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llvm-project/mlir/lib/Dialect/Linalg/IR/LinalgOps.cpp

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//===- LinalgOps.cpp - Implementation of the linalg operations ------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This file implements the Linalg operations.
//
//===----------------------------------------------------------------------===//
#include "mlir/Dialect/Linalg/IR/Linalg.h"
#include "mlir/AsmParser/AsmParser.h"
#include "mlir/Dialect/Affine/IR/AffineOps.h"
#include "mlir/Dialect/Arithmetic/IR/Arithmetic.h"
#include "mlir/Dialect/Arithmetic/Utils/Utils.h"
#include "mlir/Dialect/Complex/IR/Complex.h"
#include "mlir/Dialect/Math/IR/Math.h"
#include "mlir/Dialect/MemRef/IR/MemRef.h"
#include "mlir/Dialect/SCF/IR/SCF.h"
#include "mlir/Dialect/SparseTensor/IR/SparseTensor.h"
#include "mlir/Dialect/Tensor/IR/Tensor.h"
#include "mlir/Dialect/Utils/ReshapeOpsUtils.h"
#include "mlir/Dialect/Utils/StaticValueUtils.h"
#include "mlir/IR/AffineExprVisitor.h"
#include "mlir/IR/AffineMap.h"
#include "mlir/IR/Matchers.h"
#include "mlir/IR/OpImplementation.h"
#include "mlir/IR/PatternMatch.h"
#include "mlir/Interfaces/InferTypeOpInterface.h"
#include "llvm/ADT/DenseMap.h"
#include "llvm/ADT/SetVector.h"
#include "llvm/ADT/SmallSet.h"
#include "llvm/ADT/StringSet.h"
#include "llvm/ADT/TypeSwitch.h"
#include "llvm/Support/FormatVariadic.h"
#include "llvm/Support/MathExtras.h"
#include "llvm/Support/raw_ostream.h"
using namespace mlir;
using namespace mlir::linalg;
//===----------------------------------------------------------------------===//
// Support for named Linalg ops defined in ods-gen.
//===----------------------------------------------------------------------===//
using RegionBuilderFn = llvm::function_ref<void(ImplicitLocOpBuilder &, Block &,
ArrayRef<NamedAttribute>)>;
/// Fills the region of a structured operation using the provided
/// `regionBuilder`. The method is used by both named structured ops created by
/// ods-gen and by manually defined C++ ops. It is called by both builders and
/// parsers and creates a block with arguments corresponding to the elemental
/// types of `inputTypes` and `outputTypes`. All output types are asserted to be
/// ShapedType.
static void fillStructuredOpRegion(OpBuilder &opBuilder, Region &region,
TypeRange inputTypes, TypeRange outputTypes,
ArrayRef<NamedAttribute> attrs,
RegionBuilderFn regionBuilder) {
assert(llvm::all_of(outputTypes, [](Type t) { return t.isa<ShapedType>(); }));
// TODO: atm all operands go through getElementTypeOrSelf,
// reconsider when we have evidence we need to.
SmallVector<Type, 8> argTypes;
SmallVector<Location, 8> argLocs;
for (auto containers : {inputTypes, outputTypes}) {
for (auto t : containers) {
argTypes.push_back(getElementTypeOrSelf(t));
// TODO: Pass in a proper location here.
argLocs.push_back(opBuilder.getUnknownLoc());
}
}
// RAII.
OpBuilder::InsertionGuard guard(opBuilder);
Block *body =
opBuilder.createBlock(&region, /*insertPt=*/{}, argTypes, argLocs);
opBuilder.setInsertionPointToStart(body);
ImplicitLocOpBuilder b(opBuilder.getUnknownLoc(), opBuilder);
regionBuilder(b, *body, attrs);
// indexing_maps is an auto-generated method.
// iterator_types is an auto-generated method.
}
/// Creates a structured operation given `inputs`, `outputs`, and `attributes`.
/// The result types are derived automatically if `resultTensorTypes` is none.
/// The body of the operation is filled using `regionBuilder`. All ods-gen
/// created structured operations use the method to implement their builders.
static void buildStructuredOp(OpBuilder &b, OperationState &state,
llvm::Optional<TypeRange> resultTensorTypes,
ValueRange inputs, ValueRange outputs,
ArrayRef<NamedAttribute> attributes,
RegionBuilderFn regionBuilder) {
// Derive the result types if needed.
SmallVector<Type> derivedResultTypes =
resultTensorTypes.value_or(TypeRange());
if (!resultTensorTypes)
copy_if(outputs.getTypes(), std::back_inserter(derivedResultTypes),
[](Type type) { return type.isa<RankedTensorType>(); });
state.addOperands(inputs);
state.addOperands(outputs);
state.addTypes(derivedResultTypes);
state.addAttributes(attributes);
state.addAttribute(
"operand_segment_sizes",
b.getI32VectorAttr({static_cast<int32_t>(inputs.size()),
static_cast<int32_t>(outputs.size())}));
// Create and fill the region of the structured operation.
Region &region = *state.addRegion();
fillStructuredOpRegion(b, region, TypeRange(inputs), TypeRange(outputs),
state.attributes.getAttrs(), regionBuilder);
}
/// Common parsing used for both named structured ops created by ods-gen and by
/// manually defined C++ ops. Does not handle regions.
static ParseResult
parseCommonStructuredOpParts(OpAsmParser &parser, OperationState &result,
SmallVectorImpl<Type> &inputTypes,
SmallVectorImpl<Type> &outputTypes) {
SMLoc inputsOperandsLoc, outputsOperandsLoc;
SmallVector<OpAsmParser::UnresolvedOperand, 4> inputsOperands,
outputsOperands;
if (parser.parseOptionalAttrDict(result.attributes))
return failure();
if (succeeded(parser.parseOptionalKeyword("ins"))) {
if (parser.parseLParen())
return failure();
inputsOperandsLoc = parser.getCurrentLocation();
if (parser.parseOperandList(inputsOperands) ||
parser.parseColonTypeList(inputTypes) || parser.parseRParen())
return failure();
}
if (succeeded(parser.parseOptionalKeyword("outs"))) {
outputsOperandsLoc = parser.getCurrentLocation();
if (parser.parseLParen() || parser.parseOperandList(outputsOperands) ||
parser.parseColonTypeList(outputTypes) || parser.parseRParen())
return failure();
}
if (parser.resolveOperands(inputsOperands, inputTypes, inputsOperandsLoc,
result.operands) ||
parser.resolveOperands(outputsOperands, outputTypes, outputsOperandsLoc,
result.operands))
return failure();
result.addAttribute("operand_segment_sizes",
parser.getBuilder().getI32VectorAttr(
{static_cast<int32_t>(inputsOperands.size()),
static_cast<int32_t>(outputsOperands.size())}));
return success();
}
static void printCommonStructuredOpParts(OpAsmPrinter &p, ValueRange inputs,
ValueRange outputs) {
if (!inputs.empty())
p << " ins(" << inputs << " : " << inputs.getTypes() << ")";
if (!outputs.empty())
p << " outs(" << outputs << " : " << outputs.getTypes() << ")";
}
//===----------------------------------------------------------------------===//
// Specific parsing and printing for named structured ops created by ods-gen.
//===----------------------------------------------------------------------===//
static ParseResult parseNamedStructuredOpRegion(
OpAsmParser &parser, Region &region, unsigned numRegionArgs,
TypeRange inputTypes, TypeRange outputTypes, ArrayRef<NamedAttribute> attrs,
RegionBuilderFn regionBuilder) {
if (numRegionArgs != inputTypes.size() + outputTypes.size()) {
return parser.emitError(
parser.getCurrentLocation(),
llvm::formatv("[parseNamedStructuredOpRegion] ods-gen generated "
"region expects {0} args, got {1}",
numRegionArgs, inputTypes.size() + outputTypes.size()));
}
OpBuilder opBuilder(parser.getContext());
fillStructuredOpRegion(opBuilder, region, inputTypes, outputTypes, attrs,
regionBuilder);
return success();
}
static ParseResult
parseNamedStructuredOpResults(OpAsmParser &parser,
SmallVectorImpl<Type> &resultTypes) {
if (parser.parseOptionalArrowTypeList(resultTypes))
return failure();
return success();
}
static ParseResult parseNamedStructuredOp(OpAsmParser &parser,
OperationState &result,
unsigned numRegionArgs,
RegionBuilderFn regionBuilder) {
// TODO: Enable when ods-gen supports captures.
SmallVector<Type, 1> inputTypes, outputTypes;
if (parseCommonStructuredOpParts(parser, result, inputTypes, outputTypes))
return failure();
// TODO: consider merging results parsing into region parsing.
// Need to wait for declarative assembly resolution to decide.
SmallVector<Type, 1> outputTensorsTypes;
if (parseNamedStructuredOpResults(parser, outputTensorsTypes))
return failure();
result.addTypes(outputTensorsTypes);
std::unique_ptr<Region> region = std::make_unique<Region>();
if (parseNamedStructuredOpRegion(parser, *region, numRegionArgs, inputTypes,
outputTypes, result.attributes.getAttrs(),
regionBuilder))
return failure();
result.addRegion(std::move(region));
return success();
}
static void printNamedStructuredOpResults(OpAsmPrinter &p,
TypeRange resultTypes) {
if (resultTypes.empty())
return;
p.printOptionalArrowTypeList(resultTypes);
}
static void printNamedStructuredOp(OpAsmPrinter &p, Operation *op,
ValueRange inputs, ValueRange outputs) {
p.printOptionalAttrDict(
op->getAttrs(),
/*elidedAttrs=*/{"operand_segment_sizes",
// See generated code in mlir-linalg-yaml-gen.cpp
"linalg.memoized_indexing_maps"});
// Printing is shared with generic ops, except for the region and
// attributes.
printCommonStructuredOpParts(p, inputs, outputs);
// Results printing.
printNamedStructuredOpResults(p, op->getResultTypes());
// Region is elided.
