicBlock::getTerminator(), llvm::InductionDescriptor::IK_FpInduction, llvm::InductionDescriptor::IK_IntInduction, llvm::InductionDescriptor::IK_NoInduction, llvm::InductionDescriptor::IK_PtrInduction, Index, LI, llvm_unreachable, LoopVectorBody, Offset, X, and Y.

Referenced by createInductionResumeValues(), fixupIVUsers(), and widenPHIInstruction().

fixCrossIterationPHIs()

void InnerLoopVectorizer::fixCrossIterationPHIs ( VPTransformState &  State )

protected

Handle all cross-iteration phis in the header.

Definition at line 4061 of file LoopVectorize.cpp.

References fixFirstOrderRecurrence(), fixReduction(), llvm::LoopBase< BlockT, LoopT >::getHeader(), llvm::LoopVectorizationLegality::isFirstOrderRecurrence(), llvm::LoopVectorizationLegality::isReductionVariable(), Legal, OrigLoop, and llvm::BasicBlock::phis().

Referenced by fixVectorizedLoop().

fixFirstOrderRecurrence()

void InnerLoopVectorizer::fixFirstOrderRecurrence ( PHINode *  Phi, VPTransformState &  State  )

protected

Fix a first-order recurrence.

This is the second phase of vectorizing this phi node.

Definition at line 4077 of file LoopVectorize.cpp.

References llvm::PHINode::addIncoming(), assert(), llvm::BasicBlock::begin(), Builder, llvm::IRBuilderBase::CreateExtractElement(), llvm::IRBuilderBase::CreateInsertElement(), llvm::IRBuilderBase::CreatePHI(), llvm::IRBuilderBase::CreateShuffleVector(), llvm::VPTransformState::get(), llvm::VectorType::get(), llvm::PoisonValue::get(), llvm::BasicBlock::getFirstInsertionPt(), llvm::PHINode::getIncomingValueForBlock(), llvm::IRBuilderBase::getInt32(), llvm::ilist_node_impl< OptionsT >::getIterator(), llvm::LinearPolySize< LeafTy >::getKnownMinValue(), llvm::LoopInfoBase< BlockT, LoopT >::getLoopFor(), llvm::LoopBase< BlockT, LoopT >::getLoopLatch(), llvm::LoopBase< BlockT, LoopT >::getLoopPreheader(), llvm::Instruction::getParent(), llvm::BasicBlock::getTerminator(), llvm::VPlan::getVPValue(), I, llvm::Loop::isLoopInvariant(), llvm::LinearPolySize< LeafTy >::isScalable(), llvm::ElementCount::isVector(), LI, LoopMiddleBlock, LoopScalarPreHeader, LoopVectorBody, LoopVectorPreHeader, OrigLoop, llvm::VPTransformState::Plan, llvm::Value::replaceAllUsesWith(), llvm::VPTransformState::reset(), llvm::IRBuilderBase::SetInsertPoint(), UF, and VF.

Referenced by fixCrossIterationPHIs().

fixLCSSAPHIs()

void InnerLoopVectorizer::fixLCSSAPHIs ( VPTransformState &  State )

protected

Fixup the LCSSA phi nodes in the unique exit block.

This simply means we need to add the appropriate incoming value from the middle block as exiting edges from the scalar epilogue loop (if present) are already in place, and we exit the vector loop exclusively to the middle block.

Definition at line 4481 of file LoopVectorize.cpp.

References Builder, Cost, llvm::VPTransformState::get(), llvm::VPLane::getFirstLane(), llvm::VPLane::getLastLaneForVF(), llvm::BasicBlock::getTerminator(), llvm::VPlan::getVPValue(), llvm::Loop::isLoopInvariant(), llvm::LoopVectorizationCostModel::isUniformAfterVectorization(), LoopExitBlock, LoopMiddleBlock, OrigLoop, llvm::BasicBlock::phis(), llvm::VPTransformState::Plan, llvm::IRBuilderBase::SetInsertPoint(), UF, and VF.

fixNonInductionPHIs()

void InnerLoopVectorizer::fixNonInductionPHIs

(

VPTransformState &

State

)

Fix the non-induction PHIs in the OrigPHIsToFix vector.

Definition at line 4573 of file LoopVectorize.cpp.

References llvm::PHINode::addIncoming(), Builder, llvm::VPTransformState::CFG, llvm::VPTransformState::get(), llvm::VPWidenPHIRecipe::getIncomingBlock(), llvm::VPWidenPHIRecipe::getIncomingValue(), llvm::VPUser::getNumOperands(), llvm::VPlan::getVPValue(), i, OrigPHIsToFix, llvm::VPTransformState::Plan, llvm::IRBuilderBase::SetInsertPoint(), and llvm::VPTransformState::CFGState::VPBB2IRBB.

Referenced by fixVectorizedLoop().

fixReduction()

void InnerLoopVectorizer::fixReduction ( PHINode *  Phi, VPTransformState &  State  )

protected

Fix a reduction cross-iteration phi.

This is the second phase of vectorizing this phi node.

Definition at line 4268 of file LoopVectorize.cpp.

References llvm::PHINode::addIncoming(), llvm::any_of(), assert(), Builder, clearReductionWrapFlags(), Cost, llvm::PHINode::Create(), llvm::IRBuilderBase::CreateBinOp(), llvm::createMinMaxOp(), llvm::IRBuilderBase::CreateSExt(), llvm::createTargetReduction(), llvm::IRBuilderBase::CreateTrunc(), llvm::IRBuilderBase::CreateZExt(), E, llvm::LoopVectorizationCostModel::foldTailByMasking(), llvm::VPTransformState::get(), llvm::VectorType::get(), llvm::PHINode::getBasicBlockIndex(), llvm::RecurrenceDescriptor::getFastMathFlags(), llvm::BasicBlock::getFirstInsertionPt(), llvm::PHINode::getIncomingValueForBlock(), llvm::RecurrenceDescriptor::getLoopExitInstr(), llvm::LoopInfoBase< BlockT, LoopT >::getLoopFor(), llvm::LoopBase< BlockT, LoopT >::getLoopLatch(), llvm::RecurrenceDescriptor::getOpcode(), llvm::RecurrenceDescriptor::getRecurrenceKind(), llvm::RecurrenceDescriptor::getRecurrenceStartValue(), llvm::RecurrenceDescriptor::getRecurrenceType(), llvm::LoopVectorizationLegality::getReductionVars(), llvm::BasicBlock::getTerminator(), llvm::Value::getType(), llvm::VPlan::getVPValue(), I, llvm::LoopVectorizationCostModel::isInLoopReduction(), llvm::LoopVectorizationLegality::isReductionVariable(), llvm::LinearPolySize< LeafTy >::isScalable(), llvm::RecurrenceDescriptor::isSigned(), llvm::ElementCount::isVector(), Legal, LI, LoopBypassBlocks, LoopExitBlock, LoopMiddleBlock, LoopScalarPreHeader, LoopVectorBody, OrigLoop, llvm::BasicBlock::phis(), llvm::VPTransformState::Plan, PreferPredicatedReductionSelect, llvm::TargetTransformInfo::preferPredicatedReductionSelect(), replaceUsesOfWith(), llvm::VPTransformState::reset(), setDebugLocFromInst(), llvm::IRBuilderBase::setFastMathFlags(), llvm::PHINode::setIncomingValue(), llvm::IRBuilderBase::SetInsertPoint(), UF, useOrderedReductions(), llvm::Value::users(), llvm::VPTransformState::VF, and VF.

