//===----------------------------------------------------------------------===//
// main for opt
//
int main(int argc, char **argv) {
  sys::PrintStackTraceOnErrorSignal();
  llvm::PrettyStackTraceProgram X(argc, argv);

  if (AnalyzeOnly && NoOutput) {
    errs() << argv[0] << ": analyze mode conflicts with no-output mode.\n";
    return 1;
  }
  
  // Enable debug stream buffering.
  EnableDebugBuffering = true;

  llvm_shutdown_obj Y;  // Call llvm_shutdown() on exit.
  LLVMContext &Context = getGlobalContext();
  
  cl::ParseCommandLineOptions(argc, argv,
    "llvm .bc -> .bc modular optimizer and analysis printer\n");

  // 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;

  SMDiagnostic Err;

  // Load the input module...
  std::auto_ptr<Module> M;
  M.reset(ParseIRFile(InputFilename, Err, Context));

  if (M.get() == 0) {
    Err.Print(argv[0], errs());
    return 1;
  }

  // Figure out what stream we are supposed to write to...
  OwningPtr<tool_output_file> Out;
  if (NoOutput) {
    if (!OutputFilename.empty())
      errs() << "WARNING: The -o (output filename) option is ignored when\n"
                "the --disable-output option is used.\n";
  } else {
    // Default to standard output.
    if (OutputFilename.empty())
      OutputFilename = "-";

    std::string ErrorInfo;
    Out.reset(new tool_output_file(OutputFilename.c_str(), ErrorInfo,
                                   raw_fd_ostream::F_Binary));
    if (!ErrorInfo.empty()) {
      errs() << ErrorInfo << '\n';
      return 1;
    }
  }

  // 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 && !AnalyzeOnly && !OutputAssembly)
    if (CheckBitcodeOutputToConsole(Out->os(), !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...
  TargetData *TD = 0;
  const std::string &ModuleDataLayout = M.get()->getDataLayout();
  if (!ModuleDataLayout.empty())
    TD = new TargetData(ModuleDataLayout);
  else if (!DefaultDataLayout.empty())
    TD = new TargetData(DefaultDataLayout);

  if (TD)
    Passes.add(TD);

  OwningPtr<PassManager> FPasses;
  if (OptLevelO1 || OptLevelO2 || OptLevelO3) {
    FPasses.reset(new PassManager());
    if (TD)
      FPasses->add(new TargetData(*TD));
  }

  // 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;
    }
//.........这里部分代码省略.........

  namespace format {

    static cl::opt<bool> Help("h", cl::desc("Alias for -help"), cl::Hidden);

    // Mark all our options with this category, everything else (except for -version
    // and -help) will be hidden.
    static cl::OptionCategory SwiftFormatCategory("Swift-format options");

    static cl::list<unsigned> Offsets("offset",
                                      cl::desc("Format a range starting at this byte offset.\n"
                                               "Multiple ranges can be formatted by specifying\n"
                                               "several -offset and -length pairs.\n"
                                               "Can only be used with one input file."),
                                      cl::cat(SwiftFormatCategory));
    static cl::list<unsigned> Lengths("length",
                                      cl::desc("Format a range of this length (in bytes).\n"
                                               "Multiple ranges can be formatted by specifying\n"
                                               "several -offset and -length pairs.\n"
                                               "When only a single -offset is specified without\n"
                                               "-length, clang-format will format up to the end\n"
                                               "of the file.\n"
                                               "Can only be used with one input file."),
                                      cl::cat(SwiftFormatCategory));
    static cl::list<std::string> LineRanges("lines",
                                            cl::desc("<start line>:<end line> - format a range of\n"
                                                     "lines (both 1-based).\n"
                                                     "Multiple ranges can be formatted by specifying\n"
                                                     "several -lines arguments.\n"
                                                     "Can't be used with -offset and -length.\n"
                                                     "Can only be used with one input file."),
                                            cl::cat(SwiftFormatCategory));

    static llvm::cl::opt<bool> UseTabs("usetabs",
                                       llvm::cl::desc("Use tabs for indentation"),
                                       cl::cat(SwiftFormatCategory));

    static llvm::cl::opt<unsigned> TabWidth("tabwidth",
                                            llvm::cl::desc("Assumed width of tab character"),
                                            cl::cat(SwiftFormatCategory));

