| //===- Bufferize.cpp - Bufferization for std ops --------------------------===// |
| // |
| // 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 bufferization of std ops. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "mlir/Dialect/Bufferization/Transforms/Bufferize.h" |
| #include "PassDetail.h" |
| #include "mlir/Dialect/Bufferization/IR/Bufferization.h" |
| #include "mlir/Dialect/MemRef/IR/MemRef.h" |
| #include "mlir/Dialect/SCF/SCF.h" |
| #include "mlir/Dialect/StandardOps/IR/Ops.h" |
| #include "mlir/Dialect/StandardOps/Transforms/Passes.h" |
| #include "mlir/Dialect/Tensor/IR/Tensor.h" |
| #include "mlir/IR/BlockAndValueMapping.h" |
| #include "mlir/Transforms/DialectConversion.h" |
| |
| using namespace mlir; |
| |
| namespace { |
| class BufferizeSelectOp : public OpConversionPattern<SelectOp> { |
| public: |
| using OpConversionPattern::OpConversionPattern; |
| LogicalResult |
| matchAndRewrite(SelectOp op, OpAdaptor adaptor, |
| ConversionPatternRewriter &rewriter) const override { |
| if (!op.getCondition().getType().isa<IntegerType>()) |
| return rewriter.notifyMatchFailure(op, "requires scalar condition"); |
| |
| rewriter.replaceOpWithNewOp<SelectOp>(op, adaptor.getCondition(), |
| adaptor.getTrueValue(), |
| adaptor.getFalseValue()); |
| return success(); |
| } |
| }; |
| } // namespace |
| |
| void mlir::populateStdBufferizePatterns( |
| bufferization::BufferizeTypeConverter &typeConverter, |
| RewritePatternSet &patterns) { |
| patterns.add<BufferizeSelectOp>(typeConverter, patterns.getContext()); |
| } |
| |
| namespace { |
| struct StdBufferizePass : public StdBufferizeBase<StdBufferizePass> { |
| void runOnFunction() override { |
| auto *context = &getContext(); |
| bufferization::BufferizeTypeConverter typeConverter; |
| RewritePatternSet patterns(context); |
| ConversionTarget target(*context); |
| |
| target.addLegalDialect<scf::SCFDialect, StandardOpsDialect, |
| memref::MemRefDialect>(); |
| |
| populateStdBufferizePatterns(typeConverter, patterns); |
| // We only bufferize the case of tensor selected type and scalar condition, |
| // as that boils down to a select over memref descriptors (don't need to |
| // touch the data). |
| target.addDynamicallyLegalOp<SelectOp>([&](SelectOp op) { |
| return typeConverter.isLegal(op.getType()) || |
| !op.getCondition().getType().isa<IntegerType>(); |
| }); |
| if (failed( |
| applyPartialConversion(getFunction(), target, std::move(patterns)))) |
| signalPassFailure(); |
| } |
| }; |
| } // namespace |
| |
| std::unique_ptr<Pass> mlir::createStdBufferizePass() { |
| return std::make_unique<StdBufferizePass>(); |
| } |