}
/// This is a common class used for patterns of the form
/// ```
/// someop(memrefcast(%src)) -> someop(%src)
/// ```
/// It folds the source of the memref.cast into the root operation directly.
static LogicalResult foldMemRefCast(Operation *op) {
bool folded = false;
for (OpOperand &operand : op->getOpOperands()) {
auto castOp = operand.get().getDefiningOp<memref::CastOp>();
if (castOp && memref::CastOp::canFoldIntoConsumerOp(castOp)) {
operand.set(castOp.getOperand());
folded = true;
}
}
return success(folded);
}
//===----------------------------------------------------------------------===//
// Region builder helper.
// TODO: Move this to a utility library.
// The public methods on this class are referenced directly from generated code.
// Helper build the unary, binary, and type conversion functions defined by the
// DSL. See mlir-linalg-ods-yaml-gen.cpp for the code that uses this class.
//
// Implementations of the math functions must be polymorphic over numeric types,
// internally performing necessary casts. If the function application makes no
// sense, then the only recourse is to assert and return nullptr. This can be
// extended later if it becomes possible to fail construction of the region. The
// invariant should be enforced at a higher level.
//
// TODO: These helpers are currently type polymorphic over the class of integer
// and floating point types, but they will not internally cast within bit
// widths of a class (mixed precision such as i8->i32) or across classes
// (i.e. mixed float and integer). Many such combinations are ambiguous or need
// to be handled with care and work is being considered to extend the op
// language to make such cases explicit. In the mean-time, violating this will
// fail verification, which is deemed acceptable.
//===----------------------------------------------------------------------===//
namespace {
class RegionBuilderHelper {
public:
RegionBuilderHelper(MLIRContext *context, Block &block)
: context(context), block(block) {}
// Build the unary functions defined by OpDSL.
Value buildUnaryFn(UnaryFn unaryFn, Value arg) {
if (!isFloatingPoint(arg))
llvm_unreachable("unsupported non numeric type");
OpBuilder builder = getBuilder();
switch (unaryFn) {
case UnaryFn::exp:
return builder.create<math::ExpOp>(arg.getLoc(), arg);
case UnaryFn::log:
return builder.create<math::LogOp>(arg.getLoc(), arg);
case UnaryFn::abs:
return builder.create<math::AbsFOp>(arg.getLoc(), arg);
case UnaryFn::ceil:
return builder.create<math::CeilOp>(arg.getLoc(), arg);
case UnaryFn::floor:
return builder.create<math::FloorOp>(arg.getLoc(), arg);
case UnaryFn::negf:
return builder.create<arith::NegFOp>(arg.getLoc(), arg);
}
llvm_unreachable("unsupported unary function");
}
// Build the binary functions defined by OpDSL.
Value buildBinaryFn(BinaryFn binaryFn, Value arg0, Value arg1) {
bool allComplex = isComplex(arg0) && isComplex(arg1);
bool allFloatingPoint = isFloatingPoint(arg0) && isFloatingPoint(arg1);
bool allInteger = isInteger(arg0) && isInteger(arg1);
bool allBool = allInteger && arg0.getType().getIntOrFloatBitWidth() == 1 &&
arg1.getType().getIntOrFloatBitWidth() == 1;
if (!allComplex && !allFloatingPoint && !allInteger)
llvm_unreachable("unsupported non numeric type");
OpBuilder builder = getBuilder();
switch (binaryFn) {
case BinaryFn::add:
if (allComplex)
return builder.create<complex::AddOp>(arg0.getLoc(), arg0, arg1);
if (allFloatingPoint)
return builder.create<arith::AddFOp>(arg0.getLoc(), arg0, arg1);
if (allBool)
return builder.create<arith::OrIOp>(arg0.getLoc(), arg0, arg1);
return builder.create<arith::AddIOp>(arg0.getLoc(), arg0, arg1);
case BinaryFn::sub:
if (allComplex)
return builder.create<complex::SubOp>(arg0.getLoc(), arg0, arg1);
if (allFloatingPoint)
return builder.create<arith::SubFOp>(arg0.getLoc(), arg0, arg1);
if (allBool)
llvm_unreachable("unsupported operation: sub with bools");
return builder.create<arith::SubIOp>(arg0.getLoc(), arg0, arg1);
case BinaryFn::mul:
if (allComplex)
return builder.create<complex::MulOp>(arg0.getLoc(), arg0, arg1);
if (allFloatingPoint)
return builder.create<arith::MulFOp>(arg0.getLoc(), arg0, arg1);
if (allBool)
return builder.create<arith::AndIOp>(arg0.getLoc(), arg0, arg1);
return builder.create<arith::MulIOp>(arg0.getLoc(), arg0, arg1);
case BinaryFn::max_signed:
assert(!allComplex);
if (allFloatingPoint)
return builder.create<arith::MaxFOp>(arg0.getLoc(), arg0, arg1);
return builder.create<arith::MaxSIOp>(arg0.getLoc(), arg0, arg1);
case BinaryFn::min_signed:
assert(!allComplex);
if (allFloatingPoint)
return builder.create<arith::MinFOp>(arg0.getLoc(), arg0, arg1);
return builder.create<arith::MinSIOp>(arg0.getLoc(), arg0, arg1);
case BinaryFn::max_unsigned:
assert(!allComplex);
if (allFloatingPoint)
return builder.create<arith::MaxFOp>(arg0.getLoc(), arg0, arg1);
return builder.create<arith::MaxUIOp>(arg0.getLoc(), arg0, arg1);
case BinaryFn::min_unsigned:
assert(!allComplex);
if (allFloatingPoint)
return builder.create<arith::MinFOp>(arg0.getLoc(), arg0, arg1);
return builder.create<arith::MinUIOp>(arg0.getLoc(), arg0, arg1);
}
llvm_unreachable("unsupported binary function");
}
// Build the type functions defined by OpDSL.
Value buildTypeFn(TypeFn typeFn, Type toType, Value operand) {
switch (typeFn) {
case TypeFn::cast_signed:
return cast(toType, operand, false);
case TypeFn::cast_unsigned:
return cast(toType, operand, true);
}
llvm_unreachable("unsupported type conversion function");
}
void yieldOutputs(ValueRange values) {
OpBuilder builder = getBuilder();
Location loc = builder.getUnknownLoc();
builder.create<YieldOp>(loc, values);
}
Value constant(const std::string &value) {
OpBuilder builder = getBuilder();
Location loc = builder.getUnknownLoc();
Attribute valueAttr = parseAttribute(value, builder.getContext());
Type type = NoneType::get(builder.getContext());
if (auto typedAttr = valueAttr.dyn_cast<TypedAttr>())
type = typedAttr.getType();
return builder.create<arith::ConstantOp>(loc, type, valueAttr);
}
Value index(int64_t dim) {
OpBuilder builder = getBuilder();
return builder.create<IndexOp>(builder.getUnknownLoc(), dim);
}
Type getIntegerType(unsigned width) {
return IntegerType::get(context, width);
}
Type getFloat32Type() { return Float32Type::get(context); }
Type getFloat64Type() { return Float64Type::get(context); }
private:
// Generates operations to cast the given operand to a specified type.
// If the cast cannot be performed, a warning will be issued and the
// operand returned as-is (which will presumably yield a verification
// issue downstream).
Value cast(Type toType, Value operand, bool isUnsignedCast) {
OpBuilder builder = getBuilder();
auto loc = operand.getLoc();
if (operand.getType() == toType)
return operand;
if (auto toIntType = toType.dyn_cast<IntegerType>()) {
// If operand is floating point, cast directly to the int type.
if (operand.getType().isa<FloatType>()) {
if (isUnsignedCast)
return builder.create<arith::FPToUIOp>(loc, toType, operand);
return builder.create<arith::FPToSIOp>(loc, toType, operand);
}
// Cast index operands directly to the int type.
if (operand.getType().isIndex())
return builder.create<arith::IndexCastOp>(loc, toType, operand);
if (auto fromIntType = operand.getType().dyn_cast<IntegerType>()) {
// Either extend or truncate.
if (toIntType.getWidth() > fromIntType.getWidth()) {
if (isUnsignedCast)
return builder.create<arith::ExtUIOp>(loc, toType, operand);
return builder.create<arith::ExtSIOp>(loc, toType, operand);
}
if (toIntType.getWidth() < fromIntType.getWidth())
return builder.create<arith::TruncIOp>(loc, toType, operand);
}
} else if (auto toFloatType = toType.dyn_cast<FloatType>()) {
// If operand is integer, cast directly to the float type.
// Note that it is unclear how to cast from BF16<->FP16.
if (operand.getType().isa<IntegerType>()) {
if (isUnsignedCast)
return builder.create<arith::UIToFPOp>(loc, toFloatType, operand);
return builder.create<arith::SIToFPOp>(loc, toFloatType, operand);
}
if (auto fromFloatType = operand.getType().dyn_cast<FloatType>()) {
if (toFloatType.getWidth() > fromFloatType.getWidth())
return builder.create<arith::ExtFOp>(loc, toFloatType, operand);
if (toFloatType.getWidth() < fromFloatType.getWidth())
return builder.create<arith::TruncFOp>(loc, toFloatType, operand);
}
}
emitWarning(operand.getLoc()) << "could not cast operand of type "
<< operand.getType() << " to " << toType;
return operand;
}
bool isComplex(Value value) { return value.getType().isa<ComplexType>(); }
bool isFloatingPoint(Value value) { return value.getType().isa<FloatType>(); }
bool isInteger(Value value) { return value.getType().isa<IntegerType>(); }
OpBuilder getBuilder() {
OpBuilder builder(context);
builder.setInsertionPointToEnd(&block);
return builder;
}
MLIRContext *context;
Block &block;
};
} // namespace
//===----------------------------------------------------------------------===//
// FillOp
//===----------------------------------------------------------------------===//
namespace {
/// Fold linalg.fill -> tensor.expand/collapse_shape chain.
