#include "mlir/Dialect/Affine/Utils.h"
#include "mlir/Analysis/SliceAnalysis.h"
#include "mlir/Dialect/Affine/IR/AffineOps.h"
#include "mlir/Dialect/Arith/IR/Arith.h"
#include "mlir/Dialect/Func/IR/FuncOps.h"
#include "mlir/Dialect/Linalg/IR/Linalg.h"
#include "mlir/Dialect/Linalg/Transforms/Transforms.h"
#include "mlir/Dialect/Linalg/Utils/Utils.h"
#include "mlir/Dialect/Tensor/IR/Tensor.h"
#include "mlir/Dialect/Utils/StructuredOpsUtils.h"
#include "mlir/Dialect/Vector/IR/VectorOps.h"
#include "mlir/Dialect/Vector/Interfaces/MaskableOpInterface.h"
#include "mlir/IR/AffineExpr.h"
#include "mlir/IR/PatternMatch.h"
#include "mlir/Support/LLVM.h"
#include "mlir/Transforms/RegionUtils.h"
#include "llvm/ADT/Sequence.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/TypeSwitch.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/raw_ostream.h"
#include <optional>
#include <type_traits>

Include dependency graph for Vectorization.cpp:

Classes
struct	VectorizationState
	Contains the vectorization state and related methods used across the vectorization process of a given operation. More...

struct	VectorizationResult

struct	GenericPadOpVectorizationPattern
	Rewrite a tensor::PadOp into a sequence of EmptyOp, FillOp and InsertSliceOp. More...

struct	VectorizePadOpUserPattern< OpTy >
	Base pattern for rewriting tensor::PadOps whose result is consumed by a given operation type OpTy. More...

struct	PadOpVectorizationWithTransferReadPattern
	Rewrite use of tensor::PadOp result in TransferReadOp. More...

struct	PadOpVectorizationWithTransferWritePattern
	Rewrite use of tensor::PadOp result in TransferWriteOp. More...

struct	PadOpVectorizationWithInsertSlicePattern
	Rewrite use of tensor::PadOp result in InsertSliceOp. More...

struct	VectorizeConvolution

Macros
#define	DEBUG_TYPE "linalg-vectorization"

#define	DBGS() (llvm::dbgs() << '[' << DEBUG_TYPE << "] ")

#define	LDBG(X) LLVM_DEBUG(DBGS() << X << "\n")

Typedefs
using	CustomVectorizationPrecondition = std::function< LogicalResult(Operation *, bool)>

using	CustomVectorizationHook = std::function< VectorizationResult(Operation *, const IRMapping &)>

Enumerations
enum class	Conv1DOpOrder { W , Ncw , Nwc }
	Helper enum to represent conv1d input traversal order. More...

enum	VectorizationStatus { Failure = 0 , NoReplace , NewOp }
	Helper data structure to represent the result of vectorization. More...

enum	VectorMemoryAccessKind { Contiguous , Gather }

Functions
static FailureOr< Operation * >	vectorizeConvolution (RewriterBase &rewriter, LinalgOp convOp)
	Try to vectorize `convOp` as a convolution. More...

template<typename OpType >
static OpType	getSingleOpOfType (Block &block)
	Return the unique instance of OpType in `block` if it is indeed unique. More...

static SmallVector< Value >	extractConvInputSlices (RewriterBase &rewriter, Location loc, Value input, int64_t nSize, int64_t wSize, int64_t cSize, int64_t kwSize, int strideW, int dilationW, int64_t wSizeStep, bool isSingleChanneled)
	Helper function to extract the input slices after filter is unrolled along kw. More...

static SmallVector< Value >	extractConvFilterSlices (RewriterBase &rewriter, Location loc, Value filter, int64_t kwSize)
	Helper function to extract the filter slices after filter is unrolled along kw. More...

static SmallVector< Value >	extractConvResultSlices (RewriterBase &rewriter, Location loc, Value res, int64_t nSize, int64_t wSize, int64_t fSize, int64_t wSizeStep, bool isSingleChanneled)
	Helper function to extract the result slices after filter is unrolled along kw. More...

static Value	insertConvResultSlices (RewriterBase &rewriter, Location loc, Value res, int64_t wSize, int64_t wSizeStep, SmallVectorImpl< Value > &resVals, bool isSingleChanneled)
	Helper function to insert the computed result slices. More...

