llvm::slpvectorizer::BoUpSLP::ShuffleInstructionBuilder Class Reference

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	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, unsigned VF=0, function_ref< void(Value *&, SmallVectorImpl< 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 11965 of file SLPVectorizer.cpp.

Constructor & Destructor Documentation

ShuffleInstructionBuilder()

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

inline

Definition at line 12100 of file SLPVectorizer.cpp.

~ShuffleInstructionBuilder()

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

inline

Definition at line 12434 of file SLPVectorizer.cpp.

References assert(), and llvm::SmallVectorBase< Size_T >::empty().

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 12269 of file SLPVectorizer.cpp.

References llvm::any_of(), llvm::Value::getType(), and llvm::Type::isIntOrIntVectorTy().

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 12252 of file SLPVectorizer.cpp.

References llvm::any_of(), llvm::Value::getType(), and llvm::Type::isIntOrIntVectorTy().

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

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 12312 of file SLPVectorizer.cpp.

References assert(), llvm::SmallVectorImpl< T >::assign(), llvm::SmallVectorTemplateCommon< T, typename >::back(), llvm::SmallVectorTemplateCommon< T, typename >::begin(), llvm::SmallVectorBase< Size_T >::empty(), llvm::SmallVectorTemplateCommon< T, typename >::end(), llvm::find(), llvm::SmallVectorTemplateCommon< T, typename >::front(), llvm::Value::getType(), Idx, llvm::PoisonMaskElem, llvm::SmallVectorTemplateBase< T, bool >::push_back(), and llvm::SmallVectorBase< Size_T >::size().

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 12279 of file SLPVectorizer.cpp.

References assert(), llvm::SmallVectorImpl< T >::assign(), llvm::SmallVectorTemplateCommon< T, typename >::back(), llvm::SmallVectorBase< Size_T >::empty(), llvm::SmallVectorTemplateCommon< T, typename >::front(), llvm::Value::getType(), Idx, llvm::PoisonMaskElem, llvm::SmallVectorTemplateBase< T, bool >::push_back(), and llvm::SmallVectorBase< Size_T >::size().

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 12364 of file SLPVectorizer.cpp.

References 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 12104 of file SLPVectorizer.cpp.

References llvm::any_of(), assert(), llvm::count(), I, Idx, llvm::SmallPtrSetImpl< PtrType >::insert(), and llvm::PoisonMaskElem.

createFreeze()

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

inline

Definition at line 12373 of file SLPVectorizer.cpp.

References llvm::IRBuilderBase::CreateFreeze().

finalize()

Value * llvm::slpvectorizer::BoUpSLP::ShuffleInstructionBuilder::finalize ( ArrayRef< int >  ExtMask, unsigned  VF = 0, function_ref< void(Value *&, SmallVectorImpl< 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 12378 of file SLPVectorizer.cpp.

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

gather()

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

inline

Definition at line 12369 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 12234 of file SLPVectorizer.cpp.

References llvm::all_of(), llvm::IRBuilderBase::CreateAlignedLoad(), llvm::PoisonValue::get(), llvm::Type::getContext(), llvm::PointerType::getUnqual(), and getWidenedType().

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

• lib/Transforms/Vectorize/SLPVectorizer.cpp