Coverage Report

Created: 2019-07-24 05:18

/Users/buildslave/jenkins/workspace/clang-stage2-coverage-R/llvm/tools/clang/include/clang/Driver/ToolChain.h
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//===- ToolChain.h - Collections of tools for one platform ------*- 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_TOOLCHAIN_H
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#define LLVM_CLANG_DRIVER_TOOLCHAIN_H
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#include "clang/Basic/DebugInfoOptions.h"
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#include "clang/Basic/LLVM.h"
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#include "clang/Basic/LangOptions.h"
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#include "clang/Basic/Sanitizers.h"
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#include "clang/Driver/Action.h"
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#include "clang/Driver/Multilib.h"
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#include "clang/Driver/Types.h"
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#include "llvm/ADT/ArrayRef.h"
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#include "llvm/ADT/SmallVector.h"
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#include "llvm/ADT/StringRef.h"
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#include "llvm/ADT/Triple.h"
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#include "llvm/MC/MCTargetOptions.h"
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#include "llvm/Option/Option.h"
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#include "llvm/Support/VersionTuple.h"
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#include "llvm/Target/TargetOptions.h"
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#include <cassert>
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#include <memory>
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#include <string>
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#include <utility>
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namespace llvm {
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namespace opt {
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class Arg;
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class ArgList;
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class DerivedArgList;
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} // namespace opt
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namespace vfs {
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class FileSystem;
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} // namespace vfs
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} // namespace llvm
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namespace clang {
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class ObjCRuntime;
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namespace driver {
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class Driver;
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class InputInfo;
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class SanitizerArgs;
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class Tool;
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class XRayArgs;
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/// Helper structure used to pass information extracted from clang executable
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/// name such as `i686-linux-android-g++`.
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struct ParsedClangName {
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  /// Target part of the executable name, as `i686-linux-android`.
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  std::string TargetPrefix;
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  /// Driver mode part of the executable name, as `g++`.
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  std::string ModeSuffix;
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  /// Corresponding driver mode argument, as '--driver-mode=g++'
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  const char *DriverMode = nullptr;
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  /// True if TargetPrefix is recognized as a registered target name.
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  bool TargetIsValid = false;
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30.4k
  ParsedClangName() = default;
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  ParsedClangName(std::string Suffix, const char *Mode)
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68.0k
      : ModeSuffix(Suffix), DriverMode(Mode) {}
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  ParsedClangName(std::string Target, std::string Suffix, const char *Mode,
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                  bool IsRegistered)
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      : TargetPrefix(Target), ModeSuffix(Suffix), DriverMode(Mode),
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32
        TargetIsValid(IsRegistered) {}
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30.3k
  bool isEmpty() const {
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30.3k
    return TargetPrefix.empty() && 
ModeSuffix.empty()30.2k
&&
DriverMode == nullptr8.16k
;
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30.3k
  }
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};
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/// ToolChain - Access to tools for a single platform.
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class ToolChain {
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public:
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  using path_list = SmallVector<std::string, 16>;
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  enum CXXStdlibType {
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    CST_Libcxx,
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    CST_Libstdcxx
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  };
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  enum RuntimeLibType {
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    RLT_CompilerRT,
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    RLT_Libgcc
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  };
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  enum UnwindLibType {
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    UNW_None,
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    UNW_CompilerRT,
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    UNW_Libgcc
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  };
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  enum RTTIMode {
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    RM_Enabled,
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    RM_Disabled,
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  };
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  enum FileType { FT_Object, FT_Static, FT_Shared };
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private:
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  friend class RegisterEffectiveTriple;
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  const Driver &D;
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  llvm::Triple Triple;
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  const llvm::opt::ArgList &Args;
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  // We need to initialize CachedRTTIArg before CachedRTTIMode
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  const llvm::opt::Arg *const CachedRTTIArg;
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  const RTTIMode CachedRTTIMode;
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  /// The list of toolchain specific path prefixes to search for libraries.