///
/// For such op chains, we can create new linalg.fill ops with the result
/// type of the tensor.expand/collapse_shape op.
template <typename TensorReshapeOp>
struct FoldFillWithTensorReshape : OpRewritePattern<TensorReshapeOp> {
using OpRewritePattern<TensorReshapeOp>::OpRewritePattern;
LogicalResult matchAndRewrite(TensorReshapeOp reshapeOp,
PatternRewriter &rewriter) const override {
auto oldFill = reshapeOp.getSrc().template getDefiningOp<FillOp>();
if (!oldFill)
return failure();
Location loc = oldFill.getLoc();
auto newInit = rewriter.create<TensorReshapeOp>(
loc, reshapeOp.getResultType(), oldFill.output(),
reshapeOp.getReassociation());
rewriter.replaceOpWithNewOp<FillOp>(reshapeOp, ValueRange{oldFill.value()},
ValueRange{newInit});
return success();
}
};
/// Fold tensor.pad(linalg.fill) into linalg.fill if the padding value and the
/// filling value are the same.
struct FoldFillWithPad final : public OpRewritePattern<tensor::PadOp> {
using OpRewritePattern::OpRewritePattern;
LogicalResult matchAndRewrite(tensor::PadOp padOp,
PatternRewriter &rewriter) const override {
auto fillOp = padOp.getSource().getDefiningOp<linalg::FillOp>();
if (!fillOp)
return failure();
// We can only fold if the padding value is the same as the original
// filling value.
Value padValue = padOp.getConstantPaddingValue();
if (!padValue || fillOp.value() != padValue)
return failure();
ReifiedRankedShapedTypeDims reifiedShape;
ReifyRankedShapedTypeOpInterface interface =
cast<ReifyRankedShapedTypeOpInterface>(padOp.getOperation());
if (failed(interface.reifyResultShapes(rewriter, reifiedShape)))
return rewriter.notifyMatchFailure(
padOp, "failed to reify tensor.pad op result shape");
auto oldResultType = padOp.getResultType();
SmallVector<int64_t, 4> staticShape(oldResultType.getRank(),
ShapedType::kDynamicSize);
auto newInitOp = rewriter.create<InitTensorOp>(
padOp.getLoc(), reifiedShape.front(), staticShape,
oldResultType.getElementType());
auto newFillOp = rewriter.create<FillOp>(
fillOp.getLoc(), ValueRange{padValue}, ValueRange{newInitOp});
rewriter.replaceOpWithNewOp<tensor::CastOp>(padOp, oldResultType,
newFillOp.result());
return success();
}
};
/// Fold tensor.insert_slice(tensor.pad(<input>), linalg.fill) into
/// tensor.insert_slice(<input>, linalg.fill) if the padding value and the
/// filling value are the same.
struct FoldInsertPadIntoFill : public OpRewritePattern<tensor::InsertSliceOp> {
using OpRewritePattern::OpRewritePattern;
LogicalResult matchAndRewrite(tensor::InsertSliceOp insertOp,
PatternRewriter &rewriter) const override {
auto srcPadOp = insertOp.getSource().getDefiningOp<tensor::PadOp>();
if (!srcPadOp)
return failure();
if (insertOp.getType().getRank() != insertOp.getSourceType().getRank())
return failure();
// Walk back the tensor.insert_slice chain and find the first destination
// value at the start of the chain.
Value firstDest = insertOp.getDest();
while (auto prevOp = firstDest.getDefiningOp<tensor::InsertSliceOp>()) {
if (prevOp.getType().getRank() != prevOp.getSourceType().getRank())
return failure();
// Make sure the range of values accessed are disjoint. Without this, we
// cannot fold tensor.pad away.
bool disjoint = false;
for (int i = 0, e = prevOp.getType().getRank(); i < e; ++i) {
// If the dimension has dynamic offset/size, we cannot guarantee
// disjoint. So just skip it.
if (insertOp.isDynamicOffset(i) || insertOp.isDynamicSize(i) ||
insertOp.isDynamicStride(i) || prevOp.isDynamicOffset(i) ||
prevOp.isDynamicSize(i) || prevOp.isDynamicStride(i))
continue;
// Get the range start and end, inclusively for both.
int64_t prevStart = prevOp.getStaticOffset(i);
int64_t prevEnd = prevStart + (prevOp.getStaticSize(i) - 1) *
prevOp.getStaticStride(i);
int64_t nextStart = insertOp.getStaticOffset(i);
int64_t nextEnd = nextStart + (insertOp.getStaticSize(i) - 1) *
insertOp.getStaticStride(i);
if (prevEnd < nextStart || nextEnd < prevStart) {
disjoint = true;
break;
}
}
if (!disjoint)
break;
firstDest = prevOp.getDest();
}
// Check whether the first destination is a fill op. For overlapped cases,
// this also cannot be true.
auto dstFillOp = firstDest.getDefiningOp<linalg::FillOp>();
if (!dstFillOp)
return failure();
// We can only fold if the padding value is the same as the original
// filling value.
Value padValue = srcPadOp.getConstantPaddingValue();
if (!padValue || dstFillOp.value() != padValue)
return failure();
SmallVector<OpFoldResult> lowPads = srcPadOp.getMixedLowPad();
SmallVector<OpFoldResult> oldOffsets = insertOp.getMixedOffsets();
Location loc = insertOp.getLoc();
MLIRContext *context = getContext();
AffineExpr sym0, sym1;
bindSymbols(context, sym0, sym1);
auto addMap = AffineMap::get(0, 2, {sym0 + sym1}, context);
// Calculate the new offsets for the insert. It should be the old offsets
// plus low padding sizes.
SmallVector<OpFoldResult, 4> newOffsets;
for (const auto &p : llvm::zip(lowPads, oldOffsets)) {
newOffsets.push_back(makeComposedFoldedAffineApply(
rewriter, loc, addMap, {std::get<0>(p), std::get<1>(p)}));
}
SmallVector<OpFoldResult, 4> newSizes;
for (int i = 0, e = srcPadOp.getSourceType().getRank(); i < e; ++i) {
newSizes.push_back(
rewriter.create<tensor::DimOp>(loc, srcPadOp.getSource(), i)
.getResult());
}
rewriter.replaceOpWithNewOp<tensor::InsertSliceOp>(
insertOp, srcPadOp.getSource(), insertOp.getDest(), newOffsets,
newSizes, insertOp.getMixedStrides());
return success();
}
};
} // namespace
void FillOp::getCanonicalizationPatterns(RewritePatternSet &results,
MLIRContext *context) {
results
.add<FoldFillWithPad, FoldFillWithTensorReshape<tensor::CollapseShapeOp>,
FoldFillWithTensorReshape<tensor::ExpandShapeOp>,
FoldInsertPadIntoFill>(context);
}
//===----------------------------------------------------------------------===//
// GenericOps
//===----------------------------------------------------------------------===//
void GenericOp::build(
OpBuilder &builder, OperationState &result, TypeRange resultTensorTypes,
ValueRange inputs, ValueRange outputs, ArrayAttr indexingMaps,
ArrayAttr iteratorTypes, StringAttr doc, StringAttr libraryCall,
function_ref<void(OpBuilder &, Location, ValueRange)> bodyBuild,
ArrayRef<NamedAttribute> attributes) {
build(builder, result, resultTensorTypes, inputs, outputs, indexingMaps,
iteratorTypes, doc, libraryCall);
result.addAttributes(attributes);
if (!bodyBuild)
return;
SmallVector<Type, 4> blockArgTypes;
SmallVector<Location, 4> blockArgLocs;
for (ValueRange container : {inputs, outputs}) {
for (Value v : container) {
blockArgTypes.push_back(getElementTypeOrSelf(v));
blockArgLocs.push_back(v.getLoc());
}
}
OpBuilder::InsertionGuard guard(builder);
auto &region = *result.regions.front();
Block *bodyBlock =
builder.createBlock(&region, region.end(), blockArgTypes, blockArgLocs);
bodyBuild(builder, result.location, bodyBlock->getArguments());
}
void GenericOp::build(
OpBuilder &builder, OperationState &result, TypeRange resultTensorTypes,
ValueRange inputs, ValueRange outputs, ArrayRef<AffineMap> indexingMaps,
ArrayRef<StringRef> iteratorTypes, StringRef doc, StringRef libraryCall,
function_ref<void(OpBuilder &, Location, ValueRange)> bodyBuild,
ArrayRef<NamedAttribute> attributes) {
build(builder, result, resultTensorTypes, inputs, outputs,
builder.getAffineMapArrayAttr(indexingMaps),
builder.getStrArrayAttr(iteratorTypes),
doc.empty() ? StringAttr() : builder.getStringAttr(doc),
libraryCall.empty() ? StringAttr() : builder.getStringAttr(libraryCall),
bodyBuild, attributes);
}
void GenericOp::build(
OpBuilder &builder, OperationState &result, ValueRange inputs,
ValueRange outputs, ArrayRef<AffineMap> indexingMaps,
ArrayRef<StringRef> iteratorTypes, StringRef doc, StringRef libraryCall,
function_ref<void(OpBuilder &, Location, ValueRange)> bodyBuild,
ArrayRef<NamedAttribute> attributes) {
build(builder, result, TypeRange{}, inputs, outputs, indexingMaps,
iteratorTypes, doc, libraryCall, bodyBuild, attributes);
}
void GenericOp::build(
OpBuilder &builder, OperationState &result, ValueRange inputs,
ValueRange outputs, ArrayRef<AffineMap> indexingMaps,
ArrayRef<StringRef> iteratorTypes,
function_ref<void(OpBuilder &, Location, ValueRange)> bodyBuild,
ArrayRef<NamedAttribute> attributes) {
build(builder, result, inputs, outputs, indexingMaps, iteratorTypes,
/*doc=*/"",
/*libraryCall=*/"", bodyBuild, attributes);
}
void GenericOp::build(
OpBuilder &builder, OperationState &result, TypeRange resultTensorTypes,
ValueRange inputs, ValueRange outputs, ArrayRef<AffineMap> indexingMaps,
ArrayRef<StringRef> iteratorTypes,
function_ref<void(OpBuilder &, Location, ValueRange)> bodyBuild,
ArrayRef<NamedAttribute> attributes) {
build(builder, result, resultTensorTypes, inputs, outputs, indexingMaps,
iteratorTypes,
/*doc=*/"",
/*libraryCall=*/"", bodyBuild, attributes);
}
void GenericOp::print(OpAsmPrinter &p) {
p << " ";
// Print extra attributes.
