(* The "lambda" intermediate code *)

open Asttypes
open Typedtree

type primitive =
    Pidentity
    (* Globals *)
  | Pgetglobal of Ident.t
  | Psetglobal of Ident.t
  (* Operations on heap blocks *)
  | Pmakeblock of int
  | Pfield of int
  | Psetfield of int * bool
  | Pfloatfield of int
  | Psetfloatfield of int
  (* External call *)
  | Pccall of Primitive.description
  (* Exceptions *)
  | Praise
  (* Boolean operations *)
  | Psequand | Psequor | Pnot
  (* Integer operations *)
  | Pnegint | Paddint | Psubint | Pmulint | Pdivint | Pmodint
  | Pandint | Porint | Pxorint
  | Plslint | Plsrint | Pasrint
  | Pintcomp of comparison
  | Poffsetint of int
  | Poffsetref of int
  (* Float operations *)
  | Pintoffloat | Pfloatofint
  | Pnegfloat | Paddfloat | Psubfloat | Pmulfloat | Pdivfloat
  | Pfloatcomp of comparison
  (* String operations *)
  | Pstringlength | Pstringrefu | Pstringsetu | Pstringrefs | Pstringsets
  (* Array operations *)
  | Pmakearray of array_kind
  | Parraylength of array_kind
  | Parrayrefu of array_kind
  | Parraysetu of array_kind
  | Parrayrefs of array_kind
  | Parraysets of array_kind
  (* Compaction of sparse switches *)
  | Ptranslate of (int * int * int) array

and comparison =
    Ceq | Cneq | Clt | Cgt | Cle | Cge

and array_kind =
    Pgenarray | Paddrarray | Pintarray | Pfloatarray

type structured_constant =
    Const_base of constant
  | Const_pointer of int
  | Const_block of int * structured_constant list
  | Const_float_array of string list

type lambda =
    Lvar of Ident.t
  | Lconst of structured_constant
  | Lapply of lambda * lambda list
  | Lfunction of Ident.t * lambda
  | Llet of Ident.t * lambda * lambda
  | Lletrec of (Ident.t * lambda) list * lambda
  | Lprim of primitive * lambda list
  | Lswitch of lambda * int * (int * lambda) list * int * (int * lambda) list
  | Lstaticfail
  | Lcatch of lambda * lambda
  | Ltrywith of lambda * Ident.t * lambda
  | Lifthenelse of lambda * lambda * lambda
  | Lsequence of lambda * lambda
  | Lwhile of lambda * lambda
  | Lfor of Ident.t * lambda * lambda * direction_flag * lambda
  | Lshared of lambda * int option ref

val const_unit: structured_constant
val lambda_unit: lambda
val share_lambda: lambda -> lambda
val name_lambda: lambda -> (Ident.t -> lambda) -> lambda
val name_lambda_list: lambda list -> (lambda list -> lambda) -> lambda
val is_guarded: lambda -> bool

module IdentSet: Set.S with elt = Ident.t
val free_variables: lambda -> IdentSet.t

type compilenv

val empty_env: compilenv
val add_env: Ident.t -> lambda -> compilenv -> compilenv
val transl_access: compilenv -> Ident.t -> lambda

val transl_path: Path.t -> lambda