    static llvm::cl::opt<unsigned> IndentWidth("indentwidth",
                                               llvm::cl::desc("Characters to indent"),
                                               cl::cat(SwiftFormatCategory));

    static cl::opt<std::string> AssumeFileName("assume-filename",
                                               cl::desc("When reading from stdin, clang-format assumes this\n"
                                                        "filename to look for a style config file (with\n"
                                                        "-style=file) and to determine the language."),
                                               cl::init("<stdin>"), cl::cat(SwiftFormatCategory));

    static cl::opt<bool> Inplace("i",
                                 cl::desc("Inplace edit <file>s, if specified."),
                                 cl::cat(SwiftFormatCategory));

    static cl::opt<bool> OutputXML("output-replacements-xml",
                                   cl::desc("Output replacements as XML."),
                                   cl::cat(SwiftFormatCategory));

    static cl::list<std::string> FileNames(cl::Positional, cl::desc("[<file> ...]"),
                                           cl::cat(SwiftFormatCategory));

    CodeFormatOptions FormatOptions;

    class FormatterDocument {
      SourceManager SM;
      unsigned BufferID;
      CompilerInvocation CompInv;
      std::unique_ptr<ParserUnit> Parser;

      class FormatterDiagConsumer: public swift::DiagnosticConsumer {

        void handleDiagnostic(SourceManager &SM, SourceLoc Loc,
                              DiagnosticKind Kind, StringRef Text,
                              const DiagnosticInfo &Info) override {
          llvm::errs() << "Parse error: " << Text << "\n";
        }

      } DiagConsumer;

    public:
      FormatterDocument(std::unique_ptr<llvm::MemoryBuffer> Buffer) {
        updateCode(std::move(Buffer));
      }

      void updateCode( std::unique_ptr<llvm::MemoryBuffer> buff ) {
        BufferID = SM.addNewSourceBuffer(std::move(buff));

        Parser.reset(
                     new ParserUnit(SM, BufferID,
                                    CompInv.getLangOptions(),
                                    CompInv.getModuleName())
                     );

        Parser->getDiagnosticEngine().addConsumer(DiagConsumer);
        auto &P = Parser->getParser();

        bool Done = false;
        while (!Done) {
          P.parseTopLevel();
          Done = P.Tok.is(tok::eof);
//.........这里部分代码省略.........

int main(int argc, char **argv) {
  // Print a stack trace if we signal out.
  sys::PrintStackTraceOnErrorSignal();
  PrettyStackTraceProgram X(argc, argv);
  
  LLVMContext &Context = getGlobalContext();
  llvm_shutdown_obj Y;  // Call llvm_shutdown() on exit.
  cl::ParseCommandLineOptions(argc, argv, "llvm linker\n");

  unsigned BaseArg = 0;
  std::string ErrorMessage;

  std::auto_ptr<Module> Composite(LoadFile(argv[0],
                                           InputFilenames[BaseArg], Context));
  if (Composite.get() == 0) {
    errs() << argv[0] << ": error loading file '"
           << InputFilenames[BaseArg] << "'\n";
    return 1;
  }

  for (unsigned i = BaseArg+1; i < InputFilenames.size(); ++i) {
    std::auto_ptr<Module> M(LoadFile(argv[0],
                                     InputFilenames[i], Context));
    if (M.get() == 0) {
      errs() << argv[0] << ": error loading file '" <<InputFilenames[i]<< "'\n";
      return 1;
    }

    if (Verbose) errs() << "Linking in '" << InputFilenames[i] << "'\n";

    if (Linker::LinkModules(Composite.get(), M.get(), Linker::DestroySource,
                            &ErrorMessage)) {
      errs() << argv[0] << ": link error in '" << InputFilenames[i]
             << "': " << ErrorMessage << "\n";
      return 1;
    }
  }

  // TODO: Iterate over the -l list and link in any modules containing
  // global symbols that have not been resolved so far.

  if (DumpAsm) errs() << "Here's the assembly:\n" << *Composite;

  std::string ErrorInfo;
  tool_output_file Out(OutputFilename.c_str(), ErrorInfo,
                       raw_fd_ostream::F_Binary);
  if (!ErrorInfo.empty()) {
    errs() << ErrorInfo << '\n';
    return 1;
  }

  if (verifyModule(*Composite)) {
    errs() << argv[0] << ": linked module is broken!\n";
    return 1;
  }

  if (Verbose) errs() << "Writing bitcode...\n";
  if (OutputAssembly) {
    Out.os() << *Composite;
  } else if (Force || !CheckBitcodeOutputToConsole(Out.os(), true))
    WriteBitcodeToFile(Composite.get(), Out.os());

