Remove LLVM 8.0.1 files.

1 files changed, 0 insertions, 4770 deletions

diff --git a/gnu/llvm/tools/clang/lib/Driver/Driver.cpp b/gnu/llvm/tools/clang/lib/Driver/Driver.cpp
deleted file mode 100644
index a784e218f13..00000000000
--- a/gnu/llvm/tools/clang/lib/Driver/Driver.cpp
+++ /dev/null
@@ -1,4770 +0,0 @@
-//===--- Driver.cpp - Clang GCC Compatible Driver -------------------------===//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-
-#include "clang/Driver/Driver.h"
-#include "InputInfo.h"
-#include "ToolChains/AMDGPU.h"
-#include "ToolChains/AVR.h"
-#include "ToolChains/Ananas.h"
-#include "ToolChains/BareMetal.h"
-#include "ToolChains/Clang.h"
-#include "ToolChains/CloudABI.h"
-#include "ToolChains/Contiki.h"
-#include "ToolChains/CrossWindows.h"
-#include "ToolChains/Cuda.h"
-#include "ToolChains/Darwin.h"
-#include "ToolChains/DragonFly.h"
-#include "ToolChains/FreeBSD.h"
-#include "ToolChains/Fuchsia.h"
-#include "ToolChains/Gnu.h"
-#include "ToolChains/HIP.h"
-#include "ToolChains/Haiku.h"
-#include "ToolChains/Hexagon.h"
-#include "ToolChains/Hurd.h"
-#include "ToolChains/Lanai.h"
-#include "ToolChains/Linux.h"
-#include "ToolChains/MSP430.h"
-#include "ToolChains/MSVC.h"
-#include "ToolChains/MinGW.h"
-#include "ToolChains/Minix.h"
-#include "ToolChains/MipsLinux.h"
-#include "ToolChains/Myriad.h"
-#include "ToolChains/NaCl.h"
-#include "ToolChains/NetBSD.h"
-#include "ToolChains/OpenBSD.h"
-#include "ToolChains/PS4CPU.h"
-#include "ToolChains/RISCVToolchain.h"
-#include "ToolChains/Solaris.h"
-#include "ToolChains/TCE.h"
-#include "ToolChains/WebAssembly.h"
-#include "ToolChains/XCore.h"
-#include "clang/Basic/Version.h"
-#include "clang/Config/config.h"
-#include "clang/Driver/Action.h"
-#include "clang/Driver/Compilation.h"
-#include "clang/Driver/DriverDiagnostic.h"
-#include "clang/Driver/Job.h"
-#include "clang/Driver/Options.h"
-#include "clang/Driver/SanitizerArgs.h"
-#include "clang/Driver/Tool.h"
-#include "clang/Driver/ToolChain.h"
-#include "llvm/ADT/ArrayRef.h"
-#include "llvm/ADT/STLExtras.h"
-#include "llvm/ADT/SmallSet.h"
-#include "llvm/ADT/StringExtras.h"
-#include "llvm/ADT/StringSet.h"
-#include "llvm/ADT/StringSwitch.h"
-#include "llvm/Config/llvm-config.h"
-#include "llvm/Option/Arg.h"
-#include "llvm/Option/ArgList.h"
-#include "llvm/Option/OptSpecifier.h"
-#include "llvm/Option/OptTable.h"
-#include "llvm/Option/Option.h"
-#include "llvm/Support/CommandLine.h"
-#include "llvm/Support/ErrorHandling.h"
-#include "llvm/Support/FileSystem.h"
-#include "llvm/Support/FormatVariadic.h"
-#include "llvm/Support/Path.h"
-#include "llvm/Support/PrettyStackTrace.h"
-#include "llvm/Support/Process.h"
-#include "llvm/Support/Program.h"
-#include "llvm/Support/StringSaver.h"
-#include "llvm/Support/TargetRegistry.h"
-#include "llvm/Support/VirtualFileSystem.h"
-#include "llvm/Support/raw_ostream.h"
-#include <map>
-#include <memory>
-#include <utility>
-#if LLVM_ON_UNIX
-#include <unistd.h> // getpid
-#include <sysexits.h> // EX_IOERR
-#endif
-
-using namespace clang::driver;
-using namespace clang;
-using namespace llvm::opt;
-
-Driver::Driver(StringRef ClangExecutable, StringRef TargetTriple,
-               DiagnosticsEngine &Diags,
-               IntrusiveRefCntPtr<llvm::vfs::FileSystem> VFS)
-    : Opts(createDriverOptTable()), Diags(Diags), VFS(std::move(VFS)),
-      Mode(GCCMode), SaveTemps(SaveTempsNone), BitcodeEmbed(EmbedNone),
-      LTOMode(LTOK_None), ClangExecutable(ClangExecutable),
-      SysRoot(DEFAULT_SYSROOT), DriverTitle("clang LLVM compiler"),
-      CCPrintOptionsFilename(nullptr), CCPrintHeadersFilename(nullptr),
-      CCLogDiagnosticsFilename(nullptr), CCCPrintBindings(false),
-      CCPrintOptions(false), CCPrintHeaders(false), CCLogDiagnostics(false),
-      CCGenDiagnostics(false), TargetTriple(TargetTriple),
-      CCCGenericGCCName(""), Saver(Alloc), CheckInputsExist(true),
-      GenReproducer(false), SuppressMissingInputWarning(false) {
-
-  // Provide a sane fallback if no VFS is specified.
-  if (!this->VFS)
-    this->VFS = llvm::vfs::getRealFileSystem();
-
-  Name = llvm::sys::path::filename(ClangExecutable);
-  Dir = llvm::sys::path::parent_path(ClangExecutable);
-  InstalledDir = Dir; // Provide a sensible default installed dir.
-
-#if defined(CLANG_CONFIG_FILE_SYSTEM_DIR)
-  SystemConfigDir = CLANG_CONFIG_FILE_SYSTEM_DIR;
-#endif
-#if defined(CLANG_CONFIG_FILE_USER_DIR)
-  UserConfigDir = CLANG_CONFIG_FILE_USER_DIR;
-#endif
-
-  // Compute the path to the resource directory.
-  StringRef ClangResourceDir(CLANG_RESOURCE_DIR);
-  SmallString<128> P(Dir);
-  if (ClangResourceDir != "") {
-    llvm::sys::path::append(P, ClangResourceDir);
-  } else {
-    StringRef ClangLibdirSuffix(CLANG_LIBDIR_SUFFIX);
-    P = llvm::sys::path::parent_path(Dir);
-    llvm::sys::path::append(P, Twine("lib") + ClangLibdirSuffix, "clang",
-                            CLANG_VERSION_STRING);
-  }
-  ResourceDir = P.str();
-}
-
-void Driver::ParseDriverMode(StringRef ProgramName,
-                             ArrayRef<const char *> Args) {
-  if (ClangNameParts.isEmpty())
-    ClangNameParts = ToolChain::getTargetAndModeFromProgramName(ProgramName);
-  setDriverModeFromOption(ClangNameParts.DriverMode);
-
-  for (const char *ArgPtr : Args) {
-    // Ignore nullptrs, they are the response file's EOL markers.
-    if (ArgPtr == nullptr)
-      continue;
-    const StringRef Arg = ArgPtr;
-    setDriverModeFromOption(Arg);
-  }
-}
-
-void Driver::setDriverModeFromOption(StringRef Opt) {
-  const std::string OptName =
-      getOpts().getOption(options::OPT_driver_mode).getPrefixedName();
-  if (!Opt.startswith(OptName))
-    return;
-  StringRef Value = Opt.drop_front(OptName.size());
-
-  if (auto M = llvm::StringSwitch<llvm::Optional<DriverMode>>(Value)
-                   .Case("gcc", GCCMode)
-                   .Case("g++", GXXMode)
-                   .Case("cpp", CPPMode)
-                   .Case("cl", CLMode)
-                   .Default(None))
-    Mode = *M;
-  else
-    Diag(diag::err_drv_unsupported_option_argument) << OptName << Value;
-}
-
-InputArgList Driver::ParseArgStrings(ArrayRef<const char *> ArgStrings,
-                                     bool IsClCompatMode,
-                                     bool &ContainsError) {
-  llvm::PrettyStackTraceString CrashInfo("Command line argument parsing");
-  ContainsError = false;
-
-  unsigned IncludedFlagsBitmask;
-  unsigned ExcludedFlagsBitmask;
-  std::tie(IncludedFlagsBitmask, ExcludedFlagsBitmask) =
-      getIncludeExcludeOptionFlagMasks(IsClCompatMode);
-
-  unsigned MissingArgIndex, MissingArgCount;
-  InputArgList Args =
-      getOpts().ParseArgs(ArgStrings, MissingArgIndex, MissingArgCount,
-                          IncludedFlagsBitmask, ExcludedFlagsBitmask);
-
-  // Check for missing argument error.
-  if (MissingArgCount) {
-    Diag(diag::err_drv_missing_argument)
-        << Args.getArgString(MissingArgIndex) << MissingArgCount;
-    ContainsError |=
-        Diags.getDiagnosticLevel(diag::err_drv_missing_argument,
-                                 SourceLocation()) > DiagnosticsEngine::Warning;
-  }
-
-  // Check for unsupported options.
-  for (const Arg *A : Args) {
-    if (A->getOption().hasFlag(options::Unsupported)) {
-      unsigned DiagID;
-      auto ArgString = A->getAsString(Args);
-      std::string Nearest;
-      if (getOpts().findNearest(
-            ArgString, Nearest, IncludedFlagsBitmask,
-            ExcludedFlagsBitmask | options::Unsupported) > 1) {
-        DiagID = diag::err_drv_unsupported_opt;
-        Diag(DiagID) << ArgString;
-      } else {
-        DiagID = diag::err_drv_unsupported_opt_with_suggestion;
-        Diag(DiagID) << ArgString << Nearest;
-      }
-      ContainsError |= Diags.getDiagnosticLevel(DiagID, SourceLocation()) >
-                       DiagnosticsEngine::Warning;
-      continue;
-    }
-
-    // Warn about -mcpu= without an argument.
-    if (A->getOption().matches(options::OPT_mcpu_EQ) && A->containsValue("")) {
-      Diag(diag::warn_drv_empty_joined_argument) << A->getAsString(Args);
-      ContainsError |= Diags.getDiagnosticLevel(
-                           diag::warn_drv_empty_joined_argument,
-                           SourceLocation()) > DiagnosticsEngine::Warning;
-    }
-  }
-
-  for (const Arg *A : Args.filtered(options::OPT_UNKNOWN)) {
-    unsigned DiagID;
-    auto ArgString = A->getAsString(Args);
-    std::string Nearest;
-    if (getOpts().findNearest(
-          ArgString, Nearest, IncludedFlagsBitmask, ExcludedFlagsBitmask) > 1) {
-      DiagID = IsCLMode() ? diag::warn_drv_unknown_argument_clang_cl
-                          : diag::err_drv_unknown_argument;
-      Diags.Report(DiagID) << ArgString;
-    } else {
-      DiagID = IsCLMode() ? diag::warn_drv_unknown_argument_clang_cl_with_suggestion
-                          : diag::err_drv_unknown_argument_with_suggestion;
-      Diags.Report(DiagID) << ArgString << Nearest;
-    }
-    ContainsError |= Diags.getDiagnosticLevel(DiagID, SourceLocation()) >
-                     DiagnosticsEngine::Warning;
-  }
-
-  return Args;
-}
-
-// Determine which compilation mode we are in. We look for options which
-// affect the phase, starting with the earliest phases, and record which
-// option we used to determine the final phase.
-phases::ID Driver::getFinalPhase(const DerivedArgList &DAL,
-                                 Arg **FinalPhaseArg) const {
-  Arg *PhaseArg = nullptr;
-  phases::ID FinalPhase;
-
-  // -{E,EP,P,M,MM} only run the preprocessor.
-  if (CCCIsCPP() || (PhaseArg = DAL.getLastArg(options::OPT_E)) ||
-      (PhaseArg = DAL.getLastArg(options::OPT__SLASH_EP)) ||
-      (PhaseArg = DAL.getLastArg(options::OPT_M, options::OPT_MM)) ||
-      (PhaseArg = DAL.getLastArg(options::OPT__SLASH_P))) {
-    FinalPhase = phases::Preprocess;
-
-    // --precompile only runs up to precompilation.
-  } else if ((PhaseArg = DAL.getLastArg(options::OPT__precompile))) {
-    FinalPhase = phases::Precompile;
-
-    // -{fsyntax-only,-analyze,emit-ast} only run up to the compiler.
-  } else if ((PhaseArg = DAL.getLastArg(options::OPT_fsyntax_only)) ||
-             (PhaseArg = DAL.getLastArg(options::OPT_module_file_info)) ||
-             (PhaseArg = DAL.getLastArg(options::OPT_verify_pch)) ||
-             (PhaseArg = DAL.getLastArg(options::OPT_rewrite_objc)) ||
-             (PhaseArg = DAL.getLastArg(options::OPT_rewrite_legacy_objc)) ||
-             (PhaseArg = DAL.getLastArg(options::OPT__migrate)) ||
-             (PhaseArg = DAL.getLastArg(options::OPT__analyze,
-                                        options::OPT__analyze_auto)) ||
-             (PhaseArg = DAL.getLastArg(options::OPT_emit_ast))) {
-    FinalPhase = phases::Compile;
-
-    // -S only runs up to the backend.
-  } else if ((PhaseArg = DAL.getLastArg(options::OPT_S))) {
-    FinalPhase = phases::Backend;
-
-    // -c compilation only runs up to the assembler.
-  } else if ((PhaseArg = DAL.getLastArg(options::OPT_c))) {
-    FinalPhase = phases::Assemble;
-
-    // Otherwise do everything.
-  } else
-    FinalPhase = phases::Link;
-
-  if (FinalPhaseArg)
-    *FinalPhaseArg = PhaseArg;
-
-  return FinalPhase;
-}
-
-static Arg *MakeInputArg(DerivedArgList &Args, OptTable &Opts,
-                         StringRef Value, bool Claim = true) {
-  Arg *A = new Arg(Opts.getOption(options::OPT_INPUT), Value,
-                   Args.getBaseArgs().MakeIndex(Value), Value.data());
-  Args.AddSynthesizedArg(A);
-  if (Claim)
-    A->claim();
-  return A;
-}
-
-DerivedArgList *Driver::TranslateInputArgs(const InputArgList &Args) const {
-  DerivedArgList *DAL = new DerivedArgList(Args);
-
-  bool HasNostdlib = Args.hasArg(options::OPT_nostdlib);
-  bool HasNostdlibxx = Args.hasArg(options::OPT_nostdlibxx);
-  bool HasNodefaultlib = Args.hasArg(options::OPT_nodefaultlibs);
-  for (Arg *A : Args) {
-    // Unfortunately, we have to parse some forwarding options (-Xassembler,
-    // -Xlinker, -Xpreprocessor) because we either integrate their functionality
-    // (assembler and preprocessor), or bypass a previous driver ('collect2').
-
-    // Rewrite linker options, to replace --no-demangle with a custom internal
-    // option.
-    if ((A->getOption().matches(options::OPT_Wl_COMMA) ||
-         A->getOption().matches(options::OPT_Xlinker)) &&
-        A->containsValue("--no-demangle")) {
-      // Add the rewritten no-demangle argument.
-      DAL->AddFlagArg(A, Opts->getOption(options::OPT_Z_Xlinker__no_demangle));
-
-      // Add the remaining values as Xlinker arguments.
-      for (StringRef Val : A->getValues())
-        if (Val != "--no-demangle")
-          DAL->AddSeparateArg(A, Opts->getOption(options::OPT_Xlinker), Val);
-
-      continue;
-    }
-
-    // Rewrite preprocessor options, to replace -Wp,-MD,FOO which is used by
-    // some build systems. We don't try to be complete here because we don't
-    // care to encourage this usage model.
-    if (A->getOption().matches(options::OPT_Wp_COMMA) &&
-        (A->getValue(0) == StringRef("-MD") ||
-         A->getValue(0) == StringRef("-MMD"))) {
-      // Rewrite to -MD/-MMD along with -MF.
-      if (A->getValue(0) == StringRef("-MD"))
-        DAL->AddFlagArg(A, Opts->getOption(options::OPT_MD));
-      else
-        DAL->AddFlagArg(A, Opts->getOption(options::OPT_MMD));
-      if (A->getNumValues() == 2)
-        DAL->AddSeparateArg(A, Opts->getOption(options::OPT_MF),
-                            A->getValue(1));
-      continue;
-    }
-
-    // Rewrite reserved library names.
-    if (A->getOption().matches(options::OPT_l)) {
-      StringRef Value = A->getValue();
-
-      // Rewrite unless -nostdlib is present.
-      if (!HasNostdlib && !HasNodefaultlib && !HasNostdlibxx &&
-          Value == "stdc++") {
-        DAL->AddFlagArg(A, Opts->getOption(options::OPT_Z_reserved_lib_stdcxx));
-        continue;
-      }
-
-      // Rewrite unconditionally.
-      if (Value == "cc_kext") {
-        DAL->AddFlagArg(A, Opts->getOption(options::OPT_Z_reserved_lib_cckext));
-        continue;
-      }
-    }
-
-    // Pick up inputs via the -- option.
-    if (A->getOption().matches(options::OPT__DASH_DASH)) {
-      A->claim();
-      for (StringRef Val : A->getValues())
-        DAL->append(MakeInputArg(*DAL, *Opts, Val, false));
-      continue;
-    }
-
-    DAL->append(A);
-  }
-
-  // Enforce -static if -miamcu is present.
-  if (Args.hasFlag(options::OPT_miamcu, options::OPT_mno_iamcu, false))
-    DAL->AddFlagArg(0, Opts->getOption(options::OPT_static));
-
-// Add a default value of -mlinker-version=, if one was given and the user
-// didn't specify one.
-#if defined(HOST_LINK_VERSION)
-  if (!Args.hasArg(options::OPT_mlinker_version_EQ) &&
-      strlen(HOST_LINK_VERSION) > 0) {
-    DAL->AddJoinedArg(0, Opts->getOption(options::OPT_mlinker_version_EQ),
-                      HOST_LINK_VERSION);
-    DAL->getLastArg(options::OPT_mlinker_version_EQ)->claim();
-  }
-#endif
-
-  return DAL;
-}
-
-/// Compute target triple from args.
-///
-/// This routine provides the logic to compute a target triple from various
-/// args passed to the driver and the default triple string.
-static llvm::Triple computeTargetTriple(const Driver &D,
-                                        StringRef TargetTriple,
-                                        const ArgList &Args,
-                                        StringRef DarwinArchName = "") {
-  // FIXME: Already done in Compilation *Driver::BuildCompilation
-  if (const Arg *A = Args.getLastArg(options::OPT_target))
-    TargetTriple = A->getValue();
-
-  llvm::Triple Target(llvm::Triple::normalize(TargetTriple));
-
-  // GNU/Hurd's triples should have been -hurd-gnu*, but were historically made
-  // -gnu* only, and we can not change this, so we have to detect that case as
-  // being the Hurd OS.
-  if (TargetTriple.find("-unknown-gnu") != StringRef::npos ||
-      TargetTriple.find("-pc-gnu") != StringRef::npos)
-    Target.setOSName("hurd");
-
-  // Handle Apple-specific options available here.
-  if (Target.isOSBinFormatMachO()) {
-    // If an explicit Darwin arch name is given, that trumps all.
-    if (!DarwinArchName.empty()) {
-      tools::darwin::setTripleTypeForMachOArchName(Target, DarwinArchName);
-      return Target;
-    }
-
-    // Handle the Darwin '-arch' flag.
-    if (Arg *A = Args.getLastArg(options::OPT_arch)) {
-      StringRef ArchName = A->getValue();
-      tools::darwin::setTripleTypeForMachOArchName(Target, ArchName);
-    }
-  }
-
-  // Handle pseudo-target flags '-mlittle-endian'/'-EL' and
-  // '-mbig-endian'/'-EB'.
-  if (Arg *A = Args.getLastArg(options::OPT_mlittle_endian,
-                               options::OPT_mbig_endian)) {
-    if (A->getOption().matches(options::OPT_mlittle_endian)) {
-      llvm::Triple LE = Target.getLittleEndianArchVariant();
-      if (LE.getArch() != llvm::Triple::UnknownArch)
-        Target = std::move(LE);
-    } else {
-      llvm::Triple BE = Target.getBigEndianArchVariant();
-      if (BE.getArch() != llvm::Triple::UnknownArch)
-        Target = std::move(BE);
-    }
-  }
-
-  // Skip further flag support on OSes which don't support '-m32' or '-m64'.
-  if (Target.getArch() == llvm::Triple::tce ||
-      Target.getOS() == llvm::Triple::Minix)
-    return Target;
-
-  // Handle pseudo-target flags '-m64', '-mx32', '-m32' and '-m16'.
-  Arg *A = Args.getLastArg(options::OPT_m64, options::OPT_mx32,
-                           options::OPT_m32, options::OPT_m16);
-  if (A) {
-    llvm::Triple::ArchType AT = llvm::Triple::UnknownArch;
-
-    if (A->getOption().matches(options::OPT_m64)) {
-      AT = Target.get64BitArchVariant().getArch();
-      if (Target.getEnvironment() == llvm::Triple::GNUX32)
-        Target.setEnvironment(llvm::Triple::GNU);
-    } else if (A->getOption().matches(options::OPT_mx32) &&
-               Target.get64BitArchVariant().getArch() == llvm::Triple::x86_64) {
-      AT = llvm::Triple::x86_64;
-      Target.setEnvironment(llvm::Triple::GNUX32);
-    } else if (A->getOption().matches(options::OPT_m32)) {
-      AT = Target.get32BitArchVariant().getArch();
-      if (Target.getEnvironment() == llvm::Triple::GNUX32)
-        Target.setEnvironment(llvm::Triple::GNU);
-    } else if (A->getOption().matches(options::OPT_m16) &&
-               Target.get32BitArchVariant().getArch() == llvm::Triple::x86) {
-      AT = llvm::Triple::x86;
-      Target.setEnvironment(llvm::Triple::CODE16);
-    }
-
-    if (AT != llvm::Triple::UnknownArch && AT != Target.getArch())
-      Target.setArch(AT);
-  }
-
-  // Handle -miamcu flag.
-  if (Args.hasFlag(options::OPT_miamcu, options::OPT_mno_iamcu, false)) {
-    if (Target.get32BitArchVariant().getArch() != llvm::Triple::x86)
-      D.Diag(diag::err_drv_unsupported_opt_for_target) << "-miamcu"
-                                                       << Target.str();
-
-    if (A && !A->getOption().matches(options::OPT_m32))
-      D.Diag(diag::err_drv_argument_not_allowed_with)
-          << "-miamcu" << A->getBaseArg().getAsString(Args);
-
-    Target.setArch(llvm::Triple::x86);
-    Target.setArchName("i586");
-    Target.setEnvironment(llvm::Triple::UnknownEnvironment);
-    Target.setEnvironmentName("");
-    Target.setOS(llvm::Triple::ELFIAMCU);
-    Target.setVendor(llvm::Triple::UnknownVendor);
-    Target.setVendorName("intel");
-  }
-
-  // If target is MIPS adjust the target triple
-  // accordingly to provided ABI name.
-  A = Args.getLastArg(options::OPT_mabi_EQ);
-  if (A && Target.isMIPS()) {
-    StringRef ABIName = A->getValue();
-    if (ABIName == "32") {
-      Target = Target.get32BitArchVariant();
-      if (Target.getEnvironment() == llvm::Triple::GNUABI64 ||
-          Target.getEnvironment() == llvm::Triple::GNUABIN32)
-        Target.setEnvironment(llvm::Triple::GNU);
-    } else if (ABIName == "n32") {
-      Target = Target.get64BitArchVariant();
-      if (Target.getEnvironment() == llvm::Triple::GNU ||
-          Target.getEnvironment() == llvm::Triple::GNUABI64)
-        Target.setEnvironment(llvm::Triple::GNUABIN32);
-    } else if (ABIName == "64") {
-      Target = Target.get64BitArchVariant();
-      if (Target.getEnvironment() == llvm::Triple::GNU ||
-          Target.getEnvironment() == llvm::Triple::GNUABIN32)
-        Target.setEnvironment(llvm::Triple::GNUABI64);
-    }
-  }
-
-  return Target;
-}
-
-// Parse the LTO options and record the type of LTO compilation
-// based on which -f(no-)?lto(=.*)? option occurs last.
-void Driver::setLTOMode(const llvm::opt::ArgList &Args) {
-  LTOMode = LTOK_None;
-  if (!Args.hasFlag(options::OPT_flto, options::OPT_flto_EQ,
-                    options::OPT_fno_lto, false))
-    return;
-
-  StringRef LTOName("full");
-
-  const Arg *A = Args.getLastArg(options::OPT_flto_EQ);
-  if (A)
-    LTOName = A->getValue();
-
-  LTOMode = llvm::StringSwitch<LTOKind>(LTOName)
-                .Case("full", LTOK_Full)
-                .Case("thin", LTOK_Thin)
-                .Default(LTOK_Unknown);
-
-  if (LTOMode == LTOK_Unknown) {
-    assert(A);
-    Diag(diag::err_drv_unsupported_option_argument) << A->getOption().getName()
-                                                    << A->getValue();
-  }
-}
-
-/// Compute the desired OpenMP runtime from the flags provided.
