Coverage Report

Created: 2020-02-25 14:32

/Users/buildslave/jenkins/workspace/coverage/llvm-project/clang/include/clang/Driver/Driver.h
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//===--- Driver.h - Clang GCC Compatible Driver -----------------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_CLANG_DRIVER_DRIVER_H
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#define LLVM_CLANG_DRIVER_DRIVER_H
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#include "clang/Basic/Diagnostic.h"
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#include "clang/Basic/LLVM.h"
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#include "clang/Driver/Action.h"
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#include "clang/Driver/Options.h"
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#include "clang/Driver/Phases.h"
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#include "clang/Driver/ToolChain.h"
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#include "clang/Driver/Types.h"
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#include "clang/Driver/Util.h"
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#include "llvm/ADT/StringMap.h"
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#include "llvm/ADT/StringRef.h"
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#include "llvm/Option/Arg.h"
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#include "llvm/Option/ArgList.h"
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#include "llvm/Support/StringSaver.h"
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#include <list>
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#include <map>
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#include <string>
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namespace llvm {
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class Triple;
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namespace vfs {
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class FileSystem;
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}
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} // namespace llvm
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namespace clang {
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namespace driver {
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  class Command;
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  class Compilation;
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  class InputInfo;
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  class JobList;
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  class JobAction;
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  class SanitizerArgs;
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  class ToolChain;
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/// Describes the kind of LTO mode selected via -f(no-)?lto(=.*)? options.
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enum LTOKind {
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  LTOK_None,
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  LTOK_Full,
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  LTOK_Thin,
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  LTOK_Unknown
55
};
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/// Driver - Encapsulate logic for constructing compilation processes
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/// from a set of gcc-driver-like command line arguments.
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class Driver {
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  DiagnosticsEngine &Diags;
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  IntrusiveRefCntPtr<llvm::vfs::FileSystem> VFS;
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  enum DriverMode {
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    GCCMode,
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    GXXMode,
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    CPPMode,
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    CLMode,
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    FlangMode
70
  } Mode;
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72
  enum SaveTempsMode {
73
    SaveTempsNone,
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    SaveTempsCwd,
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    SaveTempsObj
76
  } SaveTemps;
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  enum BitcodeEmbedMode {
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    EmbedNone,
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    EmbedMarker,
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    EmbedBitcode
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  } BitcodeEmbed;
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  /// LTO mode selected via -f(no-)?lto(=.*)? options.
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  LTOKind LTOMode;
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public:
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  enum OpenMPRuntimeKind {
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    /// An unknown OpenMP runtime. We can't generate effective OpenMP code
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    /// without knowing what runtime to target.
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    OMPRT_Unknown,
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    /// The LLVM OpenMP runtime. When completed and integrated, this will become
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    /// the default for Clang.
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    OMPRT_OMP,
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    /// The GNU OpenMP runtime. Clang doesn't support generating OpenMP code for
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    /// this runtime but can swallow the pragmas, and find and link against the
99
    /// runtime library itself.
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    OMPRT_GOMP,
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    /// The legacy name for the LLVM OpenMP runtime from when it was the Intel
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    /// OpenMP runtime. We support this mode for users with existing
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    /// dependencies on this runtime library name.
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    OMPRT_IOMP5
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  };
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  // Diag - Forwarding function for diagnostics.
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4.15k
  DiagnosticBuilder Diag(unsigned DiagID) const {
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4.15k
    return Diags.Report(DiagID);
111
4.15k
  }
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  // FIXME: Privatize once interface is stable.
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public:
115
  /// The name the driver was invoked as.
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  std::string Name;
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  /// The path the driver executable was in, as invoked from the
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  /// command line.
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  std::string Dir;
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  /// The original path to the clang executable.
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  std::string ClangExecutable;
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  /// Target and driver mode components extracted from clang executable name.
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  ParsedClangName ClangNameParts;
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  /// The path to the installed clang directory, if any.
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  std::string InstalledDir;
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  /// The path to the compiler resource directory.
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  std::string ResourceDir;
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  /// System directory for config files.
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  std::string SystemConfigDir;
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  /// User directory for config files.
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  std::string UserConfigDir;
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  /// A prefix directory used to emulate a limited subset of GCC's '-Bprefix'
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  /// functionality.
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  /// FIXME: This type of customization should be removed in favor of the
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  /// universal driver when it is ready.
