| //===- Canonicalizer.cpp - Canonicalize MLIR operations -------------------===// |
| // |
| // Copyright 2019 The MLIR Authors. |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| // ============================================================================= |
| // |
| // This transformation pass converts operations into their canonical forms by |
| // folding constants, applying operation identity transformations etc. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "mlir/IR/MLIRContext.h" |
| #include "mlir/IR/PatternMatch.h" |
| #include "mlir/Pass/Pass.h" |
| #include "mlir/Transforms/Passes.h" |
| using namespace mlir; |
| |
| //===----------------------------------------------------------------------===// |
| // The actual Canonicalizer Pass. |
| //===----------------------------------------------------------------------===// |
| |
| namespace { |
| |
| /// Canonicalize operations in functions. |
| struct Canonicalizer : public FunctionPass<Canonicalizer> { |
| void runOnFunction() override; |
| }; |
| } // end anonymous namespace |
| |
| void Canonicalizer::runOnFunction() { |
| OwningRewritePatternList patterns; |
| auto func = getFunction(); |
| |
| // TODO: Instead of adding all known patterns from the whole system lazily add |
| // and cache the canonicalization patterns for ops we see in practice when |
| // building the worklist. For now, we just grab everything. |
| auto *context = &getContext(); |
| for (auto *op : context->getRegisteredOperations()) |
| op->getCanonicalizationPatterns(patterns, context); |
| |
| applyPatternsGreedily(func, std::move(patterns)); |
| } |
| |
| /// Create a Canonicalizer pass. |
| FunctionPassBase *mlir::createCanonicalizerPass() { |
| return new Canonicalizer(); |
| } |
| |
| static PassRegistration<Canonicalizer> pass("canonicalize", |
| "Canonicalize operations"); |