Export clang-format16 via ydblib project

6e6be3a95868fde888d801b7590af4044049563f

1 files changed, 805 insertions, 0 deletions

diff --git a/contrib/libs/clang16/include/clang/Driver/Driver.h b/contrib/libs/clang16/include/clang/Driver/Driver.h
new file mode 100644
index 0000000000..bef131dfd6
--- /dev/null
+++ b/contrib/libs/clang16/include/clang/Driver/Driver.h
@@ -0,0 +1,805 @@
+#pragma once
+
+#ifdef __GNUC__
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wunused-parameter"
+#endif
+
+//===--- Driver.h - Clang GCC Compatible Driver -----------------*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_CLANG_DRIVER_DRIVER_H
+#define LLVM_CLANG_DRIVER_DRIVER_H
+
+#include "clang/Basic/Diagnostic.h"
+#include "clang/Basic/HeaderInclude.h"
+#include "clang/Basic/LLVM.h"
+#include "clang/Driver/Action.h"
+#include "clang/Driver/DriverDiagnostic.h"
+#include "clang/Driver/InputInfo.h"
+#include "clang/Driver/Options.h"
+#include "clang/Driver/Phases.h"
+#include "clang/Driver/ToolChain.h"
+#include "clang/Driver/Types.h"
+#include "clang/Driver/Util.h"
+#include "llvm/ADT/ArrayRef.h"
+#include "llvm/ADT/StringMap.h"
+#include "llvm/ADT/StringRef.h"
+#include "llvm/Option/Arg.h"
+#include "llvm/Option/ArgList.h"
+#include "llvm/Support/StringSaver.h"
+
+#include <list>
+#include <map>
+#include <string>
+#include <vector>
+
+namespace llvm {
+class Triple;
+namespace vfs {
+class FileSystem;
+}
+namespace cl {
+class ExpansionContext;
+}
+} // namespace llvm
+
+namespace clang {
+
+namespace driver {
+
+typedef SmallVector<InputInfo, 4> InputInfoList;
+
+class Command;
+class Compilation;
+class JobAction;
+class ToolChain;
+
+/// Describes the kind of LTO mode selected via -f(no-)?lto(=.*)? options.
+enum LTOKind {
+  LTOK_None,
+  LTOK_Full,
+  LTOK_Thin,
+  LTOK_Unknown
+};
+
+/// Whether headers used to construct C++20 module units should be looked
+/// up by the path supplied on the command line, or in the user or system
+/// search paths.
+enum ModuleHeaderMode {
+  HeaderMode_None,
+  HeaderMode_Default,
+  HeaderMode_User,
+  HeaderMode_System
+};
+
+/// Driver - Encapsulate logic for constructing compilation processes
+/// from a set of gcc-driver-like command line arguments.
+class Driver {
+  DiagnosticsEngine &Diags;
+
+  IntrusiveRefCntPtr<llvm::vfs::FileSystem> VFS;
+
+  enum DriverMode {
+    GCCMode,
+    GXXMode,
+    CPPMode,
+    CLMode,
+    FlangMode,
+    DXCMode
+  } Mode;
+
+  enum SaveTempsMode {
+    SaveTempsNone,
+    SaveTempsCwd,
+    SaveTempsObj
+  } SaveTemps;
+
+  enum BitcodeEmbedMode {
+    EmbedNone,
+    EmbedMarker,
+    EmbedBitcode
+  } BitcodeEmbed;
+
+  enum OffloadMode {
+    OffloadHostDevice,
+    OffloadHost,
+    OffloadDevice,
+  } Offload;
+
+  /// Header unit mode set by -fmodule-header={user,system}.
+  ModuleHeaderMode CXX20HeaderType;
+
+  /// Set if we should process inputs and jobs with C++20 module
+  /// interpretation.
+  bool ModulesModeCXX20;
+
+  /// LTO mode selected via -f(no-)?lto(=.*)? options.
+  LTOKind LTOMode;
+
+  /// LTO mode selected via -f(no-offload-)?lto(=.*)? options.
