#include "llvm/Transforms/Vectorize/SLPVectorizer.h"
#include "llvm/ADT/DenseMap.h"
#include "llvm/ADT/DenseSet.h"
#include "llvm/ADT/PostOrderIterator.h"
#include "llvm/ADT/PriorityQueue.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/ADT/SetOperations.h"
#include "llvm/ADT/SetVector.h"
#include "llvm/ADT/SmallBitVector.h"
#include "llvm/ADT/SmallPtrSet.h"
#include "llvm/ADT/SmallSet.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/ADT/Statistic.h"
#include "llvm/ADT/iterator.h"
#include "llvm/ADT/iterator_range.h"
#include "llvm/Analysis/AliasAnalysis.h"
#include "llvm/Analysis/AssumptionCache.h"
#include "llvm/Analysis/CodeMetrics.h"
#include "llvm/Analysis/DemandedBits.h"
#include "llvm/Analysis/GlobalsModRef.h"
#include "llvm/Analysis/IVDescriptors.h"
#include "llvm/Analysis/LoopAccessAnalysis.h"
#include "llvm/Analysis/LoopInfo.h"
#include "llvm/Analysis/MemoryLocation.h"
#include "llvm/Analysis/OptimizationRemarkEmitter.h"
#include "llvm/Analysis/ScalarEvolution.h"
#include "llvm/Analysis/ScalarEvolutionExpressions.h"
#include "llvm/Analysis/TargetLibraryInfo.h"
#include "llvm/Analysis/TargetTransformInfo.h"
#include "llvm/Analysis/ValueTracking.h"
#include "llvm/Analysis/VectorUtils.h"
#include "llvm/IR/Attributes.h"
#include "llvm/IR/BasicBlock.h"
#include "llvm/IR/Constant.h"
#include "llvm/IR/Constants.h"
#include "llvm/IR/DataLayout.h"
#include "llvm/IR/DerivedTypes.h"
#include "llvm/IR/Dominators.h"
#include "llvm/IR/Function.h"
#include "llvm/IR/IRBuilder.h"
#include "llvm/IR/InstrTypes.h"
#include "llvm/IR/Instruction.h"
#include "llvm/IR/Instructions.h"
#include "llvm/IR/IntrinsicInst.h"
#include "llvm/IR/Intrinsics.h"
#include "llvm/IR/Module.h"
#include "llvm/IR/Operator.h"
#include "llvm/IR/PatternMatch.h"
#include "llvm/IR/Type.h"
#include "llvm/IR/Use.h"
#include "llvm/IR/User.h"
#include "llvm/IR/Value.h"
#include "llvm/IR/ValueHandle.h"
#include "llvm/Pass.h"
#include "llvm/Support/Casting.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/Compiler.h"
#include "llvm/Support/DOTGraphTraits.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/GraphWriter.h"
#include "llvm/Support/InstructionCost.h"
#include "llvm/Support/KnownBits.h"
#include "llvm/Support/MathExtras.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/Transforms/Utils/InjectTLIMappings.h"
#include "llvm/Transforms/Utils/Local.h"
#include "llvm/Transforms/Utils/LoopUtils.h"
#include <algorithm>
#include <cassert>
#include <cstdint>
#include <iterator>
#include <memory>
#include <optional>
#include <set>
#include <string>
#include <tuple>
#include <utility>
#include <vector>

Classes
class	llvm::slpvectorizer::BoUpSLP
	Bottom Up SLP Vectorizer. More...

struct	llvm::slpvectorizer::BoUpSLP::EdgeInfo
	This structure holds any data we need about the edges being traversed during buildTree_rec(). More...

class	llvm::slpvectorizer::BoUpSLP::LookAheadHeuristics
	A helper class used for scoring candidates for two consecutive lanes. More...

class	llvm::slpvectorizer::BoUpSLP::VLOperands
	A helper data structure to hold the operands of a vector of instructions. More...

struct	llvm::GraphTraits< BoUpSLP * >

struct	llvm::GraphTraits< BoUpSLP * >::ChildIteratorType
	Add the VectorizableTree to the index iterator to be able to return TreeEntry pointers. More...

class	llvm::GraphTraits< BoUpSLP * >::nodes_iterator
	For the node iterator we just need to turn the TreeEntry iterator into a TreeEntry* iterator so that it dereferences to NodeRef. More...

struct	llvm::DOTGraphTraits< BoUpSLP * >

class	llvm::slpvectorizer::BoUpSLP::ShuffleCostEstimator
	Merges shuffle masks and emits final shuffle instruction, if required. More...

class	llvm::slpvectorizer::BoUpSLP::ShuffleInstructionBuilder
	Merges shuffle masks and emits final shuffle instruction, if required. More...

Namespaces
namespace	llvm
	This is an optimization pass for GlobalISel generic memory operations.

namespace	llvm::slpvectorizer
	A private "module" namespace for types and utilities used by this pass.

Macros
#define	SV_NAME "slp-vectorizer"

#define	DEBUG_TYPE "SLP"

Functions
	STATISTIC (NumVectorInstructions, "Number of vector instructions generated")

static bool	isValidElementType (Type *Ty)
	Predicate for the element types that the SLP vectorizer supports.

static bool	isConstant (Value *V)

static bool	isVectorLikeInstWithConstOps (Value *V)
	Checks if `V` is one of vector-like instructions, i.e.

static bool	allSameBlock (ArrayRef< Value * > VL)

static bool	allConstant (ArrayRef< Value * > VL)

static bool	isSplat (ArrayRef< Value * > VL)

static bool	isCommutative (Instruction *I)

static std::optional< unsigned >	getInsertIndex (const Value *InsertInst, unsigned Offset=0)

static SmallBitVector	buildUseMask (int VF, ArrayRef< int > Mask, UseMask MaskArg)
	Prepares a use bitset for the given mask either for the first argument or for the second.

template<bool IsPoisonOnly = false>
static SmallBitVector	isUndefVector (const Value *V, const SmallBitVector &UseMask={})
	Checks if the given value is actually an undefined constant vector.

static std::optional< TargetTransformInfo::ShuffleKind >	isFixedVectorShuffle (ArrayRef< Value * > VL, SmallVectorImpl< int > &Mask)
	Checks if the vector of instructions can be represented as a shuffle, like: x0 = extractelement <4 x i8> x, i32 0 x3 = extractelement <4 x i8> x, i32 3 y1 = extractelement <4 x i8> y, i32 1 y2 = extractelement <4 x i8> y, i32 2 x0x0 = mul i8 x0, x0 x3x3 = mul i8 x3, x3 y1y1 = mul i8 y1, y1 y2y2 = mul i8 y2, y2 ins1 = insertelement <4 x i8> poison, i8 x0x0, i32 0 ins2 = insertelement <4 x i8> ins1, i8 x3x3, i32 1 ins3 = insertelement <4 x i8> ins2, i8 y1y1, i32 2 ins4 = insertelement <4 x i8> ins3, i8 y2y2, i32 3 ret <4 x i8> ins4 can be transformed into: %1 = shufflevector <4 x i8> x, <4 x i8> y, <4 x i32> <i32 0, i32 3, i32 5, i32 6> %2 = mul <4 x i8> %1, %1 ret <4 x i8> %2 We convert this initially to something like: x0 = extractelement <4 x i8> x, i32 0 x3 = extractelement <4 x i8> x, i32 3 y1 = extractelement <4 x i8> y, i32 1 y2 = extractelement <4 x i8> y, i32 2 %1 = insertelement <4 x i8> poison, i8 x0, i32 0 %2 = insertelement <4 x i8> %1, i8 x3, i32 1 %3 = insertelement <4 x i8> %2, i8 y1, i32 2 %4 = insertelement <4 x i8> %3, i8 y2, i32 3 %5 = mul <4 x i8> %4, %4 %6 = extractelement <4 x i8> %5, i32 0 ins1 = insertelement <4 x i8> poison, i8 %6, i32 0 %7 = extractelement <4 x i8> %5, i32 1 ins2 = insertelement <4 x i8> ins1, i8 %7, i32 1 %8 = extractelement <4 x i8> %5, i32 2 ins3 = insertelement <4 x i8> ins2, i8 %8, i32 2 %9 = extractelement <4 x i8> %5, i32 3 ins4 = insertelement <4 x i8> ins3, i8 %9, i32 3 ret <4 x i8> ins4 InstCombiner transforms this into a shuffle and vector mul Mask will return the Shuffle Mask equivalent to the extracted elements.

