b6eb26fd0e
There are several pieces of pattern rewriting infra in IR/ that really shouldn't be there. This revision moves those pieces to a better location such that they are easier to evolve in the future(e.g. with PDL). More concretely this revision does the following: * Create a Transforms/GreedyPatternRewriteDriver.h and move the apply*andFold methods there. The definitions for these methods are already in Transforms/ so it doesn't make sense for the declarations to be in IR. * Create a new lib/Rewrite library and move PatternApplicator there. This new library will be focused on applying rewrites, and will also include compiling rewrites with PDL. Differential Revision: https://reviews.llvm.org/D89103
66 lines
2.0 KiB
C++
66 lines
2.0 KiB
C++
//===-- RemoveShapeConstraints.cpp - Remove Shape Cstr and Assuming Ops ---===//
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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 "PassDetail.h"
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#include "mlir/Dialect/Shape/IR/Shape.h"
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#include "mlir/Dialect/Shape/Transforms/Passes.h"
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#include "mlir/Transforms/DialectConversion.h"
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#include "mlir/Transforms/GreedyPatternRewriteDriver.h"
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using namespace mlir;
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namespace {
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/// Removal patterns.
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class RemoveCstrBroadcastableOp
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: public OpRewritePattern<shape::CstrBroadcastableOp> {
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public:
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using OpRewritePattern::OpRewritePattern;
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LogicalResult matchAndRewrite(shape::CstrBroadcastableOp op,
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PatternRewriter &rewriter) const override {
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rewriter.replaceOpWithNewOp<shape::ConstWitnessOp>(op.getOperation(), true);
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return success();
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}
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};
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class RemoveCstrEqOp : public OpRewritePattern<shape::CstrEqOp> {
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public:
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using OpRewritePattern::OpRewritePattern;
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LogicalResult matchAndRewrite(shape::CstrEqOp op,
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PatternRewriter &rewriter) const override {
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rewriter.replaceOpWithNewOp<shape::ConstWitnessOp>(op.getOperation(), true);
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return success();
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}
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};
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/// Removal pass.
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class RemoveShapeConstraintsPass
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: public RemoveShapeConstraintsBase<RemoveShapeConstraintsPass> {
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void runOnFunction() override {
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MLIRContext &ctx = getContext();
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OwningRewritePatternList patterns;
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populateRemoveShapeConstraintsPatterns(patterns, &ctx);
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applyPatternsAndFoldGreedily(getFunction(), patterns);
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}
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};
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} // namespace
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void mlir::populateRemoveShapeConstraintsPatterns(
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OwningRewritePatternList &patterns, MLIRContext *ctx) {
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patterns.insert<RemoveCstrBroadcastableOp, RemoveCstrEqOp>(ctx);
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}
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std::unique_ptr<FunctionPass> mlir::createRemoveShapeConstraintsPass() {
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return std::make_unique<RemoveShapeConstraintsPass>();
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}
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