C++ OwningPtr::keep方法代码示例

int main(int argc, char **argv) {
  // Init LLVM, call llvm_shutdown() on exit, parse args, etc.
  llvm::PrettyStackTraceProgram X(argc, argv);
  cl::ParseCommandLineOptions(argc, argv, "llvm codegen stress-tester\n");
  llvm_shutdown_obj Y;

  std::auto_ptr<Module> M(new Module("/tmp/autogen.bc", getGlobalContext()));
  Function *F = GenEmptyFunction(M.get());
  FillFunction(F);
  IntroduceControlFlow(F);

  // Figure out what stream we are supposed to write to...
  OwningPtr<tool_output_file> Out;
  // 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;
  }

  PassManager Passes;
  Passes.add(createVerifierPass());
  Passes.add(createPrintModulePass(&Out->os()));
  Passes.run(*M.get());
  Out->keep();

  return 0;
}

static void WriteOutputFile(const Module *M) {
  // Infer the output filename if needed.
  if (OutputFilename.empty()) {
    if (InputFilename == "-") {
      OutputFilename = "-";
    } else {
      std::string IFN = InputFilename;
      int Len = IFN.length();
      if (IFN[Len-3] == '.' && IFN[Len-2] == 'l' && IFN[Len-1] == 'l') {
        // Source ends in .ll
        OutputFilename = std::string(IFN.begin(), IFN.end()-3);
      } else {
        OutputFilename = IFN;   // Append a .bc to it
      }
      OutputFilename += ".bc";
    }
  }

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

  if (Force || !CheckBitcodeOutputToConsole(Out->os(), true))
    WriteBitcodeToFile(M, Out->os());

  // Declare success.
  Out->keep();
}

static void WriteOutputFile(const Module *M) {

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

  NaClWriteBitcodeToFile(M, Out->os(), /* AcceptSupportedOnly = */ false);

  // Declare success.
  Out->keep();
}

int
main (int argc, char ** argv)
{
  if (argc < 3) {
    fprintf(stderr,"Not enough positional arguments to %s.\n",argv[0]);
    return 1;
  }

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

  std::string InputFilename(argv[1]);
  std::string OutputFilename(argv[2]);

  OwningPtr<tool_output_file> Out;
  
  std::string ErrorInfo;
  Out.reset(new tool_output_file(OutputFilename.c_str(), ErrorInfo,
				 sys::fs::F_Binary));

  SMDiagnostic Err;

  std::auto_ptr<Module> M;
  M.reset(ParseIRFile(InputFilename, Err, Context));

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


  Summarize(M.get());

  WriteBitcodeToFile(M.get(),Out->os());

  Out->keep();

  return 0;
}

int main(int argc, char **argv) {
  // Init LLVM, call llvm_shutdown() on exit, parse args, etc.
  llvm::PrettyStackTraceProgram X(argc, argv);
  cl::ParseCommandLineOptions(argc, argv, "llvm codegen stress-tester\n");
  llvm_shutdown_obj Y;

  OwningPtr<Module> M(new Module("/tmp/autogen.bc", getGlobalContext()));
  Function *F = GenEmptyFunction(M.get());

  // Pick an initial seed value
  Random R(SeedCL);
  // Generate lots of random instructions inside a single basic block.
  FillFunction(F, R);
  // Break the basic block into many loops.
  IntroduceControlFlow(F, R);

  // Figure out what stream we are supposed to write to...
  OwningPtr<tool_output_file> Out;
  // 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;
  }

  PassManager Passes;
  Passes.add(createVerifierPass());
  Passes.add(createPrintModulePass(Out->os()));
  Passes.run(*M.get());
  Out->keep();

  return 0;
}

//.........这里部分代码省略.........
          Passes.add(new LoopPassPrinter(PassInf, Out->os()));
          break;
        case PT_Function:
          Passes.add(new FunctionPassPrinter(PassInf, Out->os()));
          break;
        case PT_CallGraphSCC:
          Passes.add(new CallGraphSCCPassPrinter(PassInf, Out->os()));
          break;
        default:
          Passes.add(new ModulePassPrinter(PassInf, Out->os()));
          break;
        }
      }
    }

