3713314bfa
Add a new pass to lower operations from the `shape` to the `std` dialect. The conversion applies only to the `size_to_index` and `index_to_size` operations and affected types. Other patterns will be added as needed. Differential Revision: https://reviews.llvm.org/D81091
107 lines
3.3 KiB
C++
107 lines
3.3 KiB
C++
//===- LinalgToStandard.cpp - conversion from Linalg to Standard dialect --===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "mlir/Conversion/ShapeToStandard/ShapeToStandard.h"
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#include "../PassDetail.h"
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#include "mlir/Dialect/SCF/SCF.h"
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#include "mlir/Dialect/Shape/IR/Shape.h"
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#include "mlir/Dialect/StandardOps/IR/Ops.h"
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#include "mlir/Transforms/DialectConversion.h"
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namespace mlir {
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namespace {
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/// Conversion patterns.
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class SizeToIndexOpConversion
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: public OpConversionPattern<shape::SizeToIndexOp> {
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public:
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using OpConversionPattern<shape::SizeToIndexOp>::OpConversionPattern;
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LogicalResult
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matchAndRewrite(shape::SizeToIndexOp op, ArrayRef<Value> operands,
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ConversionPatternRewriter &rewriter) const override {
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shape::SizeToIndexOpOperandAdaptor transformed(operands);
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rewriter.replaceOp(op.getOperation(), transformed.arg());
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return success();
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}
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};
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class IndexToSizeOpConversion
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: public OpConversionPattern<shape::IndexToSizeOp> {
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public:
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using OpConversionPattern<shape::IndexToSizeOp>::OpConversionPattern;
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LogicalResult
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matchAndRewrite(shape::IndexToSizeOp op, ArrayRef<Value> operands,
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ConversionPatternRewriter &rewriter) const override {
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shape::IndexToSizeOpOperandAdaptor transformed(operands);
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rewriter.replaceOp(op.getOperation(), transformed.arg());
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return success();
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}
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};
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/// Type conversions.
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class ShapeTypeConverter : public TypeConverter {
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public:
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using TypeConverter::convertType;
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ShapeTypeConverter(MLIRContext *ctx) {
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// Add default pass-through conversion.
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addConversion([&](Type type) { return type; });
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addConversion([ctx](shape::SizeType type) { return IndexType::get(ctx); });
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}
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};
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/// Conversion pass.
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class ConvertShapeToStandardPass
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: public ConvertShapeToStandardBase<ConvertShapeToStandardPass> {
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void runOnOperation() override {
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// Setup type conversion.
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MLIRContext &ctx = getContext();
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ShapeTypeConverter typeConverter(&ctx);
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// Setup target legality.
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ConversionTarget target(ctx);
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target.addLegalDialect<scf::SCFDialect, StandardOpsDialect>();
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target.addLegalOp<ModuleOp, ModuleTerminatorOp, ReturnOp>();
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target.addDynamicallyLegalOp<FuncOp>([&](FuncOp op) {
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return typeConverter.isSignatureLegal(op.getType());
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});
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// Setup conversion patterns.
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OwningRewritePatternList patterns;
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populateShapeToStandardConversionPatterns(patterns, &ctx);
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populateFuncOpTypeConversionPattern(patterns, &ctx, typeConverter);
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// Apply conversion.
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auto module = getOperation();
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if (failed(applyFullConversion(module, target, patterns, &typeConverter)))
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signalPassFailure();
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}
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};
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} // namespace
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void populateShapeToStandardConversionPatterns(
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OwningRewritePatternList &patterns, MLIRContext *ctx) {
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// clang-format off
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patterns.insert<
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IndexToSizeOpConversion,
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SizeToIndexOpConversion>(ctx);
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// clang-format on
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}
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std::unique_ptr<OperationPass<ModuleOp>> createConvertShapeToStandardPass() {
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return std::make_unique<ConvertShapeToStandardPass>();
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}
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} // namespace mlir
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