  // Declare success.
  Out.keep();

  return 0;
}

//===----------------------------------------------------------------------===//
// main for opt
//
int main(int argc, char **argv) {
  sys::PrintStackTraceOnErrorSignal();
  llvm::PrettyStackTraceProgram X(argc, argv);

  // Enable debug stream buffering.
  EnableDebugBuffering = true;

  llvm_shutdown_obj Y;  // Call llvm_shutdown() on exit.
  LLVMContext &Context = getGlobalContext();

  InitializeAllTargets();
  InitializeAllTargetMCs();

  // Initialize passes
  PassRegistry &Registry = *PassRegistry::getPassRegistry();
  initializeCore(Registry);
  initializeDebugIRPass(Registry);
  initializeScalarOpts(Registry);
  initializeObjCARCOpts(Registry);
  initializeVectorization(Registry);
  initializeIPO(Registry);
  initializeAnalysis(Registry);
  initializeIPA(Registry);
  initializeTransformUtils(Registry);
  initializeInstCombine(Registry);
  initializeInstrumentation(Registry);
  initializeTarget(Registry);

  cl::ParseCommandLineOptions(argc, argv,
    "llvm .bc -> .bc modular optimizer and analysis printer\n");

  if (AnalyzeOnly && NoOutput) {
    errs() << argv[0] << ": analyze mode conflicts with no-output mode.\n";
    return 1;
  }

  SMDiagnostic Err;

  // Load the input module...
  OwningPtr<Module> M;
  M.reset(ParseIRFile(InputFilename, Err, Context));

  if (M.get() == 0) {
    Err.print(argv[0], errs());
    return 1;
  }

  // If we are supposed to override the target triple, do so now.
  if (!TargetTriple.empty())
    M->setTargetTriple(Triple::normalize(TargetTriple));

  // Figure out what stream we are supposed to write to...
  OwningPtr<tool_output_file> Out;
  if (NoOutput) {
    if (!OutputFilename.empty())
      errs() << "WARNING: The -o (output filename) option is ignored when\n"
                "the --disable-output option is used.\n";
  } else {
    // Default to standard output.
    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;
    }
  }

  // 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 && !AnalyzeOnly && !OutputAssembly)
    if (CheckBitcodeOutputToConsole(Out->os(), !Quiet))
      NoOutput = true;

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

  // Add an appropriate TargetLibraryInfo pass for the module's triple.
  TargetLibraryInfo *TLI = new TargetLibraryInfo(Triple(M->getTargetTriple()));

  // The -disable-simplify-libcalls flag actually disables all builtin optzns.
  if (DisableSimplifyLibCalls)
    TLI->disableAllFunctions();
  Passes.add(TLI);

  // Add an appropriate DataLayout instance for this module.
  DataLayout *TD = 0;
  const std::string &ModuleDataLayout = M.get()->getDataLayout();
  if (!ModuleDataLayout.empty())
    TD = new DataLayout(ModuleDataLayout);
  else if (!DefaultDataLayout.empty())
//.........这里部分代码省略.........

// Unbundle the files. Return true if an error was found.
static bool UnbundleFiles() {
  // Open Input file.
  ErrorOr<std::unique_ptr<MemoryBuffer>> CodeOrErr =
      MemoryBuffer::getFileOrSTDIN(InputFileNames.front());
  if (std::error_code EC = CodeOrErr.getError()) {
    errs() << "error: Can't open file " << InputFileNames.front() << ": "
           << EC.message() << "\n";
    return true;
  }

  MemoryBuffer &Input = *CodeOrErr.get();

  // Select the right files handler.
  std::unique_ptr<FileHandler> FH;
  FH.reset(CreateFileHandler(Input));

  // Quit if we don't have a handler.
  if (!FH.get())
    return true;

  // Read the header of the bundled file.
  FH.get()->ReadHeader(Input);

  // Create a work list that consist of the map triple/output file.
  StringMap<StringRef> Worklist;
  auto Output = OutputFileNames.begin();
  for (auto &Triple : TargetNames) {
    Worklist[Triple] = *Output;
    ++Output;
  }