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  path_list LibraryPaths;
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  /// The list of toolchain specific path prefixes to search for files.
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  path_list FilePaths;
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  /// The list of toolchain specific path prefixes to search for programs.
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  path_list ProgramPaths;
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  mutable std::unique_ptr<Tool> Clang;
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  mutable std::unique_ptr<Tool> Assemble;
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  mutable std::unique_ptr<Tool> Link;
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  mutable std::unique_ptr<Tool> OffloadBundler;
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  Tool *getClang() const;
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  Tool *getAssemble() const;
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  Tool *getLink() const;
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  Tool *getClangAs() const;
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  Tool *getOffloadBundler() const;
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  mutable std::unique_ptr<SanitizerArgs> SanitizerArguments;
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  mutable std::unique_ptr<XRayArgs> XRayArguments;
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  /// The effective clang triple for the current Job.
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  mutable llvm::Triple EffectiveTriple;
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  /// Set the toolchain's effective clang triple.
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75.5k
  void setEffectiveTriple(llvm::Triple ET) const {
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75.5k
    EffectiveTriple = std::move(ET);
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75.5k
  }
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protected:
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  MultilibSet Multilibs;
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  Multilib SelectedMultilib;
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  ToolChain(const Driver &D, const llvm::Triple &T,
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            const llvm::opt::ArgList &Args);
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  void setTripleEnvironment(llvm::Triple::EnvironmentType Env);
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  virtual Tool *buildAssembler() const;
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  virtual Tool *buildLinker() const;
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  virtual Tool *getTool(Action::ActionClass AC) const;
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  /// \name Utilities for implementing subclasses.
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  ///@{
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  static void addSystemInclude(const llvm::opt::ArgList &DriverArgs,
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                               llvm::opt::ArgStringList &CC1Args,
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                               const Twine &Path);
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  static void addExternCSystemInclude(const llvm::opt::ArgList &DriverArgs,
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                                      llvm::opt::ArgStringList &CC1Args,
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                                      const Twine &Path);
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  static void
180
      addExternCSystemIncludeIfExists(const llvm::opt::ArgList &DriverArgs,
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                                      llvm::opt::ArgStringList &CC1Args,
182
                                      const Twine &Path);
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  static void addSystemIncludes(const llvm::opt::ArgList &DriverArgs,
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                                llvm::opt::ArgStringList &CC1Args,
185
                                ArrayRef<StringRef> Paths);
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  ///@}
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public:
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  virtual ~ToolChain();
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  // Accessors
192
193
751k
  const Driver &getDriver() const { return D; }
194
  llvm::vfs::FileSystem &getVFS() const;
195
1.39M
  const llvm::Triple &getTriple() const { return Triple; }
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  /// Get the toolchain's aux triple, if it has one.
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  ///
199
  /// Exactly what the aux triple represents depends on the toolchain, but for
200
  /// example when compiling CUDA code for the GPU, the triple might be NVPTX,
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  /// while the aux triple is the host (CPU) toolchain, e.g. x86-linux-gnu.
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  virtual const llvm::Triple *getAuxTriple() const { return nullptr; }
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  /// Some toolchains need to modify the file name, for example to replace the
205
  /// extension for object files with .cubin for OpenMP offloading to Nvidia
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  /// GPUs.
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  virtual std::string getInputFilename(const InputInfo &Input) const;
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209
385k
  llvm::Triple::ArchType getArch() const { return Triple.getArch(); }
210
2
  StringRef getArchName() const { return Triple.getArchName(); }
211
0
  StringRef getPlatform() const { return Triple.getVendorName(); }
212
38.5k
  StringRef getOS() const { return Triple.getOSName(); }
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  /// Provide the default architecture name (as expected by -arch) for
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  /// this toolchain.