Referenced by fixCrossIterationPHIs().

fixupIVUsers()

void InnerLoopVectorizer::fixupIVUsers ( PHINode *  OrigPhi, const InductionDescriptor &  II, Value *  CountRoundDown, Value *  EndValue, BasicBlock *  MiddleBlock  )

protected

Set up the values of the IVs correctly when exiting the vector loop.

Definition at line 3662 of file LoopVectorize.cpp.

References llvm::PHINode::addIncoming(), assert(), B, llvm::LoopBase< BlockT, LoopT >::contains(), DL, emitTransformedIndex(), llvm::ConstantInt::get(), llvm::PHINode::getBasicBlockIndex(), llvm::Module::getDataLayout(), llvm::Instruction::getFastMathFlags(), llvm::LoopBase< BlockT, LoopT >::getHeader(), llvm::PHINode::getIncomingValueForBlock(), llvm::InductionDescriptor::getInductionBinOp(), llvm::LoopBase< BlockT, LoopT >::getLoopLatch(), llvm::BasicBlock::getModule(), llvm::PredicatedScalarEvolution::getSE(), llvm::InductionDescriptor::getStep(), llvm::BasicBlock::getTerminator(), llvm::SCEV::getType(), llvm::Value::getType(), llvm::LoopBase< BlockT, LoopT >::getUniqueExitBlock(), I, llvm::Type::isIntegerTy(), OrigLoop, PostInc, PSE, llvm::Value::setName(), and llvm::Value::users().

fixVectorizedLoop()

void InnerLoopVectorizer::fixVectorizedLoop

(

VPTransformState &

State

)

Fix the vectorized code, taking care of header phi's, live-outs, and more.

Definition at line 4008 of file LoopVectorize.cpp.

References assert(), EnableVPlanNativePath, fixCrossIterationPHIs(), fixNonInductionPHIs(), llvm::ScalarEvolution::forgetLoop(), llvm::PredicatedScalarEvolution::getSE(), llvm::ElementCount::isVector(), OrigLoop, OrigPHIsToFix, PSE, truncateToMinimalBitwidths(), and VF.

Referenced by llvm::LoopVectorizationPlanner::executePlan().

getBroadcastInstrs()

Value * InnerLoopVectorizer::getBroadcastInstrs ( Value *  V )

virtual

Create a broadcast instruction.

This method generates a broadcast instruction (shuffle) for loop invariant values and for the induction value. If this is the induction variable then we extend it to N, N+1, ... this is needed because each iteration in the loop corresponds to a SIMD element.

Definition at line 2207 of file LoopVectorize.cpp.

References Builder, llvm::IRBuilderBase::CreateVectorSplat(), llvm::DominatorTree::dominates(), DT, llvm::Instruction::getParent(), llvm::BasicBlock::getTerminator(), llvm::Loop::isLoopInvariant(), LoopVectorPreHeader, OrigLoop, llvm::IRBuilderBase::SetInsertPoint(), and VF.

getOrCreateTripCount()

Value * InnerLoopVectorizer::getOrCreateTripCount ( Loop *  NewLoop )

protected

Returns (and creates if needed) the original loop trip count.

Definition at line 3063 of file LoopVectorize.cpp.

References assert(), Builder, llvm::CastInst::CreatePointerCast(), DL, llvm::ScalarEvolution::getAddExpr(), llvm::PredicatedScalarEvolution::getBackedgeTakenCount(), llvm::Module::getDataLayout(), llvm::LoopBase< BlockT, LoopT >::getHeader(), llvm::LoopBase< BlockT, LoopT >::getLoopPreheader(), llvm::BasicBlock::getModule(), llvm::ScalarEvolution::getNoopOrZeroExtend(), llvm::ScalarEvolution::getOne(), llvm::Type::getPrimitiveSizeInBits(), llvm::PredicatedScalarEvolution::getSE(), llvm::BasicBlock::getTerminator(), llvm::ScalarEvolution::getTruncateOrNoop(), llvm::SCEV::getType(), llvm::Value::getType(), llvm::ScalarEvolution::getTypeSizeInBits(), llvm::LoopVectorizationLegality::getWidestInductionType(), llvm::Type::isPointerTy(), Legal, PSE, and TripCount.

Referenced by completeLoopSkeleton(), emitMinimumIterationCountCheck(), llvm::EpilogueVectorizerMainLoop::emitMinimumIterationCountCheck(), llvm::LoopVectorizationPlanner::executePlan(), and getOrCreateVectorTripCount().

getOrCreateVectorTripCount()

Value * InnerLoopVectorizer::getOrCreateVectorTripCount ( Loop *  NewLoop )

protected

Returns (and creates if needed) the trip count of the widened loop.

Definition at line 3110 of file LoopVectorize.cpp.

References assert(), Builder, Cost, llvm::IRBuilderBase::CreateAdd(), llvm::IRBuilderBase::CreateICmpEQ(), llvm::IRBuilderBase::CreateSelect(), createStepForVF(), llvm::IRBuilderBase::CreateSub(), llvm::IRBuilderBase::CreateURem(), llvm::LoopVectorizationCostModel::foldTailByMasking(), llvm::ConstantInt::get(), llvm::LinearPolySize< LeafTy >::getKnownMinValue(), llvm::LoopBase< BlockT, LoopT >::getLoopPreheader(), getOrCreateTripCount(), llvm::BasicBlock::getTerminator(), llvm::Value::getType(), llvm::isPowerOf2_32(), llvm::LinearPolySize< LeafTy >::isScalable(), llvm::ElementCount::isVector(), llvm::LoopVectorizationCostModel::requiresScalarEpilogue(), UF, VectorTripCount, and VF.

Referenced by completeLoopSkeleton(), llvm::EpilogueVectorizerMainLoop::createEpilogueVectorizedLoopSkeleton(), llvm::EpilogueVectorizerEpilogueLoop::createEpilogueVectorizedLoopSkeleton(), and createVectorizedLoopSkeleton().

getStepVector()

Value * InnerLoopVectorizer::getStepVector ( Value *  Val, int  StartIdx, Value *  Step, Instruction::BinaryOps  Opcode = Instruction::BinaryOpsEnd  )

protectedvirtual

This function adds (StartIdx * Step, (StartIdx + 1) * Step, (StartIdx + 2) * Step, ...) to each vector element of Val.

The sequence starts at StartIndex. Opcode is relevant for FP induction variable.

Definition at line 2474 of file LoopVectorize.cpp.

References assert(), Builder, llvm::IRBuilderBase::CreateAdd(), llvm::IRBuilderBase::CreateBinOp(), llvm::IRBuilderBase::CreateFMul(), llvm::IRBuilderBase::CreateMul(), llvm::IRBuilderBase::CreateStepVector(), llvm::IRBuilderBase::CreateUIToFP(), llvm::IRBuilderBase::CreateVectorSplat(), llvm::IntegerType::get(), llvm::ConstantInt::get(), llvm::VectorType::get(), llvm::Type::getContext(), llvm::Type::getScalarSizeInBits(), llvm::Type::getScalarType(), llvm::Value::getType(), llvm::Type::isFloatingPointTy(), and llvm::Type::isIntegerTy().

needsScalarInduction()

bool InnerLoopVectorizer::needsScalarInduction ( Instruction *  IV ) const

protected

Returns true if we should generate a scalar version of IV.

Definition at line 2316 of file LoopVectorize.cpp.

References llvm::any_of(), llvm::LoopBase< BlockT, LoopT >::contains(), I, OrigLoop, shouldScalarizeInstruction(), and llvm::Value::users().

packScalarIntoVectorValue()

void InnerLoopVectorizer::packScalarIntoVectorValue	(	VPValue *	Def,
		const VPIteration &	Instance,
		VPTransformState &	State
	)

Construct the vector value of a scalarized value V one lane at a time.