  // Read all the bundles that are in the work list. If we find no bundles we
  // assume the file is meant for the host target.
  bool FoundHostBundle = false;
  while (!Worklist.empty()) {
    StringRef CurTriple = FH.get()->ReadBundleStart(Input);

    // We don't have more bundles.
    if (CurTriple.empty())
      break;

    auto Output = Worklist.find(CurTriple);
    // The file may have more bundles for other targets, that we don't care
    // about. Therefore, move on to the next triple
    if (Output == Worklist.end()) {
      continue;
    }

    // Check if the output file can be opened and copy the bundle to it.
    std::error_code EC;
    raw_fd_ostream OutputFile(Output->second, EC, sys::fs::F_None);
    if (EC) {
      errs() << "error: Can't open file " << Output->second << ": "
             << EC.message() << "\n";
      return true;
    }
    FH.get()->ReadBundle(OutputFile, Input);
    FH.get()->ReadBundleEnd(Input);
    Worklist.erase(Output);

    // Record if we found the host bundle.
    if (hasHostKind(CurTriple))
      FoundHostBundle = true;
  }

  // If no bundles were found, assume the input file is the host bundle and
  // create empty files for the remaining targets.
  if (Worklist.size() == TargetNames.size()) {
    for (auto &E : Worklist) {
      std::error_code EC;
      raw_fd_ostream OutputFile(E.second, EC, sys::fs::F_None);
      if (EC) {
        errs() << "error: Can't open file " << E.second << ": " << EC.message()
               << "\n";
        return true;
      }

      // If this entry has a host kind, copy the input file to the output file.
      if (hasHostKind(E.first()))
        OutputFile.write(Input.getBufferStart(), Input.getBufferSize());
    }
    return false;
  }

  // If we found elements, we emit an error if none of those were for the host.
  if (!FoundHostBundle) {
    errs() << "error: Can't find bundle for the host target\n";
    return true;
  }

  // If we still have any elements in the worklist, create empty files for them.
  for (auto &E : Worklist) {
    std::error_code EC;
    raw_fd_ostream OutputFile(E.second, EC, sys::fs::F_None);
    if (EC) {
      errs() << "error: Can't open file " << E.second << ": "  << EC.message()
             << "\n";
      return true;
    }
//.........这里部分代码省略.........

int main(int argc, const char **argv) {
  sys::PrintStackTraceOnErrorSignal(argv[0]);

  cl::HideUnrelatedOptions(ClangOffloadBundlerCategory);
  cl::SetVersionPrinter(PrintVersion);
  cl::ParseCommandLineOptions(
      argc, argv,
      "A tool to bundle several input files of the specified type <type> \n"
      "referring to the same source file but different targets into a single \n"
      "one. The resulting file can also be unbundled into different files by \n"
      "this tool if -unbundle is provided.\n");

  if (Help) {
    cl::PrintHelpMessage();
    return 0;
  }

  bool Error = false;
  if (Unbundle) {
    if (InputFileNames.size() != 1) {
      Error = true;
      errs() << "error: only one input file supported in unbundling mode.\n";
    }
    if (OutputFileNames.size() != TargetNames.size()) {
      Error = true;
      errs() << "error: number of output files and targets should match in "
                "unbundling mode.\n";
    }
  } else {
    if (OutputFileNames.size() != 1) {
      Error = true;
      errs() << "error: only one output file supported in bundling mode.\n";
    }
    if (InputFileNames.size() != TargetNames.size()) {
      Error = true;
      errs() << "error: number of input files and targets should match in "
                "bundling mode.\n";
    }
  }

  // Verify that the offload kinds and triples are known. We also check that we
  // have exactly one host target.
  unsigned Index = 0u;
  unsigned HostTargetNum = 0u;
  for (StringRef Target : TargetNames) {
    StringRef Kind;
    StringRef Triple;
    getOffloadKindAndTriple(Target, Kind, Triple);

    bool KindIsValid = !Kind.empty();
    KindIsValid = KindIsValid && StringSwitch<bool>(Kind)
                                     .Case("host", true)
                                     .Case("openmp", true)
                                     .Case("hip", true)
                                     .Default(false);

    bool TripleIsValid = !Triple.empty();
    llvm::Triple T(Triple);
    TripleIsValid &= T.getArch() != Triple::UnknownArch;

    if (!KindIsValid || !TripleIsValid) {
      Error = true;
      errs() << "error: invalid target '" << Target << "'";

      if (!KindIsValid)
        errs() << ", unknown offloading kind '" << Kind << "'";
      if (!TripleIsValid)
        errs() << ", unknown target triple '" << Triple << "'";
      errs() << ".\n";
    }

    if (KindIsValid && Kind == "host") {
      ++HostTargetNum;
      // Save the index of the input that refers to the host.
      HostInputIndex = Index;
    }

