From 7263feeb367ab55af7e9a6fd701148b1b8264dba Mon Sep 17 00:00:00 2001
From: Fariborz Jahanian <fjahanian@apple.com>
Date: Wed, 6 Jul 2011 20:48:48 +0000
Subject: [PATCH] Some code cleanup of r134522

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@134529 91177308-0d34-0410-b5e6-96231b3b80d8
---
 include/clang/AST/DeclObjC.h | 12 ++++++++++++
 lib/Sema/SemaType.cpp        |  9 +--------
 2 files changed, 13 insertions(+), 8 deletions(-)

diff --git a/include/clang/AST/DeclObjC.h b/include/clang/AST/DeclObjC.h
index 2c12b837bd..a60d2c92f7 100644
--- a/include/clang/AST/DeclObjC.h
+++ b/include/clang/AST/DeclObjC.h
@@ -641,6 +641,18 @@ public:
     return false;
   }
 
+  /// isArcWeakrefUnavailable - Checks for a class or one of its super classes
+  /// to be incompatible with __weak references. Returns true if it is.
+  bool isArcWeakrefUnavailable() const {
+    const ObjCInterfaceDecl *Class = this;
+    while (Class) {
+      if (Class->hasAttr<ArcWeakrefUnavailableAttr>())
+        return true;
+      Class = Class->getSuperClass();
+   }
+   return false; 
+  }
+
   ObjCIvarDecl *lookupInstanceVariable(IdentifierInfo *IVarName,
                                        ObjCInterfaceDecl *&ClassDeclared);
   ObjCIvarDecl *lookupInstanceVariable(IdentifierInfo *IVarName) {
diff --git a/lib/Sema/SemaType.cpp b/lib/Sema/SemaType.cpp
index ae1ccf9886..f9cf630420 100644
--- a/lib/Sema/SemaType.cpp
+++ b/lib/Sema/SemaType.cpp
@@ -3212,21 +3212,14 @@ static bool handleObjCOwnershipTypeAttr(TypeProcessingState &state,
   // objc_arc_weak_reference_unavailable
   if (lifetime == Qualifiers::OCL_Weak) {
     QualType T = type;
-    if (T->isReferenceType()) {
-      T = T->getAs<ReferenceType>()->getPointeeType();
-    }
     while (const PointerType *ptr = T->getAs<PointerType>())
       T = ptr->getPointeeType();
     if (const ObjCObjectPointerType *ObjT = T->getAs<ObjCObjectPointerType>()) {
       ObjCInterfaceDecl *Class = ObjT->getInterfaceDecl();
-      while (Class) {
-        if (Class->hasAttr<ArcWeakrefUnavailableAttr>()) {
+      if (Class->isArcWeakrefUnavailable()) {
           S.Diag(attr.getLoc(), diag::err_arc_unsupported_weak_class);
           S.Diag(ObjT->getInterfaceDecl()->getLocation(), 
                  diag::note_class_declared);
-          break;
-        }
-        Class = Class->getSuperClass();
       }
     }
   }
-- 
2.50.1