C++ list::size方法代码示例

// getMembers - Copy over remaining items in RestOfArgs to our Members vector
// This is just for clarity.
void getMembers() {
  if(RestOfArgs.size() > 0)
    Members = std::vector<std::string>(RestOfArgs);
}

static int executeInput() {
  // Load any dylibs requested on the command line.
  loadDylibs();

  // Instantiate a dynamic linker.
  TrivialMemoryManager MemMgr;
  RuntimeDyld Dyld(MemMgr, MemMgr);

  // FIXME: Preserve buffers until resolveRelocations time to work around a bug
  //        in RuntimeDyldELF.
  // This fixme should be fixed ASAP. This is a very brittle workaround.
  std::vector<std::unique_ptr<MemoryBuffer>> InputBuffers;

  // If we don't have any input files, read from stdin.
  if (!InputFileList.size())
    InputFileList.push_back("-");
  for(unsigned i = 0, e = InputFileList.size(); i != e; ++i) {
    // Load the input memory buffer.
    ErrorOr<std::unique_ptr<MemoryBuffer>> InputBuffer =
        MemoryBuffer::getFileOrSTDIN(InputFileList[i]);
    if (std::error_code EC = InputBuffer.getError())
      return Error("unable to read input: '" + EC.message() + "'");
    ErrorOr<std::unique_ptr<ObjectFile>> MaybeObj(
      ObjectFile::createObjectFile((*InputBuffer)->getMemBufferRef()));

    if (std::error_code EC = MaybeObj.getError())
      return Error("unable to create object file: '" + EC.message() + "'");

    ObjectFile &Obj = **MaybeObj;
    InputBuffers.push_back(std::move(*InputBuffer));

    // Load the object file
    Dyld.loadObject(Obj);
    if (Dyld.hasError()) {
      return Error(Dyld.getErrorString());
    }
  }

  // Resolve all the relocations we can.
  Dyld.resolveRelocations();
  // Clear instruction cache before code will be executed.
  MemMgr.invalidateInstructionCache();

  // FIXME: Error out if there are unresolved relocations.

  // Get the address of the entry point (_main by default).
  void *MainAddress = Dyld.getSymbolLocalAddress(EntryPoint);
  if (!MainAddress)
    return Error("no definition for '" + EntryPoint + "'");

  // Invalidate the instruction cache for each loaded function.
  for (unsigned i = 0, e = MemMgr.FunctionMemory.size(); i != e; ++i) {
    sys::MemoryBlock &Data = MemMgr.FunctionMemory[i];
    // Make sure the memory is executable.
    std::string ErrorStr;
    sys::Memory::InvalidateInstructionCache(Data.base(), Data.size());
    if (!sys::Memory::setExecutable(Data, &ErrorStr))
      return Error("unable to mark function executable: '" + ErrorStr + "'");
  }

  // Dispatch to _main().
  errs() << "loaded '" << EntryPoint << "' at: " << (void*)MainAddress << "\n";

  int (*Main)(int, const char**) =
    (int(*)(int,const char**)) uintptr_t(MainAddress);
  const char **Argv = new const char*[2];
  // Use the name of the first input object module as argv[0] for the target.
  Argv[0] = InputFileList[0].c_str();
  Argv[1] = nullptr;
  return Main(1, Argv);
}

int main(int argc, char **argv) {
  // Print a stack trace if we signal out.
  sys::PrintStackTraceOnErrorSignal();
  PrettyStackTraceProgram X(argc, argv);
  llvm_shutdown_obj Y;  // Call llvm_shutdown() on exit.

  // Initialize targets and assembly printers/parsers.
  llvm::InitializeAllTargetInfos();
  llvm::InitializeAllTargetMCs();
  llvm::InitializeAllAsmParsers();
  llvm::InitializeAllDisassemblers();

  // Register the target printer for --version.
  cl::AddExtraVersionPrinter(TargetRegistry::printRegisteredTargetsForVersion);

  cl::ParseCommandLineOptions(argc, argv, "llvm machine code playground\n");
  TripleName = Triple::normalize(TripleName);
  setDwarfDebugFlags(argc, argv);

  setDwarfDebugProducer();

  const char *ProgName = argv[0];
  const Target *TheTarget = GetTarget(ProgName);
  if (!TheTarget)
    return 1;

  OwningPtr<MemoryBuffer> BufferPtr;
  if (error_code ec = MemoryBuffer::getFileOrSTDIN(InputFilename, BufferPtr)) {
    errs() << ProgName << ": " << ec.message() << '\n';
    return 1;
  }
  MemoryBuffer *Buffer = BufferPtr.take();

  SourceMgr SrcMgr;

  // Tell SrcMgr about this buffer, which is what the parser will pick up.
  SrcMgr.AddNewSourceBuffer(Buffer, SMLoc());

  // Record the location of the include directories so that the lexer can find
  // it later.
  SrcMgr.setIncludeDirs(IncludeDirs);

  llvm::OwningPtr<MCRegisterInfo> MRI(TheTarget->createMCRegInfo(TripleName));
  assert(MRI && "Unable to create target register info!");

  llvm::OwningPtr<MCAsmInfo> MAI(TheTarget->createMCAsmInfo(*MRI, TripleName));
  assert(MAI && "Unable to create target asm info!");