    ++Index;
  }

  if (HostTargetNum != 1) {
    Error = true;
    errs() << "error: expecting exactly one host target but got "
           << HostTargetNum << ".\n";
  }

  if (Error)
    return 1;

  // Save the current executable directory as it will be useful to find other
  // tools.
  BundlerExecutable = sys::fs::getMainExecutable(argv[0], &BundlerExecutable);

  return Unbundle ? UnbundleFiles() : BundleFiles();
}

//===----------------------------------------------------------------------===//
// main for opt
//
int main(int argc, char **argv) {
  sys::PrintStackTraceOnErrorSignal();
  llvm::PrettyStackTraceProgram X(argc, argv);

  // Enable debug stream buffering.
  EnableDebugBuffering = true;

  llvm_shutdown_obj Y;  // Call llvm_shutdown() on exit.
  LLVMContext &Context = getGlobalContext();

  InitializeAllTargets();
  InitializeAllTargetMCs();
  InitializeAllAsmPrinters();

  // Initialize passes
  PassRegistry &Registry = *PassRegistry::getPassRegistry();
  initializeCore(Registry);
  initializeScalarOpts(Registry);
  initializeObjCARCOpts(Registry);
  initializeVectorization(Registry);
  initializeIPO(Registry);
  initializeAnalysis(Registry);
  initializeIPA(Registry);
  initializeTransformUtils(Registry);
  initializeInstCombine(Registry);
  initializeInstrumentation(Registry);
  initializeTarget(Registry);
  // For codegen passes, only passes that do IR to IR transformation are
  // supported.
  initializeCodeGenPreparePass(Registry);
  initializeAtomicExpandPass(Registry);
  initializeRewriteSymbolsPass(Registry);
  initializeWinEHPreparePass(Registry);
  initializeDwarfEHPreparePass(Registry);

#ifdef LINK_POLLY_INTO_TOOLS
  polly::initializePollyPasses(Registry);
#endif

  // @LOCALMOD-BEGIN
  initializeAddPNaClExternalDeclsPass(Registry);
  initializeAllocateDataSegmentPass(Registry);
  initializeBackendCanonicalizePass(Registry);
  initializeCanonicalizeMemIntrinsicsPass(Registry);
  initializeCleanupUsedGlobalsMetadataPass(Registry);
  initializeConstantInsertExtractElementIndexPass(Registry);
  initializeExpandAllocasPass(Registry);
  initializeExpandArithWithOverflowPass(Registry);
  initializeExpandByValPass(Registry);
  initializeExpandConstantExprPass(Registry);
  initializeExpandCtorsPass(Registry);
  initializeExpandGetElementPtrPass(Registry);
  initializeExpandIndirectBrPass(Registry);
  initializeExpandLargeIntegersPass(Registry);
  initializeExpandShuffleVectorPass(Registry);
  initializeExpandSmallArgumentsPass(Registry);
  initializeExpandStructRegsPass(Registry);
  initializeExpandTlsConstantExprPass(Registry);
  initializeExpandTlsPass(Registry);
  initializeExpandVarArgsPass(Registry);
  initializeFixVectorLoadStoreAlignmentPass(Registry);
  initializeFlattenGlobalsPass(Registry);
  initializeGlobalCleanupPass(Registry);
  initializeGlobalizeConstantVectorsPass(Registry);
  initializeInsertDivideCheckPass(Registry);
  initializeInternalizeUsedGlobalsPass(Registry);
  initializeNormalizeAlignmentPass(Registry);
  initializePNaClABIVerifyFunctionsPass(Registry);
  initializePNaClABIVerifyModulePass(Registry);
  initializePNaClSjLjEHPass(Registry);
  initializePromoteI1OpsPass(Registry);
  initializePromoteIntegersPass(Registry);
  initializeRemoveAsmMemoryPass(Registry);
  initializeRenameEntryPointPass(Registry);
  initializeReplacePtrsWithIntsPass(Registry);
  initializeResolveAliasesPass(Registry);
  initializeResolvePNaClIntrinsicsPass(Registry);
  initializeRewriteAtomicsPass(Registry);
  initializeRewriteLLVMIntrinsicsPass(Registry);
  initializeRewritePNaClLibraryCallsPass(Registry);
  initializeSandboxIndirectCallsPass(Registry);
  initializeSandboxMemoryAccessesPass(Registry);
  initializeSimplifyAllocasPass(Registry);
  initializeSimplifyStructRegSignaturesPass(Registry);
  initializeStripAttributesPass(Registry);
  initializeStripMetadataPass(Registry);
  initializeStripModuleFlagsPass(Registry);
  initializeStripTlsPass(Registry);
  initializeSubstituteUndefsPass(Registry);
  // Emscripten passes:
  initializeExpandI64Pass(Registry);
  initializeExpandInsertExtractElementPass(Registry);
  initializeLowerEmAsyncifyPass(Registry);
  initializeLowerEmExceptionsPass(Registry);
  initializeLowerEmSetjmpPass(Registry);
  initializeNoExitRuntimePass(Registry);
  // Emscripten passes end.
//.........这里部分代码省略.........