216
  StringRef getDefaultUniversalArchName() const;
217
218
18.3k
  std::string getTripleString() const {
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18.3k
    return Triple.getTriple();
220
18.3k
  }
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222
  /// Get the toolchain's effective clang triple.
223
111k
  const llvm::Triple &getEffectiveTriple() const {
224
111k
    assert(!EffectiveTriple.getTriple().empty() && "No effective triple");
225
111k
    return EffectiveTriple;
226
111k
  }
227
228
25
  path_list &getLibraryPaths() { return LibraryPaths; }
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8.88k
  const path_list &getLibraryPaths() const { return LibraryPaths; }
230
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4.53k
  path_list &getFilePaths() { return FilePaths; }
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9.75k
  const path_list &getFilePaths() const { return FilePaths; }
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234
40.6k
  path_list &getProgramPaths() { return ProgramPaths; }
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5.09k
  const path_list &getProgramPaths() const { return ProgramPaths; }
236
237
1
  const MultilibSet &getMultilibs() const { return Multilibs; }
238
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3
  const Multilib &getMultilib() const { return SelectedMultilib; }
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  const SanitizerArgs& getSanitizerArgs() const;
242
243
  const XRayArgs& getXRayArgs() const;
244
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  // Returns the Arg * that explicitly turned on/off rtti, or nullptr.
246
4
  const llvm::opt::Arg *getRTTIArg() const { return CachedRTTIArg; }
247
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  // Returns the RTTIMode for the toolchain with the current arguments.
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60.6k
  RTTIMode getRTTIMode() const { return CachedRTTIMode; }
250
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  /// Return any implicit target and/or mode flag for an invocation of
252
  /// the compiler driver as `ProgName`.
253
  ///
254
  /// For example, when called with i686-linux-android-g++, the first element
255
  /// of the return value will be set to `"i686-linux-android"` and the second
256
  /// will be set to "--driver-mode=g++"`.
257
  /// It is OK if the target name is not registered. In this case the return
258
  /// value contains false in the field TargetIsValid.
259
  ///
260
  /// \pre `llvm::InitializeAllTargets()` has been called.
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  /// \param ProgName The name the Clang driver was invoked with (from,
262
  /// e.g., argv[0]).
263
  /// \return A structure of type ParsedClangName that contains the executable
264
  /// name parts.
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  static ParsedClangName getTargetAndModeFromProgramName(StringRef ProgName);
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  // Tool access.
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  /// TranslateArgs - Create a new derived argument list for any argument
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  /// translations this ToolChain may wish to perform, or 0 if no tool chain
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  /// specific translations are needed. If \p DeviceOffloadKind is specified
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  /// the translation specific for that offload kind is performed.
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  ///
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  /// \param BoundArch - The bound architecture name, or 0.
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  /// \param DeviceOffloadKind - The device offload kind used for the
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  /// translation.
277
  virtual llvm::opt::DerivedArgList *
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  TranslateArgs(const llvm::opt::DerivedArgList &Args, StringRef BoundArch,
279
478
                Action::OffloadKind DeviceOffloadKind) const {
280
478
    return nullptr;
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478
  }
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283
  /// TranslateOpenMPTargetArgs - Create a new derived argument list for
284
  /// that contains the OpenMP target specific flags passed via
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  /// -Xopenmp-target -opt=val OR -Xopenmp-target=<triple> -opt=val
286
  virtual llvm::opt::DerivedArgList *TranslateOpenMPTargetArgs(
287
      const llvm::opt::DerivedArgList &Args, bool SameTripleAsHost,
288
      SmallVectorImpl<llvm::opt::Arg *> &AllocatedArgs) const;
289
290
  /// Choose a tool to use to handle the action \p JA.
291
  ///
292
  /// This can be overridden when a particular ToolChain needs to use
293
  /// a compiler other than Clang.
