(** Corollaries of [external_call_determ]. *)

(* Specifications: *)
Lemma external_call_match_traces:
forall ef ge vargs m t1 vres1 m1 t2 vres2 m2,
external_call ef ge vargs m t1 vres1 m1 ->
external_call ef ge vargs m t2 vres2 m2 ->
match_traces ge t1 t2.
Lemma external_call_deterministic:
forall ef ge vargs m t vres1 m1 vres2 m2,
external_call ef ge vargs m t vres1 m1 ->
external_call ef ge vargs m t vres2 m2 ->
vres1 = vres2 /\ m1 = m2.