1 files changed, 707 insertions, 0 deletions
diff --git a/contrib/llvm/tools/clang/lib/Frontend/FrontendActions.cpp b/contrib/llvm/tools/clang/lib/Frontend/FrontendActions.cpp
new file mode 100644
index 0000000..701ef02
--- /dev/null
+++ b/contrib/llvm/tools/clang/lib/Frontend/FrontendActions.cpp
@@ -0,0 +1,707 @@
+//===--- FrontendActions.cpp ----------------------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "clang/Frontend/FrontendActions.h"
+#include "clang/AST/ASTConsumer.h"
+#include "clang/Basic/FileManager.h"
+#include "clang/Frontend/ASTConsumers.h"
+#include "clang/Frontend/ASTUnit.h"
+#include "clang/Frontend/CompilerInstance.h"
+#include "clang/Frontend/FrontendDiagnostic.h"
+#include "clang/Frontend/Utils.h"
+#include "clang/Lex/HeaderSearch.h"
+#include "clang/Lex/Pragma.h"
+#include "clang/Lex/Preprocessor.h"
+#include "clang/Parse/Parser.h"
+#include "clang/Serialization/ASTReader.h"
+#include "clang/Serialization/ASTWriter.h"
+#include "llvm/Support/FileSystem.h"
+#include "llvm/Support/MemoryBuffer.h"
+#include "llvm/Support/raw_ostream.h"
+#include <memory>
+#include <system_error>
+
+using namespace clang;
+
+//===----------------------------------------------------------------------===//
+// Custom Actions
+//===----------------------------------------------------------------------===//
+
+std::unique_ptr<ASTConsumer>
+InitOnlyAction::CreateASTConsumer(CompilerInstance &CI, StringRef InFile) {
+  return llvm::make_unique<ASTConsumer>();
+}
+
+void InitOnlyAction::ExecuteAction() {
+}
+
+//===----------------------------------------------------------------------===//
+// AST Consumer Actions
+//===----------------------------------------------------------------------===//
+
+std::unique_ptr<ASTConsumer>
+ASTPrintAction::CreateASTConsumer(CompilerInstance &CI, StringRef InFile) {
+  if (raw_ostream *OS = CI.createDefaultOutputFile(false, InFile))
+    return CreateASTPrinter(OS, CI.getFrontendOpts().ASTDumpFilter);
+  return nullptr;
+}
+
+std::unique_ptr<ASTConsumer>
+ASTDumpAction::CreateASTConsumer(CompilerInstance &CI, StringRef InFile) {
+  return CreateASTDumper(CI.getFrontendOpts().ASTDumpFilter,
+                         CI.getFrontendOpts().ASTDumpDecls,
+                         CI.getFrontendOpts().ASTDumpLookups);
+}
+
+std::unique_ptr<ASTConsumer>
+ASTDeclListAction::CreateASTConsumer(CompilerInstance &CI, StringRef InFile) {
+  return CreateASTDeclNodeLister();
+}
+
+std::unique_ptr<ASTConsumer>
+ASTViewAction::CreateASTConsumer(CompilerInstance &CI, StringRef InFile) {
+  return CreateASTViewer();
+}
+
+std::unique_ptr<ASTConsumer>
+DeclContextPrintAction::CreateASTConsumer(CompilerInstance &CI,
+                                          StringRef InFile) {
+  return CreateDeclContextPrinter();
+}
+
+std::unique_ptr<ASTConsumer>
+GeneratePCHAction::CreateASTConsumer(CompilerInstance &CI, StringRef InFile) {
+  std::string Sysroot;
+  std::string OutputFile;
+  raw_ostream *OS = nullptr;
+  if (ComputeASTConsumerArguments(CI, InFile, Sysroot, OutputFile, OS))
+    return nullptr;
+
+  if (!CI.getFrontendOpts().RelocatablePCH)
+    Sysroot.clear();
+  return llvm::make_unique<PCHGenerator>(CI.getPreprocessor(), OutputFile,
+                                         nullptr, Sysroot, OS);
+}
+
+bool GeneratePCHAction::ComputeASTConsumerArguments(CompilerInstance &CI,
+                                                    StringRef InFile,
+                                                    std::string &Sysroot,
+                                                    std::string &OutputFile,
+                                                    raw_ostream *&OS) {
+  Sysroot = CI.getHeaderSearchOpts().Sysroot;
+  if (CI.getFrontendOpts().RelocatablePCH && Sysroot.empty()) {
+    CI.getDiagnostics().Report(diag::err_relocatable_without_isysroot);
+    return true;
+  }
+
+  // We use createOutputFile here because this is exposed via libclang, and we
+  // must disable the RemoveFileOnSignal behavior.