  // FIXME: This is not pretty. MCContext has a ptr to MCObjectFileInfo and
  // MCObjectFileInfo needs a MCContext reference in order to initialize itself.
  OwningPtr<MCObjectFileInfo> MOFI(new MCObjectFileInfo());
  MCContext Ctx(MAI.get(), MRI.get(), MOFI.get(), &SrcMgr);
  MOFI->InitMCObjectFileInfo(TripleName, RelocModel, CMModel, Ctx);

  if (SaveTempLabels)
    Ctx.setAllowTemporaryLabels(false);

  Ctx.setGenDwarfForAssembly(GenDwarfForAssembly);
  if (!DwarfDebugFlags.empty())
    Ctx.setDwarfDebugFlags(StringRef(DwarfDebugFlags));
  if (!DwarfDebugProducer.empty())
    Ctx.setDwarfDebugProducer(StringRef(DwarfDebugProducer));
  if (!DebugCompilationDir.empty())
    Ctx.setCompilationDir(DebugCompilationDir);
  if (!MainFileName.empty())
    Ctx.setMainFileName(MainFileName);

  // Package up features to be passed to target/subtarget
  std::string FeaturesStr;
  if (MAttrs.size()) {
    SubtargetFeatures Features;
    for (unsigned i = 0; i != MAttrs.size(); ++i)
      Features.AddFeature(MAttrs[i]);
    FeaturesStr = Features.getString();
  }

  OwningPtr<tool_output_file> Out(GetOutputStream());
  if (!Out)
    return 1;

  formatted_raw_ostream FOS(Out->os());
  OwningPtr<MCStreamer> Str;

  OwningPtr<MCInstrInfo> MCII(TheTarget->createMCInstrInfo());
  OwningPtr<MCSubtargetInfo>
    STI(TheTarget->createMCSubtargetInfo(TripleName, MCPU, FeaturesStr));

  MCInstPrinter *IP = NULL;
  if (FileType == OFT_AssemblyFile) {
    IP =
      TheTarget->createMCInstPrinter(OutputAsmVariant, *MAI, *MCII, *MRI, *STI);
    MCCodeEmitter *CE = 0;
    MCAsmBackend *MAB = 0;
    if (ShowEncoding) {
      CE = TheTarget->createMCCodeEmitter(*MCII, *MRI, *STI, Ctx);
      MAB = TheTarget->createMCAsmBackend(*MRI, TripleName, MCPU);
    }
    bool UseCFI = !DisableCFI;
    Str.reset(TheTarget->createAsmStreamer(Ctx, FOS, /*asmverbose*/true,
                                           /*useLoc*/ true,
//.........这里部分代码省略.........

// getRelPos - Extract the member filename from the command line for
// the [relpos] argument associated with a, b, and i modifiers
void getRelPos() {
  if(RestOfArgs.size() == 0)
    show_help("Expected [relpos] for a, b, or i modifier");
  RelPos = RestOfArgs[0];
  RestOfArgs.erase(RestOfArgs.begin());
}

static void getOptions() {
  if(RestOfArgs.size() == 0)
    show_help("Expected options");
  Options = RestOfArgs[0];
  RestOfArgs.erase(RestOfArgs.begin());
}

LLVMExecutionEngineRef
mono_llvm_create_ee (LLVMModuleProviderRef MP, AllocCodeMemoryCb *alloc_cb, FunctionEmittedCb *emitted_cb, ExceptionTableCb *exception_cb)
{
  std::string Error;

  force_pass_linking ();

  LLVMInitializeX86Target ();
  LLVMInitializeX86TargetInfo ();

  mono_mm = new MonoJITMemoryManager ();
  mono_mm->alloc_cb = alloc_cb;

#if LLVM_MAJOR_VERSION == 2 && LLVM_MINOR_VERSION < 8
   DwarfExceptionHandling = true;
#else
   JITExceptionHandling = true;
#endif
  // PrettyStackTrace installs signal handlers which trip up libgc
  DisablePrettyStackTrace = true;

  ExecutionEngine *EE = ExecutionEngine::createJIT (unwrap (MP), &Error, mono_mm, CodeGenOpt::Default);
  if (!EE) {
	  errs () << "Unable to create LLVM ExecutionEngine: " << Error << "\n";
	  g_assert_not_reached ();
  }
  EE->InstallExceptionTableRegister (exception_cb);
  mono_event_listener = new MonoJITEventListener (emitted_cb);
  EE->RegisterJITEventListener (mono_event_listener);

  fpm = new FunctionPassManager (unwrap (MP));

  fpm->add(new TargetData(*EE->getTargetData()));