+  LTOKind OffloadLTOMode;
+
+public:
+  enum OpenMPRuntimeKind {
+    /// An unknown OpenMP runtime. We can't generate effective OpenMP code
+    /// without knowing what runtime to target.
+    OMPRT_Unknown,
+
+    /// The LLVM OpenMP runtime. When completed and integrated, this will become
+    /// the default for Clang.
+    OMPRT_OMP,
+
+    /// The GNU OpenMP runtime. Clang doesn't support generating OpenMP code for
+    /// this runtime but can swallow the pragmas, and find and link against the
+    /// runtime library itself.
+    OMPRT_GOMP,
+
+    /// The legacy name for the LLVM OpenMP runtime from when it was the Intel
+    /// OpenMP runtime. We support this mode for users with existing
+    /// dependencies on this runtime library name.
+    OMPRT_IOMP5
+  };
+
+  // Diag - Forwarding function for diagnostics.
+  DiagnosticBuilder Diag(unsigned DiagID) const {
+    return Diags.Report(DiagID);
+  }
+
+  // FIXME: Privatize once interface is stable.
+public:
+  /// The name the driver was invoked as.
+  std::string Name;
+
+  /// The path the driver executable was in, as invoked from the
+  /// command line.
+  std::string Dir;
+
+  /// The original path to the clang executable.
+  std::string ClangExecutable;
+
+  /// Target and driver mode components extracted from clang executable name.
+  ParsedClangName ClangNameParts;
+
+  /// The path to the installed clang directory, if any.
+  std::string InstalledDir;
+
+  /// The path to the compiler resource directory.
+  std::string ResourceDir;
+
+  /// System directory for config files.
+  std::string SystemConfigDir;
+
+  /// User directory for config files.
+  std::string UserConfigDir;
+
+  /// A prefix directory used to emulate a limited subset of GCC's '-Bprefix'
+  /// functionality.
+  /// FIXME: This type of customization should be removed in favor of the
+  /// universal driver when it is ready.
+  typedef SmallVector<std::string, 4> prefix_list;
+  prefix_list PrefixDirs;
+
+  /// sysroot, if present
+  std::string SysRoot;
+
+  /// Dynamic loader prefix, if present
+  std::string DyldPrefix;
+
+  /// Driver title to use with help.
+  std::string DriverTitle;
+
+  /// Information about the host which can be overridden by the user.
+  std::string HostBits, HostMachine, HostSystem, HostRelease;
+
+  /// The file to log CC_PRINT_PROC_STAT_FILE output to, if enabled.
+  std::string CCPrintStatReportFilename;
+
+  /// The file to log CC_PRINT_OPTIONS output to, if enabled.
+  std::string CCPrintOptionsFilename;
+
+  /// The file to log CC_PRINT_HEADERS output to, if enabled.
+  std::string CCPrintHeadersFilename;
+
+  /// The file to log CC_LOG_DIAGNOSTICS output to, if enabled.
+  std::string CCLogDiagnosticsFilename;
+
+  /// An input type and its arguments.
+  using InputTy = std::pair<types::ID, const llvm::opt::Arg *>;
+
+  /// A list of inputs and their types for the given arguments.
+  using InputList = SmallVector<InputTy, 16>;
+
+  /// Whether the driver should follow g++ like behavior.
+  bool CCCIsCXX() const { return Mode == GXXMode; }
+
+  /// Whether the driver is just the preprocessor.
+  bool CCCIsCPP() const { return Mode == CPPMode; }
+
+  /// Whether the driver should follow gcc like behavior.
+  bool CCCIsCC() const { return Mode == GCCMode; }
+
+  /// Whether the driver should follow cl.exe like behavior.
+  bool IsCLMode() const { return Mode == CLMode; }
+
+  /// Whether the driver should invoke flang for fortran inputs.
+  /// Other modes fall back to calling gcc which in turn calls gfortran.
+  bool IsFlangMode() const { return Mode == FlangMode; }
+
+  /// Whether the driver should follow dxc.exe like behavior.
+  bool IsDXCMode() const { return Mode == DXCMode; }
+
+  /// Only print tool bindings, don't build any jobs.
