Definition unOp_result_type op t :=
match op with
  | Cop.Onotbool =>match t with
                                | Tint _ _ _ => Tint IBool Signed noattr
                                | Tlong _ _ => Tint IBool Signed noattr
                                | Tpointer _ _ => Tint I32 Signed noattr
                                | Tfloat _ _ => Tint IBool Signed noattr
                                | Tarray _ _ _ => Tint IBool Signed noattr
                                | Tfunction _ _ _ => Tint IBool Signed noattr
                                | _ => Tvoid
                                end
  | Cop.Onotint => match t with
                                | Tint _ _ _ => Tint I32 Signed noattr
                                | Tlong _ _ => Tlong Signed noattr
                                | _ => Tvoid
                                end
  | Cop.Oneg => match t with
                           | Tint _ _ _ => Tint I32 Signed noattr
                           | Tlong _ _ => Tlong Signed noattr
                           | Tfloat _ _ => t
                           | _ => Tvoid
                           end
  | Cop.Oabsfloat => t
end.

Lemma tc_val_of_bool_int_type: forall b t, is_int_type t = true -> tc_val t (Val.of_bool b).