    if (PrintEachXForm)
      Passes.add(createPrintModulePass(&errs()));
  }

  // If -std-compile-opts was specified at the end of the pass list, add them.
  if (StandardCompileOpts) {
    AddStandardCompilePasses(Passes);
    StandardCompileOpts = false;
  }

  if (StandardLinkOpts) {
    AddStandardLinkPasses(Passes);
    StandardLinkOpts = false;
  }

  if (OptLevelO1)
    AddOptimizationPasses(Passes, *FPasses, 1, 0);

  if (OptLevelO2)
    AddOptimizationPasses(Passes, *FPasses, 2, 0);

  if (OptLevelOs)
    AddOptimizationPasses(Passes, *FPasses, 2, 1);

  if (OptLevelOz)
    AddOptimizationPasses(Passes, *FPasses, 2, 2);

  if (OptLevelO3)
    AddOptimizationPasses(Passes, *FPasses, 3, 0);

  if (OptLevelO1 || OptLevelO2 || OptLevelOs || OptLevelOz || OptLevelO3) {
    FPasses->doInitialization();
    for (Module::iterator F = M->begin(), E = M->end(); F != E; ++F)
      FPasses->run(*F);
    FPasses->doFinalization();
  }

  // @LOCALMOD-BEGIN
  if (PNaClABISimplifyPreOpt)
    PNaClABISimplifyAddPreOptPasses(Passes);

  if (PNaClABISimplifyPostOpt)
    PNaClABISimplifyAddPostOptPasses(Passes);
  // @LOCALMOD-END

  // Check that the module is well formed on completion of optimization
  if (!NoVerify && !VerifyEach)
    Passes.add(createVerifierPass());

  // Write bitcode or assembly to the output as the last step...
  if (!NoOutput && !AnalyzeOnly) {
    if (OutputAssembly)
      Passes.add(createPrintModulePass(&Out->os()));
    // @LOCALMOD
  }

  // Before executing passes, print the final values of the LLVM options.
  cl::PrintOptionValues();

  // Now that we have all of the passes ready, run them.
  Passes.run(*M.get());

// @LOCALMOD-BEGIN
  // Write bitcode to the output.
  if (!NoOutput && !AnalyzeOnly && !OutputAssembly) {
    switch (OutputFileFormat) {
      case LLVMFormat:
        WriteBitcodeToFile(M.get(), Out->os());
        break;
      case PNaClFormat:
        NaClWriteBitcodeToFile(M.get(), Out->os());
        break;
      default:
        errs() << "Don't understand bitcode format for generated bitcode.\n";
        return 1;
    }
  }
// @LOCALMOD-END

  // Declare success.
  if (!NoOutput || PrintBreakpoints)
    Out->keep();

  return 0;
}

//.........这里部分代码省略.........
  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;
  }

  TargetOptions Options;
  Options.LessPreciseFPMADOption = EnableFPMAD;
  Options.NoFramePointerElim = DisableFPElim;
  Options.NoFramePointerElimNonLeaf = DisableFPElimNonLeaf;
  Options.NoExcessFPPrecision = DisableExcessPrecision;
  Options.UnsafeFPMath = EnableUnsafeFPMath;
  Options.NoInfsFPMath = EnableNoInfsFPMath;
  Options.NoNaNsFPMath = EnableNoNaNsFPMath;
  Options.HonorSignDependentRoundingFPMathOption =
      EnableHonorSignDependentRoundingFPMath;
  Options.UseSoftFloat = GenerateSoftFloatCalls;
  if (FloatABIForCalls != FloatABI::Default)
    Options.FloatABIType = FloatABIForCalls;
  Options.NoZerosInBSS = DontPlaceZerosInBSS;
  Options.GuaranteedTailCallOpt = EnableGuaranteedTailCallOpt;
  Options.DisableTailCalls = DisableTailCalls;
  Options.StackAlignmentOverride = OverrideStackAlignment;
  Options.RealignStack = EnableRealignStack;
  Options.DisableJumpTables = DisableSwitchTables;
  Options.TrapFuncName = TrapFuncName;
  Options.PositionIndependentExecutable = EnablePIE;
  Options.EnableSegmentedStacks = SegmentedStacks;