+  unsigned CCCPrintBindings : 1;
+
+  /// Set CC_PRINT_OPTIONS mode, which is like -v but logs the commands to
+  /// CCPrintOptionsFilename or to stderr.
+  unsigned CCPrintOptions : 1;
+
+  /// The format of the header information that is emitted. If CC_PRINT_HEADERS
+  /// is set, the format is textual. Otherwise, the format is determined by the
+  /// enviroment variable CC_PRINT_HEADERS_FORMAT.
+  HeaderIncludeFormatKind CCPrintHeadersFormat = HIFMT_None;
+
+  /// This flag determines whether clang should filter the header information
+  /// that is emitted. If enviroment variable CC_PRINT_HEADERS_FILTERING is set
+  /// to "only-direct-system", only system headers that are directly included
+  /// from non-system headers are emitted.
+  HeaderIncludeFilteringKind CCPrintHeadersFiltering = HIFIL_None;
+
+  /// Set CC_LOG_DIAGNOSTICS mode, which causes the frontend to log diagnostics
+  /// to CCLogDiagnosticsFilename or to stderr, in a stable machine readable
+  /// format.
+  unsigned CCLogDiagnostics : 1;
+
+  /// Whether the driver is generating diagnostics for debugging purposes.
+  unsigned CCGenDiagnostics : 1;
+
+  /// Set CC_PRINT_PROC_STAT mode, which causes the driver to dump
+  /// performance report to CC_PRINT_PROC_STAT_FILE or to stdout.
+  unsigned CCPrintProcessStats : 1;
+
+  /// Pointer to the ExecuteCC1Tool function, if available.
+  /// When the clangDriver lib is used through clang.exe, this provides a
+  /// shortcut for executing the -cc1 command-line directly, in the same
+  /// process.
+  typedef int (*CC1ToolFunc)(SmallVectorImpl<const char *> &ArgV);
+  CC1ToolFunc CC1Main = nullptr;
+
+private:
+  /// Raw target triple.
+  std::string TargetTriple;
+
+  /// Name to use when invoking gcc/g++.
+  std::string CCCGenericGCCName;
+
+  /// Paths to configuration files used.
+  std::vector<std::string> ConfigFiles;
+
+  /// Allocator for string saver.
+  llvm::BumpPtrAllocator Alloc;
+
+  /// Object that stores strings read from configuration file.
+  llvm::StringSaver Saver;
+
+  /// Arguments originated from configuration file.
+  std::unique_ptr<llvm::opt::InputArgList> CfgOptions;
+
+  /// Arguments originated from command line.
+  std::unique_ptr<llvm::opt::InputArgList> CLOptions;
+
+  /// Whether to check that input files exist when constructing compilation
+  /// jobs.
+  unsigned CheckInputsExist : 1;
+  /// Whether to probe for PCH files on disk, in order to upgrade
+  /// -include foo.h to -include-pch foo.h.pch.
+  unsigned ProbePrecompiled : 1;
+
+public:
+  // getFinalPhase - Determine which compilation mode we are in and record
+  // which option we used to determine the final phase.
+  // TODO: Much of what getFinalPhase returns are not actually true compiler
+  //       modes. Fold this functionality into Types::getCompilationPhases and
+  //       handleArguments.
+  phases::ID getFinalPhase(const llvm::opt::DerivedArgList &DAL,
+                           llvm::opt::Arg **FinalPhaseArg = nullptr) const;
+
+private:
+  /// Certain options suppress the 'no input files' warning.
+  unsigned SuppressMissingInputWarning : 1;
+
+  /// Cache of all the ToolChains in use by the driver.
+  ///
+  /// This maps from the string representation of a triple to a ToolChain
+  /// created targeting that triple. The driver owns all the ToolChain objects
+  /// stored in it, and will clean them up when torn down.
+  mutable llvm::StringMap<std::unique_ptr<ToolChain>> ToolChains;
+
+  /// Cache of known offloading architectures for the ToolChain already derived.
+  /// This should only be modified when we first initialize the offloading
+  /// toolchains.
+  llvm::DenseMap<const ToolChain *, llvm::DenseSet<llvm::StringRef>> KnownArchs;
+
+private:
+  /// TranslateInputArgs - Create a new derived argument list from the input
+  /// arguments, after applying the standard argument translations.