auto genericAttrNames = linalgTraitAttrNames();
llvm::StringSet<> genericAttrNamesSet;
genericAttrNamesSet.insert(genericAttrNames.begin(), genericAttrNames.end());
SmallVector<NamedAttribute, 8> genericAttrs;
for (auto attr : (*this)->getAttrs())
if (genericAttrNamesSet.count(attr.getName().strref()) > 0)
genericAttrs.push_back(attr);
if (!genericAttrs.empty()) {
auto genericDictAttr = DictionaryAttr::get(getContext(), genericAttrs);
p << genericDictAttr;
}
// Printing is shared with named ops, except for the region and attributes
printCommonStructuredOpParts(p, getInputs(), getOutputs());
genericAttrNames.push_back("operand_segment_sizes");
genericAttrNamesSet.insert(genericAttrNames.back());
bool hasExtraAttrs = false;
for (NamedAttribute n : (*this)->getAttrs()) {
if ((hasExtraAttrs = !genericAttrNamesSet.contains(n.getName().strref())))
break;
}
if (hasExtraAttrs) {
p << " attrs = ";
p.printOptionalAttrDict((*this)->getAttrs(),
/*elidedAttrs=*/genericAttrNames);
}
// Print region.
if (!getRegion().empty()) {
p << ' ';
p.printRegion(getRegion());
}
// Print results.
printNamedStructuredOpResults(p, getResultTensors().getTypes());
}
ParseResult GenericOp::parse(OpAsmParser &parser, OperationState &result) {
DictionaryAttr dictAttr;
// Parse the core linalg traits that must check into a dictAttr.
// The name is unimportant as we will overwrite result.attributes.
// The core linalg traits must contain the information necessary to pass the
// verifier.
if (parser.parseAttribute(dictAttr, "_", result.attributes))
return failure();
result.attributes.assign(dictAttr.getValue().begin(),
dictAttr.getValue().end());
// Parsing is shared with named ops, except for the region.
SmallVector<Type, 1> inputTypes, outputTypes;
if (parseCommonStructuredOpParts(parser, result, inputTypes, outputTypes))
return failure();
// Optional attributes may be added.
if (succeeded(parser.parseOptionalKeyword("attrs")))
if (failed(parser.parseEqual()) ||
failed(parser.parseOptionalAttrDict(result.attributes)))
return failure();
std::unique_ptr<Region> region = std::make_unique<Region>();
if (parser.parseRegion(*region, {}))
return failure();
result.addRegion(std::move(region));
// Generic ops may specify that a subset of its outputs are tensors. Such
// outputs are specified in the result type.
// TODO: may need to move output parsing before region parsing.
// Need to wait for declarative assembly resolution to decide.
SmallVector<Type, 1> outputTensorsTypes;
if (parseNamedStructuredOpResults(parser, outputTensorsTypes))
return failure();
result.addTypes(outputTensorsTypes);
return success();
}
static void getGenericEffectsImpl(
SmallVectorImpl<SideEffects::EffectInstance<MemoryEffects::Effect>>
&effects,
ValueRange results, ValueRange inputBuffers, ValueRange outputs) {
for (Value value : inputBuffers) {
effects.emplace_back(MemoryEffects::Read::get(), value,
SideEffects::DefaultResource::get());
}
for (Value value : outputs) {
effects.emplace_back(MemoryEffects::Read::get(), value,
SideEffects::DefaultResource::get());
effects.emplace_back(MemoryEffects::Write::get(), value,
SideEffects::DefaultResource::get());
}
}
void GenericOp::getEffects(
SmallVectorImpl<SideEffects::EffectInstance<MemoryEffects::Effect>>
&effects) {
SmallVector<Value> inputBuffers = getInputBufferOperands();
SmallVector<Value> outputBuffers = getOutputBufferOperands();
getGenericEffectsImpl(effects, getOperation()->getResults(), inputBuffers,
outputBuffers);
}
LogicalResult GenericOp::verify() { return success(); }
namespace {
struct DeduplicateAndRemoveDeadOperandsAndResults
: public OpRewritePattern<GenericOp> {
using OpRewritePattern<GenericOp>::OpRewritePattern;
LogicalResult matchAndRewrite(GenericOp genericOp,
PatternRewriter &rewriter) const override {
// Create a map from argument position in the original op to the argument
// position in the new op. If the argument is dropped it wont have an entry.
SmallVector<OpOperand *> droppedOpOperands;
// Information needed to build the new op.
SmallVector<Value> newInputOperands, newOutputOperands;
SmallVector<AffineMap> newIndexingMaps;
// Gather information about duplicate input operands.
llvm::SmallDenseMap<unsigned, unsigned> origInsToNewInsPos =
deduplicateInputOperands(genericOp, droppedOpOperands, newInputOperands,
newIndexingMaps);
// Gather information about the dropped outputs.
llvm::SmallDenseMap<unsigned, unsigned> origOutsToNewOutsPos =
deduplicateOutputOperands(genericOp, droppedOpOperands,
newOutputOperands, newIndexingMaps);
// Check if there is any change to operands.
if (newInputOperands.size() + newOutputOperands.size() ==
static_cast<size_t>(genericOp.getNumInputsAndOutputs()))
return failure();
// Create the new op with the body being empty.
Location loc = genericOp.getLoc();
SmallVector<Type> newResultTypes;
if (genericOp.hasTensorSemantics()) {
newResultTypes = llvm::to_vector(llvm::map_range(
newOutputOperands, [](Value v) { return v.getType(); }));
}
auto newOp = rewriter.create<GenericOp>(
loc, newResultTypes, newInputOperands, newOutputOperands,
rewriter.getAffineMapArrayAttr(newIndexingMaps),
genericOp.getIteratorTypes(), genericOp.getDocAttr(),
genericOp.getLibraryCallAttr(),
[](OpBuilder & /*builder*/, Location /*loc*/, ValueRange /*args*/) {
return;
});
// Copy over unknown attributes. They might be load bearing for some flow.
ArrayRef<StringRef> odsAttrs = genericOp.getAttributeNames();
for (NamedAttribute kv : genericOp->getAttrs())
if (!llvm::is_contained(odsAttrs, kv.getName().getValue()))
newOp->setAttr(kv.getName(), kv.getValue());
// Fix up the payload of the canonicalized operation.
populateOpPayload(genericOp, newOp, origInsToNewInsPos,
origOutsToNewOutsPos, rewriter);
// Replace all live uses of the op.
SmallVector<Value> replacementsVals(genericOp->getNumResults(), nullptr);
for (const auto &result : llvm::enumerate(genericOp.getResults())) {
auto it = origOutsToNewOutsPos.find(result.index());
if (it == origOutsToNewOutsPos.end())
continue;
replacementsVals[result.index()] = newOp.getResult(it->second);
}
rewriter.replaceOp(genericOp, replacementsVals);
return success();
}
private:
// Deduplicate input operands, and return the
// - Mapping from operand position in the original op, to operand position in
// the canonicalized op.
// - The preserved input operands list (by reference).
llvm::SmallDenseMap<unsigned, unsigned>
deduplicateInputOperands(GenericOp genericOp,
SmallVector<OpOperand *> &droppedOpOperands,
SmallVector<Value> &newInputOperands,
SmallVector<AffineMap> &newIndexingMaps) const {
llvm::SmallDenseMap<unsigned, unsigned> origToNewPos;
llvm::SmallDenseMap<std::pair<Value, AffineMap>, unsigned> dedupedInputs;
for (const auto &inputOpOperand :
llvm::enumerate(genericOp.getInputOperands())) {
// Check if operand is dead and if dropping the indexing map makes the
// loops to shape computation invalid.
if (!genericOp.payloadUsesValueFromOperand(inputOpOperand.value())) {
// Add the current operands to the list of potentially droppable
// operands. If it cannot be dropped, this needs to be popped back.
droppedOpOperands.push_back(inputOpOperand.value());
if (genericOp.canOpOperandsBeDropped(droppedOpOperands))
continue;
droppedOpOperands.pop_back();
}
// Check if this operand is a duplicate.
AffineMap indexingMap =
genericOp.getTiedIndexingMap(inputOpOperand.value());
auto it = dedupedInputs.find(
std::make_pair(inputOpOperand.value()->get(), indexingMap));
if (it != dedupedInputs.end()) {
origToNewPos[inputOpOperand.index()] = it->second;
droppedOpOperands.push_back(inputOpOperand.value());
continue;
}
// This is a preserved argument.
origToNewPos[inputOpOperand.index()] = newInputOperands.size();
dedupedInputs[{inputOpOperand.value()->get(), indexingMap}] =
newInputOperands.size();
newInputOperands.push_back(inputOpOperand.value()->get());
newIndexingMaps.push_back(indexingMap);
}
return origToNewPos;
}
// Deduplicate output operands, and return the
// - Mapping from operand position in the original op, to operand position in
// the canonicalized op.