-Driver::OpenMPRuntimeKind Driver::getOpenMPRuntime(const ArgList &Args) const {
-  StringRef RuntimeName(CLANG_DEFAULT_OPENMP_RUNTIME);
-
-  const Arg *A = Args.getLastArg(options::OPT_fopenmp_EQ);
-  if (A)
-    RuntimeName = A->getValue();
-
-  auto RT = llvm::StringSwitch<OpenMPRuntimeKind>(RuntimeName)
-                .Case("libomp", OMPRT_OMP)
-                .Case("libgomp", OMPRT_GOMP)
-                .Case("libiomp5", OMPRT_IOMP5)
-                .Default(OMPRT_Unknown);
-
-  if (RT == OMPRT_Unknown) {
-    if (A)
-      Diag(diag::err_drv_unsupported_option_argument)
-          << A->getOption().getName() << A->getValue();
-    else
-      // FIXME: We could use a nicer diagnostic here.
-      Diag(diag::err_drv_unsupported_opt) << "-fopenmp";
-  }
-
-  return RT;
-}
-
-void Driver::CreateOffloadingDeviceToolChains(Compilation &C,
-                                              InputList &Inputs) {
-
-  //
-  // CUDA/HIP
-  //
-  // We need to generate a CUDA/HIP toolchain if any of the inputs has a CUDA
-  // or HIP type. However, mixed CUDA/HIP compilation is not supported.
-  bool IsCuda =
-      llvm::any_of(Inputs, [](std::pair<types::ID, const llvm::opt::Arg *> &I) {
-        return types::isCuda(I.first);
-      });
-  bool IsHIP =
-      llvm::any_of(Inputs,
-                   [](std::pair<types::ID, const llvm::opt::Arg *> &I) {
-                     return types::isHIP(I.first);
-                   }) ||
-      C.getInputArgs().hasArg(options::OPT_hip_link);
-  if (IsCuda && IsHIP) {
-    Diag(clang::diag::err_drv_mix_cuda_hip);
-    return;
-  }
-  if (IsCuda) {
-    const ToolChain *HostTC = C.getSingleOffloadToolChain<Action::OFK_Host>();
-    const llvm::Triple &HostTriple = HostTC->getTriple();
-    StringRef DeviceTripleStr;
-    auto OFK = Action::OFK_Cuda;
-    DeviceTripleStr =
-        HostTriple.isArch64Bit() ? "nvptx64-nvidia-cuda" : "nvptx-nvidia-cuda";
-    llvm::Triple CudaTriple(DeviceTripleStr);
-    // Use the CUDA and host triples as the key into the ToolChains map,
-    // because the device toolchain we create depends on both.
-    auto &CudaTC = ToolChains[CudaTriple.str() + "/" + HostTriple.str()];
-    if (!CudaTC) {
-      CudaTC = llvm::make_unique<toolchains::CudaToolChain>(
-          *this, CudaTriple, *HostTC, C.getInputArgs(), OFK);
-    }
-    C.addOffloadDeviceToolChain(CudaTC.get(), OFK);
-  } else if (IsHIP) {
-    const ToolChain *HostTC = C.getSingleOffloadToolChain<Action::OFK_Host>();
-    const llvm::Triple &HostTriple = HostTC->getTriple();
-    StringRef DeviceTripleStr;
-    auto OFK = Action::OFK_HIP;
-    DeviceTripleStr = "amdgcn-amd-amdhsa";
-    llvm::Triple HIPTriple(DeviceTripleStr);
-    // Use the HIP and host triples as the key into the ToolChains map,
-    // because the device toolchain we create depends on both.
-    auto &HIPTC = ToolChains[HIPTriple.str() + "/" + HostTriple.str()];
-    if (!HIPTC) {
-      HIPTC = llvm::make_unique<toolchains::HIPToolChain>(
-          *this, HIPTriple, *HostTC, C.getInputArgs());
-    }
-    C.addOffloadDeviceToolChain(HIPTC.get(), OFK);
-  }
-
-  //
-  // OpenMP
-  //
-  // We need to generate an OpenMP toolchain if the user specified targets with
-  // the -fopenmp-targets option.
-  if (Arg *OpenMPTargets =
-          C.getInputArgs().getLastArg(options::OPT_fopenmp_targets_EQ)) {
-    if (OpenMPTargets->getNumValues()) {
-      // We expect that -fopenmp-targets is always used in conjunction with the
-      // option -fopenmp specifying a valid runtime with offloading support,
-      // i.e. libomp or libiomp.
-      bool HasValidOpenMPRuntime = C.getInputArgs().hasFlag(
-          options::OPT_fopenmp, options::OPT_fopenmp_EQ,
-          options::OPT_fno_openmp, false);
-      if (HasValidOpenMPRuntime) {
-        OpenMPRuntimeKind OpenMPKind = getOpenMPRuntime(C.getInputArgs());
-        HasValidOpenMPRuntime =
-            OpenMPKind == OMPRT_OMP || OpenMPKind == OMPRT_IOMP5;
-      }
-
-      if (HasValidOpenMPRuntime) {
-        llvm::StringMap<const char *> FoundNormalizedTriples;
-        for (const char *Val : OpenMPTargets->getValues()) {
-          llvm::Triple TT(Val);
-          std::string NormalizedName = TT.normalize();
-
-          // Make sure we don't have a duplicate triple.
-          auto Duplicate = FoundNormalizedTriples.find(NormalizedName);
-          if (Duplicate != FoundNormalizedTriples.end()) {
-            Diag(clang::diag::warn_drv_omp_offload_target_duplicate)
-                << Val << Duplicate->second;
-            continue;
-          }
-
-          // Store the current triple so that we can check for duplicates in the
-          // following iterations.
-          FoundNormalizedTriples[NormalizedName] = Val;
-
-          // If the specified target is invalid, emit a diagnostic.
-          if (TT.getArch() == llvm::Triple::UnknownArch)
-            Diag(clang::diag::err_drv_invalid_omp_target) << Val;
-          else {
-            const ToolChain *TC;
-            // CUDA toolchains have to be selected differently. They pair host
-            // and device in their implementation.
-            if (TT.isNVPTX()) {
-              const ToolChain *HostTC =
-                  C.getSingleOffloadToolChain<Action::OFK_Host>();
-              assert(HostTC && "Host toolchain should be always defined.");
-              auto &CudaTC =
-                  ToolChains[TT.str() + "/" + HostTC->getTriple().normalize()];
-              if (!CudaTC)
-                CudaTC = llvm::make_unique<toolchains::CudaToolChain>(
-                    *this, TT, *HostTC, C.getInputArgs(), Action::OFK_OpenMP);
-              TC = CudaTC.get();
-            } else
-              TC = &getToolChain(C.getInputArgs(), TT);
-            C.addOffloadDeviceToolChain(TC, Action::OFK_OpenMP);
-          }
-        }
-      } else
-        Diag(clang::diag::err_drv_expecting_fopenmp_with_fopenmp_targets);
-    } else
-      Diag(clang::diag::warn_drv_empty_joined_argument)
-          << OpenMPTargets->getAsString(C.getInputArgs());
-  }
-
-  //
-  // TODO: Add support for other offloading programming models here.
-  //
-}
-
-/// Looks the given directories for the specified file.
-///
-/// \param[out] FilePath File path, if the file was found.
-/// \param[in]  Dirs Directories used for the search.
-/// \param[in]  FileName Name of the file to search for.
-/// \return True if file was found.
-///
-/// Looks for file specified by FileName sequentially in directories specified
-/// by Dirs.
-///
-static bool searchForFile(SmallVectorImpl<char> &FilePath,
-                          ArrayRef<std::string> Dirs,
-                          StringRef FileName) {
-  SmallString<128> WPath;
-  for (const StringRef &Dir : Dirs) {
-    if (Dir.empty())
-      continue;
-    WPath.clear();
-    llvm::sys::path::append(WPath, Dir, FileName);
-    llvm::sys::path::native(WPath);
-    if (llvm::sys::fs::is_regular_file(WPath)) {
-      FilePath = std::move(WPath);
-      return true;
-    }
-  }
-  return false;
-}
-
-bool Driver::readConfigFile(StringRef FileName) {
-  // Try reading the given file.
-  SmallVector<const char *, 32> NewCfgArgs;
-  if (!llvm::cl::readConfigFile(FileName, Saver, NewCfgArgs)) {
-    Diag(diag::err_drv_cannot_read_config_file) << FileName;
-    return true;
-  }
-
-  // Read options from config file.
-  llvm::SmallString<128> CfgFileName(FileName);
-  llvm::sys::path::native(CfgFileName);
-  ConfigFile = CfgFileName.str();
-  bool ContainErrors;
-  CfgOptions = llvm::make_unique<InputArgList>(
-      ParseArgStrings(NewCfgArgs, IsCLMode(), ContainErrors));
-  if (ContainErrors) {
-    CfgOptions.reset();
-    return true;
-  }
-
-  if (CfgOptions->hasArg(options::OPT_config)) {
-    CfgOptions.reset();
-    Diag(diag::err_drv_nested_config_file);
-    return true;
-  }
-
-  // Claim all arguments that come from a configuration file so that the driver
-  // does not warn on any that is unused.
-  for (Arg *A : *CfgOptions)
-    A->claim();
-  return false;
-}
-
-bool Driver::loadConfigFile() {
-  std::string CfgFileName;
-  bool FileSpecifiedExplicitly = false;
-
-  // Process options that change search path for config files.
-  if (CLOptions) {
-    if (CLOptions->hasArg(options::OPT_config_system_dir_EQ)) {
-      SmallString<128> CfgDir;
-      CfgDir.append(
-          CLOptions->getLastArgValue(options::OPT_config_system_dir_EQ));
-      if (!CfgDir.empty()) {
-        if (llvm::sys::fs::make_absolute(CfgDir).value() != 0)
-          SystemConfigDir.clear();
-        else
-          SystemConfigDir = std::string(CfgDir.begin(), CfgDir.end());
-      }
-    }
-    if (CLOptions->hasArg(options::OPT_config_user_dir_EQ)) {
-      SmallString<128> CfgDir;
-      CfgDir.append(
-          CLOptions->getLastArgValue(options::OPT_config_user_dir_EQ));
-      if (!CfgDir.empty()) {
-        if (llvm::sys::fs::make_absolute(CfgDir).value() != 0)
-          UserConfigDir.clear();
-        else
-          UserConfigDir = std::string(CfgDir.begin(), CfgDir.end());
-      }
-    }
-  }
-
-  // First try to find config file specified in command line.
-  if (CLOptions) {
-    std::vector<std::string> ConfigFiles =
-        CLOptions->getAllArgValues(options::OPT_config);
-    if (ConfigFiles.size() > 1) {
-      Diag(diag::err_drv_duplicate_config);
-      return true;
-    }
-
-    if (!ConfigFiles.empty()) {
-      CfgFileName = ConfigFiles.front();
-      assert(!CfgFileName.empty());
-
-      // If argument contains directory separator, treat it as a path to
-      // configuration file.
-      if (llvm::sys::path::has_parent_path(CfgFileName)) {
-        SmallString<128> CfgFilePath;
-        if (llvm::sys::path::is_relative(CfgFileName))
-          llvm::sys::fs::current_path(CfgFilePath);
-        llvm::sys::path::append(CfgFilePath, CfgFileName);
-        if (!llvm::sys::fs::is_regular_file(CfgFilePath)) {
-          Diag(diag::err_drv_config_file_not_exist) << CfgFilePath;
-          return true;
-        }
-        return readConfigFile(CfgFilePath);
-      }
-
-      FileSpecifiedExplicitly = true;
-    }
-  }
-
-  // If config file is not specified explicitly, try to deduce configuration
-  // from executable name. For instance, an executable 'armv7l-clang' will
-  // search for config file 'armv7l-clang.cfg'.
-  if (CfgFileName.empty() && !ClangNameParts.TargetPrefix.empty())
-    CfgFileName = ClangNameParts.TargetPrefix + '-' + ClangNameParts.ModeSuffix;
-
-  if (CfgFileName.empty())
-    return false;
-
-  // Determine architecture part of the file name, if it is present.
-  StringRef CfgFileArch = CfgFileName;
-  size_t ArchPrefixLen = CfgFileArch.find('-');
-  if (ArchPrefixLen == StringRef::npos)
-    ArchPrefixLen = CfgFileArch.size();
-  llvm::Triple CfgTriple;
-  CfgFileArch = CfgFileArch.take_front(ArchPrefixLen);
-  CfgTriple = llvm::Triple(llvm::Triple::normalize(CfgFileArch));
-  if (CfgTriple.getArch() == llvm::Triple::ArchType::UnknownArch)
-    ArchPrefixLen = 0;
-
-  if (!StringRef(CfgFileName).endswith(".cfg"))
-    CfgFileName += ".cfg";
-
-  // If config file starts with architecture name and command line options
-  // redefine architecture (with options like -m32 -LE etc), try finding new
-  // config file with that architecture.
-  SmallString<128> FixedConfigFile;
-  size_t FixedArchPrefixLen = 0;
-  if (ArchPrefixLen) {
-    // Get architecture name from config file name like 'i386.cfg' or
-    // 'armv7l-clang.cfg'.
-    // Check if command line options changes effective triple.
-    llvm::Triple EffectiveTriple = computeTargetTriple(*this,
-                                             CfgTriple.getTriple(), *CLOptions);
-    if (CfgTriple.getArch() != EffectiveTriple.getArch()) {
-      FixedConfigFile = EffectiveTriple.getArchName();
-      FixedArchPrefixLen = FixedConfigFile.size();
-      // Append the rest of original file name so that file name transforms
-      // like: i386-clang.cfg -> x86_64-clang.cfg.
-      if (ArchPrefixLen < CfgFileName.size())
-        FixedConfigFile += CfgFileName.substr(ArchPrefixLen);
-    }
-  }
-
-  // Prepare list of directories where config file is searched for.
-  SmallVector<std::string, 3> CfgFileSearchDirs;
-  CfgFileSearchDirs.push_back(UserConfigDir);
-  CfgFileSearchDirs.push_back(SystemConfigDir);
-  CfgFileSearchDirs.push_back(Dir);
-
-  // Try to find config file. First try file with corrected architecture.
-  llvm::SmallString<128> CfgFilePath;
-  if (!FixedConfigFile.empty()) {
-    if (searchForFile(CfgFilePath, CfgFileSearchDirs, FixedConfigFile))
-      return readConfigFile(CfgFilePath);
-    // If 'x86_64-clang.cfg' was not found, try 'x86_64.cfg'.
-    FixedConfigFile.resize(FixedArchPrefixLen);
-    FixedConfigFile.append(".cfg");
-    if (searchForFile(CfgFilePath, CfgFileSearchDirs, FixedConfigFile))
-      return readConfigFile(CfgFilePath);
-  }
-
-  // Then try original file name.
-  if (searchForFile(CfgFilePath, CfgFileSearchDirs, CfgFileName))
-    return readConfigFile(CfgFilePath);
-
-  // Finally try removing driver mode part: 'x86_64-clang.cfg' -> 'x86_64.cfg'.
-  if (!ClangNameParts.ModeSuffix.empty() &&
-      !ClangNameParts.TargetPrefix.empty()) {
-    CfgFileName.assign(ClangNameParts.TargetPrefix);
-    CfgFileName.append(".cfg");
-    if (searchForFile(CfgFilePath, CfgFileSearchDirs, CfgFileName))
-      return readConfigFile(CfgFilePath);
-  }
-
-  // Report error but only if config file was specified explicitly, by option
-  // --config. If it was deduced from executable name, it is not an error.
-  if (FileSpecifiedExplicitly) {
-    Diag(diag::err_drv_config_file_not_found) << CfgFileName;
-    for (const std::string &SearchDir : CfgFileSearchDirs)
-      if (!SearchDir.empty())
-        Diag(diag::note_drv_config_file_searched_in) << SearchDir;
-    return true;
-  }
-
-  return false;
-}
-
-Compilation *Driver::BuildCompilation(ArrayRef<const char *> ArgList) {
-  llvm::PrettyStackTraceString CrashInfo("Compilation construction");
-
-  // FIXME: Handle environment options which affect driver behavior, somewhere
-  // (client?). GCC_EXEC_PREFIX, LPATH, CC_PRINT_OPTIONS.
-
-  if (Optional<std::string> CompilerPathValue =
-          llvm::sys::Process::GetEnv("COMPILER_PATH")) {
-    StringRef CompilerPath = *CompilerPathValue;
-    while (!CompilerPath.empty()) {
-      std::pair<StringRef, StringRef> Split =
-          CompilerPath.split(llvm::sys::EnvPathSeparator);
-      PrefixDirs.push_back(Split.first);
-      CompilerPath = Split.second;
-    }
-  }
-
-  // We look for the driver mode option early, because the mode can affect
-  // how other options are parsed.
-  ParseDriverMode(ClangExecutable, ArgList.slice(1));
-
-  // FIXME: What are we going to do with -V and -b?
-
-  // Arguments specified in command line.
-  bool ContainsError;
-  CLOptions = llvm::make_unique<InputArgList>(
-      ParseArgStrings(ArgList.slice(1), IsCLMode(), ContainsError));
-
-  // Try parsing configuration file.
-  if (!ContainsError)
-    ContainsError = loadConfigFile();
-  bool HasConfigFile = !ContainsError && (CfgOptions.get() != nullptr);
-
-  // All arguments, from both config file and command line.
-  InputArgList Args = std::move(HasConfigFile ? std::move(*CfgOptions)
-                                              : std::move(*CLOptions));
-
-  auto appendOneArg = [&Args](const Arg *Opt, const Arg *BaseArg) {
-      unsigned Index = Args.MakeIndex(Opt->getSpelling());
-      Arg *Copy = new llvm::opt::Arg(Opt->getOption(), Opt->getSpelling(),
-                                     Index, BaseArg);
-      Copy->getValues() = Opt->getValues();
-      if (Opt->isClaimed())
-        Copy->claim();
-      Args.append(Copy);
-  };
-
-  if (HasConfigFile)
-    for (auto *Opt : *CLOptions) {
-      if (Opt->getOption().matches(options::OPT_config))
-        continue;
-      const Arg *BaseArg = &Opt->getBaseArg();
-      if (BaseArg == Opt)
-        BaseArg = nullptr;
-      appendOneArg(Opt, BaseArg);
-    }
-
-  // In CL mode, look for any pass-through arguments
-  if (IsCLMode() && !ContainsError) {
-    SmallVector<const char *, 16> CLModePassThroughArgList;
-    for (const auto *A : Args.filtered(options::OPT__SLASH_clang)) {
-      A->claim();
-      CLModePassThroughArgList.push_back(A->getValue());
-    }
-
-    if (!CLModePassThroughArgList.empty()) {
-      // Parse any pass through args using default clang processing rather
-      // than clang-cl processing.
-      auto CLModePassThroughOptions = llvm::make_unique<InputArgList>(
-          ParseArgStrings(CLModePassThroughArgList, false, ContainsError));
-
-      if (!ContainsError)
-        for (auto *Opt : *CLModePassThroughOptions) {
-          appendOneArg(Opt, nullptr);
-        }
-    }
-  }
-
-  // FIXME: This stuff needs to go into the Compilation, not the driver.
-  bool CCCPrintPhases;
-
-  // Silence driver warnings if requested
-  Diags.setIgnoreAllWarnings(Args.hasArg(options::OPT_w));
-
-  // -no-canonical-prefixes is used very early in main.
-  Args.ClaimAllArgs(options::OPT_no_canonical_prefixes);
-
-  // Ignore -pipe.
-  Args.ClaimAllArgs(options::OPT_pipe);
-
-  // Extract -ccc args.
-  //
-  // FIXME: We need to figure out where this behavior should live. Most of it
-  // should be outside in the client; the parts that aren't should have proper
-  // options, either by introducing new ones or by overloading gcc ones like -V
-  // or -b.
-  CCCPrintPhases = Args.hasArg(options::OPT_ccc_print_phases);
-  CCCPrintBindings = Args.hasArg(options::OPT_ccc_print_bindings);
-  if (const Arg *A = Args.getLastArg(options::OPT_ccc_gcc_name))
-    CCCGenericGCCName = A->getValue();
-  GenReproducer = Args.hasFlag(options::OPT_gen_reproducer,
-                               options::OPT_fno_crash_diagnostics,
-                               !!::getenv("FORCE_CLANG_DIAGNOSTICS_CRASH"));
-  // FIXME: TargetTriple is used by the target-prefixed calls to as/ld
-  // and getToolChain is const.
-  if (IsCLMode()) {
-    // clang-cl targets MSVC-style Win32.
-    llvm::Triple T(TargetTriple);
-    T.setOS(llvm::Triple::Win32);
-    T.setVendor(llvm::Triple::PC);
-    T.setEnvironment(llvm::Triple::MSVC);
-    T.setObjectFormat(llvm::Triple::COFF);
-    TargetTriple = T.str();
-  }
-  if (const Arg *A = Args.getLastArg(options::OPT_target))
-    TargetTriple = A->getValue();
-  if (const Arg *A = Args.getLastArg(options::OPT_ccc_install_dir))
-    Dir = InstalledDir = A->getValue();
-  for (const Arg *A : Args.filtered(options::OPT_B)) {
-    A->claim();
-    PrefixDirs.push_back(A->getValue(0));
-  }
-  if (const Arg *A = Args.getLastArg(options::OPT__sysroot_EQ))
-    SysRoot = A->getValue();
-  if (const Arg *A = Args.getLastArg(options::OPT__dyld_prefix_EQ))
-    DyldPrefix = A->getValue();
-
-  if (const Arg *A = Args.getLastArg(options::OPT_resource_dir))
-    ResourceDir = A->getValue();
-
-  if (const Arg *A = Args.getLastArg(options::OPT_save_temps_EQ)) {
-    SaveTemps = llvm::StringSwitch<SaveTempsMode>(A->getValue())
-                    .Case("cwd", SaveTempsCwd)
-                    .Case("obj", SaveTempsObj)
-                    .Default(SaveTempsCwd);
-  }
-
-  setLTOMode(Args);
-
-  // Process -fembed-bitcode= flags.
-  if (Arg *A = Args.getLastArg(options::OPT_fembed_bitcode_EQ)) {
-    StringRef Name = A->getValue();
-    unsigned Model = llvm::StringSwitch<unsigned>(Name)
-        .Case("off", EmbedNone)
-        .Case("all", EmbedBitcode)
-        .Case("bitcode", EmbedBitcode)
-        .Case("marker", EmbedMarker)
-        .Default(~0U);
-    if (Model == ~0U) {
-      Diags.Report(diag::err_drv_invalid_value) << A->getAsString(Args)
-                                                << Name;
-    } else
-      BitcodeEmbed = static_cast<BitcodeEmbedMode>(Model);
-  }
-
-  std::unique_ptr<llvm::opt::InputArgList> UArgs =
-      llvm::make_unique<InputArgList>(std::move(Args));
-
-  // Perform the default argument translations.
-  DerivedArgList *TranslatedArgs = TranslateInputArgs(*UArgs);
-
-  // Owned by the host.
-  const ToolChain &TC = getToolChain(
-      *UArgs, computeTargetTriple(*this, TargetTriple, *UArgs));
-
-  // The compilation takes ownership of Args.
-  Compilation *C = new Compilation(*this, TC, UArgs.release(), TranslatedArgs,
-                                   ContainsError);
-
-  if (!HandleImmediateArgs(*C))
-    return C;
-
-  // Construct the list of inputs.
-  InputList Inputs;
-  BuildInputs(C->getDefaultToolChain(), *TranslatedArgs, Inputs);
-
-  // Populate the tool chains for the offloading devices, if any.
-  CreateOffloadingDeviceToolChains(*C, Inputs);
-
-  // Construct the list of abstract actions to perform for this compilation. On
-  // MachO targets this uses the driver-driver and universal actions.
-  if (TC.getTriple().isOSBinFormatMachO())
-    BuildUniversalActions(*C, C->getDefaultToolChain(), Inputs);
-  else
-    BuildActions(*C, C->getArgs(), Inputs, C->getActions());
-
-  if (CCCPrintPhases) {
-    PrintActions(*C);
-    return C;
-  }
-
-  BuildJobs(*C);
-
-  return C;
-}
-
-static void printArgList(raw_ostream &OS, const llvm::opt::ArgList &Args) {
-  llvm::opt::ArgStringList ASL;
-  for (const auto *A : Args)
-    A->render(Args, ASL);
-
-  for (auto I = ASL.begin(), E = ASL.end(); I != E; ++I) {
-    if (I != ASL.begin())
-      OS << ' ';
-    Command::printArg(OS, *I, true);
-  }
-  OS << '\n';
-}
-
-bool Driver::getCrashDiagnosticFile(StringRef ReproCrashFilename,
-                                    SmallString<128> &CrashDiagDir) {
-  using namespace llvm::sys;
-  assert(llvm::Triple(llvm::sys::getProcessTriple()).isOSDarwin() &&
-         "Only knows about .crash files on Darwin");
-
-  // The .crash file can be found on at ~/Library/Logs/DiagnosticReports/
-  // (or /Library/Logs/DiagnosticReports for root) and has the filename pattern
-  // clang-<VERSION>_<YYYY-MM-DD-HHMMSS>_<hostname>.crash.