static std::optional< unsigned >	getExtractIndex (Instruction *E)

static std::optional< TTI::ShuffleKind >	tryToGatherExtractElements (SmallVectorImpl< Value * > &VL, SmallVectorImpl< int > &Mask)
	Tries to find extractelement instructions with constant indices from fixed vector type and gather such instructions into a bunch, which highly likely might be detected as a shuffle of 1 or 2 input vectors.

static Value *	isOneOf (const InstructionsState &S, Value *Op)
	Chooses the correct key for scheduling data.

static bool	isValidForAlternation (unsigned Opcode)

static InstructionsState	getSameOpcode (ArrayRef< Value * > VL, const TargetLibraryInfo &TLI, unsigned BaseIndex=0)

static bool	areCompatibleCmpOps (Value BaseOp0, Value BaseOp1, Value Op0, Value Op1, const TargetLibraryInfo &TLI)
	Checks if the provided operands of 2 cmp instructions are compatible, i.e.

static bool	isCmpSameOrSwapped (const CmpInst BaseCI, const CmpInst CI, const TargetLibraryInfo &TLI)

static bool	allSameType (ArrayRef< Value * > VL)

static bool	InTreeUserNeedToExtract (Value Scalar, Instruction UserInst, TargetLibraryInfo *TLI)

static MemoryLocation	getLocation (Instruction *I)

static bool	isSimple (Instruction *I)

static void	addMask (SmallVectorImpl< int > &Mask, ArrayRef< int > SubMask, bool ExtendingManyInputs=false)
	Shuffles `Mask` in accordance with the given `SubMask`.

static void	fixupOrderingIndices (SmallVectorImpl< unsigned > &Order)
	Order may have elements assigned special value (size) which is out of bounds.

static void	llvm::inversePermutation (ArrayRef< unsigned > Indices, SmallVectorImpl< int > &Mask)

static void	llvm::reorderScalars (SmallVectorImpl< Value * > &Scalars, ArrayRef< int > Mask)
	Reorders the list of scalars in accordance with the given `Mask`.

static bool	llvm::areAllOperandsNonInsts (Value *V)
	Checks if the provided value does not require scheduling.

static bool	llvm::isUsedOutsideBlock (Value *V)
	Checks if the provided value does not require scheduling.

static bool	llvm::doesNotNeedToBeScheduled (Value *V)
	Checks if the specified value does not require scheduling.

static bool	llvm::doesNotNeedToSchedule (ArrayRef< Value * > VL)
	Checks if the specified array of instructions does not require scheduling.

static void	reorderReuses (SmallVectorImpl< int > &Reuses, ArrayRef< int > Mask)
	Reorders the given `Reuses` mask according to the given `Mask`.

static void	reorderOrder (SmallVectorImpl< unsigned > &Order, ArrayRef< int > Mask)
	Reorders the given `Order` according to the given `Mask`.

static bool	arePointersCompatible (Value Ptr1, Value Ptr2, const TargetLibraryInfo &TLI, bool CompareOpcodes=true)

static LoadsState	canVectorizeLoads (ArrayRef< Value * > VL, const Value VL0, const TargetTransformInfo &TTI, const DataLayout &DL, ScalarEvolution &SE, LoopInfo &LI, const TargetLibraryInfo &TLI, SmallVectorImpl< unsigned > &Order, SmallVectorImpl< Value > &PointerOps)
	Checks if the given array of loads can be represented as a vectorized, scatter or just simple gather.

static bool	clusterSortPtrAccesses (ArrayRef< Value * > VL, Type *ElemTy, const DataLayout &DL, ScalarEvolution &SE, SmallVectorImpl< unsigned > &SortedIndices)

static bool	areTwoInsertFromSameBuildVector (InsertElementInst VU, InsertElementInst V, function_ref< Value (InsertElementInst )> GetBaseOperand)
	Check if two insertelement instructions are from the same buildvector.

static bool	isRepeatedNonIdentityClusteredMask (ArrayRef< int > Mask, unsigned Sz)
	Checks if the given mask is a "clustered" mask with the same clusters of size `Sz`, which are not identity submasks.

static LLVM_DUMP_METHOD void	dumpOrder (const BoUpSLP::OrdersType &Order)

static bool	needToScheduleSingleInstruction (ArrayRef< Value * > VL)

static std::pair< size_t, size_t >	generateKeySubkey (Value V, const TargetLibraryInfo TLI, function_ref< hash_code(size_t, LoadInst *)> LoadsSubkeyGenerator, bool AllowAlternate)
	Generates key/subkey pair for the given value to provide effective sorting of the values and better detection of the vectorizable values sequences.

static bool	isAlternateInstruction (const Instruction I, const Instruction MainOp, const Instruction *AltOp, const TargetLibraryInfo &TLI)
	Checks if the specified instruction `I` is an alternate operation for the given `MainOp` and `AltOp` instructions.

static std::pair< InstructionCost, InstructionCost >	getVectorCallCosts (CallInst CI, FixedVectorType VecTy, TargetTransformInfo TTI, TargetLibraryInfo TLI)

static void	buildShuffleEntryMask (ArrayRef< Value * > VL, ArrayRef< unsigned > ReorderIndices, ArrayRef< int > ReusesIndices, const function_ref< bool(Instruction )> IsAltOp, SmallVectorImpl< int > &Mask, SmallVectorImpl< Value > OpScalars=nullptr, SmallVectorImpl< Value > *AltScalars=nullptr)
	Build shuffle mask for shuffle graph entries and lists of main and alternate operations operands.

static bool	isLoadCombineCandidateImpl (Value Root, unsigned NumElts, TargetTransformInfo TTI, bool MustMatchOrInst)

static bool	isFirstInsertElement (const InsertElementInst IE1, const InsertElementInst IE2)
	Checks if the `IE1` instructions is followed by `IE2` instruction in the buildvector sequence.

template<typename T >
static T *	performExtractsShuffleAction (MutableArrayRef< std::pair< T , SmallVector< int > > > ShuffleMask, Value Base, function_ref< unsigned(T )> GetVF, function_ref< std::pair< T , bool >(T , ArrayRef< int >, bool)> ResizeAction, function_ref< T (ArrayRef< int >, ArrayRef< T * >)> Action)
	Does the analysis of the provided shuffle masks and performs the requested actions on the vectors with the given shuffle masks.

static bool	collectValuesToDemote (Value V, SmallPtrSetImpl< Value > &Expr, SmallVectorImpl< Value * > &ToDemote, SmallVectorImpl< Value * > &Roots)

static std::optional< unsigned >	getAggregateSize (Instruction *InsertInst)

static void	findBuildAggregate_rec (Instruction LastInsertInst, TargetTransformInfo TTI, SmallVectorImpl< Value * > &BuildVectorOpds, SmallVectorImpl< Value * > &InsertElts, unsigned OperandOffset)

static bool	findBuildAggregate (Instruction LastInsertInst, TargetTransformInfo TTI, SmallVectorImpl< Value * > &BuildVectorOpds, SmallVectorImpl< Value * > &InsertElts)
	Recognize construction of vectors like ra = insertelement <4 x float> poison, float s0, i32 0 rb = insertelement <4 x float> ra, float s1, i32 1 rc = insertelement <4 x float> rb, float s2, i32 2 rd = insertelement <4 x float> rc, float s3, i32 3 starting from the last insertelement or insertvalue instruction.

static Instruction *	getReductionInstr (const DominatorTree DT, PHINode P, BasicBlock ParentBB, LoopInfo LI)
	Try and get a reduction instruction from a phi node.

static bool	matchRdxBop (Instruction I, Value &V0, Value *&V1)

static Instruction *	tryGetSecondaryReductionRoot (PHINode Phi, Instruction Root)
	We could have an initial reduction that is not an add.

static Instruction *	getNonPhiOperand (Instruction I, PHINode Phi)
	`Returns` the first operand of `I` that does not match `Phi`.

static bool	isReductionCandidate (Instruction *I)
	\Returns true if `I` is a candidate instruction for reduction vectorization.

template<typename T >
static bool	tryToVectorizeSequence (SmallVectorImpl< T * > &Incoming, function_ref< bool(T , T )> Comparator, function_ref< bool(T , T )> AreCompatible, function_ref< bool(ArrayRef< T * >, bool)> TryToVectorizeHelper, bool MaxVFOnly, BoUpSLP &R)

template<bool IsCompatibility>
static bool	compareCmp (Value V, Value V2, TargetLibraryInfo &TLI, function_ref< bool(Instruction *)> IsDeleted)
	Compare two cmp instructions.

