diff --git a/include/clang/AST/DeclCXX.h b/include/clang/AST/DeclCXX.h
index c3b71b9..9cd5d1c 100644
--- a/include/clang/AST/DeclCXX.h
+++ b/include/clang/AST/DeclCXX.h
@@ -1999,6 +1999,10 @@
   /// \brief Target nested name specifier.
   NestedNameSpecifier* TargetNestedName;
 
+  /// DNLoc - Provides source/type location info for the
+  /// declaration name embedded in the ValueDecl base class.
+  DeclarationNameLoc DNLoc;
+
   /// \brief The collection of shadow declarations associated with
   /// this using declaration.  This set can change as a class is
   /// processed.
@@ -2007,34 +2011,31 @@
   // \brief Has 'typename' keyword.
   bool IsTypeName;
 
-  UsingDecl(DeclContext *DC, SourceLocation L, SourceRange NNR,
+  UsingDecl(DeclContext *DC, SourceRange NNR,
             SourceLocation UL, NestedNameSpecifier* TargetNNS,
-            DeclarationName Name, bool IsTypeNameArg)
-    : NamedDecl(Using, DC, L, Name),
+            const DeclarationNameInfo &NameInfo, bool IsTypeNameArg)
+    : NamedDecl(Using, DC, NameInfo.getLoc(), NameInfo.getName()),
       NestedNameRange(NNR), UsingLocation(UL), TargetNestedName(TargetNNS),
-      IsTypeName(IsTypeNameArg) {
+      DNLoc(NameInfo.getInfo()), IsTypeName(IsTypeNameArg) {
   }
 
 public:
-  // FIXME: Should be const?
   /// \brief Returns the source range that covers the nested-name-specifier
   /// preceding the namespace name.
-  SourceRange getNestedNameRange() { return NestedNameRange; }
+  SourceRange getNestedNameRange() const { return NestedNameRange; }
 
   /// \brief Set the source range of the nested-name-specifier.
   void setNestedNameRange(SourceRange R) { NestedNameRange = R; }
 
-  // FIXME; Should be const?
   // FIXME: Naming is inconsistent with other get*Loc functions.
   /// \brief Returns the source location of the "using" keyword.
-  SourceLocation getUsingLocation() { return UsingLocation; }
+  SourceLocation getUsingLocation() const { return UsingLocation; }
 
   /// \brief Set the source location of the 'using' keyword.
   void setUsingLocation(SourceLocation L) { UsingLocation = L; }
 
-
   /// \brief Get the target nested name declaration.
-  NestedNameSpecifier* getTargetNestedNameDecl() {
+  NestedNameSpecifier* getTargetNestedNameDecl() const {
     return TargetNestedName;
   }
 
@@ -2043,6 +2044,10 @@
     TargetNestedName = NNS;
   }
 
+  DeclarationNameInfo getNameInfo() const {
+    return DeclarationNameInfo(getDeclName(), getLocation(), DNLoc);
+  }
+
   /// \brief Return true if the using declaration has 'typename'.
   bool isTypeName() const { return IsTypeName; }
 
@@ -2073,8 +2078,10 @@
   }
 
   static UsingDecl *Create(ASTContext &C, DeclContext *DC,
-      SourceLocation IdentL, SourceRange NNR, SourceLocation UsingL,
-      NestedNameSpecifier* TargetNNS, DeclarationName Name, bool IsTypeNameArg);
+                           SourceRange NNR, SourceLocation UsingL,
+                           NestedNameSpecifier* TargetNNS,
+                           const DeclarationNameInfo &NameInfo,
+                           bool IsTypeNameArg);
 
   static bool classof(const Decl *D) { return classofKind(D->getKind()); }
   static bool classof(const UsingDecl *D) { return true; }
@@ -2102,14 +2109,18 @@
 
   NestedNameSpecifier *TargetNestedNameSpecifier;
 
+  /// DNLoc - Provides source/type location info for the
+  /// declaration name embedded in the ValueDecl base class.
+  DeclarationNameLoc DNLoc;
+
   UnresolvedUsingValueDecl(DeclContext *DC, QualType Ty,
                            SourceLocation UsingLoc, SourceRange TargetNNR,
                            NestedNameSpecifier *TargetNNS,
-                           SourceLocation TargetNameLoc,
-                           DeclarationName TargetName)
-    : ValueDecl(UnresolvedUsingValue, DC, TargetNameLoc, TargetName, Ty),
-    TargetNestedNameRange(TargetNNR), UsingLocation(UsingLoc),
-    TargetNestedNameSpecifier(TargetNNS)
+                           const DeclarationNameInfo &NameInfo)
+    : ValueDecl(UnresolvedUsingValue, DC,
+                NameInfo.getLoc(), NameInfo.getName(), Ty),
+      TargetNestedNameRange(TargetNNR), UsingLocation(UsingLoc),
+      TargetNestedNameSpecifier(TargetNNS), DNLoc(NameInfo.getInfo())
   { }
 
 public:
@@ -2122,7 +2133,7 @@
   void setTargetNestedNameRange(SourceRange R) { TargetNestedNameRange = R; }
 