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  typedef SmallVector<std::string, 4> prefix_list;
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  prefix_list PrefixDirs;
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  /// sysroot, if present
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  std::string SysRoot;
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  /// Dynamic loader prefix, if present
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  std::string DyldPrefix;
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  /// Driver title to use with help.
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  std::string DriverTitle;
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  /// Information about the host which can be overridden by the user.
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  std::string HostBits, HostMachine, HostSystem, HostRelease;
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  /// The file to log CC_PRINT_OPTIONS output to, if enabled.
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  const char *CCPrintOptionsFilename;
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  /// The file to log CC_PRINT_HEADERS output to, if enabled.
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  const char *CCPrintHeadersFilename;
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  /// The file to log CC_LOG_DIAGNOSTICS output to, if enabled.
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  const char *CCLogDiagnosticsFilename;
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  /// A list of inputs and their types for the given arguments.
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  typedef SmallVector<std::pair<types::ID, const llvm::opt::Arg *>, 16>
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      InputList;
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  /// Whether the driver should follow g++ like behavior.
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97.2k
  bool CCCIsCXX() const { return Mode == GXXMode; }
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  /// Whether the driver is just the preprocessor.
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88.8k
  bool CCCIsCPP() const { return Mode == CPPMode; }
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  /// Whether the driver should follow gcc like behavior.
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  bool CCCIsCC() const { return Mode == GCCMode; }
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  /// Whether the driver should follow cl.exe like behavior.
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237k
  bool IsCLMode() const { return Mode == CLMode; }
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  /// Whether the driver should invoke flang for fortran inputs.
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  /// Other modes fall back to calling gcc which in turn calls gfortran.
186
61.0k
  bool IsFlangMode() const { return Mode == FlangMode; }
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  /// Only print tool bindings, don't build any jobs.
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  unsigned CCCPrintBindings : 1;
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  /// Set CC_PRINT_OPTIONS mode, which is like -v but logs the commands to
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  /// CCPrintOptionsFilename or to stderr.
193
  unsigned CCPrintOptions : 1;
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  /// Set CC_PRINT_HEADERS mode, which causes the frontend to log header include
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  /// information to CCPrintHeadersFilename or to stderr.
197
  unsigned CCPrintHeaders : 1;
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  /// Set CC_LOG_DIAGNOSTICS mode, which causes the frontend to log diagnostics
200
  /// to CCLogDiagnosticsFilename or to stderr, in a stable machine readable
201
  /// format.
202
  unsigned CCLogDiagnostics : 1;
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  /// Whether the driver is generating diagnostics for debugging purposes.
205
  unsigned CCGenDiagnostics : 1;
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  /// Pointer to the ExecuteCC1Tool function, if available.
208
  /// When the clangDriver lib is used through clang.exe, this provides a
209
  /// shortcut for executing the -cc1 command-line directly, in the same
210
  /// process.
211
  typedef int (*CC1ToolFunc)(SmallVectorImpl<const char *> &ArgV);
212
  CC1ToolFunc CC1Main = nullptr;
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private:
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  /// Raw target triple.
216
  std::string TargetTriple;
217
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  /// Name to use when invoking gcc/g++.
219
  std::string CCCGenericGCCName;
220
221
  /// Name of configuration file if used.
222
  std::string ConfigFile;
223
224
  /// Allocator for string saver.
225
  llvm::BumpPtrAllocator Alloc;
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  /// Object that stores strings read from configuration file.
228
  llvm::StringSaver Saver;
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  /// Arguments originated from configuration file.
231
  std::unique_ptr<llvm::opt::InputArgList> CfgOptions;
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  /// Arguments originated from command line.
234
  std::unique_ptr<llvm::opt::InputArgList> CLOptions;
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  /// Whether to check that input files exist when constructing compilation
237
  /// jobs.
238
  unsigned CheckInputsExist : 1;
239
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public:
241
  /// Force clang to emit reproducer for driver invocation. This is enabled
242
  /// indirectly by setting FORCE_CLANG_DIAGNOSTICS_CRASH environment variable
243
  /// or when using the -gen-reproducer driver flag.
244
  unsigned GenReproducer : 1;
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246
private:
247
  /// Certain options suppress the 'no input files' warning.
248
  unsigned SuppressMissingInputWarning : 1;
249
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  /// Cache of all the ToolChains in use by the driver.
251
  ///
252
  /// This maps from the string representation of a triple to a ToolChain
253
  /// created targeting that triple. The driver owns all the ToolChain objects
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  /// stored in it, and will clean them up when torn down.
