| 1 | //===- AffineLoopNormalize.cpp - AffineLoopNormalize Pass -----------------===// |
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| 2 | // |
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| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 4 | // See https://llvm.org/LICENSE.txt for license information. |
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| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 6 | // |
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| 7 | //===----------------------------------------------------------------------===// |
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| 8 | // |
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| 9 | // This file implements a normalizer for affine loop-like ops. |
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| 10 | // |
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| 11 | //===----------------------------------------------------------------------===// |
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| 12 | |
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| 13 | #include "mlir/Dialect/Affine/Passes.h" |
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| 14 | |
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| 15 | #include "mlir/Dialect/Affine/IR/AffineOps.h" |
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| 16 | #include "mlir/Dialect/Affine/Utils.h" |
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| 17 | #include "mlir/Dialect/Func/IR/FuncOps.h" |
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| 18 | |
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| 19 | namespace mlir { |
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| 20 | namespace affine { |
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| 21 | #define GEN_PASS_DEF_AFFINELOOPNORMALIZE |
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| 22 | #include "mlir/Dialect/Affine/Passes.h.inc" |
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| 23 | } // namespace affine |
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| 24 | } // namespace mlir |
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| 25 | |
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| 26 | using namespace mlir; |
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| 27 | using namespace mlir::affine; |
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| 28 | |
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| 29 | namespace { |
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| 30 | |
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| 31 | /// Normalize affine.parallel ops so that lower bounds are 0 and steps are 1. |
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| 32 | /// As currently implemented, this pass cannot fail, but it might skip over ops |
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| 33 | /// that are already in a normalized form. |
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| 34 | struct AffineLoopNormalizePass |
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| 35 | : public affine::impl::AffineLoopNormalizeBase<AffineLoopNormalizePass> { |
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| 36 | explicit AffineLoopNormalizePass(bool promoteSingleIter) { |
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| 37 | this->promoteSingleIter = promoteSingleIter; |
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| 38 | } |
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| 39 | |
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| 40 | void runOnOperation() override { |
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| 41 | getOperation().walk([&](Operation *op) { |
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| 42 | if (auto affineParallel = dyn_cast<AffineParallelOp>(op)) |
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| 43 | normalizeAffineParallel(affineParallel); |
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| 44 | else if (auto affineFor = dyn_cast<AffineForOp>(op)) |
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| 45 | (void)normalizeAffineFor(affineFor, promoteSingleIter); |
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| 46 | }); |
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| 47 | } |
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| 48 | }; |
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| 49 | |
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| 50 | } // namespace |
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| 51 | |
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| 52 | std::unique_ptr<OperationPass<func::FuncOp>> |
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| 53 | mlir::affine::createAffineLoopNormalizePass(bool promoteSingleIter) { |
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| 54 | return std::make_unique<AffineLoopNormalizePass>(args&: promoteSingleIter); |
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| 55 | } |
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| 56 | |
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