1 //===- BitcodeWriterPass.cpp - Bitcode writing pass -----------------------===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 // 10 // BitcodeWriterPass implementation. 11 // 12 //===----------------------------------------------------------------------===// 13 14 #include "llvm/Bitcode/BitcodeWriterPass.h" 15 #include "llvm/Analysis/ModuleSummaryAnalysis.h" 16 #include "llvm/Bitcode/ReaderWriter.h" 17 #include "llvm/IR/Module.h" 18 #include "llvm/IR/PassManager.h" 19 #include "llvm/Pass.h" 20 using namespace llvm; 21 22 PreservedAnalyses BitcodeWriterPass::run(Module &M, ModuleAnalysisManager &) { 23 std::unique_ptr<ModuleSummaryIndex> Index; 24 if (EmitSummaryIndex) 25 Index = ModuleSummaryIndexBuilder(&M).takeIndex(); 26 WriteBitcodeToFile(&M, OS, ShouldPreserveUseListOrder, Index.get(), 27 EmitModuleHash); 28 return PreservedAnalyses::all(); 29 } 30 31 namespace { 32 class WriteBitcodePass : public ModulePass { 33 raw_ostream &OS; // raw_ostream to print on 34 bool ShouldPreserveUseListOrder; 35 bool EmitSummaryIndex; 36 bool EmitModuleHash; 37 38 public: 39 static char ID; // Pass identification, replacement for typeid 40 WriteBitcodePass() : ModulePass(ID), OS(dbgs()) { 41 initializeWriteBitcodePassPass(*PassRegistry::getPassRegistry()); 42 } 43 44 explicit WriteBitcodePass(raw_ostream &o, bool ShouldPreserveUseListOrder, 45 bool EmitSummaryIndex, bool EmitModuleHash) 46 : ModulePass(ID), OS(o), 47 ShouldPreserveUseListOrder(ShouldPreserveUseListOrder), 48 EmitSummaryIndex(EmitSummaryIndex), EmitModuleHash(EmitModuleHash) { 49 initializeWriteBitcodePassPass(*PassRegistry::getPassRegistry()); 50 } 51 52 const char *getPassName() const override { return "Bitcode Writer"; } 53 54 bool runOnModule(Module &M) override { 55 const ModuleSummaryIndex *Index = 56 EmitSummaryIndex 57 ? &(getAnalysis<ModuleSummaryIndexWrapperPass>().getIndex()) 58 : nullptr; 59 WriteBitcodeToFile(&M, OS, ShouldPreserveUseListOrder, Index, 60 EmitModuleHash); 61 return false; 62 } 63 void getAnalysisUsage(AnalysisUsage &AU) const override { 64 AU.setPreservesAll(); 65 if (EmitSummaryIndex) 66 AU.addRequired<ModuleSummaryIndexWrapperPass>(); 67 } 68 }; 69 } 70 71 char WriteBitcodePass::ID = 0; 72 INITIALIZE_PASS_BEGIN(WriteBitcodePass, "write-bitcode", "Write Bitcode", false, 73 true) 74 INITIALIZE_PASS_DEPENDENCY(ModuleSummaryIndexWrapperPass) 75 INITIALIZE_PASS_END(WriteBitcodePass, "write-bitcode", "Write Bitcode", false, 76 true) 77 78 ModulePass *llvm::createBitcodeWriterPass(raw_ostream &Str, 79 bool ShouldPreserveUseListOrder, 80 bool EmitSummaryIndex, bool EmitModuleHash) { 81 return new WriteBitcodePass(Str, ShouldPreserveUseListOrder, 82 EmitSummaryIndex, EmitModuleHash); 83 } 84