294
  virtual Tool *SelectTool(const JobAction &JA) const;
295
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  // Helper methods
297
298
  std::string GetFilePath(const char *Name) const;
299
  std::string GetProgramPath(const char *Name) const;
300
301
  /// Returns the linker path, respecting the -fuse-ld= argument to determine
302
  /// the linker suffix or name.
303
  std::string GetLinkerPath() const;
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305
  /// Dispatch to the specific toolchain for verbose printing.
306
  ///
307
  /// This is used when handling the verbose option to print detailed,
308
  /// toolchain-specific information useful for understanding the behavior of
309
  /// the driver on a specific platform.
310
14
  virtual void printVerboseInfo(raw_ostream &OS) const {}
311
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  // Platform defaults information
313
314
  /// Returns true if the toolchain is targeting a non-native
315
  /// architecture.
316
  virtual bool isCrossCompiling() const;
317
318
  /// HasNativeLTOLinker - Check whether the linker and related tools have
319
  /// native LLVM support.
320
  virtual bool HasNativeLLVMSupport() const;
321
322
  /// LookupTypeForExtension - Return the default language type to use for the
323
  /// given extension.
324
  virtual types::ID LookupTypeForExtension(StringRef Ext) const;
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  /// IsBlocksDefault - Does this tool chain enable -fblocks by default.
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8.73k
  virtual bool IsBlocksDefault() const { return false; }
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329
  /// IsIntegratedAssemblerDefault - Does this tool chain enable -integrated-as
330
  /// by default.
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655
  virtual bool IsIntegratedAssemblerDefault() const { return false; }
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333
  /// Check if the toolchain should use the integrated assembler.
334
  virtual bool useIntegratedAs() const;
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336
  /// IsMathErrnoDefault - Does this tool chain use -fmath-errno by default.
337
7.58k
  virtual bool IsMathErrnoDefault() const { return true; }
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  /// IsEncodeExtendedBlockSignatureDefault - Does this tool chain enable
340
  /// -fencode-extended-block-signature by default.
341
8.73k
  virtual bool IsEncodeExtendedBlockSignatureDefault() const { return false; }
342
343
  /// IsObjCNonFragileABIDefault - Does this tool chain set
344
  /// -fobjc-nonfragile-abi by default.
345
8.16k
  virtual bool IsObjCNonFragileABIDefault() const { return false; }
346
347
  /// UseObjCMixedDispatchDefault - When using non-legacy dispatch, should the
348
  /// mixed dispatch method be used?
349
0
  virtual bool UseObjCMixedDispatch() const { return false; }
350
351
  /// Check whether to enable x86 relax relocations by default.
352
  virtual bool useRelaxRelocations() const;
353
354
  /// GetDefaultStackProtectorLevel - Get the default stack protector level for
355
  /// this tool chain (0=off, 1=on, 2=strong, 3=all).
356
8.95k
  virtual unsigned GetDefaultStackProtectorLevel(bool KernelOrKext) const {
357
8.95k
    return 0;
358
8.95k
  }
359
360
  /// Get the default trivial automatic variable initialization.
361
  virtual LangOptions::TrivialAutoVarInitKind
362
29.5k
  GetDefaultTrivialAutoVarInit() const {
363
29.5k
    return LangOptions::TrivialAutoVarInitKind::Uninitialized;
364
29.5k
  }
365
366
  /// GetDefaultLinker - Get the default linker to use.
367
4.31k
  virtual const char *getDefaultLinker() const { return "ld"; }
368
369
  /// GetDefaultRuntimeLibType - Get the default runtime library variant to use.
