1 files changed, 27 insertions, 0 deletions
diff --git a/clang/test/SemaCXX/warn-weak-vtables.cpp b/clang/test/SemaCXX/warn-weak-vtables.cpp
index c0cfd74a3e5..912622f5a7e 100644
--- a/clang/test/SemaCXX/warn-weak-vtables.cpp
+++ b/clang/test/SemaCXX/warn-weak-vtables.cpp
@@ -29,3 +29,30 @@ void uses(A &a, B<int> &b, C &c) {
   b.f();
   c.f();
 }
+
+// <rdar://problem/9979458>
+class Parent {
+public:
+  Parent() {}
+  virtual ~Parent();
+  virtual void * getFoo() const = 0;    
+};
+  
+class Derived : public Parent {
+public:
+  Derived();
+  void * getFoo() const;
+};
+
+class VeryDerived : public Derived { // expected-warning{{'VeryDerived' has no out-of-line virtual method definitions; its vtable will be emitted in every translation unit}}
+public:
+  void * getFoo() const { return 0; }
+};
+
+Parent::~Parent() {}
+
+void uses(Parent &p, Derived &d, VeryDerived &vd) {
+  p.getFoo();
+  d.getFoo();
+  vd.getFoo();
+}