+  // We use a temporary to avoid race conditions.
+  OS = CI.createOutputFile(CI.getFrontendOpts().OutputFile, /*Binary=*/true,
+                           /*RemoveFileOnSignal=*/false, InFile,
+                           /*Extension=*/"", /*useTemporary=*/true);
+  if (!OS)
+    return true;
+
+  OutputFile = CI.getFrontendOpts().OutputFile;
+  return false;
+}
+
+std::unique_ptr<ASTConsumer>
+GenerateModuleAction::CreateASTConsumer(CompilerInstance &CI,
+                                        StringRef InFile) {
+  std::string Sysroot;
+  std::string OutputFile;
+  raw_ostream *OS = nullptr;
+  if (ComputeASTConsumerArguments(CI, InFile, Sysroot, OutputFile, OS))
+    return nullptr;
+
+  return llvm::make_unique<PCHGenerator>(CI.getPreprocessor(), OutputFile,
+                                         Module, Sysroot, OS);
+}
+
+static SmallVectorImpl<char> &
+operator+=(SmallVectorImpl<char> &Includes, StringRef RHS) {
+  Includes.append(RHS.begin(), RHS.end());
+  return Includes;
+}
+
+static std::error_code addHeaderInclude(StringRef HeaderName,
+                                        SmallVectorImpl<char> &Includes,
+                                        const LangOptions &LangOpts,
+                                        bool IsExternC) {
+  if (IsExternC && LangOpts.CPlusPlus)
+    Includes += "extern \"C\" {\n";
+  if (LangOpts.ObjC1)
+    Includes += "#import \"";
+  else
+    Includes += "#include \"";
+
+  Includes += HeaderName;
+
+  Includes += "\"\n";
+  if (IsExternC && LangOpts.CPlusPlus)
+    Includes += "}\n";
+  return std::error_code();
+}
+
+static std::error_code addHeaderInclude(const FileEntry *Header,
+                                        SmallVectorImpl<char> &Includes,
+                                        const LangOptions &LangOpts,
+                                        bool IsExternC) {
+  // Use an absolute path if we don't have a filename as written in the module
+  // map file; this ensures that we will identify the right file independent of
+  // header search paths.
+  if (llvm::sys::path::is_absolute(Header->getName()))
+    return addHeaderInclude(Header->getName(), Includes, LangOpts, IsExternC);
+
+  SmallString<256> AbsName(Header->getName());
+  if (std::error_code Err = llvm::sys::fs::make_absolute(AbsName))
+    return Err;
+  return addHeaderInclude(AbsName, Includes, LangOpts, IsExternC);
+}
+
+/// \brief Collect the set of header includes needed to construct the given 
+/// module and update the TopHeaders file set of the module.
+///
+/// \param Module The module we're collecting includes from.
+///
+/// \param Includes Will be augmented with the set of \#includes or \#imports
+/// needed to load all of the named headers.
+static std::error_code
+collectModuleHeaderIncludes(const LangOptions &LangOpts, FileManager &FileMgr,
+                            ModuleMap &ModMap, clang::Module *Module,
+                            SmallVectorImpl<char> &Includes) {
+  // Don't collect any headers for unavailable modules.
+  if (!Module->isAvailable())
+    return std::error_code();
+
+  // Add includes for each of these headers.
+  for (Module::Header &H : Module->Headers[Module::HK_Normal]) {
+    Module->addTopHeader(H.Entry);
+    // Use the path as specified in the module map file. We'll look for this
+    // file relative to the module build directory (the directory containing
+    // the module map file) so this will find the same file that we found
+    // while parsing the module map.
+    if (std::error_code Err = addHeaderInclude(H.NameAsWritten, Includes,
+                                               LangOpts, Module->IsExternC))
+      return Err;
+  }
+  // Note that Module->PrivateHeaders will not be a TopHeader.
+
+  if (const FileEntry *UmbrellaHeader = Module->getUmbrellaHeader()) {
+    // FIXME: Track the name as written here.
+    Module->addTopHeader(UmbrellaHeader);
+    if (Module->Parent) {
+      // Include the umbrella header for submodules.