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

  if (DisableDotLoc)
    Target.setMCUseLoc(false);

  if (DisableCFI)
    Target.setMCUseCFI(false);

  if (EnableDwarfDirectory)
    Target.setMCUseDwarfDirectory(true);

  if (GenerateSoftFloatCalls)
    FloatABIForCalls = FloatABI::Soft;

  // Disable .loc support for older OS X versions.
  if (TheTriple.isMacOSX() &&
      TheTriple.isMacOSXVersionLT(10, 6))
    Target.setMCUseLoc(false);

  // Figure out where we are going to send the output...
  OwningPtr<tool_output_file> Out
    (GetOutputStream(TheTarget->getName(), TheTriple.getOS(), argv[0]));
  if (!Out) return 1;

  // Build up all of the passes that we want to do to the module.
  PassManager PM;

  // Add the target data from the target machine, if it exists, or the module.
  if (const TargetData *TD = Target.getTargetData())
    PM.add(new TargetData(*TD));
  else
    PM.add(new TargetData(&mod));

  // Override default to generate verbose assembly.
  Target.setAsmVerbosityDefault(true);

  if (RelaxAll) {
    if (FileType != TargetMachine::CGFT_ObjectFile)
      errs() << argv[0]
             << ": warning: ignoring -mc-relax-all because filetype != obj";
    else
      Target.setMCRelaxAll(true);
  }

  {
    formatted_raw_ostream FOS(Out->os());

    // Ask the target to add backend passes as necessary.
    if (Target.addPassesToEmitFile(PM, FOS, FileType, NoVerify)) {
      errs() << argv[0] << ": target does not support generation of this"
             << " file type!\n";
      return 1;
    }

    // Before executing passes, print the final values of the LLVM options.
    cl::PrintOptionValues();

    PM.run(mod);
  }

  // Declare success.
  Out->keep();

  return 0;
}

//.........这里部分代码省略.........
        StandardLinkOpts.getPosition() < PassList.getPosition(i)) {
      AddStandardLinkPasses(Passes);
      StandardLinkOpts = false;
    }

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

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

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

    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) {
      PassKind Kind = P->getPassKind();
      addPass(Passes, P);

      if (AnalyzeOnly) {
        switch (Kind) {
        case PT_BasicBlock:
          Passes.add(new BasicBlockPassPrinter(PassInf, Out->os()));
          break;
        case PT_Loop:
          Passes.add(new LoopPassPrinter(PassInf, Out->os()));
          break;
        case PT_Function:
          Passes.add(new FunctionPassPrinter(PassInf, Out->os()));
          break;
        case PT_CallGraphSCC:
          Passes.add(new CallGraphSCCPassPrinter(PassInf, Out->os()));
          break;
        default:
          Passes.add(new ModulePassPrinter(PassInf, Out->os()));
          break;
        }
      }
    }

    if (PrintEachXForm)
      Passes.add(createPrintModulePass(&errs()));
  }

  // If -std-compile-opts was specified at the end of the pass list, add them.
  if (StandardCompileOpts) {
    AddStandardCompilePasses(Passes);
    StandardCompileOpts = false;
  }

  if (StandardLinkOpts) {
    AddStandardLinkPasses(Passes);
    StandardLinkOpts = false;
  }

  if (OptLevelO1)
    AddOptimizationPasses(Passes, *FPasses, 1);

  if (OptLevelO2)
    AddOptimizationPasses(Passes, *FPasses, 2);

  if (OptLevelO3)
    AddOptimizationPasses(Passes, *FPasses, 3);

  if (OptLevelO1 || OptLevelO2 || OptLevelO3)
    FPasses->run(*M.get());

  // Check that the module is well formed on completion of optimization
  if (!NoVerify && !VerifyEach)
    Passes.add(createVerifierPass());

  // Write bitcode or assembly to the output as the last step...
  if (!NoOutput && !AnalyzeOnly) {
    if (OutputAssembly)
      Passes.add(createPrintModulePass(&Out->os()));
    else
      Passes.add(createBitcodeWriterPass(Out->os()));
  }

  // Now that we have all of the passes ready, run them.
  Passes.run(*M.get());