Variables
cl::opt< bool >	RunSLPVectorization ("vectorize-slp", cl::init(true), cl::Hidden, cl::desc("Run the SLP vectorization passes"))

static cl::opt< int >	SLPCostThreshold ("slp-threshold", cl::init(0), cl::Hidden, cl::desc("Only vectorize if you gain more than this " "number "))

static cl::opt< bool >	ShouldVectorizeHor ("slp-vectorize-hor", cl::init(true), cl::Hidden, cl::desc("Attempt to vectorize horizontal reductions"))

static cl::opt< bool >	ShouldStartVectorizeHorAtStore ("slp-vectorize-hor-store", cl::init(false), cl::Hidden, cl::desc("Attempt to vectorize horizontal reductions feeding into a store"))

static cl::opt< bool >	AllowHorRdxIdenityOptimization ("slp-optimize-identity-hor-reduction-ops", cl::init(true), cl::Hidden, cl::desc("Allow optimization of original scalar identity operations on " "matched horizontal reductions."))

static cl::opt< int >	MaxVectorRegSizeOption ("slp-max-reg-size", cl::init(128), cl::Hidden, cl::desc("Attempt to vectorize for this register size in bits"))

static cl::opt< unsigned >	MaxVFOption ("slp-max-vf", cl::init(0), cl::Hidden, cl::desc("Maximum SLP vectorization factor (0=unlimited)"))

static cl::opt< int >	MaxStoreLookup ("slp-max-store-lookup", cl::init(32), cl::Hidden, cl::desc("Maximum depth of the lookup for consecutive stores."))

static cl::opt< int >	ScheduleRegionSizeBudget ("slp-schedule-budget", cl::init(100000), cl::Hidden, cl::desc("Limit the size of the SLP scheduling region per block"))
	Limits the size of scheduling regions in a block.

static cl::opt< int >	MinVectorRegSizeOption ("slp-min-reg-size", cl::init(128), cl::Hidden, cl::desc("Attempt to vectorize for this register size in bits"))

static cl::opt< unsigned >	RecursionMaxDepth ("slp-recursion-max-depth", cl::init(12), cl::Hidden, cl::desc("Limit the recursion depth when building a vectorizable tree"))

static cl::opt< unsigned >	MinTreeSize ("slp-min-tree-size", cl::init(3), cl::Hidden, cl::desc("Only vectorize small trees if they are fully vectorizable"))

static cl::opt< int >	LookAheadMaxDepth ("slp-max-look-ahead-depth", cl::init(2), cl::Hidden, cl::desc("The maximum look-ahead depth for operand reordering scores"))

static cl::opt< int >	RootLookAheadMaxDepth ("slp-max-root-look-ahead-depth", cl::init(2), cl::Hidden, cl::desc("The maximum look-ahead depth for searching best rooting option"))

static cl::opt< bool >	ViewSLPTree ("view-slp-tree", cl::Hidden, cl::desc("Display the SLP trees with Graphviz"))

static const unsigned	AliasedCheckLimit = 10

static const unsigned	MaxMemDepDistance = 160

static const int	MinScheduleRegionSize = 16
	If the ScheduleRegionSizeBudget is exhausted, we allow small scheduling regions to be handled.

Macro Definition Documentation

◆ DEBUG_TYPE

#define DEBUG_TYPE "SLP"

Definition at line 107 of file SLPVectorizer.cpp.

◆ SV_NAME

#define SV_NAME "slp-vectorizer"

Definition at line 106 of file SLPVectorizer.cpp.

Function Documentation

◆ addMask()

static void addMask	(	SmallVectorImpl< int > &	Mask,
		ArrayRef< int >	SubMask,
		bool	ExtendingManyInputs = `false`
	)

static

Shuffles Mask in accordance with the given SubMask.

Parameters

ExtendingManyInputs Supports reshuffling of the mask with not only one but two input vectors.

Definition at line 951 of file SLPVectorizer.cpp.

References assert(), llvm::ArrayRef< T >::begin(), E, llvm::ArrayRef< T >::empty(), llvm::ArrayRef< T >::end(), I, llvm::PoisonMaskElem, and llvm::ArrayRef< T >::size().

Referenced by llvm::slpvectorizer::BoUpSLP::reorderTopToBottom().

◆ allConstant()

static bool allConstant ( ArrayRef< Value * > VL )

static

Returns: True if all of the values in VL are constants (but not globals/constant expressions).

Definition at line 258 of file SLPVectorizer.cpp.

References llvm::all_of(), and isConstant().

Referenced by llvm::slpvectorizer::BoUpSLP::getReorderingData(), and llvm::slpvectorizer::BoUpSLP::isTreeTinyAndNotFullyVectorizable().

◆ allSameBlock()

static bool allSameBlock ( ArrayRef< Value * > VL )

static

Returns: true if all of the instructions in VL are in the same block or false otherwise.

Definition at line 237 of file SLPVectorizer.cpp.

References llvm::all_of(), E, llvm::BasicBlock::getParent(), llvm::Instruction::getParent(), I, isVectorLikeInstWithConstOps(), and llvm::ArrayRef< T >::size().

◆ allSameType()

static bool allSameType ( ArrayRef< Value * > VL )

static

Returns: true if all of the values in VL have the same type or false otherwise.

Definition at line 891 of file SLPVectorizer.cpp.

References getType(), and llvm::ArrayRef< T >::size().

Referenced by llvm::slpvectorizer::BoUpSLP::buildTree(), and llvm::slpvectorizer::BoUpSLP::getReorderingData().

◆ areCompatibleCmpOps()

static bool areCompatibleCmpOps	(	Value *	BaseOp0,
		Value *	BaseOp1,
		Value *	Op0,
		Value *	Op1,
		const TargetLibraryInfo &	TLI
	)

static

Checks if the provided operands of 2 cmp instructions are compatible, i.e.

compatible instructions or constants, or just some other regular values.

Definition at line 716 of file SLPVectorizer.cpp.

References getOpcode(), getSameOpcode(), and isConstant().

Referenced by isCmpSameOrSwapped().

◆ arePointersCompatible()

static bool arePointersCompatible	(	Value *	Ptr1,
		Value *	Ptr2,
		const TargetLibraryInfo &	TLI,
		bool	CompareOpcodes = `true`
	)

static

Definition at line 3826 of file SLPVectorizer.cpp.

References getOpcode(), getSameOpcode(), llvm::getUnderlyingObject(), and isConstant().

Referenced by canVectorizeLoads().

◆ areTwoInsertFromSameBuildVector()

static bool areTwoInsertFromSameBuildVector	(	InsertElementInst *	VU,
		InsertElementInst *	V,
		function_ref< Value (InsertElementInst )>	GetBaseOperand
	)

static

Check if two insertelement instructions are from the same buildvector.

Definition at line 4014 of file SLPVectorizer.cpp.

References getInsertIndex(), llvm::Instruction::getParent(), llvm::InsertElementInst::getType(), llvm::Value::hasOneUse(), and llvm::SmallSet< T, N, C >::insert().

Referenced by llvm::slpvectorizer::BoUpSLP::getReorderingData(), llvm::slpvectorizer::BoUpSLP::getTreeCost(), and llvm::slpvectorizer::BoUpSLP::vectorizeTree().

◆ buildShuffleEntryMask()

static void buildShuffleEntryMask	(	ArrayRef< Value * >	VL,
		ArrayRef< unsigned >	ReorderIndices,
		ArrayRef< int >	ReusesIndices,
		const function_ref< bool(Instruction *)>	IsAltOp,
		SmallVectorImpl< int > &	Mask,
		SmallVectorImpl< Value * > *	OpScalars = `nullptr`,
		SmallVectorImpl< Value * > *	AltScalars = `nullptr`
	)

static

Build shuffle mask for shuffle graph entries and lists of main and alternate operations operands.

Definition at line 6300 of file SLPVectorizer.cpp.

References llvm::SmallVectorTemplateCommon< T, typename >::begin(), llvm::ArrayRef< T >::empty(), I, Idx, llvm::inversePermutation(), llvm::PoisonMaskElem, llvm::ArrayRef< T >::size(), and llvm::transform().