+  llvm::opt::DerivedArgList *
+  TranslateInputArgs(const llvm::opt::InputArgList &Args) const;
+
+  // handleArguments - All code related to claiming and printing diagnostics
+  // related to arguments to the driver are done here.
+  void handleArguments(Compilation &C, llvm::opt::DerivedArgList &Args,
+                       const InputList &Inputs, ActionList &Actions) const;
+
+  // Before executing jobs, sets up response files for commands that need them.
+  void setUpResponseFiles(Compilation &C, Command &Cmd);
+
+  void generatePrefixedToolNames(StringRef Tool, const ToolChain &TC,
+                                 SmallVectorImpl<std::string> &Names) const;
+
+  /// Find the appropriate .crash diagonostic file for the child crash
+  /// under this driver and copy it out to a temporary destination with the
+  /// other reproducer related files (.sh, .cache, etc). If not found, suggest a
+  /// directory for the user to look at.
+  ///
+  /// \param ReproCrashFilename The file path to copy the .crash to.
+  /// \param CrashDiagDir       The suggested directory for the user to look at
+  ///                           in case the search or copy fails.
+  ///
+  /// \returns If the .crash is found and successfully copied return true,
+  /// otherwise false and return the suggested directory in \p CrashDiagDir.
+  bool getCrashDiagnosticFile(StringRef ReproCrashFilename,
+                              SmallString<128> &CrashDiagDir);
+
+public:
+
+  /// Takes the path to a binary that's either in bin/ or lib/ and returns
+  /// the path to clang's resource directory.
+  static std::string GetResourcesPath(StringRef BinaryPath,
+                                      StringRef CustomResourceDir = "");
+
+  Driver(StringRef ClangExecutable, StringRef TargetTriple,
+         DiagnosticsEngine &Diags, std::string Title = "clang LLVM compiler",
+         IntrusiveRefCntPtr<llvm::vfs::FileSystem> VFS = nullptr);
+
+  /// @name Accessors
+  /// @{
+
+  /// Name to use when invoking gcc/g++.
+  const std::string &getCCCGenericGCCName() const { return CCCGenericGCCName; }
+
+  llvm::ArrayRef<std::string> getConfigFiles() const {
+    return ConfigFiles;
+  }
+
+  const llvm::opt::OptTable &getOpts() const { return getDriverOptTable(); }
+
+  DiagnosticsEngine &getDiags() const { return Diags; }
+
+  llvm::vfs::FileSystem &getVFS() const { return *VFS; }
+
+  bool getCheckInputsExist() const { return CheckInputsExist; }
+
+  void setCheckInputsExist(bool Value) { CheckInputsExist = Value; }
+
+  bool getProbePrecompiled() const { return ProbePrecompiled; }
+  void setProbePrecompiled(bool Value) { ProbePrecompiled = Value; }
+
+  void setTargetAndMode(const ParsedClangName &TM) { ClangNameParts = TM; }
+
+  const std::string &getTitle() { return DriverTitle; }
+  void setTitle(std::string Value) { DriverTitle = std::move(Value); }
+
+  std::string getTargetTriple() const { return TargetTriple; }
+
+  /// Get the path to the main clang executable.
+  const char *getClangProgramPath() const {
+    return ClangExecutable.c_str();
+  }
+
+  /// Get the path to where the clang executable was installed.
+  const char *getInstalledDir() const {
+    if (!InstalledDir.empty())
+      return InstalledDir.c_str();
+    return Dir.c_str();
+  }
+  void setInstalledDir(StringRef Value) { InstalledDir = std::string(Value); }
+
+  bool isSaveTempsEnabled() const { return SaveTemps != SaveTempsNone; }
+  bool isSaveTempsObj() const { return SaveTemps == SaveTempsObj; }
+
+  bool embedBitcodeEnabled() const { return BitcodeEmbed != EmbedNone; }
+  bool embedBitcodeInObject() const { return (BitcodeEmbed == EmbedBitcode); }
+  bool embedBitcodeMarkerOnly() const { return (BitcodeEmbed == EmbedMarker); }
+
+  bool offloadHostOnly() const { return Offload == OffloadHost; }
+  bool offloadDeviceOnly() const { return Offload == OffloadDevice; }
+
+  /// Compute the desired OpenMP runtime from the flags provided.