Definition at line 2601 of file LoopVectorize.cpp.

References llvm::VPTransformState::Builder, Builder, llvm::IRBuilderBase::CreateInsertElement(), llvm::tgtok::Def, llvm::VPTransformState::get(), llvm::VPLane::getAsRuntimeExpr(), llvm::VPIteration::Lane, llvm::VPIteration::Part, llvm::VPTransformState::set(), and VF.

Referenced by llvm::VPReplicateRecipe::execute().

printDebugTracesAtEnd()

virtual void llvm::InnerLoopVectorizer::printDebugTracesAtEnd ( )

inlineprotectedvirtual

Reimplemented in llvm::EpilogueVectorizerEpilogueLoop, and llvm::EpilogueVectorizerMainLoop.

Definition at line 762 of file LoopVectorize.cpp.

Referenced by llvm::LoopVectorizationPlanner::executePlan().

printDebugTracesAtStart()

virtual void llvm::InnerLoopVectorizer::printDebugTracesAtStart ( )

inlineprotectedvirtual

Allow subclasses to override and print debug traces before/after vplan execution, when trace information is requested.

Reimplemented in llvm::EpilogueVectorizerEpilogueLoop, and llvm::EpilogueVectorizerMainLoop.

Definition at line 761 of file LoopVectorize.cpp.

Referenced by llvm::LoopVectorizationPlanner::executePlan().

recordVectorLoopValueForInductionCast()

void InnerLoopVectorizer::recordVectorLoopValueForInductionCast ( const InductionDescriptor &  ID, const Instruction *  EntryVal, Value *  VectorLoopValue, VPValue *  CastDef, VPTransformState &  State, unsigned  Part, unsigned  Lane = UINT_MAX  )

protected

If there is a cast involved in the induction variable ID, which should be ignored in the vectorized loop body, this function records the VectorLoopValue of the respective Phi also as the VectorLoopValue of the cast.

We had already proved that the casted Phi is equal to the uncasted Phi in the vectorized loop (under a runtime guard), and therefore there is no need to vectorize the cast - the same value can be used in the vector loop for both the Phi and the cast. If VectorLoopValue is a scalarized value, Lane is also specified, Otherwise, VectorLoopValue is a widened/vectorized value.

EntryVal is the value from the original loop that maps to the vector phi node and is used to distinguish what is the IV currently being processed - original one (if EntryVal is a phi corresponding to the original IV) or the "newly-created" one based on the proof mentioned above (see also buildScalarSteps() and createVectorIntOrFPInductionPHI()). In the latter case EntryVal is a TruncInst and we must not record anything for that IV, but it's error-prone to expect callers of this routine to care about that, hence this explicit parameter.

Definition at line 2326 of file LoopVectorize.cpp.

References assert(), and llvm::VPTransformState::set().

Referenced by buildScalarSteps().

reverseVector()

Value * InnerLoopVectorizer::reverseVector ( Value *  Vec )

protectedvirtual

Generate a shuffle sequence that will reverse the vector Vec.

Definition at line 2612 of file LoopVectorize.cpp.

References assert(), Builder, llvm::IRBuilderBase::CreateVectorReverse(), llvm::Value::getType(), and llvm::Type::isVectorTy().

Referenced by vectorizeInterleaveGroup(), and vectorizeMemoryInstruction().

scalarizeInstruction()

void InnerLoopVectorizer::scalarizeInstruction	(	Instruction *	Instr,
		VPValue *	Def,
		VPUser &	Operands,
		const VPIteration &	Instance,
		bool	IfPredicateInstr,
		VPTransformState &	State
	)

A helper function to scalarize a single Instruction in the innermost loop.

Generates a sequence of scalar instances for each lane between MinLane and MaxLane, times each part between MinPart and MaxPart, inclusive. Uses the VPValue operands from Operands instead of Instr's operands.

Definition at line 2980 of file LoopVectorize.cpp.

References AC, addNewMetadata(), assert(), llvm::VPTransformState::Builder, Builder, llvm::Instruction::clone(), llvm::LoopBase< BlockT, LoopT >::contains(), Cost, llvm::tgtok::Def, llvm::numbers::e, llvm::VPTransformState::get(), llvm::VPLane::getFirstLane(), llvm::IRBuilderBase::GetInsertBlock(), llvm::IRBuilderBase::GetInsertPoint(), llvm::Value::getName(), llvm::User::getNumOperands(), llvm::User::getOperand(), llvm::Value::getType(), llvm::IRBuilderBase::Insert(), llvm::Type::isAggregateType(), llvm::VPIteration::isFirstIteration(), llvm::LoopVectorizationCostModel::isUniformAfterVectorization(), llvm::Type::isVoidTy(), llvm::VPIteration::Lane, op, OrigLoop, PredicatedInstructions, llvm::AssumptionCache::registerAssumption(), llvm::VPTransformState::set(), setDebugLocFromInst(), llvm::IRBuilderBase::SetInsertPoint(), llvm::Value::setName(), llvm::User::setOperand(), and llvm::VPTransformState::VF.

Referenced by llvm::VPReplicateRecipe::execute().

setDebugLocFromInst()

void InnerLoopVectorizer::setDebugLocFromInst	(	IRBuilder<> &	B,
		const Value *	Ptr
	)

Set the debug location in the builder using the debug location in the instruction.

Definition at line 1047 of file LoopVectorize.cpp.

References assert(), B, llvm::DILocation::cloneByMultiplyingDuplicationFactor(), llvm::dbgs(), llvm::LinearPolySize< LeafTy >::getKnownMinValue(), llvm::LinearPolySize< LeafTy >::isScalable(), LLVM_DEBUG, UF, and VF.

Referenced by llvm::VPBlendRecipe::execute(), fixReduction(), scalarizeInstruction(), vectorizeInterleaveGroup(), vectorizeMemoryInstruction(), widenCallInstruction(), widenInstruction(), widenPHIInstruction(), and widenSelectInstruction().

shouldScalarizeInstruction()

bool InnerLoopVectorizer::shouldScalarizeInstruction ( Instruction *  I ) const

protected

Returns true if an instruction I should be scalarized instead of vectorized for the chosen vectorization factor.

Definition at line 2311 of file LoopVectorize.cpp.

References Cost, I, llvm::LoopVectorizationCostModel::isProfitableToScalarize(), llvm::LoopVectorizationCostModel::isScalarAfterVectorization(), and VF.

Referenced by needsScalarInduction().

sinkScalarOperands()

void InnerLoopVectorizer::sinkScalarOperands ( Instruction *  PredInst )

protected

Iteratively sink the scalarized operands of a predicated instruction into the block that was created for it.

Definition at line 4509 of file LoopVectorize.cpp.

References llvm::all_of(), BB, llvm::SmallVectorImpl< T >::clear(), llvm::SetVector< T, Vector, Set >::empty(), llvm::PHINode::getIncomingValueNumForOperand(), llvm::LoopInfoBase< BlockT, LoopT >::getLoopFor(), llvm::Instruction::getParent(), I, llvm::SetVector< T, Vector, Set >::insert(), LI, llvm::User::op_begin(), llvm::User::op_end(), and llvm::SetVector< T, Vector, Set >::pop_back_val().

truncateToMinimalBitwidths()

void InnerLoopVectorizer::truncateToMinimalBitwidths ( VPTransformState &  State )

protected

Shrinks vector element sizes to the smallest bitwidth they can be legally represented as.