-  path::home_directory(CrashDiagDir);
-  if (CrashDiagDir.startswith("/var/root"))
-    CrashDiagDir = "/";
-  path::append(CrashDiagDir, "Library/Logs/DiagnosticReports");
-  int PID =
-#if LLVM_ON_UNIX
-      getpid();
-#else
-      0;
-#endif
-  std::error_code EC;
-  fs::file_status FileStatus;
-  TimePoint<> LastAccessTime;
-  SmallString<128> CrashFilePath;
-  // Lookup the .crash files and get the one generated by a subprocess spawned
-  // by this driver invocation.
-  for (fs::directory_iterator File(CrashDiagDir, EC), FileEnd;
-       File != FileEnd && !EC; File.increment(EC)) {
-    StringRef FileName = path::filename(File->path());
-    if (!FileName.startswith(Name))
-      continue;
-    if (fs::status(File->path(), FileStatus))
-      continue;
-    llvm::ErrorOr<std::unique_ptr<llvm::MemoryBuffer>> CrashFile =
-        llvm::MemoryBuffer::getFile(File->path());
-    if (!CrashFile)
-      continue;
-    // The first line should start with "Process:", otherwise this isn't a real
-    // .crash file.
-    StringRef Data = CrashFile.get()->getBuffer();
-    if (!Data.startswith("Process:"))
-      continue;
-    // Parse parent process pid line, e.g: "Parent Process: clang-4.0 [79141]"
-    size_t ParentProcPos = Data.find("Parent Process:");
-    if (ParentProcPos == StringRef::npos)
-      continue;
-    size_t LineEnd = Data.find_first_of("\n", ParentProcPos);
-    if (LineEnd == StringRef::npos)
-      continue;
-    StringRef ParentProcess = Data.slice(ParentProcPos+15, LineEnd).trim();
-    int OpenBracket = -1, CloseBracket = -1;
-    for (size_t i = 0, e = ParentProcess.size(); i < e; ++i) {
-      if (ParentProcess[i] == '[')
-        OpenBracket = i;
-      if (ParentProcess[i] == ']')
-        CloseBracket = i;
-    }
-    // Extract the parent process PID from the .crash file and check whether
-    // it matches this driver invocation pid.
-    int CrashPID;
-    if (OpenBracket < 0 || CloseBracket < 0 ||
-        ParentProcess.slice(OpenBracket + 1, CloseBracket)
-            .getAsInteger(10, CrashPID) || CrashPID != PID) {
-      continue;
-    }
-
-    // Found a .crash file matching the driver pid. To avoid getting an older
-    // and misleading crash file, continue looking for the most recent.
-    // FIXME: the driver can dispatch multiple cc1 invocations, leading to
-    // multiple crashes poiting to the same parent process. Since the driver
-    // does not collect pid information for the dispatched invocation there's
-    // currently no way to distinguish among them.
-    const auto FileAccessTime = FileStatus.getLastModificationTime();
-    if (FileAccessTime > LastAccessTime) {
-      CrashFilePath.assign(File->path());
-      LastAccessTime = FileAccessTime;
-    }
-  }
-
-  // If found, copy it over to the location of other reproducer files.
-  if (!CrashFilePath.empty()) {
-    EC = fs::copy_file(CrashFilePath, ReproCrashFilename);
-    if (EC)
-      return false;
-    return true;
-  }
-
-  return false;
-}
-
-// When clang crashes, produce diagnostic information including the fully
-// preprocessed source file(s).  Request that the developer attach the
-// diagnostic information to a bug report.
-void Driver::generateCompilationDiagnostics(
-    Compilation &C, const Command &FailingCommand,
-    StringRef AdditionalInformation, CompilationDiagnosticReport *Report) {
-  if (C.getArgs().hasArg(options::OPT_fno_crash_diagnostics))
-    return;
-
-  // Don't try to generate diagnostics for link or dsymutil jobs.
-  if (FailingCommand.getCreator().isLinkJob() ||
-      FailingCommand.getCreator().isDsymutilJob())
-    return;
-
-  // Print the version of the compiler.
-  PrintVersion(C, llvm::errs());
-
-  Diag(clang::diag::note_drv_command_failed_diag_msg)
-      << "PLEASE submit a bug report to " BUG_REPORT_URL " and include the "
-         "crash backtrace, preprocessed source, and associated run script.";
-
-  // Suppress driver output and emit preprocessor output to temp file.
-  Mode = CPPMode;
-  CCGenDiagnostics = true;
-
-  // Save the original job command(s).
-  Command Cmd = FailingCommand;
-
-  // Keep track of whether we produce any errors while trying to produce
-  // preprocessed sources.
-  DiagnosticErrorTrap Trap(Diags);
-
-  // Suppress tool output.
-  C.initCompilationForDiagnostics();
-
-  // Construct the list of inputs.
-  InputList Inputs;
-  BuildInputs(C.getDefaultToolChain(), C.getArgs(), Inputs);
-
-  for (InputList::iterator it = Inputs.begin(), ie = Inputs.end(); it != ie;) {
-    bool IgnoreInput = false;
-
-    // Ignore input from stdin or any inputs that cannot be preprocessed.
-    // Check type first as not all linker inputs have a value.
-    if (types::getPreprocessedType(it->first) == types::TY_INVALID) {
-      IgnoreInput = true;
-    } else if (!strcmp(it->second->getValue(), "-")) {
-      Diag(clang::diag::note_drv_command_failed_diag_msg)
-          << "Error generating preprocessed source(s) - "
-             "ignoring input from stdin.";
-      IgnoreInput = true;
-    }
-
-    if (IgnoreInput) {
-      it = Inputs.erase(it);
-      ie = Inputs.end();
-    } else {
-      ++it;
-    }
-  }
-
-  if (Inputs.empty()) {
-    Diag(clang::diag::note_drv_command_failed_diag_msg)
-        << "Error generating preprocessed source(s) - "
-           "no preprocessable inputs.";
-    return;
-  }
-
-  // Don't attempt to generate preprocessed files if multiple -arch options are
-  // used, unless they're all duplicates.
-  llvm::StringSet<> ArchNames;
-  for (const Arg *A : C.getArgs()) {
-    if (A->getOption().matches(options::OPT_arch)) {
-      StringRef ArchName = A->getValue();
-      ArchNames.insert(ArchName);
-    }
-  }
-  if (ArchNames.size() > 1) {
-    Diag(clang::diag::note_drv_command_failed_diag_msg)
-        << "Error generating preprocessed source(s) - cannot generate "
-           "preprocessed source with multiple -arch options.";
-    return;
-  }
-
-  // Construct the list of abstract actions to perform for this compilation. On
-  // Darwin OSes this uses the driver-driver and builds universal actions.
-  const ToolChain &TC = C.getDefaultToolChain();
-  if (TC.getTriple().isOSBinFormatMachO())
-    BuildUniversalActions(C, TC, Inputs);
-  else
-    BuildActions(C, C.getArgs(), Inputs, C.getActions());
-
-  BuildJobs(C);
-
-  // If there were errors building the compilation, quit now.
-  if (Trap.hasErrorOccurred()) {
-    Diag(clang::diag::note_drv_command_failed_diag_msg)
-        << "Error generating preprocessed source(s).";
-    return;
-  }
-
-  // Generate preprocessed output.
-  SmallVector<std::pair<int, const Command *>, 4> FailingCommands;
-  C.ExecuteJobs(C.getJobs(), FailingCommands);
-
-  // If any of the preprocessing commands failed, clean up and exit.
-  if (!FailingCommands.empty()) {
-    Diag(clang::diag::note_drv_command_failed_diag_msg)
-        << "Error generating preprocessed source(s).";
-    return;
-  }
-
-  const ArgStringList &TempFiles = C.getTempFiles();
-  if (TempFiles.empty()) {
-    Diag(clang::diag::note_drv_command_failed_diag_msg)
-        << "Error generating preprocessed source(s).";
-    return;
-  }
-
-  Diag(clang::diag::note_drv_command_failed_diag_msg)
-      << "\n********************\n\n"
-         "PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT:\n"
-         "Preprocessed source(s) and associated run script(s) are located at:";
-
-  SmallString<128> VFS;
-  SmallString<128> ReproCrashFilename;
-  for (const char *TempFile : TempFiles) {
-    Diag(clang::diag::note_drv_command_failed_diag_msg) << TempFile;
-    if (Report)
-      Report->TemporaryFiles.push_back(TempFile);
-    if (ReproCrashFilename.empty()) {
-      ReproCrashFilename = TempFile;
-      llvm::sys::path::replace_extension(ReproCrashFilename, ".crash");
-    }
-    if (StringRef(TempFile).endswith(".cache")) {
-      // In some cases (modules) we'll dump extra data to help with reproducing
-      // the crash into a directory next to the output.
-      VFS = llvm::sys::path::filename(TempFile);
-      llvm::sys::path::append(VFS, "vfs", "vfs.yaml");
-    }
-  }
-
-  // Assume associated files are based off of the first temporary file.
-  CrashReportInfo CrashInfo(TempFiles[0], VFS);
-
-  llvm::SmallString<128> Script(CrashInfo.Filename);
-  llvm::sys::path::replace_extension(Script, "sh");
-  std::error_code EC;
-  llvm::raw_fd_ostream ScriptOS(Script, EC, llvm::sys::fs::CD_CreateNew);
-  if (EC) {
-    Diag(clang::diag::note_drv_command_failed_diag_msg)
-        << "Error generating run script: " << Script << " " << EC.message();
-  } else {
-    ScriptOS << "# Crash reproducer for " << getClangFullVersion() << "\n"
-             << "# Driver args: ";
-    printArgList(ScriptOS, C.getInputArgs());
-    ScriptOS << "# Original command: ";
-    Cmd.Print(ScriptOS, "\n", /*Quote=*/true);
-    Cmd.Print(ScriptOS, "\n", /*Quote=*/true, &CrashInfo);
-    if (!AdditionalInformation.empty())
-      ScriptOS << "\n# Additional information: " << AdditionalInformation
-               << "\n";
-    if (Report)
-      Report->TemporaryFiles.push_back(Script.str());
-    Diag(clang::diag::note_drv_command_failed_diag_msg) << Script;
-  }
-
-  // On darwin, provide information about the .crash diagnostic report.
-  if (llvm::Triple(llvm::sys::getProcessTriple()).isOSDarwin()) {
-    SmallString<128> CrashDiagDir;
-    if (getCrashDiagnosticFile(ReproCrashFilename, CrashDiagDir)) {
-      Diag(clang::diag::note_drv_command_failed_diag_msg)
-          << ReproCrashFilename.str();
-    } else { // Suggest a directory for the user to look for .crash files.
-      llvm::sys::path::append(CrashDiagDir, Name);
-      CrashDiagDir += "_<YYYY-MM-DD-HHMMSS>_<hostname>.crash";
-      Diag(clang::diag::note_drv_command_failed_diag_msg)
-          << "Crash backtrace is located in";
-      Diag(clang::diag::note_drv_command_failed_diag_msg)
-          << CrashDiagDir.str();
-      Diag(clang::diag::note_drv_command_failed_diag_msg)
-          << "(choose the .crash file that corresponds to your crash)";
-    }
-  }
-
-  for (const auto &A : C.getArgs().filtered(options::OPT_frewrite_map_file,
-                                            options::OPT_frewrite_map_file_EQ))
-    Diag(clang::diag::note_drv_command_failed_diag_msg) << A->getValue();
-
-  Diag(clang::diag::note_drv_command_failed_diag_msg)
-      << "\n\n********************";
-}
-
-void Driver::setUpResponseFiles(Compilation &C, Command &Cmd) {
-  // Since commandLineFitsWithinSystemLimits() may underestimate system's capacity
-  // if the tool does not support response files, there is a chance/ that things
-  // will just work without a response file, so we silently just skip it.
-  if (Cmd.getCreator().getResponseFilesSupport() == Tool::RF_None ||
-      llvm::sys::commandLineFitsWithinSystemLimits(Cmd.getExecutable(), Cmd.getArguments()))
-    return;
-
-  std::string TmpName = GetTemporaryPath("response", "txt");
-  Cmd.setResponseFile(C.addTempFile(C.getArgs().MakeArgString(TmpName)));
-}
-
-int Driver::ExecuteCompilation(
-    Compilation &C,
-    SmallVectorImpl<std::pair<int, const Command *>> &FailingCommands) {
-  // Just print if -### was present.
-  if (C.getArgs().hasArg(options::OPT__HASH_HASH_HASH)) {
-    C.getJobs().Print(llvm::errs(), "\n", true);
-    return 0;
-  }
-
-  // If there were errors building the compilation, quit now.
-  if (Diags.hasErrorOccurred())
-    return 1;
-
-  // Set up response file names for each command, if necessary
-  for (auto &Job : C.getJobs())
-    setUpResponseFiles(C, Job);
-
-  C.ExecuteJobs(C.getJobs(), FailingCommands);
-
-  // If the command succeeded, we are done.
-  if (FailingCommands.empty())
-    return 0;
-
-  // Otherwise, remove result files and print extra information about abnormal
-  // failures.
-  int Res = 0;
-  for (const auto &CmdPair : FailingCommands) {
-    int CommandRes = CmdPair.first;
-    const Command *FailingCommand = CmdPair.second;
-
-    // Remove result files if we're not saving temps.
-    if (!isSaveTempsEnabled()) {
-      const JobAction *JA = cast<JobAction>(&FailingCommand->getSource());
-      C.CleanupFileMap(C.getResultFiles(), JA, true);
-
-      // Failure result files are valid unless we crashed.
-      if (CommandRes < 0)
-        C.CleanupFileMap(C.getFailureResultFiles(), JA, true);
-    }
-
-#if LLVM_ON_UNIX
-    // llvm/lib/Support/Unix/Signals.inc will exit with a special return code
-    // for SIGPIPE. Do not print diagnostics for this case.
-    if (CommandRes == EX_IOERR) {
-      Res = CommandRes;
-      continue;
-    }
-#endif
-
-    // Print extra information about abnormal failures, if possible.
-    //
-    // This is ad-hoc, but we don't want to be excessively noisy. If the result
-    // status was 1, assume the command failed normally. In particular, if it
-    // was the compiler then assume it gave a reasonable error code. Failures
-    // in other tools are less common, and they generally have worse
-    // diagnostics, so always print the diagnostic there.
-    const Tool &FailingTool = FailingCommand->getCreator();
-
-    if (!FailingCommand->getCreator().hasGoodDiagnostics() || CommandRes != 1) {
-      // FIXME: See FIXME above regarding result code interpretation.
-      if (CommandRes < 0)
-        Diag(clang::diag::err_drv_command_signalled)
-            << FailingTool.getShortName();
-      else
-        Diag(clang::diag::err_drv_command_failed)
-            << FailingTool.getShortName() << CommandRes;
-    }
-  }
-  return Res;
-}
-
-void Driver::PrintHelp(bool ShowHidden) const {
-  unsigned IncludedFlagsBitmask;
-  unsigned ExcludedFlagsBitmask;
-  std::tie(IncludedFlagsBitmask, ExcludedFlagsBitmask) =
-      getIncludeExcludeOptionFlagMasks(IsCLMode());
-
-  ExcludedFlagsBitmask |= options::NoDriverOption;
-  if (!ShowHidden)
-    ExcludedFlagsBitmask |= HelpHidden;
-
-  std::string Usage = llvm::formatv("{0} [options] file...", Name).str();
-  getOpts().PrintHelp(llvm::outs(), Usage.c_str(), DriverTitle.c_str(),
-                      IncludedFlagsBitmask, ExcludedFlagsBitmask,
-                      /*ShowAllAliases=*/false);
-}
-
-void Driver::PrintVersion(const Compilation &C, 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.
-  if (Arg *A = C.getArgs().getLastArg(options::OPT_mthread_model)) {
-    // Don't print if the ToolChain would have barfed on it already
-    if (TC.isThreadModelSupported(A->getValue()))
-      OS << "Thread model: " << A->getValue();
-  } else
-    OS << "Thread model: " << TC.getThreadModel();
-  OS << '\n';
-
-  // Print out the install directory.
-  OS << "InstalledDir: " << InstalledDir << '\n';
-
-  // If configuration file was used, print its path.
-  if (!ConfigFile.empty())
-    OS << "Configuration file: " << ConfigFile << '\n';
-}
-
-/// PrintDiagnosticCategories - Implement the --print-diagnostic-categories
-/// option.
-static void PrintDiagnosticCategories(raw_ostream &OS) {
-  // Skip the empty category.
-  for (unsigned i = 1, max = DiagnosticIDs::getNumberOfCategories(); i != max;
-       ++i)
-    OS << i << ',' << DiagnosticIDs::getCategoryNameFromID(i) << '\n';
-}
-
-void Driver::HandleAutocompletions(StringRef PassedFlags) const {
-  if (PassedFlags == "")
-    return;
-  // Print out all options that start with a given argument. This is used for
-  // shell autocompletion.
-  std::vector<std::string> SuggestedCompletions;
-  std::vector<std::string> Flags;
-
-  unsigned short DisableFlags =
-      options::NoDriverOption | options::Unsupported | options::Ignored;
-
-  // Distinguish "--autocomplete=-someflag" and "--autocomplete=-someflag,"
-  // because the latter indicates that the user put space before pushing tab
-  // which should end up in a file completion.
-  const bool HasSpace = PassedFlags.endswith(",");
-
-  // Parse PassedFlags by "," as all the command-line flags are passed to this
-  // function separated by ","
-  StringRef TargetFlags = PassedFlags;
-  while (TargetFlags != "") {
-    StringRef CurFlag;
-    std::tie(CurFlag, TargetFlags) = TargetFlags.split(",");
-    Flags.push_back(std::string(CurFlag));
-  }
-
-  // We want to show cc1-only options only when clang is invoked with -cc1 or
-  // -Xclang.
-  if (std::find(Flags.begin(), Flags.end(), "-Xclang") != Flags.end() ||
-      std::find(Flags.begin(), Flags.end(), "-cc1") != Flags.end())
-    DisableFlags &= ~options::NoDriverOption;
-
-  StringRef Cur;
-  Cur = Flags.at(Flags.size() - 1);
-  StringRef Prev;
-  if (Flags.size() >= 2) {
-    Prev = Flags.at(Flags.size() - 2);
-    SuggestedCompletions = Opts->suggestValueCompletions(Prev, Cur);
-  }
-
-  if (SuggestedCompletions.empty())
-    SuggestedCompletions = Opts->suggestValueCompletions(Cur, "");
-
-  // If Flags were empty, it means the user typed `clang [tab]` where we should
-  // list all possible flags. If there was no value completion and the user
-  // pressed tab after a space, we should fall back to a file completion.
-  // We're printing a newline to be consistent with what we print at the end of
-  // this function.
-  if (SuggestedCompletions.empty() && HasSpace && !Flags.empty()) {
-    llvm::outs() << '\n';
-    return;
-  }
-
-  // When flag ends with '=' and there was no value completion, return empty
-  // string and fall back to the file autocompletion.
-  if (SuggestedCompletions.empty() && !Cur.endswith("=")) {
-    // If the flag is in the form of "--autocomplete=-foo",
-    // we were requested to print out all option names that start with "-foo".
-    // For example, "--autocomplete=-fsyn" is expanded to "-fsyntax-only".
-    SuggestedCompletions = Opts->findByPrefix(Cur, DisableFlags);
-
-    // We have to query the -W flags manually as they're not in the OptTable.
-    // TODO: Find a good way to add them to OptTable instead and them remove
-    // this code.
-    for (StringRef S : DiagnosticIDs::getDiagnosticFlags())
-      if (S.startswith(Cur))
-        SuggestedCompletions.push_back(S);
-  }
-
-  // Sort the autocomplete candidates so that shells print them out in a
-  // deterministic order. We could sort in any way, but we chose
-  // case-insensitive sorting for consistency with the -help option
-  // which prints out options in the case-insensitive alphabetical order.
-  llvm::sort(SuggestedCompletions, [](StringRef A, StringRef B) {
-    if (int X = A.compare_lower(B))
-      return X < 0;
-    return A.compare(B) > 0;
-  });
-
-  llvm::outs() << llvm::join(SuggestedCompletions, "\n") << '\n';
-}
-
-bool Driver::HandleImmediateArgs(const Compilation &C) {
-  // The order these options are handled 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_dumpmachine)) {
-    llvm::outs() << C.getDefaultToolChain().getTripleString() << '\n';
-    return false;
-  }
-
-  if (C.getArgs().hasArg(options::OPT_dumpversion)) {
-    // Since -dumpversion is only implemented for pedantic GCC compatibility, we
-    // return an answer which matches our definition of __VERSION__.
-    //
-    // If we want to return a more correct answer some day, then we should
-    // introduce a non-pedantically GCC compatible mode to Clang in which we
-    // provide sensible definitions for -dumpversion, __VERSION__, etc.
-    llvm::outs() << "4.2.1\n";
-    return false;
-  }
-
-  if (C.getArgs().hasArg(options::OPT__print_diagnostic_categories)) {
-    PrintDiagnosticCategories(llvm::outs());
-    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;
-  }
-
-  if (C.getArgs().hasArg(options::OPT_v)) {
-    if (!SystemConfigDir.empty())
-      llvm::errs() << "System configuration file directory: "
-                   << SystemConfigDir << "\n";
-    if (!UserConfigDir.empty())
-      llvm::errs() << "User configuration file directory: "
-                   << UserConfigDir << "\n";
-  }
-
-  const ToolChain &TC = C.getDefaultToolChain();
-
-  if (C.getArgs().hasArg(options::OPT_v))
-    TC.printVerboseInfo(llvm::errs());
-
-  if (C.getArgs().hasArg(options::OPT_print_resource_dir)) {
-    llvm::outs() << ResourceDir << '\n';
-    return false;
-  }
-
-  if (C.getArgs().hasArg(options::OPT_print_search_dirs)) {
-    llvm::outs() << "programs: =";
-    bool separator = false;
-    for (const std::string &Path : TC.getProgramPaths()) {
-      if (separator)
-        llvm::outs() << ':';
-      llvm::outs() << Path;
-      separator = true;
-    }
-    llvm::outs() << "\n";
-    llvm::outs() << "libraries: =" << ResourceDir;
-
-    StringRef sysroot = C.getSysRoot();
-
-    for (const std::string &Path : TC.getFilePaths()) {
-      // Always print a separator. ResourceDir was the first item shown.
-      llvm::outs() << ':';
-      // Interpretation of leading '=' is needed only for NetBSD.
-      if (Path[0] == '=')
-        llvm::outs() << sysroot << Path.substr(1);
-      else
-        llvm::outs() << Path;
-    }
-    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(), TC) << "\n";
-    return false;
-  }
-
-  if (Arg *A = C.getArgs().getLastArg(options::OPT_print_prog_name_EQ)) {
-    StringRef ProgName = A->getValue();
-
-    // Null program name cannot have a path.
-    if (! ProgName.empty())
-      llvm::outs() << GetProgramPath(ProgName, TC);
-
-    llvm::outs() << "\n";
-    return false;
-  }
-
-  if (Arg *A = C.getArgs().getLastArg(options::OPT_autocomplete)) {
-    StringRef PassedFlags = A->getValue();
-    HandleAutocompletions(PassedFlags);
-    return false;
-  }
-
-  if (C.getArgs().hasArg(options::OPT_print_libgcc_file_name)) {
-    ToolChain::RuntimeLibType RLT = TC.GetRuntimeLibType(C.getArgs());
-    const llvm::Triple Triple(TC.ComputeEffectiveClangTriple(C.getArgs()));
-    RegisterEffectiveTriple TripleRAII(TC, Triple);
-    switch (RLT) {
-    case ToolChain::RLT_CompilerRT:
-      llvm::outs() << TC.getCompilerRT(C.getArgs(), "builtins") << "\n";
-      break;
-    case ToolChain::RLT_Libgcc:
-      llvm::outs() << GetFilePath("libgcc.a", TC) << "\n";
-      break;
-    }
-    return false;
-  }
-
-  if (C.getArgs().hasArg(options::OPT_print_multi_lib)) {
-    for (const Multilib &Multilib : TC.getMultilibs())
-      llvm::outs() << Multilib << "\n";
-    return false;
-  }
-
-  if (C.getArgs().hasArg(options::OPT_print_multi_directory)) {
-    const Multilib &Multilib = TC.getMultilib();
-    if (Multilib.gccSuffix().empty())
-      llvm::outs() << ".\n";
-    else {
-      StringRef Suffix(Multilib.gccSuffix());
-      assert(Suffix.front() == '/');
-      llvm::outs() << Suffix.substr(1) << "\n";
-    }
-    return false;
-  }
-
-  if (C.getArgs().hasArg(options::OPT_print_target_triple)) {
-    llvm::outs() << TC.getTripleString() << "\n";
-    return false;
-  }
-
-  if (C.getArgs().hasArg(options::OPT_print_effective_triple)) {
-    const llvm::Triple Triple(TC.ComputeEffectiveClangTriple(C.getArgs()));
-    llvm::outs() << Triple.getTriple() << "\n";
-    return false;
-  }
-
-  return true;
-}
-
-// Display an action graph human-readably.  Action A is the "sink" node
-// and latest-occuring action. Traversal is in pre-order, visiting the
-// inputs to each action before printing the action itself.
