(**************************************************************************)
(*                                                                        *)
(*                                 OCaml                                  *)
(*                                                                        *)
(*            Xavier Leroy, projet Gallium, INRIA Rocquencourt            *)
(*                          Bill O'Farrell, IBM                           *)
(*                                                                        *)
(*   Copyright 2015 Institut National de Recherche en Informatique et     *)
(*     en Automatique.                                                    *)
(*   Copyright 2015 IBM (Bill O'Farrell with help from Tristan Amini).    *)
(*                                                                        *)
(*   All rights reserved.  This file is distributed under the terms of    *)
(*   the GNU Lesser General Public License version 2.1, with the          *)
(*   special exception on linking described in the file LICENSE.          *)
(*                                                                        *)
(**************************************************************************)

(* CSE for the Z Processor *)

open Arch
open Mach
open CSEgen

class cse = object

inherit cse_generic as super

method! class_of_operation op =
  match op with
  | Ispecific(Imultaddf | Imultsubf) -> Op_pure
  | _ -> super#class_of_operation op

method! is_cheap_operation op =
  match op with
  | Iconst_int n ->
      n >= -0x8000_0000n && n <= 0x7FFF_FFFFn
  | _ -> false

end

let fundecl f =
  (new cse)#fundecl f