(************************************************************************)
(*         *   The Coq Proof Assistant / The Coq Development Team       *)
(*  v      *         Copyright INRIA, CNRS and contributors             *)
(* <O___,, * (see version control and CREDITS file for authors & dates) *)
(*   \VV/  **************************************************************)
(*    //   *    This file is distributed under the terms of the         *)
(*         *     GNU Lesser General Public License Version 2.1          *)
(*         *     (see LICENSE file for the text of the license)         *)
(************************************************************************)

(* $Id$ *)

open Names
open Vmvalues
open Constr

module Label :
  sig
    type t = int
    val no : t
    val create : unit -> t
    val reset_label_counter : unit -> unit
  end

type instruction =
  | Klabel of Label.t
  | Kacc of int                         (** accu = sp[n] *)
  | Kenvacc of int                      (** accu = coq_env[n] *)
  | Koffsetclosure of int               (** accu = &coq_env[n] *)
  | Kpush                               (** sp = accu :: sp *)
  | Kpop of int                         (** sp = skipn n sp *)
  | Kpush_retaddr of Label.t            (** sp = pc :: coq_env :: coq_extra_args :: sp ; coq_extra_args = 0 *)
  | Kshort_apply of int                 (** number of arguments (arguments on top of stack) *)
  | Kapply of int                       (** number of arguments (arguments on top of stack) *)
  | Kappterm of int * int               (** number of arguments, slot size *)
  | Kreturn of int                      (** slot size *)
  | Kjump
  | Krestart
  | Kgrab of int                        (** number of arguments *)
  | Kgrabrec of int                     (** rec arg *)
  | Kclosure of Label.t * int           (** label, number of free variables *)
  | Kclosurerec of int * int * Label.t array * Label.t array
                   (** nb fv, init, lbl types, lbl bodies *)
  | Kclosurecofix of int * int * Label.t array * Label.t array
                   (** nb fv, init, lbl types, lbl bodies *)
  | Kgetglobal of Constant.t
  | Kconst of structured_constant
  | Kmakeblock of (* size: *) int * tag (** allocate an ocaml block. Index 0
                                         ** is accu, all others are popped from
                                         ** the top of the stack  *)
  | Kmakeswitchblock of Label.t * Label.t * annot_switch * int
  | Kswitch of Label.t array * Label.t array (** consts,blocks *)
  | Kpushfields of int
  | Kfield of int                       (** accu = accu[n] *)
  | Ksetfield of int                    (** accu[n] = sp[0] ; sp = pop sp *)
  | Kstop
  | Ksequence of bytecodes
  | Kproj of Projection.Repr.t
  | Kensurestackcapacity of int

  | Kbranch of Label.t                  (** jump to label, is it needed ? *)
  | Kprim of CPrimitives.t * pconstant
  | Kcamlprim of CPrimitives.t * Label.t

and bytecodes = instruction list

val pp_bytecodes : bytecodes -> Pp.t

type fv_elem =
  FVnamed of Id.t
| FVrel of int
| FVuniv_var of int
| FVevar of Evar.t

type fv = fv_elem array

val pp_fv_elem : fv_elem -> Pp.t