-static unsigned PrintActions1(const Compilation &C, Action *A,
-                              std::map<Action *, unsigned> &Ids) {
-  if (Ids.count(A)) // A was already visited.
-    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() << "\"";
-  } else if (BindArchAction *BIA = dyn_cast<BindArchAction>(A)) {
-    os << '"' << BIA->getArchName() << '"' << ", {"
-       << PrintActions1(C, *BIA->input_begin(), Ids) << "}";
-  } else if (OffloadAction *OA = dyn_cast<OffloadAction>(A)) {
-    bool IsFirst = true;
-    OA->doOnEachDependence(
-        [&](Action *A, const ToolChain *TC, const char *BoundArch) {
-          // E.g. for two CUDA device dependences whose bound arch is sm_20 and
-          // sm_35 this will generate:
-          // "cuda-device" (nvptx64-nvidia-cuda:sm_20) {#ID}, "cuda-device"
-          // (nvptx64-nvidia-cuda:sm_35) {#ID}
-          if (!IsFirst)
-            os << ", ";
-          os << '"';
-          if (TC)
-            os << A->getOffloadingKindPrefix();
-          else
-            os << "host";
-          os << " (";
-          os << TC->getTriple().normalize();
-
-          if (BoundArch)
-            os << ":" << BoundArch;
-          os << ")";
-          os << '"';
-          os << " {" << PrintActions1(C, A, Ids) << "}";
-          IsFirst = false;
-        });
-  } else {
-    const ActionList *AL = &A->getInputs();
-
-    if (AL->size()) {
-      const char *Prefix = "{";
-      for (Action *PreRequisite : *AL) {
-        os << Prefix << PrintActions1(C, PreRequisite, Ids);
-        Prefix = ", ";
-      }
-      os << "}";
-    } else
-      os << "{}";
-  }
-
-  // Append offload info for all options other than the offloading action
-  // itself (e.g. (cuda-device, sm_20) or (cuda-host)).
-  std::string offload_str;
-  llvm::raw_string_ostream offload_os(offload_str);
-  if (!isa<OffloadAction>(A)) {
-    auto S = A->getOffloadingKindPrefix();
-    if (!S.empty()) {
-      offload_os << ", (" << S;
-      if (A->getOffloadingArch())
-        offload_os << ", " << A->getOffloadingArch();
-      offload_os << ")";
-    }
-  }
-
-  unsigned Id = Ids.size();
-  Ids[A] = Id;
-  llvm::errs() << Id << ": " << os.str() << ", "
-               << types::getTypeName(A->getType()) << offload_os.str() << "\n";
-
-  return Id;
-}
-
-// Print the action graphs in a compilation C.
-// For example "clang -c file1.c file2.c" is composed of two subgraphs.
-void Driver::PrintActions(const Compilation &C) const {
-  std::map<Action *, unsigned> Ids;
-  for (Action *A : C.getActions())
-    PrintActions1(C, A, Ids);
-}
-
-/// Check whether the given input tree contains any compilation or
-/// assembly actions.
-static bool ContainsCompileOrAssembleAction(const Action *A) {
-  if (isa<CompileJobAction>(A) || isa<BackendJobAction>(A) ||
-      isa<AssembleJobAction>(A))
-    return true;
-
-  for (const Action *Input : A->inputs())
-    if (ContainsCompileOrAssembleAction(Input))
-      return true;
-
-  return false;
-}
-
-void Driver::BuildUniversalActions(Compilation &C, const ToolChain &TC,
-                                   const InputList &BAInputs) const {
-  DerivedArgList &Args = C.getArgs();
-  ActionList &Actions = C.getActions();
-  llvm::PrettyStackTraceString CrashInfo("Building universal build actions");
-  // Collect the list of architectures. Duplicates are allowed, but should only
-  // be handled once (in the order seen).
-  llvm::StringSet<> ArchNames;
-  SmallVector<const char *, 4> Archs;
-  for (Arg *A : Args) {
-    if (A->getOption().matches(options::OPT_arch)) {
-      // Validate the option here; we don't save the type here because its
-      // particular spelling may participate in other driver choices.
-      llvm::Triple::ArchType Arch =
-          tools::darwin::getArchTypeForMachOArchName(A->getValue());
-      if (Arch == llvm::Triple::UnknownArch) {
-        Diag(clang::diag::err_drv_invalid_arch_name) << A->getAsString(Args);
-        continue;
-      }
-
-      A->claim();
-      if (ArchNames.insert(A->getValue()).second)
-        Archs.push_back(A->getValue());
-    }
-  }
-
-  // When there is no explicit arch for this platform, make sure we still bind
-  // the architecture (to the default) so that -Xarch_ is handled correctly.
-  if (!Archs.size())
-    Archs.push_back(Args.MakeArgString(TC.getDefaultUniversalArchName()));
-
-  ActionList SingleActions;
-  BuildActions(C, Args, BAInputs, SingleActions);
-
-  // Add in arch bindings for every top level action, as well as lipo and
-  // dsymutil steps if needed.
-  for (Action* Act : SingleActions) {
-    // Make sure we can lipo this kind of output. If not (and it is an actual
-    // output) then we disallow, since we can't create an output file with the
-    // right name without overwriting it. We could remove this oddity by just
-    // changing the output names to include the arch, which would also fix
-    // -save-temps. Compatibility wins for now.
-
-    if (Archs.size() > 1 && !types::canLipoType(Act->getType()))
-      Diag(clang::diag::err_drv_invalid_output_with_multiple_archs)
-          << types::getTypeName(Act->getType());
-
-    ActionList Inputs;
-    for (unsigned i = 0, e = Archs.size(); i != e; ++i)
-      Inputs.push_back(C.MakeAction<BindArchAction>(Act, Archs[i]));
-
-    // Lipo if necessary, we do it this way because we need to set the arch flag
-    // so that -Xarch_ gets overwritten.
-    if (Inputs.size() == 1 || Act->getType() == types::TY_Nothing)
-      Actions.append(Inputs.begin(), Inputs.end());
-    else
-      Actions.push_back(C.MakeAction<LipoJobAction>(Inputs, Act->getType()));
-
-    // Handle debug info queries.
-    Arg *A = Args.getLastArg(options::OPT_g_Group);
-    if (A && !A->getOption().matches(options::OPT_g0) &&
-        !A->getOption().matches(options::OPT_gstabs) &&
-        ContainsCompileOrAssembleAction(Actions.back())) {
-
-      // Add a 'dsymutil' step if necessary, when debug info is enabled and we
-      // have a compile input. We need to run 'dsymutil' ourselves in such cases
-      // because the debug info will refer to a temporary object file which
-      // will be removed at the end of the compilation process.
-      if (Act->getType() == types::TY_Image) {
-        ActionList Inputs;
-        Inputs.push_back(Actions.back());
-        Actions.pop_back();
-        Actions.push_back(
-            C.MakeAction<DsymutilJobAction>(Inputs, types::TY_dSYM));
-      }
-
-      // Verify the debug info output.
-      if (Args.hasArg(options::OPT_verify_debug_info)) {
-        Action* LastAction = Actions.back();
-        Actions.pop_back();
-        Actions.push_back(C.MakeAction<VerifyDebugInfoJobAction>(
-            LastAction, types::TY_Nothing));
-      }
-    }
-  }
-}
-
-/// Check that the file referenced by Value exists. If it doesn't,
-/// issue a diagnostic and return false.
-static bool DiagnoseInputExistence(const Driver &D, const DerivedArgList &Args,
-                                   StringRef Value, types::ID Ty) {
-  if (!D.getCheckInputsExist())
-    return true;
-
-  // stdin always exists.
-  if (Value == "-")
-    return true;
-
-  SmallString<64> Path(Value);
-  if (Arg *WorkDir = Args.getLastArg(options::OPT_working_directory)) {
-    if (!llvm::sys::path::is_absolute(Path)) {
-      SmallString<64> Directory(WorkDir->getValue());
-      llvm::sys::path::append(Directory, Value);
-      Path.assign(Directory);
-    }
-  }
-
-  if (D.getVFS().exists(Path))
-    return true;
-
-  if (D.IsCLMode()) {
-    if (!llvm::sys::path::is_absolute(Twine(Path)) &&
-        llvm::sys::Process::FindInEnvPath("LIB", Value))
-      return true;
-
-    if (Args.hasArg(options::OPT__SLASH_link) && Ty == types::TY_Object) {
-      // Arguments to the /link flag might cause the linker to search for object
-      // and library files in paths we don't know about. Don't error in such
-      // cases.
-      return true;
-    }
-  }
-
-  D.Diag(clang::diag::err_drv_no_such_file) << Path;
-  return false;
-}
-
-// Construct a the list of inputs and their types.
-void Driver::BuildInputs(const ToolChain &TC, DerivedArgList &Args,
-                         InputList &Inputs) const {
-  // Track the current user specified (-x) input. We also explicitly track the
-  // argument used to set the type; we only want to claim the type when we
-  // actually use it, so we warn about unused -x arguments.
-  types::ID InputType = types::TY_Nothing;
-  Arg *InputTypeArg = nullptr;
-
-  // The last /TC or /TP option sets the input type to C or C++ globally.
-  if (Arg *TCTP = Args.getLastArgNoClaim(options::OPT__SLASH_TC,
-                                         options::OPT__SLASH_TP)) {
-    InputTypeArg = TCTP;
-    InputType = TCTP->getOption().matches(options::OPT__SLASH_TC)
-                    ? types::TY_C
-                    : types::TY_CXX;
-
-    Arg *Previous = nullptr;
-    bool ShowNote = false;
-    for (Arg *A : Args.filtered(options::OPT__SLASH_TC, options::OPT__SLASH_TP)) {
-      if (Previous) {
-        Diag(clang::diag::warn_drv_overriding_flag_option)
-          << Previous->getSpelling() << A->getSpelling();
-        ShowNote = true;
-      }
-      Previous = A;
-    }
-    if (ShowNote)
-      Diag(clang::diag::note_drv_t_option_is_global);
-
-    // No driver mode exposes -x and /TC or /TP; we don't support mixing them.
-    assert(!Args.hasArg(options::OPT_x) && "-x and /TC or /TP is not allowed");
-  }
-
-  for (Arg *A : Args) {
-    if (A->getOption().getKind() == Option::InputClass) {
-      const char *Value = A->getValue();
-      types::ID Ty = types::TY_INVALID;
-
-      // Infer the input type if necessary.
-      if (InputType == types::TY_Nothing) {
-        // If there was an explicit arg for this, claim it.
-        if (InputTypeArg)
-          InputTypeArg->claim();
-
-        // stdin must be handled specially.
-        if (memcmp(Value, "-", 2) == 0) {
-          // If running with -E, treat as a C input (this changes the builtin
-          // macros, for example). This may be overridden by -ObjC below.
-          //
-          // Otherwise emit an error but still use a valid type to avoid
-          // spurious errors (e.g., no inputs).
-          if (!Args.hasArgNoClaim(options::OPT_E) && !CCCIsCPP())
-            Diag(IsCLMode() ? clang::diag::err_drv_unknown_stdin_type_clang_cl
-                            : clang::diag::err_drv_unknown_stdin_type);
-          Ty = types::TY_C;
-        } else {
-          // Otherwise lookup by extension.
-          // Fallback is C if invoked as C preprocessor, C++ if invoked with
-          // clang-cl /E, or Object otherwise.
-          // We use a host hook here because Darwin at least has its own
-          // idea of what .s is.
-          if (const char *Ext = strrchr(Value, '.'))
-            Ty = TC.LookupTypeForExtension(Ext + 1);
-
-          if (Ty == types::TY_INVALID) {
-            if (CCCIsCPP())
-              Ty = types::TY_C;
-            else if (IsCLMode() && Args.hasArgNoClaim(options::OPT_E))
-              Ty = types::TY_CXX;
-            else
-              Ty = types::TY_Object;
-          }
-
-          // If the driver is invoked as C++ compiler (like clang++ or c++) it
-          // should autodetect some input files as C++ for g++ compatibility.
-          if (CCCIsCXX()) {
-            types::ID OldTy = Ty;
-            Ty = types::lookupCXXTypeForCType(Ty);
-
-            if (Ty != OldTy)
-              Diag(clang::diag::warn_drv_treating_input_as_cxx)
-                  << getTypeName(OldTy) << getTypeName(Ty);
-          }
-        }
-
-        // -ObjC and -ObjC++ override the default language, but only for "source
-        // files". We just treat everything that isn't a linker input as a
-        // source file.
-        //
-        // FIXME: Clean this up if we move the phase sequence into the type.
-        if (Ty != types::TY_Object) {
-          if (Args.hasArg(options::OPT_ObjC))
-            Ty = types::TY_ObjC;
-          else if (Args.hasArg(options::OPT_ObjCXX))
-            Ty = types::TY_ObjCXX;
-        }
-      } else {
-        assert(InputTypeArg && "InputType set w/o InputTypeArg");
-        if (!InputTypeArg->getOption().matches(options::OPT_x)) {
-          // If emulating cl.exe, make sure that /TC and /TP don't affect input
-          // object files.
-          const char *Ext = strrchr(Value, '.');
-          if (Ext && TC.LookupTypeForExtension(Ext + 1) == types::TY_Object)
-            Ty = types::TY_Object;
-        }
-        if (Ty == types::TY_INVALID) {
-          Ty = InputType;
-          InputTypeArg->claim();
-        }
-      }
-
-      if (DiagnoseInputExistence(*this, Args, Value, Ty))
-        Inputs.push_back(std::make_pair(Ty, A));
-
-    } else if (A->getOption().matches(options::OPT__SLASH_Tc)) {
-      StringRef Value = A->getValue();
-      if (DiagnoseInputExistence(*this, Args, Value, types::TY_C)) {
-        Arg *InputArg = MakeInputArg(Args, *Opts, A->getValue());
-        Inputs.push_back(std::make_pair(types::TY_C, InputArg));
-      }
-      A->claim();
-    } else if (A->getOption().matches(options::OPT__SLASH_Tp)) {
-      StringRef Value = A->getValue();
-      if (DiagnoseInputExistence(*this, Args, Value, types::TY_CXX)) {
-        Arg *InputArg = MakeInputArg(Args, *Opts, A->getValue());
-        Inputs.push_back(std::make_pair(types::TY_CXX, InputArg));
-      }
-      A->claim();
-    } else if (A->getOption().hasFlag(options::LinkerInput)) {
-      // Just treat as object type, we could make a special type for this if
-      // necessary.
-      Inputs.push_back(std::make_pair(types::TY_Object, A));
-
-    } else if (A->getOption().matches(options::OPT_x)) {
-      InputTypeArg = A;
-      InputType = types::lookupTypeForTypeSpecifier(A->getValue());
-      A->claim();
-
-      // Follow gcc behavior and treat as linker input for invalid -x
-      // options. Its not clear why we shouldn't just revert to unknown; but
-      // this isn't very important, we might as well be bug compatible.
-      if (!InputType) {
-        Diag(clang::diag::err_drv_unknown_language) << A->getValue();
-        InputType = types::TY_Object;
-      }
-    } else if (A->getOption().getID() == options::OPT__SLASH_U) {
-      assert(A->getNumValues() == 1 && "The /U option has one value.");
-      StringRef Val = A->getValue(0);
-      if (Val.find_first_of("/\\") != StringRef::npos) {
-        // Warn about e.g. "/Users/me/myfile.c".
-        Diag(diag::warn_slash_u_filename) << Val;
-        Diag(diag::note_use_dashdash);
-      }
-    }
-  }
-  if (CCCIsCPP() && Inputs.empty()) {
-    // If called as standalone preprocessor, stdin is processed
-    // if no other input is present.
-    Arg *A = MakeInputArg(Args, *Opts, "-");
-    Inputs.push_back(std::make_pair(types::TY_C, A));
-  }
-}
-
-namespace {
-/// Provides a convenient interface for different programming models to generate
-/// the required device actions.
-class OffloadingActionBuilder final {
-  /// Flag used to trace errors in the builder.
-  bool IsValid = false;
-
-  /// The compilation that is using this builder.
-  Compilation &C;
-
-  /// Map between an input argument and the offload kinds used to process it.
-  std::map<const Arg *, unsigned> InputArgToOffloadKindMap;
-
-  /// Builder interface. It doesn't build anything or keep any state.
-  class DeviceActionBuilder {
-  public:
-    typedef llvm::SmallVector<phases::ID, phases::MaxNumberOfPhases> PhasesTy;
-
-    enum ActionBuilderReturnCode {
-      // The builder acted successfully on the current action.
-      ABRT_Success,
-      // The builder didn't have to act on the current action.
-      ABRT_Inactive,
-      // The builder was successful and requested the host action to not be
-      // generated.
-      ABRT_Ignore_Host,
-    };
-
-  protected:
-    /// Compilation associated with this builder.
-    Compilation &C;
-
-    /// Tool chains associated with this builder. The same programming
-    /// model may have associated one or more tool chains.
-    SmallVector<const ToolChain *, 2> ToolChains;
-
-    /// The derived arguments associated with this builder.
-    DerivedArgList &Args;
-
-    /// The inputs associated with this builder.
-    const Driver::InputList &Inputs;
-
-    /// The associated offload kind.
-    Action::OffloadKind AssociatedOffloadKind = Action::OFK_None;
-
-  public:
-    DeviceActionBuilder(Compilation &C, DerivedArgList &Args,
-                        const Driver::InputList &Inputs,
-                        Action::OffloadKind AssociatedOffloadKind)
-        : C(C), Args(Args), Inputs(Inputs),
-          AssociatedOffloadKind(AssociatedOffloadKind) {}
-    virtual ~DeviceActionBuilder() {}
-
-    /// Fill up the array \a DA with all the device dependences that should be
-    /// added to the provided host action \a HostAction. By default it is
-    /// inactive.
-    virtual ActionBuilderReturnCode
-    getDeviceDependences(OffloadAction::DeviceDependences &DA,
-                         phases::ID CurPhase, phases::ID FinalPhase,
-                         PhasesTy &Phases) {
-      return ABRT_Inactive;
-    }
-
-    /// Update the state to include the provided host action \a HostAction as a
-    /// dependency of the current device action. By default it is inactive.
-    virtual ActionBuilderReturnCode addDeviceDepences(Action *HostAction) {
-      return ABRT_Inactive;
-    }
-
-    /// Append top level actions generated by the builder. Return true if errors
-    /// were found.
-    virtual void appendTopLevelActions(ActionList &AL) {}
-
-    /// Append linker actions generated by the builder. Return true if errors
-    /// were found.
-    virtual void appendLinkDependences(OffloadAction::DeviceDependences &DA) {}
-
-    /// Initialize the builder. Return true if any initialization errors are
-    /// found.
-    virtual bool initialize() { return false; }
-
-    /// Return true if the builder can use bundling/unbundling.
-    virtual bool canUseBundlerUnbundler() const { return false; }
-
-    /// Return true if this builder is valid. We have a valid builder if we have
-    /// associated device tool chains.
-    bool isValid() { return !ToolChains.empty(); }
-
-    /// Return the associated offload kind.
-    Action::OffloadKind getAssociatedOffloadKind() {
-      return AssociatedOffloadKind;
-    }
-  };
-
-  /// Base class for CUDA/HIP action builder. It injects device code in
-  /// the host backend action.
-  class CudaActionBuilderBase : public DeviceActionBuilder {
-  protected:
-    /// Flags to signal if the user requested host-only or device-only
-    /// compilation.
-    bool CompileHostOnly = false;
-    bool CompileDeviceOnly = false;
-
-    /// List of GPU architectures to use in this compilation.
-    SmallVector<CudaArch, 4> GpuArchList;
-
-    /// The CUDA actions for the current input.
-    ActionList CudaDeviceActions;
-
-    /// The CUDA fat binary if it was generated for the current input.
-    Action *CudaFatBinary = nullptr;
-
-    /// Flag that is set to true if this builder acted on the current input.
-    bool IsActive = false;
-  public:
-    CudaActionBuilderBase(Compilation &C, DerivedArgList &Args,
-                          const Driver::InputList &Inputs,
-                          Action::OffloadKind OFKind)
-        : DeviceActionBuilder(C, Args, Inputs, OFKind) {}
-
-    ActionBuilderReturnCode addDeviceDepences(Action *HostAction) override {
-      // While generating code for CUDA, we only depend on the host input action
-      // to trigger the creation of all the CUDA device actions.
-
-      // If we are dealing with an input action, replicate it for each GPU
-      // architecture. If we are in host-only mode we return 'success' so that
-      // the host uses the CUDA offload kind.
-      if (auto *IA = dyn_cast<InputAction>(HostAction)) {
-        assert(!GpuArchList.empty() &&
-               "We should have at least one GPU architecture.");
-
-        // If the host input is not CUDA or HIP, we don't need to bother about
-        // this input.
-        if (IA->getType() != types::TY_CUDA &&
-            IA->getType() != types::TY_HIP) {
-          // The builder will ignore this input.
-          IsActive = false;
-          return ABRT_Inactive;
-        }
-
-        // Set the flag to true, so that the builder acts on the current input.
-        IsActive = true;
-
-        if (CompileHostOnly)
-          return ABRT_Success;
-
-        // Replicate inputs for each GPU architecture.
-        auto Ty = IA->getType() == types::TY_HIP ? types::TY_HIP_DEVICE
-                                                 : types::TY_CUDA_DEVICE;
-        for (unsigned I = 0, E = GpuArchList.size(); I != E; ++I) {
-          CudaDeviceActions.push_back(
-              C.MakeAction<InputAction>(IA->getInputArg(), Ty));
-        }
-
-        return ABRT_Success;
-      }
-
-      // If this is an unbundling action use it as is for each CUDA toolchain.
-      if (auto *UA = dyn_cast<OffloadUnbundlingJobAction>(HostAction)) {
-        CudaDeviceActions.clear();
-        auto *IA = cast<InputAction>(UA->getInputs().back());
-        std::string FileName = IA->getInputArg().getAsString(Args);
-        // Check if the type of the file is the same as the action. Do not
-        // unbundle it if it is not. Do not unbundle .so files, for example,
-        // which are not object files.
-        if (IA->getType() == types::TY_Object &&
-            (!llvm::sys::path::has_extension(FileName) ||
-             types::lookupTypeForExtension(
-                 llvm::sys::path::extension(FileName).drop_front()) !=
-                 types::TY_Object))
-          return ABRT_Inactive;
-
-        for (auto Arch : GpuArchList) {
-          CudaDeviceActions.push_back(UA);
-          UA->registerDependentActionInfo(ToolChains[0], CudaArchToString(Arch),
-                                          AssociatedOffloadKind);
-        }
-        return ABRT_Success;
-      }
-
-      return IsActive ? ABRT_Success : ABRT_Inactive;
-    }
-
-    void appendTopLevelActions(ActionList &AL) override {
-      // Utility to append actions to the top level list.
-      auto AddTopLevel = [&](Action *A, CudaArch BoundArch) {
-        OffloadAction::DeviceDependences Dep;
-        Dep.add(*A, *ToolChains.front(), CudaArchToString(BoundArch),
-                AssociatedOffloadKind);
-        AL.push_back(C.MakeAction<OffloadAction>(Dep, A->getType()));
-      };
-
-      // If we have a fat binary, add it to the list.
-      if (CudaFatBinary) {
-        AddTopLevel(CudaFatBinary, CudaArch::UNKNOWN);
-        CudaDeviceActions.clear();
-        CudaFatBinary = nullptr;
-        return;
-      }
-
-      if (CudaDeviceActions.empty())
-        return;
-
-      // If we have CUDA actions at this point, that's because we have a have
-      // partial compilation, so we should have an action for each GPU
-      // architecture.
-      assert(CudaDeviceActions.size() == GpuArchList.size() &&
-             "Expecting one action per GPU architecture.");
-      assert(ToolChains.size() == 1 &&
-             "Expecting to have a sing CUDA toolchain.");
-      for (unsigned I = 0, E = GpuArchList.size(); I != E; ++I)
-        AddTopLevel(CudaDeviceActions[I], GpuArchList[I]);
-
-      CudaDeviceActions.clear();
-    }
-
-    bool initialize() override {
-      assert(AssociatedOffloadKind == Action::OFK_Cuda ||
-             AssociatedOffloadKind == Action::OFK_HIP);
-
-      // We don't need to support CUDA.
-      if (AssociatedOffloadKind == Action::OFK_Cuda &&
-          !C.hasOffloadToolChain<Action::OFK_Cuda>())
-        return false;
-
-      // We don't need to support HIP.
-      if (AssociatedOffloadKind == Action::OFK_HIP &&
-          !C.hasOffloadToolChain<Action::OFK_HIP>())
-        return false;
-
-      const ToolChain *HostTC = C.getSingleOffloadToolChain<Action::OFK_Host>();
-      assert(HostTC && "No toolchain for host compilation.");
-      if (HostTC->getTriple().isNVPTX() ||
-          HostTC->getTriple().getArch() == llvm::Triple::amdgcn) {
-        // We do not support targeting NVPTX/AMDGCN for host compilation. Throw
-        // an error and abort pipeline construction early so we don't trip
-        // asserts that assume device-side compilation.
