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 // RemoveDIs: there's no bitcode representation of the DPValue debug-info, 23 // convert to dbg.values before writing out. 24 bool IsNewDbgInfoFormat = M.IsNewDbgInfoFormat; 25 if (IsNewDbgInfoFormat) 26 M.convertFromNewDbgValues(); 27 28 const ModuleSummaryIndex *Index = 29 EmitSummaryIndex ? &(AM.getResult<ModuleSummaryIndexAnalysis>(M)) 30 : nullptr; 31 WriteBitcodeToFile(M, OS, ShouldPreserveUseListOrder, Index, EmitModuleHash); 32 33 if (IsNewDbgInfoFormat) 34 M.convertToNewDbgValues(); 35 36 return PreservedAnalyses::all(); 37 } 38 39 namespace { 40 class WriteBitcodePass : public ModulePass { 41 raw_ostream &OS; // raw_ostream to print on 42 bool ShouldPreserveUseListOrder; 43 44 public: 45 static char ID; // Pass identification, replacement for typeid 46 WriteBitcodePass() : ModulePass(ID), OS(dbgs()) { 47 initializeWriteBitcodePassPass(*PassRegistry::getPassRegistry()); 48 } 49 50 explicit WriteBitcodePass(raw_ostream &o, bool ShouldPreserveUseListOrder) 51 : ModulePass(ID), OS(o), 52 ShouldPreserveUseListOrder(ShouldPreserveUseListOrder) { 53 initializeWriteBitcodePassPass(*PassRegistry::getPassRegistry()); 54 } 55 56 StringRef getPassName() const override { return "Bitcode Writer"; } 57 58 bool runOnModule(Module &M) override { 59 // RemoveDIs: there's no bitcode representation of the DPValue debug-info, 60 // convert to dbg.values before writing out. 61 bool IsNewDbgInfoFormat = M.IsNewDbgInfoFormat; 62 if (IsNewDbgInfoFormat) 63 M.convertFromNewDbgValues(); 64 65 WriteBitcodeToFile(M, OS, ShouldPreserveUseListOrder, /*Index=*/nullptr, 66 /*EmitModuleHash=*/false); 67 68 if (IsNewDbgInfoFormat) 69 M.convertToNewDbgValues(); 70 return false; 71 } 72 void getAnalysisUsage(AnalysisUsage &AU) const override { 73 AU.setPreservesAll(); 74 } 75 }; 76 } 77 78 char WriteBitcodePass::ID = 0; 79 INITIALIZE_PASS_BEGIN(WriteBitcodePass, "write-bitcode", "Write Bitcode", false, 80 true) 81 INITIALIZE_PASS_DEPENDENCY(ModuleSummaryIndexWrapperPass) 82 INITIALIZE_PASS_END(WriteBitcodePass, "write-bitcode", "Write Bitcode", false, 83 true) 84 85 ModulePass *llvm::createBitcodeWriterPass(raw_ostream &Str, 86 bool ShouldPreserveUseListOrder) { 87 return new WriteBitcodePass(Str, ShouldPreserveUseListOrder); 88 } 89 90 bool llvm::isBitcodeWriterPass(Pass *P) { 91 return P->getPassID() == (llvm::AnalysisID)&WriteBitcodePass::ID; 92 } 93