// - The preserved output operands list (by reference).
llvm::SmallDenseMap<unsigned, unsigned>
deduplicateOutputOperands(GenericOp genericOp,
SmallVector<OpOperand *> &droppedOpOperands,
SmallVector<Value> &newOutputOperands,
SmallVector<AffineMap> &newIndexingMaps) const {
llvm::SmallDenseMap<unsigned, unsigned> origToNewPos;
llvm::SmallDenseMap<std::tuple<Value, AffineMap, Value>, unsigned>
dedupedOutpts;
// If the op doesnt have tensor semantics, keep all the outputs as
// preserved.
if (!genericOp.hasTensorSemantics()) {
for (const auto &outputOpOperand :
llvm::enumerate(genericOp.getOutputOperands())) {
origToNewPos[outputOpOperand.index()] = newOutputOperands.size();
newOutputOperands.push_back(outputOpOperand.value()->get());
newIndexingMaps.push_back(
genericOp.getTiedIndexingMap(outputOpOperand.value()));
}
} else {
// Output argument can be dropped if the result has
// - no users, and
// - it is not used in the payload, and
// - the corresponding indexing maps are not needed for loop bound
// computation.
auto yieldOp = cast<YieldOp>(genericOp.getBody()->getTerminator());
for (const auto &outputOpOperand :
llvm::enumerate(genericOp.getOutputOperands())) {
Value result = genericOp.getResult(outputOpOperand.index());
AffineMap indexingMap =
genericOp.getTiedIndexingMap(outputOpOperand.value());
auto key =
std::make_tuple(outputOpOperand.value()->get(), indexingMap,
yieldOp->getOperand(outputOpOperand.index()));
// Do not drop an out if its value is used in the payload.
if (!genericOp.payloadUsesValueFromOperand(outputOpOperand.value())) {
if (result.use_empty()) {
// Check if the opoperand can be dropped without affecting loop
// bound computation. Add the operand to the list of dropped op
// operand for checking. If it cannot be dropped, need to pop the
// value back.
droppedOpOperands.push_back(outputOpOperand.value());
if (genericOp.canOpOperandsBeDropped(droppedOpOperands)) {
continue;
}
droppedOpOperands.pop_back();
}
// The out operand can also be dropped if it is computed redundantly
// by another result, the conditions for that are
// - The same operand is used as the out operand
// - The same indexing map is used
// - The same yield value is used.
auto it = dedupedOutpts.find(key);
if (it != dedupedOutpts.end()) {
origToNewPos[outputOpOperand.index()] = it->second;
droppedOpOperands.push_back(outputOpOperand.value());
continue;
}
}
origToNewPos[outputOpOperand.index()] = newOutputOperands.size();
dedupedOutpts[key] = newOutputOperands.size();
newOutputOperands.push_back(outputOpOperand.value()->get());
newIndexingMaps.push_back(
genericOp.getTiedIndexingMap(outputOpOperand.value()));
}
}
return origToNewPos;
}
// Populate the body of the canonicalized operation.
void populateOpPayload(
GenericOp genericOp, GenericOp newOp,
const llvm::SmallDenseMap<unsigned, unsigned> &origInsToNewInsPos,
const llvm::SmallDenseMap<unsigned, unsigned> &origOutsToNewOutsPos,
PatternRewriter &rewriter) const {
// Merge the body of the original op with the new op.
Block *newOpBlock = &newOp.getRegion().front();
assert(newOpBlock->empty() && "expected new op to have an empty payload");
Block *origOpBlock = &genericOp.getRegion().front();
SmallVector<Value> replacements(origOpBlock->getNumArguments(), nullptr);
// Replace all arguments in the original op, with arguments from the
// canonicalized op.
auto updateReplacements =
[&](OpOperandVector &origOperands, OpOperandVector &newOperands,
const llvm::SmallDenseMap<unsigned, unsigned> &map) {
for (const auto &origOperand : llvm::enumerate(origOperands)) {
auto it = map.find(origOperand.index());
if (it == map.end())
continue;
OpOperand *newOperand = newOperands[it->second];
replacements[origOperand.value()->getOperandNumber()] =
newOpBlock->getArgument(newOperand->getOperandNumber());
}
};
OpOperandVector origInputOperands = genericOp.getInputOperands();
OpOperandVector newInputOperands = newOp.getInputOperands();
updateReplacements(origInputOperands, newInputOperands, origInsToNewInsPos);
OpOperandVector origOutputOperands = genericOp.getOutputOperands();
OpOperandVector newOutputOperands = newOp.getOutputOperands();
updateReplacements(origOutputOperands, newOutputOperands,
origOutsToNewOutsPos);
rewriter.mergeBlocks(origOpBlock, newOpBlock, replacements);
// Drop the unused yield args.
if (newOp.getNumOutputs() != genericOp.getNumOutputs()) {
OpBuilder::InsertionGuard g(rewriter);
YieldOp origYieldOp = cast<YieldOp>(newOpBlock->getTerminator());
rewriter.setInsertionPoint(origYieldOp);
SmallVector<Value> newYieldVals(newOp.getNumOutputs(), nullptr);
for (const auto &yieldOpOperands :
llvm::enumerate(origYieldOp.getValues())) {
auto it = origOutsToNewOutsPos.find(yieldOpOperands.index());
if (it == origOutsToNewOutsPos.end())
continue;
newYieldVals[it->second] = yieldOpOperands.value();
}
rewriter.replaceOpWithNewOp<YieldOp>(origYieldOp, newYieldVals);
}
}
};
/// Remove generic operations (on tensors) that are just copying
/// the values from inputs to the results. Requirements are
/// 1) All iterator types are parallel
/// 2) The body contains just a yield operation with the yielded values being
/// the arguments corresponding to the operands.
struct EraseIdentityGenericOp : public OpRewritePattern<GenericOp> {
using OpRewritePattern<GenericOp>::OpRewritePattern;
LogicalResult matchAndRewrite(GenericOp genericOp,
PatternRewriter &rewriter) const override {
// Check all indexing maps are identity.
if (llvm::any_of(genericOp.getIndexingMapsArray(),
[](AffineMap map) { return !map.isIdentity(); }))
return failure();
// Check that the body of the linalg operation is just a linalg.yield
// operation.
Block &body = genericOp.getRegion().front();
if (!llvm::hasSingleElement(body))
return failure();
auto yieldOp = dyn_cast<linalg::YieldOp>(body.getTerminator());
if (!yieldOp)
return failure();
// In the buffer case, we need to check exact buffer equality.
if (genericOp.hasBufferSemantics()) {
if (genericOp.getNumInputs() == 1 && genericOp.getNumOutputs() == 1 &&
genericOp.getInputOperand(0)->get() ==
genericOp.getOutputOperand(0)->get()) {
rewriter.eraseOp(genericOp);
return success();
}
return failure();
}
// Get the argument number of the returned values. That is the operand
// number to use for replacing uses of this operation.
SmallVector<Value> returnedArgs;
for (const auto &yieldVal : llvm::enumerate(yieldOp.getValues())) {
auto yieldArg = yieldVal.value().dyn_cast<BlockArgument>();
if (!yieldArg || yieldArg.getOwner() != &body)
return failure();
unsigned argumentNumber = yieldArg.getArgNumber();
Value returnedArg = genericOp->getOperand(argumentNumber);
Type resultType = genericOp->getResult(yieldVal.index()).getType();
// The input can have a different type than the result, e.g. a dynamic
// input dimension can be turned into a static output dimension.
Type returnType = returnedArg.getType();
if (returnType != resultType) {
// Distinguish between sparse conversion or dense tensor casting.
// TODO: unify the two ops?