#if LLVM_CHECK_VERSION(2, 9)
  PassRegistry &Registry = *PassRegistry::getPassRegistry();
  initializeCore(Registry);
  initializeScalarOpts(Registry);
  //initializeIPO(Registry);
  initializeAnalysis(Registry);
  initializeIPA(Registry);
  initializeTransformUtils(Registry);
  initializeInstCombine(Registry);
  //initializeInstrumentation(Registry);
  initializeTarget(Registry);
#endif

  llvm::cl::ParseEnvironmentOptions("mono", "MONO_LLVM", "", false);

  if (PassList.size() > 0) {
	  /* Use the passes specified by the env variable */
	  /* Only the passes in force_pass_linking () can be used */
	  for (unsigned i = 0; i < PassList.size(); ++i) {
		  const PassInfo *PassInf = PassList[i];
		  Pass *P = 0;

		  if (PassInf->getNormalCtor())
			  P = PassInf->getNormalCtor()();
		  fpm->add (P);
	  }
  } else {
	  /* Use the same passes used by 'opt' by default, without the ipo passes */
	  const char *opts = "-simplifycfg -domtree -domfrontier -scalarrepl -instcombine -simplifycfg -basiccg -domtree -domfrontier -scalarrepl -simplify-libcalls -instcombine -simplifycfg -instcombine -simplifycfg -reassociate -domtree -loops -loopsimplify -domfrontier -loopsimplify -lcssa -loop-rotate -licm -lcssa -loop-unswitch -instcombine -scalar-evolution -loopsimplify -lcssa -iv-users -indvars -loop-deletion -loopsimplify -lcssa -loop-unroll -instcombine -memdep -gvn -memdep -memcpyopt -sccp -instcombine -domtree -memdep -dse -adce -gvn -simplifycfg -preverify -domtree -verify";
	  char **args;
	  int i;

	  args = g_strsplit (opts, " ", 1000);
	  for (i = 0; args [i]; i++)
		  ;
	  llvm::cl::ParseCommandLineOptions (i, args, "", false);
	  g_strfreev (args);

	  for (unsigned i = 0; i < PassList.size(); ++i) {
		  const PassInfo *PassInf = PassList[i];
		  Pass *P = 0;

		  if (PassInf->getNormalCtor())
			  P = PassInf->getNormalCtor()();
		  fpm->add (P);
	  }

	  /*
	  fpm->add(createInstructionCombiningPass());
	  fpm->add(createReassociatePass());
	  fpm->add(createGVNPass());
	  fpm->add(createCFGSimplificationPass());
	  */
  }

  return wrap(EE);
}

static int printLineInfoForInput(bool LoadObjects, bool UseDebugObj) {
  assert(LoadObjects || !UseDebugObj);

  // Load any dylibs requested on the command line.
  loadDylibs();

  // If we don't have any input files, read from stdin.
  if (!InputFileList.size())
    InputFileList.push_back("-");
  for (auto &File : InputFileList) {
    // Instantiate a dynamic linker.
    TrivialMemoryManager MemMgr;
    RuntimeDyld Dyld(MemMgr, MemMgr);

    // Load the input memory buffer.

    ErrorOr<std::unique_ptr<MemoryBuffer>> InputBuffer =
        MemoryBuffer::getFileOrSTDIN(File);
    if (std::error_code EC = InputBuffer.getError())
      ErrorAndExit("unable to read input: '" + EC.message() + "'");

    Expected<std::unique_ptr<ObjectFile>> MaybeObj(
      ObjectFile::createObjectFile((*InputBuffer)->getMemBufferRef()));

    if (!MaybeObj) {
      std::string Buf;
      raw_string_ostream OS(Buf);
      logAllUnhandledErrors(MaybeObj.takeError(), OS, "");
      OS.flush();
      ErrorAndExit("unable to create object file: '" + Buf + "'");
    }

    ObjectFile &Obj = **MaybeObj;

    OwningBinary<ObjectFile> DebugObj;
    std::unique_ptr<RuntimeDyld::LoadedObjectInfo> LoadedObjInfo = nullptr;
    ObjectFile *SymbolObj = &Obj;
    if (LoadObjects) {
      // Load the object file
      LoadedObjInfo =
        Dyld.loadObject(Obj);

      if (Dyld.hasError())
        ErrorAndExit(Dyld.getErrorString());

      // Resolve all the relocations we can.
      Dyld.resolveRelocations();

      if (UseDebugObj) {
        DebugObj = LoadedObjInfo->getObjectForDebug(Obj);
        SymbolObj = DebugObj.getBinary();
        LoadedObjInfo.reset();
      }
    }

    std::unique_ptr<DIContext> Context(
      new DWARFContextInMemory(*SymbolObj,LoadedObjInfo.get()));

    std::vector<std::pair<SymbolRef, uint64_t>> SymAddr =
        object::computeSymbolSizes(*SymbolObj);