static AffineMap	reindexIndexingMap (AffineMap map)
	Given an indexing `map` coming from a LinalgOp indexing, restricted to a projectedPermutation, compress the unused dimensions to serve as a permutation_map for a vector transfer operation. More...

static Operation *	matchLinalgReduction (OpOperand *outputOperand)
	Check whether `outputOperand` is a reduction with a single combiner operation. More...

static Value	broadcastIfNeeded (OpBuilder &b, Value value, ArrayRef< int64_t > shape)
	Broadcast `value` to a vector of `shape` if possible. More...

static Operation *	buildMultiDimReduce (OpBuilder &b, Operation *reduceOp, Value valueToReduce, Value acc, ArrayRef< bool > dimsToMask)
	Create MultiDimReductionOp to compute the reduction for `reductionOp`. More...

static SmallVector< bool >	getDimsToReduce (LinalgOp linalgOp)

static Value	buildVectorWrite (RewriterBase &rewriter, Value value, OpOperand *outputOperand, VectorizationState &state)
	Build a vector.transfer_write of `value` into `outputOperand` at indices set to all `0`; where `outputOperand` is an output operand of the LinalgOp currently being vectorized. More...

static VectorizationResult	vectorizeLinalgYield (RewriterBase &rewriter, Operation *op, const IRMapping &bvm, VectorizationState &state, LinalgOp linalgOp, SmallVectorImpl< Value > &newResults)
	Helper function to vectorize the terminator of a `linalgOp`. More...

static VectorizationResult	vectorizeLinalgIndex (RewriterBase &rewriter, VectorizationState &state, Operation *op, LinalgOp linalgOp)
	Helper function to vectorize the index operations of a `linalgOp`. More...

static LogicalResult	tensorExtractVectorizationPrecondition (Operation *op, bool vectorizeNDExtract)
	Helper function to check if the tensor.extract can be vectorized by the custom hook vectorizeTensorExtract. More...

static Value	calculateGatherOffset (RewriterBase &rewriter, tensor::ExtractOp extractOp, const IRMapping &bvm, const ArrayRef< int64_t > targetShape)
	Calculates the offsets (`$index_vec`) for `vector.gather` operations generated from `tensor.extract`. More...

static bool	isLoopInvariantIdx (LinalgOp &linalgOp, Value &val)
	Checks whether /p val can be used for calculating a loop invariant index. More...

static bool	isContiguousLoadIdx (LinalgOp &linalgOp, Value &val, bool &foundIndexOp)
	Check whether `val` could be used for calculating the trailing index for a contiguous load operation. More...

static VectorMemoryAccessKind	getTensorExtractMemoryAccessPattern (tensor::ExtractOp extractOp, LinalgOp &linalgOp)
	Check whether `extractOp` would be a gather or a contiguous load Op after vectorising `linalgOp`. More...

static VectorizationResult	vectorizeTensorExtract (RewriterBase &rewriter, VectorizationState &state, Operation *op, LinalgOp linalgOp, const IRMapping &bvm)
	Helper function to vectorize the tensor.extract operations. More...

static Operation *	reduceIfNeeded (OpBuilder &b, LinalgOp linalgOp, Operation *op, Value reduceValue, Value initialValue, const IRMapping &bvm)
	Emit reduction operations if the shapes of the value to reduce is different that the result shape. More...

static VectorizationResult	vectorizeOneOp (RewriterBase &rewriter, LinalgOp linalgOp, Operation *op, const IRMapping &bvm, ArrayRef< CustomVectorizationHook > customVectorizationHooks)
	Generic vectorization for a single operation `op`, given already vectorized operands carried by `bvm`. More...

static LogicalResult	vectorizeAsLinalgGeneric (RewriterBase &rewriter, VectorizationState &state, LinalgOp linalgOp, SmallVectorImpl< Value > &newResults)
	Generic vectorization function that rewrites the body of a `linalgOp` into vector form. More...

static LogicalResult	reductionPreconditions (LinalgOp op)

static LogicalResult	vectorizeDynamicLinalgOpPrecondition (linalg::LinalgOp op)

static void	convertAffineApply (RewriterBase &rewriter, LinalgOp linalgOp)
	Converts affine.apply Ops to arithmetic operations. More...

static int64_t	getIntFromAttr (Attribute attr)
	Helper function that retrieves the value of an IntegerAttr. More...

static SmallVector< Value >	ofrToIndexValues (RewriterBase &rewriter, Location loc, ArrayRef< OpFoldResult > ofrs)
	Given an ArrayRef of OpFoldResults, return a vector of Values. More...