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  mutable llvm::StringMap<std::unique_ptr<ToolChain>> ToolChains;
256
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private:
258
  /// TranslateInputArgs - Create a new derived argument list from the input
259
  /// arguments, after applying the standard argument translations.
260
  llvm::opt::DerivedArgList *
261
  TranslateInputArgs(const llvm::opt::InputArgList &Args) const;
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  // getFinalPhase - Determine which compilation mode we are in and record
264
  // which option we used to determine the final phase.
265
  // TODO: Much of what getFinalPhase returns are not actually true compiler
266
  //       modes. Fold this functionality into Types::getCompilationPhases and
267
  //       handleArguments.
268
  phases::ID getFinalPhase(const llvm::opt::DerivedArgList &DAL,
269
                           llvm::opt::Arg **FinalPhaseArg = nullptr) const;
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  // handleArguments - All code related to claiming and printing diagnostics
272
  // related to arguments to the driver are done here.
273
  void handleArguments(Compilation &C, llvm::opt::DerivedArgList &Args,
274
                       const InputList &Inputs, ActionList &Actions) const;
275
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  // Before executing jobs, sets up response files for commands that need them.
277
  void setUpResponseFiles(Compilation &C, Command &Cmd);
278
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  void generatePrefixedToolNames(StringRef Tool, const ToolChain &TC,
280
                                 SmallVectorImpl<std::string> &Names) const;
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  /// Find the appropriate .crash diagonostic file for the child crash
283
  /// under this driver and copy it out to a temporary destination with the
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  /// other reproducer related files (.sh, .cache, etc). If not found, suggest a
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  /// directory for the user to look at.
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  ///
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  /// \param ReproCrashFilename The file path to copy the .crash to.
288
  /// \param CrashDiagDir       The suggested directory for the user to look at
289
  ///                           in case the search or copy fails.
290
  ///
291
  /// \returns If the .crash is found and successfully copied return true,
292
  /// otherwise false and return the suggested directory in \p CrashDiagDir.
293
  bool getCrashDiagnosticFile(StringRef ReproCrashFilename,
294
                              SmallString<128> &CrashDiagDir);
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public:
297
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  /// Takes the path to a binary that's either in bin/ or lib/ and returns
299
  /// the path to clang's resource directory.
300
  static std::string GetResourcesPath(StringRef BinaryPath,
301
                                      StringRef CustomResourceDir = "");
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  Driver(StringRef ClangExecutable, StringRef TargetTriple,
304
         DiagnosticsEngine &Diags,
305
         IntrusiveRefCntPtr<llvm::vfs::FileSystem> VFS = nullptr);
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307
  /// @name Accessors
308
  /// @{
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  /// Name to use when invoking gcc/g++.
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256
  const std::string &getCCCGenericGCCName() const { return CCCGenericGCCName; }
312
313
0
  const std::string &getConfigFile() const { return ConfigFile; }
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315
790k
  const llvm::opt::OptTable &getOpts() const { return getDriverOptTable(); }
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26.6k
  const DiagnosticsEngine &getDiags() const { return Diags; }
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1.00M
  llvm::vfs::FileSystem &getVFS() const { return *VFS; }
320
321
29.4k
  bool getCheckInputsExist() const { return CheckInputsExist; }
322
323
2.40k
  void setCheckInputsExist(bool Value) { CheckInputsExist = Value; }
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18.6k
  void setTargetAndMode(const ParsedClangName &TM) { ClangNameParts = TM; }
326
327
0
  const std::string &getTitle() { return DriverTitle; }
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8.97k
  void setTitle(std::string Value) { DriverTitle = std::move(Value); }
329
330
37.0k
  std::string getTargetTriple() const { return TargetTriple; }
331
332
  /// Get the path to the main clang executable.
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26.9k
  const char *getClangProgramPath() const {
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26.9k
    return ClangExecutable.c_str();
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26.9k
  }
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337
  /// Get the path to where the clang executable was installed.
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72.8k
  const char *getInstalledDir() const {
339
72.8k
    if (!InstalledDir.empty())
340
42.8k
      return InstalledDir.c_str();
341
30.0k
    return Dir.c_str();
342
30.0k
  }
343
18.6k
  void setInstalledDir(StringRef Value) { InstalledDir = std::string(Value); }
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123k
  bool isSaveTempsEnabled() const { return SaveTemps != SaveTempsNone; }
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379
  bool isSaveTempsObj() const { return SaveTemps == SaveTempsObj; }
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12.2k
  bool embedBitcodeEnabled() const { return BitcodeEmbed != EmbedNone; }
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61.3k
  bool embedBitcodeInObject() const { return (BitcodeEmbed == EmbedBitcode); }
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35.6k
  bool embedBitcodeMarkerOnly() const { return (BitcodeEmbed == EmbedMarker); }
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352
  /// Compute the desired OpenMP runtime from the flags provided.
