Hint Resolve loc_arguments_acceptable: locs.
(** The offsets of [Outgoing] arguments are below [size_arguments s]. *)
Remark size_arguments_rec_above:
forall tyl ir fr ofs0,
ofs0 <= size_arguments_rec tyl ir fr ofs0.

Lemma loc_arguments_bounded:
forall (s: signature) (ofs: Z) (ty: typ),
In (S Outgoing ofs ty) (regs_of_rpairs (loc_arguments s)) ->
ofs + typesize ty <= size_arguments s.