static bool	mayExistInterleavedUses (Operation firstOp, Operation secondOp, ValueRange values)
	Check whether there is any interleaved use of any `values` between `firstOp` and `secondOp`. More...

static memref::SubViewOp	getSubViewUseIfUnique (Value v)
	Return the unique subview use of `v` if it is indeed unique, null otherwise. More...

template<int N>
static void	bindShapeDims (ShapedType shapedType)

template<int N, typename IntTy , typename... IntTy2>
static void	bindShapeDims (ShapedType shapedType, IntTy &val, IntTy2 &...vals)

template<typename... IntTy>
static void	bindShapeDims (ShapedType shapedType, IntTy &...vals)
	Bind a pack of int& to the leading dimensions of shapedType.getShape(). More...

Macro Definition Documentation

◆ DBGS

#define DBGS ( ) (llvm::dbgs() << '[' << DEBUG_TYPE << "] ")

Definition at line 42 of file Vectorization.cpp.

◆ DEBUG_TYPE

#define DEBUG_TYPE "linalg-vectorization"

Definition at line 40 of file Vectorization.cpp.

◆ LDBG

#define LDBG ( X ) LLVM_DEBUG(DBGS() << X << "\n")

Definition at line 43 of file Vectorization.cpp.

Typedef Documentation

◆ CustomVectorizationHook

using CustomVectorizationHook = std::function<VectorizationResult(Operation *, const IRMapping &)>

Definition at line 606 of file Vectorization.cpp.

◆ CustomVectorizationPrecondition

using CustomVectorizationPrecondition = std::function<LogicalResult(Operation *, bool)>

Definition at line 600 of file Vectorization.cpp.

Enumeration Type Documentation

◆ Conv1DOpOrder

enum Conv1DOpOrder

strong

Helper enum to represent conv1d input traversal order.

Enumerator
W
Ncw
Nwc

Definition at line 442 of file Vectorization.cpp.

◆ VectorizationStatus

enum VectorizationStatus

Helper data structure to represent the result of vectorization.

In certain specific cases, like terminators, we do not want to propagate/

Enumerator
Failure	Op failed to vectorize.
NoReplace	Op vectorized and custom function took care of replacement logic.
NewOp	Op vectorized into a new Op whose results will replace original Op's results.

Definition at line 450 of file Vectorization.cpp.

◆ VectorMemoryAccessKind

enum VectorMemoryAccessKind

Enumerator
Contiguous
Gather

Definition at line 740 of file Vectorization.cpp.

Function Documentation

◆ bindShapeDims() [1/3]

template<int N>

static void bindShapeDims ( ShapedType shapedType )

static

Definition at line 2128 of file Vectorization.cpp.

Referenced by bindShapeDims().

◆ bindShapeDims() [2/3]

template<typename... IntTy>

static void bindShapeDims	(	ShapedType	shapedType,
		IntTy &...	vals
	)

static

Bind a pack of int& to the leading dimensions of shapedType.getShape().

Definition at line 2138 of file Vectorization.cpp.

◆ bindShapeDims() [3/3]

template<int N, typename IntTy , typename... IntTy2>

static void bindShapeDims	(	ShapedType	shapedType,
		IntTy &	val,
		IntTy2 &...	vals
	)

static

Definition at line 2131 of file Vectorization.cpp.

References bindShapeDims().

◆ broadcastIfNeeded()

static Value broadcastIfNeeded	(	OpBuilder &	b,
		Value	value,
		ArrayRef< int64_t >	shape
	)

static

Broadcast value to a vector of shape if possible.

Return value otherwise.

Definition at line 515 of file Vectorization.cpp.

References mlir::OpBuilder::createOrFold(), mlir::getElementTypeOrSelf(), mlir::OpBuilder::getInsertionPoint(), mlir::Value::getType(), mlir::vector::isBroadcastableTo(), and mlir::vector::Success.

Referenced by buildVectorWrite(), and calculateGatherOffset().

◆ buildMultiDimReduce()

static Operation* buildMultiDimReduce	(	OpBuilder &	b,
		Operation *	reduceOp,
		Value	valueToReduce,
		Value	acc,
		ArrayRef< bool >	dimsToMask
	)

static

Create MultiDimReductionOp to compute the reduction for reductionOp.