+      if (std::error_code Err = addHeaderInclude(UmbrellaHeader, Includes,
+                                                 LangOpts, Module->IsExternC))
+        return Err;
+    }
+  } else if (const DirectoryEntry *UmbrellaDir = Module->getUmbrellaDir()) {
+    // Add all of the headers we find in this subdirectory.
+    std::error_code EC;
+    SmallString<128> DirNative;
+    llvm::sys::path::native(UmbrellaDir->getName(), DirNative);
+    for (llvm::sys::fs::recursive_directory_iterator Dir(DirNative.str(), EC), 
+                                                     DirEnd;
+         Dir != DirEnd && !EC; Dir.increment(EC)) {
+      // Check whether this entry has an extension typically associated with 
+      // headers.
+      if (!llvm::StringSwitch<bool>(llvm::sys::path::extension(Dir->path()))
+          .Cases(".h", ".H", ".hh", ".hpp", true)
+          .Default(false))
+        continue;
+
+      const FileEntry *Header = FileMgr.getFile(Dir->path());
+      // FIXME: This shouldn't happen unless there is a file system race. Is
+      // that worth diagnosing?
+      if (!Header)
+        continue;
+
+      // If this header is marked 'unavailable' in this module, don't include 
+      // it.
+      if (ModMap.isHeaderUnavailableInModule(Header, Module))
+        continue;
+
+      // Include this header as part of the umbrella directory.
+      // FIXME: Track the name as written through to here.
+      Module->addTopHeader(Header);
+      if (std::error_code Err =
+              addHeaderInclude(Header, Includes, LangOpts, Module->IsExternC))
+        return Err;
+    }
+
+    if (EC)
+      return EC;
+  }
+
+  // Recurse into submodules.
+  for (clang::Module::submodule_iterator Sub = Module->submodule_begin(),
+                                      SubEnd = Module->submodule_end();
+       Sub != SubEnd; ++Sub)
+    if (std::error_code Err = collectModuleHeaderIncludes(
+            LangOpts, FileMgr, ModMap, *Sub, Includes))
+      return Err;
+
+  return std::error_code();
+}
+
+bool GenerateModuleAction::BeginSourceFileAction(CompilerInstance &CI, 
+                                                 StringRef Filename) {
+  // Find the module map file.  
+  const FileEntry *ModuleMap = CI.getFileManager().getFile(Filename);
+  if (!ModuleMap)  {
+    CI.getDiagnostics().Report(diag::err_module_map_not_found)
+      << Filename;
+    return false;
+  }
+  
+  // Parse the module map file.
+  HeaderSearch &HS = CI.getPreprocessor().getHeaderSearchInfo();
+  if (HS.loadModuleMapFile(ModuleMap, IsSystem))
+    return false;
+  
+  if (CI.getLangOpts().CurrentModule.empty()) {
+    CI.getDiagnostics().Report(diag::err_missing_module_name);
+    
+    // FIXME: Eventually, we could consider asking whether there was just
+    // a single module described in the module map, and use that as a 
+    // default. Then it would be fairly trivial to just "compile" a module
+    // map with a single module (the common case).
+    return false;
+  }
+
+  // If we're being run from the command-line, the module build stack will not
+  // have been filled in yet, so complete it now in order to allow us to detect
+  // module cycles.
+  SourceManager &SourceMgr = CI.getSourceManager();
+  if (SourceMgr.getModuleBuildStack().empty())
+    SourceMgr.pushModuleBuildStack(CI.getLangOpts().CurrentModule,
+                                   FullSourceLoc(SourceLocation(), SourceMgr));
+
+  // Dig out the module definition.
+  Module = HS.lookupModule(CI.getLangOpts().CurrentModule, 
+                           /*AllowSearch=*/false);
+  if (!Module) {
+    CI.getDiagnostics().Report(diag::err_missing_module)
+      << CI.getLangOpts().CurrentModule << Filename;
+    
+    return false;
+  }
+
+  // Check whether we can build this module at all.
