| 1 | //===- TestTopologicalSort.cpp - Pass to test topological sort analysis ---===// |
|---|---|
| 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 | |
| 9 | #include "mlir/IR/Builders.h" |
| 10 | #include "mlir/IR/BuiltinOps.h" |
| 11 | #include "mlir/Pass/Pass.h" |
| 12 | #include "mlir/Transforms/TopologicalSortUtils.h" |
| 13 | |
| 14 | using namespace mlir; |
| 15 | |
| 16 | namespace { |
| 17 | struct TestTopologicalSortAnalysisPass |
| 18 | : public PassWrapper<TestTopologicalSortAnalysisPass, |
| 19 | OperationPass<ModuleOp>> { |
| 20 | MLIR_DEFINE_EXPLICIT_INTERNAL_INLINE_TYPE_ID(TestTopologicalSortAnalysisPass) |
| 21 | |
| 22 | StringRef getArgument() const final { |
| 23 | return "test-topological-sort-analysis"; |
| 24 | } |
| 25 | StringRef getDescription() const final { |
| 26 | return "Test topological sorting of ops"; |
| 27 | } |
| 28 | |
| 29 | void runOnOperation() override { |
| 30 | Operation *op = getOperation(); |
| 31 | OpBuilder builder(op->getContext()); |
| 32 | |
| 33 | WalkResult result = op->walk(callback: [&](Operation *root) { |
| 34 | if (!root->hasAttr(name: "root")) |
| 35 | return WalkResult::advance(); |
| 36 | |
| 37 | SmallVector<Operation *> selectedOps; |
| 38 | root->walk(callback: [&](Operation *selected) { |
| 39 | if (!selected->hasAttr(name: "selected")) |
| 40 | return WalkResult::advance(); |
| 41 | if (root->hasAttr(name: "ordered")) { |
| 42 | // If the root has an "ordered" attribute, we fill the selectedOps |
| 43 | // vector in a certain order. |
| 44 | int64_t pos = |
| 45 | cast<IntegerAttr>(selected->getDiscardableAttr(name: "selected")) |
| 46 | .getInt(); |
| 47 | if (pos >= static_cast<int64_t>(selectedOps.size())) |
| 48 | selectedOps.append(NumInputs: pos + 1 - selectedOps.size(), Elt: nullptr); |
| 49 | selectedOps[pos] = selected; |
| 50 | } else { |
| 51 | selectedOps.push_back(Elt: selected); |
| 52 | } |
| 53 | return WalkResult::advance(); |
| 54 | }); |
| 55 | |
| 56 | if (llvm::find(Range&: selectedOps, Val: nullptr) != selectedOps.end()) { |
| 57 | root->emitError(message: "invalid test case: some indices are missing among the " |
| 58 | "selected ops"); |
| 59 | return WalkResult::skip(); |
| 60 | } |
| 61 | |
| 62 | if (!computeTopologicalSorting(ops: selectedOps)) { |
| 63 | root->emitError(message: "could not schedule all ops"); |
| 64 | return WalkResult::skip(); |
| 65 | } |
| 66 | |
| 67 | for (const auto &it : llvm::enumerate(First&: selectedOps)) |
| 68 | it.value()->setAttr("pos", builder.getIndexAttr(it.index())); |
| 69 | |
| 70 | return WalkResult::advance(); |
| 71 | }); |
| 72 | |
| 73 | if (result.wasSkipped()) |
| 74 | signalPassFailure(); |
| 75 | } |
| 76 | }; |
| 77 | } // namespace |
| 78 | |
| 79 | namespace mlir { |
| 80 | namespace test { |
| 81 | void registerTestTopologicalSortAnalysisPass() { |
| 82 | PassRegistration<TestTopologicalSortAnalysisPass>(); |
| 83 | } |
| 84 | } // namespace test |
| 85 | } // namespace mlir |
| 86 |