Definition at line 3872 of file LoopVectorize.cpp.

References B, Cost, llvm::SmallPtrSetImpl< PtrType >::count(), llvm::tgtok::Def, llvm::Instruction::eraseFromParent(), llvm::IntegerType::get(), llvm::VPTransformState::get(), llvm::FixedVectorType::get(), llvm::Type::getContext(), llvm::LoopVectorizationCostModel::getMinimalBitwidths(), llvm::User::getOperand(), llvm::VPlan::getVPValue(), llvm::VPTransformState::hasAnyVectorValue(), I, llvm::ARM_PROC::IE, llvm::SmallPtrSetImpl< PtrType >::insert(), llvm_unreachable, llvm::VPTransformState::Plan, llvm::VPTransformState::reset(), SI, smallestIntegerVectorType(), llvm::Value::takeName(), UF, and llvm::Value::use_empty().

Referenced by fixVectorizedLoop().

vectorizeInterleaveGroup()

void InnerLoopVectorizer::vectorizeInterleaveGroup	(	const InterleaveGroup< Instruction > *	Group,
		ArrayRef< VPValue * >	VPDefs,
		VPTransformState &	State,
		VPValue *	Addr,
		ArrayRef< VPValue * >	StoredValues,
		VPValue *	BlockInMask = nullptr
	)

Try to vectorize interleaved access group Group with the base address given in Addr, optionally masking the vector operations if BlockInMask is non-null.

Use State to translate given VPValues to IR values in the vectorized loop.

Definition at line 2656 of file LoopVectorize.cpp.

References llvm::InterleaveGroup< InstTy >::addMetadata(), Addr, assert(), Builder, llvm::concatenateVectors(), Cost, llvm::IRBuilderBase::CreateAlignedLoad(), llvm::IRBuilderBase::CreateAlignedStore(), llvm::IRBuilderBase::CreateBinOp(), llvm::IRBuilderBase::CreateBitCast(), llvm::createBitMaskForGaps(), createBitOrPointerCast(), llvm::IRBuilderBase::CreateGEP(), llvm::createInterleaveMask(), llvm::IRBuilderBase::CreateMaskedLoad(), llvm::IRBuilderBase::CreateMaskedStore(), llvm::createReplicatedMask(), llvm::IRBuilderBase::CreateShuffleVector(), llvm::createStrideMask(), DL, gep, llvm::VPTransformState::get(), llvm::VectorType::get(), llvm::PoisonValue::get(), llvm::InterleaveGroup< InstTy >::getAlign(), llvm::Module::getDataLayout(), llvm::InterleaveGroup< InstTy >::getFactor(), llvm::InterleaveGroup< InstTy >::getIndex(), llvm::InterleaveGroup< InstTy >::getInsertPos(), llvm::IRBuilderBase::getInt32(), llvm::LinearPolySize< LeafTy >::getKnownMinValue(), llvm::InterleaveGroup< InstTy >::getMember(), getMemInstValueType(), llvm::Instruction::getModule(), llvm::Type::getPointerAddressSpace(), llvm::Type::getPointerTo(), llvm::Value::getType(), i, I, Index, llvm::InterleaveGroup< InstTy >::isReverse(), llvm::LinearPolySize< LeafTy >::isScalable(), llvm::LoopVectorizationCostModel::isScalarEpilogueAllowed(), llvm::InterleaveGroup< InstTy >::requiresScalarEpilogue(), reverseVector(), llvm::VPTransformState::set(), setDebugLocFromInst(), llvm::Value::stripPointerCasts(), UF, useMaskedInterleavedAccesses(), and VF.

Referenced by llvm::VPInterleaveRecipe::execute().

vectorizeMemoryInstruction()

void InnerLoopVectorizer::vectorizeMemoryInstruction	(	Instruction *	Instr,
		VPTransformState &	State,
		VPValue *	Def,
		VPValue *	Addr,
		VPValue *	StoredValue,
		VPValue *	BlockInMask
	)

Vectorize Load and Store instructions with the base address given in Addr, optionally masking the vector operations if BlockInMask is non-null.

Use State to translate given VPValues to IR values in the vectorized loop.

Definition at line 2838 of file LoopVectorize.cpp.

References addMetadata(), Addr, assert(), Builder, llvm::LoopVectorizationCostModel::CM_GatherScatter, llvm::LoopVectorizationCostModel::CM_Widen, llvm::LoopVectorizationCostModel::CM_Widen_Reverse, Cost, llvm::IRBuilderBase::CreateAlignedLoad(), llvm::IRBuilderBase::CreateAlignedStore(), llvm::IRBuilderBase::CreateBitCast(), llvm::IRBuilderBase::CreateGEP(), llvm::IRBuilderBase::CreateMaskedGather(), llvm::IRBuilderBase::CreateMaskedLoad(), llvm::IRBuilderBase::CreateMaskedScatter(), llvm::IRBuilderBase::CreateMaskedStore(), llvm::IRBuilderBase::CreateMul(), createStepForVF(), llvm::IRBuilderBase::CreateSub(), llvm::tgtok::Def, gep, llvm::VPTransformState::get(), llvm::VectorType::get(), llvm::PoisonValue::get(), llvm::IRBuilderBase::getInt32(), llvm::IRBuilderBase::getInt32Ty(), llvm::getLoadStoreAlignment(), getMemInstValueType(), llvm::getRuntimeVF(), llvm::LoopVectorizationCostModel::getWideningDecision(), LI, reverseVector(), llvm::VPTransformState::set(), setDebugLocFromInst(), llvm::GetElementPtrInst::setIsInBounds(), SI, UF, and VF.

Referenced by llvm::VPWidenMemoryInstructionRecipe::execute().

widenCallInstruction()

void InnerLoopVectorizer::widenCallInstruction	(	CallInst &	I,
		VPValue *	Def,
		VPUser &	ArgOperands,
		VPTransformState &	State
	)

Widen a single call instruction within the innermost loop.

Definition at line 4969 of file LoopVectorize.cpp.

References addMetadata(), Arg, llvm::AMDGPU::HSAMD::Kernel::Key::Args, assert(), Builder, llvm::Instruction::copyFastMathFlags(), Cost, llvm::IRBuilderBase::CreateCall(), llvm::tgtok::Def, llvm::enumerate(), llvm::VFShape::get(), llvm::VPTransformState::get(), llvm::VectorType::get(), llvm::Intrinsic::getDeclaration(), llvm::LinearPolySize< LeafTy >::getKnownMinValue(), llvm::LoopVectorizationCostModel::getVectorCallCost(), llvm::LoopVectorizationCostModel::getVectorIntrinsicCost(), llvm::getVectorIntrinsicIDForCall(), llvm::VFDatabase::getVectorizedFunction(), llvm::hasVectorInstrinsicScalarOpd(), I, llvm::InstructionCost::isValid(), llvm::ElementCount::isVector(), M, llvm::VPUser::operands(), llvm::VPTransformState::set(), setDebugLocFromInst(), TLI, llvm::ToVectorTy(), UF, and VF.

Referenced by llvm::VPWidenCallRecipe::execute().

widenGEP()

void InnerLoopVectorizer::widenGEP	(	GetElementPtrInst *	GEP,
		VPValue *	VPDef,
		VPUser &	Indices,
		unsigned	UF,
		ElementCount	VF,
		bool	IsPtrLoopInvariant,
		SmallBitVector &	IsIndexLoopInvariant,
		VPTransformState &	State
	)

Vectorize a single GetElementPtrInst based on information gathered and decisions taken during planning.

