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Editing: Flang.cpp

//===-- Flang.cpp - Flang+LLVM ToolChain Implementations --------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//

#include "Flang.h"
#include "CommonArgs.h"

#include "clang/Driver/Options.h"

#include <cassert>

using namespace clang::driver;
using namespace clang::driver::tools;
using namespace clang;
using namespace llvm::opt;

void Flang::ConstructJob(Compilation &C, const JobAction &JA,
                         const InputInfo &Output, const InputInfoList &Inputs,
                         const ArgList &Args, const char *LinkingOutput) const {
  const auto &TC = getToolChain();
  const llvm::Triple &Triple = TC.getEffectiveTriple();
  const std::string &TripleStr = Triple.getTriple();

ArgStringList CmdArgs;

CmdArgs.push_back("-fc1");

CmdArgs.push_back("-triple");
  CmdArgs.push_back(Args.MakeArgString(TripleStr));

if (isa<PreprocessJobAction>(JA)) {
    CmdArgs.push_back("-E");
  } else if (isa<CompileJobAction>(JA) || isa<BackendJobAction>(JA)) {
    if (JA.getType() == types::TY_Nothing) {
      CmdArgs.push_back("-fsyntax-only");
    } else if (JA.getType() == types::TY_AST) {
      CmdArgs.push_back("-emit-ast");
    } else if (JA.getType() == types::TY_LLVM_IR ||
               JA.getType() == types::TY_LTO_IR) {
      CmdArgs.push_back("-emit-llvm");
    } else if (JA.getType() == types::TY_LLVM_BC ||
               JA.getType() == types::TY_LTO_BC) {
      CmdArgs.push_back("-emit-llvm-bc");
    } else if (JA.getType() == types::TY_PP_Asm) {
      CmdArgs.push_back("-S");
    } else {
      assert(false && "Unexpected output type!");
    }
  } else if (isa<AssembleJobAction>(JA)) {
    CmdArgs.push_back("-emit-obj");
  } else {
    assert(false && "Unexpected action class for Flang tool.");
  }

if (Output.isFilename()) {
    CmdArgs.push_back("-o");
    CmdArgs.push_back(Output.getFilename());
  } else {
    assert(Output.isNothing() && "Invalid output.");
  }

const InputInfo &Input = Inputs[0];
  assert(Input.isFilename() && "Invalid input.");
  CmdArgs.push_back(Input.getFilename());

const auto& D = C.getDriver();
  const char* Exec = Args.MakeArgString(D.GetProgramPath("flang", TC));
  C.addCommand(std::make_unique<Command>(
      JA, *this, ResponseFileSupport::AtFileUTF8(), Exec, CmdArgs, Inputs));
}

Flang::Flang(const ToolChain &TC) : Tool("flang", "flang frontend", TC) {}

Flang::~Flang() {}

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Editing: Flang.cpp

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