(defknown data-vector-ref (simple-array index) t
(foldable explicit-check always-translatable))
(defknown data-vector-ref-with-offset (simple-array index fixnum) t
(foldable explicit-check always-translatable))
(defknown data-vector-set (array index t) t
(defknown data-vector-ref (simple-array index) t
(foldable explicit-check always-translatable))
(defknown data-vector-ref-with-offset (simple-array index fixnum) t
(foldable explicit-check always-translatable))
(defknown data-vector-set (array index t) t