-        C.getDriver().Diag(diag::err_drv_cuda_host_arch)
-            << HostTC->getTriple().getArchName();
-        return true;
-      }
-
-      ToolChains.push_back(
-          AssociatedOffloadKind == Action::OFK_Cuda
-              ? C.getSingleOffloadToolChain<Action::OFK_Cuda>()
-              : C.getSingleOffloadToolChain<Action::OFK_HIP>());
-
-      Arg *PartialCompilationArg = Args.getLastArg(
-          options::OPT_cuda_host_only, options::OPT_cuda_device_only,
-          options::OPT_cuda_compile_host_device);
-      CompileHostOnly = PartialCompilationArg &&
-                        PartialCompilationArg->getOption().matches(
-                            options::OPT_cuda_host_only);
-      CompileDeviceOnly = PartialCompilationArg &&
-                          PartialCompilationArg->getOption().matches(
-                              options::OPT_cuda_device_only);
-
-      // Collect all cuda_gpu_arch parameters, removing duplicates.
-      std::set<CudaArch> GpuArchs;
-      bool Error = false;
-      for (Arg *A : Args) {
-        if (!(A->getOption().matches(options::OPT_cuda_gpu_arch_EQ) ||
-              A->getOption().matches(options::OPT_no_cuda_gpu_arch_EQ)))
-          continue;
-        A->claim();
-
-        const StringRef ArchStr = A->getValue();
-        if (A->getOption().matches(options::OPT_no_cuda_gpu_arch_EQ) &&
-            ArchStr == "all") {
-          GpuArchs.clear();
-          continue;
-        }
-        CudaArch Arch = StringToCudaArch(ArchStr);
-        if (Arch == CudaArch::UNKNOWN) {
-          C.getDriver().Diag(clang::diag::err_drv_cuda_bad_gpu_arch) << ArchStr;
-          Error = true;
-        } else if (A->getOption().matches(options::OPT_cuda_gpu_arch_EQ))
-          GpuArchs.insert(Arch);
-        else if (A->getOption().matches(options::OPT_no_cuda_gpu_arch_EQ))
-          GpuArchs.erase(Arch);
-        else
-          llvm_unreachable("Unexpected option.");
-      }
-
-      // Collect list of GPUs remaining in the set.
-      for (CudaArch Arch : GpuArchs)
-        GpuArchList.push_back(Arch);
-
-      // Default to sm_20 which is the lowest common denominator for
-      // supported GPUs.  sm_20 code should work correctly, if
-      // suboptimally, on all newer GPUs.
-      if (GpuArchList.empty())
-        GpuArchList.push_back(CudaArch::SM_20);
-
-      return Error;
-    }
-  };
-
-  /// \brief CUDA action builder. It injects device code in the host backend
-  /// action.
-  class CudaActionBuilder final : public CudaActionBuilderBase {
-  public:
-    CudaActionBuilder(Compilation &C, DerivedArgList &Args,
-                      const Driver::InputList &Inputs)
-        : CudaActionBuilderBase(C, Args, Inputs, Action::OFK_Cuda) {}
-
-    ActionBuilderReturnCode
-    getDeviceDependences(OffloadAction::DeviceDependences &DA,
-                         phases::ID CurPhase, phases::ID FinalPhase,
-                         PhasesTy &Phases) override {
-      if (!IsActive)
-        return ABRT_Inactive;
-
-      // If we don't have more CUDA actions, we don't have any dependences to
-      // create for the host.
-      if (CudaDeviceActions.empty())
-        return ABRT_Success;
-
-      assert(CudaDeviceActions.size() == GpuArchList.size() &&
-             "Expecting one action per GPU architecture.");
-      assert(!CompileHostOnly &&
-             "Not expecting CUDA actions in host-only compilation.");
-
-      // If we are generating code for the device or we are in a backend phase,
-      // we attempt to generate the fat binary. We compile each arch to ptx and
-      // assemble to cubin, then feed the cubin *and* the ptx into a device
-      // "link" action, which uses fatbinary to combine these cubins into one
-      // fatbin.  The fatbin is then an input to the host action if not in
-      // device-only mode.
-      if (CompileDeviceOnly || CurPhase == phases::Backend) {
-        ActionList DeviceActions;
-        for (unsigned I = 0, E = GpuArchList.size(); I != E; ++I) {
-          // Produce the device action from the current phase up to the assemble
-          // phase.
-          for (auto Ph : Phases) {
-            // Skip the phases that were already dealt with.
-            if (Ph < CurPhase)
-              continue;
-            // We have to be consistent with the host final phase.
-            if (Ph > FinalPhase)
-              break;
-
-            CudaDeviceActions[I] = C.getDriver().ConstructPhaseAction(
-                C, Args, Ph, CudaDeviceActions[I], Action::OFK_Cuda);
-
-            if (Ph == phases::Assemble)
-              break;
-          }
-
-          // If we didn't reach the assemble phase, we can't generate the fat
-          // binary. We don't need to generate the fat binary if we are not in
-          // device-only mode.
-          if (!isa<AssembleJobAction>(CudaDeviceActions[I]) ||
-              CompileDeviceOnly)
-            continue;
-
-          Action *AssembleAction = CudaDeviceActions[I];
-          assert(AssembleAction->getType() == types::TY_Object);
-          assert(AssembleAction->getInputs().size() == 1);
-
-          Action *BackendAction = AssembleAction->getInputs()[0];
-          assert(BackendAction->getType() == types::TY_PP_Asm);
-
-          for (auto &A : {AssembleAction, BackendAction}) {
-            OffloadAction::DeviceDependences DDep;
-            DDep.add(*A, *ToolChains.front(), CudaArchToString(GpuArchList[I]),
-                     Action::OFK_Cuda);
-            DeviceActions.push_back(
-                C.MakeAction<OffloadAction>(DDep, A->getType()));
-          }
-        }
-
-        // We generate the fat binary if we have device input actions.
-        if (!DeviceActions.empty()) {
-          CudaFatBinary =
-              C.MakeAction<LinkJobAction>(DeviceActions, types::TY_CUDA_FATBIN);
-
-          if (!CompileDeviceOnly) {
-            DA.add(*CudaFatBinary, *ToolChains.front(), /*BoundArch=*/nullptr,
-                   Action::OFK_Cuda);
-            // Clear the fat binary, it is already a dependence to an host
-            // action.
-            CudaFatBinary = nullptr;
-          }
-
-          // Remove the CUDA actions as they are already connected to an host
-          // action or fat binary.
-          CudaDeviceActions.clear();
-        }
-
-        // We avoid creating host action in device-only mode.
-        return CompileDeviceOnly ? ABRT_Ignore_Host : ABRT_Success;
-      } else if (CurPhase > phases::Backend) {
-        // If we are past the backend phase and still have a device action, we
-        // don't have to do anything as this action is already a device
-        // top-level action.
-        return ABRT_Success;
-      }
-
-      assert(CurPhase < phases::Backend && "Generating single CUDA "
-                                           "instructions should only occur "
-                                           "before the backend phase!");
-
-      // By default, we produce an action for each device arch.
-      for (Action *&A : CudaDeviceActions)
-        A = C.getDriver().ConstructPhaseAction(C, Args, CurPhase, A);
-
-      return ABRT_Success;
-    }
-  };
-  /// \brief HIP action builder. It injects device code in the host backend
-  /// action.
-  class HIPActionBuilder final : public CudaActionBuilderBase {
-    /// The linker inputs obtained for each device arch.
-    SmallVector<ActionList, 8> DeviceLinkerInputs;
-    bool Relocatable;
-
-  public:
-    HIPActionBuilder(Compilation &C, DerivedArgList &Args,
-                     const Driver::InputList &Inputs)
-        : CudaActionBuilderBase(C, Args, Inputs, Action::OFK_HIP),
-          Relocatable(false) {}
-
-    bool canUseBundlerUnbundler() const override { return true; }
-
-    ActionBuilderReturnCode
-    getDeviceDependences(OffloadAction::DeviceDependences &DA,
-                         phases::ID CurPhase, phases::ID FinalPhase,
-                         PhasesTy &Phases) override {
-      // amdgcn does not support linking of object files, therefore we skip
-      // backend and assemble phases to output LLVM IR. Except for generating
-      // non-relocatable device coee, where we generate fat binary for device
-      // code and pass to host in Backend phase.
-      if (CudaDeviceActions.empty() ||
-          (CurPhase == phases::Backend && Relocatable) ||
-          CurPhase == phases::Assemble)
-        return ABRT_Success;
-
-      assert(((CurPhase == phases::Link && Relocatable) ||
-              CudaDeviceActions.size() == GpuArchList.size()) &&
-             "Expecting one action per GPU architecture.");
-      assert(!CompileHostOnly &&
-             "Not expecting CUDA actions in host-only compilation.");
-
-      if (!Relocatable && CurPhase == phases::Backend) {
-        // If we are in backend phase, we attempt to generate the fat binary.
-        // We compile each arch to IR and use a link action to generate code
-        // object containing ISA. Then we use a special "link" action to create
-        // a fat binary containing all the code objects for different GPU's.
-        // The fat binary is then an input to the host action.
-        for (unsigned I = 0, E = GpuArchList.size(); I != E; ++I) {
-          // Create a link action to link device IR with device library
-          // and generate ISA.
-          ActionList AL;
-          AL.push_back(CudaDeviceActions[I]);
-          CudaDeviceActions[I] =
-              C.MakeAction<LinkJobAction>(AL, types::TY_Image);
-
-          // OffloadingActionBuilder propagates device arch until an offload
-          // action. Since the next action for creating fatbin does
-          // not have device arch, whereas the above link action and its input
-          // have device arch, an offload action is needed to stop the null
-          // device arch of the next action being propagated to the above link
-          // action.
-          OffloadAction::DeviceDependences DDep;
-          DDep.add(*CudaDeviceActions[I], *ToolChains.front(),
-                   CudaArchToString(GpuArchList[I]), AssociatedOffloadKind);
-          CudaDeviceActions[I] = C.MakeAction<OffloadAction>(
-              DDep, CudaDeviceActions[I]->getType());
-        }
-        // Create HIP fat binary with a special "link" action.
-        CudaFatBinary =
-            C.MakeAction<LinkJobAction>(CudaDeviceActions,
-                types::TY_HIP_FATBIN);
-
-        if (!CompileDeviceOnly) {
-          DA.add(*CudaFatBinary, *ToolChains.front(), /*BoundArch=*/nullptr,
-                 AssociatedOffloadKind);
-          // Clear the fat binary, it is already a dependence to an host
-          // action.
-          CudaFatBinary = nullptr;
-        }
-
-        // Remove the CUDA actions as they are already connected to an host
-        // action or fat binary.
-        CudaDeviceActions.clear();
-
-        return CompileDeviceOnly ? ABRT_Ignore_Host : ABRT_Success;
-      } else if (CurPhase == phases::Link) {
-        // Save CudaDeviceActions to DeviceLinkerInputs for each GPU subarch.
-        // This happens to each device action originated from each input file.
-        // Later on, device actions in DeviceLinkerInputs are used to create
-        // device link actions in appendLinkDependences and the created device
-        // link actions are passed to the offload action as device dependence.
-        DeviceLinkerInputs.resize(CudaDeviceActions.size());
-        auto LI = DeviceLinkerInputs.begin();
-        for (auto *A : CudaDeviceActions) {
-          LI->push_back(A);
-          ++LI;
-        }
-
-        // We will pass the device action as a host dependence, so we don't
-        // need to do anything else with them.
-        CudaDeviceActions.clear();
-        return ABRT_Success;
-      }
-
-      // By default, we produce an action for each device arch.
-      for (Action *&A : CudaDeviceActions)
-        A = C.getDriver().ConstructPhaseAction(C, Args, CurPhase, A,
-                                               AssociatedOffloadKind);
-
-      return ABRT_Success;
-    }
-
-    void appendLinkDependences(OffloadAction::DeviceDependences &DA) override {
-      // Append a new link action for each device.
-      unsigned I = 0;
-      for (auto &LI : DeviceLinkerInputs) {
-        auto *DeviceLinkAction =
-            C.MakeAction<LinkJobAction>(LI, types::TY_Image);
-        DA.add(*DeviceLinkAction, *ToolChains[0],
-               CudaArchToString(GpuArchList[I]), AssociatedOffloadKind);
-        ++I;
-      }
-    }
-
-    bool initialize() override {
-      Relocatable = Args.hasFlag(options::OPT_fgpu_rdc,
-          options::OPT_fno_gpu_rdc, /*Default=*/false);
-
-      return CudaActionBuilderBase::initialize();
-    }
-  };
-
-  /// OpenMP action builder. The host bitcode is passed to the device frontend
-  /// and all the device linked images are passed to the host link phase.
-  class OpenMPActionBuilder final : public DeviceActionBuilder {
-    /// The OpenMP actions for the current input.
-    ActionList OpenMPDeviceActions;
-
-    /// The linker inputs obtained for each toolchain.
-    SmallVector<ActionList, 8> DeviceLinkerInputs;
-
-  public:
-    OpenMPActionBuilder(Compilation &C, DerivedArgList &Args,
-                        const Driver::InputList &Inputs)
-        : DeviceActionBuilder(C, Args, Inputs, Action::OFK_OpenMP) {}
-
-    ActionBuilderReturnCode
-    getDeviceDependences(OffloadAction::DeviceDependences &DA,
-                         phases::ID CurPhase, phases::ID FinalPhase,
-                         PhasesTy &Phases) override {
-      if (OpenMPDeviceActions.empty())
-        return ABRT_Inactive;
-
-      // We should always have an action for each input.
-      assert(OpenMPDeviceActions.size() == ToolChains.size() &&
-             "Number of OpenMP actions and toolchains do not match.");
-
-      // The host only depends on device action in the linking phase, when all
-      // the device images have to be embedded in the host image.
-      if (CurPhase == phases::Link) {
-        assert(ToolChains.size() == DeviceLinkerInputs.size() &&
-               "Toolchains and linker inputs sizes do not match.");
-        auto LI = DeviceLinkerInputs.begin();
-        for (auto *A : OpenMPDeviceActions) {
-          LI->push_back(A);
-          ++LI;
-        }
-
-        // We passed the device action as a host dependence, so we don't need to
-        // do anything else with them.
-        OpenMPDeviceActions.clear();
-        return ABRT_Success;
-      }
-
-      // By default, we produce an action for each device arch.
-      for (Action *&A : OpenMPDeviceActions)
-        A = C.getDriver().ConstructPhaseAction(C, Args, CurPhase, A);
-
-      return ABRT_Success;
-    }
-
-    ActionBuilderReturnCode addDeviceDepences(Action *HostAction) override {
-
-      // If this is an input action replicate it for each OpenMP toolchain.
-      if (auto *IA = dyn_cast<InputAction>(HostAction)) {
-        OpenMPDeviceActions.clear();
-        for (unsigned I = 0; I < ToolChains.size(); ++I)
-          OpenMPDeviceActions.push_back(
-              C.MakeAction<InputAction>(IA->getInputArg(), IA->getType()));
-        return ABRT_Success;
-      }
-
-      // If this is an unbundling action use it as is for each OpenMP toolchain.
-      if (auto *UA = dyn_cast<OffloadUnbundlingJobAction>(HostAction)) {
-        OpenMPDeviceActions.clear();
-        auto *IA = cast<InputAction>(UA->getInputs().back());
-        std::string FileName = IA->getInputArg().getAsString(Args);
-        // Check if the type of the file is the same as the action. Do not
-        // unbundle it if it is not. Do not unbundle .so files, for example,
-        // which are not object files.
-        if (IA->getType() == types::TY_Object &&
-            (!llvm::sys::path::has_extension(FileName) ||
-             types::lookupTypeForExtension(
-                 llvm::sys::path::extension(FileName).drop_front()) !=
-                 types::TY_Object))
-          return ABRT_Inactive;
-        for (unsigned I = 0; I < ToolChains.size(); ++I) {
-          OpenMPDeviceActions.push_back(UA);
-          UA->registerDependentActionInfo(
-              ToolChains[I], /*BoundArch=*/StringRef(), Action::OFK_OpenMP);
-        }
-        return ABRT_Success;
-      }
-
-      // When generating code for OpenMP we use the host compile phase result as
-      // a dependence to the device compile phase so that it can learn what
-      // declarations should be emitted. However, this is not the only use for
-      // the host action, so we prevent it from being collapsed.
-      if (isa<CompileJobAction>(HostAction)) {
-        HostAction->setCannotBeCollapsedWithNextDependentAction();
-        assert(ToolChains.size() == OpenMPDeviceActions.size() &&
-               "Toolchains and device action sizes do not match.");
-        OffloadAction::HostDependence HDep(
-            *HostAction, *C.getSingleOffloadToolChain<Action::OFK_Host>(),
-            /*BoundArch=*/nullptr, Action::OFK_OpenMP);
-        auto TC = ToolChains.begin();
-        for (Action *&A : OpenMPDeviceActions) {
-          assert(isa<CompileJobAction>(A));
-          OffloadAction::DeviceDependences DDep;
-          DDep.add(*A, **TC, /*BoundArch=*/nullptr, Action::OFK_OpenMP);
-          A = C.MakeAction<OffloadAction>(HDep, DDep);
-          ++TC;
-        }
-      }
-      return ABRT_Success;
-    }
-
-    void appendTopLevelActions(ActionList &AL) override {
-      if (OpenMPDeviceActions.empty())
-        return;
-
-      // We should always have an action for each input.
-      assert(OpenMPDeviceActions.size() == ToolChains.size() &&
-             "Number of OpenMP actions and toolchains do not match.");
-
-      // Append all device actions followed by the proper offload action.
-      auto TI = ToolChains.begin();
-      for (auto *A : OpenMPDeviceActions) {
-        OffloadAction::DeviceDependences Dep;
-        Dep.add(*A, **TI, /*BoundArch=*/nullptr, Action::OFK_OpenMP);
-        AL.push_back(C.MakeAction<OffloadAction>(Dep, A->getType()));
-        ++TI;
-      }
-      // We no longer need the action stored in this builder.
-      OpenMPDeviceActions.clear();
-    }
-
-    void appendLinkDependences(OffloadAction::DeviceDependences &DA) override {
-      assert(ToolChains.size() == DeviceLinkerInputs.size() &&
-             "Toolchains and linker inputs sizes do not match.");
-
-      // Append a new link action for each device.
-      auto TC = ToolChains.begin();
-      for (auto &LI : DeviceLinkerInputs) {
-        auto *DeviceLinkAction =
-            C.MakeAction<LinkJobAction>(LI, types::TY_Image);
-        DA.add(*DeviceLinkAction, **TC, /*BoundArch=*/nullptr,
-               Action::OFK_OpenMP);
-        ++TC;
-      }
-    }
-
-    bool initialize() override {
-      // Get the OpenMP toolchains. If we don't get any, the action builder will
-      // know there is nothing to do related to OpenMP offloading.
-      auto OpenMPTCRange = C.getOffloadToolChains<Action::OFK_OpenMP>();
-      for (auto TI = OpenMPTCRange.first, TE = OpenMPTCRange.second; TI != TE;
-           ++TI)
-        ToolChains.push_back(TI->second);
-
-      DeviceLinkerInputs.resize(ToolChains.size());
-      return false;
-    }
-
-    bool canUseBundlerUnbundler() const override {
-      // OpenMP should use bundled files whenever possible.
-      return true;
-    }
-  };
-
-  ///
-  /// TODO: Add the implementation for other specialized builders here.
-  ///
-
-  /// Specialized builders being used by this offloading action builder.
-  SmallVector<DeviceActionBuilder *, 4> SpecializedBuilders;
-
-  /// Flag set to true if all valid builders allow file bundling/unbundling.
-  bool CanUseBundler;
-
-public:
-  OffloadingActionBuilder(Compilation &C, DerivedArgList &Args,
-                          const Driver::InputList &Inputs)
-      : C(C) {
-    // Create a specialized builder for each device toolchain.
-
-    IsValid = true;
-
-    // Create a specialized builder for CUDA.
-    SpecializedBuilders.push_back(new CudaActionBuilder(C, Args, Inputs));
-
-    // Create a specialized builder for HIP.
-    SpecializedBuilders.push_back(new HIPActionBuilder(C, Args, Inputs));
-
-    // Create a specialized builder for OpenMP.
-    SpecializedBuilders.push_back(new OpenMPActionBuilder(C, Args, Inputs));
-
-    //
-    // TODO: Build other specialized builders here.
-    //
-
-    // Initialize all the builders, keeping track of errors. If all valid
-    // builders agree that we can use bundling, set the flag to true.
-    unsigned ValidBuilders = 0u;
-    unsigned ValidBuildersSupportingBundling = 0u;
-    for (auto *SB : SpecializedBuilders) {
-      IsValid = IsValid && !SB->initialize();
-
-      // Update the counters if the builder is valid.
-      if (SB->isValid()) {
-        ++ValidBuilders;
-        if (SB->canUseBundlerUnbundler())
-          ++ValidBuildersSupportingBundling;
-      }
-    }
-    CanUseBundler =
-        ValidBuilders && ValidBuilders == ValidBuildersSupportingBundling;
-  }
-
-  ~OffloadingActionBuilder() {
-    for (auto *SB : SpecializedBuilders)
-      delete SB;
-  }
-
-  /// Generate an action that adds device dependences (if any) to a host action.
-  /// If no device dependence actions exist, just return the host action \a
-  /// HostAction. If an error is found or if no builder requires the host action
-  /// to be generated, return nullptr.
-  Action *
-  addDeviceDependencesToHostAction(Action *HostAction, const Arg *InputArg,
-                                   phases::ID CurPhase, phases::ID FinalPhase,
-                                   DeviceActionBuilder::PhasesTy &Phases) {
-    if (!IsValid)
-      return nullptr;
-
-    if (SpecializedBuilders.empty())
-      return HostAction;
-
-    assert(HostAction && "Invalid host action!");
-
-    OffloadAction::DeviceDependences DDeps;
-    // Check if all the programming models agree we should not emit the host
-    // action. Also, keep track of the offloading kinds employed.
-    auto &OffloadKind = InputArgToOffloadKindMap[InputArg];
-    unsigned InactiveBuilders = 0u;
-    unsigned IgnoringBuilders = 0u;
-    for (auto *SB : SpecializedBuilders) {
-      if (!SB->isValid()) {
-        ++InactiveBuilders;
-        continue;
-      }
-
-      auto RetCode =
-          SB->getDeviceDependences(DDeps, CurPhase, FinalPhase, Phases);
-
-      // If the builder explicitly says the host action should be ignored,
-      // we need to increment the variable that tracks the builders that request
-      // the host object to be ignored.
-      if (RetCode == DeviceActionBuilder::ABRT_Ignore_Host)
-        ++IgnoringBuilders;
-
-      // Unless the builder was inactive for this action, we have to record the
-      // offload kind because the host will have to use it.
-      if (RetCode != DeviceActionBuilder::ABRT_Inactive)
-        OffloadKind |= SB->getAssociatedOffloadKind();
-    }
-
-    // If all builders agree that the host object should be ignored, just return
-    // nullptr.
-    if (IgnoringBuilders &&
-        SpecializedBuilders.size() == (InactiveBuilders + IgnoringBuilders))
-      return nullptr;
-
-    if (DDeps.getActions().empty())
-      return HostAction;
-
-    // We have dependences we need to bundle together. We use an offload action
-    // for that.
-    OffloadAction::HostDependence HDep(
-        *HostAction, *C.getSingleOffloadToolChain<Action::OFK_Host>(),
-        /*BoundArch=*/nullptr, DDeps);
-    return C.MakeAction<OffloadAction>(HDep, DDeps);
-  }
-
-  /// Generate an action that adds a host dependence to a device action. The
-  /// results will be kept in this action builder. Return true if an error was
-  /// found.
-  bool addHostDependenceToDeviceActions(Action *&HostAction,
-                                        const Arg *InputArg) {
-    if (!IsValid)
-      return true;
-
-    // If we are supporting bundling/unbundling and the current action is an
-    // input action of non-source file, we replace the host action by the
-    // unbundling action. The bundler tool has the logic to detect if an input
-    // is a bundle or not and if the input is not a bundle it assumes it is a
-    // host file. Therefore it is safe to create an unbundling action even if
-    // the input is not a bundle.
-    if (CanUseBundler && isa<InputAction>(HostAction) &&
-        InputArg->getOption().getKind() == llvm::opt::Option::InputClass &&
-        !types::isSrcFile(HostAction->getType())) {
-      auto UnbundlingHostAction =
-          C.MakeAction<OffloadUnbundlingJobAction>(HostAction);
-      UnbundlingHostAction->registerDependentActionInfo(
-          C.getSingleOffloadToolChain<Action::OFK_Host>(),
-          /*BoundArch=*/StringRef(), Action::OFK_Host);
-      HostAction = UnbundlingHostAction;
-    }
-
-    assert(HostAction && "Invalid host action!");
-
-    // Register the offload kinds that are used.
