Hint Resolve inject_incr_refl val_inject_incr val_inject_list_incr.

(* Specifications: *)
Lemma val_inject_lessdef:
forall v1 v2, Val.lessdef v1 v2 <-> Val.inject (fun b => Some(b, 0)) v1 v2.
Lemma val_inject_list_lessdef:
forall vl1 vl2, Val.lessdef_list vl1 vl2 <-> Val.inject_list (fun b => Some(b, 0)) vl1 vl2.