/// runPasses - Run the specified passes on Program, outputting a bitcode file
/// and writing the filename into OutputFile if successful.  If the
/// optimizations fail for some reason (optimizer crashes), return true,
/// otherwise return false.  If DeleteOutput is set to true, the bitcode is
/// deleted on success, and the filename string is undefined.  This prints to
/// outs() a single line message indicating whether compilation was successful
/// or failed.
///
bool BugDriver::runPasses(Module *Program,
                          const std::vector<std::string> &Passes,
                          std::string &OutputFilename, bool DeleteOutput,
                          bool Quiet, unsigned NumExtraArgs,
                          const char * const *ExtraArgs) const {
  // setup the output file name
  outs().flush();
  SmallString<128> UniqueFilename;
  std::error_code EC = sys::fs::createUniqueFile(
      OutputPrefix + "-output-%%%%%%%.bc", UniqueFilename);
  if (EC) {
    errs() << getToolName() << ": Error making unique filename: "
           << EC.message() << "\n";
    return 1;
  }
  OutputFilename = UniqueFilename.str();

  // set up the input file name
  SmallString<128> InputFilename;
  int InputFD;
  EC = sys::fs::createUniqueFile(OutputPrefix + "-input-%%%%%%%.bc", InputFD,
                                 InputFilename);
  if (EC) {
    errs() << getToolName() << ": Error making unique filename: "
           << EC.message() << "\n";
    return 1;
  }

  tool_output_file InFile(InputFilename, InputFD);

  WriteBitcodeToFile(Program, InFile.os(), PreserveBitcodeUseListOrder);
  InFile.os().close();
  if (InFile.os().has_error()) {
    errs() << "Error writing bitcode file: " << InputFilename << "\n";
    InFile.os().clear_error();
    return 1;
  }

  std::string tool = OptCmd;
  if (OptCmd.empty()) {
    if (ErrorOr<std::string> Path = sys::findProgramByName("opt"))
      tool = *Path;
    else
      errs() << Path.getError().message() << "\n";
  }
  if (tool.empty()) {
    errs() << "Cannot find `opt' in PATH!\n";
    return 1;
  }

  std::string Prog;
  if (UseValgrind) {
    if (ErrorOr<std::string> Path = sys::findProgramByName("valgrind"))
      Prog = *Path;
    else
      errs() << Path.getError().message() << "\n";
  } else
    Prog = tool;
  if (Prog.empty()) {
    errs() << "Cannot find `valgrind' in PATH!\n";
    return 1;
  }

  // Ok, everything that could go wrong before running opt is done.
  InFile.keep();

  // setup the child process' arguments
  SmallVector<const char*, 8> Args;
  if (UseValgrind) {
    Args.push_back("valgrind");
    Args.push_back("--error-exitcode=1");
    Args.push_back("-q");
    Args.push_back(tool.c_str());
  } else
    Args.push_back(tool.c_str());

