C++ GlobalObject::getName方法代码示例

Value *LocalValueMaterializer::materializeValueFor(Value *V) {
  auto *GO = dyn_cast<GlobalObject>(V);
  if (!GO)
    return nullptr;

  auto I = LocalVersions.find(GO);
  if (I != LocalVersions.end())
    return I->second;

  if (!Dropped.count(GO))
    return nullptr;

  Module &M = *GO->getParent();
  GlobalValue::LinkageTypes L = GO->getLinkage();
  GlobalObject *Declaration;
  if (auto *F = dyn_cast<Function>(GO)) {
    Declaration = Function::Create(F->getFunctionType(), L, "", &M);
  } else {
    auto *Var = cast<GlobalVariable>(GO);
    Declaration = new GlobalVariable(M, Var->getType()->getElementType(),
                                     Var->isConstant(), L,
                                     /*Initializer*/ nullptr);
  }
  Declaration->takeName(GO);
  Declaration->copyAttributesFrom(GO);

  GO->setLinkage(GlobalValue::InternalLinkage);
  GO->setName(Declaration->getName());
  Dropped.erase(GO);
  GO->replaceAllUsesWith(Declaration);

  LocalVersions[Declaration] = GO;

  return GO;
}

// Automatically import functions in Module \p DestModule based on the summaries
// index.
//
Expected<bool> FunctionImporter::importFunctions(
    Module &DestModule, const FunctionImporter::ImportMapTy &ImportList,
    bool ForceImportReferencedDiscardableSymbols) {
  DEBUG(dbgs() << "Starting import for Module "
               << DestModule.getModuleIdentifier() << "\n");
  unsigned ImportedCount = 0;

  // Linker that will be used for importing function
  Linker TheLinker(DestModule);
  // Do the actual import of functions now, one Module at a time
  std::set<StringRef> ModuleNameOrderedList;
  for (auto &FunctionsToImportPerModule : ImportList) {
    ModuleNameOrderedList.insert(FunctionsToImportPerModule.first());
  }
  for (auto &Name : ModuleNameOrderedList) {
    // Get the module for the import
    const auto &FunctionsToImportPerModule = ImportList.find(Name);
    assert(FunctionsToImportPerModule != ImportList.end());
    Expected<std::unique_ptr<Module>> SrcModuleOrErr = ModuleLoader(Name);
    if (!SrcModuleOrErr)
      return SrcModuleOrErr.takeError();
    std::unique_ptr<Module> SrcModule = std::move(*SrcModuleOrErr);
    assert(&DestModule.getContext() == &SrcModule->getContext() &&
           "Context mismatch");

    // If modules were created with lazy metadata loading, materialize it
    // now, before linking it (otherwise this will be a noop).
    if (Error Err = SrcModule->materializeMetadata())
      return std::move(Err);
    UpgradeDebugInfo(*SrcModule);

    auto &ImportGUIDs = FunctionsToImportPerModule->second;
    // Find the globals to import
    DenseSet<const GlobalValue *> GlobalsToImport;
    for (Function &F : *SrcModule) {
      if (!F.hasName())
        continue;
      auto GUID = F.getGUID();
      auto Import = ImportGUIDs.count(GUID);
      DEBUG(dbgs() << (Import ? "Is" : "Not") << " importing function " << GUID
                   << " " << F.getName() << " from "
                   << SrcModule->getSourceFileName() << "\n");
      if (Import) {
        if (Error Err = F.materialize())
          return std::move(Err);
        if (EnableImportMetadata) {
          // Add 'thinlto_src_module' metadata for statistics and debugging.
          F.setMetadata(
              "thinlto_src_module",
              llvm::MDNode::get(
                  DestModule.getContext(),
                  {llvm::MDString::get(DestModule.getContext(),
                                       SrcModule->getSourceFileName())}));
        }
        GlobalsToImport.insert(&F);
      }
    }
    for (GlobalVariable &GV : SrcModule->globals()) {
      if (!GV.hasName())
        continue;
      auto GUID = GV.getGUID();
      auto Import = ImportGUIDs.count(GUID);
      DEBUG(dbgs() << (Import ? "Is" : "Not") << " importing global " << GUID
                   << " " << GV.getName() << " from "
                   << SrcModule->getSourceFileName() << "\n");
      if (Import) {
        if (Error Err = GV.materialize())
          return std::move(Err);
        GlobalsToImport.insert(&GV);
      }
    }
    for (GlobalAlias &GA : SrcModule->aliases()) {
      if (!GA.hasName())
        continue;
      auto GUID = GA.getGUID();
      auto Import = ImportGUIDs.count(GUID);
      DEBUG(dbgs() << (Import ? "Is" : "Not") << " importing alias " << GUID
                   << " " << GA.getName() << " from "
                   << SrcModule->getSourceFileName() << "\n");
      if (Import) {
        // Alias can't point to "available_externally". However when we import
        // linkOnceODR the linkage does not change. So we import the alias
        // and aliasee only in this case. This has been handled by
        // computeImportForFunction()
        GlobalObject *GO = GA.getBaseObject();
        assert(GO->hasLinkOnceODRLinkage() &&
               "Unexpected alias to a non-linkonceODR in import list");
#ifndef NDEBUG
        if (!GlobalsToImport.count(GO))
          DEBUG(dbgs() << " alias triggers importing aliasee " << GO->getGUID()
                       << " " << GO->getName() << " from "
                       << SrcModule->getSourceFileName() << "\n");
#endif
        if (Error Err = GO->materialize())
          return std::move(Err);
        GlobalsToImport.insert(GO);
        if (Error Err = GA.materialize())
//.........这里部分代码省略.........