Definition at line 4588 of file LoopVectorize.cpp.

References addMetadata(), llvm::SmallBitVector::all(), assert(), Builder, llvm::IRBuilderBase::CreateGEP(), llvm::IRBuilderBase::CreateInBoundsGEP(), llvm::IRBuilderBase::CreateVectorSplat(), E, GEP, llvm::VPTransformState::get(), I, llvm::IRBuilderBase::Insert(), llvm::ElementCount::isScalar(), llvm::ElementCount::isVector(), Operands, llvm::VPTransformState::set(), UF, and VF.

Referenced by llvm::VPWidenGEPRecipe::execute().

widenInstruction()

void InnerLoopVectorizer::widenInstruction	(	Instruction &	I,
		VPValue *	Def,
		VPUser &	Operands,
		VPTransformState &	State
	)

Widen a single instruction within the innermost loop.

Vectorize casts.

Definition at line 4861 of file LoopVectorize.cpp.

References llvm::MCID::Add, addMetadata(), B, Builder, llvm::MCID::Call, llvm::IRBuilderBase::CreateCast(), llvm::IRBuilderBase::CreateFCmp(), llvm::IRBuilderBase::CreateICmp(), llvm::IRBuilderBase::CreateNAryOp(), llvm::dbgs(), llvm::tgtok::Def, llvm::VPTransformState::get(), llvm::VectorType::get(), llvm::User::getOperand(), I, llvm::ElementCount::isScalar(), LLVM_DEBUG, llvm_unreachable, llvm::User::operands(), llvm::MCID::Select, llvm::VPTransformState::set(), setDebugLocFromInst(), llvm::IRBuilderBase::setFastMathFlags(), UF, and VF.

Referenced by llvm::VPWidenRecipe::execute().

widenIntOrFpInduction()

void InnerLoopVectorizer::widenIntOrFpInduction	(	PHINode *	IV,
		Value *	Start,
		TruncInst *	Trunc,
		VPValue *	Def,
		VPValue *	CastDef,
		VPTransformState &	State
	)

Widen an integer or floating-point induction variable IV.

If Trunc is provided, the integer induction variable will first be truncated to the corresponding type.

Definition at line 2354 of file LoopVectorize.cpp.

Referenced by llvm::VPWidenIntOrFpInductionRecipe::execute().

widenPHIInstruction()

void InnerLoopVectorizer::widenPHIInstruction	(	Instruction *	PN,
		RecurrenceDescriptor *	RdxDesc,
		VPWidenPHIRecipe *	PhiR,
		VPTransformState &	State
	)

Vectorize a single PHINode in a block.

This method handles the induction variable canonicalization. It supports both VF = 1 for unrolled loops and arbitrary length vectors.

Definition at line 4659 of file LoopVectorize.cpp.

References llvm::PHINode::addIncoming(), assert(), Builder, Cost, llvm::MapVector< KeyT, ValueT, MapType, VectorType >::count(), llvm::GetElementPtrInst::Create(), llvm::PHINode::Create(), llvm::IRBuilderBase::CreateAdd(), llvm::IRBuilderBase::CreateGEP(), llvm::IRBuilderBase::CreateInsertElement(), llvm::IRBuilderBase::CreateMul(), llvm::IRBuilderBase::CreatePHI(), llvm::IRBuilderBase::CreateSExtOrTrunc(), llvm::IRBuilderBase::CreateStepVector(), llvm::IRBuilderBase::CreateVectorSplat(), DL, emitTransformedIndex(), EnableVPlanNativePath, GEP, llvm::ConstantInt::get(), llvm::VectorType::get(), llvm::Module::getDataLayout(), llvm::RecurrenceDescriptor::getFastMathFlags(), llvm::BasicBlock::getFirstInsertionPt(), llvm::LinearPolySize< LeafTy >::getFixedValue(), llvm::LoopBase< BlockT, LoopT >::getHeader(), llvm::LoopVectorizationLegality::getInductionVars(), llvm::IRBuilderBase::getInt32(), llvm::InductionDescriptor::getKind(), llvm::VPValue::getLiveInIRValue(), llvm::LoopInfoBase< BlockT, LoopT >::getLoopFor(), llvm::LoopBase< BlockT, LoopT >::getLoopLatch(), llvm::BasicBlock::getModule(), llvm::User::getNumOperands(), llvm::Instruction::getParent(), llvm::Type::getPointerElementType(), llvm::RecurrenceDescriptor::getRecurrenceIdentity(), llvm::RecurrenceDescriptor::getRecurrenceKind(), llvm::getRuntimeVF(), llvm::Type::getScalarType(), llvm::PredicatedScalarEvolution::getSE(), llvm::ConstantVector::getSplat(), llvm::InductionDescriptor::getStartValue(), llvm::VPWidenPHIRecipe::getStartValue(), llvm::InductionDescriptor::getStep(), llvm::BasicBlock::getTerminator(), llvm::SCEV::getType(), llvm::Value::getType(), llvm::InductionDescriptor::IK_FpInduction, llvm::InductionDescriptor::IK_IntInduction, llvm::InductionDescriptor::IK_NoInduction, llvm::InductionDescriptor::IK_PtrInduction, Induction, llvm::LoopVectorizationLegality::isFirstOrderRecurrence(), llvm::LoopVectorizationCostModel::isInLoopReduction(), llvm::RecurrenceDescriptor::isMinMaxRecurrenceKind(), llvm::LoopVectorizationLegality::isReductionVariable(), llvm::LinearPolySize< LeafTy >::isScalable(), llvm::ElementCount::isScalar(), llvm::LoopVectorizationCostModel::isScalarAfterVectorization(), llvm::LoopVectorizationCostModel::isUniformAfterVectorization(), Legal, LI, llvm_unreachable, llvm::MapVector< KeyT, ValueT, MapType, VectorType >::lookup(), LoopVectorBody, LoopVectorPreHeader, OrigLoop, OrigPHIsToFix, P, PSE, llvm::VPTransformState::set(), setDebugLocFromInst(), llvm::IRBuilderBase::SetInsertPoint(), llvm::Value::setName(), llvm::VPTransformState::UF, UF, llvm::VPTransformState::VF, and VF.

Referenced by llvm::VPWidenPHIRecipe::execute().

widenSelectInstruction()

void InnerLoopVectorizer::widenSelectInstruction	(	SelectInst &	I,
		VPValue *	VPDef,
		VPUser &	Operands,
		bool	InvariantCond,
		VPTransformState &	State
	)

Widen a single select instruction within the innermost loop.

Definition at line 5039 of file LoopVectorize.cpp.

References addMetadata(), Builder, Cond, llvm::IRBuilderBase::CreateSelect(), llvm::VPTransformState::get(), I, Operands, llvm::VPTransformState::set(), setDebugLocFromInst(), and UF.

Referenced by llvm::VPWidenSelectRecipe::execute().

Friends And Related Function Documentation

LoopVectorizationPlanner

friend class LoopVectorizationPlanner

friend

Definition at line 573 of file LoopVectorize.cpp.

Member Data Documentation

AA

AAResults* llvm::InnerLoopVectorizer::AA

protected

Alias Analysis.

Definition at line 779 of file LoopVectorize.cpp.

AC

AssumptionCache* llvm::InnerLoopVectorizer::AC

protected

Assumption Cache.

Definition at line 788 of file LoopVectorize.cpp.

Referenced by llvm::LoopVectorizationCostModel::collectValuesToIgnore(), getScalarEpilogueLowering(), processLoopInVPlanNativePath(), and scalarizeInstruction().