   /// \brief Get target nested name declaration.
-  NestedNameSpecifier* getTargetNestedNameSpecifier() {
+  NestedNameSpecifier* getTargetNestedNameSpecifier() const {
     return TargetNestedNameSpecifier;
   }
 
@@ -2137,10 +2148,14 @@
   /// \brief Set the source location of the 'using' keyword.
   void setUsingLoc(SourceLocation L) { UsingLocation = L; }
 
+  DeclarationNameInfo getNameInfo() const {
+    return DeclarationNameInfo(getDeclName(), getLocation(), DNLoc);
+  }
+
   static UnresolvedUsingValueDecl *
     Create(ASTContext &C, DeclContext *DC, SourceLocation UsingLoc,
            SourceRange TargetNNR, NestedNameSpecifier *TargetNNS,
-           SourceLocation TargetNameLoc, DeclarationName TargetName);
+           const DeclarationNameInfo &NameInfo);
 
   static bool classof(const Decl *D) { return classofKind(D->getKind()); }
   static bool classof(const UnresolvedUsingValueDecl *D) { return true; }
diff --git a/lib/AST/DeclCXX.cpp b/lib/AST/DeclCXX.cpp
index 75b3558..eed3702 100644
--- a/lib/AST/DeclCXX.cpp
+++ b/lib/AST/DeclCXX.cpp
@@ -1010,10 +1010,11 @@
 }
 
 UsingDecl *UsingDecl::Create(ASTContext &C, DeclContext *DC,
-      SourceLocation L, SourceRange NNR, SourceLocation UL,
-      NestedNameSpecifier* TargetNNS, DeclarationName Name,
-      bool IsTypeNameArg) {
-  return new (C) UsingDecl(DC, L, NNR, UL, TargetNNS, Name, IsTypeNameArg);
+                             SourceRange NNR, SourceLocation UL,
+                             NestedNameSpecifier* TargetNNS,
+                             const DeclarationNameInfo &NameInfo,
+                             bool IsTypeNameArg) {
+  return new (C) UsingDecl(DC, NNR, UL, TargetNNS, NameInfo, IsTypeNameArg);
 }
 
 UnresolvedUsingValueDecl *
@@ -1021,11 +1022,9 @@
                                  SourceLocation UsingLoc,
                                  SourceRange TargetNNR,
                                  NestedNameSpecifier *TargetNNS,
-                                 SourceLocation TargetNameLoc,
-                                 DeclarationName TargetName) {
+                                 const DeclarationNameInfo &NameInfo) {
   return new (C) UnresolvedUsingValueDecl(DC, C.DependentTy, UsingLoc,
-                                          TargetNNR, TargetNNS,
-                                          TargetNameLoc, TargetName);
+                                          TargetNNR, TargetNNS, NameInfo);
 }
 
 UnresolvedUsingTypenameDecl *
diff --git a/lib/Frontend/PCHReaderDecl.cpp b/lib/Frontend/PCHReaderDecl.cpp
index cb18108..212eaa1 100644
--- a/lib/Frontend/PCHReaderDecl.cpp
+++ b/lib/Frontend/PCHReaderDecl.cpp
@@ -626,6 +626,7 @@
   D->setUsingLocation(Reader.ReadSourceLocation(Record, Idx));
   D->setNestedNameRange(Reader.ReadSourceRange(Record, Idx));
   D->setTargetNestedNameDecl(Reader.ReadNestedNameSpecifier(Record, Idx));
+  // FIXME: read the DNLoc component.
 