  // Declare success.
  if (!NoOutput)
    Out->keep();

  return 0;
}

//.........这里部分代码省略.........
                                          RelocModel, CMModel, OLvl));
  assert(target.get() && "Could not allocate target machine!");
  assert(mod && "Should have exited after outputting help!");
  TargetMachine &Target = *target.get();

  if (DisableDotLoc)
    Target.setMCUseLoc(false);

  if (DisableCFI)
    Target.setMCUseCFI(false);

  if (EnableDwarfDirectory)
    Target.setMCUseDwarfDirectory(true);

  if (GenerateSoftFloatCalls)
    FloatABIForCalls = FloatABI::Soft;

  // Disable .loc support for older OS X versions.
  if (TheTriple.isMacOSX() &&
      TheTriple.isMacOSXVersionLT(10, 6))
    Target.setMCUseLoc(false);

  // Figure out where we are going to send the output.
  OwningPtr<tool_output_file> Out
    (GetOutputStream(TheTarget->getName(), TheTriple.getOS(), argv[0]));
  if (!Out) return 1;

  // Build up all of the passes that we want to do to the module.
  PassManager PM;

  // Add an appropriate TargetLibraryInfo pass for the module's triple.
  TargetLibraryInfo *TLI = new TargetLibraryInfo(TheTriple);
  if (DisableSimplifyLibCalls)
    TLI->disableAllFunctions();
  PM.add(TLI);

  if (target.get()) {
    PM.add(createNoTTIPass(target->getScalarTargetTransformInfo(),
                           target->getVectorTargetTransformInfo()));
  }

  // Add the target data from the target machine, if it exists, or the module.
  if (const DataLayout *TD = Target.getDataLayout())
    PM.add(new DataLayout(*TD));
  else
    PM.add(new DataLayout(mod));

  // Override default to generate verbose assembly.
  Target.setAsmVerbosityDefault(true);

  if (RelaxAll) {
    if (FileType != TargetMachine::CGFT_ObjectFile)
      errs() << argv[0]
             << ": warning: ignoring -mc-relax-all because filetype != obj";
    else
      Target.setMCRelaxAll(true);
  }

  {
    formatted_raw_ostream FOS(Out->os());

    AnalysisID StartAfterID = 0;
    AnalysisID StopAfterID = 0;
    const PassRegistry *PR = PassRegistry::getPassRegistry();
    if (!StartAfter.empty()) {
      const PassInfo *PI = PR->getPassInfo(StartAfter);
      if (!PI) {
        errs() << argv[0] << ": start-after pass is not registered.\n";
        return 1;
      }
      StartAfterID = PI->getTypeInfo();
    }
    if (!StopAfter.empty()) {
      const PassInfo *PI = PR->getPassInfo(StopAfter);
      if (!PI) {
        errs() << argv[0] << ": stop-after pass is not registered.\n";
        return 1;
      }
      StopAfterID = PI->getTypeInfo();
    }

    // Ask the target to add backend passes as necessary.
    if (Target.addPassesToEmitFile(PM, FOS, FileType, NoVerify,
                                   StartAfterID, StopAfterID)) {
      errs() << argv[0] << ": target does not support generation of this"
             << " file type!\n";
      return 1;
    }

    // Before executing passes, print the final values of the LLVM options.
    cl::PrintOptionValues();

    PM.run(*mod);
  }

  // Declare success.
  Out->keep();

  return 0;
}

int main(int argc, char **argv) {
  LLVMContext &Context = getGlobalContext();
  llvm_shutdown_obj Y;  // Call llvm_shutdown() on exit.

  cl::ParseCommandLineOptions(argc, argv, "libclc builtin preparation tool\n");

  std::string ErrorMessage;
  std::auto_ptr<Module> M;

  {
    OwningPtr<MemoryBuffer> BufferPtr;
    if (error_code ec = MemoryBuffer::getFileOrSTDIN(InputFilename, BufferPtr))
      ErrorMessage = ec.message();
    else
      M.reset(ParseBitcodeFile(BufferPtr.get(), Context, &ErrorMessage));
  }

