1 files changed, 55 insertions, 0 deletions
diff --git a/test/SemaObjC/protocol-warn.m b/test/SemaObjC/protocol-warn.m
new file mode 100644
index 0000000..d0c51e3
--- /dev/null
+++ b/test/SemaObjC/protocol-warn.m
@@ -0,0 +1,55 @@
+// RUN: %clang_cc1 -fsyntax-only -verify %s
+// radar 7638810
+
+@protocol NSObject @end
+
+@interface NSObject <NSObject> @end
+
+@interface UIResponder : NSObject
+@end
+
+@implementation UIResponder
+@end
+
+@interface UIView : UIResponder
+@end
+
+@implementation UIView
+@end
+
+@interface UIWebTiledView : UIView
+@end
+
+@implementation UIWebTiledView
+@end
+
+@interface UIWebDocumentView : UIWebTiledView
+@end
+
+@implementation UIWebDocumentView
+@end
+
+@interface UIWebBrowserView : UIWebDocumentView
+@end
+
+@implementation UIWebBrowserView
+@end
+
+@interface UIPDFView : UIView
+@end
+
+@implementation UIPDFView
+@end
+
+@interface UIWebPDFView : UIPDFView
+@end
+
+@implementation UIWebPDFView
+@end
+
+UIWebPDFView *getView()
+{
+    UIWebBrowserView *browserView;
+    UIWebPDFView *pdfView;
+    return pdfView ? pdfView : browserView; // expected-warning {{incompatible pointer types returning 'UIView<NSObject> *', expected 'UIWebPDFView *'}}
+}