353
  OpenMPRuntimeKind getOpenMPRuntime(const llvm::opt::ArgList &Args) const;
354
355
  /// @}
356
  /// @name Primary Functionality
357
  /// @{
358
359
  /// CreateOffloadingDeviceToolChains - create all the toolchains required to
360
  /// support offloading devices given the programming models specified in the
361
  /// current compilation. Also, update the host tool chain kind accordingly.
362
  void CreateOffloadingDeviceToolChains(Compilation &C, InputList &Inputs);
363
364
  /// BuildCompilation - Construct a compilation object for a command
365
  /// line argument vector.
366
  ///
367
  /// \return A compilation, or 0 if none was built for the given
368
  /// argument vector. A null return value does not necessarily
369
  /// indicate an error condition, the diagnostics should be queried
370
  /// to determine if an error occurred.
371
  Compilation *BuildCompilation(ArrayRef<const char *> Args);
372
373
  /// @name Driver Steps
374
  /// @{
375
376
  /// ParseDriverMode - Look for and handle the driver mode option in Args.
377
  void ParseDriverMode(StringRef ProgramName, ArrayRef<const char *> Args);
378
379
  /// ParseArgStrings - Parse the given list of strings into an
380
  /// ArgList.
381
  llvm::opt::InputArgList ParseArgStrings(ArrayRef<const char *> Args,
382
                                          bool IsClCompatMode,
383
                                          bool &ContainsError);
384
385
  /// BuildInputs - Construct the list of inputs and their types from
386
  /// the given arguments.
387
  ///
388
  /// \param TC - The default host tool chain.
389
  /// \param Args - The input arguments.
390
  /// \param Inputs - The list to store the resulting compilation
391
  /// inputs onto.
392
  void BuildInputs(const ToolChain &TC, llvm::opt::DerivedArgList &Args,
393
                   InputList &Inputs) const;
394
395
  /// BuildActions - Construct the list of actions to perform for the
396
  /// given arguments, which are only done for a single architecture.
397
  ///
398
  /// \param C - The compilation that is being built.
399
  /// \param Args - The input arguments.
400
  /// \param Actions - The list to store the resulting actions onto.
401
  void BuildActions(Compilation &C, llvm::opt::DerivedArgList &Args,
402
                    const InputList &Inputs, ActionList &Actions) const;
403
404
  /// BuildUniversalActions - Construct the list of actions to perform
405
  /// for the given arguments, which may require a universal build.
406
  ///
407
  /// \param C - The compilation that is being built.
408
  /// \param TC - The default host tool chain.
409
  void BuildUniversalActions(Compilation &C, const ToolChain &TC,
410
                             const InputList &BAInputs) const;
411
412
  /// Check that the file referenced by Value exists. If it doesn't,
413
  /// issue a diagnostic and return false.
414
  /// If TypoCorrect is true and the file does not exist, see if it looks
415
  /// like a likely typo for a flag and if so print a "did you mean" blurb.
416
  bool DiagnoseInputExistence(const llvm::opt::DerivedArgList &Args,
417
                              StringRef Value, types::ID Ty,
418
                              bool TypoCorrect) const;
419
420
  /// BuildJobs - Bind actions to concrete tools and translate
421
  /// arguments to form the list of jobs to run.
422
  ///
423
  /// \param C - The compilation that is being built.
424
  void BuildJobs(Compilation &C) const;
425
426
  /// ExecuteCompilation - Execute the compilation according to the command line
427
  /// arguments and return an appropriate exit code.
428
  ///
429
  /// This routine handles additional processing that must be done in addition
430
  /// to just running the subprocesses, for example reporting errors, setting
431
  /// up response files, removing temporary files, etc.
432
  int ExecuteCompilation(Compilation &C,
433
     SmallVectorImpl< std::pair<int, const Command *> > &FailingCommands);
434
435
  /// Contains the files in the compilation diagnostic report generated by
436
  /// generateCompilationDiagnostics.
437
  struct CompilationDiagnosticReport {
438
    llvm::SmallVector<std::string, 4> TemporaryFiles;
439
  };
440
441
  /// generateCompilationDiagnostics - Generate diagnostics information
442
  /// including preprocessed source file(s).