+  OpenMPRuntimeKind getOpenMPRuntime(const llvm::opt::ArgList &Args) const;
+
+  /// @}
+  /// @name Primary Functionality
+  /// @{
+
+  /// CreateOffloadingDeviceToolChains - create all the toolchains required to
+  /// support offloading devices given the programming models specified in the
+  /// current compilation. Also, update the host tool chain kind accordingly.
+  void CreateOffloadingDeviceToolChains(Compilation &C, InputList &Inputs);
+
+  /// BuildCompilation - Construct a compilation object for a command
+  /// line argument vector.
+  ///
+  /// \return A compilation, or 0 if none was built for the given
+  /// argument vector. A null return value does not necessarily
+  /// indicate an error condition, the diagnostics should be queried
+  /// to determine if an error occurred.
+  Compilation *BuildCompilation(ArrayRef<const char *> Args);
+
+  /// ParseArgStrings - Parse the given list of strings into an
+  /// ArgList.
+  llvm::opt::InputArgList ParseArgStrings(ArrayRef<const char *> Args,
+                                          bool IsClCompatMode,
+                                          bool &ContainsError);
+
+  /// BuildInputs - Construct the list of inputs and their types from
+  /// the given arguments.
+  ///
+  /// \param TC - The default host tool chain.
+  /// \param Args - The input arguments.
+  /// \param Inputs - The list to store the resulting compilation
+  /// inputs onto.
+  void BuildInputs(const ToolChain &TC, llvm::opt::DerivedArgList &Args,
+                   InputList &Inputs) const;
+
+  /// BuildActions - Construct the list of actions to perform for the
+  /// given arguments, which are only done for a single architecture.
+  ///
+  /// \param C - The compilation that is being built.
+  /// \param Args - The input arguments.
+  /// \param Actions - The list to store the resulting actions onto.
+  void BuildActions(Compilation &C, llvm::opt::DerivedArgList &Args,
+                    const InputList &Inputs, ActionList &Actions) const;
+
+  /// BuildUniversalActions - Construct the list of actions to perform
+  /// for the given arguments, which may require a universal build.
+  ///
+  /// \param C - The compilation that is being built.
+  /// \param TC - The default host tool chain.
+  void BuildUniversalActions(Compilation &C, const ToolChain &TC,
+                             const InputList &BAInputs) const;
+
+  /// BuildOffloadingActions - Construct the list of actions to perform for the
+  /// offloading toolchain that will be embedded in the host.
+  ///
+  /// \param C - The compilation that is being built.
+  /// \param Args - The input arguments.
+  /// \param Input - The input type and arguments
+  /// \param HostAction - The host action used in the offloading toolchain.
+  Action *BuildOffloadingActions(Compilation &C,
+                                 llvm::opt::DerivedArgList &Args,
+                                 const InputTy &Input,
+                                 Action *HostAction) const;
+
+  /// Returns the set of bound architectures active for this offload kind.
+  /// If there are no bound architctures we return a set containing only the
+  /// empty string. The \p SuppressError option is used to suppress errors.
+  llvm::DenseSet<StringRef>
+  getOffloadArchs(Compilation &C, const llvm::opt::DerivedArgList &Args,
+                  Action::OffloadKind Kind, const ToolChain *TC,
+                  bool SuppressError = false) const;
+
+  /// Check that the file referenced by Value exists. If it doesn't,
+  /// issue a diagnostic and return false.
+  /// If TypoCorrect is true and the file does not exist, see if it looks
+  /// like a likely typo for a flag and if so print a "did you mean" blurb.
+  bool DiagnoseInputExistence(const llvm::opt::DerivedArgList &Args,
+                              StringRef Value, types::ID Ty,
+                              bool TypoCorrect) const;
+
+  /// BuildJobs - Bind actions to concrete tools and translate
+  /// arguments to form the list of jobs to run.
+  ///
+  /// \param C - The compilation that is being built.
