4 files changed, 23 insertions, 2 deletions
diff --git a/include/clang/Frontend/ASTConsumers.h b/include/clang/Frontend/ASTConsumers.h
index 04365d7c78d8..be4520262558 100644
--- a/include/clang/Frontend/ASTConsumers.h
+++ b/include/clang/Frontend/ASTConsumers.h
@@ -20,6 +20,7 @@
 
 namespace llvm {
   class Module;
+  class LLVMContext;
   namespace sys { class Path; }
 }
 namespace clang {
@@ -79,7 +80,8 @@ ASTConsumer *CreateBackendConsumer(BackendAction Action,
                                    const LangOptions &Features,
                                    const CompileOptions &CompileOpts,
                                    const std::string &ModuleID,
-                                   llvm::raw_ostream *OS);
+                                   llvm::raw_ostream *OS,
+                                   llvm::LLVMContext& C);
 
 // HTML printer: uses the rewriter to convert source code to HTML with
 // syntax highlighting suitable for viewing in a web-browser.
diff --git a/include/clang/Frontend/PCHBitCodes.h b/include/clang/Frontend/PCHBitCodes.h
index 63222725d529..80aa248a78e6 100644
--- a/include/clang/Frontend/PCHBitCodes.h
+++ b/include/clang/Frontend/PCHBitCodes.h
@@ -218,7 +218,11 @@ namespace clang {
 
       /// \brief Record code for the original file that was used to
       /// generate the precompiled header.
-      ORIGINAL_FILE_NAME = 20
+      ORIGINAL_FILE_NAME = 20,
+      
+      /// \brief Record code for the sorted array of source ranges where
+      /// comments were encountered in the source code.
+      COMMENT_RANGES = 21
     };
 
     /// \brief Record types used within a source manager block.
diff --git a/include/clang/Frontend/PCHReader.h b/include/clang/Frontend/PCHReader.h
index b3ed36434312..8291f4697a8e 100644
--- a/include/clang/Frontend/PCHReader.h
+++ b/include/clang/Frontend/PCHReader.h
@@ -279,6 +279,12 @@ private:
   /// been loaded.
   llvm::SmallVector<Selector, 16> SelectorsLoaded;
 
+  /// \brief A sorted array of source ranges containing comments.
+  SourceRange *Comments;
+      
+  /// \brief The number of source ranges in the Comments array.
+  unsigned NumComments;
+      
   /// \brief The set of external definitions stored in the the PCH
   /// file.
   llvm::SmallVector<uint64_t, 16> ExternalDefinitions;
@@ -452,6 +458,14 @@ public:
   /// build prior to including the precompiled header.
   const std::string &getSuggestedPredefines() { return SuggestedPredefines; }
 
+  /// \brief Reads the source ranges that correspond to comments from
+  /// an external AST source.
+  ///
+  /// \param Comments the contents of this vector will be
+  /// replaced with the sorted set of source ranges corresponding to
+  /// comments in the source code.
+  virtual void ReadComments(std::vector<SourceRange> &Comments);
+      
   /// \brief Resolve a type ID into a type, potentially building a new
   /// type.
   virtual QualType GetType(pch::TypeID ID);
diff --git a/include/clang/Frontend/PCHWriter.h b/include/clang/Frontend/PCHWriter.h
index 5cb939547f2c..c663442e64d8 100644
--- a/include/clang/Frontend/PCHWriter.h
+++ b/include/clang/Frontend/PCHWriter.h
@@ -166,6 +166,7 @@ private:
   void WriteSourceManagerBlock(SourceManager &SourceMgr, 
                                const Preprocessor &PP);
   void WritePreprocessor(const Preprocessor &PP);
+  void WriteComments(ASTContext &Context);
   void WriteType(const Type *T);
   void WriteTypesBlock(ASTContext &Context);
   uint64_t WriteDeclContextLexicalBlock(ASTContext &Context, DeclContext *DC);