-    auto &OffloadKind = InputArgToOffloadKindMap[InputArg];
-    for (auto *SB : SpecializedBuilders) {
-      if (!SB->isValid())
-        continue;
-
-      auto RetCode = SB->addDeviceDepences(HostAction);
-
-      // Host dependences for device actions are not compatible with that same
-      // action being ignored.
-      assert(RetCode != DeviceActionBuilder::ABRT_Ignore_Host &&
-             "Host dependence not expected to be ignored.!");
-
-      // Unless the builder was inactive for this action, we have to record the
-      // offload kind because the host will have to use it.
-      if (RetCode != DeviceActionBuilder::ABRT_Inactive)
-        OffloadKind |= SB->getAssociatedOffloadKind();
-    }
-
-    // Do not use unbundler if the Host does not depend on device action.
-    if (OffloadKind == Action::OFK_None && CanUseBundler)
-      if (auto *UA = dyn_cast<OffloadUnbundlingJobAction>(HostAction))
-        HostAction = UA->getInputs().back();
-
-    return false;
-  }
-
-  /// Add the offloading top level actions to the provided action list. This
-  /// function can replace the host action by a bundling action if the
-  /// programming models allow it.
-  bool appendTopLevelActions(ActionList &AL, Action *HostAction,
-                             const Arg *InputArg) {
-    // Get the device actions to be appended.
-    ActionList OffloadAL;
-    for (auto *SB : SpecializedBuilders) {
-      if (!SB->isValid())
-        continue;
-      SB->appendTopLevelActions(OffloadAL);
-    }
-
-    // If we can use the bundler, replace the host action by the bundling one in
-    // the resulting list. Otherwise, just append the device actions. For
-    // device only compilation, HostAction is a null pointer, therefore only do
-    // this when HostAction is not a null pointer.
-    if (CanUseBundler && HostAction && !OffloadAL.empty()) {
-      // Add the host action to the list in order to create the bundling action.
-      OffloadAL.push_back(HostAction);
-
-      // We expect that the host action was just appended to the action list
-      // before this method was called.
-      assert(HostAction == AL.back() && "Host action not in the list??");
-      HostAction = C.MakeAction<OffloadBundlingJobAction>(OffloadAL);
-      AL.back() = HostAction;
-    } else
-      AL.append(OffloadAL.begin(), OffloadAL.end());
-
-    // Propagate to the current host action (if any) the offload information
-    // associated with the current input.
-    if (HostAction)
-      HostAction->propagateHostOffloadInfo(InputArgToOffloadKindMap[InputArg],
-                                           /*BoundArch=*/nullptr);
-    return false;
-  }
-
-  /// Processes the host linker action. This currently consists of replacing it
-  /// with an offload action if there are device link objects and propagate to
-  /// the host action all the offload kinds used in the current compilation. The
-  /// resulting action is returned.
-  Action *processHostLinkAction(Action *HostAction) {
-    // Add all the dependences from the device linking actions.
-    OffloadAction::DeviceDependences DDeps;
-    for (auto *SB : SpecializedBuilders) {
-      if (!SB->isValid())
-        continue;
-
-      SB->appendLinkDependences(DDeps);
-    }
-
-    // Calculate all the offload kinds used in the current compilation.
-    unsigned ActiveOffloadKinds = 0u;
-    for (auto &I : InputArgToOffloadKindMap)
-      ActiveOffloadKinds |= I.second;
-
-    // If we don't have device dependencies, we don't have to create an offload
-    // action.
-    if (DDeps.getActions().empty()) {
-      // Propagate all the active kinds to host action. Given that it is a link
-      // action it is assumed to depend on all actions generated so far.
-      HostAction->propagateHostOffloadInfo(ActiveOffloadKinds,
-                                           /*BoundArch=*/nullptr);
-      return HostAction;
-    }
-
-    // Create the offload action with all dependences. When an offload action
-    // is created the kinds are propagated to the host action, so we don't have
-    // to do that explicitly here.
-    OffloadAction::HostDependence HDep(
-        *HostAction, *C.getSingleOffloadToolChain<Action::OFK_Host>(),
-        /*BoundArch*/ nullptr, ActiveOffloadKinds);
-    return C.MakeAction<OffloadAction>(HDep, DDeps);
-  }
-};
-} // anonymous namespace.
-
-void Driver::BuildActions(Compilation &C, DerivedArgList &Args,
-                          const InputList &Inputs, ActionList &Actions) const {
-  llvm::PrettyStackTraceString CrashInfo("Building compilation actions");
-
-  if (!SuppressMissingInputWarning && Inputs.empty()) {
-    Diag(clang::diag::err_drv_no_input_files);
-    return;
-  }
-
-  Arg *FinalPhaseArg;
-  phases::ID FinalPhase = getFinalPhase(Args, &FinalPhaseArg);
-
-  if (FinalPhase == phases::Link) {
-    if (Args.hasArg(options::OPT_emit_llvm))
-      Diag(clang::diag::err_drv_emit_llvm_link);
-    if (IsCLMode() && LTOMode != LTOK_None &&
-        !Args.getLastArgValue(options::OPT_fuse_ld_EQ).equals_lower("lld"))
-      Diag(clang::diag::err_drv_lto_without_lld);
-  }
-
-  // Reject -Z* at the top level, these options should never have been exposed
-  // by gcc.
-  if (Arg *A = Args.getLastArg(options::OPT_Z_Joined))
-    Diag(clang::diag::err_drv_use_of_Z_option) << A->getAsString(Args);
-
-  // Diagnose misuse of /Fo.
-  if (Arg *A = Args.getLastArg(options::OPT__SLASH_Fo)) {
-    StringRef V = A->getValue();
-    if (Inputs.size() > 1 && !V.empty() &&
-        !llvm::sys::path::is_separator(V.back())) {
-      // Check whether /Fo tries to name an output file for multiple inputs.
-      Diag(clang::diag::err_drv_out_file_argument_with_multiple_sources)
-          << A->getSpelling() << V;
-      Args.eraseArg(options::OPT__SLASH_Fo);
-    }
-  }
-
-  // Diagnose misuse of /Fa.
-  if (Arg *A = Args.getLastArg(options::OPT__SLASH_Fa)) {
-    StringRef V = A->getValue();
-    if (Inputs.size() > 1 && !V.empty() &&
-        !llvm::sys::path::is_separator(V.back())) {
-      // Check whether /Fa tries to name an asm file for multiple inputs.
-      Diag(clang::diag::err_drv_out_file_argument_with_multiple_sources)
-          << A->getSpelling() << V;
-      Args.eraseArg(options::OPT__SLASH_Fa);
-    }
-  }
-
-  // Diagnose misuse of /o.
-  if (Arg *A = Args.getLastArg(options::OPT__SLASH_o)) {
-    if (A->getValue()[0] == '\0') {
-      // It has to have a value.
-      Diag(clang::diag::err_drv_missing_argument) << A->getSpelling() << 1;
-      Args.eraseArg(options::OPT__SLASH_o);
-    }
-  }
-
-  // Ignore /Yc/Yu if both /Yc and /Yu passed but with different filenames.
-  Arg *YcArg = Args.getLastArg(options::OPT__SLASH_Yc);
-  Arg *YuArg = Args.getLastArg(options::OPT__SLASH_Yu);
-  if (YcArg && YuArg && strcmp(YcArg->getValue(), YuArg->getValue()) != 0) {
-    Diag(clang::diag::warn_drv_ycyu_different_arg_clang_cl);
-    Args.eraseArg(options::OPT__SLASH_Yc);
-    Args.eraseArg(options::OPT__SLASH_Yu);
-    YcArg = YuArg = nullptr;
-  }
-  if (YcArg && Inputs.size() > 1) {
-    Diag(clang::diag::warn_drv_yc_multiple_inputs_clang_cl);
-    Args.eraseArg(options::OPT__SLASH_Yc);
-    YcArg = nullptr;
-  }
-  if (FinalPhase == phases::Preprocess || Args.hasArg(options::OPT__SLASH_Y_)) {
-    // If only preprocessing or /Y- is used, all pch handling is disabled.
-    // Rather than check for it everywhere, just remove clang-cl pch-related
-    // flags here.
-    Args.eraseArg(options::OPT__SLASH_Fp);
-    Args.eraseArg(options::OPT__SLASH_Yc);
-    Args.eraseArg(options::OPT__SLASH_Yu);
-    YcArg = YuArg = nullptr;
-  }
-
-  // Builder to be used to build offloading actions.
-  OffloadingActionBuilder OffloadBuilder(C, Args, Inputs);
-
-  // Construct the actions to perform.
-  HeaderModulePrecompileJobAction *HeaderModuleAction = nullptr;
-  ActionList LinkerInputs;
-
-  llvm::SmallVector<phases::ID, phases::MaxNumberOfPhases> PL;
-  for (auto &I : Inputs) {
-    types::ID InputType = I.first;
-    const Arg *InputArg = I.second;
-
-    PL.clear();
-    types::getCompilationPhases(InputType, PL);
-
-    // If the first step comes after the final phase we are doing as part of
-    // this compilation, warn the user about it.
-    phases::ID InitialPhase = PL[0];
-    if (InitialPhase > FinalPhase) {
-      if (InputArg->isClaimed())
-        continue;
-
-      // Claim here to avoid the more general unused warning.
-      InputArg->claim();
-
-      // Suppress all unused style warnings with -Qunused-arguments
-      if (Args.hasArg(options::OPT_Qunused_arguments))
-        continue;
-
-      // Special case when final phase determined by binary name, rather than
-      // by a command-line argument with a corresponding Arg.
-      if (CCCIsCPP())
-        Diag(clang::diag::warn_drv_input_file_unused_by_cpp)
-            << InputArg->getAsString(Args) << getPhaseName(InitialPhase);
-      // Special case '-E' warning on a previously preprocessed file to make
-      // more sense.
-      else if (InitialPhase == phases::Compile &&
-               FinalPhase == phases::Preprocess &&
-               getPreprocessedType(InputType) == types::TY_INVALID)
-        Diag(clang::diag::warn_drv_preprocessed_input_file_unused)
-            << InputArg->getAsString(Args) << !!FinalPhaseArg
-            << (FinalPhaseArg ? FinalPhaseArg->getOption().getName() : "");
-      else
-        Diag(clang::diag::warn_drv_input_file_unused)
-            << InputArg->getAsString(Args) << getPhaseName(InitialPhase)
-            << !!FinalPhaseArg
-            << (FinalPhaseArg ? FinalPhaseArg->getOption().getName() : "");
-      continue;
-    }
-
-    if (YcArg) {
-      // Add a separate precompile phase for the compile phase.
-      if (FinalPhase >= phases::Compile) {
-        const types::ID HeaderType = lookupHeaderTypeForSourceType(InputType);
-        llvm::SmallVector<phases::ID, phases::MaxNumberOfPhases> PCHPL;
-        types::getCompilationPhases(HeaderType, PCHPL);
-        // Build the pipeline for the pch file.
-        Action *ClangClPch =
-            C.MakeAction<InputAction>(*InputArg, HeaderType);
-        for (phases::ID Phase : PCHPL)
-          ClangClPch = ConstructPhaseAction(C, Args, Phase, ClangClPch);
-        assert(ClangClPch);
-        Actions.push_back(ClangClPch);
-        // The driver currently exits after the first failed command.  This
-        // relies on that behavior, to make sure if the pch generation fails,
-        // the main compilation won't run.
-        // FIXME: If the main compilation fails, the PCH generation should
-        // probably not be considered successful either.
-      }
-    }
-
-    // Build the pipeline for this file.
-    Action *Current = C.MakeAction<InputAction>(*InputArg, InputType);
-
-    // Use the current host action in any of the offloading actions, if
-    // required.
-    if (OffloadBuilder.addHostDependenceToDeviceActions(Current, InputArg))
-      break;
-
-    for (SmallVectorImpl<phases::ID>::iterator i = PL.begin(), e = PL.end();
-         i != e; ++i) {
-      phases::ID Phase = *i;
-
-      // We are done if this step is past what the user requested.
-      if (Phase > FinalPhase)
-        break;
-
-      // Add any offload action the host action depends on.
-      Current = OffloadBuilder.addDeviceDependencesToHostAction(
-          Current, InputArg, Phase, FinalPhase, PL);
-      if (!Current)
-        break;
-
-      // Queue linker inputs.
-      if (Phase == phases::Link) {
-        assert((i + 1) == e && "linking must be final compilation step.");
-        LinkerInputs.push_back(Current);
-        Current = nullptr;
-        break;
-      }
-
-      // Each precompiled header file after a module file action is a module
-      // header of that same module file, rather than being compiled to a
-      // separate PCH.
-      if (Phase == phases::Precompile && HeaderModuleAction &&
-          getPrecompiledType(InputType) == types::TY_PCH) {
-        HeaderModuleAction->addModuleHeaderInput(Current);
-        Current = nullptr;
-        break;
-      }
-
-      // FIXME: Should we include any prior module file outputs as inputs of
-      // later actions in the same command line?
-
-      // Otherwise construct the appropriate action.
-      Action *NewCurrent = ConstructPhaseAction(C, Args, Phase, Current);
-
-      // We didn't create a new action, so we will just move to the next phase.
-      if (NewCurrent == Current)
-        continue;
-
-      if (auto *HMA = dyn_cast<HeaderModulePrecompileJobAction>(NewCurrent))
-        HeaderModuleAction = HMA;
-
-      Current = NewCurrent;
-
-      // Use the current host action in any of the offloading actions, if
-      // required.
-      if (OffloadBuilder.addHostDependenceToDeviceActions(Current, InputArg))
-        break;
-
-      if (Current->getType() == types::TY_Nothing)
-        break;
-    }
-
-    // If we ended with something, add to the output list.
-    if (Current)
-      Actions.push_back(Current);
-
-    // Add any top level actions generated for offloading.
-    OffloadBuilder.appendTopLevelActions(Actions, Current, InputArg);
-  }
-
-  // Add a link action if necessary.
-  if (!LinkerInputs.empty()) {
-    Action *LA = C.MakeAction<LinkJobAction>(LinkerInputs, types::TY_Image);
-    LA = OffloadBuilder.processHostLinkAction(LA);
-    Actions.push_back(LA);
-  }
-
-  // If we are linking, claim any options which are obviously only used for
-  // compilation.
-  if (FinalPhase == phases::Link && PL.size() == 1) {
-    Args.ClaimAllArgs(options::OPT_CompileOnly_Group);
-    Args.ClaimAllArgs(options::OPT_cl_compile_Group);
-  }
-
-  // Claim ignored clang-cl options.
-  Args.ClaimAllArgs(options::OPT_cl_ignored_Group);
-
-  // Claim --cuda-host-only and --cuda-compile-host-device, which may be passed
-  // to non-CUDA compilations and should not trigger warnings there.
-  Args.ClaimAllArgs(options::OPT_cuda_host_only);
-  Args.ClaimAllArgs(options::OPT_cuda_compile_host_device);
-}
-
-Action *Driver::ConstructPhaseAction(
-    Compilation &C, const ArgList &Args, phases::ID Phase, Action *Input,
-    Action::OffloadKind TargetDeviceOffloadKind) const {
-  llvm::PrettyStackTraceString CrashInfo("Constructing phase actions");
-
-  // Some types skip the assembler phase (e.g., llvm-bc), but we can't
-  // encode this in the steps because the intermediate type depends on
-  // arguments. Just special case here.
-  if (Phase == phases::Assemble && Input->getType() != types::TY_PP_Asm)
-    return Input;
-
-  // Build the appropriate action.
-  switch (Phase) {
-  case phases::Link:
-    llvm_unreachable("link action invalid here.");
-  case phases::Preprocess: {
-    types::ID OutputTy;
-    // -{M, MM} alter the output type.
-    if (Args.hasArg(options::OPT_M, options::OPT_MM)) {
-      OutputTy = types::TY_Dependencies;
-    } else {
-      OutputTy = Input->getType();
-      if (!Args.hasFlag(options::OPT_frewrite_includes,
-                        options::OPT_fno_rewrite_includes, false) &&
-          !Args.hasFlag(options::OPT_frewrite_imports,
-                        options::OPT_fno_rewrite_imports, false) &&
-          !CCGenDiagnostics)
-        OutputTy = types::getPreprocessedType(OutputTy);
-      assert(OutputTy != types::TY_INVALID &&
-             "Cannot preprocess this input type!");
-    }
-    return C.MakeAction<PreprocessJobAction>(Input, OutputTy);
-  }
-  case phases::Precompile: {
-    types::ID OutputTy = getPrecompiledType(Input->getType());
-    assert(OutputTy != types::TY_INVALID &&
-           "Cannot precompile this input type!");
-
-    // If we're given a module name, precompile header file inputs as a
-    // module, not as a precompiled header.
-    const char *ModName = nullptr;
-    if (OutputTy == types::TY_PCH) {
-      if (Arg *A = Args.getLastArg(options::OPT_fmodule_name_EQ))
-        ModName = A->getValue();
-      if (ModName)
-        OutputTy = types::TY_ModuleFile;
-    }
-
-    if (Args.hasArg(options::OPT_fsyntax_only)) {
-      // Syntax checks should not emit a PCH file
-      OutputTy = types::TY_Nothing;
-    }
-
-    if (ModName)
-      return C.MakeAction<HeaderModulePrecompileJobAction>(Input, OutputTy,
-                                                           ModName);
-    return C.MakeAction<PrecompileJobAction>(Input, OutputTy);
-  }
-  case phases::Compile: {
-    if (Args.hasArg(options::OPT_fsyntax_only))
-      return C.MakeAction<CompileJobAction>(Input, types::TY_Nothing);
-    if (Args.hasArg(options::OPT_rewrite_objc))
-      return C.MakeAction<CompileJobAction>(Input, types::TY_RewrittenObjC);
-    if (Args.hasArg(options::OPT_rewrite_legacy_objc))
-      return C.MakeAction<CompileJobAction>(Input,
-                                            types::TY_RewrittenLegacyObjC);
-    if (Args.hasArg(options::OPT__analyze, options::OPT__analyze_auto))
-      return C.MakeAction<AnalyzeJobAction>(Input, types::TY_Plist);
-    if (Args.hasArg(options::OPT__migrate))
-      return C.MakeAction<MigrateJobAction>(Input, types::TY_Remap);
-    if (Args.hasArg(options::OPT_emit_ast))
-      return C.MakeAction<CompileJobAction>(Input, types::TY_AST);
-    if (Args.hasArg(options::OPT_module_file_info))
-      return C.MakeAction<CompileJobAction>(Input, types::TY_ModuleFile);
-    if (Args.hasArg(options::OPT_verify_pch))
-      return C.MakeAction<VerifyPCHJobAction>(Input, types::TY_Nothing);
-    return C.MakeAction<CompileJobAction>(Input, types::TY_LLVM_BC);
-  }
-  case phases::Backend: {
-    if (isUsingLTO() && TargetDeviceOffloadKind == Action::OFK_None) {
-      types::ID Output =
-          Args.hasArg(options::OPT_S) ? types::TY_LTO_IR : types::TY_LTO_BC;
-      return C.MakeAction<BackendJobAction>(Input, Output);
-    }
-    if (Args.hasArg(options::OPT_emit_llvm)) {
-      types::ID Output =
-          Args.hasArg(options::OPT_S) ? types::TY_LLVM_IR : types::TY_LLVM_BC;
-      return C.MakeAction<BackendJobAction>(Input, Output);
-    }
-    return C.MakeAction<BackendJobAction>(Input, types::TY_PP_Asm);
-  }
-  case phases::Assemble:
-    return C.MakeAction<AssembleJobAction>(std::move(Input), types::TY_Object);
-  }
-
-  llvm_unreachable("invalid phase in ConstructPhaseAction");
-}
-
-void Driver::BuildJobs(Compilation &C) const {
-  llvm::PrettyStackTraceString CrashInfo("Building compilation jobs");
-
-  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 (const Action *A : C.getActions())
-      if (A->getType() != types::TY_Nothing)
-        ++NumOutputs;
-
-    if (NumOutputs > 1) {
-      Diag(clang::diag::err_drv_output_argument_with_multiple_files);
-      FinalOutput = nullptr;
-    }
-  }
-
-  // Collect the list of architectures.
-  llvm::StringSet<> ArchNames;
-  if (C.getDefaultToolChain().getTriple().isOSBinFormatMachO())
-    for (const Arg *A : C.getArgs())
-      if (A->getOption().matches(options::OPT_arch))
-        ArchNames.insert(A->getValue());
-
-  // Set of (Action, canonical ToolChain triple) pairs we've built jobs for.
-  std::map<std::pair<const Action *, std::string>, InputInfo> CachedResults;
-  for (Action *A : C.getActions()) {
-    // 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 = nullptr;
-    if (isa<LipoJobAction>(A)) {
-      if (FinalOutput)
-        LinkingOutput = FinalOutput->getValue();
-      else
-        LinkingOutput = getDefaultImageName();
-    }
-
-    BuildJobsForAction(C, A, &C.getDefaultToolChain(),
-                       /*BoundArch*/ StringRef(),
-                       /*AtTopLevel*/ true,
-                       /*MultipleArchs*/ ArchNames.size() > 1,
-                       /*LinkingOutput*/ LinkingOutput, CachedResults,
-                       /*TargetDeviceOffloadKind*/ Action::OFK_None);
-  }
-
-  // If the user passed -Qunused-arguments or there were errors, don't warn
-  // about any unused arguments.
-  if (Diags.hasErrorOccurred() ||
-      C.getArgs().hasArg(options::OPT_Qunused_arguments))
-    return;
-
-  // Claim -### here.
-  (void)C.getArgs().hasArg(options::OPT__HASH_HASH_HASH);
-
-  // Claim --driver-mode, --rsp-quoting, it was handled earlier.
-  (void)C.getArgs().hasArg(options::OPT_driver_mode);
-  (void)C.getArgs().hasArg(options::OPT_rsp_quoting);
-
-  for (Arg *A : C.getArgs()) {
-    // FIXME: It would be nice to be able to send the argument to the
-    // DiagnosticsEngine, so that extra values, position, and so on could be
-    // printed.
-    if (!A->isClaimed()) {
-      if (A->getOption().hasFlag(options::NoArgumentUnused))
-        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 (Opt.getKind() == Option::FlagClass) {
-        bool DuplicateClaimed = false;
-
-        for (const Arg *AA : C.getArgs().filtered(&Opt)) {
-          if (AA->isClaimed()) {
-            DuplicateClaimed = true;
-            break;
-          }
-        }
-
-        if (DuplicateClaimed)
-          continue;
-      }
-
-      // In clang-cl, don't mention unknown arguments here since they have
-      // already been warned about.
-      if (!IsCLMode() || !A->getOption().matches(options::OPT_UNKNOWN))
-        Diag(clang::diag::warn_drv_unused_argument)
-            << A->getAsString(C.getArgs());
-    }
-  }
-}
-
-namespace {
-/// Utility class to control the collapse of dependent actions and select the
-/// tools accordingly.
-class ToolSelector final {
-  /// The tool chain this selector refers to.
-  const ToolChain &TC;
-
-  /// The compilation this selector refers to.
-  const Compilation &C;
-
-  /// The base action this selector refers to.
-  const JobAction *BaseAction;
-
-  /// Set to true if the current toolchain refers to host actions.
-  bool IsHostSelector;
-
-  /// Set to true if save-temps and embed-bitcode functionalities are active.
-  bool SaveTemps;
-  bool EmbedBitcode;
-
-  /// Get previous dependent action or null if that does not exist. If
-  /// \a CanBeCollapsed is false, that action must be legal to collapse or
-  /// null will be returned.
-  const JobAction *getPrevDependentAction(const ActionList &Inputs,
-                                          ActionList &SavedOffloadAction,
-                                          bool CanBeCollapsed = true) {
-    // An option can be collapsed only if it has a single input.
-    if (Inputs.size() != 1)
-      return nullptr;
-
-    Action *CurAction = *Inputs.begin();
-    if (CanBeCollapsed &&
-        !CurAction->isCollapsingWithNextDependentActionLegal())
-      return nullptr;
-
-    // If the input action is an offload action. Look through it and save any
-    // offload action that can be dropped in the event of a collapse.
-    if (auto *OA = dyn_cast<OffloadAction>(CurAction)) {
-      // If the dependent action is a device action, we will attempt to collapse
-      // only with other device actions. Otherwise, we would do the same but
-      // with host actions only.
-      if (!IsHostSelector) {
-        if (OA->hasSingleDeviceDependence(/*DoNotConsiderHostActions=*/true)) {
-          CurAction =
-              OA->getSingleDeviceDependence(/*DoNotConsiderHostActions=*/true);
-          if (CanBeCollapsed &&
-              !CurAction->isCollapsingWithNextDependentActionLegal())
-            return nullptr;
-          SavedOffloadAction.push_back(OA);
-          return dyn_cast<JobAction>(CurAction);
-        }
-      } else if (OA->hasHostDependence()) {
-        CurAction = OA->getHostDependence();
-        if (CanBeCollapsed &&
-            !CurAction->isCollapsingWithNextDependentActionLegal())
-          return nullptr;
-        SavedOffloadAction.push_back(OA);
-        return dyn_cast<JobAction>(CurAction);
-      }
-      return nullptr;
-    }
-
-    return dyn_cast<JobAction>(CurAction);
-  }
-
-  /// Return true if an assemble action can be collapsed.