+  void BuildJobs(Compilation &C) const;
+
+  /// ExecuteCompilation - Execute the compilation according to the command line
+  /// arguments and return an appropriate exit code.
+  ///
+  /// This routine handles additional processing that must be done in addition
+  /// to just running the subprocesses, for example reporting errors, setting
+  /// up response files, removing temporary files, etc.
+  int ExecuteCompilation(Compilation &C,
+     SmallVectorImpl< std::pair<int, const Command *> > &FailingCommands);
+
+  /// Contains the files in the compilation diagnostic report generated by
+  /// generateCompilationDiagnostics.
+  struct CompilationDiagnosticReport {
+    llvm::SmallVector<std::string, 4> TemporaryFiles;
+  };
+
+  /// generateCompilationDiagnostics - Generate diagnostics information
+  /// including preprocessed source file(s).
+  ///
+  void generateCompilationDiagnostics(
+      Compilation &C, const Command &FailingCommand,
+      StringRef AdditionalInformation = "",
+      CompilationDiagnosticReport *GeneratedReport = nullptr);
+
+  enum class CommandStatus {
+    Crash = 1,
+    Error,
+    Ok,
+  };
+
+  enum class ReproLevel {
+    Off = 0,
+    OnCrash = static_cast<int>(CommandStatus::Crash),
+    OnError = static_cast<int>(CommandStatus::Error),
+    Always = static_cast<int>(CommandStatus::Ok),
+  };
+
+  bool maybeGenerateCompilationDiagnostics(
+      CommandStatus CS, ReproLevel Level, Compilation &C,
+      const Command &FailingCommand, StringRef AdditionalInformation = "",
+      CompilationDiagnosticReport *GeneratedReport = nullptr) {
+    if (static_cast<int>(CS) > static_cast<int>(Level))
+      return false;
+    if (CS != CommandStatus::Crash)
+      Diags.Report(diag::err_drv_force_crash)
+          << !::getenv("FORCE_CLANG_DIAGNOSTICS_CRASH");
+    // Hack to ensure that diagnostic notes get emitted.
+    Diags.setLastDiagnosticIgnored(false);
+    generateCompilationDiagnostics(C, FailingCommand, AdditionalInformation,
+                                   GeneratedReport);
+    return true;
+  }
+
+  /// @}
+  /// @name Helper Methods
+  /// @{
+
+  /// PrintActions - Print the list of actions.
+  void PrintActions(const Compilation &C) const;
+
+  /// PrintHelp - Print the help text.
+  ///
+  /// \param ShowHidden - Show hidden options.
+  void PrintHelp(bool ShowHidden) const;
+
+  /// PrintVersion - Print the driver version.
+  void PrintVersion(const Compilation &C, raw_ostream &OS) const;
+
+  /// GetFilePath - Lookup \p Name in the list of file search paths.
+  ///
+  /// \param TC - The tool chain for additional information on
+  /// directories to search.
+  //
+  // FIXME: This should be in CompilationInfo.
+  std::string GetFilePath(StringRef Name, const ToolChain &TC) const;
+
+  /// GetProgramPath - Lookup \p Name in the list of program search paths.
+  ///
+  /// \param TC - The provided tool chain for additional information on
+  /// directories to search.
+  //
+  // FIXME: This should be in CompilationInfo.
+  std::string GetProgramPath(StringRef Name, const ToolChain &TC) const;
+
+  /// HandleAutocompletions - Handle --autocomplete by searching and printing
+  /// possible flags, descriptions, and its arguments.
+  void HandleAutocompletions(StringRef PassedFlags) const;
+
+  /// HandleImmediateArgs - Handle any arguments which should be
+  /// treated before building actions or binding tools.
+  ///
+  /// \return Whether any compilation should be built for this
+  /// invocation.
+  bool HandleImmediateArgs(const Compilation &C);
+
+  /// ConstructAction - Construct the appropriate action to do for
+  /// \p Phase on the \p Input, taking in to account arguments
+  /// like -fsyntax-only or --analyze.
