Change check cast entrypoint to check instance of

Reduces code size since we do not need to reload class before
calling slow path.

TODO: Delete read barriers in the check cast code since the slow
path will retry with the proper read barriers if the check fails.

Bug: 12687968
Bug: 29516974

Test: test-art-host + test-art-target with CC

Change-Id: Ia4eb9bbe3fe2d2016e44523cf0451210828d7b88
diff --git a/runtime/entrypoints/quick/quick_throw_entrypoints.cc b/runtime/entrypoints/quick/quick_throw_entrypoints.cc
index a205b17..c8ee99a 100644
--- a/runtime/entrypoints/quick/quick_throw_entrypoints.cc
+++ b/runtime/entrypoints/quick/quick_throw_entrypoints.cc
@@ -111,6 +111,14 @@
   self->QuickDeliverException();
 }
 
+extern "C" NO_RETURN void artThrowClassCastExceptionForObject(mirror::Object* obj,
+                                                              mirror::Class* dest_type,
+                                                              Thread* self)
+    REQUIRES_SHARED(Locks::mutator_lock_) {
+  DCHECK(obj != nullptr);
+  artThrowClassCastException(dest_type, obj->GetClass(), self);
+}
+
 extern "C" NO_RETURN void artThrowArrayStoreException(mirror::Object* array, mirror::Object* value,
                                                       Thread* self)
     REQUIRES_SHARED(Locks::mutator_lock_) {