44 lines
2.1 KiB
OCaml
44 lines
2.1 KiB
OCaml
(**************************************************************************)
|
|
(* *)
|
|
(* OCaml *)
|
|
(* *)
|
|
(* Pierre Chambart, OCamlPro *)
|
|
(* Mark Shinwell and Leo White, Jane Street Europe *)
|
|
(* *)
|
|
(* Copyright 2013--2016 OCamlPro SAS *)
|
|
(* Copyright 2014--2016 Jane Street Group LLC *)
|
|
(* *)
|
|
(* 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. *)
|
|
(* *)
|
|
(**************************************************************************)
|
|
|
|
[@@@ocaml.warning "+a-4-9-30-40-41-42"]
|
|
|
|
type lifter = Flambda.program -> Flambda.program
|
|
|
|
(** Lift [let] bindings to attempt to increase the length of scopes, as an
|
|
aid to further optimizations. For example:
|
|
let c = let b = <expr> in b, b in fst c
|
|
would be transformed to:
|
|
let b = <expr> in let c = b, b in fst c
|
|
which is then clearly just:
|
|
<expr>
|
|
*)
|
|
val lift_lets : lifter
|
|
|
|
val lift_lets_expr : Flambda.t -> toplevel:bool -> Flambda.t
|
|
|
|
(* CR-someday mshinwell: Rename to [bind]? Also see Flambda_utils.bind. *)
|
|
(* [create_body] always receives the variables corresponding to [evaluate]
|
|
in the same order. However [evaluation_order] specifies in which order
|
|
the (possibly complex) expressions bound to those variables are
|
|
evaluated. *)
|
|
val lifting_helper
|
|
: Flambda.t list
|
|
-> evaluation_order:[ `Left_to_right | `Right_to_left ]
|
|
-> create_body:(Variable.t list -> Flambda.t)
|
|
-> name:string
|
|
-> Flambda.t
|