(** * Memory assertions used to describe the contents of stack frames *)
Local Opaque Z.add Z.mul Z.divide.
(** Accessing the stack frame using [load_stack] and [store_stack]. *)

Lemma contains_get_stack:
forall spec m ty sp ofs,
m |= contains (chunk_of_type ty) sp ofs spec ->
exists v, load_stack m (Vptr sp Ptrofs.zero) ty (Ptrofs.repr ofs) = Some v /\ spec v.