◆ buildUseMask()

static SmallBitVector buildUseMask	(	int	VF,
		ArrayRef< int >	Mask,
		UseMask	MaskArg
	)

static

Prepares a use bitset for the given mask either for the first argument or for the second.

Definition at line 348 of file SLPVectorizer.cpp.

References llvm::enumerate(), Idx, and llvm::PoisonMaskElem.

Referenced by performExtractsShuffleAction().

◆ canVectorizeLoads()

static LoadsState canVectorizeLoads	(	ArrayRef< Value * >	VL,
		const Value *	VL0,
		const TargetTransformInfo &	TTI,
		const DataLayout &	DL,
		ScalarEvolution &	SE,
		LoopInfo &	LI,
		const TargetLibraryInfo &	TLI,
		SmallVectorImpl< unsigned > &	Order,
		SmallVectorImpl< Value * > &	PointerOps
	)

static

Checks if the given array of loads can be represented as a vectorized, scatter or just simple gather.

Definition at line 3847 of file SLPVectorizer.cpp.

References llvm::all_of(), arePointersCompatible(), llvm::SmallVectorTemplateCommon< T, typename >::back(), llvm::SmallVectorTemplateCommon< T, typename >::begin(), llvm::SmallVectorImpl< T >::clear(), llvm::count_if(), DL, llvm::doesNotNeedToBeScheduled(), llvm::SmallVectorBase< Size_T >::empty(), llvm::TargetTransformInfo::forceScalarizeMaskedGather(), llvm::SmallVectorTemplateCommon< T, typename >::front(), GEP, llvm::FixedVectorType::get(), llvm::getAlign(), llvm::LoopInfoBase< BlockT, LoopT >::getLoopFor(), getParent(), llvm::getPointersDiff(), llvm::Value::getType(), llvm::TargetTransformInfo::isLegalMaskedGather(), P, llvm::SmallVectorImpl< T >::resize(), llvm::ArrayRef< T >::size(), and llvm::sortPtrAccesses().

◆ clusterSortPtrAccesses()

static bool clusterSortPtrAccesses	(	ArrayRef< Value * >	VL,
		Type *	ElemTy,
		const DataLayout &	DL,
		ScalarEvolution &	SE,
		SmallVectorImpl< unsigned > &	SortedIndices
	)

static

◆ collectValuesToDemote()

static bool collectValuesToDemote	(	Value *	V,
		SmallPtrSetImpl< Value * > &	Expr,
		SmallVectorImpl< Value * > &	ToDemote,
		SmallVectorImpl< Value * > &	Roots
	)

static

Definition at line 11900 of file SLPVectorizer.cpp.

References collectValuesToDemote(), llvm::SmallPtrSetImpl< PtrType >::count(), I, llvm::PHINode::incoming_values(), llvm::SmallVectorTemplateBase< T, bool >::push_back(), and SI.

Referenced by collectValuesToDemote(), and llvm::slpvectorizer::BoUpSLP::computeMinimumValueSizes().

◆ compareCmp()

template<bool IsCompatibility>

static bool compareCmp	(	Value *	V,
		Value *	V2,
		TargetLibraryInfo &	TLI,
		function_ref< bool(Instruction *)>	IsDeleted
	)

static

Compare two cmp instructions.

If IsCompatibility is true, function returns true if 2 cmps have same/swapped predicates and mos compatible corresponding operands. If IsCompatibility is false, function implements strict weak ordering relation between two cmp instructions, returning true if the first instruction is "less" than the second, i.e. its predicate is less than the predicate of the second or the operands IDs are less than the operands IDs of the second cmp instruction.

Definition at line 14400 of file SLPVectorizer.cpp.

References E, llvm::User::getOperand(), getSameOpcode(), llvm::CmpInst::getSwappedPredicate(), llvm::Value::getType(), llvm::Type::getTypeID(), llvm::Value::getValueID(), I, and isValidElementType().

◆ dumpOrder()

static LLVM_DUMP_METHOD void dumpOrder ( const BoUpSLP::OrdersType & Order )

static

Definition at line 4995 of file SLPVectorizer.cpp.

References llvm::dbgs(), and Idx.

◆ findBuildAggregate()

static bool findBuildAggregate	(	Instruction *	LastInsertInst,
		TargetTransformInfo *	TTI,
		SmallVectorImpl< Value * > &	BuildVectorOpds,
		SmallVectorImpl< Value * > &	InsertElts
	)

static

Recognize construction of vectors like ra = insertelement <4 x float> poison, float s0, i32 0 rb = insertelement <4 x float> ra, float s1, i32 1 rc = insertelement <4 x float> rb, float s2, i32 2 rd = insertelement <4 x float> rc, float s3, i32 3 starting from the last insertelement or insertvalue instruction.

Also recognize homogeneous aggregates like {<2 x float>, <2 x float>}, {{float, float}, {float, float}}, [2 x {float, float}] and so on. See llvm/test/Transforms/SLPVectorizer/X86/pr42022.ll for examples.

Assume LastInsertInst is of InsertElementInst or InsertValueInst type.

Returns: true if it matches.

Definition at line 14032 of file SLPVectorizer.cpp.

References assert(), llvm::SmallVectorBase< Size_T >::empty(), llvm::erase_value(), findBuildAggregate_rec(), getAggregateSize(), llvm::SmallVectorImpl< T >::resize(), and llvm::SmallVectorBase< Size_T >::size().

◆ findBuildAggregate_rec()

static void findBuildAggregate_rec	(	Instruction *	LastInsertInst,
		TargetTransformInfo *	TTI,
		SmallVectorImpl< Value * > &	BuildVectorOpds,
		SmallVectorImpl< Value * > &	InsertElts,
		unsigned	OperandOffset
	)

static

Definition at line 13993 of file SLPVectorizer.cpp.

References findBuildAggregate_rec(), getInsertIndex(), llvm::User::getOperand(), and llvm::Value::hasOneUse().

Referenced by findBuildAggregate(), and findBuildAggregate_rec().

◆ fixupOrderingIndices()

static void fixupOrderingIndices ( SmallVectorImpl< unsigned > & Order )

static

Order may have elements assigned special value (size) which is out of bounds.

Such indices only appear on places which correspond to undef values (see canReuseExtract for details) and used in order to avoid undef values have effect on operands ordering. The first loop below simply finds all unused indices and then the next loop nest assigns these indices for undef values positions. As an example below Order has two undef positions and they have assigned values 3 and 7 respectively: before: 6 9 5 4 9 2 1 0 after: 6 3 5 4 7 2 1 0

Definition at line 983 of file SLPVectorizer.cpp.

References assert(), llvm::SmallBitVector::count(), llvm::SmallBitVector::find_first(), llvm::SmallBitVector::find_next(), I, Idx, llvm::SmallBitVector::none(), llvm::SmallBitVector::reset(), llvm::SmallBitVector::set(), and llvm::SmallVectorBase< Size_T >::size().

Referenced by llvm::slpvectorizer::BoUpSLP::getReorderingData(), llvm::slpvectorizer::BoUpSLP::reorderBottomToTop(), reorderOrder(), and llvm::slpvectorizer::BoUpSLP::reorderTopToBottom().

◆ generateKeySubkey()

static std::pair< size_t, size_t > generateKeySubkey	(	Value *	V,
		const TargetLibraryInfo *	TLI,
		function_ref< hash_code(size_t, LoadInst *)>	LoadsSubkeyGenerator,
		bool	AllowAlternate
	)

static

Generates key/subkey pair for the given value to provide effective sorting of the values and better detection of the vectorizable values sequences.

The keys/subkeys can be used for better sorting of the values themselves (keys) and in values subgroups (subkeys).

Definition at line 5072 of file SLPVectorizer.cpp.

References llvm::SmallBitVector::all(), generateKeySubkey(), llvm::CmpInst::getInversePredicate(), llvm::VFDatabase::getMappings(), llvm::CmpInst::getSwappedPredicate(), llvm::getVectorIntrinsicIDForCall(), llvm::hash_combine(), llvm::hash_value(), I, llvm::Instruction::isIntDivRem(), llvm::isTriviallyVectorizable(), isUndefVector(), isValidForAlternation(), and isVectorLikeInstWithConstOps().

Referenced by generateKeySubkey().

◆ getAggregateSize()

static std::optional< unsigned > getAggregateSize ( Instruction * InsertInst )

static

Definition at line 13965 of file SLPVectorizer.cpp.

References llvm::Type::isSingleValueType(), and IV.

Referenced by findBuildAggregate().

