1 files changed, 78 insertions, 0 deletions
diff --git a/clang/test/SemaCXX/warn-weak-vtables.cpp b/clang/test/SemaCXX/warn-weak-vtables.cpp
new file mode 100644
index 0000000..135e034
--- /dev/null
+++ b/clang/test/SemaCXX/warn-weak-vtables.cpp
@@ -0,0 +1,78 @@
+// RUN: %clang_cc1 %s -fsyntax-only -verify -Wweak-vtables -Wweak-template-vtables
+
+struct A { // expected-warning {{'A' has no out-of-line virtual method definitions; its vtable will be emitted in every translation unit}}
+  virtual void f() { } 
+};
+
+template<typename T> struct B {
+  virtual void f() { } 
+};
+
+namespace {
+  struct C { 
+    virtual void f() { }
+  };
+}
+
+void f() {
+  struct A {
+    virtual void f() { }
+  };
+
+  A *a;
+  a->f();
+}
+
+// Use the vtables
+void uses(A &a, B<int> &b, C &c) {
+  a.f();
+  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();
+}
+
+template<typename T> struct TemplVirt {
+  virtual void f();
+};
+
+template class TemplVirt<float>; // expected-warning{{explicit template instantiation 'TemplVirt<float>' will emit a vtable in every translation unit}}
+
+template<> struct TemplVirt<bool> {
+  virtual void f();
+};
+
+template<> struct TemplVirt<long> { // expected-warning{{'TemplVirt<long>' has no out-of-line virtual method definitions; its vtable will be emitted in every translation unit}}
+  virtual void f() {}
+};
+
+void uses(TemplVirt<float>& f, TemplVirt<bool>& b, TemplVirt<long>& l) {
+  f.f();
+  b.f();
+  l.f();
+}