43 lines
1.6 KiB
OCaml
43 lines
1.6 KiB
OCaml
(**************************************************************************)
|
|
(* *)
|
|
(* 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 | Iconst_blockheader n ->
|
|
n >= -0x8000_0000n && n <= 0x7FFF_FFFFn
|
|
| _ -> false
|
|
|
|
end
|
|
|
|
let fundecl f =
|
|
(new cse)#fundecl f
|