1 //===- CycleAnalysis.cpp - Compute CycleInfo for LLVM IR ------------------===// 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 "llvm/Analysis/CycleAnalysis.h" 10 #include "llvm/ADT/GenericCycleImpl.h" 11 #include "llvm/IR/CFG.h" // for successors found by ADL in GenericCycleImpl.h 12 #include "llvm/InitializePasses.h" 13 14 using namespace llvm; 15 16 namespace llvm { 17 class Module; 18 } // namespace llvm 19 20 CycleInfo CycleAnalysis::run(Function &F, FunctionAnalysisManager &) { 21 CycleInfo CI; 22 CI.compute(F); 23 return CI; 24 } 25 26 AnalysisKey CycleAnalysis::Key; 27 28 CycleInfoPrinterPass::CycleInfoPrinterPass(raw_ostream &OS) : OS(OS) {} 29 30 PreservedAnalyses CycleInfoPrinterPass::run(Function &F, 31 FunctionAnalysisManager &AM) { 32 OS << "CycleInfo for function: " << F.getName() << "\n"; 33 AM.getResult<CycleAnalysis>(F).print(OS); 34 35 return PreservedAnalyses::all(); 36 } 37 38 PreservedAnalyses CycleInfoVerifierPass::run(Function &F, 39 FunctionAnalysisManager &AM) { 40 CycleInfo &CI = AM.getResult<CycleAnalysis>(F); 41 CI.verify(); 42 return PreservedAnalyses::all(); 43 } 44 45 //===----------------------------------------------------------------------===// 46 // CycleInfoWrapperPass Implementation 47 //===----------------------------------------------------------------------===// 48 // 49 // The implementation details of the wrapper pass that holds a CycleInfo 50 // suitable for use with the legacy pass manager. 51 // 52 //===----------------------------------------------------------------------===// 53 54 char CycleInfoWrapperPass::ID = 0; 55 56 CycleInfoWrapperPass::CycleInfoWrapperPass() : FunctionPass(ID) { 57 initializeCycleInfoWrapperPassPass(*PassRegistry::getPassRegistry()); 58 } 59 60 INITIALIZE_PASS_BEGIN(CycleInfoWrapperPass, "cycles", "Cycle Info Analysis", 61 true, true) 62 INITIALIZE_PASS_END(CycleInfoWrapperPass, "cycles", "Cycle Info Analysis", true, 63 true) 64 65 void CycleInfoWrapperPass::getAnalysisUsage(AnalysisUsage &AU) const { 66 AU.setPreservesAll(); 67 } 68 69 bool CycleInfoWrapperPass::runOnFunction(Function &Func) { 70 CI.clear(); 71 72 F = &Func; 73 CI.compute(Func); 74 return false; 75 } 76 77 void CycleInfoWrapperPass::print(raw_ostream &OS, const Module *) const { 78 OS << "CycleInfo for function: " << F->getName() << "\n"; 79 CI.print(OS); 80 } 81 82 void CycleInfoWrapperPass::releaseMemory() { 83 CI.clear(); 84 F = nullptr; 85 } 86