+  Action *ConstructPhaseAction(
+      Compilation &C, const llvm::opt::ArgList &Args, phases::ID Phase,
+      Action *Input,
+      Action::OffloadKind TargetDeviceOffloadKind = Action::OFK_None) const;
+
+  /// BuildJobsForAction - Construct the jobs to perform for the action \p A and
+  /// return an InputInfo for the result of running \p A.  Will only construct
+  /// jobs for a given (Action, ToolChain, BoundArch, DeviceKind) tuple once.
+  InputInfoList 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>, InputInfoList>
+          &CachedResults,
+      Action::OffloadKind TargetDeviceOffloadKind) const;
+
+  /// Returns the default name for linked images (e.g., "a.out").
+  const char *getDefaultImageName() const;
+
+  // Creates a temp file with $Prefix-%%%%%%.$Suffix
+  const char *CreateTempFile(Compilation &C, StringRef Prefix, StringRef Suffix,
+                             bool MultipleArchs = false,
+                             StringRef BoundArch = {}) const;
+
+  /// GetNamedOutputPath - Return the name to use for the output of
+  /// the action \p JA. The result is appended to the compilation's
+  /// list of temporary or result files, as appropriate.
+  ///
+  /// \param C - The compilation.
+  /// \param JA - The action of interest.
+  /// \param BaseInput - The original input file that this action was
+  /// triggered by.
+  /// \param BoundArch - The bound architecture.
+  /// \param AtTopLevel - Whether this is a "top-level" action.
+  /// \param MultipleArchs - Whether multiple -arch options were supplied.
+  /// \param NormalizedTriple - The normalized triple of the relevant target.
+  const char *GetNamedOutputPath(Compilation &C, const JobAction &JA,
+                                 const char *BaseInput, StringRef BoundArch,
+                                 bool AtTopLevel, bool MultipleArchs,
+                                 StringRef NormalizedTriple) const;
+
+  /// GetTemporaryPath - Return the pathname of a temporary file to use
+  /// as part of compilation; the file will have the given prefix and suffix.
+  ///
+  /// GCC goes to extra lengths here to be a bit more robust.
+  std::string GetTemporaryPath(StringRef Prefix, StringRef Suffix) const;
+
+  /// GetTemporaryDirectory - Return the pathname of a temporary directory to
+  /// use as part of compilation; the directory will have the given prefix.
+  std::string GetTemporaryDirectory(StringRef Prefix) const;
+
+  /// Return the pathname of the pch file in clang-cl mode.
+  std::string GetClPchPath(Compilation &C, StringRef BaseName) const;
+
+  /// ShouldUseClangCompiler - Should the clang compiler be used to
+  /// handle this action.
+  bool ShouldUseClangCompiler(const JobAction &JA) const;
+
+  /// ShouldUseFlangCompiler - Should the flang compiler be used to
+  /// handle this action.
+  bool ShouldUseFlangCompiler(const JobAction &JA) const;
+
+  /// ShouldEmitStaticLibrary - Should the linker emit a static library.
+  bool ShouldEmitStaticLibrary(const llvm::opt::ArgList &Args) const;
+
+  /// Returns true if the user has indicated a C++20 header unit mode.
+  bool hasHeaderMode() const { return CXX20HeaderType != HeaderMode_None; }
+
+  /// Get the mode for handling headers as set by fmodule-header{=}.
+  ModuleHeaderMode getModuleHeaderMode() const { return CXX20HeaderType; }
+
+  /// Returns true if we are performing any kind of LTO.
+  bool isUsingLTO(bool IsOffload = false) const {
+    return getLTOMode(IsOffload) != LTOK_None;
+  }
+
+  /// Get the specific kind of LTO being performed.
+  LTOKind getLTOMode(bool IsOffload = false) const {
+    return IsOffload ? OffloadLTOMode : LTOMode;
+  }
+
+private:
+
+  /// Tries to load options from configuration files.
+  ///
+  /// \returns true if error occurred.
+  bool loadConfigFiles();
+
+  /// Tries to load options from default configuration files (deduced from
+  /// executable filename).
+  ///
+  /// \returns true if error occurred.
+  bool loadDefaultConfigFiles(llvm::cl::ExpansionContext &ExpCtx);
+
+  /// Read options from the specified file.
