diff --git a/lib/Sema/SemaAccess.cpp b/lib/Sema/SemaAccess.cpp
index 9bb8f61..acc19d6 100644
--- a/lib/Sema/SemaAccess.cpp
+++ b/lib/Sema/SemaAccess.cpp
@@ -1701,7 +1701,7 @@
       return false;
     
     // If we're inside the same interface that owns the ivar, we're fine.
-    if (ClassOfMethodDecl == Ivar->getContainingInterface())
+    if (declaresSameEntity(ClassOfMethodDecl, Ivar->getContainingInterface()))
       return true;
     
     // If the ivar is private, it's inaccessible.
diff --git a/lib/Sema/SemaDeclObjC.cpp b/lib/Sema/SemaDeclObjC.cpp
index 5b8f749..b70c982 100644
--- a/lib/Sema/SemaDeclObjC.cpp
+++ b/lib/Sema/SemaDeclObjC.cpp
@@ -417,7 +417,7 @@
           DeclarationNameInfo(SuperName, SuperLoc), LookupOrdinaryName, TUScope,
           NULL, NULL, false, CTC_NoKeywords);
       if ((PrevDecl = Corrected.getCorrectionDeclAs<ObjCInterfaceDecl>())) {
-        if (PrevDecl == IDecl) {
+        if (declaresSameEntity(PrevDecl, IDecl)) {
           // Don't correct to the class we're defining.
           PrevDecl = 0;
         } else {
@@ -429,7 +429,7 @@
       }
     }
 
-    if (PrevDecl == IDecl) {
+    if (declaresSameEntity(PrevDecl, IDecl)) {
       Diag(SuperLoc, diag::err_recursive_superclass)
         << SuperName << ClassName << SourceRange(AtInterfaceLoc, ClassLoc);
       IDecl->setLocEnd(ClassLoc);
@@ -924,7 +924,7 @@
       if (!SDecl)
         Diag(SuperClassLoc, diag::err_undef_superclass)
           << SuperClassname << ClassName;
-      else if (IDecl && IDecl->getSuperClass() != SDecl) {
+      else if (IDecl && !declaresSameEntity(IDecl->getSuperClass(), SDecl)) {
         // This implementation and its interface do not have the same
         // super class.
         Diag(SuperClassLoc, diag::err_conflicting_super_class)
@@ -2439,7 +2439,7 @@
       if (ObjCInterfaceDecl *ResultClass 
                                       = ResultObjectType->getInterfaceDecl()) {
         //   - it is the same as the method's class type, or
-        if (CurrentClass == ResultClass)
+        if (declaresSameEntity(CurrentClass, ResultClass))
           return RTC_Compatible;
         
         //   - it is a superclass of the method's class type
diff --git a/lib/Sema/SemaExpr.cpp b/lib/Sema/SemaExpr.cpp
index 8231cda..c18d37d 100644
--- a/lib/Sema/SemaExpr.cpp
+++ b/lib/Sema/SemaExpr.cpp
@@ -1975,7 +1975,7 @@
 
       // Diagnose the use of an ivar outside of the declaring class.
       if (IV->getAccessControl() == ObjCIvarDecl::Private &&
-          ClassDeclared != IFace)
+          !declaresSameEntity(ClassDeclared, IFace))
         Diag(Loc, diag::error_private_ivar_access) << IV->getDeclName();
 
       // FIXME: This should use a new expr for a direct reference, don't
@@ -2005,7 +2005,7 @@
       ObjCInterfaceDecl *ClassDeclared;
       if (ObjCIvarDecl *IV = IFace->lookupInstanceVariable(II, ClassDeclared)) {
         if (IV->getAccessControl() != ObjCIvarDecl::Private ||
-            IFace == ClassDeclared)
+            declaresSameEntity(IFace, ClassDeclared))
           Diag(Loc, diag::warn_ivar_use_hidden) << IV->getDeclName();
       }
     }
diff --git a/lib/Sema/SemaExprMember.cpp b/lib/Sema/SemaExprMember.cpp
index da09968..03b1731 100644
--- a/lib/Sema/SemaExprMember.cpp
+++ b/lib/Sema/SemaExprMember.cpp
@@ -1150,8 +1150,8 @@
       }
 
       if (IV->getAccessControl() == ObjCIvarDecl::Private) {
-        if (ClassDeclared != IDecl ||
-            ClassOfMethodDecl != ClassDeclared)
+        if (!declaresSameEntity(ClassDeclared, IDecl) ||
+            !declaresSameEntity(ClassOfMethodDecl, ClassDeclared))
           Diag(MemberLoc, diag::error_private_ivar_access)
             << IV->getDeclName();
       } else if (!IDecl->isSuperClassOf(ClassOfMethodDecl))
diff --git a/lib/Sema/SemaObjCProperty.cpp b/lib/Sema/SemaObjCProperty.cpp
index e754e73..7436745 100644
--- a/lib/Sema/SemaObjCProperty.cpp
+++ b/lib/Sema/SemaObjCProperty.cpp
@@ -690,7 +690,7 @@
       // Note! I deliberately want it to fall thru so, we have a
       // a property implementation and to avoid future warnings.
     } else if (getLangOptions().ObjCNonFragileABI &&
-               ClassDeclared != IDecl) {
+               !declaresSameEntity(ClassDeclared, IDecl)) {
       Diag(PropertyLoc, diag::error_ivar_in_superclass_use)
       << property->getDeclName() << Ivar->getDeclName()
       << ClassDeclared->getDeclName();
@@ -870,7 +870,7 @@
       }
       // Issue diagnostics only if Ivar belongs to current class.
       if (Ivar && Ivar->getSynthesize() && 
-          IC->getClassInterface() == ClassDeclared) {
+          declaresSameEntity(IC->getClassInterface(), ClassDeclared)) {
         Diag(Ivar->getLocation(), diag::err_undeclared_var_use) 
         << PropertyId;
         Ivar->setInvalidDecl();
diff --git a/lib/Sema/SemaOverload.cpp b/lib/Sema/SemaOverload.cpp
index 7ddb151..d0d1484 100644
--- a/lib/Sema/SemaOverload.cpp
+++ b/lib/Sema/SemaOverload.cpp
@@ -2300,7 +2300,8 @@
                  ToType->getAs<ObjCObjectPointerType>()) {
         if (const ObjCObjectPointerType *PTFr =
               FromType->getAs<ObjCObjectPointerType>())
-          if (PTTo->getInterfaceDecl() == PTFr->getInterfaceDecl())
+          if (declaresSameEntity(PTTo->getInterfaceDecl(), 
+                                 PTFr->getInterfaceDecl()))
             continue;
       }
       if (ArgPos) *ArgPos = O - OldType->arg_type_begin();