if (sparse_tensor::getSparseTensorEncoding(returnType) ||
sparse_tensor::getSparseTensorEncoding(resultType))
returnedArg = rewriter.create<sparse_tensor::ConvertOp>(
genericOp.getLoc(), resultType, returnedArg);
else {
if (!tensor::CastOp::areCastCompatible(returnedArg.getType(),
resultType))
return failure();
returnedArg = rewriter.create<tensor::CastOp>(
genericOp.getLoc(), resultType, returnedArg);
}
}
returnedArgs.push_back(returnedArg);
}
if (returnedArgs.size() != genericOp->getNumResults())
return failure();
rewriter.replaceOp(genericOp, returnedArgs);
return success();
}
};
} // namespace
void GenericOp::getCanonicalizationPatterns(RewritePatternSet &results,
MLIRContext *context) {
results
.add<DeduplicateAndRemoveDeadOperandsAndResults, EraseIdentityGenericOp>(
context);
}
LogicalResult GenericOp::fold(ArrayRef<Attribute>,
SmallVectorImpl<OpFoldResult> &) {
return foldMemRefCast(*this);
}
//===----------------------------------------------------------------------===//
// InitTensorOp
//===----------------------------------------------------------------------===//
void InitTensorOp::build(OpBuilder &b, OperationState &result,
ArrayRef<OpFoldResult> sizes, Type elementType,
ArrayRef<NamedAttribute> attrs) {
SmallVector<Value, 4> dynamicSizes;
SmallVector<int64_t, 4> staticSizes;
dispatchIndexOpFoldResults(sizes, dynamicSizes, staticSizes,
ShapedType::kDynamicSize);
auto resultType = RankedTensorType ::get(staticSizes, elementType);
build(b, result, resultType, dynamicSizes, b.getI64ArrayAttr(staticSizes));
result.addAttributes(attrs);
}
LogicalResult InitTensorOp::verify() {
RankedTensorType resultType = getType();
SmallVector<int64_t, 4> staticSizes = llvm::to_vector<4>(llvm::map_range(
getStaticSizes().cast<ArrayAttr>(),
[](Attribute a) -> int64_t { return a.cast<IntegerAttr>().getInt(); }));
if (failed(verifyListOfOperandsOrIntegers(
*this, "sizes", resultType.getRank(), getStaticSizes(), getSizes(),
ShapedType::isDynamic)))
return failure();
if (getStaticSizes().size() != static_cast<unsigned>(resultType.getRank()))
return emitError("expected ") << resultType.getRank() << " sizes values";
Type expectedType = InitTensorOp::inferResultType(
staticSizes, resultType.getElementType(), resultType.getEncoding());
if (resultType != expectedType) {
return emitError("specified type ")
<< resultType << " does not match the inferred type "
<< expectedType;
}
return success();
}
Type InitTensorOp::inferResultType(ArrayRef<int64_t> staticSizes,
Type elementType, Attribute encoding) {
return RankedTensorType::get(staticSizes, elementType, encoding);
}
SmallVector<OpFoldResult> InitTensorOp::getMixedSizes() {
SmallVector<OpFoldResult> mixedSizes;
mixedSizes.reserve(getType().getRank());
unsigned dynamicValIndex = 0;
for (Attribute attr : getStaticSizes()) {
auto intAttr = attr.cast<IntegerAttr>();
if (!ShapedType::isDynamic(intAttr.getInt())) {
mixedSizes.push_back(intAttr);
continue;
}
mixedSizes.push_back(getSizes()[dynamicValIndex++]);
}
return mixedSizes;
}
namespace {
/// Change the type of the result of a `linalg.init_tensor` by making the result
/// type statically sized along dimension that in the original operation where
/// defined as dynamic, but the size was defined using a `constant` op. For
/// example
///
/// %c5 = arith.constant 5: index
/// %0 = linalg.init_tensor [%arg0, %c5] : tensor<?x?xf32>
///
/// to
///
/// %0 = linalg.init_tensor [%arg0, 5] : tensor<?x5xf32>
struct ReplaceStaticShapeDims : OpRewritePattern<InitTensorOp> {
using OpRewritePattern<InitTensorOp>::OpRewritePattern;
LogicalResult matchAndRewrite(InitTensorOp op,
PatternRewriter &rewriter) const override {
SmallVector<Value, 4> dynamicSizes;
SmallVector<int64_t, 4> staticSizes;
for (unsigned i = 0, e = op.getType().getRank(); i != e; ++i) {
// If the size is already static, nothing to do.
if (!op.isDynamicSize(i)) {
staticSizes.push_back(op.getStaticSize(i));
continue;
}
// If the size is dynamic but defined using a `constant` op, get the
// constant value to find the static size to use.
unsigned operandNum = op.getIndexOfDynamicSize(i);
Value sizeOperand = op.getOperand(operandNum);
if (auto constantIndexOp =
sizeOperand.getDefiningOp<arith::ConstantIndexOp>()) {
staticSizes.push_back(constantIndexOp.value());
continue;
}
// Fallback case. Keep the size dynamic.
dynamicSizes.push_back(sizeOperand);
staticSizes.push_back(ShapedType::kDynamicSize);
}
RankedTensorType newType =
RankedTensorType::get(staticSizes, op.getType().getElementType());
if (newType == op.getType())
return failure();
auto newOp =
rewriter.create<InitTensorOp>(op.getLoc(), newType, dynamicSizes,
rewriter.getI64ArrayAttr(staticSizes));
rewriter.replaceOpWithNewOp<tensor::CastOp>(op, op.getType(), newOp);
return success();
}
};
} // namespace
namespace {
/// Since `init_tensor` operation creates a tensor needed only for its shape, a
/// slice of this is also needed only for its shape. The result can be
/// replaced by a new init_tensor operation of the same size as the extract
/// slice op.
struct FoldInitTensorWithExtractSliceOp
: public OpRewritePattern<tensor::ExtractSliceOp> {
using OpRewritePattern<tensor::ExtractSliceOp>::OpRewritePattern;
LogicalResult matchAndRewrite(tensor::ExtractSliceOp sliceOp,
PatternRewriter &rewriter) const override {
if (!sliceOp.getSource().getDefiningOp<linalg::InitTensorOp>())
return failure();
// ExtractSliceOp may be rank-reducing; its dynamic sizes must be preserved
// as well as its result type.
rewriter.replaceOpWithNewOp<linalg::InitTensorOp>(
sliceOp, sliceOp.getSizes(),
sliceOp.getResult().getType().cast<RankedTensorType>().getShape(),
sliceOp.getSourceType().getElementType());
return success();
}
};
template <typename TensorReshapeOp>
struct FoldInitTensorWithTensorReshapeOp
: public OpRewritePattern<TensorReshapeOp> {
using OpRewritePattern<TensorReshapeOp>::OpRewritePattern;
LogicalResult matchAndRewrite(TensorReshapeOp reshapeOp,
PatternRewriter &rewriter) const override {
if (!reshapeOp.getSrc().template getDefiningOp<InitTensorOp>())
return failure();
Location loc = reshapeOp.getLoc();
ReifiedRankedShapedTypeDims resultShapes;
ReifyRankedShapedTypeOpInterface reifyShapedTypeInterface =
cast<ReifyRankedShapedTypeOpInterface>(reshapeOp.getOperation());
if (failed(reifyShapedTypeInterface.reifyResultShapes(rewriter,
resultShapes)) ||
!llvm::hasSingleElement(resultShapes))
return failure();
Value initTensor = rewriter.create<InitTensorOp>(
loc, getAsOpFoldResult(resultShapes[0]),
reshapeOp.getResultType().getElementType());
if (initTensor.getType() != reshapeOp.getResultType()) {
rewriter.replaceOpWithNewOp<tensor::CastOp>(
reshapeOp, reshapeOp.getResultType(), initTensor);
} else {
rewriter.replaceOp(reshapeOp, initTensor);
}
return success();
}
};
struct FoldInitTensorWithDimOp : public OpRewritePattern<tensor::DimOp> {
using OpRewritePattern<tensor::DimOp>::OpRewritePattern;
LogicalResult matchAndRewrite(tensor::DimOp dimOp,
PatternRewriter &rewriter) const override {
Optional<int64_t> maybeConstantIndex = dimOp.getConstantIndex();
auto initTensorOp = dimOp.getSource().getDefiningOp<linalg::InitTensorOp>();
if (!initTensorOp || !maybeConstantIndex)
return failure();
if (!initTensorOp.isDynamicSize(*maybeConstantIndex))
return failure();
rewriter.replaceOp(dimOp, initTensorOp.getDynamicSize(*maybeConstantIndex));
return success();
}
};
/// Canonicalize
///
/// ```mlir
/// %0 = linalg.init_tensor [%d0, %d1] : tensor<?x?xf32>
/// %1 = tensor.cast %0 : tensor<?x?xf32> to tensor<4x?xf32>
/// ```
///
/// into
///
/// ```mlir
/// %0 = linalg.init_tensor [4, %d1] : tensor<4x?xf32>
/// ```
///
/// This assumes the input program is correct in terms of its shape. So it
/// is safe to assume that `%d0` is in fact 4. If that was not the case, the
/// input program is wrong to begin with, so its undefined behavior anyway (i.e.
/// this optimization can still triggering without violating program semantics).
struct FoldInitTensorWithTensorCastOp
: public OpRewritePattern<tensor::CastOp> {
using OpRewritePattern<tensor::CastOp>::OpRewritePattern;
LogicalResult matchAndRewrite(tensor::CastOp castOp,
PatternRewriter &rewriter) const override {
if (!canFoldIntoProducerOp(castOp))
return failure();
auto producer = castOp.getSource().getDefiningOp<InitTensorOp>();
if (!producer)
return failure();
auto resultType = castOp->getResult(0).getType().cast<RankedTensorType>();
ArrayRef<int64_t> resultShape = resultType.getShape();
SmallVector<OpFoldResult> currMixedSizes = producer.getMixedSizes();
SmallVector<OpFoldResult> newMixedSizes;
newMixedSizes.reserve(currMixedSizes.size());
assert(resultShape.size() == currMixedSizes.size() &&
"mismatch in result shape and sizes of init_tensor op");
for (auto it : llvm::zip(resultShape, currMixedSizes)) {
int64_t newDim = std::get<0>(it);
OpFoldResult currDim = std::get<1>(it);
// Case 1: The init tensor dim is static. Check that the tensor cast
// result dim matches.
if (auto attr = currDim.dyn_cast<Attribute>()) {
if (ShapedType::isDynamic(newDim) ||
newDim != attr.cast<IntegerAttr>().getInt()) {
// Something is off, the cast result shape cannot be more dynamic than
// the init tensor result shape (enforced by `canFoldIntoProducer`).