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

  // Set linkage of every external definition to linkonce_odr.
  for (Module::iterator i = M->begin(), e = M->end(); i != e; ++i) {
    if (!i->isDeclaration() && i->getLinkage() == GlobalValue::ExternalLinkage) {
      i->setLinkage(GlobalValue::LinkOnceODRLinkage);
      //i->addFnAttr(Attributes::AlwaysInline);
    }
  }

  for (Module::global_iterator i = M->global_begin(), e = M->global_end();
       i != e; ++i) {
    if (!i->isDeclaration() && i->getLinkage() == GlobalValue::ExternalLinkage) {
      i->setLinkage(GlobalValue::LinkOnceAnyLinkage);
    }
  }

  if (OutputFilename.empty()) {
    errs() << "no output file\n";
    return 1;
  }

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

  WriteBitcodeToFile(M.get(), Out->os());

  // Declare success.
  Out->keep();
  return 0;
}

//.........这里部分代码省略.........
      TheTriple.setArch(Type);
  } else {
    std::string Err;
    TheTarget = TargetRegistry::lookupTarget(TheTriple.getTriple(), Err);
    if (TheTarget == 0) {
      errs() << 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();

  if (DisableDotLoc)
    Target.setMCUseLoc(false);
  if (TheTriple.getOS() == Triple::Darwin) {
    switch (TheTriple.getDarwinMajorNumber()) {
    case 7:
    case 8:
    case 9:
      // disable .loc support for older darwin OS.
      Target.setMCUseLoc(false);
      break;
    default:
      break;
    }
  }

  // Figure out where we are going to send the output...
  OwningPtr<tool_output_file> Out
    (GetOutputStream(TheTarget->getName(), TheTriple.getOS(), argv[0]));
  if (!Out) return 1;

  CodeGenOpt::Level OLvl = CodeGenOpt::Default;
  switch (OptLevel) {
  default:
    errs() << 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;
  }

  // Build up all of the passes that we want to do to the module.
  PassManager PM;

  // Add the target data from the target machine, if it exists, or the module.
  if (const TargetData *TD = Target.getTargetData())
    PM.add(new TargetData(*TD));
  else
    PM.add(new TargetData(&mod));

  // Override default to generate verbose assembly.
  Target.setAsmVerbosityDefault(true);

  if (RelaxAll) {
    if (FileType != TargetMachine::CGFT_ObjectFile)
      errs() << argv[0]
             << ": warning: ignoring -mc-relax-all because filetype != obj";
    else
      Target.setMCRelaxAll(true);
  }

  {
    formatted_raw_ostream FOS(Out->os());

    // Ask the target to add backend passes as necessary.
    if (Target.addPassesToEmitFile(PM, FOS, FileType, OLvl, NoVerify)) {
      errs() << argv[0] << ": target does not support generation of this"
             << " file type!\n";
      return 1;
    }

    // Before executing passes, print the final values of the LLVM options.
    cl::PrintOptionValues();

    PM.run(mod);
  }

  // Declare success.
  Out->keep();

  return 0;
}

int
main (int argc, char ** argv)
{
  cl::ParseCommandLineOptions(argc, argv, "llvm system compiler\n");

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

  OwningPtr<tool_output_file> Out;  
  std::string ErrorInfo;
  Out.reset(new tool_output_file(OutputFilename.c_str(), ErrorInfo,
				 sys::fs::F_Binary));

  SMDiagnostic Err;

  std::auto_ptr<Module> M;
  M.reset(ParseIRFile(InputFilename, Err, Context));

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

  if (PreOpt) 
  {
    PassManager Passes;
    Passes.add(createVerifierPass());
    Passes.add(createPromoteMemoryToRegisterPass());
    Passes.add(createDeadInstEliminationPass());
    Passes.run(*M.get());
  }

  if (CSE) {
#ifdef UseC
    LLVMCommonSubexpressionElimination(wrap(M.get()));
#else
    LLVMCommonSubexpressionElimination_Cpp(M.get());
#endif
  }


 if (DumpSummary)
   {
      char filename[1024]; 
      sprintf(filename,"%s.stats",OutputFilename.c_str());
#ifdef UseC
      Summarize(wrap(M.get()),"preGCM",filename);
#else
      Summarize_Cpp(M.get(),"preGCM",filename);
#endif
   }

 if (!NoLICM) {
#ifdef UseC
    LoopInvariantCodeMotion_C(wrap(M.get()));
#else
    LoopInvariantCodeMotion_Cpp(M.get());
#endif

    if (Twice) {
#ifdef UseC
    LoopInvariantCodeMotion_C(wrap(M.get()));
#else
    LoopInvariantCodeMotion_Cpp(M.get());
#endif
    }

