C++ Compilation::getDefaultToolChain方法代码示例

static unsigned PrintActions1(const Compilation &C,
                              Action *A, 
                              std::map<Action*, unsigned> &Ids) {
  if (Ids.count(A))
    return Ids[A];
  
  std::string str;
  llvm::raw_string_ostream os(str);
  
  os << Action::getClassName(A->getKind()) << ", ";
  if (InputAction *IA = dyn_cast<InputAction>(A)) {    
    os << "\"" << IA->getInputArg().getValue(C.getArgs()) << "\"";
  } else if (BindArchAction *BIA = dyn_cast<BindArchAction>(A)) {
    os << '"' << (BIA->getArchName() ? BIA->getArchName() : 
                  C.getDefaultToolChain().getArchName()) << '"'
       << ", {" << PrintActions1(C, *BIA->begin(), Ids) << "}";
  } else {
    os << "{";
    for (Action::iterator it = A->begin(), ie = A->end(); it != ie;) {
      os << PrintActions1(C, *it, Ids);
      ++it;
      if (it != ie)
        os << ", ";
    }
    os << "}";
  }

  unsigned Id = Ids.size();
  Ids[A] = Id;
  llvm::errs() << Id << ": " << os.str() << ", " 
               << types::getTypeName(A->getType()) << "\n";

  return Id;
}

void Driver::PrintVersion(const Compilation &C, llvm::raw_ostream &OS) const {
  static char buf[] = "$URL: https://llvm.org/svn/llvm-project/cfe/branches/release_26/lib/Driver/Driver.cpp $";
  char *zap = strstr(buf, "/lib/Driver");
  if (zap)
    *zap = 0;
  zap = strstr(buf, "/clang/tools/clang");
  if (zap)
    *zap = 0;
  const char *vers = buf+6;
  // FIXME: Add cmake support and remove #ifdef
#ifdef SVN_REVISION
  const char *revision = SVN_REVISION;
#else
  const char *revision = "";
#endif
  // FIXME: The following handlers should use a callback mechanism, we
  // don't know what the client would like to do.
  OS << "clang version " CLANG_VERSION_STRING " (" 
               << vers << " " << revision << ")" << '\n';

  const ToolChain &TC = C.getDefaultToolChain();
  OS << "Target: " << TC.getTripleString() << '\n';

  // Print the threading model.
  //
  // FIXME: Implement correctly.
  OS << "Thread model: " << "posix" << '\n';
}

void Driver::PrintVersion(const Compilation &C, llvm::raw_ostream &OS) const {
    // FIXME: The following handlers should use a callback mechanism, we don't
    // know what the client would like to do.
    OS << getClangFullVersion() << '\n';
    const ToolChain &TC = C.getDefaultToolChain();
    OS << "Target: " << TC.getTripleString() << '\n';

    // Print the threading model.
    //
    // FIXME: Implement correctly.
    OS << "Thread model: " << "posix" << '\n';
}

void Driver::BuildJobsForAction(Compilation &C,
                                const Action *A,
                                const ToolChain *TC,
                                bool CanAcceptPipe,
                                bool AtTopLevel,
                                const char *LinkingOutput,
                                InputInfo &Result) const {
  llvm::PrettyStackTraceString CrashInfo("Building compilation jobs for action");

  bool UsePipes = C.getArgs().hasArg(options::OPT_pipe);
  // FIXME: Pipes are forcibly disabled until we support executing
  // them.
  if (!CCCPrintBindings)
    UsePipes = false;

  if (const InputAction *IA = dyn_cast<InputAction>(A)) {
    // FIXME: It would be nice to not claim this here; maybe the old
    // scheme of just using Args was better?
    const Arg &Input = IA->getInputArg();
    Input.claim();
    if (isa<PositionalArg>(Input)) {
      const char *Name = Input.getValue(C.getArgs());
      Result = InputInfo(Name, A->getType(), Name);
    } else
      Result = InputInfo(&Input, A->getType(), "");
    return;
  }

  if (const BindArchAction *BAA = dyn_cast<BindArchAction>(A)) {
    const char *ArchName = BAA->getArchName();
    std::string Arch;
    if (!ArchName) {
      Arch = C.getDefaultToolChain().getArchName();
      ArchName = Arch.c_str();
    }
    BuildJobsForAction(C,
                       *BAA->begin(), 
                       Host->getToolChain(C.getArgs(), ArchName),
                       CanAcceptPipe,
                       AtTopLevel,
                       LinkingOutput,
                       Result);
    return;
  }

  const JobAction *JA = cast<JobAction>(A);
  const Tool &T = TC->SelectTool(C, *JA);
  