    // Use symbol info to iterate functions in the object.
    for (const auto &P : SymAddr) {
      object::SymbolRef Sym = P.first;
      Expected<SymbolRef::Type> TypeOrErr = Sym.getType();
      if (!TypeOrErr) {
        // TODO: Actually report errors helpfully.
        consumeError(TypeOrErr.takeError());
        continue;
      }
      SymbolRef::Type Type = *TypeOrErr;
      if (Type == object::SymbolRef::ST_Function) {
        Expected<StringRef> Name = Sym.getName();
        if (!Name) {
          // TODO: Actually report errors helpfully.
          consumeError(Name.takeError());
          continue;
        }
        Expected<uint64_t> AddrOrErr = Sym.getAddress();
        if (!AddrOrErr) {
          // TODO: Actually report errors helpfully.
          consumeError(AddrOrErr.takeError());
          continue;
        }
        uint64_t Addr = *AddrOrErr;

        uint64_t Size = P.second;
        // If we're not using the debug object, compute the address of the
        // symbol in memory (rather than that in the unrelocated object file)
        // and use that to query the DWARFContext.
        if (!UseDebugObj && LoadObjects) {
          auto SecOrErr = Sym.getSection();
          if (!SecOrErr) {
            // TODO: Actually report errors helpfully.
            consumeError(SecOrErr.takeError());
            continue;
          }
          object::section_iterator Sec = *SecOrErr;
          StringRef SecName;
          Sec->getName(SecName);
//.........这里部分代码省略.........

static int executeInput() {
  // Load any dylibs requested on the command line.
  loadDylibs();

  // Instantiate a dynamic linker.
  TrivialMemoryManager MemMgr;
  doPreallocation(MemMgr);
  RuntimeDyld Dyld(MemMgr, MemMgr);

  // If we don't have any input files, read from stdin.
  if (!InputFileList.size())
    InputFileList.push_back("-");
  for (auto &File : InputFileList) {
    // Load the input memory buffer.
    ErrorOr<std::unique_ptr<MemoryBuffer>> InputBuffer =
        MemoryBuffer::getFileOrSTDIN(File);
    if (std::error_code EC = InputBuffer.getError())
      ErrorAndExit("unable to read input: '" + EC.message() + "'");
    Expected<std::unique_ptr<ObjectFile>> MaybeObj(
      ObjectFile::createObjectFile((*InputBuffer)->getMemBufferRef()));

    if (!MaybeObj) {
      std::string Buf;
      raw_string_ostream OS(Buf);
      logAllUnhandledErrors(MaybeObj.takeError(), OS, "");
      OS.flush();
      ErrorAndExit("unable to create object file: '" + Buf + "'");
    }

    ObjectFile &Obj = **MaybeObj;

    // Load the object file
    Dyld.loadObject(Obj);
    if (Dyld.hasError()) {
      ErrorAndExit(Dyld.getErrorString());
    }
  }

  // Resove all the relocations we can.
  // FIXME: Error out if there are unresolved relocations.
  Dyld.resolveRelocations();

  // Get the address of the entry point (_main by default).
  void *MainAddress = Dyld.getSymbolLocalAddress(EntryPoint);
  if (!MainAddress)
    ErrorAndExit("no definition for '" + EntryPoint + "'");

  // Invalidate the instruction cache for each loaded function.
  for (auto &FM : MemMgr.FunctionMemory) {

    // Make sure the memory is executable.
    // setExecutable will call InvalidateInstructionCache.
    std::string ErrorStr;
    if (!sys::Memory::setExecutable(FM, &ErrorStr))
      ErrorAndExit("unable to mark function executable: '" + ErrorStr + "'");
  }

  // Dispatch to _main().
  errs() << "loaded '" << EntryPoint << "' at: " << (void*)MainAddress << "\n";

  int (*Main)(int, const char**) =
    (int(*)(int,const char**)) uintptr_t(MainAddress);
  const char **Argv = new const char*[2];
  // Use the name of the first input object module as argv[0] for the target.
  Argv[0] = InputFileList[0].c_str();
  Argv[1] = nullptr;
  return Main(1, Argv);
}

//Command line decoder control
void startCmdLine(){
    LLVMContext &Context = getGlobalContext();

    for (unsigned int i =0 ; i < PassList.size(); i++ ){
        cout << "Pass added: "<< PassList[i]->getPassName() << endl;
        cout << "Argument name :" << PassList[i]->getPassArgument() << endl;
    }

    clock_t timer = clock();

    //Parsing XDF file
    std::cout << "Parsing file " << XDFFile.getValue() << "." << endl;

    XDFParser xdfParser(Verbose);
    Network* network = xdfParser.parseFile(XDFFile, Context);

    cout << "Network parsed in : "<< (clock() - timer) * 1000 / CLOCKS_PER_SEC << " ms, start engine" << endl;

    //Parsing XCF file if needed
    if(XCFFile != "") {
        std::cout << "Parsing file " << XCFFile.getValue() << "." << endl;

        XCFParser xcfParser(Verbose);
        map<string, string>* mapping = xcfParser.parseFile(XCFFile);
        network->setMapping(mapping);
    }

    if (enableTrace){
        setTraces(network);
    }

    //Load network
    engine->load(network);

    // Optimizing decoder
    if (optLevel > 0){
        engine->optimize(network, optLevel);
    }

    // Verify the given decoder if needed
    if (Verify){
        engine->verify(network, "error.txt");
    }

    // Set input file
    input_file = (char*)VidFile.c_str();

    // Print the given decoder if needed
    if (OutputDir != ""){
        engine->print(network);
    }

