forked from OSchip/llvm-project
46 lines
1.6 KiB
C++
46 lines
1.6 KiB
C++
//===- Canonicalizer.cpp - Canonicalize MLIR operations -------------------===//
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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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//
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// This transformation pass converts operations into their canonical forms by
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// folding constants, applying operation identity transformations etc.
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//
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//===----------------------------------------------------------------------===//
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#include "PassDetail.h"
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#include "mlir/Dialect/MemRef/IR/MemRef.h"
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#include "mlir/Pass/Pass.h"
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#include "mlir/Transforms/GreedyPatternRewriteDriver.h"
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#include "mlir/Transforms/Passes.h"
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using namespace mlir;
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namespace {
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/// Canonicalize operations in nested regions.
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struct Canonicalizer : public CanonicalizerBase<Canonicalizer> {
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/// Initialize the canonicalizer by building the set of patterns used during
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/// execution.
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LogicalResult initialize(MLIRContext *context) override {
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RewritePatternSet owningPatterns(context);
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for (auto *op : context->getRegisteredOperations())
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op->getCanonicalizationPatterns(owningPatterns, context);
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patterns = std::move(owningPatterns);
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return success();
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}
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void runOnOperation() override {
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(void)applyPatternsAndFoldGreedily(getOperation()->getRegions(), patterns);
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}
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FrozenRewritePatternSet patterns;
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};
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} // end anonymous namespace
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/// Create a Canonicalizer pass.
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std::unique_ptr<Pass> mlir::createCanonicalizerPass() {
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return std::make_unique<Canonicalizer>();
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}
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