  // See if we should use an integrated preprocessor. We do so when we
  // have exactly one input, since this is the only use case we care
  // about (irrelevant since we don't support combine yet).
  bool UseIntegratedCPP = false;
  const ActionList *Inputs = &A->getInputs();
  if (Inputs->size() == 1 && isa<PreprocessJobAction>(*Inputs->begin())) {
    if (!C.getArgs().hasArg(options::OPT_no_integrated_cpp) &&
        !C.getArgs().hasArg(options::OPT_traditional_cpp) &&
        !C.getArgs().hasArg(options::OPT_save_temps) &&
        T.hasIntegratedCPP()) {
      UseIntegratedCPP = true;
      Inputs = &(*Inputs)[0]->getInputs();
    }
  }

  // Only use pipes when there is exactly one input.
  bool TryToUsePipeInput = Inputs->size() == 1 && T.acceptsPipedInput();
  InputInfoList InputInfos;
  for (ActionList::const_iterator it = Inputs->begin(), ie = Inputs->end();
       it != ie; ++it) {
    InputInfo II;
    BuildJobsForAction(C, *it, TC, TryToUsePipeInput, 
                       /*AtTopLevel*/false,
                       LinkingOutput,
                       II);
    InputInfos.push_back(II);
  }

  // Determine if we should output to a pipe.
  bool OutputToPipe = false;
  if (CanAcceptPipe && T.canPipeOutput()) {
    // Some actions default to writing to a pipe if they are the top
    // level phase and there was no user override.
    //
    // FIXME: Is there a better way to handle this?
    if (AtTopLevel) {
      if (isa<PreprocessJobAction>(A) && !C.getArgs().hasArg(options::OPT_o))
        OutputToPipe = true;
    } else if (UsePipes)
      OutputToPipe = true;
  }

  // Figure out where to put the job (pipes).
  Job *Dest = &C.getJobs();
  if (InputInfos[0].isPipe()) {
    assert(TryToUsePipeInput && "Unrequested pipe!");
    assert(InputInfos.size() == 1 && "Unexpected pipe with multiple inputs.");
    Dest = &InputInfos[0].getPipe();
  }

  // Always use the first input as the base input.
  const char *BaseInput = InputInfos[0].getBaseInput();
//.........这里部分代码省略.........

void Driver::BuildJobs(Compilation &C) const {
  llvm::PrettyStackTraceString CrashInfo("Building compilation jobs");
  bool SaveTemps = C.getArgs().hasArg(options::OPT_save_temps);
  bool UsePipes = C.getArgs().hasArg(options::OPT_pipe);

  // FIXME: Pipes are forcibly disabled until we support executing
  // them.
  if (!CCCPrintBindings)
    UsePipes = false;
  
  // -save-temps inhibits pipes.
  if (SaveTemps && UsePipes) {
    Diag(clang::diag::warn_drv_pipe_ignored_with_save_temps);
    UsePipes = true;
  }

  Arg *FinalOutput = C.getArgs().getLastArg(options::OPT_o);

  // It is an error to provide a -o option if we are making multiple
  // output files.
  if (FinalOutput) {
    unsigned NumOutputs = 0;
    for (ActionList::const_iterator it = C.getActions().begin(), 
           ie = C.getActions().end(); it != ie; ++it)
      if ((*it)->getType() != types::TY_Nothing)
        ++NumOutputs;
    
    if (NumOutputs > 1) {
      Diag(clang::diag::err_drv_output_argument_with_multiple_files);
      FinalOutput = 0;
    }
  }

  for (ActionList::const_iterator it = C.getActions().begin(), 
         ie = C.getActions().end(); it != ie; ++it) {
    Action *A = *it;

    // If we are linking an image for multiple archs then the linker
    // wants -arch_multiple and -final_output <final image
    // name>. Unfortunately, this doesn't fit in cleanly because we
    // have to pass this information down.
    //
    // FIXME: This is a hack; find a cleaner way to integrate this
    // into the process.
    const char *LinkingOutput = 0;
    if (isa<LipoJobAction>(A)) {
      if (FinalOutput)
        LinkingOutput = FinalOutput->getValue(C.getArgs());
      else
        LinkingOutput = DefaultImageName.c_str();
    }

    InputInfo II;
    BuildJobsForAction(C, A, &C.getDefaultToolChain(), 
                       /*CanAcceptPipe*/ true,
                       /*AtTopLevel*/ true,
                       /*LinkingOutput*/ LinkingOutput,
                       II);
  }

  // If the user passed -Qunused-arguments or there were errors, don't
  // warn about any unused arguments.
  if (Diags.getNumErrors() || 
      C.getArgs().hasArg(options::OPT_Qunused_arguments))
    return;

  // Claim -### here.
  (void) C.getArgs().hasArg(options::OPT__HASH_HASH_HASH);
  
  for (ArgList::const_iterator it = C.getArgs().begin(), ie = C.getArgs().end();
       it != ie; ++it) {
    Arg *A = *it;
      