This assumes that reductionOp has two operands and one of them is the reduction initial value.buildMultiDimReduce

Definition at line 534 of file Vectorization.cpp.

References mlir::OpBuilder::create(), mlir::linalg::getCombinerOpKind(), and mlir::Operation::getLoc().

Referenced by reduceIfNeeded().

◆ buildVectorWrite()

static Value buildVectorWrite	(	RewriterBase &	rewriter,
		Value	value,
		OpOperand *	outputOperand,
		VectorizationState &	state
	)

static

Build a vector.transfer_write of value into outputOperand at indices set to all 0; where outputOperand is an output operand of the LinalgOp currently being vectorized.

If dest has null rank, build an memref.store. Return the produced value or null if no value is produced.

Definition at line 554 of file Vectorization.cpp.

References broadcastIfNeeded(), mlir::AffineMap::compose(), mlir::OpBuilder::create(), mlir::IROperand< DerivedT, IRValueT >::get(), mlir::Builder::getBoolArrayAttr(), VectorizationState::getCanonicalVecShape(), mlir::getElementTypeOrSelf(), mlir::Value::getLoc(), mlir::detail::IROperandBase::getOwner(), mlir::Operation::getResult(), mlir::Operation::getResults(), mlir::Value::getType(), mlir::inversePermutation(), mlir::Type::isa(), LDBG, VectorizationState::maskOperation(), and reindexIndexingMap().

Referenced by vectorizeLinalgYield().

◆ calculateGatherOffset()

static Value calculateGatherOffset	(	RewriterBase &	rewriter,
		tensor::ExtractOp	extractOp,
		const IRMapping &	bvm,
		const ArrayRef< int64_t >	targetShape
	)

static

Calculates the offsets ($index_vec) for vector.gather operations generated from tensor.extract.

The offset is calculated as follows (example using scalar values):

offset = extractOp.indices[0] for (i = 1; i < numIndices; i++) offset = extractOp.dimSize[i] * offset + extractOp.indices[i];

For tensor<45 x 80 x 15 x f32> and index [1, 2, 3], this leads to: offset = ( ( 1 ) * 80 + 2 ) * 15 + 3

Definition at line 708 of file Vectorization.cpp.

References broadcastIfNeeded(), mlir::OpBuilder::create(), mlir::Builder::getIndexType(), and mlir::IRMapping::lookup().

Referenced by vectorizeTensorExtract().

◆ convertAffineApply()

static void convertAffineApply	(	RewriterBase &	rewriter,
		LinalgOp	linalgOp
	)

static

Converts affine.apply Ops to arithmetic operations.

Definition at line 1393 of file Vectorization.cpp.

References mlir::expandAffineExpr(), mlir::RewriterBase::replaceOp(), and mlir::OpBuilder::setInsertionPoint().

Referenced by mlir::linalg::vectorize().

◆ extractConvFilterSlices()

static SmallVector<Value> extractConvFilterSlices	(	RewriterBase &	rewriter,
		Location	loc,
		Value	filter,
		int64_t	kwSize
	)

static

Helper function to extract the filter slices after filter is unrolled along kw.

Definition at line 103 of file Vectorization.cpp.

References mlir::OpBuilder::create().

◆ extractConvInputSlices()

static SmallVector<Value> extractConvInputSlices	(	RewriterBase &	rewriter,
		Location	loc,
		Value	input,
		int64_t	nSize,
		int64_t	wSize,
		int64_t	cSize,
		int64_t	kwSize,
		int	strideW,
		int	dilationW,
		int64_t	wSizeStep,
		bool	isSingleChanneled
	)

static

Helper function to extract the input slices after filter is unrolled along kw.

Definition at line 68 of file Vectorization.cpp.

References mlir::OpBuilder::create().

◆ extractConvResultSlices()

static SmallVector<Value> extractConvResultSlices	(	RewriterBase &	rewriter,
		Location	loc,
		Value	res,
		int64_t	nSize,
		int64_t	wSize,
		int64_t	fSize,
		int64_t	wSizeStep,
		bool	isSingleChanneled
	)

static

Helper function to extract the result slices after filter is unrolled along kw.

Definition at line 119 of file Vectorization.cpp.

References mlir::OpBuilder::create().

◆ getDimsToReduce()

static SmallVector<bool> getDimsToReduce ( LinalgOp linalgOp )

static

Definition at line 543 of file Vectorization.cpp.

References mlir::linalg::isReductionIterator().

Referenced by reduceIfNeeded().