AddedSafetyChecks

bool llvm::InnerLoopVectorizer::AddedSafetyChecks = false

protected

Definition at line 857 of file LoopVectorize.cpp.

Referenced by areSafetyChecksAdded(), emitMemRuntimeChecks(), and emitSCEVChecks().

BFI

BlockFrequencyInfo* llvm::InnerLoopVectorizer::BFI

protected

BFI and PSI are used to check for profile guided size optimizations.

Definition at line 868 of file LoopVectorize.cpp.

Referenced by getScalarEpilogueLowering(), InnerLoopVectorizer(), and processLoopInVPlanNativePath().

Builder

IRBuilder llvm::InnerLoopVectorizer::Builder

protected

The builder that we use.

Definition at line 809 of file LoopVectorize.cpp.

Referenced by buildScalarSteps(), completeLoopSkeleton(), createBitOrPointerCast(), llvm::VPRecipeBuilder::createBlockInMask(), llvm::VPRecipeBuilder::createEdgeMask(), createVectorizedLoopSkeleton(), createVectorLoopSkeleton(), emitMinimumIterationCountCheck(), llvm::EpilogueVectorizerMainLoop::emitMinimumIterationCountCheck(), llvm::EpilogueVectorizerEpilogueLoop::emitMinimumVectorEpilogueIterCountCheck(), llvm::LoopVectorizationPlanner::executePlan(), fixFirstOrderRecurrence(), fixLCSSAPHIs(), fixNonInductionPHIs(), fixReduction(), llvm::VPTransformState::get(), getBroadcastInstrs(), getOrCreateTripCount(), getOrCreateVectorTripCount(), getStepVector(), packScalarIntoVectorValue(), reverseVector(), scalarizeInstruction(), vectorizeInterleaveGroup(), vectorizeMemoryInstruction(), widenCallInstruction(), widenGEP(), widenInstruction(), widenPHIInstruction(), and widenSelectInstruction().

Cost

LoopVectorizationCostModel* llvm::InnerLoopVectorizer::Cost

protected

The profitablity analysis.

Definition at line 854 of file LoopVectorize.cpp.

Referenced by buildScalarSteps(), completeLoopSkeleton(), emitMemRuntimeChecks(), emitMinimumIterationCountCheck(), llvm::EpilogueVectorizerMainLoop::emitMinimumIterationCountCheck(), llvm::EpilogueVectorizerEpilogueLoop::emitMinimumVectorEpilogueIterCountCheck(), emitSCEVChecks(), fixLCSSAPHIs(), fixReduction(), getOrCreateVectorTripCount(), llvm::LoopVectorizationCostModel::getVectorCallCost(), scalarizeInstruction(), llvm::LoopVectorizationCostModel::setCostBasedWideningDecision(), llvm::LoopVectorizationCostModel::setWideningDecision(), shouldScalarizeInstruction(), truncateToMinimalBitwidths(), vectorizeInterleaveGroup(), vectorizeMemoryInstruction(), widenCallInstruction(), and widenPHIInstruction().

DT

DominatorTree* llvm::InnerLoopVectorizer::DT

protected

Dominator Tree.

Definition at line 776 of file LoopVectorize.cpp.

Referenced by completeLoopSkeleton(), GeneratedRTChecks::Create(), llvm::EpilogueVectorizerEpilogueLoop::createEpilogueVectorizedLoopSkeleton(), createVectorLoopSkeleton(), emitMemRuntimeChecks(), GeneratedRTChecks::emitMemRuntimeChecks(), emitMinimumIterationCountCheck(), llvm::EpilogueVectorizerMainLoop::emitMinimumIterationCountCheck(), llvm::EpilogueVectorizerEpilogueLoop::emitMinimumVectorEpilogueIterCountCheck(), emitSCEVChecks(), GeneratedRTChecks::emitSCEVChecks(), llvm::LoopVectorizationPlanner::executePlan(), getBroadcastInstrs(), getScalarEpilogueLowering(), processLoopInVPlanNativePath(), and GeneratedRTChecks::~GeneratedRTChecks().

Induction

PHINode* llvm::InnerLoopVectorizer::Induction = nullptr

protected

The new Induction variable which was added to the new block.

Definition at line 836 of file LoopVectorize.cpp.

Referenced by llvm::LoopVectorizationPlanner::collectTriviallyDeadInstructions(), llvm::LoopVectorizationCostModel::collectValuesToIgnore(), llvm::EpilogueVectorizerMainLoop::createEpilogueVectorizedLoopSkeleton(), llvm::EpilogueVectorizerEpilogueLoop::createEpilogueVectorizedLoopSkeleton(), createVectorizedLoopSkeleton(), llvm::LoopVectorizationPlanner::executePlan(), llvm::EpilogueVectorizerMainLoop::printDebugTracesAtEnd(), llvm::EpilogueVectorizerEpilogueLoop::printDebugTracesAtEnd(), and widenPHIInstruction().

IVEndValues

DenseMap<PHINode *, Value *> llvm::InnerLoopVectorizer::IVEndValues

protected

Definition at line 861 of file LoopVectorize.cpp.

Referenced by createInductionResumeValues().

Legal

LoopVectorizationLegality* llvm::InnerLoopVectorizer::Legal

protected

The legality analysis.

Definition at line 851 of file LoopVectorize.cpp.

Referenced by llvm::LoopVectorizationCostModel::blockNeedsPredication(), llvm::LoopVectorizationCostModel::canVectorizeReductions(), llvm::LoopVectorizationCostModel::collectInLoopReductions(), llvm::LoopVectorizationPlanner::collectTriviallyDeadInstructions(), llvm::LoopVectorizationCostModel::collectValuesToIgnore(), llvm::LoopVectorizationCostModel::computeMaxVF(), llvm::VPRecipeBuilder::createBlockInMask(), llvm::EpilogueVectorizerMainLoop::createEpilogueVectorizedLoopSkeleton(), llvm::EpilogueVectorizerEpilogueLoop::createEpilogueVectorizedLoopSkeleton(), createInductionResumeValues(), createVectorizedLoopSkeleton(), emitMemRuntimeChecks(), fixCrossIterationPHIs(), fixReduction(), getAddressAccessSCEV(), getOrCreateTripCount(), llvm::LoopVectorizationCostModel::getSmallestAndWidestTypes(), llvm::LoopVectorizationCostModel::interleavedAccessCanBeWidened(), llvm::LoopVectorizationCostModel::isLegalMaskedLoad(), llvm::LoopVectorizationCostModel::isLegalMaskedStore(), llvm::LoopVectorizationCostModel::isOptimizableIVTruncate(), llvm::LoopVectorizationCostModel::isPredicatedInst(), llvm::LoopVectorizationCostModel::isScalarWithPredication(), isStrideMul(), llvm::LoopVectorizationCostModel::memoryInstructionCanBeWidened(), llvm::LoopVectorizationCostModel::runtimeChecksRequired(), llvm::LoopVectorizationCostModel::selectInterleaveCount(), llvm::LoopVectorizationCostModel::setCostBasedWideningDecision(), llvm::VPRecipeBuilder::tryToCreateWidenRecipe(), and widenPHIInstruction().

LI

LoopInfo* llvm::InnerLoopVectorizer::LI

protected

Loop Info.

Definition at line 773 of file LoopVectorize.cpp.