    //Run network
    engine->run(network);

    cout << "End of Jade" << endl;
    cout << "Total time: " << (clock() - timer) * 1000 / CLOCKS_PER_SEC << " ms" << endl;
    if(XCFFile != "") {
        cout << "Note: This execution time is calculated from CPU clock. When more than 1 thread were run, "
                "the value displayed is higher than the real execution time." << endl;
    }
}

//.........这里部分代码省略.........
  if (OptLevelO1 || OptLevelO2 || OptLevelOs || OptLevelOz || OptLevelO3) {
    FPasses.reset(new FunctionPassManager(M.get()));
    if (TD)
      FPasses->add(new DataLayout(*TD));
    if (TM.get())
      TM->addAnalysisPasses(*FPasses);

  }

  if (PrintBreakpoints) {
    // Default to standard output.
    if (!Out) {
      if (OutputFilename.empty())
        OutputFilename = "-";

      std::string ErrorInfo;
      Out.reset(new tool_output_file(OutputFilename.c_str(), ErrorInfo,
                                     sys::fs::F_Binary));
      if (!ErrorInfo.empty()) {
        errs() << ErrorInfo << '\n';
        return 1;
      }
    }
    Passes.add(new BreakpointPrinter(Out->os()));
    NoOutput = true;
  }

  // If the -strip-debug command line option was specified, add it.  If
  // -std-compile-opts was also specified, it will handle StripDebug.
  if (StripDebug && !StandardCompileOpts)
    addPass(Passes, createStripSymbolsPass(true));

  // Create a new optimization pass for each one specified on the command line
  for (unsigned i = 0; i < PassList.size(); ++i) {
    // Check to see if -std-compile-opts was specified before this option.  If
    // so, handle it.
    if (StandardCompileOpts &&
        StandardCompileOpts.getPosition() < PassList.getPosition(i)) {
      AddStandardCompilePasses(Passes);
      StandardCompileOpts = false;
    }

    if (StandardLinkOpts &&
        StandardLinkOpts.getPosition() < PassList.getPosition(i)) {
      AddStandardLinkPasses(Passes);
      StandardLinkOpts = false;
    }

    if (OptLevelO1 && OptLevelO1.getPosition() < PassList.getPosition(i)) {
      AddOptimizationPasses(Passes, *FPasses, 1, 0);
      OptLevelO1 = false;
    }

    if (OptLevelO2 && OptLevelO2.getPosition() < PassList.getPosition(i)) {
      AddOptimizationPasses(Passes, *FPasses, 2, 0);
      OptLevelO2 = false;
    }

    if (OptLevelOs && OptLevelOs.getPosition() < PassList.getPosition(i)) {
      AddOptimizationPasses(Passes, *FPasses, 2, 1);
      OptLevelOs = false;
    }

    if (OptLevelOz && OptLevelOz.getPosition() < PassList.getPosition(i)) {
      AddOptimizationPasses(Passes, *FPasses, 2, 2);
      OptLevelOz = false;

//===----------------------------------------------------------------------===//
// main for instrument
//
int main(int argc, char **argv) {
  llvm_shutdown_obj X;  // Call llvm_shutdown() on exit.
  LLVMContext &Context = getGlobalContext();
  try {
    cl::ParseCommandLineOptions(argc, argv,
      "zoltar .bc -> .bc instrumenter and mutator\n");
    sys::PrintStackTraceOnErrorSignal();

    // Allocate a full target machine description only if necessary.
    // FIXME: The choice of target should be controllable on the command line.
    std::auto_ptr<TargetMachine> target;

    std::string ErrorMessage;

    // Load the input module...
    std::auto_ptr<Module> M;
    if (MemoryBuffer *Buffer
          = MemoryBuffer::getFileOrSTDIN(InputFilename, &ErrorMessage)) {
      M.reset(ParseBitcodeFile(Buffer, Context, &ErrorMessage));
      delete Buffer;
    }

    if (M.get() == 0) {
      errs() << argv[0] << ": ";
      if (ErrorMessage.size())
        errs() << ErrorMessage << "\n";
      else
        errs() << "bitcode didn't read correctly.\n";
      return 1;
    }

    // Figure out what stream we are supposed to write to...
    // FIXME: outs() is not binary!
    raw_ostream *Out = &outs();  // Default to printing to stdout...
    if (OutputFilename != "-") {
      std::string ErrorInfo;
      /*TODO: solve this problem */
      //Out = new raw_fd_ostream(OutputFilename.c_str(), /*Binary=*/true,
       //                        Force, ErrorInfo);
      Out = new raw_fd_ostream(OutputFilename.c_str(),ErrorInfo,0);
      if (!ErrorInfo.empty()) {
        errs() << ErrorInfo << '\n';
        if (!Force)
          errs() << "Use -f command line argument to force output\n";
        delete Out;
        return 1;
      }

      // Make sure that the Output file gets unlinked from the disk if we get a
      // SIGINT
      sys::RemoveFileOnSignal(sys::Path(OutputFilename));
    }

    // If the output is set to be emitted to standard out, and standard out is a
    // console, print out a warning message and refuse to do it.  We don't
    // impress anyone by spewing tons of binary goo to a terminal.
    if (!Force && !NoOutput && CheckBitcodeOutputToConsole(*Out,!Quiet)) {
      NoOutput = true;
    }