◆ getIntFromAttr()

static int64_t getIntFromAttr ( Attribute attr )

static

Helper function that retrieves the value of an IntegerAttr.

Definition at line 1506 of file Vectorization.cpp.

References mlir::Attribute::cast().

Referenced by ofrToIndexValues().

◆ getSingleOpOfType()

template<typename OpType >

static OpType getSingleOpOfType ( Block & block )

static

Return the unique instance of OpType in block if it is indeed unique.

Return null if none or more than 1 instances exist.

Definition at line 52 of file Vectorization.cpp.

References mlir::WalkResult::advance(), mlir::WalkResult::interrupt(), and mlir::Block::walk().

◆ getSubViewUseIfUnique()

static memref::SubViewOp getSubViewUseIfUnique ( Value v )

static

Return the unique subview use of v if it is indeed unique, null otherwise.

Definition at line 1978 of file Vectorization.cpp.

References mlir::Value::getUses().

Referenced by mlir::linalg::LinalgCopyVTRForwardingPattern::matchAndRewrite(), and mlir::linalg::LinalgCopyVTWForwardingPattern::matchAndRewrite().

◆ getTensorExtractMemoryAccessPattern()

static VectorMemoryAccessKind getTensorExtractMemoryAccessPattern	(	tensor::ExtractOp	extractOp,
		LinalgOp &	linalgOp
	)

static

Check whether extractOp would be a gather or a contiguous load Op after vectorising linalgOp.

Note that it is always safe to use gather load operations for contiguous loads (albeit slow), but not vice-versa. When in doubt, bail out and assume that extractOp is a gather load.

Definition at line 861 of file Vectorization.cpp.

References Contiguous, mlir::detail::enumerate(), Gather, isContiguousLoadIdx(), isLoopInvariantIdx(), and LDBG.

Referenced by vectorizeTensorExtract().

◆ insertConvResultSlices()

static Value insertConvResultSlices	(	RewriterBase &	rewriter,
		Location	loc,
		Value	res,
		int64_t	wSize,
		int64_t	wSizeStep,
		SmallVectorImpl< Value > &	resVals,
		bool	isSingleChanneled
	)

static

Helper function to insert the computed result slices.

Definition at line 145 of file Vectorization.cpp.

References mlir::OpBuilder::create().

◆ isContiguousLoadIdx()

static bool isContiguousLoadIdx	(	LinalgOp &	linalgOp,
		Value &	val,
		bool &	foundIndexOp
	)

static

Check whether val could be used for calculating the trailing index for a contiguous load operation.

There are currently 3 types of values that are allowed here:

loop-invariant values,
values that increment by 1 with every loop iteration,
results of basic arithmetic operations (linear and continuous) involving 1., 2. and 3. This method returns True if indeed only such values are used in calculating val.

Additionally, the trailing index for a contiguous load operation should increment by 1 with every loop iteration, i.e. be based on:

linalg.index <dim> , where <dim> is the trailing dim of the iteration space. foundIndexOp is updated to true when such an op is found.

Definition at line 808 of file Vectorization.cpp.

References mlir::Value::getDefiningOp().

Referenced by getTensorExtractMemoryAccessPattern().

◆ isLoopInvariantIdx()

static bool isLoopInvariantIdx	(	LinalgOp &	linalgOp,
		Value &	val
	)

static

Checks whether /p val can be used for calculating a loop invariant index.

Definition at line 747 of file Vectorization.cpp.

References mlir::Value::getDefiningOp().

Referenced by getTensorExtractMemoryAccessPattern().

◆ matchLinalgReduction()

static Operation* matchLinalgReduction ( OpOperand * outputOperand )

static

Check whether outputOperand is a reduction with a single combiner operation.

Return the combiner operation of the reduction. Return nullptr otherwise. Multiple reduction operations would impose an ordering between reduction dimensions and is currently unsupported in Linalg. This limitation is motivated by the fact that e.g. min(max(X)) != max(min(X))

Definition at line 499 of file Vectorization.cpp.

References mlir::OpOperand::getOperandNumber(), mlir::detail::IROperandBase::getOwner(), and mlir::matchReduction().

Referenced by reductionPreconditions().

◆ mayExistInterleavedUses()

static bool mayExistInterleavedUses	(	Operation *	firstOp,
		Operation *	secondOp,
		ValueRange	values
	)

static

Check whether there is any interleaved use of any values between firstOp and secondOp.

