[modules] Remove now-unused MergedLookups map.

llvm-svn: 244277

2 files changed, 0 insertions, 27 deletions

diff --git a/clang/include/clang/Serialization/ASTReader.h b/clang/include/clang/Serialization/ASTReader.h
index 333d8d9a08d..227ac50d8fa 100644
--- a/clang/include/clang/Serialization/ASTReader.h
+++ b/clang/include/clang/Serialization/ASTReader.h
@@ -977,13 +977,6 @@ private:
   /// module is loaded.
   SmallVector<ObjCInterfaceDecl *, 16> ObjCClassesLoaded;
 
-  /// \brief A mapping from a primary context for a declaration chain to the
-  /// other declarations of that entity that also have name lookup tables.
-  /// Used when we merge together two class definitions that have different
-  /// sets of declared special member functions.
-  llvm::DenseMap<const DeclContext*, SmallVector<const DeclContext*, 2>>
-      MergedLookups;
-
   typedef llvm::DenseMap<Decl *, SmallVector<serialization::DeclID, 2> >
     KeyDeclsMap;
     
diff --git a/clang/lib/Serialization/ASTReaderDecl.cpp b/clang/lib/Serialization/ASTReaderDecl.cpp
index 0585234f150..b59b94f9bf9 100644
--- a/clang/lib/Serialization/ASTReaderDecl.cpp
+++ b/clang/lib/Serialization/ASTReaderDecl.cpp
@@ -1519,15 +1519,6 @@ void ASTDeclReader::MergeDefinitionData(
   auto &DD = *D->DefinitionData.getNotUpdated();
 
   if (DD.Definition != MergeDD.Definition) {
-    // If the new definition has new special members, let the name lookup
-    // code know that it needs to look in the new definition too.
-    //
-    // FIXME: We only need to do this if the merged definition declares members
-    // that this definition did not declare, or if it defines members that this
-    // definition did not define.
-    Reader.MergedLookups[DD.Definition].push_back(MergeDD.Definition);
-    DD.Definition->setHasExternalVisibleStorage();
-
     // Track that we merged the definitions.
     Reader.MergedDeclContexts.insert(std::make_pair(MergeDD.Definition,
                                                     DD.Definition));
@@ -3731,17 +3722,6 @@ void ASTDeclReader::UpdateDecl(Decl *D, ModuleFile &ModuleFile,
       // FIXME: We should call addHiddenDecl instead, to add the member
       // to its DeclContext.
       RD->addedMember(MD);
-
-      // If we've added a new special member to a class definition that is not
-      // the canonical definition, then we need special member lookups in the
-      // canonical definition to also look into our class.
-      auto *DD = RD->DefinitionData.getNotUpdated();
-      if (DD && DD->Definition != RD) {
-        auto &Merged = Reader.MergedLookups[DD->Definition];
-        // FIXME: Avoid the linear-time scan here.
-        if (std::find(Merged.begin(), Merged.end(), RD) == Merged.end())
-          Merged.push_back(RD);
-      }
       break;
     }