+  clang::Module::Requirement Requirement;
+  clang::Module::UnresolvedHeaderDirective MissingHeader;
+  if (!Module->isAvailable(CI.getLangOpts(), CI.getTarget(), Requirement,
+                           MissingHeader)) {
+    if (MissingHeader.FileNameLoc.isValid()) {
+      CI.getDiagnostics().Report(MissingHeader.FileNameLoc,
+                                 diag::err_module_header_missing)
+        << MissingHeader.IsUmbrella << MissingHeader.FileName;
+    } else {
+      CI.getDiagnostics().Report(diag::err_module_unavailable)
+        << Module->getFullModuleName()
+        << Requirement.second << Requirement.first;
+    }
+
+    return false;
+  }
+
+  if (ModuleMapForUniquing && ModuleMapForUniquing != ModuleMap) {
+    Module->IsInferred = true;
+    HS.getModuleMap().setInferredModuleAllowedBy(Module, ModuleMapForUniquing);
+  } else {
+    ModuleMapForUniquing = ModuleMap;
+  }
+
+  FileManager &FileMgr = CI.getFileManager();
+
+  // Collect the set of #includes we need to build the module.
+  SmallString<256> HeaderContents;
+  std::error_code Err = std::error_code();
+  if (const FileEntry *UmbrellaHeader = Module->getUmbrellaHeader())
+    // FIXME: Track the file name as written.
+    Err = addHeaderInclude(UmbrellaHeader, HeaderContents, CI.getLangOpts(),
+                           Module->IsExternC);
+  if (!Err)
+    Err = collectModuleHeaderIncludes(
+        CI.getLangOpts(), FileMgr,
+        CI.getPreprocessor().getHeaderSearchInfo().getModuleMap(), Module,
+        HeaderContents);
+
+  if (Err) {
+    CI.getDiagnostics().Report(diag::err_module_cannot_create_includes)
+      << Module->getFullModuleName() << Err.message();
+    return false;
+  }
+
+  // Inform the preprocessor that includes from within the input buffer should
+  // be resolved relative to the build directory of the module map file.
+  CI.getPreprocessor().setMainFileDir(Module->Directory);
+
+  std::unique_ptr<llvm::MemoryBuffer> InputBuffer =
+      llvm::MemoryBuffer::getMemBufferCopy(HeaderContents,
+                                           Module::getModuleInputBufferName());
+  // Ownership of InputBuffer will be transferred to the SourceManager.
+  setCurrentInput(FrontendInputFile(InputBuffer.release(), getCurrentFileKind(),
+                                    Module->IsSystem));
+  return true;
+}
+
+bool GenerateModuleAction::ComputeASTConsumerArguments(CompilerInstance &CI,
+                                                       StringRef InFile,
+                                                       std::string &Sysroot,
+                                                       std::string &OutputFile,
+                                                       raw_ostream *&OS) {
+  // If no output file was provided, figure out where this module would go
+  // in the module cache.
+  if (CI.getFrontendOpts().OutputFile.empty()) {
+    HeaderSearch &HS = CI.getPreprocessor().getHeaderSearchInfo();
+    CI.getFrontendOpts().OutputFile =
+        HS.getModuleFileName(CI.getLangOpts().CurrentModule,
+                             ModuleMapForUniquing->getName());
+  }
+  
+  // We use createOutputFile here because this is exposed via libclang, and we
+  // must disable the RemoveFileOnSignal behavior.
+  // We use a temporary to avoid race conditions.
+  OS = CI.createOutputFile(CI.getFrontendOpts().OutputFile, /*Binary=*/true,
+                           /*RemoveFileOnSignal=*/false, InFile,
+                           /*Extension=*/"", /*useTemporary=*/true,
+                           /*CreateMissingDirectories=*/true);
+  if (!OS)
+    return true;
+  
+  OutputFile = CI.getFrontendOpts().OutputFile;
+  return false;
+}
+
+std::unique_ptr<ASTConsumer>
+SyntaxOnlyAction::CreateASTConsumer(CompilerInstance &CI, StringRef InFile) {
+  return llvm::make_unique<ASTConsumer>();
+}
+
+std::unique_ptr<ASTConsumer>
+DumpModuleInfoAction::CreateASTConsumer(CompilerInstance &CI,
+                                        StringRef InFile) {
+  return llvm::make_unique<ASTConsumer>();
+}
+
+std::unique_ptr<ASTConsumer>
+VerifyPCHAction::CreateASTConsumer(CompilerInstance &CI, StringRef InFile) {
+  return llvm::make_unique<ASTConsumer>();
+}
+
+void VerifyPCHAction::ExecuteAction() {
+  CompilerInstance &CI = getCompilerInstance();
+  bool Preamble = CI.getPreprocessorOpts().PrecompiledPreambleBytes.first != 0;
+  const std::string &Sysroot = CI.getHeaderSearchOpts().Sysroot;
+  std::unique_ptr<ASTReader> Reader(
+      new ASTReader(CI.getPreprocessor(), CI.getASTContext(),
+                    Sysroot.empty() ? "" : Sysroot.c_str(),
+                    /*DisableValidation*/ false,
+                    /*AllowPCHWithCompilerErrors*/ false,
+                    /*AllowConfigurationMismatch*/ true,
+                    /*ValidateSystemInputs*/ true));
+
+  Reader->ReadAST(getCurrentFile(),
+                  Preamble ? serialization::MK_Preamble
+                           : serialization::MK_PCH,
+                  SourceLocation(),
+                  ASTReader::ARR_ConfigurationMismatch);
+}
+
+namespace {
+  /// \brief AST reader listener that dumps module information for a module
+  /// file.
