Baby step towards supporting namespaces in chained PCH.

llvm-svn: 111878

clang/include/clang/Serialization/ASTBitCodes.h

@@ -311,7 +311,12 @@ namespace clang {
       /// If a declaration is modified after having been deserialized, and then
       /// written to a dependent AST file, its ID and offset must be added to
       /// the replacement block.
-      DECL_REPLACEMENTS = 33
+      DECL_REPLACEMENTS = 33,
+
+      /// \brief Record code for an update to a decl context's lookup table.
+      ///
+      /// In practice, this should only be used for the TU and namespaces.
+      UPDATE_VISIBLE = 34
     };
 
     /// \brief Record types used within a source manager block.

clang/include/clang/Serialization/ASTReader.h

@@ -10,7 +10,7 @@
 //  This file defines the ASTReader class, which reads AST files.
 //
 //===----------------------------------------------------------------------===//
-                                                                          
+
 #ifndef LLVM_CLANG_FRONTEND_AST_READER_H
 #define LLVM_CLANG_FRONTEND_AST_READER_H
 

clang/lib/Serialization/ASTReader.cpp

@@ -3210,7 +3210,7 @@ ASTReader::FindExternalVisibleDeclsByName(const DeclContext *DC,
                                       DeclContext::lookup_iterator(0));
 
   llvm::SmallVector<NamedDecl *, 64> Decls;
-  // There might be lexical decls in multiple parts of the chain, for the TU
+  // There might be visible decls in multiple parts of the chain, for the TU
   // and namespaces.
   DeclContextInfos &Infos = DeclContextOffsets[DC];
   for (DeclContextInfos::iterator I = Infos.begin(), E = Infos.end();