9c0acc42e8
Try 2 to merge 4fbd1d6c87.
Flang algebraic simplification pass will run algebraic simplification
rewrite patterns for Math/Complex/etc. dialects. It is enabled
under opt-for-speed optimization levels (i.e. for O1/O2/O3; Os/Oz will not
enable it).
With this change the FIR/MLIR optimization pipeline becomes affected
by the -O* optimization level switches. Until now these switches
only affected the middle-end and back-end.
Differential Revision: https://reviews.llvm.org/D130035
38 lines
1.4 KiB
C++
38 lines
1.4 KiB
C++
//===- AlgebraicSimplification.cpp - Simplify algebraic expressions -------===//
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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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// This file defines a pass that applies algebraic simplifications
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// to operations of Math/Complex/etc. dialects that are used by Flang.
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// It is done as a Flang specific pass, because we may want to tune
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// the parameters of the patterns for Fortran programs.
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//===----------------------------------------------------------------------===//
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#include "PassDetail.h"
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#include "flang/Optimizer/Transforms/Passes.h"
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#include "mlir/Dialect/Math/Transforms/Passes.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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struct AlgebraicSimplification
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: public fir::AlgebraicSimplificationBase<AlgebraicSimplification> {
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void runOnOperation() override;
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};
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} // namespace
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void AlgebraicSimplification::runOnOperation() {
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RewritePatternSet patterns(&getContext());
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populateMathAlgebraicSimplificationPatterns(patterns);
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(void)applyPatternsAndFoldGreedily(getOperation(), std::move(patterns));
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}
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std::unique_ptr<mlir::Pass> fir::createAlgebraicSimplificationPass() {
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return std::make_unique<AlgebraicSimplification>();
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}
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