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

//.........这里部分代码省略.........
                       *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();

  // Determine the place to write output to (nothing, pipe, or
  // filename) and where to put the new job.
  if (JA->getType() == types::TY_Nothing) {
    Result = InputInfo(A->getType(), BaseInput);
  } else if (OutputToPipe) {
    // Append to current piped job or create a new one as appropriate.
    PipedJob *PJ = dyn_cast<PipedJob>(Dest);
    if (!PJ) {
      PJ = new PipedJob();
      // FIXME: Temporary hack so that -ccc-print-bindings work until
      // we have pipe support. Please remove later.
      if (!CCCPrintBindings)
        cast<JobList>(Dest)->addJob(PJ);
      Dest = PJ;
    }
    Result = InputInfo(PJ, A->getType(), BaseInput);
  } else {
    Result = InputInfo(GetNamedOutputPath(C, *JA, BaseInput, AtTopLevel),
                       A->getType(), BaseInput);
  }

  if (CCCPrintBindings) {
    llvm::errs() << "# \"" << T.getToolChain().getTripleString() << '"'
                 << " - \"" << T.getName() << "\", inputs: [";
    for (unsigned i = 0, e = InputInfos.size(); i != e; ++i) {
      llvm::errs() << InputInfos[i].getAsString();
      if (i + 1 != e)
        llvm::errs() << ", ";
    }
    llvm::errs() << "], output: " << Result.getAsString() << "\n";
  } else {
    T.ConstructJob(C, *JA, *Dest, Result, InputInfos, 
                   C.getArgsForToolChain(TC), LinkingOutput);
  }
}