Merge "Update prebuilt Clang to r353983." into p9.0HEADp9.0-backupp9.0

1 files changed, 233 insertions, 0 deletions

diff --git a/clang-r353983/include/clang/Frontend/Utils.h b/clang-r353983/include/clang/Frontend/Utils.h
new file mode 100644
index 00000000..124d4a99
--- /dev/null
+++ b/clang-r353983/include/clang/Frontend/Utils.h
@@ -0,0 +1,233 @@
+//===- Utils.h - Misc utilities for the front-end ---------------*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+//  This header contains miscellaneous utilities for various front-end actions.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_CLANG_FRONTEND_UTILS_H
+#define LLVM_CLANG_FRONTEND_UTILS_H
+
+#include "clang/Basic/Diagnostic.h"
+#include "clang/Basic/LLVM.h"
+#include "llvm/ADT/ArrayRef.h"
+#include "llvm/ADT/IntrusiveRefCntPtr.h"
+#include "llvm/ADT/StringMap.h"
+#include "llvm/ADT/StringRef.h"
+#include "llvm/ADT/StringSet.h"
+#include "llvm/Option/OptSpecifier.h"
+#include "llvm/Support/VirtualFileSystem.h"
+#include <cstdint>
+#include <memory>
+#include <string>
+#include <system_error>
+#include <utility>
+#include <vector>
+
+namespace llvm {
+
+class Triple;
+
+namespace opt {
+
+class ArgList;
+
+} // namespace opt
+
+} // namespace llvm
+
+namespace clang {
+
+class ASTReader;
+class CompilerInstance;
+class CompilerInvocation;
+class DependencyOutputOptions;
+class DiagnosticsEngine;
+class ExternalSemaSource;
+class FrontendOptions;
+class HeaderSearch;
+class HeaderSearchOptions;
+class LangOptions;
+class PCHContainerReader;
+class Preprocessor;
+class PreprocessorOptions;
+class PreprocessorOutputOptions;
+
+/// Apply the header search options to get given HeaderSearch object.
+void ApplyHeaderSearchOptions(HeaderSearch &HS,
+                              const HeaderSearchOptions &HSOpts,
+                              const LangOptions &Lang,
+                              const llvm::Triple &triple);
+
+/// InitializePreprocessor - Initialize the preprocessor getting it and the
+/// environment ready to process a single file.
+void InitializePreprocessor(Preprocessor &PP, const PreprocessorOptions &PPOpts,
+                            const PCHContainerReader &PCHContainerRdr,
+                            const FrontendOptions &FEOpts);
+
+/// DoPrintPreprocessedInput - Implement -E mode.
+void DoPrintPreprocessedInput(Preprocessor &PP, raw_ostream *OS,
+                              const PreprocessorOutputOptions &Opts);
+
+/// An interface for collecting the dependencies of a compilation. Users should
+/// use \c attachToPreprocessor and \c attachToASTReader to get all of the
+/// dependencies.
+/// FIXME: Migrate DependencyFileGen and DependencyGraphGen to use this
+/// interface.
+class DependencyCollector {
+public:
+  virtual ~DependencyCollector();
+
+  virtual void attachToPreprocessor(Preprocessor &PP);
+  virtual void attachToASTReader(ASTReader &R);
+  ArrayRef<std::string> getDependencies() const { return Dependencies; }
+
+  /// Called when a new file is seen. Return true if \p Filename should be added
+  /// to the list of dependencies.
+  ///
+  /// The default implementation ignores <built-in> and system files.
+  virtual bool sawDependency(StringRef Filename, bool FromModule,
+                             bool IsSystem, bool IsModuleFile, bool IsMissing);
+
+  /// Called when the end of the main file is reached.
+  virtual void finishedMainFile() {}
+
+  /// Return true if system files should be passed to sawDependency().
+  virtual bool needSystemDependencies() { return false; }
+
+  // implementation detail
+  /// Add a dependency \p Filename if it has not been seen before and
+  /// sawDependency() returns true.
+  void maybeAddDependency(StringRef Filename, bool FromModule, bool IsSystem,
+                          bool IsModuleFile, bool IsMissing);
+
+private:
+  llvm::StringSet<> Seen;
+  std::vector<std::string> Dependencies;
+};
+
+/// Builds a depdenency file when attached to a Preprocessor (for includes) and
+/// ASTReader (for module imports), and writes it out at the end of processing
+/// a source file.  Users should attach to the ast reader whenever a module is
+/// loaded.
+class DependencyFileGenerator {
+  void *Impl; // Opaque implementation
+
+  DependencyFileGenerator(void *Impl);
+
+public:
+  static DependencyFileGenerator *CreateAndAttachToPreprocessor(
+    Preprocessor &PP, const DependencyOutputOptions &Opts);
+
+  void AttachToASTReader(ASTReader &R);
+};
+
+/// Collects the dependencies for imported modules into a directory.  Users
+/// should attach to the AST reader whenever a module is loaded.
