Definition vincl (v w: aval) : bool :=
match v, w with
| Vbot, _ => true
| I i, I j => Int.eq_dec i j
| I i, Uns p n => Int.eq_dec (Int.zero_ext n i) i && zle 0 n
| I i, Sgn p n => Int.eq_dec (Int.sign_ext n i) i && zlt 0 n
| Uns p n, Uns q m => zle n m && pincl p q
| Uns p n, Sgn q m => zlt n m && pincl p q
| Sgn p n, Sgn q m => zle n m && pincl p q
| L i, L j => Int64.eq_dec i j
| F i, F j => Float.eq_dec i j
| FS i, FS j => Float32.eq_dec i j
| Ptr p, Ptr q => pincl p q
| (Ptr p | Ifptr p | Uns p _ | Sgn p _), Ifptr q => pincl p q
| _, Ifptr _ => true
| _, _ => false
end.

Lemma vincl_ge: forall v w, vincl v w = true -> vge w v.
Definition genv_match (ge: genv) : Prop :=
(forall id b, Genv.find_symbol ge id = Some b <-> bc b = BCglob id)
/\(forall b, Plt b (Genv.genv_next ge) -> bc b <> BCinvalid /\ bc b <> BCstack).