370
8.36k
  virtual RuntimeLibType GetDefaultRuntimeLibType() const {
371
8.36k
    return ToolChain::RLT_Libgcc;
372
8.36k
  }
373
374
1.96k
  virtual CXXStdlibType GetDefaultCXXStdlibType() const {
375
1.96k
    return ToolChain::CST_Libstdcxx;
376
1.96k
  }
377
378
0
  virtual UnwindLibType GetDefaultUnwindLibType() const {
379
0
    return ToolChain::UNW_None;
380
0
  }
381
382
  virtual std::string getCompilerRTPath() const;
383
384
  virtual std::string getCompilerRT(const llvm::opt::ArgList &Args,
385
                                    StringRef Component,
386
                                    FileType Type = ToolChain::FT_Static) const;
387
388
  const char *
389
  getCompilerRTArgString(const llvm::opt::ArgList &Args, StringRef Component,
390
                         FileType Type = ToolChain::FT_Static) const;
391
392
  // Returns target specific runtime path if it exists.
393
  virtual Optional<std::string> getRuntimePath() const;
394
395
  // Returns target specific C++ library path if it exists.
396
  virtual Optional<std::string> getCXXStdlibPath() const;
397
398
  // Returns <ResourceDir>/lib/<OSName>/<arch>.  This is used by runtimes (such
399
  // as OpenMP) to find arch-specific libraries.
400
  std::string getArchSpecificLibPath() const;
401
402
  // Returns <OSname> part of above.
403
  StringRef getOSLibName() const;
404
405
  /// needsProfileRT - returns true if instrumentation profile is on.
406
  static bool needsProfileRT(const llvm::opt::ArgList &Args);
407
408
  /// Returns true if gcov instrumentation (-fprofile-arcs or --coverage) is on.
409
  static bool needsGCovInstrumentation(const llvm::opt::ArgList &Args);
410
411
  /// IsUnwindTablesDefault - Does this tool chain use -funwind-tables
412
  /// by default.
413
  virtual bool IsUnwindTablesDefault(const llvm::opt::ArgList &Args) const;
414
415
  /// Test whether this toolchain defaults to PIC.
416
  virtual bool isPICDefault() const = 0;
417
418
  /// Test whether this toolchain defaults to PIE.
419
  virtual bool isPIEDefault() const = 0;
420
421
  /// Test whether this toolchaind defaults to non-executable stacks.
422
  virtual bool isNoExecStackDefault() const;
423
424
  /// Tests whether this toolchain forces its default for PIC, PIE or
425
  /// non-PIC.  If this returns true, any PIC related flags should be ignored
426
  /// and instead the results of \c isPICDefault() and \c isPIEDefault() are
427
  /// used exclusively.
428
  virtual bool isPICDefaultForced() const = 0;
429
430
  /// SupportsProfiling - Does this tool chain support -pg.
431
16.1k
  virtual bool SupportsProfiling() const { return true; }
432
433
  /// Complain if this tool chain doesn't support Objective-C ARC.
434
0
  virtual void CheckObjCARC() const {}
435
436
  /// Get the default debug info format. Typically, this is DWARF.
437
2.51k
  virtual codegenoptions::DebugInfoFormat getDefaultDebugFormat() const {
438
2.51k
    return codegenoptions::DIF_DWARF;
439
2.51k
  }
440
441
  /// UseDwarfDebugFlags - Embed the compile options to clang into the Dwarf
442
  /// compile unit information.
443
8.96k
  virtual bool UseDwarfDebugFlags() const { return false; }
444
445
  // Return the DWARF version to emit, in the absence of arguments
446
  // to the contrary.
447
465
  virtual unsigned GetDefaultDwarfVersion() const { return 4; }
448
449
  // True if the driver should assume "-fstandalone-debug"
450
  // in the absence of an option specifying otherwise,
451
  // provided that debugging was requested in the first place.
452
  // i.e. a value of 'true' does not imply that debugging is wanted.
453
9.43k
  virtual bool GetDefaultStandaloneDebug() const { return false; }
454
455
  // Return the default debugger "tuning."
456
8.74k
  virtual llvm::DebuggerKind getDefaultDebuggerTuning() const {
457
8.74k
    return llvm::DebuggerKind::GDB;
458
8.74k
  }
459
460
  /// Does this toolchain supports given debug info option or not.
