LLVM: llvm::InnerLoopVectorizer Class Reference (original) (raw)

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

Public Member Functions
	InnerLoopVectorizer (Loop OrigLoop, PredicatedScalarEvolution &PSE, LoopInfo LI, DominatorTree DT, const TargetTransformInfo TTI, AssumptionCache AC, ElementCount VecWidth, unsigned UnrollFactor, LoopVectorizationCostModel CM, GeneratedRTChecks &RTChecks, VPlan &Plan)
virtual	~InnerLoopVectorizer ()=default
virtual BasicBlock *	createVectorizedLoopSkeleton ()
	Creates a basic block for the scalar preheader.
void	fixVectorizedLoop (VPTransformState &State)
	Fix the vectorized code, taking care of header phi's, and more.
void	fixNonInductionPHIs (VPTransformState &State)
	Fix the non-induction PHIs in Plan.
Value *	getTripCount () const
	Returns the original loop trip count.
void	setTripCount (Value *TC)
	Used to set the trip count after ILV's construction and after the preheader block has been executed.

Protected Member Functions
BasicBlock *	createScalarPreheader (StringRef Prefix)
	Create and return a new IR basic block for the scalar preheader whose name is prefixed with Prefix.
virtual void	printDebugTracesAtStart ()
	Allow subclasses to override and print debug traces before/after vplan execution, when trace information is requested.
virtual void	printDebugTracesAtEnd ()

Protected Attributes
Loop *	OrigLoop
	The original loop.
PredicatedScalarEvolution &	PSE
	A wrapper around ScalarEvolution used to add runtime SCEV checks.
LoopInfo *	LI
	Loop Info.
DominatorTree *	DT
	Dominator Tree.
const TargetTransformInfo *	TTI
	Target Transform Info.
AssumptionCache *	AC
	Assumption Cache.
ElementCount	VF
	The vectorization SIMD factor to use.
unsigned	UF
	The vectorization unroll factor to use.
IRBuilder	Builder
	The builder that we use.
Value *	TripCount = nullptr
	Trip count of the original loop.
LoopVectorizationCostModel *	Cost
	The profitablity analysis.
GeneratedRTChecks &	RTChecks
	Structure to hold information about generated runtime checks, responsible for cleaning the checks, if vectorization turns out unprofitable.
VPlan &	Plan
VPBasicBlock *	VectorPHVPBB
	The vector preheader block of Plan, used as target for check blocks introduced during skeleton creation.

Friends
class	LoopVectorizationPlanner

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 499 of file LoopVectorize.cpp.

llvm::InnerLoopVectorizer::InnerLoopVectorizer ( Loop * OrigLoop, PredicatedScalarEvolution & PSE, LoopInfo * LI, DominatorTree * DT, const TargetTransformInfo * TTI, AssumptionCache * AC, ElementCount VecWidth, unsigned UnrollFactor, LoopVectorizationCostModel * CM, GeneratedRTChecks & RTChecks, VPlan & Plan )	inline

Definition at line 501 of file LoopVectorize.cpp.

References AC, Builder, llvm::cast(), Cost, DT, LI, OrigLoop, Plan, PSE, RTChecks, TTI, UF, VectorPHVPBB, and VF.

Referenced by llvm::InnerLoopAndEpilogueVectorizer::InnerLoopAndEpilogueVectorizer().

◆ ~InnerLoopVectorizer()

virtual llvm::InnerLoopVectorizer::~InnerLoopVectorizer ( )	virtualdefault

◆ createScalarPreheader()

◆ createVectorizedLoopSkeleton()

BasicBlock * InnerLoopVectorizer::createVectorizedLoopSkeleton ( )	virtual

◆ fixNonInductionPHIs()

◆ fixVectorizedLoop()

◆ getTripCount()

Value * llvm::InnerLoopVectorizer::getTripCount ( ) const	inline

◆ printDebugTracesAtEnd()

virtual void llvm::InnerLoopVectorizer::printDebugTracesAtEnd ( )	inlineprotectedvirtual

◆ printDebugTracesAtStart()

virtual void llvm::InnerLoopVectorizer::printDebugTracesAtStart ( )	inlineprotectedvirtual

◆ setTripCount()

void llvm::InnerLoopVectorizer::setTripCount ( Value * TC)	inline

◆ LoopVectorizationPlanner

◆ AC

◆ Builder

◆ Cost

◆ DT

◆ LI

◆ OrigLoop

Loop* llvm::InnerLoopVectorizer::OrigLoop	protected

◆ Plan

VPlan& llvm::InnerLoopVectorizer::Plan	protected

◆ PSE

◆ RTChecks

GeneratedRTChecks& llvm::InnerLoopVectorizer::RTChecks	protected

◆ TripCount

Value* llvm::InnerLoopVectorizer::TripCount = nullptr	protected