3 files changed, 9 insertions, 2 deletions
diff --git a/include/clang/Frontend/PCHBitCodes.h b/include/clang/Frontend/PCHBitCodes.h
index 25d3f09127..0a51961413 100644
--- a/include/clang/Frontend/PCHBitCodes.h
+++ b/include/clang/Frontend/PCHBitCodes.h
@@ -236,8 +236,10 @@ namespace clang {
 
       /// \brief Record code for the chained PCH metadata, including the
       /// PCH version and the name of the PCH this is chained to.
-      CHAINED_METADATA = 26
-
+      CHAINED_METADATA = 26,
+      
+      /// \brief Record  code for referenced selector pool.
+      REFERENCED_SELECTOR_POOL = 27
     };
 
     /// \brief Record types used within a source manager block.
diff --git a/include/clang/Frontend/PCHReader.h b/include/clang/Frontend/PCHReader.h
index 8e2e3cafa6..17a733ce30 100644
--- a/include/clang/Frontend/PCHReader.h
+++ b/include/clang/Frontend/PCHReader.h
@@ -281,6 +281,10 @@ private:
     /// \brief The number of preallocated preprocessing entities in the
     /// preprocessing record.
     unsigned NumPreallocatedPreprocessingEntities;
+
+    /// \brief Method selectors used in a @selector expression. Used for
+    /// implementation of -Wselector.
+    llvm::SmallVector<long long unsigned int,64u> ReferencedSelectorsData;
   };
 
   /// \brief The chain of PCH files. The first entry is the one named by the
diff --git a/include/clang/Frontend/PCHWriter.h b/include/clang/Frontend/PCHWriter.h
index f2f3ed4a91..ab6c6ef8c6 100644
--- a/include/clang/Frontend/PCHWriter.h
+++ b/include/clang/Frontend/PCHWriter.h
@@ -242,6 +242,7 @@ private:
   uint64_t WriteDeclContextVisibleBlock(ASTContext &Context, DeclContext *DC);
   void WriteTypeDeclOffsets();
   void WriteMethodPool(Sema &SemaRef);
+  void WriteReferencedSelectorsPool(Sema &SemaRef);
   void WriteIdentifierTable(Preprocessor &PP);
   void WriteAttributeRecord(const Attr *Attr);