  Args.push_back("-o");
  Args.push_back(OutputFilename.c_str());
  for (unsigned i = 0, e = OptArgs.size(); i != e; ++i)
    Args.push_back(OptArgs[i].c_str());
  std::vector<std::string> pass_args;
  for (unsigned i = 0, e = PluginLoader::getNumPlugins(); i != e; ++i) {
    pass_args.push_back( std::string("-load"));
    pass_args.push_back( PluginLoader::getPlugin(i));
  }
  for (std::vector<std::string>::const_iterator I = Passes.begin(),
       E = Passes.end(); I != E; ++I )
    pass_args.push_back( std::string("-") + (*I) );
  for (std::vector<std::string>::const_iterator I = pass_args.begin(),
       E = pass_args.end(); I != E; ++I )
    Args.push_back(I->c_str());
  Args.push_back(InputFilename.c_str());
//.........这里部分代码省略.........

    // Returns true on error.
    static bool format(StringRef FileName) {
      ErrorOr<std::unique_ptr<MemoryBuffer>> CodeOrErr =
        MemoryBuffer::getFileOrSTDIN(FileName);
      if (std::error_code EC = CodeOrErr.getError()) {
        llvm::errs() << EC.message() << "\n";
        return true;
      }
      std::unique_ptr<llvm::MemoryBuffer> Code = std::move(CodeOrErr.get());
      if (Code->getBufferSize() == 0)
        return false; // Empty files are formatted correctly.

      FormatterDocument Doc(std::move(Code));

      if (!Offsets.empty() || !Lengths.empty()) {
        if (Offsets.size() != Lengths.size()) {
          llvm::errs() << "error: number of offsets not equal to number of lengths.\n";
          return true;
        }

        for ( unsigned i=0 ; i < Offsets.size() ; i++ ) {
          unsigned FromLine = Doc.getLineAndColumn(Offsets[i]).first;
          unsigned ToLine = Doc.getLineAndColumn(Offsets[i] + Lengths[i]).first;
          if (ToLine == 0) {
            llvm::errs() << "error: offset + length after end of file\n";
            return true;
          }
          std::ostringstream s;
          s << FromLine << ":" << ToLine;
          LineRanges.push_back(s.str());
        }
      }

      if (LineRanges.empty())
        LineRanges.push_back("1:999999");

      std::string Output = Doc.memBuffer().getBuffer();
      Replacements Replaces;

      for ( unsigned Range = 0 ; Range < LineRanges.size() ; Range++ ) {
        unsigned FromLine, ToLine;
        if (parseLineRange(LineRanges[Range], FromLine, ToLine)) {
          llvm::errs() << "error: invalid <start line>:<end line> pair\n";
          return true;
        }
        if (FromLine > ToLine) {
          llvm::errs() << "error: start line should be less than end line\n";
          return true;
        }

        for ( unsigned Line = FromLine ; Line<=ToLine ; Line++ ) {
          size_t Offset = getOffsetOfLine(Line,Output);
          ssize_t Length = getOffsetOfLine(Line+1,Output)-1-Offset;
          if (Length < 0)
            break;

          std::string Formatted = Doc.reformat(LineRange(Line,1), FormatOptions).second;
          if (Formatted.find_first_not_of(" \t\v\f", 0) == StringRef::npos)
              Formatted = "";

          if (Formatted == Output.substr(Offset, Length))
            continue;

          Output.replace(Offset, Length, Formatted);
          Doc.updateCode(std::move(MemoryBuffer::getMemBuffer(Output)));
          Replaces.insert(clang::tooling::Replacement(FileName, Offset, Length, Formatted));
        }
      }

      if (OutputXML) {
        llvm::outs() << "<?xml version='1.0'?>\n<replacements>\n";
        outputReplacementsXML(Replaces);
        llvm::outs() << "</replacements>\n";
      } else {
        if (Inplace) {
          if (FileName == "-") {
            llvm::errs() << "error: cannot use -i when reading from stdin.\n";
            return true;
          }
          else {
            std::error_code EC;
            raw_fd_ostream writer(FileName, EC, llvm::sys::fs::F_None);
            if (EC) {
              llvm::errs() << "error: writing " << FileName << ": " << EC.message() << "\n";
              return true;
            }
            writer << Output;
          }
        } else {
          llvm::outs() << Output;
        }
      }

      return false;
    }

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, UseCFI,
//.........这里部分代码省略.........

static int printLineInfoForInput() {
  // 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(unsigned i = 0, e = InputFileList.size(); i != e; ++i) {
    // Instantiate a dynamic linker.
    TrivialMemoryManager MemMgr;
    RuntimeDyld Dyld(MemMgr, MemMgr);