-  bool canCollapseAssembleAction() const {
-    return TC.useIntegratedAs() && !SaveTemps &&
-           !C.getArgs().hasArg(options::OPT_via_file_asm) &&
-           !C.getArgs().hasArg(options::OPT__SLASH_FA) &&
-           !C.getArgs().hasArg(options::OPT__SLASH_Fa);
-  }
-
-  /// Return true if a preprocessor action can be collapsed.
-  bool canCollapsePreprocessorAction() const {
-    return !C.getArgs().hasArg(options::OPT_no_integrated_cpp) &&
-           !C.getArgs().hasArg(options::OPT_traditional_cpp) && !SaveTemps &&
-           !C.getArgs().hasArg(options::OPT_rewrite_objc);
-  }
-
-  /// Struct that relates an action with the offload actions that would be
-  /// collapsed with it.
-  struct JobActionInfo final {
-    /// The action this info refers to.
-    const JobAction *JA = nullptr;
-    /// The offload actions we need to take care off if this action is
-    /// collapsed.
-    ActionList SavedOffloadAction;
-  };
-
-  /// Append collapsed offload actions from the give nnumber of elements in the
-  /// action info array.
-  static void AppendCollapsedOffloadAction(ActionList &CollapsedOffloadAction,
-                                           ArrayRef<JobActionInfo> &ActionInfo,
-                                           unsigned ElementNum) {
-    assert(ElementNum <= ActionInfo.size() && "Invalid number of elements.");
-    for (unsigned I = 0; I < ElementNum; ++I)
-      CollapsedOffloadAction.append(ActionInfo[I].SavedOffloadAction.begin(),
-                                    ActionInfo[I].SavedOffloadAction.end());
-  }
-
-  /// Functions that attempt to perform the combining. They detect if that is
-  /// legal, and if so they update the inputs \a Inputs and the offload action
-  /// that were collapsed in \a CollapsedOffloadAction. A tool that deals with
-  /// the combined action is returned. If the combining is not legal or if the
-  /// tool does not exist, null is returned.
-  /// Currently three kinds of collapsing are supported:
-  ///  - Assemble + Backend + Compile;
-  ///  - Assemble + Backend ;
-  ///  - Backend + Compile.
-  const Tool *
-  combineAssembleBackendCompile(ArrayRef<JobActionInfo> ActionInfo,
-                                ActionList &Inputs,
-                                ActionList &CollapsedOffloadAction) {
-    if (ActionInfo.size() < 3 || !canCollapseAssembleAction())
-      return nullptr;
-    auto *AJ = dyn_cast<AssembleJobAction>(ActionInfo[0].JA);
-    auto *BJ = dyn_cast<BackendJobAction>(ActionInfo[1].JA);
-    auto *CJ = dyn_cast<CompileJobAction>(ActionInfo[2].JA);
-    if (!AJ || !BJ || !CJ)
-      return nullptr;
-
-    // Get compiler tool.
-    const Tool *T = TC.SelectTool(*CJ);
-    if (!T)
-      return nullptr;
-
-    // When using -fembed-bitcode, it is required to have the same tool (clang)
-    // for both CompilerJA and BackendJA. Otherwise, combine two stages.
-    if (EmbedBitcode) {
-      const Tool *BT = TC.SelectTool(*BJ);
-      if (BT == T)
-        return nullptr;
-    }
-
-    if (!T->hasIntegratedAssembler())
-      return nullptr;
-
-    Inputs = CJ->getInputs();
-    AppendCollapsedOffloadAction(CollapsedOffloadAction, ActionInfo,
-                                 /*NumElements=*/3);
-    return T;
-  }
-  const Tool *combineAssembleBackend(ArrayRef<JobActionInfo> ActionInfo,
-                                     ActionList &Inputs,
-                                     ActionList &CollapsedOffloadAction) {
-    if (ActionInfo.size() < 2 || !canCollapseAssembleAction())
-      return nullptr;
-    auto *AJ = dyn_cast<AssembleJobAction>(ActionInfo[0].JA);
-    auto *BJ = dyn_cast<BackendJobAction>(ActionInfo[1].JA);
-    if (!AJ || !BJ)
-      return nullptr;
-
-    // Retrieve the compile job, backend action must always be preceded by one.
-    ActionList CompileJobOffloadActions;
-    auto *CJ = getPrevDependentAction(BJ->getInputs(), CompileJobOffloadActions,
-                                      /*CanBeCollapsed=*/false);
-    if (!AJ || !BJ || !CJ)
-      return nullptr;
-
-    assert(isa<CompileJobAction>(CJ) &&
-           "Expecting compile job preceding backend job.");
-
-    // Get compiler tool.
-    const Tool *T = TC.SelectTool(*CJ);
-    if (!T)
-      return nullptr;
-
-    if (!T->hasIntegratedAssembler())
-      return nullptr;
-
-    Inputs = BJ->getInputs();
-    AppendCollapsedOffloadAction(CollapsedOffloadAction, ActionInfo,
-                                 /*NumElements=*/2);
-    return T;
-  }
-  const Tool *combineBackendCompile(ArrayRef<JobActionInfo> ActionInfo,
-                                    ActionList &Inputs,
-                                    ActionList &CollapsedOffloadAction) {
-    if (ActionInfo.size() < 2)
-      return nullptr;
-    auto *BJ = dyn_cast<BackendJobAction>(ActionInfo[0].JA);
-    auto *CJ = dyn_cast<CompileJobAction>(ActionInfo[1].JA);
-    if (!BJ || !CJ)
-      return nullptr;
-
-    // Check if the initial input (to the compile job or its predessor if one
-    // exists) is LLVM bitcode. In that case, no preprocessor step is required
-    // and we can still collapse the compile and backend jobs when we have
-    // -save-temps. I.e. there is no need for a separate compile job just to
-    // emit unoptimized bitcode.
-    bool InputIsBitcode = true;
-    for (size_t i = 1; i < ActionInfo.size(); i++)
-      if (ActionInfo[i].JA->getType() != types::TY_LLVM_BC &&
-          ActionInfo[i].JA->getType() != types::TY_LTO_BC) {
-        InputIsBitcode = false;
-        break;
-      }
-    if (!InputIsBitcode && !canCollapsePreprocessorAction())
-      return nullptr;
-
-    // Get compiler tool.
-    const Tool *T = TC.SelectTool(*CJ);
-    if (!T)
-      return nullptr;
-
-    if (T->canEmitIR() && ((SaveTemps && !InputIsBitcode) || EmbedBitcode))
-      return nullptr;
-
-    Inputs = CJ->getInputs();
-    AppendCollapsedOffloadAction(CollapsedOffloadAction, ActionInfo,
-                                 /*NumElements=*/2);
-    return T;
-  }
-
-  /// Updates the inputs if the obtained tool supports combining with
-  /// preprocessor action, and the current input is indeed a preprocessor
-  /// action. If combining results in the collapse of offloading actions, those
-  /// are appended to \a CollapsedOffloadAction.
-  void combineWithPreprocessor(const Tool *T, ActionList &Inputs,
-                               ActionList &CollapsedOffloadAction) {
-    if (!T || !canCollapsePreprocessorAction() || !T->hasIntegratedCPP())
-      return;
-
-    // Attempt to get a preprocessor action dependence.
-    ActionList PreprocessJobOffloadActions;
-    ActionList NewInputs;
-    for (Action *A : Inputs) {
-      auto *PJ = getPrevDependentAction({A}, PreprocessJobOffloadActions);
-      if (!PJ || !isa<PreprocessJobAction>(PJ)) {
-        NewInputs.push_back(A);
-        continue;
-      }
-
-      // This is legal to combine. Append any offload action we found and add the
-      // current input to preprocessor inputs.
-      CollapsedOffloadAction.append(PreprocessJobOffloadActions.begin(),
-                                    PreprocessJobOffloadActions.end());
-      NewInputs.append(PJ->input_begin(), PJ->input_end());
-    }
-    Inputs = NewInputs;
-  }
-
-public:
-  ToolSelector(const JobAction *BaseAction, const ToolChain &TC,
-               const Compilation &C, bool SaveTemps, bool EmbedBitcode)
-      : TC(TC), C(C), BaseAction(BaseAction), SaveTemps(SaveTemps),
-        EmbedBitcode(EmbedBitcode) {
-    assert(BaseAction && "Invalid base action.");
-    IsHostSelector = BaseAction->getOffloadingDeviceKind() == Action::OFK_None;
-  }
-
-  /// Check if a chain of actions can be combined and return the tool that can
-  /// handle the combination of actions. The pointer to the current inputs \a
-  /// Inputs and the list of offload actions \a CollapsedOffloadActions
-  /// connected to collapsed actions are updated accordingly. The latter enables
-  /// the caller of the selector to process them afterwards instead of just
-  /// dropping them. If no suitable tool is found, null will be returned.
-  const Tool *getTool(ActionList &Inputs,
-                      ActionList &CollapsedOffloadAction) {
-    //
-    // Get the largest chain of actions that we could combine.
-    //
-
-    SmallVector<JobActionInfo, 5> ActionChain(1);
-    ActionChain.back().JA = BaseAction;
-    while (ActionChain.back().JA) {
-      const Action *CurAction = ActionChain.back().JA;
-
-      // Grow the chain by one element.
-      ActionChain.resize(ActionChain.size() + 1);
-      JobActionInfo &AI = ActionChain.back();
-
-      // Attempt to fill it with the
-      AI.JA =
-          getPrevDependentAction(CurAction->getInputs(), AI.SavedOffloadAction);
-    }
-
-    // Pop the last action info as it could not be filled.
-    ActionChain.pop_back();
-
-    //
-    // Attempt to combine actions. If all combining attempts failed, just return
-    // the tool of the provided action. At the end we attempt to combine the
-    // action with any preprocessor action it may depend on.
-    //
-
-    const Tool *T = combineAssembleBackendCompile(ActionChain, Inputs,
-                                                  CollapsedOffloadAction);
-    if (!T)
-      T = combineAssembleBackend(ActionChain, Inputs, CollapsedOffloadAction);
-    if (!T)
-      T = combineBackendCompile(ActionChain, Inputs, CollapsedOffloadAction);
-    if (!T) {
-      Inputs = BaseAction->getInputs();
-      T = TC.SelectTool(*BaseAction);
-    }
-
-    combineWithPreprocessor(T, Inputs, CollapsedOffloadAction);
-    return T;
-  }
-};
-}
-
-/// Return a string that uniquely identifies the result of a job. The bound arch
-/// is not necessarily represented in the toolchain's triple -- for example,
-/// armv7 and armv7s both map to the same triple -- so we need both in our map.
-/// Also, we need to add the offloading device kind, as the same tool chain can
-/// be used for host and device for some programming models, e.g. OpenMP.
-static std::string GetTriplePlusArchString(const ToolChain *TC,
-                                           StringRef BoundArch,
-                                           Action::OffloadKind OffloadKind) {
-  std::string TriplePlusArch = TC->getTriple().normalize();
-  if (!BoundArch.empty()) {
-    TriplePlusArch += "-";
-    TriplePlusArch += BoundArch;
-  }
-  TriplePlusArch += "-";
-  TriplePlusArch += Action::GetOffloadKindName(OffloadKind);
-  return TriplePlusArch;
-}
-
-InputInfo Driver::BuildJobsForAction(
-    Compilation &C, const Action *A, const ToolChain *TC, StringRef BoundArch,
-    bool AtTopLevel, bool MultipleArchs, const char *LinkingOutput,
-    std::map<std::pair<const Action *, std::string>, InputInfo> &CachedResults,
-    Action::OffloadKind TargetDeviceOffloadKind) const {
-  std::pair<const Action *, std::string> ActionTC = {
-      A, GetTriplePlusArchString(TC, BoundArch, TargetDeviceOffloadKind)};
-  auto CachedResult = CachedResults.find(ActionTC);
-  if (CachedResult != CachedResults.end()) {
-    return CachedResult->second;
-  }
-  InputInfo Result = BuildJobsForActionNoCache(
-      C, A, TC, BoundArch, AtTopLevel, MultipleArchs, LinkingOutput,
-      CachedResults, TargetDeviceOffloadKind);
-  CachedResults[ActionTC] = Result;
-  return Result;
-}
-
-InputInfo Driver::BuildJobsForActionNoCache(
-    Compilation &C, const Action *A, const ToolChain *TC, StringRef BoundArch,
-    bool AtTopLevel, bool MultipleArchs, const char *LinkingOutput,
-    std::map<std::pair<const Action *, std::string>, InputInfo> &CachedResults,
-    Action::OffloadKind TargetDeviceOffloadKind) const {
-  llvm::PrettyStackTraceString CrashInfo("Building compilation jobs");
-
-  InputInfoList OffloadDependencesInputInfo;
-  bool BuildingForOffloadDevice = TargetDeviceOffloadKind != Action::OFK_None;
-  if (const OffloadAction *OA = dyn_cast<OffloadAction>(A)) {
-    // The 'Darwin' toolchain is initialized only when its arguments are
-    // computed. Get the default arguments for OFK_None to ensure that
-    // initialization is performed before processing the offload action.
-    // FIXME: Remove when darwin's toolchain is initialized during construction.
-    C.getArgsForToolChain(TC, BoundArch, Action::OFK_None);
-
-    // The offload action is expected to be used in four different situations.
-    //
-    // a) Set a toolchain/architecture/kind for a host action:
-    //    Host Action 1 -> OffloadAction -> Host Action 2
-    //
-    // b) Set a toolchain/architecture/kind for a device action;
-    //    Device Action 1 -> OffloadAction -> Device Action 2
-    //
-    // c) Specify a device dependence to a host action;
-    //    Device Action 1  _
-    //                      \
-    //      Host Action 1  ---> OffloadAction -> Host Action 2
-    //
-    // d) Specify a host dependence to a device action.
-    //      Host Action 1  _
-    //                      \
-    //    Device Action 1  ---> OffloadAction -> Device Action 2
-    //
-    // For a) and b), we just return the job generated for the dependence. For
-    // c) and d) we override the current action with the host/device dependence
-    // if the current toolchain is host/device and set the offload dependences
-    // info with the jobs obtained from the device/host dependence(s).
-
-    // If there is a single device option, just generate the job for it.
-    if (OA->hasSingleDeviceDependence()) {
-      InputInfo DevA;
-      OA->doOnEachDeviceDependence([&](Action *DepA, const ToolChain *DepTC,
-                                       const char *DepBoundArch) {
-        DevA =
-            BuildJobsForAction(C, DepA, DepTC, DepBoundArch, AtTopLevel,
-                               /*MultipleArchs*/ !!DepBoundArch, LinkingOutput,
-                               CachedResults, DepA->getOffloadingDeviceKind());
-      });
-      return DevA;
-    }
-
-    // If 'Action 2' is host, we generate jobs for the device dependences and
-    // override the current action with the host dependence. Otherwise, we
-    // generate the host dependences and override the action with the device
-    // dependence. The dependences can't therefore be a top-level action.
-    OA->doOnEachDependence(
-        /*IsHostDependence=*/BuildingForOffloadDevice,
-        [&](Action *DepA, const ToolChain *DepTC, const char *DepBoundArch) {
-          OffloadDependencesInputInfo.push_back(BuildJobsForAction(
-              C, DepA, DepTC, DepBoundArch, /*AtTopLevel=*/false,
-              /*MultipleArchs*/ !!DepBoundArch, LinkingOutput, CachedResults,
-              DepA->getOffloadingDeviceKind()));
-        });
-
-    A = BuildingForOffloadDevice
-            ? OA->getSingleDeviceDependence(/*DoNotConsiderHostActions=*/true)
-            : OA->getHostDependence();
-  }
-
-  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 (Input.getOption().matches(options::OPT_INPUT)) {
-      const char *Name = Input.getValue();
-      return InputInfo(A, Name, /* BaseInput = */ Name);
-    }
-    return InputInfo(A, &Input, /* BaseInput = */ "");
-  }
-
-  if (const BindArchAction *BAA = dyn_cast<BindArchAction>(A)) {
-    const ToolChain *TC;
-    StringRef ArchName = BAA->getArchName();
-
-    if (!ArchName.empty())
-      TC = &getToolChain(C.getArgs(),
-                         computeTargetTriple(*this, TargetTriple,
-                                             C.getArgs(), ArchName));
-    else
-      TC = &C.getDefaultToolChain();
-
-    return BuildJobsForAction(C, *BAA->input_begin(), TC, ArchName, AtTopLevel,
-                              MultipleArchs, LinkingOutput, CachedResults,
-                              TargetDeviceOffloadKind);
-  }
-
-
-  ActionList Inputs = A->getInputs();
-
-  const JobAction *JA = cast<JobAction>(A);
-  ActionList CollapsedOffloadActions;
-
-  ToolSelector TS(JA, *TC, C, isSaveTempsEnabled(),
-                  embedBitcodeInObject() && !isUsingLTO());
-  const Tool *T = TS.getTool(Inputs, CollapsedOffloadActions);
-
-  if (!T)
-    return InputInfo();
-
-  // If we've collapsed action list that contained OffloadAction we
-  // need to build jobs for host/device-side inputs it may have held.
-  for (const auto *OA : CollapsedOffloadActions)
-    cast<OffloadAction>(OA)->doOnEachDependence(
-        /*IsHostDependence=*/BuildingForOffloadDevice,
-        [&](Action *DepA, const ToolChain *DepTC, const char *DepBoundArch) {
-          OffloadDependencesInputInfo.push_back(BuildJobsForAction(
-              C, DepA, DepTC, DepBoundArch, /* AtTopLevel */ false,
-              /*MultipleArchs=*/!!DepBoundArch, LinkingOutput, CachedResults,
-              DepA->getOffloadingDeviceKind()));
-        });
-
-  // Only use pipes when there is exactly one input.
-  InputInfoList InputInfos;
-  for (const Action *Input : Inputs) {
-    // Treat dsymutil and verify sub-jobs as being at the top-level too, they
-    // shouldn't get temporary output names.
-    // FIXME: Clean this up.
-    bool SubJobAtTopLevel =
-        AtTopLevel && (isa<DsymutilJobAction>(A) || isa<VerifyJobAction>(A));
-    InputInfos.push_back(BuildJobsForAction(
-        C, Input, TC, BoundArch, SubJobAtTopLevel, MultipleArchs, LinkingOutput,
-        CachedResults, A->getOffloadingDeviceKind()));
-  }
-
-  // Always use the first input as the base input.
-  const char *BaseInput = InputInfos[0].getBaseInput();
-
-  // ... except dsymutil actions, which use their actual input as the base
-  // input.
-  if (JA->getType() == types::TY_dSYM)
-    BaseInput = InputInfos[0].getFilename();
-
-  // ... and in header module compilations, which use the module name.
-  if (auto *ModuleJA = dyn_cast<HeaderModulePrecompileJobAction>(JA))
-    BaseInput = ModuleJA->getModuleName();
-
-  // Append outputs of offload device jobs to the input list
-  if (!OffloadDependencesInputInfo.empty())
-    InputInfos.append(OffloadDependencesInputInfo.begin(),
-                      OffloadDependencesInputInfo.end());
-
-  // Set the effective triple of the toolchain for the duration of this job.
-  llvm::Triple EffectiveTriple;
-  const ToolChain &ToolTC = T->getToolChain();
-  const ArgList &Args =
-      C.getArgsForToolChain(TC, BoundArch, A->getOffloadingDeviceKind());
-  if (InputInfos.size() != 1) {
-    EffectiveTriple = llvm::Triple(ToolTC.ComputeEffectiveClangTriple(Args));
-  } else {
-    // Pass along the input type if it can be unambiguously determined.
-    EffectiveTriple = llvm::Triple(
-        ToolTC.ComputeEffectiveClangTriple(Args, InputInfos[0].getType()));
-  }
-  RegisterEffectiveTriple TripleRAII(ToolTC, EffectiveTriple);
-
-  // Determine the place to write output to, if any.
-  InputInfo Result;
-  InputInfoList UnbundlingResults;
-  if (auto *UA = dyn_cast<OffloadUnbundlingJobAction>(JA)) {
-    // If we have an unbundling job, we need to create results for all the
-    // outputs. We also update the results cache so that other actions using
-    // this unbundling action can get the right results.
-    for (auto &UI : UA->getDependentActionsInfo()) {
-      assert(UI.DependentOffloadKind != Action::OFK_None &&
-             "Unbundling with no offloading??");
-
-      // Unbundling actions are never at the top level. When we generate the
-      // offloading prefix, we also do that for the host file because the
-      // unbundling action does not change the type of the output which can
-      // cause a overwrite.
-      std::string OffloadingPrefix = Action::GetOffloadingFileNamePrefix(
-          UI.DependentOffloadKind,
-          UI.DependentToolChain->getTriple().normalize(),
-          /*CreatePrefixForHost=*/true);
-      auto CurI = InputInfo(
-          UA,
-          GetNamedOutputPath(C, *UA, BaseInput, UI.DependentBoundArch,
-                             /*AtTopLevel=*/false,
-                             MultipleArchs ||
-                                 UI.DependentOffloadKind == Action::OFK_HIP,
-                             OffloadingPrefix),
-          BaseInput);
-      // Save the unbundling result.
-      UnbundlingResults.push_back(CurI);
-
-      // Get the unique string identifier for this dependence and cache the
-      // result.
-      StringRef Arch;
-      if (TargetDeviceOffloadKind == Action::OFK_HIP) {
-        if (UI.DependentOffloadKind == Action::OFK_Host)
-          Arch = StringRef();
-        else
-          Arch = UI.DependentBoundArch;
-      } else
-        Arch = BoundArch;
-
-      CachedResults[{A, GetTriplePlusArchString(UI.DependentToolChain, Arch,
-                                                UI.DependentOffloadKind)}] =
-          CurI;
-    }
-
-    // Now that we have all the results generated, select the one that should be
-    // returned for the current depending action.
-    std::pair<const Action *, std::string> ActionTC = {
-        A, GetTriplePlusArchString(TC, BoundArch, TargetDeviceOffloadKind)};
-    assert(CachedResults.find(ActionTC) != CachedResults.end() &&
-           "Result does not exist??");
-    Result = CachedResults[ActionTC];
-  } else if (JA->getType() == types::TY_Nothing)
-    Result = InputInfo(A, BaseInput);
-  else {
-    // We only have to generate a prefix for the host if this is not a top-level
-    // action.
-    std::string OffloadingPrefix = Action::GetOffloadingFileNamePrefix(
-        A->getOffloadingDeviceKind(), TC->getTriple().normalize(),
-        /*CreatePrefixForHost=*/!!A->getOffloadingHostActiveKinds() &&
-            !AtTopLevel);
-    Result = InputInfo(A, GetNamedOutputPath(C, *JA, BaseInput, BoundArch,
-                                             AtTopLevel, MultipleArchs,
-                                             OffloadingPrefix),
-                       BaseInput);
-  }
-
-  if (CCCPrintBindings && !CCGenDiagnostics) {
-    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() << ", ";
-    }
-    if (UnbundlingResults.empty())
-      llvm::errs() << "], output: " << Result.getAsString() << "\n";
-    else {
-      llvm::errs() << "], outputs: [";
-      for (unsigned i = 0, e = UnbundlingResults.size(); i != e; ++i) {
-        llvm::errs() << UnbundlingResults[i].getAsString();
-        if (i + 1 != e)
-          llvm::errs() << ", ";
-      }
-      llvm::errs() << "] \n";
-    }
-  } else {
-    if (UnbundlingResults.empty())
-      T->ConstructJob(
-          C, *JA, Result, InputInfos,
-          C.getArgsForToolChain(TC, BoundArch, JA->getOffloadingDeviceKind()),
-          LinkingOutput);
-    else
-      T->ConstructJobMultipleOutputs(
-          C, *JA, UnbundlingResults, InputInfos,
-          C.getArgsForToolChain(TC, BoundArch, JA->getOffloadingDeviceKind()),
-          LinkingOutput);
-  }
-  return Result;
-}
-
-const char *Driver::getDefaultImageName() const {
-  llvm::Triple Target(llvm::Triple::normalize(TargetTriple));
-  return Target.isOSWindows() ? "a.exe" : "a.out";
-}
-
-/// Create output filename based on ArgValue, which could either be a
-/// full filename, filename without extension, or a directory. If ArgValue
-/// does not provide a filename, then use BaseName, and use the extension
-/// suitable for FileType.
-static const char *MakeCLOutputFilename(const ArgList &Args, StringRef ArgValue,
-                                        StringRef BaseName,
-                                        types::ID FileType) {
-  SmallString<128> Filename = ArgValue;
-
-  if (ArgValue.empty()) {
-    // If the argument is empty, output to BaseName in the current dir.
-    Filename = BaseName;
-  } else if (llvm::sys::path::is_separator(Filename.back())) {
-    // If the argument is a directory, output to BaseName in that dir.
-    llvm::sys::path::append(Filename, BaseName);
-  }
-
-  if (!llvm::sys::path::has_extension(ArgValue)) {
-    // If the argument didn't provide an extension, then set it.