◆ getExtractIndex()

static std::optional< unsigned > getExtractIndex ( Instruction * E )

static

Returns: True if Extract{Value,Element} instruction extracts element Idx.

Definition at line 525 of file SLPVectorizer.cpp.

References assert(), and E.

Referenced by llvm::slpvectorizer::BoUpSLP::ShuffleCostEstimator::adjustExtracts(), llvm::slpvectorizer::BoUpSLP::getReorderingData(), and tryToGatherExtractElements().

◆ getInsertIndex()

static std::optional< unsigned > getInsertIndex	(	const Value *	InsertInst,
		unsigned	Offset = `0`
	)

static

Returns: inserting index of InsertElement or InsertValue instruction, using Offset as base offset for index.

Definition at line 295 of file SLPVectorizer.cpp.

References I, IV, and llvm::Offset.

Referenced by areTwoInsertFromSameBuildVector(), findBuildAggregate_rec(), llvm::slpvectorizer::BoUpSLP::getReorderingData(), llvm::slpvectorizer::BoUpSLP::getTreeCost(), isFirstInsertElement(), and llvm::slpvectorizer::BoUpSLP::vectorizeTree().

◆ getLocation()

static MemoryLocation getLocation ( Instruction * I )

static

Returns: the AA location that is being access by the instruction.

Definition at line 929 of file SLPVectorizer.cpp.

References llvm::MemoryLocation::get(), I, and SI.

◆ getNonPhiOperand()

static Instruction * getNonPhiOperand	(	Instruction *	I,
		PHINode *	Phi
	)

static

Returns the first operand of I that does not match Phi.

If operand is not an instruction it returns nullptr.

Definition at line 14150 of file SLPVectorizer.cpp.

References I, and matchRdxBop().

◆ getReductionInstr()

static Instruction * getReductionInstr	(	const DominatorTree *	DT,
		PHINode *	P,
		BasicBlock *	ParentBB,
		LoopInfo *	LI
	)

static

Try and get a reduction instruction from a phi node.

Given a phi node P in a block ParentBB, consider possible reductions if they come from either ParentBB or a containing loop latch.

Returns: A candidate reduction value if possible, or
nullptr

if not possible.

Definition at line 14066 of file SLPVectorizer.cpp.

References llvm::DominatorTree::dominates(), llvm::LoopInfoBase< BlockT, LoopT >::getLoopFor(), llvm::LoopBase< BlockT, LoopT >::getLoopLatch(), and P.

◆ getSameOpcode()

static InstructionsState getSameOpcode	(	ArrayRef< Value * >	VL,
		const TargetLibraryInfo &	TLI,
		unsigned	BaseIndex
	)

static

Returns: analysis of the Instructions in VL described in InstructionsState, the Opcode that we suppose the whole list could be vectorized even if its structure is diverse.

Definition at line 752 of file SLPVectorizer.cpp.

References llvm::any_of(), assert(), llvm::CmpInst::BAD_ICMP_PREDICATE, E, llvm::SmallVectorBase< Size_T >::empty(), llvm::SmallVectorTemplateCommon< T, typename >::front(), llvm::CallBase::getBundleOperandsStartIndex(), llvm::CallBase::getCalledFunction(), llvm::VFDatabase::getMappings(), llvm::CmpInst::getSwappedPredicate(), llvm::Value::getType(), llvm::getVectorIntrinsicIDForCall(), I, isCmpSameOrSwapped(), llvm::isTriviallyVectorizable(), isValidForAlternation(), isVectorLikeInstWithConstOps(), llvm::User::op_begin(), llvm::ArrayRef< T >::size(), and llvm::SmallVectorBase< Size_T >::size().

Referenced by areCompatibleCmpOps(), arePointersCompatible(), compareCmp(), llvm::slpvectorizer::BoUpSLP::LookAheadHeuristics::getShallowScore(), and llvm::slpvectorizer::BoUpSLP::VLOperands::reorder().

◆ getVectorCallCosts()

static std::pair< InstructionCost, InstructionCost > getVectorCallCosts	(	CallInst *	CI,
		FixedVectorType *	VecTy,
		TargetTransformInfo *	TTI,
		TargetLibraryInfo *	TLI
	)

static

Definition at line 6265 of file SLPVectorizer.cpp.

References Arg, llvm::CallBase::args(), Arguments, llvm::VFShape::get(), llvm::FixedVectorType::get(), llvm::TargetTransformInfo::getCallInstrCost(), llvm::ElementCount::getFixed(), llvm::TargetTransformInfo::getIntrinsicInstrCost(), llvm::FixedVectorType::getNumElements(), llvm::getVectorIntrinsicIDForCall(), llvm::VFDatabase::getVectorizedFunction(), llvm::CallBase::isNoBuiltin(), llvm::SmallVectorTemplateBase< T, bool >::push_back(), and llvm::TargetTransformInfo::TCK_RecipThroughput.

◆ InTreeUserNeedToExtract()

static bool InTreeUserNeedToExtract	(	Value *	Scalar,
		Instruction *	UserInst,
		TargetLibraryInfo *	TLI
	)

static

Returns: True if in-tree use also needs extract. This refers to possible scalar operand in vectorized instruction.

Definition at line 902 of file SLPVectorizer.cpp.

References llvm::CallBase::arg_size(), llvm::CallBase::getArgOperand(), llvm::Instruction::getOpcode(), llvm::LoadInst::getPointerOperand(), llvm::getVectorIntrinsicIDForCall(), llvm::isVectorIntrinsicWithScalarOpAtArg(), and SI.

Referenced by llvm::slpvectorizer::BoUpSLP::buildExternalUses().

◆ isAlternateInstruction()

static bool isAlternateInstruction	(	const Instruction *	I,
		const Instruction *	MainOp,
		const Instruction *	AltOp,
		const TargetLibraryInfo &	TLI
	)

static

Checks if the specified instruction I is an alternate operation for the given MainOp and AltOp instructions.

Definition at line 6335 of file SLPVectorizer.cpp.

References assert(), llvm::Instruction::getOpcode(), llvm::CmpInst::getSwappedPredicate(), I, isCmpSameOrSwapped(), and P.

◆ isCmpSameOrSwapped()

static bool isCmpSameOrSwapped	(	const CmpInst *	BaseCI,
		const CmpInst *	CI,
		const TargetLibraryInfo &	TLI
	)

static

Returns: true if a compare instruction CI has similar "look" and same predicate as BaseCI, "as is" or with its operands and predicate swapped, false otherwise.

Definition at line 730 of file SLPVectorizer.cpp.

References areCompatibleCmpOps(), assert(), llvm::User::getOperand(), llvm::CmpInst::getPredicate(), llvm::CmpInst::getSwappedPredicate(), and llvm::Value::getType().

Referenced by getSameOpcode(), and isAlternateInstruction().

◆ isCommutative()

static bool isCommutative ( Instruction * I )

static

Returns: True if I is commutative, handles CmpInst and BinaryOperator.

Definition at line 282 of file SLPVectorizer.cpp.

References I.

Referenced by llvm::slpvectorizer::BoUpSLP::LookAheadHeuristics::getScoreAtLevelRec(), and llvm::FastISel::selectBinaryOp().

◆ isConstant()

static bool isConstant ( Value * V )

static

Returns: True if the value is a constant (but not globals/constant expressions).

Definition at line 213 of file SLPVectorizer.cpp.

Referenced by allConstant(), areCompatibleCmpOps(), and isVectorLikeInstWithConstOps().

◆ isFirstInsertElement()

static bool isFirstInsertElement	(	const InsertElementInst *	IE1,
		const InsertElementInst *	IE2
	)

static

Checks if the IE1 instructions is followed by IE2 instruction in the buildvector sequence.

Definition at line 8197 of file SLPVectorizer.cpp.

References getInsertIndex(), llvm::Value::hasOneUse(), and llvm_unreachable.

Referenced by llvm::slpvectorizer::BoUpSLP::getTreeCost(), and llvm::slpvectorizer::BoUpSLP::vectorizeTree().

