| 1 | //===- TestCFGLoopInfo.cpp - Test CFG loop info 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 | // This file implements logic for testing the CFGLoopInfo analysis. |
| 10 | // |
| 11 | //===----------------------------------------------------------------------===// |
| 12 | |
| 13 | #include "mlir/Analysis/CFGLoopInfo.h" |
| 14 | #include "mlir/Interfaces/FunctionInterfaces.h" |
| 15 | #include "mlir/Pass/Pass.h" |
| 16 | |
| 17 | using namespace mlir; |
| 18 | |
| 19 | namespace { |
| 20 | /// A testing pass that applies the CFGLoopInfo analysis on a region and prints |
| 21 | /// the information it collected to llvm::errs(). |
| 22 | struct TestCFGLoopInfo |
| 23 | : public PassWrapper<TestCFGLoopInfo, InterfacePass<FunctionOpInterface>> { |
| 24 | MLIR_DEFINE_EXPLICIT_INTERNAL_INLINE_TYPE_ID(TestCFGLoopInfo) |
| 25 | |
| 26 | StringRef getArgument() const final { return "test-cfg-loop-info"; } |
| 27 | StringRef getDescription() const final { |
| 28 | return "Test the loop info analysis."; |
| 29 | } |
| 30 | |
| 31 | void runOnOperation() override; |
| 32 | }; |
| 33 | } // namespace |
| 34 | |
| 35 | void TestCFGLoopInfo::runOnOperation() { |
| 36 | auto func = getOperation(); |
| 37 | DominanceInfo &domInfo = getAnalysis<DominanceInfo>(); |
| 38 | Region ®ion = func.getFunctionBody(); |
| 39 | |
| 40 | // Prints the label of the test. |
| 41 | llvm::errs() << "Testing : "<< func.getNameAttr() << "\n"; |
| 42 | if (region.empty()) { |
| 43 | llvm::errs() << "empty region\n"; |
| 44 | return; |
| 45 | } |
| 46 | |
| 47 | // Print all the block identifiers first such that the tests can match them. |
| 48 | llvm::errs() << "Blocks : "; |
| 49 | region.front().printAsOperand(os&: llvm::errs()); |
| 50 | for (auto &block : region.getBlocks()) { |
| 51 | llvm::errs() << ", "; |
| 52 | block.printAsOperand(llvm::errs()); |
| 53 | } |
| 54 | llvm::errs() << "\n"; |
| 55 | |
| 56 | if (llvm::hasSingleElement(C&: region.getBlocks())) { |
| 57 | llvm::errs() << "no loops\n"; |
| 58 | return; |
| 59 | } |
| 60 | |
| 61 | llvm::DominatorTreeBase<mlir::Block, false> &domTree = |
| 62 | domInfo.getDomTree(region: ®ion); |
| 63 | mlir::CFGLoopInfo loopInfo(domTree); |
| 64 | |
| 65 | if (loopInfo.getTopLevelLoops().empty()) |
| 66 | llvm::errs() << "no loops\n"; |
| 67 | else |
| 68 | loopInfo.print(OS&: llvm::errs()); |
| 69 | } |
| 70 | |
| 71 | namespace mlir { |
| 72 | namespace test { |
| 73 | void registerTestCFGLoopInfoPass() { PassRegistration<TestCFGLoopInfo>(); } |
| 74 | } // namespace test |
| 75 | } // namespace mlir |
| 76 |