(** Builtin arguments. *)

Lemma eval_exprlist_append:
forall le al1 vl1 al2 vl2,
eval_exprlist ge sp e m le (exprlist_of_expr_list al1) vl1 ->
eval_exprlist ge sp e m le (exprlist_of_expr_list al2) vl2 ->
eval_exprlist ge sp e m le (exprlist_of_expr_list (al1 ++ al2)) (vl1 ++ vl2).