Conservatively return true if any op or value is in a different block.

Definition at line 1951 of file Vectorization.cpp.

References mlir::Operation::getBlock(), mlir::Operation::isBeforeInBlock(), and LDBG.

Referenced by mlir::linalg::LinalgCopyVTRForwardingPattern::matchAndRewrite(), and mlir::linalg::LinalgCopyVTWForwardingPattern::matchAndRewrite().

◆ ofrToIndexValues()

static SmallVector<Value> ofrToIndexValues	(	RewriterBase &	rewriter,
		Location	loc,
		ArrayRef< OpFoldResult >	ofrs
	)

static

Given an ArrayRef of OpFoldResults, return a vector of Values.

IntegerAttrs are converted to ConstantIndexOps. Other attribute types are not supported.

Definition at line 1513 of file Vectorization.cpp.

References mlir::OpBuilder::create(), and getIntFromAttr().

Referenced by PadOpVectorizationWithInsertSlicePattern::rewriteUser(), and GenericPadOpVectorizationPattern::tryVectorizeCopy().

◆ reduceIfNeeded()

static Operation* reduceIfNeeded	(	OpBuilder &	b,
		LinalgOp	linalgOp,
		Operation *	op,
		Value	reduceValue,
		Value	initialValue,
		const IRMapping &	bvm
	)

static

Emit reduction operations if the shapes of the value to reduce is different that the result shape.

Definition at line 1010 of file Vectorization.cpp.

References buildMultiDimReduce(), mlir::Type::dyn_cast(), getDimsToReduce(), mlir::Value::getType(), and mlir::IRMapping::lookup().

Referenced by vectorizeOneOp().

◆ reductionPreconditions()

static LogicalResult reductionPreconditions ( LinalgOp op )

static

Definition at line 1273 of file Vectorization.cpp.

References mlir::failure(), mlir::linalg::getCombinerOpKind(), mlir::AffineMap::isPermutation(), mlir::linalg::isReductionIterator(), LDBG, matchLinalgReduction(), and mlir::success().

Referenced by mlir::linalg::vectorizeLinalgOpPrecondition().

◆ reindexIndexingMap()

static AffineMap reindexIndexingMap ( AffineMap map )

static

Given an indexing map coming from a LinalgOp indexing, restricted to a projectedPermutation, compress the unused dimensions to serve as a permutation_map for a vector transfer operation.

For example, given a linalg op such as:

%0 = linalg.generic {
     indexing_maps = affine_map<(d0, d1, d2, d3, d4) -> (d4, d0, d2)>,
     indexing_maps = affine_map<(d0, d1, d2, d3, d4) -> (d1, d3)>
   }
  ins(%0 : tensor<2x3x4xf32>)
 outs(%1 : tensor<5x6xf32>)

the iteration domain size of the linalg op is 3x5x4x6x2. The first affine map is reindexed to affine_map<(d0, d1, d2) -> (d2, d0, d1)>, the second affine map is reindexed to affine_map<(d0, d1) -> (d0, d1)>.

Definition at line 432 of file Vectorization.cpp.

References mlir::compressUnusedDims(), and mlir::AffineMap::isProjectedPermutation().

Referenced by buildVectorWrite(), and vectorizeAsLinalgGeneric().

◆ tensorExtractVectorizationPrecondition()

static LogicalResult tensorExtractVectorizationPrecondition	(	Operation *	op,
		bool	vectorizeNDExtract
	)

static

Helper function to check if the tensor.extract can be vectorized by the custom hook vectorizeTensorExtract.

Definition at line 678 of file Vectorization.cpp.

References mlir::failure(), and mlir::success().

Referenced by mlir::linalg::vectorizeLinalgOpPrecondition().

◆ vectorizeAsLinalgGeneric()

static LogicalResult vectorizeAsLinalgGeneric	(	RewriterBase &	rewriter,
		VectorizationState &	state,
		LinalgOp	linalgOp,
		SmallVectorImpl< Value > &	newResults
	)

static

Generic vectorization function that rewrites the body of a linalgOp into vector form.

Generic vectorization proceeds as follows:

Verify the linalgOp has one non-empty region.
Values defined above the region are mapped to themselves and will be broadcasted on a per-need basis by their consumers.
Each region argument is vectorized into a vector.transfer_read (or 0-d load). TODO: Reuse opportunities for RAR dependencies. 4a. Register CustomVectorizationHook for YieldOp to capture the results. 4rewriter. Register CustomVectorizationHook for IndexOp to access the iteration indices.
Iteratively call vectorizeOneOp on the region operations.

