1 //===- BitcodeWriterPass.cpp - Bitcode writing pass -----------------------===// 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 // BitcodeWriterPass implementation. 10 // 11 //===----------------------------------------------------------------------===// 12 13 #include "llvm/Bitcode/BitcodeWriterPass.h" 14 #include "llvm/Analysis/ModuleSummaryAnalysis.h" 15 #include "llvm/Bitcode/BitcodeWriter.h" 16 #include "llvm/IR/PassManager.h" 17 #include "llvm/InitializePasses.h" 18 #include "llvm/Pass.h" 19 using namespace llvm; 20 21 PreservedAnalyses BitcodeWriterPass::run(Module &M, ModuleAnalysisManager &AM) { 22 const ModuleSummaryIndex *Index = 23 EmitSummaryIndex ? &(AM.getResult<ModuleSummaryIndexAnalysis>(M)) 24 : nullptr; 25 WriteBitcodeToFile(M, OS, ShouldPreserveUseListOrder, Index, EmitModuleHash); 26 return PreservedAnalyses::all(); 27 } 28 29 namespace { 30 class WriteBitcodePass : public ModulePass { 31 raw_ostream &OS; // raw_ostream to print on 32 bool ShouldPreserveUseListOrder; 33 bool EmitSummaryIndex; 34 bool EmitModuleHash; 35 36 public: 37 static char ID; // Pass identification, replacement for typeid 38 WriteBitcodePass() : ModulePass(ID), OS(dbgs()) { 39 initializeWriteBitcodePassPass(*PassRegistry::getPassRegistry()); 40 } 41 42 explicit WriteBitcodePass(raw_ostream &o, bool ShouldPreserveUseListOrder, 43 bool EmitSummaryIndex, bool EmitModuleHash) 44 : ModulePass(ID), OS(o), 45 ShouldPreserveUseListOrder(ShouldPreserveUseListOrder), 46 EmitSummaryIndex(EmitSummaryIndex), EmitModuleHash(EmitModuleHash) { 47 initializeWriteBitcodePassPass(*PassRegistry::getPassRegistry()); 48 } 49 50 StringRef getPassName() const override { return "Bitcode Writer"; } 51 52 bool runOnModule(Module &M) override { 53 const ModuleSummaryIndex *Index = 54 EmitSummaryIndex 55 ? &(getAnalysis<ModuleSummaryIndexWrapperPass>().getIndex()) 56 : nullptr; 57 WriteBitcodeToFile(M, OS, ShouldPreserveUseListOrder, Index, 58 EmitModuleHash); 59 return false; 60 } 61 void getAnalysisUsage(AnalysisUsage &AU) const override { 62 AU.setPreservesAll(); 63 if (EmitSummaryIndex) 64 AU.addRequired<ModuleSummaryIndexWrapperPass>(); 65 } 66 }; 67 } 68 69 char WriteBitcodePass::ID = 0; 70 INITIALIZE_PASS_BEGIN(WriteBitcodePass, "write-bitcode", "Write Bitcode", false, 71 true) 72 INITIALIZE_PASS_DEPENDENCY(ModuleSummaryIndexWrapperPass) 73 INITIALIZE_PASS_END(WriteBitcodePass, "write-bitcode", "Write Bitcode", false, 74 true) 75 76 ModulePass *llvm::createBitcodeWriterPass(raw_ostream &Str, 77 bool ShouldPreserveUseListOrder, 78 bool EmitSummaryIndex, bool EmitModuleHash) { 79 return new WriteBitcodePass(Str, ShouldPreserveUseListOrder, 80 EmitSummaryIndex, EmitModuleHash); 81 } 82 83 bool llvm::isBitcodeWriterPass(Pass *P) { 84 return P->getPassID() == (llvm::AnalysisID)&WriteBitcodePass::ID; 85 } 86