    // FIXME: It would be nice to be able to send the argument to the
    // Diagnostic, so that extra values, position, and so on could be
    // printed.
    if (!A->isClaimed()) {
      if (A->getOption().hasNoArgumentUnused())
        continue;

      // Suppress the warning automatically if this is just a flag,
      // and it is an instance of an argument we already claimed.
      const Option &Opt = A->getOption();
      if (isa<FlagOption>(Opt)) {
        bool DuplicateClaimed = false;

        // FIXME: Use iterator.
        for (ArgList::const_iterator it = C.getArgs().begin(), 
               ie = C.getArgs().end(); it != ie; ++it) {
          if ((*it)->isClaimed() && (*it)->getOption().matches(Opt.getId())) {
            DuplicateClaimed = true;
            break;
          }
        }

        if (DuplicateClaimed)
          continue;
      }

      Diag(clang::diag::warn_drv_unused_argument) 
//.........这里部分代码省略.........

bool Driver::HandleImmediateArgs(const Compilation &C) {
  // The order these options are handled in in gcc is all over the
  // place, but we don't expect inconsistencies w.r.t. that to matter
  // in practice.

  if (C.getArgs().hasArg(options::OPT_dumpversion)) {
    llvm::outs() << CLANG_VERSION_STRING "\n";
    return false;
  }

  if (C.getArgs().hasArg(options::OPT__help) || 
      C.getArgs().hasArg(options::OPT__help_hidden)) {
    PrintHelp(C.getArgs().hasArg(options::OPT__help_hidden));
    return false;
  }

  if (C.getArgs().hasArg(options::OPT__version)) {
    // Follow gcc behavior and use stdout for --version and stderr for -v
    PrintVersion(C, llvm::outs());
    return false;
  }

  if (C.getArgs().hasArg(options::OPT_v) || 
      C.getArgs().hasArg(options::OPT__HASH_HASH_HASH)) {
    PrintVersion(C, llvm::errs());
    SuppressMissingInputWarning = true;
  }

  const ToolChain &TC = C.getDefaultToolChain();
  if (C.getArgs().hasArg(options::OPT_print_search_dirs)) {
    llvm::outs() << "programs: =";
    for (ToolChain::path_list::const_iterator it = TC.getProgramPaths().begin(),
           ie = TC.getProgramPaths().end(); it != ie; ++it) {
      if (it != TC.getProgramPaths().begin())
        llvm::outs() << ':';
      llvm::outs() << *it;
    }
    llvm::outs() << "\n";
    llvm::outs() << "libraries: =";
    for (ToolChain::path_list::const_iterator it = TC.getFilePaths().begin(), 
           ie = TC.getFilePaths().end(); it != ie; ++it) {
      if (it != TC.getFilePaths().begin())
        llvm::outs() << ':';
      llvm::outs() << *it;
    }
    llvm::outs() << "\n";
    return false;
  }

  // FIXME: The following handlers should use a callback mechanism, we
  // don't know what the client would like to do.
  if (Arg *A = C.getArgs().getLastArg(options::OPT_print_file_name_EQ)) {
    llvm::outs() << GetFilePath(A->getValue(C.getArgs()), TC).toString() 
                 << "\n";
    return false;
  }

  if (Arg *A = C.getArgs().getLastArg(options::OPT_print_prog_name_EQ)) {
    llvm::outs() << GetProgramPath(A->getValue(C.getArgs()), TC).toString() 
                 << "\n";
    return false;
  }

  if (C.getArgs().hasArg(options::OPT_print_libgcc_file_name)) {
    llvm::outs() << GetFilePath("libgcc.a", TC).toString() << "\n";
    return false;
  }

  if (C.getArgs().hasArg(options::OPT_print_multi_lib)) {
    // FIXME: We need tool chain support for this.
    llvm::outs() << ".;\n";

    switch (C.getDefaultToolChain().getTriple().getArch()) {
    default:
      break;
      
    case llvm::Triple::x86_64:
      llvm::outs() << "x86_64;@m64" << "\n";
      break;

    case llvm::Triple::ppc64:
      llvm::outs() << "ppc64;@m64" << "\n";
      break;
    }
    return false;
  }

  // FIXME: What is the difference between print-multi-directory and
  // print-multi-os-directory?
  if (C.getArgs().hasArg(options::OPT_print_multi_directory) ||
      C.getArgs().hasArg(options::OPT_print_multi_os_directory)) {
    switch (C.getDefaultToolChain().getTriple().getArch()) {
    default:
    case llvm::Triple::x86:
    case llvm::Triple::ppc:
      llvm::outs() << "." << "\n";
      break;
      
    case llvm::Triple::x86_64:
      llvm::outs() << "x86_64" << "\n";
//.........这里部分代码省略.........