Referenced by llvm::LoopVectorizationCostModel::calculateRegisterUsage(), collectSupportedLoops(), completeLoopSkeleton(), GeneratedRTChecks::Create(), llvm::EpilogueVectorizerEpilogueLoop::createEpilogueVectorizedLoopSkeleton(), createVectorLoopSkeleton(), emitMemRuntimeChecks(), GeneratedRTChecks::emitMemRuntimeChecks(), emitMinimumIterationCountCheck(), llvm::EpilogueVectorizerMainLoop::emitMinimumIterationCountCheck(), GeneratedRTChecks::emitSCEVChecks(), emitTransformedIndex(), llvm::LoopVectorizationPlanner::executePlan(), fixFirstOrderRecurrence(), fixReduction(), getScalarEpilogueLowering(), llvm::LoopVectorizationCostModel::isLegalGatherOrScatter(), llvm::LoopVectorizationCostModel::memoryInstructionCanBeWidened(), processLoopInVPlanNativePath(), sinkScalarOperands(), vectorizeMemoryInstruction(), and widenPHIInstruction().

LoopBypassBlocks

SmallVector<BasicBlock *, 4> llvm::InnerLoopVectorizer::LoopBypassBlocks

protected

A list of all bypass blocks. The first block is the entry of the loop.

Definition at line 833 of file LoopVectorize.cpp.

Referenced by llvm::EpilogueVectorizerEpilogueLoop::createEpilogueVectorizedLoopSkeleton(), createInductionResumeValues(), emitMemRuntimeChecks(), emitMinimumIterationCountCheck(), llvm::EpilogueVectorizerMainLoop::emitMinimumIterationCountCheck(), llvm::EpilogueVectorizerEpilogueLoop::emitMinimumVectorEpilogueIterCountCheck(), emitSCEVChecks(), and fixReduction().

LoopExitBlock

BasicBlock* llvm::InnerLoopVectorizer::LoopExitBlock

protected

The (unique) ExitBlock of the scalar loop.

Note that there can be multiple exiting edges reaching this block.

Definition at line 824 of file LoopVectorize.cpp.

Referenced by llvm::EpilogueVectorizerEpilogueLoop::createEpilogueVectorizedLoopSkeleton(), createVectorLoopSkeleton(), emitMinimumIterationCountCheck(), llvm::EpilogueVectorizerMainLoop::emitMinimumIterationCountCheck(), emitSCEVChecks(), fixLCSSAPHIs(), and fixReduction().

LoopMiddleBlock

BasicBlock* llvm::InnerLoopVectorizer::LoopMiddleBlock

protected

Middle Block between the vector and the scalar.

Definition at line 820 of file LoopVectorize.cpp.

Referenced by completeLoopSkeleton(), createInductionResumeValues(), createVectorLoopSkeleton(), fixFirstOrderRecurrence(), fixLCSSAPHIs(), and fixReduction().

LoopScalarBody

BasicBlock* llvm::InnerLoopVectorizer::LoopScalarBody

protected

The scalar loop body.

Definition at line 830 of file LoopVectorize.cpp.

Referenced by createInductionResumeValues(), and createVectorLoopSkeleton().

LoopScalarPreHeader

BasicBlock* llvm::InnerLoopVectorizer::LoopScalarPreHeader

protected

The scalar-loop preheader.

Definition at line 817 of file LoopVectorize.cpp.

Referenced by llvm::EpilogueVectorizerMainLoop::createEpilogueVectorizedLoopSkeleton(), llvm::EpilogueVectorizerEpilogueLoop::createEpilogueVectorizedLoopSkeleton(), createInductionResumeValues(), createVectorizedLoopSkeleton(), createVectorLoopSkeleton(), fixFirstOrderRecurrence(), and fixReduction().

LoopVectorBody

BasicBlock* llvm::InnerLoopVectorizer::LoopVectorBody

protected

The vector loop body.

Definition at line 827 of file LoopVectorize.cpp.

Referenced by completeLoopSkeleton(), createVectorLoopSkeleton(), emitTransformedIndex(), fixFirstOrderRecurrence(), fixReduction(), and widenPHIInstruction().

LoopVectorPreHeader

BasicBlock* llvm::InnerLoopVectorizer::LoopVectorPreHeader

protected

The vector-loop preheader.

Definition at line 814 of file LoopVectorize.cpp.

Referenced by completeLoopSkeleton(), llvm::EpilogueVectorizerEpilogueLoop::createEpilogueVectorizedLoopSkeleton(), createVectorLoopSkeleton(), emitMemRuntimeChecks(), GeneratedRTChecks::emitMemRuntimeChecks(), emitMinimumIterationCountCheck(), llvm::EpilogueVectorizerMainLoop::emitMinimumIterationCountCheck(), llvm::EpilogueVectorizerEpilogueLoop::emitMinimumVectorEpilogueIterCountCheck(), emitSCEVChecks(), GeneratedRTChecks::emitSCEVChecks(), fixFirstOrderRecurrence(), getBroadcastInstrs(), and widenPHIInstruction().

LVer

std::unique_ptr<LoopVersioning> llvm::InnerLoopVectorizer::LVer

protected

LoopVersioning.

It's only set up (non-null) if memchecks were used.

This is currently only used to add no-alias metadata based on the memchecks. The actually versioning is performed manually.

Definition at line 798 of file LoopVectorize.cpp.

Referenced by addNewMetadata(), and emitMemRuntimeChecks().

OldInduction

PHINode* llvm::InnerLoopVectorizer::OldInduction = nullptr

protected

The induction variable of the old basic block.

Definition at line 839 of file LoopVectorize.cpp.

Referenced by llvm::EpilogueVectorizerMainLoop::createEpilogueVectorizedLoopSkeleton(), llvm::EpilogueVectorizerEpilogueLoop::createEpilogueVectorizedLoopSkeleton(), createInductionResumeValues(), and createVectorizedLoopSkeleton().

OptForSizeBasedOnProfile

bool llvm::InnerLoopVectorizer::OptForSizeBasedOnProfile

protected

Definition at line 873 of file LoopVectorize.cpp.

Referenced by emitMemRuntimeChecks(), emitSCEVChecks(), and InnerLoopVectorizer().

ORE

OptimizationRemarkEmitter* llvm::InnerLoopVectorizer::ORE

protected

Interface to emit optimization remarks.

Definition at line 791 of file LoopVectorize.cpp.

Referenced by checkMixedPrecision(), collectSupportedLoops(), completeLoopSkeleton(), llvm::LoopVectorizationCostModel::computeMaxVF(), emitMemRuntimeChecks(), isExplicitVecOuterLoop(), llvm::LoopVectorizationPlanner::plan(), processLoopInVPlanNativePath(), llvm::reportVectorizationFailure(), llvm::LoopVectorizationCostModel::runtimeChecksRequired(), and llvm::LoopVectorizationCostModel::selectVectorizationFactor().

OrigLoop

Loop* llvm::InnerLoopVectorizer::OrigLoop

protected

The original loop.

Definition at line 762 of file LoopVectorize.cpp.

Referenced by clearReductionWrapFlags(), llvm::LoopVectorizationPlanner::collectTriviallyDeadInstructions(), completeLoopSkeleton(), llvm::VPRecipeBuilder::createBlockInMask(), llvm::VPRecipeBuilder::createEdgeMask(), llvm::EpilogueVectorizerMainLoop::createEpilogueVectorizedLoopSkeleton(), llvm::EpilogueVectorizerEpilogueLoop::createEpilogueVectorizedLoopSkeleton(), createVectorizedLoopSkeleton(), createVectorLoopSkeleton(), emitMemRuntimeChecks(), fixCrossIterationPHIs(), fixFirstOrderRecurrence(), fixLCSSAPHIs(), fixReduction(), fixupIVUsers(), fixVectorizedLoop(), getBroadcastInstrs(), InnerLoopVectorizer(), needsScalarInduction(), llvm::LoopVectorizationPlanner::plan(), llvm::LoopVectorizationPlanner::planInVPlanNativePath(), scalarizeInstruction(), llvm::VPRecipeBuilder::tryToCreateWidenRecipe(), and widenPHIInstruction().

