| 1 | //===- TopologicalSort.cpp - Topological sort 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 | #include "mlir/Transforms/Passes.h" |
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| 10 | |
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| 11 | #include "mlir/IR/RegionKindInterface.h" |
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| 12 | #include "mlir/Transforms/TopologicalSortUtils.h" |
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| 13 | |
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| 14 | namespace mlir { |
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| 15 | #define GEN_PASS_DEF_TOPOLOGICALSORT |
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| 16 | #include "mlir/Transforms/Passes.h.inc" |
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| 17 | } // namespace mlir |
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| 18 | |
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| 19 | using namespace mlir; |
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| 20 | |
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| 21 | namespace { |
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| 22 | struct TopologicalSortPass |
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| 23 | : public impl::TopologicalSortBase<TopologicalSortPass> { |
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| 24 | void runOnOperation() override { |
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| 25 | // Topologically sort the regions of the operation without SSA dominance. |
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| 26 | getOperation()->walk([](RegionKindInterface op) { |
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| 27 | for (auto it : llvm::enumerate(op->getRegions())) { |
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| 28 | if (op.hasSSADominance(it.index())) |
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| 29 | continue; |
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| 30 | for (Block &block : it.value()) |
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| 31 | sortTopologically(&block); |
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| 32 | } |
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| 33 | }); |
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| 34 | } |
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| 35 | }; |
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| 36 | } // end anonymous namespace |
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| 37 | |
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| 38 | std::unique_ptr<Pass> mlir::createTopologicalSortPass() { |
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| 39 | return std::make_unique<TopologicalSortPass>(); |
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| 40 | } |
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| 41 | |
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