When broadcastToMaximalCommonShape is set to true, eager broadcasting is performed to the maximal common vector size implied by the linalgOp iteration space. This eager broadcasting is introduced in the permutation_map of the vector.transfer_read operations. The eager broadcasting makes it trivial to detrmine where broadcast, transposes and reductions should occur, without any bookkeeping. The tradeoff is that, in the absence of good canonicalizations, the amount of work increases. This is not deemed a problem as we expect canonicalizations and foldings to aggressively clean up the useless work.

Definition at line 1147 of file Vectorization.cpp.

References mlir::AffineMap::compose(), mlir::OpBuilder::create(), mlir::AffineMap::dropResults(), mlir::detail::enumerate(), mlir::failure(), Failure, mlir::BlockArgument::getArgNumber(), mlir::Builder::getBoolArrayAttr(), VectorizationState::getCanonicalVecShape(), mlir::getElementTypeOrSelf(), mlir::Block::getOperations(), mlir::Operation::getResult(), mlir::Operation::getResults(), mlir::AffineMap::getResults(), mlir::getUsedValuesDefinedAbove(), mlir::inverseAndBroadcastProjectedPermutation(), mlir::inversePermutation(), LDBG, mlir::IRMapping::map(), VectorizationState::maskOperation(), NewOp, VectorizationResult::newOp, mlir::sparse_tensor::detail::readValue(), reindexIndexingMap(), VectorizationResult::status, mlir::success(), vectorizeLinalgIndex(), vectorizeLinalgYield(), vectorizeOneOp(), and vectorizeTensorExtract().

Referenced by mlir::linalg::vectorize().

◆ vectorizeConvolution()

static FailureOr< Operation * > vectorizeConvolution	(	RewriterBase &	rewriter,
		LinalgOp	convOp
	)

static

Try to vectorize convOp as a convolution.

Helper function to vectorize a LinalgOp with convolution semantics.

Definition at line 2838 of file Vectorization.cpp.

References mlir::succeeded().

Referenced by VectorizeConvolution::matchAndRewrite(), and mlir::linalg::vectorize().

◆ vectorizeDynamicLinalgOpPrecondition()

static LogicalResult vectorizeDynamicLinalgOpPrecondition ( linalg::LinalgOp op )

static

Definition at line 1292 of file Vectorization.cpp.

References mlir::failure(), LDBG, and mlir::success().

Referenced by mlir::linalg::vectorizeLinalgOpPrecondition().

◆ vectorizeLinalgIndex()

static VectorizationResult vectorizeLinalgIndex	(	RewriterBase &	rewriter,
		VectorizationState &	state,
		Operation *	op,
		LinalgOp	linalgOp
	)

static

Helper function to vectorize the index operations of a linalgOp.

Return VectorizationStatus::NewOp to signal the vectorization algorithm that it should map the produced operations. This function is meant to be used as a CustomVectorizationHook.

Definition at line 641 of file Vectorization.cpp.

References mlir::OpBuilder::create(), Failure, VectorizationState::getCanonicalVecShape(), mlir::Builder::getIndexType(), mlir::Builder::getIndexVectorAttr(), and NewOp.

Referenced by vectorizeAsLinalgGeneric().

◆ vectorizeLinalgYield()

static VectorizationResult vectorizeLinalgYield	(	RewriterBase &	rewriter,
		Operation *	op,
		const IRMapping &	bvm,
		VectorizationState &	state,
		LinalgOp	linalgOp,
		SmallVectorImpl< Value > &	newResults
	)

static

Helper function to vectorize the terminator of a linalgOp.

New result vector values are appended to newResults. Return VectorizationStatus::NoReplace to signal the vectorization algorithm that it should not try to map produced operations and instead return the results using the newResults vector making them available to the vectorization algorithm for RAUW. This function is meant to be used as a CustomVectorizationHook.

Definition at line 617 of file Vectorization.cpp.

References buildVectorWrite(), mlir::detail::enumerate(), Failure, mlir::IRMapping::lookup(), and NoReplace.

Referenced by vectorizeAsLinalgGeneric().

