Mark the operator delete associated with a virtual destructor as referenced.

llvm-svn: 107573
diff --git a/clang/test/SemaCXX/destructor.cpp b/clang/test/SemaCXX/destructor.cpp
index 3c63c3d..2c60b32 100644
--- a/clang/test/SemaCXX/destructor.cpp
+++ b/clang/test/SemaCXX/destructor.cpp
@@ -88,3 +88,20 @@
 
 struct X0 { virtual ~X0() throw(); };
 struct X1 : public X0 { };
+
+// Make sure we instantiate operator deletes when building a virtual
+// destructor.
+namespace test6 {
+  template <class T> class A {
+  public:
+    void *operator new(unsigned long);
+    void operator delete(void *p) {
+      T::deleteIt(p); // expected-error {{type 'int' cannot be used prior to '::'}}
+    }
+
+    virtual ~A() {} // expected-note {{in instantiation of member function 'test6::A<int>::operator delete' requested here}}
+  };
+
+  class B : A<int> { B(); };
+  B::B() {}
+}