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