// Abort for now.
return rewriter.notifyMatchFailure(
producer, "mismatch in static value of shape of init "
"tensor result and cast result");
}
newMixedSizes.push_back(attr);
continue;
}
// Case 2 : The tensor cast shape is static, but init tensor result shape
// is dynamic.
if (!ShapedType::isDynamic(newDim)) {
newMixedSizes.push_back(rewriter.getIndexAttr(newDim));
continue;
}
// Case 3 : The tensor cast shape is dynamic and init tensor result shape
// is dynamic. Use the dynamic value from the init tensor op.
newMixedSizes.push_back(currDim);
}
rewriter.replaceOpWithNewOp<InitTensorOp>(castOp, newMixedSizes,
resultType.getElementType());
return success();
}
};
} // namespace
void InitTensorOp::getCanonicalizationPatterns(RewritePatternSet &results,
MLIRContext *context) {
results.add<FoldInitTensorWithTensorCastOp, FoldInitTensorWithDimOp,
FoldInitTensorWithExtractSliceOp,
FoldInitTensorWithTensorReshapeOp<tensor::ExpandShapeOp>,
FoldInitTensorWithTensorReshapeOp<tensor::CollapseShapeOp>,
ReplaceStaticShapeDims>(context);
}
LogicalResult InitTensorOp::reifyResultShapes(
OpBuilder &builder, ReifiedRankedShapedTypeDims &reifiedReturnShapes) {
auto shapes = llvm::to_vector<4>(llvm::map_range(
llvm::seq<int64_t>(0, getType().getRank()), [&](int64_t dim) -> Value {
if (isDynamicSize(dim))
return getDynamicSize(dim);
return builder.create<arith::ConstantIndexOp>(getLoc(),
getStaticSize(dim));
}));
reifiedReturnShapes.emplace_back(std::move(shapes));
return success();
}
//===----------------------------------------------------------------------===//
// YieldOp
//===----------------------------------------------------------------------===//
void linalg::YieldOp::print(OpAsmPrinter &p) {
if (getNumOperands() > 0)
p << ' ' << getOperands();
p.printOptionalAttrDict((*this)->getAttrs());
if (getNumOperands() > 0)
p << " : " << getOperandTypes();
}
ParseResult YieldOp::parse(OpAsmParser &parser, OperationState &result) {
SmallVector<OpAsmParser::UnresolvedOperand, 2> opInfo;
SmallVector<Type, 2> types;
SMLoc loc = parser.getCurrentLocation();
return failure(parser.parseOperandList(opInfo) ||
parser.parseOptionalAttrDict(result.attributes) ||
(!opInfo.empty() && parser.parseColonTypeList(types)) ||
parser.resolveOperands(opInfo, types, loc, result.operands));
}
// Check the operand number and types must match the element types of the
// LinalgOp interface's shaped operands.
static LogicalResult verifyYield(linalg::YieldOp op, LinalgOp linalgOp) {
if (op.getNumOperands() != linalgOp.getNumOutputs())
return op.emitOpError("expected number of yield values (")
<< linalgOp.getNumOutputs()
<< ") to match the number of operands of the enclosing "
<< "LinalgOp (" << op.getNumOperands() << ")";
for (OpOperand &opOperand : op->getOpOperands()) {
OpOperand *outputOperand =
linalgOp.getOutputOperand(opOperand.getOperandNumber());
Type elementType = getElementTypeOrSelf(outputOperand->get().getType());
if (opOperand.get().getType() != elementType)
return op.emitOpError("type of yield operand ")
<< (opOperand.getOperandNumber() + 1) << " ("
<< opOperand.get().getType() << ") doesn't match "
<< "the element type of the enclosing linalg.generic op ("
<< elementType << ")";
}
return success();
}
LogicalResult linalg::YieldOp::verify() {
auto *parentOp = (*this)->getParentOp();
if (parentOp->getNumRegions() != 1 || parentOp->getRegion(0).empty())
return emitOpError("expected single non-empty parent region");
if (auto linalgOp = dyn_cast<LinalgOp>(parentOp))
return verifyYield(*this, linalgOp);
return emitOpError("expected parent op with LinalgOp interface");
}
//===----------------------------------------------------------------------===//
// IndexOp
//===----------------------------------------------------------------------===//
LogicalResult IndexOp::verify() {
auto linalgOp = dyn_cast<LinalgOp>((*this)->getParentOp());
if (!linalgOp)
return emitOpError("expected parent op with LinalgOp interface");
if (linalgOp.getNumLoops() <= getDim())
return emitOpError("expected dim (")
<< getDim() << ") to be lower than the number of loops ("
<< linalgOp.getNumLoops() << ") of the enclosing LinalgOp";
return success();
}
/////// Operations corresponding to library calls defined with Tablegen ////////
#include "mlir/Dialect/Linalg/IR/LinalgNamedStructuredOps.yamlgen.cpp.inc"
#define GET_OP_CLASSES
#include "mlir/Dialect/Linalg/IR/LinalgOps.cpp.inc"
#define GET_OP_CLASSES
#include "mlir/Dialect/Linalg/IR/LinalgStructuredOps.cpp.inc"
/// Return the dims that are `iteratorTypeName` loops in the LinalgOp `op`.
/// Assumes `op` is a LinalgOp.
void mlir::linalg::getDimsOfType(Operation *op, StringRef iteratorTypeName,
SmallVectorImpl<unsigned> &res) {
if (!cast<LinalgOp>(op).iterator_types())
return;
unsigned dim = 0;
for (auto tn :
cast<LinalgOp>(op).iterator_types().getAsValueRange<StringAttr>()) {
if (tn == iteratorTypeName)
res.push_back(dim);
++dim;
}
}
AffineMap mlir::linalg::extractOrIdentityMap(Optional<AffineMap> maybeMap,
unsigned rank,
MLIRContext *context) {
if (maybeMap)
return *maybeMap;
if (rank == 0)
return AffineMap::get(context);
return AffineMap::getMultiDimIdentityMap(rank, context);
}
SmallVector<AffineExpr, 4>
mlir::linalg::makeAffineDimExprs(unsigned num, unsigned &startIdx,
MLIRContext *context) {
SmallVector<AffineExpr, 4> res;
res.reserve(num);
for (unsigned i = 0; i < num; ++i)
res.push_back(getAffineDimExpr(startIdx++, context));
return res;
}
SmallVector<AffineExpr, 4> mlir::linalg::concat(ArrayRef<AffineExpr> a,
ArrayRef<AffineExpr> b) {
auto rangeA = llvm::make_range(a.begin(), a.end());
auto rangeB = llvm::make_range(b.begin(), b.end());
auto concatRanges = llvm::concat<const AffineExpr>(rangeA, rangeB);
return llvm::to_vector<4>(concatRanges);
}
static void appendMangledType(llvm::raw_string_ostream &ss, Type t) {
if (auto memref = t.dyn_cast<MemRefType>()) {
ss << "view";
for (auto size : memref.getShape())
if (size < 0)
ss << "sx";
else
ss << size << "x";
appendMangledType(ss, memref.getElementType());
} else if (auto vec = t.dyn_cast<VectorType>()) {
ss << "vector";
llvm::interleave(
vec.getShape(), [&](int64_t i) { ss << i; }, [&]() { ss << "x"; });
appendMangledType(ss, vec.getElementType());
} else if (t.isSignlessIntOrIndexOrFloat()) {
ss << t;
} else {
llvm_unreachable("Invalid type for linalg library name mangling");
}
}
std::string mlir::linalg::generateLibraryCallName(Operation *op) {
assert(isa<LinalgOp>(op));
std::string name(op->getName().getStringRef().str());
name.reserve(128);
std::replace(name.begin(), name.end(), '.', '_');
llvm::raw_string_ostream ss(name);
ss << "_";
auto types = op->getOperandTypes();
llvm::interleave(
types.begin(), types.end(), [&](Type t) { appendMangledType(ss, t); },
[&]() { ss << "_"; });
return ss.str();
}
//===----------------------------------------------------------------------===//
// Canonicalizers and Folders.
//===----------------------------------------------------------------------===//
namespace {
struct EraseDeadLinalgOp : public OpInterfaceRewritePattern<LinalgOp> {
using OpInterfaceRewritePattern<LinalgOp>::OpInterfaceRewritePattern;
LogicalResult matchAndRewrite(LinalgOp op,
PatternRewriter &rewriter) const override {
for (OpOperand *opOperand : op.getInputAndOutputOperands()) {
// Linalg "inputs" may be either tensor or memref type.
// tensor<0xelt_type> is a convention that may not always mean
// "0 iterations". Only erase in cases we see memref<...x0x...>.
auto mt = opOperand->get().getType().dyn_cast<MemRefType>();
if (!mt)
continue;
if (llvm::is_contained(op.getShape(opOperand), 0)) {
rewriter.eraseOp(op);
return success();
}
}
return failure();
}
};
struct FoldTensorCastProducerOp : public OpInterfaceRewritePattern<LinalgOp> {
using OpInterfaceRewritePattern<LinalgOp>::OpInterfaceRewritePattern;
LogicalResult matchAndRewrite(LinalgOp op,
PatternRewriter &rewriter) const override {
// If no operand comes from a tensor::CastOp and can be folded then fail.
bool hasTensorCastOperand =
llvm::any_of(op.getInputAndOutputOperands(), [&](OpOperand *opOperand) {
if (opOperand->get().isa<BlockArgument>())
return false;
auto castOp = opOperand->get().getDefiningOp<tensor::CastOp>();
return castOp && canFoldIntoConsumerOp(castOp);
});
if (!hasTensorCastOperand)
return failure();
SmallVector<Type, 4> newResultTypes;
newResultTypes.reserve(op->getNumResults());
SmallVector<Value, 4> newOperands;
newOperands.reserve(op->getNumOperands());
// Inputs may fold.
for (OpOperand *opOperand : op.getInputOperands()) {
auto tensorCastOp = opOperand->get().getDefiningOp<tensor::CastOp>();
newOperands.push_back(canFoldIntoConsumerOp(tensorCastOp)
? tensorCastOp.getSource()
: opOperand->get());
}
// Init tensors may fold, in which case the resultType must also change.
for (OpOperand *opOperand : op.getOutputOperands()) {
auto tensorCastOp = opOperand->get().getDefiningOp<tensor::CastOp>();
bool fold = canFoldIntoConsumerOp(tensorCastOp);
newOperands.push_back(fold ? tensorCastOp.getOperand()
: opOperand->get());
newResultTypes.push_back(newOperands.back().getType());
}
// Clone op.
