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(**************************************************************************)
(*                                                                        *)
(*                                 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"]

(** [const_*_expr expr v annot], where the expression [expr] is known to
    evaluate to the value [v], attempt to produce a more simple expression
    together with its approximation and the benefit gained by replacing [expr]
    with this new expression.  This simplification is only performed if [expr]
    is known to have no side effects.  Otherwise, [expr] itself is returned,
    with an appropriate approximation but zero benefit.

    [const_boxed_int_expr] takes an additional argument specifying the kind of
    boxed integer to which the given expression evaluates.
*)

val const_int_expr
   : Flambda.named
  -> int
  -> Flambda.named * Simple_value_approx.t * Inlining_cost.Benefit.t

val const_char_expr
   : Flambda.named
  -> char
  -> Flambda.named * Simple_value_approx.t * Inlining_cost.Benefit.t

val const_bool_expr
   : Flambda.named
  -> bool
  -> Flambda.named * Simple_value_approx.t * Inlining_cost.Benefit.t

val const_ptr_expr
   : Flambda.named
  -> int
  -> Flambda.named * Simple_value_approx.t * Inlining_cost.Benefit.t

val const_float_expr
   : Flambda.named
  -> float
  -> Flambda.named * Simple_value_approx.t * Inlining_cost.Benefit.t

val const_boxed_int_expr
   : Flambda.named
  -> 'a Simple_value_approx.boxed_int
  -> 'a
  -> Flambda.named * Simple_value_approx.t * Inlining_cost.Benefit.t

val const_comparison_expr
   : Flambda.named
  -> Lambda.comparison
  -> 'a
  -> 'a
  -> Flambda.named * Simple_value_approx.t * Inlining_cost.Benefit.t

(** Functions for transposing the order of bytes within words of various
    sizes. *)
val swap16 : int -> int
val swap32 : int32 -> int32
val swap64 : int64 -> int64
val swapnative : nativeint -> nativeint