-    const char *Extension = types::getTypeTempSuffix(FileType, true);
-
-    if (FileType == types::TY_Image &&
-        Args.hasArg(options::OPT__SLASH_LD, options::OPT__SLASH_LDd)) {
-      // The output file is a dll.
-      Extension = "dll";
-    }
-
-    llvm::sys::path::replace_extension(Filename, Extension);
-  }
-
-  return Args.MakeArgString(Filename.c_str());
-}
-
-const char *Driver::GetNamedOutputPath(Compilation &C, const JobAction &JA,
-                                       const char *BaseInput,
-                                       StringRef BoundArch, bool AtTopLevel,
-                                       bool MultipleArchs,
-                                       StringRef OffloadingPrefix) const {
-  llvm::PrettyStackTraceString CrashInfo("Computing output path");
-  // Output to a user requested destination?
-  if (AtTopLevel && !isa<DsymutilJobAction>(JA) && !isa<VerifyJobAction>(JA)) {
-    if (Arg *FinalOutput = C.getArgs().getLastArg(options::OPT_o))
-      return C.addResultFile(FinalOutput->getValue(), &JA);
-  }
-
-  // For /P, preprocess to file named after BaseInput.
-  if (C.getArgs().hasArg(options::OPT__SLASH_P)) {
-    assert(AtTopLevel && isa<PreprocessJobAction>(JA));
-    StringRef BaseName = llvm::sys::path::filename(BaseInput);
-    StringRef NameArg;
-    if (Arg *A = C.getArgs().getLastArg(options::OPT__SLASH_Fi))
-      NameArg = A->getValue();
-    return C.addResultFile(
-        MakeCLOutputFilename(C.getArgs(), NameArg, BaseName, types::TY_PP_C),
-        &JA);
-  }
-
-  // Default to writing to stdout?
-  if (AtTopLevel && !CCGenDiagnostics && isa<PreprocessJobAction>(JA))
-    return "-";
-
-  // Is this the assembly listing for /FA?
-  if (JA.getType() == types::TY_PP_Asm &&
-      (C.getArgs().hasArg(options::OPT__SLASH_FA) ||
-       C.getArgs().hasArg(options::OPT__SLASH_Fa))) {
-    // Use /Fa and the input filename to determine the asm file name.
-    StringRef BaseName = llvm::sys::path::filename(BaseInput);
-    StringRef FaValue = C.getArgs().getLastArgValue(options::OPT__SLASH_Fa);
-    return C.addResultFile(
-        MakeCLOutputFilename(C.getArgs(), FaValue, BaseName, JA.getType()),
-        &JA);
-  }
-
-  // Output to a temporary file?
-  if ((!AtTopLevel && !isSaveTempsEnabled() &&
-       !C.getArgs().hasArg(options::OPT__SLASH_Fo)) ||
-      CCGenDiagnostics) {
-    StringRef Name = llvm::sys::path::filename(BaseInput);
-    std::pair<StringRef, StringRef> Split = Name.split('.');
-    SmallString<128> TmpName;
-    const char *Suffix = types::getTypeTempSuffix(JA.getType(), IsCLMode());
-    Arg *A = C.getArgs().getLastArg(options::OPT_fcrash_diagnostics_dir);
-    if (CCGenDiagnostics && A) {
-      SmallString<128> CrashDirectory(A->getValue());
-      llvm::sys::path::append(CrashDirectory, Split.first);
-      const char *Middle = Suffix ? "-%%%%%%." : "-%%%%%%";
-      std::error_code EC =
-          llvm::sys::fs::createUniqueFile(CrashDirectory + Middle + Suffix, TmpName);
-      if (EC) {
-        Diag(clang::diag::err_unable_to_make_temp) << EC.message();
-        return "";
-      }
-    } else {
-      TmpName = GetTemporaryPath(Split.first, Suffix);
-    }
-    return C.addTempFile(C.getArgs().MakeArgString(TmpName));
-  }
-
-  SmallString<128> BasePath(BaseInput);
-  StringRef BaseName;
-
-  // Dsymutil actions should use the full path.
-  if (isa<DsymutilJobAction>(JA) || isa<VerifyJobAction>(JA))
-    BaseName = BasePath;
-  else
-    BaseName = llvm::sys::path::filename(BasePath);
-
-  // Determine what the derived output name should be.
-  const char *NamedOutput;
-
-  if ((JA.getType() == types::TY_Object || JA.getType() == types::TY_LTO_BC) &&
-      C.getArgs().hasArg(options::OPT__SLASH_Fo, options::OPT__SLASH_o)) {
-    // The /Fo or /o flag decides the object filename.
-    StringRef Val =
-        C.getArgs()
-            .getLastArg(options::OPT__SLASH_Fo, options::OPT__SLASH_o)
-            ->getValue();
-    NamedOutput =
-        MakeCLOutputFilename(C.getArgs(), Val, BaseName, types::TY_Object);
-  } else if (JA.getType() == types::TY_Image &&
-             C.getArgs().hasArg(options::OPT__SLASH_Fe,
-                                options::OPT__SLASH_o)) {
-    // The /Fe or /o flag names the linked file.
-    StringRef Val =
-        C.getArgs()
-            .getLastArg(options::OPT__SLASH_Fe, options::OPT__SLASH_o)
-            ->getValue();
-    NamedOutput =
-        MakeCLOutputFilename(C.getArgs(), Val, BaseName, types::TY_Image);
-  } else if (JA.getType() == types::TY_Image) {
-    if (IsCLMode()) {
-      // clang-cl uses BaseName for the executable name.
-      NamedOutput =
-          MakeCLOutputFilename(C.getArgs(), "", BaseName, types::TY_Image);
-    } else {
-      SmallString<128> Output(getDefaultImageName());
-      Output += OffloadingPrefix;
-      if (MultipleArchs && !BoundArch.empty()) {
-        Output += "-";
-        Output.append(BoundArch);
-      }
-      NamedOutput = C.getArgs().MakeArgString(Output.c_str());
-    }
-  } else if (JA.getType() == types::TY_PCH && IsCLMode()) {
-    NamedOutput = C.getArgs().MakeArgString(GetClPchPath(C, BaseName));
-  } else {
-    const char *Suffix = types::getTypeTempSuffix(JA.getType(), IsCLMode());
-    assert(Suffix && "All types used for output should have a suffix.");
-
-    std::string::size_type End = std::string::npos;
-    if (!types::appendSuffixForType(JA.getType()))
-      End = BaseName.rfind('.');
-    SmallString<128> Suffixed(BaseName.substr(0, End));
-    Suffixed += OffloadingPrefix;
-    if (MultipleArchs && !BoundArch.empty()) {
-      Suffixed += "-";
-      Suffixed.append(BoundArch);
-    }
-    // When using both -save-temps and -emit-llvm, use a ".tmp.bc" suffix for
-    // the unoptimized bitcode so that it does not get overwritten by the ".bc"
-    // optimized bitcode output.
-    if (!AtTopLevel && C.getArgs().hasArg(options::OPT_emit_llvm) &&
-        JA.getType() == types::TY_LLVM_BC)
-      Suffixed += ".tmp";
-    Suffixed += '.';
-    Suffixed += Suffix;
-    NamedOutput = C.getArgs().MakeArgString(Suffixed.c_str());
-  }
-
-  // Prepend object file path if -save-temps=obj
-  if (!AtTopLevel && isSaveTempsObj() && C.getArgs().hasArg(options::OPT_o) &&
-      JA.getType() != types::TY_PCH) {
-    Arg *FinalOutput = C.getArgs().getLastArg(options::OPT_o);
-    SmallString<128> TempPath(FinalOutput->getValue());
-    llvm::sys::path::remove_filename(TempPath);
-    StringRef OutputFileName = llvm::sys::path::filename(NamedOutput);
-    llvm::sys::path::append(TempPath, OutputFileName);
-    NamedOutput = C.getArgs().MakeArgString(TempPath.c_str());
-  }
-
-  // If we're saving temps and the temp file conflicts with the input file,
-  // then avoid overwriting input file.
-  if (!AtTopLevel && isSaveTempsEnabled() && NamedOutput == BaseName) {
-    bool SameFile = false;
-    SmallString<256> Result;
-    llvm::sys::fs::current_path(Result);
-    llvm::sys::path::append(Result, BaseName);
-    llvm::sys::fs::equivalent(BaseInput, Result.c_str(), SameFile);
-    // Must share the same path to conflict.
-    if (SameFile) {
-      StringRef Name = llvm::sys::path::filename(BaseInput);
-      std::pair<StringRef, StringRef> Split = Name.split('.');
-      std::string TmpName = GetTemporaryPath(
-          Split.first, types::getTypeTempSuffix(JA.getType(), IsCLMode()));
-      return C.addTempFile(C.getArgs().MakeArgString(TmpName));
-    }
-  }
-
-  // As an annoying special case, PCH generation doesn't strip the pathname.
-  if (JA.getType() == types::TY_PCH && !IsCLMode()) {
-    llvm::sys::path::remove_filename(BasePath);
-    if (BasePath.empty())
-      BasePath = NamedOutput;
-    else
-      llvm::sys::path::append(BasePath, NamedOutput);
-    return C.addResultFile(C.getArgs().MakeArgString(BasePath.c_str()), &JA);
-  } else {
-    return C.addResultFile(NamedOutput, &JA);
-  }
-}
-
-std::string Driver::GetFilePath(StringRef Name, const ToolChain &TC) const {
-  // Search for Name in a list of paths.
-  auto SearchPaths = [&](const llvm::SmallVectorImpl<std::string> &P)
-      -> llvm::Optional<std::string> {
-    // Respect a limited subset of the '-Bprefix' functionality in GCC by
-    // attempting to use this prefix when looking for file paths.
-    for (const auto &Dir : P) {
-      if (Dir.empty())
-        continue;
-      SmallString<128> P(Dir[0] == '=' ? SysRoot + Dir.substr(1) : Dir);
-      llvm::sys::path::append(P, Name);
-      if (llvm::sys::fs::exists(Twine(P)))
-        return P.str().str();
-    }
-    return None;
-  };
-
-  if (auto P = SearchPaths(PrefixDirs))
-    return *P;
-
-  SmallString<128> R(ResourceDir);
-  llvm::sys::path::append(R, Name);
-  if (llvm::sys::fs::exists(Twine(R)))
-    return R.str();
-
-  SmallString<128> P(TC.getCompilerRTPath());
-  llvm::sys::path::append(P, Name);
-  if (llvm::sys::fs::exists(Twine(P)))
-    return P.str();
-
-  if (auto P = SearchPaths(TC.getLibraryPaths()))
-    return *P;
-
-  if (auto P = SearchPaths(TC.getFilePaths()))
-    return *P;
-
-  return Name;
-}
-
-void Driver::generatePrefixedToolNames(
-    StringRef Tool, const ToolChain &TC,
-    SmallVectorImpl<std::string> &Names) const {
-  // FIXME: Needs a better variable than TargetTriple
-  Names.emplace_back((TargetTriple + "-" + Tool).str());
-  Names.emplace_back(Tool);
-
-  // Allow the discovery of tools prefixed with LLVM's default target triple.
-  std::string DefaultTargetTriple = llvm::sys::getDefaultTargetTriple();
-  if (DefaultTargetTriple != TargetTriple)
-    Names.emplace_back((DefaultTargetTriple + "-" + Tool).str());
-}
-
-static bool ScanDirForExecutable(SmallString<128> &Dir,
-                                 ArrayRef<std::string> Names) {
-  for (const auto &Name : Names) {
-    llvm::sys::path::append(Dir, Name);
-    if (llvm::sys::fs::can_execute(Twine(Dir)))
-      return true;
-    llvm::sys::path::remove_filename(Dir);
-  }
-  return false;
-}
-
-std::string Driver::GetProgramPath(StringRef Name, const ToolChain &TC) const {
-  SmallVector<std::string, 2> TargetSpecificExecutables;
-  generatePrefixedToolNames(Name, TC, TargetSpecificExecutables);
-
-  // Respect a limited subset of the '-Bprefix' functionality in GCC by
-  // attempting to use this prefix when looking for program paths.
-  for (const auto &PrefixDir : PrefixDirs) {
-    if (llvm::sys::fs::is_directory(PrefixDir)) {
-      SmallString<128> P(PrefixDir);
-      if (ScanDirForExecutable(P, TargetSpecificExecutables))
-        return P.str();
-    } else {
-      SmallString<128> P((PrefixDir + Name).str());
-      if (llvm::sys::fs::can_execute(Twine(P)))
-        return P.str();
-    }
-  }
-
-  const ToolChain::path_list &List = TC.getProgramPaths();
-  for (const auto &Path : List) {
-    SmallString<128> P(Path);
-    if (ScanDirForExecutable(P, TargetSpecificExecutables))
-      return P.str();
-  }
-
-  // If all else failed, search the path.
-  for (const auto &TargetSpecificExecutable : TargetSpecificExecutables)
-    if (llvm::ErrorOr<std::string> P =
-            llvm::sys::findProgramByName(TargetSpecificExecutable))
-      return *P;
-
-  return Name;
-}
-
-std::string Driver::GetTemporaryPath(StringRef Prefix, StringRef Suffix) const {
-  SmallString<128> Path;
-  std::error_code EC = llvm::sys::fs::createTemporaryFile(Prefix, Suffix, Path);
-  if (EC) {
-    Diag(clang::diag::err_unable_to_make_temp) << EC.message();
-    return "";
-  }
-
-  return Path.str();
-}
-
-std::string Driver::GetTemporaryDirectory(StringRef Prefix) const {
-  SmallString<128> Path;
-  std::error_code EC = llvm::sys::fs::createUniqueDirectory(Prefix, Path);
-  if (EC) {
-    Diag(clang::diag::err_unable_to_make_temp) << EC.message();
-    return "";
-  }
-
-  return Path.str();
-}
-
-std::string Driver::GetClPchPath(Compilation &C, StringRef BaseName) const {
-  SmallString<128> Output;
-  if (Arg *FpArg = C.getArgs().getLastArg(options::OPT__SLASH_Fp)) {
-    // FIXME: If anybody needs it, implement this obscure rule:
-    // "If you specify a directory without a file name, the default file name
-    // is VCx0.pch., where x is the major version of Visual C++ in use."
-    Output = FpArg->getValue();
-
-    // "If you do not specify an extension as part of the path name, an
-    // extension of .pch is assumed. "
-    if (!llvm::sys::path::has_extension(Output))
-      Output += ".pch";
-  } else {
-    if (Arg *YcArg = C.getArgs().getLastArg(options::OPT__SLASH_Yc))
-      Output = YcArg->getValue();
-    if (Output.empty())
-      Output = BaseName;
-    llvm::sys::path::replace_extension(Output, ".pch");
-  }
-  return Output.str();
-}
-
-const ToolChain &Driver::getToolChain(const ArgList &Args,
-                                      const llvm::Triple &Target) const {
-
-  auto &TC = ToolChains[Target.str()];
-  if (!TC) {
-    switch (Target.getOS()) {
-    case llvm::Triple::Haiku:
-      TC = llvm::make_unique<toolchains::Haiku>(*this, Target, Args);
-      break;
-    case llvm::Triple::Ananas:
-      TC = llvm::make_unique<toolchains::Ananas>(*this, Target, Args);
-      break;
-    case llvm::Triple::CloudABI:
-      TC = llvm::make_unique<toolchains::CloudABI>(*this, Target, Args);
-      break;
-    case llvm::Triple::Darwin:
-    case llvm::Triple::MacOSX:
-    case llvm::Triple::IOS:
-    case llvm::Triple::TvOS:
-    case llvm::Triple::WatchOS:
-      TC = llvm::make_unique<toolchains::DarwinClang>(*this, Target, Args);
-      break;
-    case llvm::Triple::DragonFly:
-      TC = llvm::make_unique<toolchains::DragonFly>(*this, Target, Args);
-      break;
-    case llvm::Triple::OpenBSD:
-      TC = llvm::make_unique<toolchains::OpenBSD>(*this, Target, Args);
-      break;
-    case llvm::Triple::NetBSD:
-      TC = llvm::make_unique<toolchains::NetBSD>(*this, Target, Args);
-      break;
-    case llvm::Triple::FreeBSD:
-      TC = llvm::make_unique<toolchains::FreeBSD>(*this, Target, Args);
-      break;
-    case llvm::Triple::Minix:
-      TC = llvm::make_unique<toolchains::Minix>(*this, Target, Args);
-      break;
-    case llvm::Triple::Linux:
-    case llvm::Triple::ELFIAMCU:
-      if (Target.getArch() == llvm::Triple::hexagon)
-        TC = llvm::make_unique<toolchains::HexagonToolChain>(*this, Target,
-                                                             Args);
-      else if ((Target.getVendor() == llvm::Triple::MipsTechnologies) &&
-               !Target.hasEnvironment())
-        TC = llvm::make_unique<toolchains::MipsLLVMToolChain>(*this, Target,
-                                                              Args);
-      else
-        TC = llvm::make_unique<toolchains::Linux>(*this, Target, Args);
-      break;
-    case llvm::Triple::NaCl:
-      TC = llvm::make_unique<toolchains::NaClToolChain>(*this, Target, Args);
-      break;
-    case llvm::Triple::Fuchsia:
-      TC = llvm::make_unique<toolchains::Fuchsia>(*this, Target, Args);
-      break;
-    case llvm::Triple::Solaris:
-      TC = llvm::make_unique<toolchains::Solaris>(*this, Target, Args);
-      break;
-    case llvm::Triple::AMDHSA:
-      TC = llvm::make_unique<toolchains::AMDGPUToolChain>(*this, Target, Args);
-      break;
-    case llvm::Triple::Win32:
-      switch (Target.getEnvironment()) {
-      default:
-        if (Target.isOSBinFormatELF())
-          TC = llvm::make_unique<toolchains::Generic_ELF>(*this, Target, Args);
-        else if (Target.isOSBinFormatMachO())
-          TC = llvm::make_unique<toolchains::MachO>(*this, Target, Args);
-        else
-          TC = llvm::make_unique<toolchains::Generic_GCC>(*this, Target, Args);
-        break;
-      case llvm::Triple::GNU:
-        TC = llvm::make_unique<toolchains::MinGW>(*this, Target, Args);
-        break;
-      case llvm::Triple::Itanium:
-        TC = llvm::make_unique<toolchains::CrossWindowsToolChain>(*this, Target,
-                                                                  Args);
-        break;
-      case llvm::Triple::MSVC:
-      case llvm::Triple::UnknownEnvironment:
-        if (Args.getLastArgValue(options::OPT_fuse_ld_EQ)
-                .startswith_lower("bfd"))
-          TC = llvm::make_unique<toolchains::CrossWindowsToolChain>(
-              *this, Target, Args);
-        else
-          TC =
-              llvm::make_unique<toolchains::MSVCToolChain>(*this, Target, Args);
-        break;
-      }
-      break;
-    case llvm::Triple::PS4:
-      TC = llvm::make_unique<toolchains::PS4CPU>(*this, Target, Args);
-      break;
-    case llvm::Triple::Contiki:
-      TC = llvm::make_unique<toolchains::Contiki>(*this, Target, Args);
-      break;
-    case llvm::Triple::Hurd:
-      TC = llvm::make_unique<toolchains::Hurd>(*this, Target, Args);
-      break;
-    default:
-      // Of these targets, Hexagon is the only one that might have
-      // an OS of Linux, in which case it got handled above already.
-      switch (Target.getArch()) {
-      case llvm::Triple::tce:
-        TC = llvm::make_unique<toolchains::TCEToolChain>(*this, Target, Args);
-        break;
-      case llvm::Triple::tcele:
-        TC = llvm::make_unique<toolchains::TCELEToolChain>(*this, Target, Args);
-        break;
-      case llvm::Triple::hexagon:
-        TC = llvm::make_unique<toolchains::HexagonToolChain>(*this, Target,
-                                                             Args);
-        break;
-      case llvm::Triple::lanai:
-        TC = llvm::make_unique<toolchains::LanaiToolChain>(*this, Target, Args);
-        break;
-      case llvm::Triple::xcore:
-        TC = llvm::make_unique<toolchains::XCoreToolChain>(*this, Target, Args);
-        break;
-      case llvm::Triple::wasm32:
-      case llvm::Triple::wasm64:
-        TC = llvm::make_unique<toolchains::WebAssembly>(*this, Target, Args);
-        break;
-      case llvm::Triple::avr:
-        TC = llvm::make_unique<toolchains::AVRToolChain>(*this, Target, Args);
-        break;
-      case llvm::Triple::msp430:
-        TC =
-            llvm::make_unique<toolchains::MSP430ToolChain>(*this, Target, Args);
-        break;
-      case llvm::Triple::riscv32:
-      case llvm::Triple::riscv64:
-        TC = llvm::make_unique<toolchains::RISCVToolChain>(*this, Target, Args);
-        break;
-      default:
-        if (Target.getVendor() == llvm::Triple::Myriad)
-          TC = llvm::make_unique<toolchains::MyriadToolChain>(*this, Target,
-                                                              Args);
-        else if (toolchains::BareMetal::handlesTarget(Target))
-          TC = llvm::make_unique<toolchains::BareMetal>(*this, Target, Args);
-        else if (Target.isOSBinFormatELF())
-          TC = llvm::make_unique<toolchains::Generic_ELF>(*this, Target, Args);
-        else if (Target.isOSBinFormatMachO())
-          TC = llvm::make_unique<toolchains::MachO>(*this, Target, Args);
-        else
-          TC = llvm::make_unique<toolchains::Generic_GCC>(*this, Target, Args);
-      }
-    }
-  }
-
-  // Intentionally omitted from the switch above: llvm::Triple::CUDA.  CUDA
-  // compiles always need two toolchains, the CUDA toolchain and the host
-  // toolchain.  So the only valid way to create a CUDA toolchain is via
-  // CreateOffloadingDeviceToolChains.
-
-  return *TC;
-}
-
-bool Driver::ShouldUseClangCompiler(const JobAction &JA) const {
-  // Say "no" if there is not exactly one input of a type clang understands.
-  if (JA.size() != 1 ||
-      !types::isAcceptedByClang((*JA.input_begin())->getType()))
-    return false;
-
-  // And say "no" if this is not a kind of action clang understands.
-  if (!isa<PreprocessJobAction>(JA) && !isa<PrecompileJobAction>(JA) &&
-      !isa<CompileJobAction>(JA) && !isa<BackendJobAction>(JA))
-    return false;
-
-  return true;
-}
-
-/// GetReleaseVersion - Parse (([0-9]+)(.([0-9]+)(.([0-9]+)?))?)? and return the
-/// grouped values as integers. Numbers which are not provided are set to 0.
-///
-/// \return True if the entire string was parsed (9.2), or all groups were
-/// parsed (10.3.5extrastuff).
-bool Driver::GetReleaseVersion(StringRef Str, unsigned &Major, unsigned &Minor,
-                               unsigned &Micro, bool &HadExtra) {
-  HadExtra = false;
-
-  Major = Minor = Micro = 0;
-  if (Str.empty())
-    return false;
-
-  if (Str.consumeInteger(10, Major))
-    return false;
-  if (Str.empty())
-    return true;
-  if (Str[0] != '.')
-    return false;
-
-  Str = Str.drop_front(1);
-
-  if (Str.consumeInteger(10, Minor))
-    return false;
-  if (Str.empty())
-    return true;
-  if (Str[0] != '.')
-    return false;
-  Str = Str.drop_front(1);
-
-  if (Str.consumeInteger(10, Micro))
-    return false;
-  if (!Str.empty())
-    HadExtra = true;
-  return true;
-}
-
-/// Parse digits from a string \p Str and fulfill \p Digits with
-/// the parsed numbers. This method assumes that the max number of
-/// digits to look for is equal to Digits.size().
-///
-/// \return True if the entire string was parsed and there are
-/// no extra characters remaining at the end.
-bool Driver::GetReleaseVersion(StringRef Str,
-                               MutableArrayRef<unsigned> Digits) {
-  if (Str.empty())
-    return false;
-
-  unsigned CurDigit = 0;
-  while (CurDigit < Digits.size()) {
-    unsigned Digit;
-    if (Str.consumeInteger(10, Digit))
-      return false;
-    Digits[CurDigit] = Digit;
-    if (Str.empty())
-      return true;
-    if (Str[0] != '.')
-      return false;
-    Str = Str.drop_front(1);
-    CurDigit++;
-  }
-
-  // More digits than requested, bail out...
-  return false;
-}
-
-std::pair<unsigned, unsigned> Driver::getIncludeExcludeOptionFlagMasks(bool IsClCompatMode) const {
-  unsigned IncludedFlagsBitmask = 0;
-  unsigned ExcludedFlagsBitmask = options::NoDriverOption;
-
-  if (IsClCompatMode) {
-    // Include CL and Core options.
-    IncludedFlagsBitmask |= options::CLOption;
-    IncludedFlagsBitmask |= options::CoreOption;
-  } else {
-    ExcludedFlagsBitmask |= options::CLOption;
-  }
-
-  return std::make_pair(IncludedFlagsBitmask, ExcludedFlagsBitmask);
-}
-
-bool clang::driver::isOptimizationLevelFast(const ArgList &Args) {
-  return Args.hasFlag(options::OPT_Ofast, options::OPT_O_Group, false);
-}