| 1 | //===- AlgebraicSimplification.cpp - Simplify algebraic expressions -------===// |
|---|---|
| 2 | // |
| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| 4 | // See https://llvm.org/LICENSE.txt for license information. |
| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| 6 | // |
| 7 | //===----------------------------------------------------------------------===// |
| 8 | // This file defines a pass that applies algebraic simplifications |
| 9 | // to operations of Math/Complex/etc. dialects that are used by Flang. |
| 10 | // It is done as a Flang specific pass, because we may want to tune |
| 11 | // the parameters of the patterns for Fortran programs. |
| 12 | //===----------------------------------------------------------------------===// |
| 13 | |
| 14 | #include "flang/Optimizer/Transforms/Passes.h" |
| 15 | #include "mlir/Dialect/Math/IR/Math.h" |
| 16 | #include "mlir/Dialect/Math/Transforms/Passes.h" |
| 17 | #include "mlir/Transforms/GreedyPatternRewriteDriver.h" |
| 18 | |
| 19 | namespace fir { |
| 20 | #define GEN_PASS_DEF_ALGEBRAICSIMPLIFICATION |
| 21 | #include "flang/Optimizer/Transforms/Passes.h.inc" |
| 22 | } // namespace fir |
| 23 | |
| 24 | using namespace mlir; |
| 25 | |
| 26 | namespace { |
| 27 | struct AlgebraicSimplification |
| 28 | : public fir::impl::AlgebraicSimplificationBase<AlgebraicSimplification> { |
| 29 | AlgebraicSimplification(const GreedyRewriteConfig &rewriteConfig) { |
| 30 | config = rewriteConfig; |
| 31 | } |
| 32 | |
| 33 | void runOnOperation() override; |
| 34 | |
| 35 | mlir::GreedyRewriteConfig config; |
| 36 | }; |
| 37 | } // namespace |
| 38 | |
| 39 | void AlgebraicSimplification::runOnOperation() { |
| 40 | RewritePatternSet patterns(&getContext()); |
| 41 | populateMathAlgebraicSimplificationPatterns(patterns); |
| 42 | (void)applyPatternsAndFoldGreedily(getOperation(), std::move(patterns), |
| 43 | config); |
| 44 | } |
| 45 | |
| 46 | std::unique_ptr<mlir::Pass> fir::createAlgebraicSimplificationPass() { |
| 47 | return std::make_unique<AlgebraicSimplification>(args: GreedyRewriteConfig()); |
| 48 | } |
| 49 | |
| 50 | std::unique_ptr<mlir::Pass> fir::createAlgebraicSimplificationPass( |
| 51 | const mlir::GreedyRewriteConfig &config) { |
| 52 | return std::make_unique<AlgebraicSimplification>(args: config); |
| 53 | } |
| 54 |