// Automatically import functions in Module \p DestModule based on the summaries
// index.
//
bool FunctionImporter::importFunctions(
    Module &DestModule, const FunctionImporter::ImportMapTy &ImportList) {
  DEBUG(dbgs() << "Starting import for Module "
               << DestModule.getModuleIdentifier() << "\n");
  unsigned ImportedCount = 0;

  // Linker that will be used for importing function
  Linker TheLinker(DestModule);
  // Do the actual import of functions now, one Module at a time
  std::set<StringRef> ModuleNameOrderedList;
  for (auto &FunctionsToImportPerModule : ImportList) {
    ModuleNameOrderedList.insert(FunctionsToImportPerModule.first());
  }
  for (auto &Name : ModuleNameOrderedList) {
    // Get the module for the import
    const auto &FunctionsToImportPerModule = ImportList.find(Name);
    assert(FunctionsToImportPerModule != ImportList.end());
    std::unique_ptr<Module> SrcModule = ModuleLoader(Name);
    assert(&DestModule.getContext() == &SrcModule->getContext() &&
           "Context mismatch");

    // If modules were created with lazy metadata loading, materialize it
    // now, before linking it (otherwise this will be a noop).
    SrcModule->materializeMetadata();
    UpgradeDebugInfo(*SrcModule);

    auto &ImportGUIDs = FunctionsToImportPerModule->second;
    // Find the globals to import
    DenseSet<const GlobalValue *> GlobalsToImport;
    for (auto &GV : *SrcModule) {
      if (!GV.hasName())
        continue;
      auto GUID = GV.getGUID();
      auto Import = ImportGUIDs.count(GUID);
      DEBUG(dbgs() << (Import ? "Is" : "Not") << " importing " << GUID << " "
                   << GV.getName() << " from " << SrcModule->getSourceFileName()
                   << "\n");
      if (Import) {
        GV.materialize();
        GlobalsToImport.insert(&GV);
      }
    }
    for (auto &GV : SrcModule->globals()) {
      if (!GV.hasName())
        continue;
      auto GUID = GV.getGUID();
      auto Import = ImportGUIDs.count(GUID);
      DEBUG(dbgs() << (Import ? "Is" : "Not") << " importing " << GUID << " "
                   << GV.getName() << " from " << SrcModule->getSourceFileName()
                   << "\n");
      if (Import) {
        GV.materialize();
        GlobalsToImport.insert(&GV);
      }
    }
    for (auto &GV : SrcModule->aliases()) {
      if (!GV.hasName())
        continue;
      auto GUID = GV.getGUID();
      auto Import = ImportGUIDs.count(GUID);
      DEBUG(dbgs() << (Import ? "Is" : "Not") << " importing " << GUID << " "
                   << GV.getName() << " from " << SrcModule->getSourceFileName()
                   << "\n");
      if (Import) {
        // Alias can't point to "available_externally". However when we import
        // linkOnceODR the linkage does not change. So we import the alias
        // and aliasee only in this case.
        GlobalObject *GO = GV.getBaseObject();
        if (!GO->hasLinkOnceODRLinkage())
          continue;
#ifndef NDEBUG
        if (!GlobalsToImport.count(GO))
          DEBUG(dbgs() << " alias triggers importing aliasee " << GO->getGUID()
                       << " " << GO->getName() << " from "
                       << SrcModule->getSourceFileName() << "\n");
#endif
        GO->materialize();
        GlobalsToImport.insert(GO);
        GV.materialize();
        GlobalsToImport.insert(&GV);
      }
    }

    // Link in the specified functions.
    if (renameModuleForThinLTO(*SrcModule, Index, &GlobalsToImport))
      return true;

    if (PrintImports) {
      for (const auto *GV : GlobalsToImport)
        dbgs() << DestModule.getSourceFileName() << ": Import " << GV->getName()
               << " from " << SrcModule->getSourceFileName() << "\n";
    }

    if (TheLinker.linkInModule(std::move(SrcModule), Linker::Flags::None,
                               &GlobalsToImport))
      report_fatal_error("Function Import: link error");

//.........这里部分代码省略.........