+class ModuleDependencyCollector : public DependencyCollector {
+  std::string DestDir;
+  bool HasErrors = false;
+  llvm::StringSet<> Seen;
+  llvm::vfs::YAMLVFSWriter VFSWriter;
+  llvm::StringMap<std::string> SymLinkMap;
+
+  bool getRealPath(StringRef SrcPath, SmallVectorImpl<char> &Result);
+  std::error_code copyToRoot(StringRef Src, StringRef Dst = {});
+
+public:
+  ModuleDependencyCollector(std::string DestDir)
+      : DestDir(std::move(DestDir)) {}
+  ~ModuleDependencyCollector() override { writeFileMap(); }
+
+  StringRef getDest() { return DestDir; }
+  virtual bool insertSeen(StringRef Filename) { return Seen.insert(Filename).second; }
+  virtual void addFile(StringRef Filename, StringRef FileDst = {});
+
+  virtual void addFileMapping(StringRef VPath, StringRef RPath) {
+    VFSWriter.addFileMapping(VPath, RPath);
+  }
+
+  void attachToPreprocessor(Preprocessor &PP) override;
+  void attachToASTReader(ASTReader &R) override;
+
+  virtual void writeFileMap();
+  virtual bool hasErrors() { return HasErrors; }
+};
+
+/// AttachDependencyGraphGen - Create a dependency graph generator, and attach
+/// it to the given preprocessor.
+void AttachDependencyGraphGen(Preprocessor &PP, StringRef OutputFile,
+                              StringRef SysRoot);
+
+/// AttachHeaderIncludeGen - Create a header include list generator, and attach
+/// it to the given preprocessor.
+///
+/// \param DepOpts - Options controlling the output.
+/// \param ShowAllHeaders - If true, show all header information instead of just
+/// headers following the predefines buffer. This is useful for making sure
+/// includes mentioned on the command line are also reported, but differs from
+/// the default behavior used by -H.
+/// \param OutputPath - If non-empty, a path to write the header include
+/// information to, instead of writing to stderr.
+/// \param ShowDepth - Whether to indent to show the nesting of the includes.
+/// \param MSStyle - Whether to print in cl.exe /showIncludes style.
+void AttachHeaderIncludeGen(Preprocessor &PP,
+                            const DependencyOutputOptions &DepOpts,
+                            bool ShowAllHeaders = false,
+                            StringRef OutputPath = {},
+                            bool ShowDepth = true, bool MSStyle = false);
+
+/// The ChainedIncludesSource class converts headers to chained PCHs in
+/// memory, mainly for testing.
+IntrusiveRefCntPtr<ExternalSemaSource>
+createChainedIncludesSource(CompilerInstance &CI,
+                            IntrusiveRefCntPtr<ExternalSemaSource> &Reader);
+
+/// createInvocationFromCommandLine - Construct a compiler invocation object for
+/// a command line argument vector.
+///
+/// \return A CompilerInvocation, or 0 if none was built for the given
+/// argument vector.
+std::unique_ptr<CompilerInvocation> createInvocationFromCommandLine(
+    ArrayRef<const char *> Args,
+    IntrusiveRefCntPtr<DiagnosticsEngine> Diags =
+        IntrusiveRefCntPtr<DiagnosticsEngine>(),
+    IntrusiveRefCntPtr<llvm::vfs::FileSystem> VFS = nullptr);
+
+/// Return the value of the last argument as an integer, or a default. If Diags
+/// is non-null, emits an error if the argument is given, but non-integral.
+int getLastArgIntValue(const llvm::opt::ArgList &Args,
+                       llvm::opt::OptSpecifier Id, int Default,
+                       DiagnosticsEngine *Diags = nullptr);
+
+inline int getLastArgIntValue(const llvm::opt::ArgList &Args,
+                              llvm::opt::OptSpecifier Id, int Default,
+                              DiagnosticsEngine &Diags) {
+  return getLastArgIntValue(Args, Id, Default, &Diags);
+}
+
+uint64_t getLastArgUInt64Value(const llvm::opt::ArgList &Args,
+                               llvm::opt::OptSpecifier Id, uint64_t Default,
+                               DiagnosticsEngine *Diags = nullptr);
+
+inline uint64_t getLastArgUInt64Value(const llvm::opt::ArgList &Args,
+                                      llvm::opt::OptSpecifier Id,
+                                      uint64_t Default,
+                                      DiagnosticsEngine &Diags) {
+  return getLastArgUInt64Value(Args, Id, Default, &Diags);
+}
+
+// Frontend timing utils
+
+/// If the user specifies the -ftime-report argument on an Clang command line
+/// then the value of this boolean will be true, otherwise false.
+extern bool FrontendTimesIsEnabled;
+
+} // namespace clang
+
+#endif // LLVM_CLANG_FRONTEND_UTILS_H