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