443
  ///
444
  void generateCompilationDiagnostics(
445
      Compilation &C, const Command &FailingCommand,
446
      StringRef AdditionalInformation = "",
447
      CompilationDiagnosticReport *GeneratedReport = nullptr);
448
449
  /// @}
450
  /// @name Helper Methods
451
  /// @{
452
453
  /// PrintActions - Print the list of actions.
454
  void PrintActions(const Compilation &C) const;
455
456
  /// PrintHelp - Print the help text.
457
  ///
458
  /// \param ShowHidden - Show hidden options.
459
  void PrintHelp(bool ShowHidden) const;
460
461
  /// PrintVersion - Print the driver version.
462
  void PrintVersion(const Compilation &C, raw_ostream &OS) const;
463
464
  /// GetFilePath - Lookup \p Name in the list of file search paths.
465
  ///
466
  /// \param TC - The tool chain for additional information on
467
  /// directories to search.
468
  //
469
  // FIXME: This should be in CompilationInfo.
470
  std::string GetFilePath(StringRef Name, const ToolChain &TC) const;
471
472
  /// GetProgramPath - Lookup \p Name in the list of program search paths.
473
  ///
474
  /// \param TC - The provided tool chain for additional information on
475
  /// directories to search.
476
  //
477
  // FIXME: This should be in CompilationInfo.
478
  std::string GetProgramPath(StringRef Name, const ToolChain &TC) const;
479
480
  /// HandleAutocompletions - Handle --autocomplete by searching and printing
481
  /// possible flags, descriptions, and its arguments.
482
  void HandleAutocompletions(StringRef PassedFlags) const;
483
484
  /// HandleImmediateArgs - Handle any arguments which should be
485
  /// treated before building actions or binding tools.
486
  ///
487
  /// \return Whether any compilation should be built for this
488
  /// invocation.
489
  bool HandleImmediateArgs(const Compilation &C);
490
491
  /// ConstructAction - Construct the appropriate action to do for
492
  /// \p Phase on the \p Input, taking in to account arguments
493
  /// like -fsyntax-only or --analyze.
494
  Action *ConstructPhaseAction(
495
      Compilation &C, const llvm::opt::ArgList &Args, phases::ID Phase,
496
      Action *Input,
497
      Action::OffloadKind TargetDeviceOffloadKind = Action::OFK_None) const;
498
499
  /// BuildJobsForAction - Construct the jobs to perform for the action \p A and
500
  /// return an InputInfo for the result of running \p A.  Will only construct
501
  /// jobs for a given (Action, ToolChain, BoundArch, DeviceKind) tuple once.
502
  InputInfo
503
  BuildJobsForAction(Compilation &C, const Action *A, const ToolChain *TC,
504
                     StringRef BoundArch, bool AtTopLevel, bool MultipleArchs,
505
                     const char *LinkingOutput,
506
                     std::map<std::pair<const Action *, std::string>, InputInfo>
507
                         &CachedResults,
508
                     Action::OffloadKind TargetDeviceOffloadKind) const;
509
510
  /// Returns the default name for linked images (e.g., "a.out").
511
  const char *getDefaultImageName() const;
512
513
  /// GetNamedOutputPath - Return the name to use for the output of
514
  /// the action \p JA. The result is appended to the compilation's
515
  /// list of temporary or result files, as appropriate.
516
  ///
517
  /// \param C - The compilation.
518
  /// \param JA - The action of interest.
519
  /// \param BaseInput - The original input file that this action was
520
  /// triggered by.
521
  /// \param BoundArch - The bound architecture.
522
  /// \param AtTopLevel - Whether this is a "top-level" action.
523
  /// \param MultipleArchs - Whether multiple -arch options were supplied.
524
  /// \param NormalizedTriple - The normalized triple of the relevant target.
525
  const char *GetNamedOutputPath(Compilation &C, const JobAction &JA,
526
                                 const char *BaseInput, StringRef BoundArch,
527
                                 bool AtTopLevel, bool MultipleArchs,
528
                                 StringRef NormalizedTriple) const;
529
530
  /// GetTemporaryPath - Return the pathname of a temporary file to use
531
  /// as part of compilation; the file will have the given prefix and suffix.
532
  ///
533
  /// GCC goes to extra lengths here to be a bit more robust.
534
  std::string GetTemporaryPath(StringRef Prefix, StringRef Suffix) const;
535
536
  /// GetTemporaryDirectory - Return the pathname of a temporary directory to
537
  /// use as part of compilation; the directory will have the given prefix.