    // Create a PassManager to hold and optimize the collection of passes we are
    // about to build...
    //
    PassManager Passes;

    // Add an appropriate TargetData instance for this module...
    Passes.add(new TargetData(M.get()));

    // Create a new instrumentation pass for each one specified on the command line
    for (unsigned i = 0; i < PassList.size(); ++i) {
      
      const PassInfo *PassInf = PassList[i];
      Pass *P = 0;
      if (PassInf->getNormalCtor())
        P = PassInf->getNormalCtor()();
      else
        errs() << argv[0] << ": cannot create pass: "
               << PassInf->getPassName() << "\n";
      if (P) {
        Passes.add(P);
      }
    }
    
    // Enable the specified mutation operators
    if (!MutOps) {
      OperatorManager* OM = OperatorManager::getInstance();
      OperatorInfoList::iterator oit;
      for (oit = OM->getRegistered().begin(); oit != OM->getRegistered().end(); oit++) {
        (*oit)->setEnabled(true);
      }
    } else {    
        for (unsigned i = 0; i < OperatorList.size(); ++i) {
          
          OperatorInfo *OInf = OperatorList[i];
          
          OInf->setEnabled(true);
        }
//.........这里部分代码省略.........

int ObjectGenerator::process(Module *module) {
    cerr << "Starting object generation" << endl;
    cerr.flush();
//    if (false) {
        //
        // Initialize targets first, so that --version shows registered targets.
        //
        InitializeAllTargets();
        InitializeAllAsmPrinters();

        //
        // Load the module to be compiled...
        //
        SMDiagnostic Err;
        Module &mod = *module;

        //
        // If we are supposed to override the target triple, do so now.
        //
        if (! TargetTriple.empty())
            mod.setTargetTriple(TargetTriple);

        Triple TheTriple(mod.getTargetTriple());
        if (TheTriple.getTriple().empty())
            TheTriple.setTriple(sys::getHostTriple());

        //
        // Allocate target machine.  First, check whether the user has explicitly
        // specified an architecture to compile for. If so we have to look it up by
        // name, because it might be a backend that has no mapping to a target triple.
        //
        const Target *TheTarget = 0;
        if (! MArch.empty()) {
            for (TargetRegistry::iterator it = TargetRegistry::begin(), ie = TargetRegistry::end(); it != ie; ++it) {
                if (MArch == it -> getName()) {
                    TheTarget = &*it;
                    break;
                }
            }

            if (! TheTarget) {
                errs() << "RoseToLLVM" /*argv[0]*/ << ": error: invalid target '" << MArch << "'.\n";
                return 1;
            }

            //
            // Adjust the triple to match (if known), otherwise stick with the
            // module/host triple.
            //
            Triple::ArchType Type = Triple::getArchTypeForLLVMName(MArch);
            if (Type != Triple::UnknownArch)
                TheTriple.setArch(Type);
        } else {

        std::string Err;
        TheTarget = TargetRegistry::lookupTarget(TheTriple.getTriple(), Err);
        if (TheTarget == 0) {
            errs() << "RoseToLLVM" /*argv[0]*/ << ": error auto-selecting target for module '"
                   << Err << "'.  Please use the -march option to explicitly "
                   << "pick a target.\n";
            return 1;
        }
    }

    //
    // Package up features to be passed to target/subtarget
    //
    std::string FeaturesStr;
    if (MCPU.size() || MAttrs.size()) {
        SubtargetFeatures Features;
        Features.setCPU(MCPU);
        for (unsigned i = 0; i != MAttrs.size(); ++i)
            Features.AddFeature(MAttrs[i]);
        FeaturesStr = Features.getString();
    }

    std::auto_ptr<TargetMachine> target(TheTarget->createTargetMachine(TheTriple.getTriple(), FeaturesStr));
    assert(target.get() && "Could not allocate target machine!");
    TargetMachine &Target = *target.get();

    //
    // Figure out where we are going to send the output...
    //
    formatted_raw_ostream *Out = GetOutputStream(TheTarget -> getName(), "RoseToLLVM"/*argv[0]*/);
    if (Out == 0) return 1;

    CodeGenOpt::Level OLvl = CodeGenOpt::Default;
    switch (OptLevel) {
        default:
cerr << "The optimization level is " << OptLevel << endl;
cerr.flush();
            errs() << "RoseToLLVM" /*argv[0]*/ << ": invalid optimization level.\n";
            return 1;
        case ' ': break;
        case '0': OLvl = CodeGenOpt::None; break;
        case '1': OLvl = CodeGenOpt::Less; break;
        case '2': OLvl = CodeGenOpt::Default; break;
        case '3': OLvl = CodeGenOpt::Aggressive; break;
    }

//.........这里部分代码省略.........