+  ///
+  /// \param [in] FileName File to read.
+  /// \param [in] Search and expansion options.
+  /// \returns true, if error occurred while reading.
+  bool readConfigFile(StringRef FileName, llvm::cl::ExpansionContext &ExpCtx);
+
+  /// Set the driver mode (cl, gcc, etc) from the value of the `--driver-mode`
+  /// option.
+  void setDriverMode(StringRef DriverModeValue);
+
+  /// Parse the \p Args list for LTO options and record the type of LTO
+  /// compilation based on which -f(no-)?lto(=.*)? option occurs last.
+  void setLTOMode(const llvm::opt::ArgList &Args);
+
+  /// Retrieves a ToolChain for a particular \p Target triple.
+  ///
+  /// Will cache ToolChains for the life of the driver object, and create them
+  /// on-demand.
+  const ToolChain &getToolChain(const llvm::opt::ArgList &Args,
+                                const llvm::Triple &Target) const;
+
+  /// @}
+
+  /// Retrieves a ToolChain for a particular device \p Target triple
+  ///
+  /// \param[in] HostTC is the host ToolChain paired with the device
+  ///
+  /// \param[in] TargetDeviceOffloadKind (e.g. OFK_Cuda/OFK_OpenMP/OFK_SYCL) is
+  /// an Offloading action that is optionally passed to a ToolChain (used by
+  /// CUDA, to specify if it's used in conjunction with OpenMP)
+  ///
+  /// Will cache ToolChains for the life of the driver object, and create them
+  /// on-demand.
+  const ToolChain &getOffloadingDeviceToolChain(
+      const llvm::opt::ArgList &Args, const llvm::Triple &Target,
+      const ToolChain &HostTC,
+      const Action::OffloadKind &TargetDeviceOffloadKind) const;
+
+  /// Get bitmasks for which option flags to include and exclude based on
+  /// the driver mode.
+  std::pair<unsigned, unsigned> getIncludeExcludeOptionFlagMasks(bool IsClCompatMode) const;
+
+  /// Helper used in BuildJobsForAction.  Doesn't use the cache when building
+  /// jobs specifically for the given action, but will use the cache when
+  /// building jobs for the Action's inputs.
+  InputInfoList 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>, InputInfoList>
+          &CachedResults,
+      Action::OffloadKind TargetDeviceOffloadKind) const;
+
+  /// Return the typical executable name for the specified driver \p Mode.
+  static const char *getExecutableForDriverMode(DriverMode Mode);
+
+public:
+  /// 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). HadExtra is true if all
+  /// groups were parsed but extra characters remain at the end.
+  static bool GetReleaseVersion(StringRef Str, unsigned &Major, unsigned &Minor,
+                                unsigned &Micro, bool &HadExtra);
+
+  /// 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.
+  static bool GetReleaseVersion(StringRef Str,
+                                MutableArrayRef<unsigned> Digits);
+  /// Compute the default -fmodule-cache-path.
+  /// \return True if the system provides a default cache directory.
+  static bool getDefaultModuleCachePath(SmallVectorImpl<char> &Result);
+};
+
+/// \return True if the last defined optimization level is -Ofast.
+/// And False otherwise.
+bool isOptimizationLevelFast(const llvm::opt::ArgList &Args);
+
+/// \return True if the argument combination will end up generating remarks.
+bool willEmitRemarks(const llvm::opt::ArgList &Args);
+
+/// Returns the driver mode option's value, i.e. `X` in `--driver-mode=X`. If \p
+/// Args doesn't mention one explicitly, tries to deduce from `ProgName`.
+/// Returns empty on failure.
+/// Common values are "gcc", "g++", "cpp", "cl" and "flang". Returned value need
+/// not be one of these.
+llvm::StringRef getDriverMode(StringRef ProgName, ArrayRef<const char *> Args);
+
+/// Checks whether the value produced by getDriverMode is for CL mode.
+bool IsClangCL(StringRef DriverMode);
+
+} // end namespace driver
+} // end namespace clang
+
+#endif
+
+#ifdef __GNUC__
+#pragma GCC diagnostic pop
+#endif