◆ isFixedVectorShuffle()

static std::optional< TargetTransformInfo::ShuffleKind > isFixedVectorShuffle	(	ArrayRef< Value * >	VL,
		SmallVectorImpl< int > &	Mask
	)

static

Checks if the vector of instructions can be represented as a shuffle, like: x0 = extractelement <4 x i8> x, i32 0 x3 = extractelement <4 x i8> x, i32 3 y1 = extractelement <4 x i8> y, i32 1 y2 = extractelement <4 x i8> y, i32 2 x0x0 = mul i8 x0, x0 x3x3 = mul i8 x3, x3 y1y1 = mul i8 y1, y1 y2y2 = mul i8 y2, y2 ins1 = insertelement <4 x i8> poison, i8 x0x0, i32 0 ins2 = insertelement <4 x i8> ins1, i8 x3x3, i32 1 ins3 = insertelement <4 x i8> ins2, i8 y1y1, i32 2 ins4 = insertelement <4 x i8> ins3, i8 y2y2, i32 3 ret <4 x i8> ins4 can be transformed into: %1 = shufflevector <4 x i8> x, <4 x i8> y, <4 x i32> <i32 0, i32 3, i32 5, i32 6> %2 = mul <4 x i8> %1, %1 ret <4 x i8> %2 We convert this initially to something like: x0 = extractelement <4 x i8> x, i32 0 x3 = extractelement <4 x i8> x, i32 3 y1 = extractelement <4 x i8> y, i32 1 y2 = extractelement <4 x i8> y, i32 2 %1 = insertelement <4 x i8> poison, i8 x0, i32 0 %2 = insertelement <4 x i8> %1, i8 x3, i32 1 %3 = insertelement <4 x i8> %2, i8 y1, i32 2 %4 = insertelement <4 x i8> %3, i8 y2, i32 3 %5 = mul <4 x i8> %4, %4 %6 = extractelement <4 x i8> %5, i32 0 ins1 = insertelement <4 x i8> poison, i8 %6, i32 0 %7 = extractelement <4 x i8> %5, i32 1 ins2 = insertelement <4 x i8> ins1, i8 %7, i32 1 %8 = extractelement <4 x i8> %5, i32 2 ins3 = insertelement <4 x i8> ins2, i8 %8, i32 2 %9 = extractelement <4 x i8> %5, i32 3 ins4 = insertelement <4 x i8> ins3, i8 %9, i32 3 ret <4 x i8> ins4 InstCombiner transforms this into a shuffle and vector mul Mask will return the Shuffle Mask equivalent to the extracted elements.

TODO: Can we split off and reuse the shuffle mask detection from ShuffleVectorInst/getShuffleCost?

Definition at line 456 of file SLPVectorizer.cpp.

References E, llvm::ArrayRef< T >::end(), llvm::find_if(), I, Idx, isUndefVector(), llvm::PoisonMaskElem, Select, llvm::ArrayRef< T >::size(), Size, llvm::TargetTransformInfo::SK_PermuteSingleSrc, llvm::TargetTransformInfo::SK_PermuteTwoSrc, llvm::TargetTransformInfo::SK_Select, and Unknown.

Referenced by tryToGatherExtractElements().

◆ isLoadCombineCandidateImpl()

static bool isLoadCombineCandidateImpl	(	Value *	Root,
		unsigned	NumElts,
		TargetTransformInfo *	TTI,
		bool	MustMatchOrInst
	)

static

Definition at line 7986 of file SLPVectorizer.cpp.

References llvm::dbgs(), llvm::IntegerType::get(), llvm::Value::getContext(), llvm::Type::getIntegerBitWidth(), llvm::TargetTransformInfo::isTypeLegal(), LLVM_DEBUG, llvm::PatternMatch::m_APInt(), llvm::PatternMatch::m_Or(), llvm::PatternMatch::m_Shl(), llvm::PatternMatch::m_Value(), llvm::PatternMatch::m_ZExt(), llvm::PatternMatch::match(), and llvm::APInt::urem().

Referenced by llvm::slpvectorizer::BoUpSLP::isLoadCombineCandidate(), and llvm::slpvectorizer::BoUpSLP::isLoadCombineReductionCandidate().

◆ isOneOf()

static Value * isOneOf	(	const InstructionsState &	S,
		Value *	Op
	)

static

Chooses the correct key for scheduling data.

If Op has the same (or alternate) opcode as OpValue, the key is Op. Otherwise the key is OpValue.

Definition at line 691 of file SLPVectorizer.cpp.

References I.

◆ isReductionCandidate()

static bool isReductionCandidate ( Instruction * I )

static

\Returns true if I is a candidate instruction for reduction vectorization.

Definition at line 14159 of file SLPVectorizer.cpp.

References I, llvm::PatternMatch::m_Select(), llvm::PatternMatch::m_Value(), llvm::PatternMatch::match(), and matchRdxBop().

◆ isRepeatedNonIdentityClusteredMask()

static bool isRepeatedNonIdentityClusteredMask	(	ArrayRef< int >	Mask,
		unsigned	Sz
	)

static

Checks if the given mask is a "clustered" mask with the same clusters of size Sz, which are not identity submasks.

Definition at line 4250 of file SLPVectorizer.cpp.

References E, I, and llvm::ShuffleVectorInst::isIdentityMask().

◆ isSimple()

static bool isSimple ( Instruction * I )

static

Returns: True if the instruction is not a volatile or atomic load/store.

Definition at line 938 of file SLPVectorizer.cpp.

References I, MI, and SI.

Referenced by llvm::DOTGraphTraits< DOTFuncInfo * >::getNodeLabel(), llvm::DOTGraphTraits< MachineBlockFrequencyInfo * >::getNodeLabel(), llvm::DOTGraphTraits< const MachineFunction * >::getNodeLabel(), llvm::DOTGraphTraits< DOTMachineFuncInfo * >::getNodeLabel(), llvm::DOTGraphTraits< DomTreeNode * >::getNodeLabel(), llvm::DOTGraphTraits< RegionNode * >::getNodeLabel(), llvm::X86TargetLowering::shouldReduceLoadWidth(), llvm::MBFIWrapper::view(), and llvm::MachineBlockFrequencyInfo::view().

◆ isSplat()

static bool isSplat ( ArrayRef< Value * > VL )

static

Returns: True if all of the values in VL are identical or some of them are UndefValue.

Definition at line 266 of file SLPVectorizer.cpp.

◆ isUndefVector()

template<bool IsPoisonOnly = false>

static SmallBitVector isUndefVector	(	const Value *	V,
		const SmallBitVector &	UseMask = `{}`
	)

static

Checks if the given value is actually an undefined constant vector.

Also, if the UseMask is not empty, tries to check if the non-masked elements actually mask the insertelement buildvector, if any.

Definition at line 369 of file SLPVectorizer.cpp.

Referenced by generateKeySubkey(), llvm::slpvectorizer::BoUpSLP::LookAheadHeuristics::getShallowScore(), isFixedVectorShuffle(), performExtractsShuffleAction(), and tryToGatherExtractElements().

◆ isValidElementType()

static bool isValidElementType ( Type * Ty )

static

Predicate for the element types that the SLP vectorizer supports.

The most important thing to filter here are types which are invalid in LLVM vectors. We also filter target specific types which have absolutely no meaningful vectorization path such as x86_fp80 and ppc_f128. This just avoids spending time checking the cost model and realizing that they will be inevitably scalarized.

Definition at line 206 of file SLPVectorizer.cpp.

References llvm::Type::isPPC_FP128Ty(), and llvm::Type::isX86_FP80Ty().

Referenced by llvm::slpvectorizer::BoUpSLP::canMapToVector(), compareCmp(), and llvm::slpvectorizer::BoUpSLP::LookAheadHeuristics::getShallowScore().

◆ isValidForAlternation()

static bool isValidForAlternation ( unsigned Opcode )

static

Returns: true if Opcode is allowed as part of of the main/alternate instruction for SLP vectorization.

Example of unsupported opcode is SDIV that can potentially cause UB if the "shuffled out" lane would result in division by zero.

Definition at line 703 of file SLPVectorizer.cpp.

References llvm::Instruction::isIntDivRem().

Referenced by generateKeySubkey(), and getSameOpcode().

◆ isVectorLikeInstWithConstOps()

static bool isVectorLikeInstWithConstOps ( Value * V )

static

Checks if V is one of vector-like instructions, i.e.

undef, insertelement/extractelement with constant indices for fixed vector type or extractvalue instruction.

Definition at line 220 of file SLPVectorizer.cpp.

References assert(), I, and isConstant().

Referenced by allSameBlock(), generateKeySubkey(), and getSameOpcode().

◆ matchRdxBop()

static bool matchRdxBop	(	Instruction *	I,
		Value *&	V0,
		Value *&	V1
	)

static

Definition at line 14110 of file SLPVectorizer.cpp.