+  class DumpModuleInfoListener : public ASTReaderListener {
+    llvm::raw_ostream &Out;
+
+  public:
+    DumpModuleInfoListener(llvm::raw_ostream &Out) : Out(Out) { }
+
+#define DUMP_BOOLEAN(Value, Text)                       \
+    Out.indent(4) << Text << ": " << (Value? "Yes" : "No") << "\n"
+
+    bool ReadFullVersionInformation(StringRef FullVersion) override {
+      Out.indent(2)
+        << "Generated by "
+        << (FullVersion == getClangFullRepositoryVersion()? "this"
+                                                          : "a different")
+        << " Clang: " << FullVersion << "\n";
+      return ASTReaderListener::ReadFullVersionInformation(FullVersion);
+    }
+
+    void ReadModuleName(StringRef ModuleName) override {
+      Out.indent(2) << "Module name: " << ModuleName << "\n";
+    }
+    void ReadModuleMapFile(StringRef ModuleMapPath) override {
+      Out.indent(2) << "Module map file: " << ModuleMapPath << "\n";
+    }
+
+    bool ReadLanguageOptions(const LangOptions &LangOpts, bool Complain,
+                             bool AllowCompatibleDifferences) override {
+      Out.indent(2) << "Language options:\n";
+#define LANGOPT(Name, Bits, Default, Description) \
+      DUMP_BOOLEAN(LangOpts.Name, Description);
+#define ENUM_LANGOPT(Name, Type, Bits, Default, Description) \
+      Out.indent(4) << Description << ": "                   \
+                    << static_cast<unsigned>(LangOpts.get##Name()) << "\n";
+#define VALUE_LANGOPT(Name, Bits, Default, Description) \
+      Out.indent(4) << Description << ": " << LangOpts.Name << "\n";
+#define BENIGN_LANGOPT(Name, Bits, Default, Description)
+#define BENIGN_ENUM_LANGOPT(Name, Type, Bits, Default, Description)
+#include "clang/Basic/LangOptions.def"
+      return false;
+    }
+
+    bool ReadTargetOptions(const TargetOptions &TargetOpts,
+                           bool Complain) override {
+      Out.indent(2) << "Target options:\n";
+      Out.indent(4) << "  Triple: " << TargetOpts.Triple << "\n";
+      Out.indent(4) << "  CPU: " << TargetOpts.CPU << "\n";
+      Out.indent(4) << "  ABI: " << TargetOpts.ABI << "\n";
+
+      if (!TargetOpts.FeaturesAsWritten.empty()) {
+        Out.indent(4) << "Target features:\n";
+        for (unsigned I = 0, N = TargetOpts.FeaturesAsWritten.size();
+             I != N; ++I) {
+          Out.indent(6) << TargetOpts.FeaturesAsWritten[I] << "\n";
+        }
+      }
+
+      return false;
+    }
+
+    virtual bool
+    ReadDiagnosticOptions(IntrusiveRefCntPtr<DiagnosticOptions> DiagOpts,
+                          bool Complain) override {
+      Out.indent(2) << "Diagnostic options:\n";
+#define DIAGOPT(Name, Bits, Default) DUMP_BOOLEAN(DiagOpts->Name, #Name);
+#define ENUM_DIAGOPT(Name, Type, Bits, Default) \
+      Out.indent(4) << #Name << ": " << DiagOpts->get##Name() << "\n";
+#define VALUE_DIAGOPT(Name, Bits, Default) \
+      Out.indent(4) << #Name << ": " << DiagOpts->Name << "\n";
+#include "clang/Basic/DiagnosticOptions.def"
+
+      Out.indent(4) << "Diagnostic flags:\n";
+      for (const std::string &Warning : DiagOpts->Warnings)
+        Out.indent(6) << "-W" << Warning << "\n";
+      for (const std::string &Remark : DiagOpts->Remarks)
+        Out.indent(6) << "-R" << Remark << "\n";
+
+      return false;
+    }
+
+    bool ReadHeaderSearchOptions(const HeaderSearchOptions &HSOpts,