538
  std::string GetTemporaryDirectory(StringRef Prefix) const;
539
540
  /// Return the pathname of the pch file in clang-cl mode.
541
  std::string GetClPchPath(Compilation &C, StringRef BaseName) const;
542
543
  /// ShouldUseClangCompiler - Should the clang compiler be used to
544
  /// handle this action.
545
  bool ShouldUseClangCompiler(const JobAction &JA) const;
546
547
  /// ShouldUseFlangCompiler - Should the flang compiler be used to
548
  /// handle this action.
549
  bool ShouldUseFlangCompiler(const JobAction &JA) const;
550
551
  /// Returns true if we are performing any kind of LTO.
552
29.4k
  bool isUsingLTO() const { return LTOMode != LTOK_None; }
553
554
  /// Get the specific kind of LTO being performed.
555
125
  LTOKind getLTOMode() const { return LTOMode; }
556
557
private:
558
559
  /// Tries to load options from configuration file.
560
  ///
561
  /// \returns true if error occurred.
562
  bool loadConfigFile();
563
564
  /// Read options from the specified file.
565
  ///
566
  /// \param [in] FileName File to read.
567
  /// \returns true, if error occurred while reading.
568
  bool readConfigFile(StringRef FileName);
569
570
  /// Set the driver mode (cl, gcc, etc) from an option string of the form
571
  /// --driver-mode=<mode>.
572
  void setDriverModeFromOption(StringRef Opt);
573
574
  /// Parse the \p Args list for LTO options and record the type of LTO
575
  /// compilation based on which -f(no-)?lto(=.*)? option occurs last.
576
  void setLTOMode(const llvm::opt::ArgList &Args);
577
578
  /// Retrieves a ToolChain for a particular \p Target triple.
579
  ///
580
  /// Will cache ToolChains for the life of the driver object, and create them
581
  /// on-demand.
582
  const ToolChain &getToolChain(const llvm::opt::ArgList &Args,
583
                                const llvm::Triple &Target) const;
584
585
  /// @}
586
587
  /// Get bitmasks for which option flags to include and exclude based on
588
  /// the driver mode.
589
  std::pair<unsigned, unsigned> getIncludeExcludeOptionFlagMasks(bool IsClCompatMode) const;
590
591
  /// Helper used in BuildJobsForAction.  Doesn't use the cache when building
592
  /// jobs specifically for the given action, but will use the cache when
593
  /// building jobs for the Action's inputs.
594
  InputInfo BuildJobsForActionNoCache(
595
      Compilation &C, const Action *A, const ToolChain *TC, StringRef BoundArch,
596
      bool AtTopLevel, bool MultipleArchs, const char *LinkingOutput,
597
      std::map<std::pair<const Action *, std::string>, InputInfo>
598
          &CachedResults,
599
      Action::OffloadKind TargetDeviceOffloadKind) const;
600
601
public:
602
  /// GetReleaseVersion - Parse (([0-9]+)(.([0-9]+)(.([0-9]+)?))?)? and
603
  /// return the grouped values as integers. Numbers which are not
604
  /// provided are set to 0.
605
  ///
606
  /// \return True if the entire string was parsed (9.2), or all
607
  /// groups were parsed (10.3.5extrastuff). HadExtra is true if all
608
  /// groups were parsed but extra characters remain at the end.
609
  static bool GetReleaseVersion(StringRef Str, unsigned &Major, unsigned &Minor,
610
                                unsigned &Micro, bool &HadExtra);
611
612
  /// Parse digits from a string \p Str and fulfill \p Digits with
613
  /// the parsed numbers. This method assumes that the max number of
614
  /// digits to look for is equal to Digits.size().
615
  ///
616
  /// \return True if the entire string was parsed and there are
617
  /// no extra characters remaining at the end.
618
  static bool GetReleaseVersion(StringRef Str,
619
                                MutableArrayRef<unsigned> Digits);
620
  /// Compute the default -fmodule-cache-path.
621
  static void getDefaultModuleCachePath(SmallVectorImpl<char> &Result);
622
};
623
624
/// \return True if the last defined optimization level is -Ofast.
625
/// And False otherwise.
626
bool isOptimizationLevelFast(const llvm::opt::ArgList &Args);
627
628
/// \return True if the argument combination will end up generating remarks.
629
bool willEmitRemarks(const llvm::opt::ArgList &Args);
630
631
} // end namespace driver
632
} // end namespace clang
633
634
#endif