Definition is_int32_noattr_type t :=
 match t with
 | Tint I32 _ {| attr_volatile := false; attr_alignas := None |} => True
 | _ => False
 end.

Lemma mapsto_tuint_tptr_nullval: forall sh p t, mapsto sh (Tpointer t noattr) p nullval = mapsto sh size_t p nullval.