+                                 bool Complain) override {
+      Out.indent(2) << "Header search options:\n";
+      Out.indent(4) << "System root [-isysroot=]: '" << HSOpts.Sysroot << "'\n";
+      DUMP_BOOLEAN(HSOpts.UseBuiltinIncludes,
+                   "Use builtin include directories [-nobuiltininc]");
+      DUMP_BOOLEAN(HSOpts.UseStandardSystemIncludes,
+                   "Use standard system include directories [-nostdinc]");
+      DUMP_BOOLEAN(HSOpts.UseStandardCXXIncludes,
+                   "Use standard C++ include directories [-nostdinc++]");
+      DUMP_BOOLEAN(HSOpts.UseLibcxx,
+                   "Use libc++ (rather than libstdc++) [-stdlib=]");
+      return false;
+    }
+
+    bool ReadPreprocessorOptions(const PreprocessorOptions &PPOpts,
+                                 bool Complain,
+                                 std::string &SuggestedPredefines) override {
+      Out.indent(2) << "Preprocessor options:\n";
+      DUMP_BOOLEAN(PPOpts.UsePredefines,
+                   "Uses compiler/target-specific predefines [-undef]");
+      DUMP_BOOLEAN(PPOpts.DetailedRecord,
+                   "Uses detailed preprocessing record (for indexing)");
+
+      if (!PPOpts.Macros.empty()) {
+        Out.indent(4) << "Predefined macros:\n";
+      }
+
+      for (std::vector<std::pair<std::string, bool/*isUndef*/> >::const_iterator
+             I = PPOpts.Macros.begin(), IEnd = PPOpts.Macros.end();
+           I != IEnd; ++I) {
+        Out.indent(6);
+        if (I->second)
+          Out << "-U";
+        else
+          Out << "-D";
+        Out << I->first << "\n";
+      }
+      return false;
+    }
+#undef DUMP_BOOLEAN
+  };
+}
+
+void DumpModuleInfoAction::ExecuteAction() {
+  // Set up the output file.
+  std::unique_ptr<llvm::raw_fd_ostream> OutFile;
+  StringRef OutputFileName = getCompilerInstance().getFrontendOpts().OutputFile;
+  if (!OutputFileName.empty() && OutputFileName != "-") {
+    std::error_code EC;
+    OutFile.reset(new llvm::raw_fd_ostream(OutputFileName.str(), EC,
+                                           llvm::sys::fs::F_Text));
+  }
+  llvm::raw_ostream &Out = OutFile.get()? *OutFile.get() : llvm::outs();
+
+  Out << "Information for module file '" << getCurrentFile() << "':\n";
+  DumpModuleInfoListener Listener(Out);
+  ASTReader::readASTFileControlBlock(getCurrentFile(),
+                                     getCompilerInstance().getFileManager(),
+                                     Listener);
+}
+
+//===----------------------------------------------------------------------===//
+// Preprocessor Actions
+//===----------------------------------------------------------------------===//
+
+void DumpRawTokensAction::ExecuteAction() {
+  Preprocessor &PP = getCompilerInstance().getPreprocessor();
+  SourceManager &SM = PP.getSourceManager();
+
+  // Start lexing the specified input file.
+  const llvm::MemoryBuffer *FromFile = SM.getBuffer(SM.getMainFileID());
+  Lexer RawLex(SM.getMainFileID(), FromFile, SM, PP.getLangOpts());
+  RawLex.SetKeepWhitespaceMode(true);
+
+  Token RawTok;
+  RawLex.LexFromRawLexer(RawTok);
+  while (RawTok.isNot(tok::eof)) {
+    PP.DumpToken(RawTok, true);
+    llvm::errs() << "\n";
+    RawLex.LexFromRawLexer(RawTok);
+  }
+}
+
+void DumpTokensAction::ExecuteAction() {
+  Preprocessor &PP = getCompilerInstance().getPreprocessor();
+  // Start preprocessing the specified input file.