461
2.73k
  virtual bool supportsDebugInfoOption(const llvm::opt::Arg *) const {
462
2.73k
    return true;
463
2.73k
  }
464
465
  /// Adjust debug information kind considering all passed options.
466
  virtual void adjustDebugInfoKind(codegenoptions::DebugInfoKind &DebugInfoKind,
467
29.2k
                                   const llvm::opt::ArgList &Args) const {}
468
469
  /// GetExceptionModel - Return the tool chain exception model.
470
  virtual llvm::ExceptionHandling
471
  GetExceptionModel(const llvm::opt::ArgList &Args) const;
472
473
  /// SupportsEmbeddedBitcode - Does this tool chain support embedded bitcode.
474
0
  virtual bool SupportsEmbeddedBitcode() const { return false; }
475
476
  /// getThreadModel() - Which thread model does this target use?
477
36.4k
  virtual std::string getThreadModel() const { return "posix"; }
478
479
  /// isThreadModelSupported() - Does this target support a thread model?
480
  virtual bool isThreadModelSupported(const StringRef Model) const;
481
482
  /// ComputeLLVMTriple - Return the LLVM target triple to use, after taking
483
  /// command line arguments into account.
484
  virtual std::string
485
  ComputeLLVMTriple(const llvm::opt::ArgList &Args,
486
                    types::ID InputType = types::TY_INVALID) const;
487
488
  /// ComputeEffectiveClangTriple - Return the Clang triple to use for this
489
  /// target, which may take into account the command line arguments. For
490
  /// example, on Darwin the -mmacosx-version-min= command line argument (which
491
  /// sets the deployment target) determines the version in the triple passed to
492
  /// Clang.
493
  virtual std::string ComputeEffectiveClangTriple(
494
      const llvm::opt::ArgList &Args,
495
      types::ID InputType = types::TY_INVALID) const;
496
497
  /// getDefaultObjCRuntime - Return the default Objective-C runtime
498
  /// for this platform.
499
  ///
500
  /// FIXME: this really belongs on some sort of DeploymentTarget abstraction
501
  virtual ObjCRuntime getDefaultObjCRuntime(bool isNonFragile) const;
502
503
  /// hasBlocksRuntime - Given that the user is compiling with
504
  /// -fblocks, does this tool chain guarantee the existence of a
505
  /// blocks runtime?
506
  ///
507
  /// FIXME: this really belongs on some sort of DeploymentTarget abstraction
508
866
  virtual bool hasBlocksRuntime() const { return true; }
509
510
  /// Add the clang cc1 arguments for system include paths.
511
  ///
512
  /// This routine is responsible for adding the necessary cc1 arguments to
513
  /// include headers from standard system header directories.
514
  virtual void
515
  AddClangSystemIncludeArgs(const llvm::opt::ArgList &DriverArgs,
516
                            llvm::opt::ArgStringList &CC1Args) const;
517
518
  /// Add options that need to be passed to cc1 for this target.
519
  virtual void addClangTargetOptions(const llvm::opt::ArgList &DriverArgs,
520
                                     llvm::opt::ArgStringList &CC1Args,
521
                                     Action::OffloadKind DeviceOffloadKind) const;
522
523
  /// Add warning options that need to be passed to cc1 for this target.
524
  virtual void addClangWarningOptions(llvm::opt::ArgStringList &CC1Args) const;
525
526
  // GetRuntimeLibType - Determine the runtime library type to use with the
527
  // given compilation arguments.
528
  virtual RuntimeLibType
529
  GetRuntimeLibType(const llvm::opt::ArgList &Args) const;
530
531
  // GetCXXStdlibType - Determine the C++ standard library type to use with the
532
  // given compilation arguments.
533
  virtual CXXStdlibType GetCXXStdlibType(const llvm::opt::ArgList &Args) const;
534
535
  // GetUnwindLibType - Determine the unwind library type to use with the
536
  // given compilation arguments.
