1 files changed, 52 insertions, 0 deletions
diff --git a/build/clang-plugin/alpha/tests/TestTempRefPtr.cpp b/build/clang-plugin/alpha/tests/TestTempRefPtr.cpp
new file mode 100644
index 0000000000..51f756b8e6
--- /dev/null
+++ b/build/clang-plugin/alpha/tests/TestTempRefPtr.cpp
@@ -0,0 +1,52 @@
+#include <mozilla/RefPtr.h>
+
+using namespace mozilla;
+
+struct RefCountedBase {
+  void AddRef();
+  void Release();
+
+  void method_test();
+};
+
+struct RefCountedBaseHolder {
+  RefPtr<RefCountedBase> GetRefCountedBase() const {
+    return mRefCountedBase;
+  }
+
+private:
+  RefPtr<RefCountedBase> mRefCountedBase = MakeRefPtr<RefCountedBase>();
+};
+
+
+void test_arrow_temporary_new_refptr_function_style_cast() {
+  RefPtr<RefCountedBase>(new RefCountedBase())->method_test(); // expected-warning {{performance issue: temporary 'RefPtr<RefCountedBase>' is only dereferenced here once which involves short-lived AddRef/Release calls}}
+}
+
+void test_arrow_temporary_new_refptr_brace() {
+  RefPtr<RefCountedBase>{new RefCountedBase()}->method_test(); // expected-warning {{performance issue: temporary 'RefPtr<RefCountedBase>' is only dereferenced here once which involves short-lived AddRef/Release calls}}
+}
+
+void test_arrow_temporary_new_c_style_cast() {
+  ((RefPtr<RefCountedBase>)(new RefCountedBase()))->method_test(); // expected-warning {{performance issue: temporary 'RefPtr<RefCountedBase>' is only dereferenced here once which involves short-lived AddRef/Release calls}}
+}
+
+void test_arrow_temporary_new_static_cast() {
+  static_cast<RefPtr<RefCountedBase>>(new RefCountedBase())->method_test(); // expected-warning {{performance issue: temporary 'RefPtr<RefCountedBase>' is only dereferenced here once which involves short-lived AddRef/Release calls}}
+}
+
+void test_arrow_temporary_new_refptr_makerefptr() {
+  MakeRefPtr<RefCountedBase>()->method_test(); // expected-warning {{performance issue: temporary 'RefPtr<RefCountedBase>' is only dereferenced here once which involves short-lived AddRef/Release calls}}
+}
+
+void test_arrow_temporary_get_refptr_from_member_function() {
+  const RefCountedBaseHolder holder;
+  holder.GetRefCountedBase()->method_test(); // expected-warning {{performance issue: temporary 'RefPtr<RefCountedBase>' is only dereferenced here once which involves short-lived AddRef/Release calls}} expected-note {{consider changing function RefCountedBaseHolder::GetRefCountedBase to return a raw reference instead}}
+}
+
+void test_ref(RefCountedBase &aRefCountedBase);
+
+void test_star_temporary_new_refptr_function_style_cast() {
+  // TODO: Should we warn about operator* as well?
+  test_ref(*RefPtr<RefCountedBase>(new RefCountedBase()));
+}