◆ vectorizeOneOp()

static VectorizationResult vectorizeOneOp	(	RewriterBase &	rewriter,
		LinalgOp	linalgOp,
		Operation *	op,
		const IRMapping &	bvm,
		ArrayRef< CustomVectorizationHook >	customVectorizationHooks
	)

static

Generic vectorization for a single operation op, given already vectorized operands carried by bvm.

Vectorization occurs as follows:

Try to apply any of the customVectorizationHooks and return its result on success.
Clone any constant in the current scope without vectorization: each consumer of the constant will later determine the shape to which the constant needs to be broadcast to.
Fail on any remaining non ElementwiseMappable op. It is the purpose of the customVectorizationHooks to cover such cases.
Clone op in vector form to a vector of shape prescribed by the first operand of maximal rank. Other operands have smaller rank and are broadcast accordingly. It is assumed this broadcast is always legal, otherwise, it means one of the customVectorizationHooks is incorrect.

This function assumes all operands of op have been vectorized and are in the bvm mapping. As a consequence, this function is meant to be called on a topologically-sorted list of ops. This function does not update bvm but returns a VectorizationStatus that instructs the caller what bvm update needs to occur.

Definition at line 1046 of file Vectorization.cpp.

References mlir::OpBuilder::clone(), mlir::OpBuilder::create(), Failure, mlir::Operation::getAttrs(), mlir::OperationName::getIdentifier(), mlir::Operation::getLoc(), mlir::Operation::getName(), mlir::Operation::getOperands(), mlir::Operation::getResultTypes(), mlir::OpTrait::hasElementwiseMappableTraits(), LDBG, mlir::IRMapping::lookup(), mlir::matchReduction(), NewOp, reduceIfNeeded(), and VectorizationResult::status.

Referenced by vectorizeAsLinalgGeneric().

◆ vectorizeTensorExtract()

static VectorizationResult vectorizeTensorExtract	(	RewriterBase &	rewriter,
		VectorizationState &	state,
		Operation *	op,
		LinalgOp	linalgOp,
		const IRMapping &	bvm
	)

static

Helper function to vectorize the tensor.extract operations.

Returns VectorizationStatus::NewOp to signal the vectorization algorithm that it should map the produced operations. This function is meant to be used as a CustomVectorizationHook.

Definition at line 921 of file Vectorization.cpp.

References calculateGatherOffset(), mlir::OpBuilder::create(), Failure, Gather, mlir::DenseIntElementsAttr::get(), VectorizationState::getCanonicalVecShape(), mlir::Builder::getI1Type(), mlir::Builder::getI32Type(), mlir::Builder::getIndexType(), getTensorExtractMemoryAccessPattern(), mlir::Builder::getZeroAttr(), LDBG, mlir::IRMapping::lookup(), VectorizationState::maskOperation(), and NewOp.

Referenced by vectorizeAsLinalgGeneric().

Classes

Macros

Typedefs

Enumerations

Functions

Macro Definition Documentation

◆ DBGS

◆ DEBUG_TYPE

◆ LDBG

Typedef Documentation

◆ CustomVectorizationHook

◆ CustomVectorizationPrecondition

Enumeration Type Documentation

◆ Conv1DOpOrder

◆ VectorizationStatus

◆ VectorMemoryAccessKind

Function Documentation

◆ bindShapeDims() [1/3]

◆ bindShapeDims() [2/3]

◆ bindShapeDims() [3/3]

◆ broadcastIfNeeded()

◆ buildMultiDimReduce()

◆ buildVectorWrite()

◆ calculateGatherOffset()

◆ convertAffineApply()

◆ extractConvFilterSlices()

◆ extractConvInputSlices()

◆ extractConvResultSlices()

◆ getDimsToReduce()

◆ getIntFromAttr()

◆ getSingleOpOfType()

◆ getSubViewUseIfUnique()

◆ getTensorExtractMemoryAccessPattern()

◆ insertConvResultSlices()

◆ isContiguousLoadIdx()

◆ isLoopInvariantIdx()

◆ matchLinalgReduction()

◆ mayExistInterleavedUses()

◆ ofrToIndexValues()

◆ reduceIfNeeded()

◆ reductionPreconditions()

◆ reindexIndexingMap()

◆ tensorExtractVectorizationPrecondition()

◆ vectorizeAsLinalgGeneric()

◆ vectorizeConvolution()

◆ vectorizeDynamicLinalgOpPrecondition()

◆ vectorizeLinalgIndex()

◆ vectorizeLinalgYield()

◆ vectorizeOneOp()

◆ vectorizeTensorExtract()