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# 2 "asmcomp/riscv/CSE.ml"
(**************************************************************************)
(* *)
(* OCaml *)
(* *)
(* Nicolas Ojeda Bar <n.oje.bar@gmail.com> *)
(* *)
(* Copyright 2016 Institut National de Recherche en Informatique et *)
(* en Automatique. *)
(* *)
(* 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 RISC-V *)
open Arch
open Mach
open CSEgen
class cse = object (_self)
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 <= 0x7FFF_FFFFn && n >= -0x8000_0000n
| _ -> false
end
let fundecl f =
(new cse)#fundecl f
|
