Warn on usage of unavailable objc 'class' in

varienty of cases. // rdar://9092208

llvm-svn: 127257

clang/lib/Sema/SemaDecl.cpp

@@ -212,6 +212,7 @@ ParsedType Sema::getTypeName(IdentifierInfo &II, SourceLocation NameLoc,
       }
     }
   } else if (ObjCInterfaceDecl *IDecl = dyn_cast<ObjCInterfaceDecl>(IIDecl)) {
+    (void)DiagnoseUseOfDecl(IDecl, NameLoc);
     if (!HasTrailingDot)
       T = Context.getObjCInterfaceType(IDecl);
   }

clang/lib/Sema/SemaExprObjC.cpp

@@ -868,7 +868,7 @@ ExprResult Sema::BuildClassMessage(TypeSourceInfo *ReceiverTypeInfo,
     return ExprError();
   }
   assert(Class && "We don't know which class we're messaging?");
-
+  (void)DiagnoseUseOfDecl(Class, Loc);
   // Find the method we are messaging.
   if (!Method) {
     if (Class->isForwardDecl()) {

clang/test/SemaObjC/class-unavail-warning.m

@@ -0,0 +1,24 @@
+// RUN: %clang_cc1  -fsyntax-only -verify %s
+// rdar://9092208
+
+__attribute__((unavailable("not available")))
+@interface MyClass { // expected-note 5 {{function has been explicitly marked unavailable here}}
+@public
+    void *_test;
+}
+
+- (id)self;
+- new;
++ (void)addObject:(id)anObject;
+
+@end
+
+int main() {
+ [MyClass new]; // expected-error {{'MyClass' is unavailable: not available}}
+ [MyClass self]; // expected-error {{'MyClass' is unavailable: not available}}
+ [MyClass addObject:((void *)0)]; // expected-error {{'MyClass' is unavailable: not available}}
+
+ MyClass *foo = [MyClass new]; // expected-error 2 {{'MyClass' is unavailable: not available}}
+
+ return 0;
+}