+  Token Tok;
+  PP.EnterMainSourceFile();
+  do {
+    PP.Lex(Tok);
+    PP.DumpToken(Tok, true);
+    llvm::errs() << "\n";
+  } while (Tok.isNot(tok::eof));
+}
+
+void GeneratePTHAction::ExecuteAction() {
+  CompilerInstance &CI = getCompilerInstance();
+  if (CI.getFrontendOpts().OutputFile.empty() ||
+      CI.getFrontendOpts().OutputFile == "-") {
+    // FIXME: Don't fail this way.
+    // FIXME: Verify that we can actually seek in the given file.
+    llvm::report_fatal_error("PTH requires a seekable file for output!");
+  }
+  llvm::raw_fd_ostream *OS =
+    CI.createDefaultOutputFile(true, getCurrentFile());
+  if (!OS) return;
+
+  CacheTokens(CI.getPreprocessor(), OS);
+}
+
+void PreprocessOnlyAction::ExecuteAction() {
+  Preprocessor &PP = getCompilerInstance().getPreprocessor();
+
+  // Ignore unknown pragmas.
+  PP.IgnorePragmas();
+
+  Token Tok;
+  // Start parsing the specified input file.
+  PP.EnterMainSourceFile();
+  do {
+    PP.Lex(Tok);
+  } while (Tok.isNot(tok::eof));
+}
+
+void PrintPreprocessedAction::ExecuteAction() {
+  CompilerInstance &CI = getCompilerInstance();
+  // Output file may need to be set to 'Binary', to avoid converting Unix style
+  // line feeds (<LF>) to Microsoft style line feeds (<CR><LF>).
+  //
+  // Look to see what type of line endings the file uses. If there's a
+  // CRLF, then we won't open the file up in binary mode. If there is
+  // just an LF or CR, then we will open the file up in binary mode.
+  // In this fashion, the output format should match the input format, unless
+  // the input format has inconsistent line endings.
+  //
+  // This should be a relatively fast operation since most files won't have
+  // all of their source code on a single line. However, that is still a 
+  // concern, so if we scan for too long, we'll just assume the file should
+  // be opened in binary mode.
+  bool BinaryMode = true;
+  bool InvalidFile = false;
+  const SourceManager& SM = CI.getSourceManager();
+  const llvm::MemoryBuffer *Buffer = SM.getBuffer(SM.getMainFileID(), 
+                                                     &InvalidFile);
+  if (!InvalidFile) {
+    const char *cur = Buffer->getBufferStart();
+    const char *end = Buffer->getBufferEnd();
+    const char *next = (cur != end) ? cur + 1 : end;
+
+    // Limit ourselves to only scanning 256 characters into the source
+    // file.  This is mostly a sanity check in case the file has no 
+    // newlines whatsoever.
+    if (end - cur > 256) end = cur + 256;
+	  
+    while (next < end) {
+      if (*cur == 0x0D) {  // CR
+        if (*next == 0x0A)  // CRLF
+          BinaryMode = false;
+
+        break;
+      } else if (*cur == 0x0A)  // LF
+        break;
+
+      ++cur, ++next;
+    }
+  }
+
+  raw_ostream *OS = CI.createDefaultOutputFile(BinaryMode, getCurrentFile());
+  if (!OS) return;
+
+  DoPrintPreprocessedInput(CI.getPreprocessor(), OS,
+                           CI.getPreprocessorOutputOpts());
+}
+
+void PrintPreambleAction::ExecuteAction() {
+  switch (getCurrentFileKind()) {
+  case IK_C:
+  case IK_CXX:
+  case IK_ObjC:
+  case IK_ObjCXX:
+  case IK_OpenCL:
+  case IK_CUDA:
+    break;
+      
+  case IK_None:
+  case IK_Asm:
+  case IK_PreprocessedC:
+  case IK_PreprocessedCXX:
+  case IK_PreprocessedObjC:
+  case IK_PreprocessedObjCXX:
+  case IK_AST:
+  case IK_LLVM_IR:
+    // We can't do anything with these.
+    return;
+  }
+
+  CompilerInstance &CI = getCompilerInstance();
+  auto Buffer = CI.getFileManager().getBufferForFile(getCurrentFile());
+  if (Buffer) {
+    unsigned Preamble =
+        Lexer::ComputePreamble((*Buffer)->getBuffer(), CI.getLangOpts()).first;
+    llvm::outs().write((*Buffer)->getBufferStart(), Preamble);
+  }
+}