  }


 if (DumpSummary)
   {
      char filename[1024]; 
      sprintf(filename,"%s.stats",OutputFilename.c_str());
#ifdef UseC
      Summarize(wrap(M.get()),"postGCM",filename);
#else
      Summarize_Cpp(M.get(),"postGCM",filename);
#endif
   }

  if (PostOpt)
   {
     PassManager Passes;
     Passes.add(createDeadCodeEliminationPass());
     Passes.add(createCFGSimplificationPass()); 
     Passes.run(*M.get());
   }
   
   WriteBitcodeToFile(M.get(),Out->os());
   Out->keep();
   
   return 0;
}

//.........这里部分代码省略.........
  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;
  }

  TargetOptions Options = InitTargetOptionsFromCodeGenFlags();
  Options.DisableIntegratedAS = NoIntegratedAssembler;

  OwningPtr<TargetMachine>
    target(TheTarget->createTargetMachine(TheTriple.getTriple(),
                                          MCPU, FeaturesStr, Options,
                                          RelocModel, CMModel, OLvl));
  assert(target.get() && "Could not allocate target machine!");
  assert(mod && "Should have exited after outputting help!");
  TargetMachine &Target = *target.get();

  if (DisableCFI)
    Target.setMCUseCFI(false);

  if (EnableDwarfDirectory)
    Target.setMCUseDwarfDirectory(true);

  if (GenerateSoftFloatCalls)
    FloatABIForCalls = FloatABI::Soft;

  // Figure out where we are going to send the output.
  OwningPtr<tool_output_file> Out
    (GetOutputStream(TheTarget->getName(), TheTriple.getOS(), argv[0]));
  if (!Out) return 1;

  // Build up all of the passes that we want to do to the module.
  PassManager PM;

  // Add an appropriate TargetLibraryInfo pass for the module's triple.
  TargetLibraryInfo *TLI = new TargetLibraryInfo(TheTriple);
  if (DisableSimplifyLibCalls)
    TLI->disableAllFunctions();
  PM.add(TLI);

  // Add the target data from the target machine, if it exists, or the module.
  if (const DataLayout *DL = Target.getDataLayout())
    PM.add(new DataLayout(*DL));
  else
    PM.add(new DataLayout(mod));

  // Override default to generate verbose assembly.
  Target.setAsmVerbosityDefault(true);

  if (RelaxAll) {
    if (FileType != TargetMachine::CGFT_ObjectFile)
      errs() << argv[0]
             << ": warning: ignoring -mc-relax-all because filetype != obj";
    else
      Target.setMCRelaxAll(true);
  }

  {
    formatted_raw_ostream FOS(Out->os());

    AnalysisID StartAfterID = 0;
    AnalysisID StopAfterID = 0;
    const PassRegistry *PR = PassRegistry::getPassRegistry();
    if (!StartAfter.empty()) {
      const PassInfo *PI = PR->getPassInfo(StartAfter);
      if (!PI) {
        errs() << argv[0] << ": start-after pass is not registered.\n";
        return 1;
      }
      StartAfterID = PI->getTypeInfo();
    }
    if (!StopAfter.empty()) {
      const PassInfo *PI = PR->getPassInfo(StopAfter);
      if (!PI) {
        errs() << argv[0] << ": stop-after pass is not registered.\n";
        return 1;
      }
      StopAfterID = PI->getTypeInfo();
    }

    // Ask the target to add backend passes as necessary.
    if (Target.addPassesToEmitFile(PM, FOS, FileType, NoVerify,
                                   StartAfterID, StopAfterID)) {
      errs() << argv[0] << ": target does not support generation of this"
             << " file type!\n";
      return 1;
    }

    // Before executing passes, print the final values of the LLVM options.
    cl::PrintOptionValues();

    PM.run(*mod);
  }

  // Declare success.
  Out->keep();

  return 0;
}