   // FIXME: It would probably be more efficient to read these into a vector
   // and then re-cosntruct the shadow decl set over that vector since it
@@ -668,6 +669,7 @@
   D->setTargetNestedNameRange(Reader.ReadSourceRange(Record, Idx));
   D->setUsingLoc(Reader.ReadSourceLocation(Record, Idx));
   D->setTargetNestedNameSpecifier(Reader.ReadNestedNameSpecifier(Record, Idx));
+  // FIXME: read the DNLoc component.
 }
 
 void PCHDeclReader::VisitUnresolvedUsingTypenameDecl(
@@ -1378,8 +1380,8 @@
                                    SourceLocation(), 0);
     break;
   case pch::DECL_USING:
-    D = UsingDecl::Create(*Context, 0, SourceLocation(), SourceRange(),
-                          SourceLocation(), 0, DeclarationName(), false);
+    D = UsingDecl::Create(*Context, 0, SourceRange(), SourceLocation(),
+                          0, DeclarationNameInfo(), false);
     break;
   case pch::DECL_USING_SHADOW:
     D = UsingShadowDecl::Create(*Context, 0, SourceLocation(), 0, 0);
@@ -1391,8 +1393,8 @@
     break;
   case pch::DECL_UNRESOLVED_USING_VALUE:
     D = UnresolvedUsingValueDecl::Create(*Context, 0, SourceLocation(),
-                                         SourceRange(), 0, SourceLocation(),
-                                         DeclarationName());
+                                         SourceRange(), 0,
+                                         DeclarationNameInfo());
     break;
   case pch::DECL_UNRESOLVED_USING_TYPENAME:
     D = UnresolvedUsingTypenameDecl::Create(*Context, 0, SourceLocation(),
diff --git a/lib/Sema/Sema.h b/lib/Sema/Sema.h
index 31c7e0e..ff3fc40 100644
--- a/lib/Sema/Sema.h
+++ b/lib/Sema/Sema.h
@@ -2248,8 +2248,7 @@
   NamedDecl *BuildUsingDeclaration(Scope *S, AccessSpecifier AS,
                                    SourceLocation UsingLoc,
                                    CXXScopeSpec &SS,
-                                   SourceLocation IdentLoc,
-                                   DeclarationName Name,
+                                   const DeclarationNameInfo &NameInfo,
                                    AttributeList *AttrList,
                                    bool IsInstantiation,
                                    bool IsTypeName,
diff --git a/lib/Sema/SemaDeclCXX.cpp b/lib/Sema/SemaDeclCXX.cpp
index 4156df0..c27ca91 100644
--- a/lib/Sema/SemaDeclCXX.cpp
+++ b/lib/Sema/SemaDeclCXX.cpp
@@ -3476,8 +3476,9 @@
       << SourceRange(Name.TemplateId->LAngleLoc, Name.TemplateId->RAngleLoc);
     return DeclPtrTy();
   }
-  
-  DeclarationName TargetName = GetNameFromUnqualifiedId(Name).getName();
+
+  DeclarationNameInfo TargetNameInfo = GetNameFromUnqualifiedId(Name);
+  DeclarationName TargetName = TargetNameInfo.getName();
   if (!TargetName)
     return DeclPtrTy();
 
@@ -3493,8 +3494,7 @@
   }
 
   NamedDecl *UD = BuildUsingDeclaration(S, AS, UsingLoc, SS,
-                                        Name.getSourceRange().getBegin(),
-                                        TargetName, AttrList,
+                                        TargetNameInfo, AttrList,
                                         /* IsInstantiation */ false,
                                         IsTypeName, TypenameLoc);
   if (UD)
@@ -3743,13 +3743,13 @@
 NamedDecl *Sema::BuildUsingDeclaration(Scope *S, AccessSpecifier AS,
                                        SourceLocation UsingLoc,
                                        CXXScopeSpec &SS,
-                                       SourceLocation IdentLoc,
-                                       DeclarationName Name,
+                                       const DeclarationNameInfo &NameInfo,
                                        AttributeList *AttrList,
                                        bool IsInstantiation,
                                        bool IsTypeName,
                                        SourceLocation TypenameLoc) {
   assert(!SS.isInvalid() && "Invalid CXXScopeSpec.");
+  SourceLocation IdentLoc = NameInfo.getLoc();
   assert(IdentLoc.isValid() && "Invalid TargetName location.");
 