//.........这里部分代码省略.........
        M->setDataLayout(DefaultDataLayout);
    }

    // Add internal analysis passes from the target machine.
    Passes.add(createTargetTransformInfoWrapperPass(TM ? TM->getTargetIRAnalysis()
               : TargetIRAnalysis()));

    std::unique_ptr<legacy::FunctionPassManager> FPasses;
    if (OptLevelO1 || OptLevelO2 || OptLevelOs || OptLevelOz || OptLevelO3) {
        FPasses.reset(new legacy::FunctionPassManager(M.get()));
        FPasses->add(createTargetTransformInfoWrapperPass(
                         TM ? TM->getTargetIRAnalysis() : TargetIRAnalysis()));
    }

    if (PrintBreakpoints) {
        // Default to standard output.
        if (!Out) {
            if (OutputFilename.empty())
                OutputFilename = "-";

            std::error_code EC;
            Out = llvm::make_unique<tool_output_file>(OutputFilename, EC,
                    sys::fs::F_None);
            if (EC) {
                errs() << EC.message() << '\n';
                return 1;
            }
        }
        Passes.add(createBreakpointPrinter(Out->os()));
        NoOutput = true;
    }

    // Create a new optimization pass for each one specified on the command line
    for (unsigned i = 0; i < PassList.size(); ++i) {
        if (StandardLinkOpts &&
                StandardLinkOpts.getPosition() < PassList.getPosition(i)) {
            AddStandardLinkPasses(Passes);
            StandardLinkOpts = false;
        }

        if (OptLevelO1 && OptLevelO1.getPosition() < PassList.getPosition(i)) {
            AddOptimizationPasses(Passes, *FPasses, 1, 0);
            OptLevelO1 = false;
        }

        if (OptLevelO2 && OptLevelO2.getPosition() < PassList.getPosition(i)) {
            AddOptimizationPasses(Passes, *FPasses, 2, 0);
            OptLevelO2 = false;
        }

        if (OptLevelOs && OptLevelOs.getPosition() < PassList.getPosition(i)) {
            AddOptimizationPasses(Passes, *FPasses, 2, 1);
            OptLevelOs = false;
        }

        if (OptLevelOz && OptLevelOz.getPosition() < PassList.getPosition(i)) {
            AddOptimizationPasses(Passes, *FPasses, 2, 2);
            OptLevelOz = false;
        }

        if (OptLevelO3 && OptLevelO3.getPosition() < PassList.getPosition(i)) {
            AddOptimizationPasses(Passes, *FPasses, 3, 0);
            OptLevelO3 = false;
        }

        const PassInfo *PassInf = PassList[i];

// Load and link the objects specified on the command line, but do not execute
// anything. Instead, attach a RuntimeDyldChecker instance and call it to
// verify the correctness of the linked memory.
static int linkAndVerify() {

  // Check for missing triple.
  if (TripleName == "")
    ErrorAndExit("-triple required when running in -verify mode.");

  // Look up the target and build the disassembler.
  Triple TheTriple(Triple::normalize(TripleName));
  std::string ErrorStr;
  const Target *TheTarget =
    TargetRegistry::lookupTarget("", TheTriple, ErrorStr);
  if (!TheTarget)
    ErrorAndExit("Error accessing target '" + TripleName + "': " + ErrorStr);

  TripleName = TheTriple.getTriple();

  std::unique_ptr<MCSubtargetInfo> STI(
    TheTarget->createMCSubtargetInfo(TripleName, MCPU, ""));
  if (!STI)
    ErrorAndExit("Unable to create subtarget info!");

  std::unique_ptr<MCRegisterInfo> MRI(TheTarget->createMCRegInfo(TripleName));
  if (!MRI)
    ErrorAndExit("Unable to create target register info!");

  std::unique_ptr<MCAsmInfo> MAI(TheTarget->createMCAsmInfo(*MRI, TripleName));
  if (!MAI)
    ErrorAndExit("Unable to create target asm info!");

  MCContext Ctx(MAI.get(), MRI.get(), nullptr);

  std::unique_ptr<MCDisassembler> Disassembler(
    TheTarget->createMCDisassembler(*STI, Ctx));
  if (!Disassembler)
    ErrorAndExit("Unable to create disassembler!");

  std::unique_ptr<MCInstrInfo> MII(TheTarget->createMCInstrInfo());

  std::unique_ptr<MCInstPrinter> InstPrinter(
      TheTarget->createMCInstPrinter(Triple(TripleName), 0, *MAI, *MII, *MRI));

  // Load any dylibs requested on the command line.
  loadDylibs();

  // Instantiate a dynamic linker.
  TrivialMemoryManager MemMgr;
  doPreallocation(MemMgr);
  RuntimeDyld Dyld(MemMgr, MemMgr);
  Dyld.setProcessAllSections(true);
  RuntimeDyldChecker Checker(Dyld, Disassembler.get(), InstPrinter.get(),
                             llvm::dbgs());

  // If we don't have any input files, read from stdin.
  if (!InputFileList.size())
    InputFileList.push_back("-");
  for (auto &Filename : InputFileList) {
    // Load the input memory buffer.
    ErrorOr<std::unique_ptr<MemoryBuffer>> InputBuffer =
        MemoryBuffer::getFileOrSTDIN(Filename);

    if (std::error_code EC = InputBuffer.getError())
      ErrorAndExit("unable to read input: '" + EC.message() + "'");