    // 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;

    // Load the object file
    std::unique_ptr<RuntimeDyld::LoadedObjectInfo> LoadedObjInfo =
      Dyld.loadObject(Obj);

    if (Dyld.hasError())
      return Error(Dyld.getErrorString());

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

    OwningBinary<ObjectFile> DebugObj = LoadedObjInfo->getObjectForDebug(Obj);

    std::unique_ptr<DIContext> Context(
      DIContext::getDWARFContext(*DebugObj.getBinary()));

    // Use symbol info to iterate functions in the object.
    for (object::symbol_iterator I = DebugObj.getBinary()->symbol_begin(),
                                 E = DebugObj.getBinary()->symbol_end();
         I != E; ++I) {
      object::SymbolRef::Type SymType;
      if (I->getType(SymType)) continue;
      if (SymType == object::SymbolRef::ST_Function) {
        StringRef  Name;
        uint64_t   Addr;
        uint64_t   Size;
        if (I->getName(Name)) continue;
        if (I->getAddress(Addr)) continue;
        if (I->getSize(Size)) continue;

        outs() << "Function: " << Name << ", Size = " << Size << "\n";

        DILineInfoTable Lines = Context->getLineInfoForAddressRange(Addr, Size);
        DILineInfoTable::iterator  Begin = Lines.begin();
        DILineInfoTable::iterator  End = Lines.end();
        for (DILineInfoTable::iterator It = Begin; It != End; ++It) {
          outs() << "  Line info @ " << It->first - Addr << ": "
                 << It->second.FileName << ", line:" << It->second.Line << "\n";
        }
      }
    }
  }

  return 0;
}

// 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 == "") {
    llvm::errs() << "Error: -triple required when running in -verify mode.\n";
    return 1;
  }

  // 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) {
    llvm::errs() << "Error accessing target '" << TripleName << "': "
                 << ErrorStr << "\n";
    return 1;
  }
  TripleName = TheTriple.getTriple();

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

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

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

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

  std::unique_ptr<MCDisassembler> Disassembler(
    TheTarget->createMCDisassembler(*STI, Ctx));
  assert(Disassembler && "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;
  RuntimeDyld Dyld(MemMgr, MemMgr);
  Dyld.setProcessAllSections(true);
  RuntimeDyldChecker Checker(Dyld, Disassembler.get(), InstPrinter.get(),
                             llvm::dbgs());

  // 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());
    }
  }

  // Re-map the section addresses into the phony target address space.
  remapSections(TheTriple, MemMgr, Checker);

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

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

  int ErrorCode = checkAllExpressions(Checker);
  if (Dyld.hasError()) {
    errs() << "RTDyld reported an error applying relocations:\n  "
           << Dyld.getErrorString() << "\n";
    ErrorCode = 1;
//.........这里部分代码省略.........

int main(int argc, char **argv) {
  // Print a stack trace if we signal out.
  sys::PrintStackTraceOnErrorSignal(argv[0]);
  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");
  MCTargetOptions MCOptions = InitMCTargetOptionsFromFlags();
  TripleName = Triple::normalize(TripleName);
  setDwarfDebugFlags(argc, argv);

  setDwarfDebugProducer();

  const char *ProgName = argv[0];
  const Target *TheTarget = GetTarget(ProgName);
  if (!TheTarget)
    return 1;
  // Now that GetTarget() has (potentially) replaced TripleName, it's safe to
  // construct the Triple object.
  Triple TheTriple(TripleName);

  ErrorOr<std::unique_ptr<MemoryBuffer>> BufferPtr =
      MemoryBuffer::getFileOrSTDIN(InputFilename);
  if (std::error_code EC = BufferPtr.getError()) {
    errs() << InputFilename << ": " << EC.message() << '\n';
    return 1;
  }
  MemoryBuffer *Buffer = BufferPtr->get();

  SourceMgr SrcMgr;

  // Tell SrcMgr about this buffer, which is what the parser will pick up.
  SrcMgr.AddNewSourceBuffer(std::move(*BufferPtr), SMLoc());

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

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

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

  MAI->setRelaxELFRelocations(RelaxELFRel);

  if (CompressDebugSections != DebugCompressionType::None) {
    if (!zlib::isAvailable()) {
      errs() << ProgName