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/Module.h" 17 #include "llvm/IR/PassManager.h" 18 #include "llvm/InitializePasses.h" 19 #include "llvm/Pass.h" 20 using namespace llvm; 21 22 PreservedAnalyses BitcodeWriterPass::run(Module &M, ModuleAnalysisManager &AM) { 23 const ModuleSummaryIndex *Index = 24 EmitSummaryIndex ? &(AM.getResult<ModuleSummaryIndexAnalysis>(M)) 25 : nullptr; 26 WriteBitcodeToFile(M, OS, ShouldPreserveUseListOrder, Index, EmitModuleHash); 27 return PreservedAnalyses::all(); 28 } 29 30 namespace { 31 class WriteBitcodePass : public ModulePass { 32 raw_ostream &OS; // raw_ostream to print on 33 bool ShouldPreserveUseListOrder; 34 bool EmitSummaryIndex; 35 bool EmitModuleHash; 36 37 public: 38 static char ID; // Pass identification, replacement for typeid 39 WriteBitcodePass() : ModulePass(ID), OS(dbgs()) { 40 initializeWriteBitcodePassPass(*PassRegistry::getPassRegistry()); 41 } 42 43 explicit WriteBitcodePass(raw_ostream &o, bool ShouldPreserveUseListOrder, 44 bool EmitSummaryIndex, bool EmitModuleHash) 45 : ModulePass(ID), OS(o), 46 ShouldPreserveUseListOrder(ShouldPreserveUseListOrder), 47 EmitSummaryIndex(EmitSummaryIndex), EmitModuleHash(EmitModuleHash) { 48 initializeWriteBitcodePassPass(*PassRegistry::getPassRegistry()); 49 } 50 51 StringRef getPassName() const override { return "Bitcode Writer"; } 52 53 bool runOnModule(Module &M) override { 54 const ModuleSummaryIndex *Index = 55 EmitSummaryIndex 56 ? &(getAnalysis<ModuleSummaryIndexWrapperPass>().getIndex()) 57 : nullptr; 58 WriteBitcodeToFile(M, OS, ShouldPreserveUseListOrder, Index, 59 EmitModuleHash); 60 return false; 61 } 62 void getAnalysisUsage(AnalysisUsage &AU) const override { 63 AU.setPreservesAll(); 64 if (EmitSummaryIndex) 65 AU.addRequired<ModuleSummaryIndexWrapperPass>(); 66 } 67 }; 68 } 69 70 char WriteBitcodePass::ID = 0; 71 INITIALIZE_PASS_BEGIN(WriteBitcodePass, "write-bitcode", "Write Bitcode", false, 72 true) 73 INITIALIZE_PASS_DEPENDENCY(ModuleSummaryIndexWrapperPass) 74 INITIALIZE_PASS_END(WriteBitcodePass, "write-bitcode", "Write Bitcode", false, 75 true) 76 77 ModulePass *llvm::createBitcodeWriterPass(raw_ostream &Str, 78 bool ShouldPreserveUseListOrder, 79 bool EmitSummaryIndex, bool EmitModuleHash) { 80 return new WriteBitcodePass(Str, ShouldPreserveUseListOrder, 81 EmitSummaryIndex, EmitModuleHash); 82 } 83 84 bool llvm::isBitcodeWriterPass(Pass *P) { 85 return P->getPassID() == (llvm::AnalysisID)&WriteBitcodePass::ID; 86 } 87