    Expected<std::unique_ptr<ObjectFile>> MaybeObj(
      ObjectFile::createObjectFile((*InputBuffer)->getMemBufferRef()));

    if (!MaybeObj) {
      std::string Buf;
      raw_string_ostream OS(Buf);
      logAllUnhandledErrors(MaybeObj.takeError(), OS, "");
      OS.flush();
      ErrorAndExit("unable to create object file: '" + Buf + "'");
    }

    ObjectFile &Obj = **MaybeObj;

    // Load the object file
    Dyld.loadObject(Obj);
    if (Dyld.hasError()) {
      ErrorAndExit(Dyld.getErrorString());
    }
  }

  // Re-map the section addresses into the phony target address space and add
  // dummy symbols.
  remapSectionsAndSymbols(TheTriple, MemMgr, Checker);

  // Resolve all the relocations we can.
  Dyld.resolveRelocations();

  // Register EH frames.
  Dyld.registerEHFrames();

  int ErrorCode = checkAllExpressions(Checker);
  if (Dyld.hasError())
    ErrorAndExit("RTDyld reported an error applying relocations:\n  " +
                 Dyld.getErrorString());
//.........这里部分代码省略.........

// main - Entry point for the llc compiler.
//
int main(int argc, char **argv) {
  llvm_shutdown_obj X;  // Call llvm_shutdown() on exit.
  cl::ParseCommandLineOptions(argc, argv, "llvm system compiler\n");
  sys::PrintStackTraceOnErrorSignal();

  // Load the module to be compiled...
  std::string ErrorMessage;
  std::auto_ptr<Module> M;
  
  std::auto_ptr<MemoryBuffer> Buffer(
                   MemoryBuffer::getFileOrSTDIN(InputFilename, &ErrorMessage));
  if (Buffer.get())
    M.reset(ParseBitcodeFile(Buffer.get(), &ErrorMessage));
  if (M.get() == 0) {
    std::cerr << argv[0] << ": bitcode didn't read correctly.\n";
    std::cerr << "Reason: " << ErrorMessage << "\n";
    return 1;
  }
  Module &mod = *M.get();
  
  // If we are supposed to override the target triple, do so now.
  if (!TargetTriple.empty())
    mod.setTargetTriple(TargetTriple);
  
  // Allocate target machine.  First, check whether the user has
  // explicitly specified an architecture to compile for.
  if (MArch == 0) {
    std::string Err;
    MArch = TargetMachineRegistry::getClosestStaticTargetForModule(mod, Err);
    if (MArch == 0) {
      std::cerr << argv[0] << ": error auto-selecting target for module '"
                << Err << "'.  Please use the -march option to explicitly "
                << "pick a target.\n";
      return 1;
    }
  }

  // Package up features to be passed to target/subtarget
  std::string FeaturesStr;
  if (MCPU.size() || MAttrs.size()) {
    SubtargetFeatures Features;
    Features.setCPU(MCPU);
    for (unsigned i = 0; i != MAttrs.size(); ++i)
      Features.AddFeature(MAttrs[i]);
    FeaturesStr = Features.getString();
  }
  
  std::auto_ptr<TargetMachine> target(MArch->CtorFn(mod, FeaturesStr));
  assert(target.get() && "Could not allocate target machine!");
  TargetMachine &Target = *target.get();

  // Figure out where we are going to send the output...
  std::ostream *Out = GetOutputStream(argv[0]);
  if (Out == 0) return 1;
  
  // If this target requires addPassesToEmitWholeFile, do it now.  This is
  // used by strange things like the C backend.
  if (Target.WantsWholeFile()) {
    PassManager PM;
    PM.add(new TargetData(*Target.getTargetData()));
    if (!NoVerify)
      PM.add(createVerifierPass());
    
    // Ask the target to add backend passes as necessary.
    if (Target.addPassesToEmitWholeFile(PM, *Out, FileType, Fast)) {
      std::cerr << argv[0] << ": target does not support generation of this"
                << " file type!\n";
      if (Out != &std::cout) delete Out;
      // And the Out file is empty and useless, so remove it now.
      sys::Path(OutputFilename).eraseFromDisk();
      return 1;
    }
    PM.run(mod);
  } else {
    // Build up all of the passes that we want to do to the module.
    ExistingModuleProvider Provider(M.release());
    FunctionPassManager Passes(&Provider);
    Passes.add(new TargetData(*Target.getTargetData()));
    
#ifndef NDEBUG
    if (!NoVerify)
      Passes.add(createVerifierPass());
#endif
  
    // Ask the target to add backend passes as necessary.
    MachineCodeEmitter *MCE = 0;

    switch (Target.addPassesToEmitFile(Passes, *Out, FileType, Fast)) {
    default:
      assert(0 && "Invalid file model!");
      return 1;
    case FileModel::Error:
      std::cerr << argv[0] << ": target does not support generation of this"
                << " file type!\n";
      if (Out != &std::cout) delete Out;
      // And the Out file is empty and useless, so remove it now.
      sys::Path(OutputFilename).eraseFromDisk();
      return 1;
//.........这里部分代码省略.........