Merges shuffle masks and emits final shuffle instruction, if required. More...

Inheritance diagram for llvm::slpvectorizer::BoUpSLP::ShuffleInstructionBuilder:

Public Member Functions
	ShuffleInstructionBuilder (Type *ScalarTy, IRBuilderBase &Builder, BoUpSLP &R)
Value *	adjustExtracts (const TreeEntry *E, MutableArrayRef< int > Mask, ArrayRef< std::optional< TTI::ShuffleKind > > ShuffleKinds, unsigned NumParts, bool &UseVecBaseAsInput)
	Adjusts extractelements after reusing them.
std::optional< Value * >	needToDelay (const TreeEntry E, ArrayRef< SmallVector< const TreeEntry > > Deps) const
	Checks if the specified entry `E` needs to be delayed because of its dependency nodes.
void	resetForSameNode ()
	Reset the builder to handle perfect diamond match.
void	add (const TreeEntry &E1, const TreeEntry &E2, ArrayRef< int > Mask)
	Adds 2 input vectors (in form of tree entries) and the mask for their shuffling.
void	add (const TreeEntry &E1, ArrayRef< int > Mask)
	Adds single input vector (in form of tree entry) and the mask for its shuffling.
void	add (Value V1, Value V2, ArrayRef< int > Mask)
	Adds 2 input vectors and the mask for their shuffling.
void	add (Value *V1, ArrayRef< int > Mask, bool=false)
	Adds another one input vector and the mask for the shuffling.
void	addOrdered (Value *V1, ArrayRef< unsigned > Order)
	Adds another one input vector and the mask for the shuffling.
Value *	gather (ArrayRef< Value * > VL, unsigned MaskVF=0, Value *Root=nullptr)
Value *	createFreeze (Value *V)
Value *	finalize (ArrayRef< int > ExtMask, ArrayRef< std::pair< const TreeEntry , unsigned > > SubVectors, ArrayRef< int > SubVectorsMask, unsigned VF=0, function_ref< void(Value &, SmallVectorImpl< int > &, function_ref< Value (Value , Value *, ArrayRef< int >)>)> Action={})
	Finalize emission of the shuffles.
	~ShuffleInstructionBuilder ()

Detailed Description

Merges shuffle masks and emits final shuffle instruction, if required.

It supports shuffling of 2 input vectors. It implements lazy shuffles emission, when the actual shuffle instruction is generated only if this is actually required. Otherwise, the shuffle instruction emission is delayed till the end of the process, to reduce the number of emitted instructions and further analysis/transformations. The class also will look through the previously emitted shuffle instructions and properly mark indices in mask as undef. For example, given the code

%s1 = shufflevector <2 x ty> %0, poison, <1, 0>

%s2 = shufflevector <2 x ty> %1, poison, <1, 0>

and if need to emit shuffle of s1 and s2 with mask <1, 0, 3, 2>, it will look through s1 and s2 and emit

%res = shufflevector <2 x ty> %0, %1, <0, 1, 2, 3>

instead. If 2 operands are of different size, the smallest one will be resized and the mask recalculated properly. For example, given the code

%s1 = shufflevector <2 x ty> %0, poison, <1, 0, 1, 0>

%s2 = shufflevector <2 x ty> %1, poison, <1, 0, 1, 0>

and if need to emit shuffle of s1 and s2 with mask <1, 0, 5, 4>, it will look through s1 and s2 and emit

%res = shufflevector <2 x ty> %0, %1, <0, 1, 2, 3>

instead.

Definition at line 17783 of file SLPVectorizer.cpp.

Constructor & Destructor Documentation

◆ ShuffleInstructionBuilder()

llvm::slpvectorizer::BoUpSLP::ShuffleInstructionBuilder::ShuffleInstructionBuilder	(	Type *	ScalarTy,
		IRBuilderBase &	Builder,
		BoUpSLP &	R )

inline

Definition at line 17920 of file SLPVectorizer.cpp.

References llvm::slpvectorizer::BoUpSLP::BoUpSLP().

◆ ~ShuffleInstructionBuilder()

llvm::slpvectorizer::BoUpSLP::ShuffleInstructionBuilder::~ShuffleInstructionBuilder ( )

inline

Definition at line 18304 of file SLPVectorizer.cpp.

References assert().

Member Function Documentation

◆ add() [1/4]

void llvm::slpvectorizer::BoUpSLP::ShuffleInstructionBuilder::add	(	const TreeEntry &	E1,
		ArrayRef< int >	Mask )

inline

Adds single input vector (in form of tree entry) and the mask for its shuffling.

Definition at line 18091 of file SLPVectorizer.cpp.

References add().

◆ add() [2/4]

void llvm::slpvectorizer::BoUpSLP::ShuffleInstructionBuilder::add	(	const TreeEntry &	E1,
		const TreeEntry &	E2,
		ArrayRef< int >	Mask )

inline

Adds 2 input vectors (in form of tree entries) and the mask for their shuffling.

