(** Invariance by external calls *)

Lemma match_cont_extcall:
forall f cenv k tk m bound tbound tm f' m',
match_cont f cenv k tk m bound tbound ->
Mem.unchanged_on (loc_unmapped f) m m' ->
inject_incr f f' ->
inject_separated f f' m tm ->
Ple bound (Mem.nextblock m) -> Ple tbound (Mem.nextblock tm) ->
match_cont f' cenv k tk m' bound tbound.