References I, llvm::PatternMatch::m_BinOp(), llvm::PatternMatch::m_Value(), and llvm::PatternMatch::match().

Referenced by getNonPhiOperand(), and isReductionCandidate().

◆ needToScheduleSingleInstruction()

static bool needToScheduleSingleInstruction ( ArrayRef< Value * > VL )

static

Returns: true if the specified list of values has only one instruction that requires scheduling, false otherwise.

Definition at line 5053 of file SLPVectorizer.cpp.

References llvm::doesNotNeedToBeScheduled().

◆ performExtractsShuffleAction()

template<typename T >

static T * performExtractsShuffleAction	(	MutableArrayRef< std::pair< T *, SmallVector< int > > >	ShuffleMask,
		Value *	Base,
		function_ref< unsigned(T *)>	GetVF,
		function_ref< std::pair< T , bool >(T , ArrayRef< int >, bool)>	ResizeAction,
		function_ref< T (ArrayRef< int >, ArrayRef< T >)>	Action
	)

static

Does the analysis of the provided shuffle masks and performs the requested actions on the vectors with the given shuffle masks.

It tries to do it in several steps.

If the Base vector is not undef vector, resizing the very first mask to have common VF and perform action for 2 input vectors (including non-undef Base). Other shuffle masks are combined with the resulting after the 1 stage and processed as a shuffle of 2 elements.
If the Base is undef vector and have only 1 shuffle mask, perform the action only for 1 vector with the given mask, if it is not the identity mask.
If > 2 masks are used, perform the remaining shuffle actions for 2 vectors, combing the masks properly between the steps.

Definition at line 8252 of file SLPVectorizer.cpp.

References llvm::SmallBitVector::all(), assert(), llvm::sampleprof::Base, buildUseMask(), E, I, Idx, isUndefVector(), llvm::PoisonMaskElem, and llvm::SmallBitVector::test().

◆ reorderOrder()

static void reorderOrder	(	SmallVectorImpl< unsigned > &	Order,
		ArrayRef< int >	Mask
	)

static

Reorders the given Order according to the given Mask.

Order - is the original order of the scalars. Procedure transforms the provided order in accordance with the given Mask. If the resulting Order is just an identity order, Order is cleared.

Definition at line 3736 of file SLPVectorizer.cpp.

References assert(), llvm::SmallVectorImpl< T >::assign(), llvm::SmallVectorTemplateCommon< T, typename >::begin(), llvm::SmallVectorImpl< T >::clear(), E, llvm::SmallVectorBase< Size_T >::empty(), llvm::SmallVectorTemplateCommon< T, typename >::end(), fixupOrderingIndices(), I, llvm::inversePermutation(), llvm::ShuffleVectorInst::isIdentityMask(), llvm::PoisonMaskElem, reorderReuses(), and llvm::SmallVectorImpl< T >::resize().

Referenced by llvm::slpvectorizer::BoUpSLP::getReorderingData(), llvm::slpvectorizer::BoUpSLP::reorderBottomToTop(), and llvm::slpvectorizer::BoUpSLP::reorderTopToBottom().

◆ reorderReuses()

static void reorderReuses	(	SmallVectorImpl< int > &	Reuses,
		ArrayRef< int >	Mask
	)

static

Reorders the given Reuses mask according to the given Mask.

Reuses contains original mask for the scalars reused in the node. Procedure transform this mask in accordance with the given Mask.

Definition at line 3722 of file SLPVectorizer.cpp.

References assert(), llvm::SmallVectorTemplateCommon< T, typename >::begin(), E, llvm::SmallVectorTemplateCommon< T, typename >::end(), I, llvm::PoisonMaskElem, llvm::SmallVectorBase< Size_T >::size(), and llvm::SmallVectorImpl< T >::swap().

Referenced by llvm::slpvectorizer::BoUpSLP::reorderBottomToTop(), and reorderOrder().

◆ STATISTIC()

STATISTIC	(	NumVectorInstructions	,
		"Number of vector instructions generated"
	)

◆ tryGetSecondaryReductionRoot()

static Instruction * tryGetSecondaryReductionRoot	(	PHINode *	Phi,
		Instruction *	Root
	)

static

We could have an initial reduction that is not an add.

r *= v1 + v2 + v3 + v4 In such a case start looking for a tree rooted in the first '+'. \Returns the new root if found, which may be nullptr if not an instruction.

Definition at line 14132 of file SLPVectorizer.cpp.

References assert(), llvm::User::getOperand(), LHS, and RHS.

◆ tryToGatherExtractElements()

static std::optional< TTI::ShuffleKind > tryToGatherExtractElements	(	SmallVectorImpl< Value * > &	VL,
		SmallVectorImpl< int > &	Mask
	)

static

Tries to find extractelement instructions with constant indices from fixed vector type and gather such instructions into a bunch, which highly likely might be detected as a shuffle of 1 or 2 input vectors.

If this attempt was successful, the matched scalars are replaced by poison values in VL for future analysis.

Definition at line 548 of file SLPVectorizer.cpp.

References llvm::SmallBitVector::all(), llvm::SmallVectorTemplateCommon< T, typename >::begin(), llvm::Data, E, llvm::SmallVectorTemplateCommon< T, typename >::end(), llvm::SmallVectorTemplateCommon< T, typename >::front(), llvm::PoisonValue::get(), getExtractIndex(), I, Idx, llvm::is_contained(), isFixedVectorShuffle(), isUndefVector(), llvm::PoisonMaskElem, llvm::SmallVectorTemplateBase< T, bool >::push_back(), llvm::SmallBitVector::reset(), llvm::MapVector< KeyT, ValueT, MapType, VectorType >::size(), llvm::SmallVectorBase< Size_T >::size(), llvm::size(), llvm::stable_sort(), std::swap(), and llvm::SmallVectorImpl< T >::swap().

◆ tryToVectorizeSequence()

template<typename T >

static bool tryToVectorizeSequence	(	SmallVectorImpl< T * > &	Incoming,
		function_ref< bool(T , T )>	Comparator,
		function_ref< bool(T , T )>	AreCompatible,
		function_ref< bool(ArrayRef< T * >, bool)>	TryToVectorizeHelper,
		bool	MaxVFOnly,
		BoUpSLP &	R
	)

static

\Returns the minimum number of elements that we will attempt to vectorize.

Definition at line 14315 of file SLPVectorizer.cpp.

References llvm::SmallVectorImpl< T >::append(), llvm::SmallVectorTemplateCommon< T, typename >::begin(), llvm::SmallVectorImpl< T >::clear(), llvm::dbgs(), E, llvm::SmallVectorBase< Size_T >::empty(), llvm::SmallVectorTemplateCommon< T, typename >::end(), End, llvm::SmallVectorTemplateCommon< T, typename >::front(), LLVM_DEBUG, llvm::SmallVectorBase< Size_T >::size(), and llvm::stable_sort().

Variable Documentation

◆ AliasedCheckLimit

const unsigned AliasedCheckLimit = 10

static

Definition at line 188 of file SLPVectorizer.cpp.

◆ AllowHorRdxIdenityOptimization

cl::opt< bool > AllowHorRdxIdenityOptimization("slp-optimize-identity-hor-reduction-ops", cl::init(true), cl::Hidden, cl::desc("Allow optimization of original scalar identity operations on " "matched horizontal reductions."))	(	"slp-optimize-identity-hor-reduction-ops"	,
		cl::init(true)	,
		cl::Hidden	,
		cl::desc("Allow optimization of original scalar identity operations on " "matched horizontal reductions.")
	)

static

◆ LookAheadMaxDepth

cl::opt< int > LookAheadMaxDepth("slp-max-look-ahead-depth", cl::init(2), cl::Hidden, cl::desc("The maximum look-ahead depth for operand reordering scores"))	(	"slp-max-look-ahead-depth"	,
		cl::init(2)	,
		cl::Hidden	,
		cl::desc("The maximum look-ahead depth for operand reordering scores")
	)

static

◆ MaxMemDepDistance

const unsigned MaxMemDepDistance = 160

static

Definition at line 193 of file SLPVectorizer.cpp.