Definition at line 18084 of file SLPVectorizer.cpp.

References add().

Referenced by add(), add(), and addOrdered().

◆ add() [3/4]

void llvm::slpvectorizer::BoUpSLP::ShuffleInstructionBuilder::add	(	Value *	V1,
		ArrayRef< int >	Mask,
		bool	= false )

inline

Adds another one input vector and the mask for the shuffling.

Definition at line 18130 of file SLPVectorizer.cpp.

References assert(), llvm::cast(), llvm::find(), llvm::Value::getType(), llvm::isa(), and llvm::PoisonMaskElem.

◆ add() [4/4]

void llvm::slpvectorizer::BoUpSLP::ShuffleInstructionBuilder::add	(	Value *	V1,
		Value *	V2,
		ArrayRef< int >	Mask )

inline

Adds 2 input vectors and the mask for their shuffling.

Definition at line 18096 of file SLPVectorizer.cpp.

References assert(), llvm::cast(), llvm::Value::getType(), llvm::isa(), and llvm::PoisonMaskElem.

◆ addOrdered()

void llvm::slpvectorizer::BoUpSLP::ShuffleInstructionBuilder::addOrdered	(	Value *	V1,
		ArrayRef< unsigned >	Order )

inline

Adds another one input vector and the mask for the shuffling.

Definition at line 18183 of file SLPVectorizer.cpp.

References add(), and llvm::inversePermutation().

◆ adjustExtracts()

Value * llvm::slpvectorizer::BoUpSLP::ShuffleInstructionBuilder::adjustExtracts	(	const TreeEntry *	E,
		MutableArrayRef< int >	Mask,
		ArrayRef< std::optional< TTI::ShuffleKind > >	ShuffleKinds,
		unsigned	NumParts,
		bool &	UseVecBaseAsInput )

inline

Adjusts extractelements after reusing them.

Definition at line 17924 of file SLPVectorizer.cpp.

References llvm::any_of(), assert(), llvm::cast(), llvm::count(), llvm::ArrayRef< T >::empty(), I, llvm::SmallPtrSetImpl< PtrType >::insert(), llvm::PoisonMaskElem, and llvm::reorderScalars().

◆ createFreeze()

Value * llvm::slpvectorizer::BoUpSLP::ShuffleInstructionBuilder::createFreeze ( Value * V )

inline

Definition at line 18195 of file SLPVectorizer.cpp.

◆ finalize()

Value * llvm::slpvectorizer::BoUpSLP::ShuffleInstructionBuilder::finalize	(	ArrayRef< int >	ExtMask,
		ArrayRef< std::pair< const TreeEntry *, unsigned > >	SubVectors,
		ArrayRef< int >	SubVectorsMask,
		unsigned	VF = 0,
		function_ref< void(Value &, SmallVectorImpl< int > &, function_ref< Value (Value , Value , ArrayRef< int >)>)>	Action = {} )

inline

Finalize emission of the shuffles.

Parameters

Action the action (if any) to be performed before final applying of the ExtMask mask.

Definition at line 18199 of file SLPVectorizer.cpp.

◆ gather()

Value * llvm::slpvectorizer::BoUpSLP::ShuffleInstructionBuilder::gather	(	ArrayRef< Value * >	VL,
		unsigned	MaskVF = 0,
		Value *	Root = nullptr )

inline

Definition at line 18188 of file SLPVectorizer.cpp.

◆ needToDelay()

std::optional< Value * > llvm::slpvectorizer::BoUpSLP::ShuffleInstructionBuilder::needToDelay	(	const TreeEntry *	E,
		ArrayRef< SmallVector< const TreeEntry * > >	Deps ) const

inline

Checks if the specified entry E needs to be delayed because of its dependency nodes.

Definition at line 18060 of file SLPVectorizer.cpp.

References llvm::all_of(), llvm::PoisonValue::get(), llvm::PointerType::getUnqual(), and getWidenedType().

◆ resetForSameNode()

void llvm::slpvectorizer::BoUpSLP::ShuffleInstructionBuilder::resetForSameNode ( )

inline

Reset the builder to handle perfect diamond match.

Definition at line 18077 of file SLPVectorizer.cpp.

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

lib/Transforms/Vectorize/SLPVectorizer.cpp

Public Member Functions

Detailed Description

Constructor & Destructor Documentation

◆ ShuffleInstructionBuilder()

◆ ~ShuffleInstructionBuilder()

Member Function Documentation

◆ add() [1/4]

◆ add() [2/4]

◆ add() [3/4]

◆ add() [4/4]

◆ addOrdered()

◆ adjustExtracts()

◆ createFreeze()

◆ finalize()

◆ gather()

◆ needToDelay()

◆ resetForSameNode()