Implement common super type in reference type propagation.
Currently only if both types are classes.
Change-Id: I06e98211ead56875a42bd17f099e319b107a50d4
diff --git a/runtime/mirror/class.h b/runtime/mirror/class.h
index c4339b9..3195f4f 100644
--- a/runtime/mirror/class.h
+++ b/runtime/mirror/class.h
@@ -657,6 +657,10 @@
ALWAYS_INLINE Class* GetSuperClass() SHARED_REQUIRES(Locks::mutator_lock_);
+ // Get first common super class. It will never return null.
+ // `This` and `klass` must be classes.
+ Class* GetCommonSuperClass(Handle<Class> klass) SHARED_REQUIRES(Locks::mutator_lock_);
+
void SetSuperClass(Class *new_super_class) SHARED_REQUIRES(Locks::mutator_lock_) {
// Super class is assigned once, except during class linker initialization.
Class* old_super_class = GetFieldObject<Class>(OFFSET_OF_OBJECT_MEMBER(Class, super_class_));