537
  virtual UnwindLibType GetUnwindLibType(const llvm::opt::ArgList &Args) const;
538
539
  /// AddClangCXXStdlibIncludeArgs - Add the clang -cc1 level arguments to set
540
  /// the include paths to use for the given C++ standard library type.
541
  virtual void
542
  AddClangCXXStdlibIncludeArgs(const llvm::opt::ArgList &DriverArgs,
543
                               llvm::opt::ArgStringList &CC1Args) const;
544
545
  /// Returns if the C++ standard library should be linked in.
546
  /// Note that e.g. -lm should still be linked even if this returns false.
547
  bool ShouldLinkCXXStdlib(const llvm::opt::ArgList &Args) const;
548
549
  /// AddCXXStdlibLibArgs - Add the system specific linker arguments to use
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  /// for the given C++ standard library type.
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  virtual void AddCXXStdlibLibArgs(const llvm::opt::ArgList &Args,
552
                                   llvm::opt::ArgStringList &CmdArgs) const;
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  /// AddFilePathLibArgs - Add each thing in getFilePaths() as a "-L" option.
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  void AddFilePathLibArgs(const llvm::opt::ArgList &Args,
556
                          llvm::opt::ArgStringList &CmdArgs) const;
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  /// AddCCKextLibArgs - Add the system specific linker arguments to use
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  /// for kernel extensions (Darwin-specific).
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  virtual void AddCCKextLibArgs(const llvm::opt::ArgList &Args,
561
                                llvm::opt::ArgStringList &CmdArgs) const;
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  /// AddFastMathRuntimeIfAvailable - If a runtime library exists that sets
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  /// global flags for unsafe floating point math, add it and return true.
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  ///
566
  /// This checks for presence of the -Ofast, -ffast-math or -funsafe-math flags.
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  virtual bool AddFastMathRuntimeIfAvailable(
568
      const llvm::opt::ArgList &Args, llvm::opt::ArgStringList &CmdArgs) const;
569
570
  /// addProfileRTLibs - When -fprofile-instr-profile is specified, try to pass
571
  /// a suitable profile runtime library to the linker.
572
  virtual void addProfileRTLibs(const llvm::opt::ArgList &Args,
573
                                llvm::opt::ArgStringList &CmdArgs) const;
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  /// Add arguments to use system-specific CUDA includes.
576
  virtual void AddCudaIncludeArgs(const llvm::opt::ArgList &DriverArgs,
577
                                  llvm::opt::ArgStringList &CC1Args) const;
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579
  /// Add arguments to use MCU GCC toolchain includes.
580
  virtual void AddIAMCUIncludeArgs(const llvm::opt::ArgList &DriverArgs,
581
                                   llvm::opt::ArgStringList &CC1Args) const;
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  /// On Windows, returns the MSVC compatibility version.
584
  virtual VersionTuple computeMSVCVersion(const Driver *D,
585
                                          const llvm::opt::ArgList &Args) const;
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  /// Return sanitizers which are available in this toolchain.
588
  virtual SanitizerMask getSupportedSanitizers() const;
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  /// Return sanitizers which are enabled by default.
591
30.9k
  virtual SanitizerMask getDefaultSanitizers() const {
592
30.9k
    return SanitizerMask();
593
30.9k
  }
594
};
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/// Set a ToolChain's effective triple. Reset it when the registration object
597
/// is destroyed.
598
class RegisterEffectiveTriple {
599
  const ToolChain &TC;
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public:
602
37.7k
  RegisterEffectiveTriple(const ToolChain &TC, llvm::Triple T) : TC(TC) {
603
37.7k
    TC.setEffectiveTriple(std::move(T));
604
37.7k
  }
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37.7k
  ~RegisterEffectiveTriple() { TC.setEffectiveTriple(llvm::Triple()); }
607
};
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} // namespace driver
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} // namespace clang
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#endif // LLVM_CLANG_DRIVER_TOOLCHAIN_H