Operation *newOp =
op.clone(rewriter, op->getLoc(), newResultTypes, newOperands);
SmallVector<Value, 4> replacements;
replacements.reserve(newOp->getNumResults());
for (auto result : llvm::zip(op->getResults(), newOp->getResults())) {
Value oldResult = std::get<0>(result);
Value newResult = std::get<1>(result);
if (newResult.getType() != oldResult.getType()) {
replacements.push_back(rewriter.create<tensor::CastOp>(
op->getLoc(), oldResult.getType(), newResult));
} else {
replacements.push_back(newResult);
}
}
rewriter.replaceOp(op, replacements);
return success();
}
};
/// Fold LinalgOps with `tensor.cast` consumer if the `tensor.cast` has
/// result that is more static than the linalg op.
struct FoldTensorCastConsumerOp : public OpRewritePattern<tensor::CastOp> {
using OpRewritePattern<tensor::CastOp>::OpRewritePattern;
LogicalResult matchAndRewrite(tensor::CastOp castOp,
PatternRewriter &rewriter) const override {
if (!tensor::canFoldIntoProducerOp(castOp))
return failure();
auto linalgOp = castOp.getSource().getDefiningOp<LinalgOp>();
if (!linalgOp)
return failure();
// Cast can be in conditionally reachable region, if which case folding will
// generate invalid code. Only conservatively fold ops in same block for
// now.
if (castOp->getBlock() != linalgOp->getBlock())
return failure();
OpBuilder::InsertionGuard guard(rewriter);
rewriter.setInsertionPoint(linalgOp);
Location loc = linalgOp.getLoc();
OpResult resultValue = castOp.getSource().cast<OpResult>();
unsigned resultNumber = resultValue.getResultNumber();
auto resultType = castOp->getResult(0).getType().cast<RankedTensorType>();
// Replace the `outs` for the result with a `tensor.cast`. This cast is now
// going from a more dynamic shape to a less dynamic shape. If the producer
// for this cast, i.e. producer of the out operand, is also an operation
// that folds with tensor.cast consumer (like this pattern), the cast will
// continue to propagate as far up the stack as it can go.
OpOperand *outOperand = linalgOp.getOutputOperand(resultNumber);
Value newOperand =
rewriter.create<tensor::CastOp>(loc, resultType, outOperand->get());
SmallVector<Value> newOperands = linalgOp.getInputOperands();
SmallVector<Value> outputOperands = linalgOp.getOutputOperands();
outputOperands[resultNumber] = newOperand;
newOperands.append(outputOperands.begin(), outputOperands.end());
SmallVector<Type> resultTypes(linalgOp->result_type_begin(),
linalgOp->result_type_end());
resultTypes[resultNumber] = resultType;
Operation *newOp = linalgOp.clone(rewriter, loc, resultTypes, newOperands);
// Create a tensor.cast operation back to the original type.
Value castBack = rewriter.create<tensor::CastOp>(
loc, resultValue.getType(), newOp->getResult(resultNumber));
SmallVector<Value> results(newOp->result_begin(), newOp->result_end());
results[resultNumber] = castBack;
rewriter.replaceOp(linalgOp, results);
rewriter.replaceOp(castOp, newOp->getResult(resultNumber));
return success();
}
};
/// For each of the operand in `operands` this function maps the static sizes of
/// dimensions to their affine dim expressions.
static void populateMap(LinalgOp linalgOp, ArrayRef<OpOperand *> operands,
llvm::DenseMap<AffineExpr, int64_t> &affineExprToSize) {
for (OpOperand *opOperand : operands) {
if (linalgOp.isScalar(opOperand))
continue;
Value src = opOperand->get();
auto sourceType = src.getType().cast<RankedTensorType>();
auto sourceMap = linalgOp.getTiedIndexingMap(opOperand);
// Get the `sourceShape` of the `sourceType`. If the operand is a result of
// `tensor.cast` operation and source of the cast operation has a static
// shape, then assign it to the `sourceShape`.
auto *parentOp = src.getDefiningOp();
ArrayRef<int64_t> sourceShape = sourceType.getShape();
if (parentOp) {
if (auto castOp = dyn_cast<tensor::CastOp>(parentOp)) {
Value castSource = castOp.getSource();
auto castSourceType = castSource.getType().cast<RankedTensorType>();
if (castSourceType.hasStaticShape())
sourceShape = castSourceType.getShape();
}
}
// If the source shape's dimension has a static shape, map the affine dim
// expression to the known static size.
for (unsigned i = 0; i < sourceShape.size(); i++) {
if (sourceType.isDynamicDim(i))
continue;
if (auto affineDimExpr = sourceMap.getResult(i).dyn_cast<AffineDimExpr>())
affineExprToSize.try_emplace(affineDimExpr, sourceShape[i]);
}
}
}
/// Creates new operand w.r.t 'opOperand' of `linalgOp` with static sizes
/// mapped in `affineExprToSize`. New operands are created in `newOperands` and
/// their result types is stored in `resultTypes`. If `opOperand` requires no
/// change then `changeNeeded` is false and same operand is added in the
/// `newOperands` list.
static void createNewOperandWithStaticSizes(
Location loc, PatternRewriter &rewriter, OpOperand *opOperand,
llvm::DenseMap<AffineExpr, int64_t> &affineExprToSize, LinalgOp linalgOp,
SmallVector<Value> &newOperands, SmallVector<Type> &resultTypes,
bool &changeNeeded) {
Value src = opOperand->get();
newOperands.push_back(src);
if (linalgOp.isScalar(opOperand))
return;
auto sourceType = src.getType().cast<RankedTensorType>();
Type resultType = sourceType;
if (sourceType.hasStaticShape() && linalgOp.isOutputTensor(opOperand)) {
resultTypes.push_back(resultType);
return;
}
ArrayRef<int64_t> sourceShape = sourceType.getShape();
AffineMap sourceMap = linalgOp.getTiedIndexingMap(opOperand);
SmallVector<int64_t> newShape;
// If operand is updated with new shape, `newOperandNeeded` will be
// true.
bool newOperandNeeded = false;
for (unsigned i = 0; i < sourceShape.size(); i++) {
int64_t dimShape = sourceShape[i];
AffineExpr dimExpr = sourceMap.getResult(i);
if (affineExprToSize.find(dimExpr) == affineExprToSize.end() ||
!sourceType.isDynamicDim(i)) {
newShape.push_back(dimShape);
continue;
}
// Dimension has a dynamic shape and corresponding affine dim
// expression is present in the map. So assign the size for the
// given affine dim expression to the dimension.
newShape.push_back(affineExprToSize[dimExpr]);
newOperandNeeded = true;
}
resultType = RankedTensorType::get(newShape, sourceType.getElementType());
if (newOperandNeeded) {
changeNeeded = true;
// Get the new operand value given its size and element type by
// casting it.
Value newOperand = rewriter.create<tensor::CastOp>(loc, resultType, src);
unsigned index = opOperand->getOperandNumber();
newOperands[index] = newOperand;
}
if (linalgOp.isOutputTensor(opOperand))
resultTypes.push_back(resultType);
}
/// Static shapes for the operands can be inferred if any one of the operands
/// have a static shape. This can be done by referring to the affine dim
/// expressions for the operand.
struct InferStaticShapeOfOperands : public OpInterfaceRewritePattern<LinalgOp> {
using OpInterfaceRewritePattern<LinalgOp>::OpInterfaceRewritePattern;
LogicalResult matchAndRewrite(LinalgOp linalgOp,
PatternRewriter &rewriter) const override {
if (!linalgOp.hasTensorSemantics())
return failure();
// Maps must be projected permutations.
if (llvm::any_of(linalgOp.getIndexingMapsArray(), [](AffineMap map) {
return !map.isProjectedPermutation();
}))
return failure();
// Maps affine dim expressions to the static size of that dimension.
llvm::DenseMap<AffineExpr, int64_t> affineExprToSize;
Location loc = linalgOp.getLoc();
// For each of the affine dim expression, check if the size is known. If
// known add that in the map.
populateMap(linalgOp, linalgOp.getInputAndOutputOperands(),
affineExprToSize);
SmallVector<Value> newOperands;
SmallVector<Type> resultTypes;
// `changeNeeded` is `false` if the operands of `linalgOp` require no
// change in their types.
bool changeNeeded = false;
newOperands.reserve(linalgOp.getNumInputsAndOutputs());
resultTypes.reserve(linalgOp.getNumOutputs());
// Iterate over all the operands and update the static sizes.
for (OpOperand *opOperand : linalgOp.getInputAndOutputOperands()) {
createNewOperandWithStaticSizes(loc, rewriter, opOperand,
affineExprToSize, linalgOp, newOperands,
resultTypes, changeNeeded);
}
// If the generic op has all the required static information, no
// canonicalization needed.
if (!changeNeeded)
return failure();
// Clone op.
Operation *newOp =
linalgOp.clone(rewriter, linalgOp->getLoc(), resultTypes, newOperands);
SmallVector<Value> replacements;
replacements.reserve(newOp->getNumResults());
for (auto it : llvm::zip(linalgOp->getResults(), newOp->getResults())) {
Value newResult = std::get<1>(it);
Value oldResult = std::get<0>(it);
Type newType = newResult.getType();
Type oldType = oldResult.getType();
replacements.push_back(
(newType != oldType)
? rewriter.create<tensor::CastOp>(loc, oldType, newResult)
: newResult);
}
rewriter.replaceOp(linalgOp, replacements);
return success();
}
};
} // namespace
// All named ops canonicalizers and folders are auto-generated in the
// .cpp.inc.
//===----------------------------------------------------------------------===//
// LinalgDialect
//===----------------------------------------------------------------------===//
void LinalgDialect::getCanonicalizationPatterns(
RewritePatternSet &results) const {
results.add<EraseDeadLinalgOp, FoldTensorCastConsumerOp,
FoldTensorCastProducerOp, InferStaticShapeOfOperands>(
getContext());
}
Operation *LinalgDialect::materializeConstant(OpBuilder &builder,
Attribute value, Type type,
Location loc) {
return builder.create<arith::ConstantOp>(loc, type, value);
}
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