| //===-- RemoveShapeConstraints.cpp - Remove Shape Cstr and Assuming 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 |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "PassDetail.h" |
| #include "mlir/Dialect/Shape/IR/Shape.h" |
| #include "mlir/Dialect/Shape/Transforms/Passes.h" |
| #include "mlir/Transforms/DialectConversion.h" |
| #include "mlir/Transforms/GreedyPatternRewriteDriver.h" |
| |
| using namespace mlir; |
| |
| namespace { |
| /// Removal patterns. |
| class RemoveCstrBroadcastableOp |
| : public OpRewritePattern<shape::CstrBroadcastableOp> { |
| public: |
| using OpRewritePattern::OpRewritePattern; |
| |
| LogicalResult matchAndRewrite(shape::CstrBroadcastableOp op, |
| PatternRewriter &rewriter) const override { |
| rewriter.replaceOpWithNewOp<shape::ConstWitnessOp>(op.getOperation(), true); |
| return success(); |
| } |
| }; |
| |
| class RemoveCstrEqOp : public OpRewritePattern<shape::CstrEqOp> { |
| public: |
| using OpRewritePattern::OpRewritePattern; |
| |
| LogicalResult matchAndRewrite(shape::CstrEqOp op, |
| PatternRewriter &rewriter) const override { |
| rewriter.replaceOpWithNewOp<shape::ConstWitnessOp>(op.getOperation(), true); |
| return success(); |
| } |
| }; |
| |
| /// Removal pass. |
| class RemoveShapeConstraintsPass |
| : public RemoveShapeConstraintsBase<RemoveShapeConstraintsPass> { |
| |
| void runOnFunction() override { |
| MLIRContext &ctx = getContext(); |
| |
| RewritePatternSet patterns(&ctx); |
| populateRemoveShapeConstraintsPatterns(patterns); |
| |
| (void)applyPatternsAndFoldGreedily(getFunction(), std::move(patterns)); |
| } |
| }; |
| |
| } // namespace |
| |
| void mlir::populateRemoveShapeConstraintsPatterns(RewritePatternSet &patterns) { |
| patterns.add<RemoveCstrBroadcastableOp, RemoveCstrEqOp>( |
| patterns.getContext()); |
| } |
| |
| std::unique_ptr<FunctionPass> mlir::createRemoveShapeConstraintsPass() { |
| return std::make_unique<RemoveShapeConstraintsPass>(); |
| } |