◆ MaxStoreLookup

cl::opt< int > MaxStoreLookup("slp-max-store-lookup", cl::init(32), cl::Hidden, cl::desc("Maximum depth of the lookup for consecutive stores."))	(	"slp-max-store-lookup"	,
		cl::init(32)	,
		cl::Hidden	,
		cl::desc("Maximum depth of the lookup for consecutive stores.")
	)

static

◆ MaxVectorRegSizeOption

cl::opt< int > MaxVectorRegSizeOption("slp-max-reg-size", cl::init(128), cl::Hidden, cl::desc("Attempt to vectorize for this register size in bits"))	(	"slp-max-reg-size"	,
		cl::init(128)	,
		cl::Hidden	,
		cl::desc("Attempt to vectorize for this register size in bits")
	)

static

Referenced by llvm::slpvectorizer::BoUpSLP::BoUpSLP().

◆ MaxVFOption

cl::opt< unsigned > MaxVFOption("slp-max-vf", cl::init(0), cl::Hidden, cl::desc("Maximum SLP vectorization factor (0=unlimited)"))	(	"slp-max-vf"	,
		cl::init(0)	,
		cl::Hidden	,
		cl::desc("Maximum SLP vectorization factor (0=unlimited)")
	)

static

Referenced by llvm::slpvectorizer::BoUpSLP::getMaximumVF().

◆ MinScheduleRegionSize

const int MinScheduleRegionSize = 16

static

If the ScheduleRegionSizeBudget is exhausted, we allow small scheduling regions to be handled.

Definition at line 197 of file SLPVectorizer.cpp.

◆ MinTreeSize

cl::opt< unsigned > MinTreeSize("slp-min-tree-size", cl::init(3), cl::Hidden, cl::desc("Only vectorize small trees if they are fully vectorizable"))	(	"slp-min-tree-size"	,
		cl::init(3)	,
		cl::Hidden	,
		cl::desc("Only vectorize small trees if they are fully vectorizable")
	)

static

Referenced by llvm::slpvectorizer::BoUpSLP::isTreeTinyAndNotFullyVectorizable().

◆ MinVectorRegSizeOption

cl::opt< int > MinVectorRegSizeOption("slp-min-reg-size", cl::init(128), cl::Hidden, cl::desc("Attempt to vectorize for this register size in bits"))	(	"slp-min-reg-size"	,
		cl::init(128)	,
		cl::Hidden	,
		cl::desc("Attempt to vectorize for this register size in bits")
	)

static

Referenced by llvm::slpvectorizer::BoUpSLP::BoUpSLP().

◆ RecursionMaxDepth

cl::opt< unsigned > RecursionMaxDepth("slp-recursion-max-depth", cl::init(12), cl::Hidden, cl::desc("Limit the recursion depth when building a vectorizable tree"))	(	"slp-recursion-max-depth"	,
		cl::init(12)	,
		cl::Hidden	,
		cl::desc("Limit the recursion depth when building a vectorizable tree")
	)

static

Referenced by llvm::slpvectorizer::BoUpSLP::reorderTopToBottom().

◆ RootLookAheadMaxDepth

cl::opt< int > RootLookAheadMaxDepth("slp-max-root-look-ahead-depth", cl::init(2), cl::Hidden, cl::desc("The maximum look-ahead depth for searching best rooting option"))	(	"slp-max-root-look-ahead-depth"	,
		cl::init(2)	,
		cl::Hidden	,
		cl::desc("The maximum look-ahead depth for searching best rooting option")
	)

static

Referenced by llvm::slpvectorizer::BoUpSLP::findBestRootPair().

◆ RunSLPVectorization

cl::opt< bool > RunSLPVectorization("vectorize-slp", cl::init(true), cl::Hidden, cl::desc("Run the SLP vectorization passes"))	(	"vectorize-slp"	,
		cl::init(true)	,
		cl::Hidden	,
		cl::desc("Run the SLP vectorization passes")
	)

Referenced by llvm::SLPVectorizerPass::runImpl().

◆ ScheduleRegionSizeBudget

cl::opt< int > ScheduleRegionSizeBudget("slp-schedule-budget", cl::init(100000), cl::Hidden, cl::desc("Limit the size of the SLP scheduling region per block"))	(	"slp-schedule-budget"	,
		cl::init(100000)	,
		cl::Hidden	,
		cl::desc("Limit the size of the SLP scheduling region per block")
	)

static

Limits the size of scheduling regions in a block.

It avoid long compile times for very large blocks where vector instructions are spread over a wide range. This limit is way higher than needed by real-world functions.

◆ ShouldStartVectorizeHorAtStore

cl::opt< bool > ShouldStartVectorizeHorAtStore("slp-vectorize-hor-store", cl::init(false), cl::Hidden, cl::desc( "Attempt to vectorize horizontal reductions feeding into a store"))	(	"slp-vectorize-hor-store"	,
		cl::init(false)	,
		cl::Hidden	,
		cl::desc( "Attempt to vectorize horizontal reductions feeding into a store")
	)

static

◆ ShouldVectorizeHor

cl::opt< bool > ShouldVectorizeHor("slp-vectorize-hor", cl::init(true), cl::Hidden, cl::desc("Attempt to vectorize horizontal reductions"))	(	"slp-vectorize-hor"	,
		cl::init(true)	,
		cl::Hidden	,
		cl::desc("Attempt to vectorize horizontal reductions")
	)

static

◆ SLPCostThreshold

cl::opt< int > SLPCostThreshold("slp-threshold", cl::init(0), cl::Hidden, cl::desc("Only vectorize if you gain more than this " "number "))	(	"slp-threshold"	,
		cl::init(0)	,
		cl::Hidden	,
		cl::desc("Only vectorize if you gain more than this " "number ")
	)

static

◆ ViewSLPTree

cl::opt< bool > ViewSLPTree("view-slp-tree", cl::Hidden, cl::desc("Display the SLP trees with Graphviz"))	(	"view-slp-tree"	,
		cl::Hidden	,
		cl::desc("Display the SLP trees with Graphviz")
	)

static

Referenced by llvm::slpvectorizer::BoUpSLP::getTreeCost().

Classes

Namespaces

Macros

Functions

Variables

Macro Definition Documentation

◆ DEBUG_TYPE

◆ SV_NAME

Function Documentation

◆ addMask()

◆ allConstant()

◆ allSameBlock()

◆ allSameType()

◆ areCompatibleCmpOps()

◆ arePointersCompatible()

◆ areTwoInsertFromSameBuildVector()

◆ buildShuffleEntryMask()

◆ buildUseMask()

◆ canVectorizeLoads()

◆ clusterSortPtrAccesses()

◆ collectValuesToDemote()

◆ compareCmp()

◆ dumpOrder()

◆ findBuildAggregate()

◆ findBuildAggregate_rec()

◆ fixupOrderingIndices()

◆ generateKeySubkey()

◆ getAggregateSize()

◆ getExtractIndex()

◆ getInsertIndex()

◆ getLocation()

◆ getNonPhiOperand()

◆ getReductionInstr()

◆ getSameOpcode()

◆ getVectorCallCosts()

◆ InTreeUserNeedToExtract()

◆ isAlternateInstruction()

◆ isCmpSameOrSwapped()

◆ isCommutative()

◆ isConstant()

◆ isFirstInsertElement()

◆ isFixedVectorShuffle()

◆ isLoadCombineCandidateImpl()

◆ isOneOf()

◆ isReductionCandidate()

◆ isRepeatedNonIdentityClusteredMask()

◆ isSimple()

◆ isSplat()

◆ isUndefVector()

◆ isValidElementType()

◆ isValidForAlternation()

◆ isVectorLikeInstWithConstOps()

◆ matchRdxBop()

◆ needToScheduleSingleInstruction()

◆ performExtractsShuffleAction()

◆ reorderOrder()

◆ reorderReuses()

◆ STATISTIC()

◆ tryGetSecondaryReductionRoot()

◆ tryToGatherExtractElements()

◆ tryToVectorizeSequence()

Variable Documentation

◆ AliasedCheckLimit

◆ AllowHorRdxIdenityOptimization

◆ LookAheadMaxDepth

◆ MaxMemDepDistance

◆ MaxStoreLookup

◆ MaxVectorRegSizeOption

◆ MaxVFOption

◆ MinScheduleRegionSize

◆ MinTreeSize

◆ MinVectorRegSizeOption

◆ RecursionMaxDepth

◆ RootLookAheadMaxDepth

◆ RunSLPVectorization

◆ ScheduleRegionSizeBudget

◆ ShouldStartVectorizeHorAtStore

◆ ShouldVectorizeHor

◆ SLPCostThreshold

◆ ViewSLPTree