llvm/mlir/lib/Conversion/TosaToTensor/TosaToTensor.cpp

//===- TosaToTensor.cpp - Lowering Tosa to Tensor Dialect -------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
//
// These rewriters lower from the Tosa to the Tensor dialect.
//
//===----------------------------------------------------------------------===//

#include "mlir/Conversion/TosaToTensor/TosaToTensor.h"
#include "mlir/Dialect/Arith/IR/Arith.h"
#include "mlir/Dialect/Arith/Utils/Utils.h"
#include "mlir/Dialect/Tensor/IR/Tensor.h"
#include "mlir/Dialect/Tensor/Utils/Utils.h"
#include "mlir/Dialect/Tosa/IR/TosaOps.h"
#include "mlir/IR/PatternMatch.h"
#include "mlir/Transforms/DialectConversion.h"

#include <numeric>

usingnamespacemlir;
usingnamespacetosa;

namespace {

// Infer the type to which the input of a 'tosa.reshape' op must be cast when
// lowered.
TensorType inferReshapeInputType(TypedValue<TensorType> input,
                                 ArrayRef<int64_t> newShape) { … }

// Infer the result type of 'tensor.expand_shape' in the collapse-expand
// pair emitted for a 'tosa.reshape' op.
TensorType inferReshapeExpandedType(TensorType inputType,
                                    ArrayRef<int64_t> newShape) { … }

// Infer the result type of 'tensor.collapse_shape' in the collapse-expand
// pair emitted for a 'tosa.reshape' op.
TensorType inferReshapeCollapsedType(TensorType lhsType, TensorType rhsType) { … }

SmallVector<ReassociationExprs>
createReassociationMapForCollapse(OpBuilder &builder, Type srcType, Type dstType) { … }

// Create a tensor.collapse_shape op that reshapes the input into the given
// result type.
Value createCollapse(OpBuilder &builder, Location loc, TensorType resultType,
                     Value input) { … }

// Create a tensor.expand_shape op that reshapes the input into the given result
// type.
Value createExpand(OpBuilder &builder, Location loc, TensorType resultType,
                   Value input) { … }

class ReshapeConverter : public OpConversionPattern<tosa::ReshapeOp> { … };

class SliceConverter : public OpConversionPattern<tosa::SliceOp> { … };

class PadConverter : public OpConversionPattern<tosa::PadOp> { … };

struct ConcatConverter : public OpConversionPattern<tosa::ConcatOp> { … };

} // namespace

void mlir::tosa::populateTosaToTensorConversionPatterns(
    TypeConverter &converter, RewritePatternSet *patterns) { … }