   // FIXME: We ignore attributes for now.
@@ -3761,7 +3761,7 @@
   }
 
   // Do the redeclaration lookup in the current scope.
-  LookupResult Previous(*this, Name, IdentLoc, LookupUsingDeclName,
+  LookupResult Previous(*this, NameInfo, LookupUsingDeclName,
                         ForRedeclaration);
   Previous.setHideTags(false);
   if (S) {
@@ -3800,15 +3800,15 @@
       D = UnresolvedUsingTypenameDecl::Create(Context, CurContext,
                                               UsingLoc, TypenameLoc,
                                               SS.getRange(), NNS,
-                                              IdentLoc, Name);
+                                              IdentLoc, NameInfo.getName());
     } else {
       D = UnresolvedUsingValueDecl::Create(Context, CurContext,
-                                           UsingLoc, SS.getRange(), NNS,
-                                           IdentLoc, Name);
+                                           UsingLoc, SS.getRange(),
+                                           NNS, NameInfo);
     }
   } else {
-    D = UsingDecl::Create(Context, CurContext, IdentLoc,
-                          SS.getRange(), UsingLoc, NNS, Name,
+    D = UsingDecl::Create(Context, CurContext,
+                          SS.getRange(), UsingLoc, NNS, NameInfo,
                           IsTypeName);
   }
   D->setAccess(AS);
@@ -3824,7 +3824,7 @@
 
   // Look up the target name.
 
-  LookupResult R(*this, Name, IdentLoc, LookupOrdinaryName);
+  LookupResult R(*this, NameInfo, LookupOrdinaryName);
 
   // Unlike most lookups, we don't always want to hide tag
   // declarations: tag names are visible through the using declaration
@@ -3837,7 +3837,7 @@
 
   if (R.empty()) {
     Diag(IdentLoc, diag::err_no_member) 
-      << Name << LookupContext << SS.getRange();
+      << NameInfo.getName() << LookupContext << SS.getRange();
     UD->setInvalidDecl();
     return UD;
   }
diff --git a/lib/Sema/SemaTemplateInstantiateDecl.cpp b/lib/Sema/SemaTemplateInstantiateDecl.cpp
index fe21ace..cbdd9d5 100644
--- a/lib/Sema/SemaTemplateInstantiateDecl.cpp
+++ b/lib/Sema/SemaTemplateInstantiateDecl.cpp
@@ -1544,22 +1544,22 @@
 
 Decl *TemplateDeclInstantiator::VisitUsingDecl(UsingDecl *D) {
   // The nested name specifier is non-dependent, so no transformation
-  // is required.
+  // is required. The same holds for the name info.
+  DeclarationNameInfo NameInfo = D->getNameInfo();
 
   // We only need to do redeclaration lookups if we're in a class
   // scope (in fact, it's not really even possible in non-class
   // scopes).
   bool CheckRedeclaration = Owner->isRecord();
 
-  LookupResult Prev(SemaRef, D->getDeclName(), D->getLocation(),
-                    Sema::LookupUsingDeclName, Sema::ForRedeclaration);
+  LookupResult Prev(SemaRef, NameInfo, Sema::LookupUsingDeclName,
+                    Sema::ForRedeclaration);
 
   UsingDecl *NewUD = UsingDecl::Create(SemaRef.Context, Owner,
-                                       D->getLocation(),
                                        D->getNestedNameRange(),
                                        D->getUsingLocation(),
                                        D->getTargetNestedNameDecl(),
-                                       D->getDeclName(),
+                                       NameInfo,
                                        D->isTypeName());
 
   CXXScopeSpec SS;
@@ -1635,10 +1635,12 @@
   SS.setRange(D->getTargetNestedNameRange());
   SS.setScopeRep(NNS);
 
+  // Since NameInfo refers to a typename, it cannot be a C++ special name.
+  // Hence, no tranformation is required for it.
+  DeclarationNameInfo NameInfo(D->getDeclName(), D->getLocation());
   NamedDecl *UD =
     SemaRef.BuildUsingDeclaration(/*Scope*/ 0, D->getAccess(),
-                                  D->getUsingLoc(), SS, D->getLocation(),
-                                  D->getDeclName(), 0,
+                                  D->getUsingLoc(), SS, NameInfo, 0,
                                   /*instantiation*/ true,
                                   /*typename*/ true, D->getTypenameLoc());
   if (UD)
@@ -1660,10 +1662,12 @@
   SS.setRange(D->getTargetNestedNameRange());
   SS.setScopeRep(NNS);
 
+  DeclarationNameInfo NameInfo
+    = SemaRef.SubstDeclarationNameInfo(D->getNameInfo(), TemplateArgs);
+
   NamedDecl *UD =
     SemaRef.BuildUsingDeclaration(/*Scope*/ 0, D->getAccess(),
-                                  D->getUsingLoc(), SS, D->getLocation(),
-                                  D->getDeclName(), 0,
+                                  D->getUsingLoc(), SS, NameInfo, 0,
                                   /*instantiation*/ true,
                                   /*typename*/ false, SourceLocation());
   if (UD)