OrigPHIsToFix

SmallVector<PHINode *, 8> llvm::InnerLoopVectorizer::OrigPHIsToFix

protected

Definition at line 865 of file LoopVectorize.cpp.

Referenced by fixNonInductionPHIs(), fixVectorizedLoop(), and widenPHIInstruction().

PredicatedInstructions

SmallVector<Instruction *, 4> llvm::InnerLoopVectorizer::PredicatedInstructions

protected

Store instructions that were predicated.

Definition at line 842 of file LoopVectorize.cpp.

Referenced by scalarizeInstruction().

PSE

PredicatedScalarEvolution& llvm::InnerLoopVectorizer::PSE

protected

A wrapper around ScalarEvolution used to add runtime SCEV checks.

Applies dynamic knowledge to simplify SCEV expressions and converts them to a more usable form.

Definition at line 770 of file LoopVectorize.cpp.

Referenced by llvm::LoopVectorizationCostModel::computeMaxVF(), createInductionResumeValues(), emitMemRuntimeChecks(), fixupIVUsers(), fixVectorizedLoop(), getAddressAccessSCEV(), getOrCreateTripCount(), processLoopInVPlanNativePath(), llvm::LoopVectorizationCostModel::runtimeChecksRequired(), llvm::LoopVectorizationCostModel::selectInterleaveCount(), llvm::VPRecipeBuilder::tryToCreateWidenRecipe(), and widenPHIInstruction().

PSI

ProfileSummaryInfo* llvm::InnerLoopVectorizer::PSI

protected

Definition at line 869 of file LoopVectorize.cpp.

Referenced by getScalarEpilogueLowering(), InnerLoopVectorizer(), and processLoopInVPlanNativePath().

RTChecks

GeneratedRTChecks& llvm::InnerLoopVectorizer::RTChecks

protected

Structure to hold information about generated runtime checks, responsible for cleaning the checks, if vectorization turns out unprofitable.

Definition at line 877 of file LoopVectorize.cpp.

Referenced by emitMemRuntimeChecks(), and emitSCEVChecks().

TLI

const TargetLibraryInfo* llvm::InnerLoopVectorizer::TLI

protected

Target Library Info.

Definition at line 782 of file LoopVectorize.cpp.

Referenced by getScalarEpilogueLowering(), llvm::LoopVectorizationCostModel::getVectorCallCost(), llvm::LoopVectorizationCostModel::getVectorIntrinsicCost(), processLoopInVPlanNativePath(), and widenCallInstruction().

TripCount

Value* llvm::InnerLoopVectorizer::TripCount = nullptr

protected

Trip count of the original loop.

Definition at line 845 of file LoopVectorize.cpp.

Referenced by getOrCreateTripCount().

TTI

const TargetTransformInfo* llvm::InnerLoopVectorizer::TTI

protected

Target Transform Info.

Definition at line 785 of file LoopVectorize.cpp.

Referenced by llvm::LoopVectorizationCostModel::calculateRegisterUsage().

UF

unsigned llvm::InnerLoopVectorizer::UF

protected

The vectorization unroll factor to use.

Each scalar is vectorized to this many different vector instructions.

Definition at line 806 of file LoopVectorize.cpp.

Referenced by buildScalarSteps(), clearReductionWrapFlags(), llvm::EpilogueVectorizerMainLoop::createEpilogueVectorizedLoopSkeleton(), llvm::EpilogueVectorizerEpilogueLoop::createEpilogueVectorizedLoopSkeleton(), createVectorizedLoopSkeleton(), emitMinimumIterationCountCheck(), llvm::EpilogueVectorizerMainLoop::emitMinimumIterationCountCheck(), fixFirstOrderRecurrence(), fixLCSSAPHIs(), fixReduction(), getOrCreateVectorTripCount(), llvm::LoopVectorizationPlanner::setBestPlan(), setDebugLocFromInst(), truncateToMinimalBitwidths(), vectorizeInterleaveGroup(), vectorizeMemoryInstruction(), widenCallInstruction(), widenGEP(), widenInstruction(), widenPHIInstruction(), and widenSelectInstruction().

VectorTripCount

Value* llvm::InnerLoopVectorizer::VectorTripCount = nullptr

protected

Trip count of the widened loop (TripCount - TripCount % (VF*UF))

Definition at line 848 of file LoopVectorize.cpp.

Referenced by completeLoopSkeleton(), createInductionResumeValues(), and getOrCreateVectorTripCount().

VF

ElementCount llvm::InnerLoopVectorizer::VF

protected

The vectorization SIMD factor to use.

Each vector will have this many vector elements.

Definition at line 802 of file LoopVectorize.cpp.

Referenced by buildScalarSteps(), llvm::LoopVectorizationPlanner::buildVPlans(), llvm::LoopVectorizationCostModel::calculateRegisterUsage(), llvm::LoopVectorizationCostModel::canTruncateToMinimalBitwidth(), llvm::LoopVectorizationCostModel::collectInstsToScalarize(), llvm::LoopVectorizationCostModel::collectUniformsAndScalars(), createBitOrPointerCast(), llvm::EpilogueVectorizerMainLoop::createEpilogueVectorizedLoopSkeleton(), llvm::EpilogueVectorizerEpilogueLoop::createEpilogueVectorizedLoopSkeleton(), createStepForVF(), createVectorizedLoopSkeleton(), emitMinimumIterationCountCheck(), llvm::EpilogueVectorizerMainLoop::emitMinimumIterationCountCheck(), fixFirstOrderRecurrence(), fixLCSSAPHIs(), fixReduction(), fixVectorizedLoop(), llvm::VPTransformState::get(), getBroadcastInstrs(), getOrCreateVectorTripCount(), llvm::getRuntimeVF(), llvm::LoopVectorizationCostModel::getVectorCallCost(), llvm::LoopVectorizationCostModel::getVectorIntrinsicCost(), llvm::LoopVectorizationCostModel::getWideningCost(), llvm::LoopVectorizationCostModel::getWideningDecision(), llvm::VPRecipeBuilder::handleReplication(), llvm::LoopVectorizationCostModel::interleavedAccessCanBeWidened(), llvm::LoopVectorizationCostModel::isOptimizableIVTruncate(), llvm::LoopVectorizationCostModel::isProfitableToScalarize(), llvm::LoopVectorizationCostModel::isScalarAfterVectorization(), llvm::LoopVectorizationCostModel::isScalarWithPredication(), llvm::LoopVectorizationCostModel::isUniformAfterVectorization(), MaybeVectorizeType(), packScalarIntoVectorValue(), llvm::LoopVectorizationPlanner::plan(), llvm::LoopVectorizationPlanner::planInVPlanNativePath(), processLoopInVPlanNativePath(), llvm::LoopVectorizationCostModel::selectInterleaveCount(), llvm::LoopVectorizationPlanner::setBestPlan(), llvm::LoopVectorizationCostModel::setCostBasedWideningDecision(), setDebugLocFromInst(), llvm::LoopVectorizationCostModel::setWideningDecision(), shouldScalarizeInstruction(), vectorizeInterleaveGroup(), vectorizeMemoryInstruction(), widenCallInstruction(), widenGEP(), widenInstruction(), and widenPHIInstruction().

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The documentation for this class was generated from the following file:

• lib/Transforms/Vectorize/LoopVectorize.cpp