pmodule.ml 36.8 KB
Newer Older
1 2 3
(********************************************************************)
(*                                                                  *)
(*  The Why3 Verification Platform   /   The Why3 Development Team  *)
Andrei Paskevich's avatar
Andrei Paskevich committed
4
(*  Copyright 2010-2016   --   INRIA - CNRS - Paris-Sud University  *)
5 6 7 8 9 10 11 12 13 14
(*                                                                  *)
(*  This software is distributed under the terms of the GNU Lesser  *)
(*  General Public License version 2.1, with the special exception  *)
(*  on linking described in file LICENSE.                           *)
(*                                                                  *)
(********************************************************************)

open Stdlib
open Ident
open Ty
15
open Term
Andrei Paskevich's avatar
Andrei Paskevich committed
16
open Decl
17 18 19
open Theory
open Ity
open Expr
20
open Pdecl
21 22 23 24 25 26 27 28 29 30

(** *)

type prog_symbol =
  | PV of pvsymbol
  | RS of rsymbol

type namespace = {
  ns_ts : itysymbol   Mstr.t;  (* type symbols *)
  ns_ps : prog_symbol Mstr.t;  (* program symbols *)
31
  ns_xs : xsymbol     Mstr.t;  (* exception symbols *)
32 33 34 35 36 37
  ns_ns : namespace   Mstr.t;  (* inner namespaces *)
}

let empty_ns = {
  ns_ts = Mstr.empty;
  ns_ps = Mstr.empty;
38
  ns_xs = Mstr.empty;
39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59
  ns_ns = Mstr.empty;
}

let ns_replace eq chk x vo vn =
  if not chk then vn else
  if eq vo vn then vn else
  raise (ClashSymbol x)

let psym_equal p1 p2 = match p1,p2 with
  | PV p1, PV p2 -> pv_equal p1 p2
  | RS p1, RS p2 -> rs_equal p1 p2
  | _, _ -> false

let rec merge_ns chk ns1 ns2 =
  if ns1 == ns2 then ns1 else
  let join eq x n o = Some (ns_replace eq chk x o n) in
  let ns_union eq m1 m2 =
    if m1 == m2 then m1 else Mstr.union (join eq) m1 m2 in
  let fusion _ ns1 ns2 = Some (merge_ns chk ns1 ns2) in
  { ns_ts = ns_union its_equal ns1.ns_ts ns2.ns_ts;
    ns_ps = ns_union psym_equal ns1.ns_ps ns2.ns_ps;
60
    ns_xs = ns_union xs_equal ns1.ns_xs ns2.ns_xs;
61 62 63 64 65 66 67 68 69 70
    ns_ns = Mstr.union fusion ns1.ns_ns ns2.ns_ns; }

let add_ns chk x ns m = Mstr.change (function
  | Some os -> Some (merge_ns chk ns os)
  | None    -> Some ns) x m

let ns_add eq chk x vn m = Mstr.change (function
  | Some vo -> Some (ns_replace eq chk x vo vn)
  | None    -> Some vn) x m

71
let add_xs chk x xs ns = { ns with ns_xs = ns_add xs_equal   chk x xs ns.ns_xs }
72
let add_ts chk x ts ns = { ns with ns_ts = ns_add its_equal  chk x ts ns.ns_ts }
73
let add_ps chk x ps ns = { ns with ns_ps = ns_add psym_equal chk x ps ns.ns_ps }
74 75 76 77 78 79 80 81 82
let add_ns chk x nn ns = { ns with ns_ns = add_ns            chk x nn ns.ns_ns }

let rec ns_find get_map ns = function
  | []   -> assert false
  | [a]  -> Mstr.find a (get_map ns)
  | a::l -> ns_find get_map (Mstr.find a ns.ns_ns) l

let ns_find_prog_symbol = ns_find (fun ns -> ns.ns_ps)
let ns_find_ns          = ns_find (fun ns -> ns.ns_ns)
83
let ns_find_xs          = ns_find (fun ns -> ns.ns_xs)
84 85 86 87 88 89 90 91 92 93
let ns_find_its         = ns_find (fun ns -> ns.ns_ts)

let ns_find_pv ns s = match ns_find_prog_symbol ns s with
  | PV pv -> pv | _ -> raise Not_found

let ns_find_rs ns s = match ns_find_prog_symbol ns s with
  | RS rs -> rs | _ -> raise Not_found

(** {2 Module} *)

94
type pmodule = {
Andrei Paskevich's avatar
Andrei Paskevich committed
95 96 97 98 99 100 101 102 103 104 105
  mod_theory : theory;        (* pure theory *)
  mod_units  : mod_unit list; (* module declarations *)
  mod_export : namespace;     (* exported namespace *)
  mod_known  : known_map;     (* known identifiers *)
  mod_local  : Sid.t;         (* locally declared idents *)
  mod_used   : Sid.t;         (* used modules *)
}

and mod_unit =
  | Udecl  of pdecl
  | Uuse   of pmodule
Andrei Paskevich's avatar
Andrei Paskevich committed
106
  | Uclone of mod_inst
Andrei Paskevich's avatar
Andrei Paskevich committed
107 108 109
  | Umeta  of meta * meta_arg list
  | Uscope of string * bool * mod_unit list

Andrei Paskevich's avatar
Andrei Paskevich committed
110
and mod_inst = {
Andrei Paskevich's avatar
Andrei Paskevich committed
111
  mi_mod : pmodule;
112 113
  mi_ty  : ity Mts.t;
  mi_ts  : itysymbol Mts.t;
Andrei Paskevich's avatar
Andrei Paskevich committed
114 115
  mi_ls  : lsymbol Mls.t;
  mi_pr  : prsymbol Mpr.t;
116
  mi_pk  : prop_kind Mpr.t;
117
  mi_pv  : pvsymbol Mvs.t;
Andrei Paskevich's avatar
Andrei Paskevich committed
118 119
  mi_rs  : rsymbol Mrs.t;
  mi_xs  : xsymbol Mexn.t;
120 121
}

122 123 124 125 126 127 128 129 130 131 132 133
let empty_mod_inst m = {
  mi_mod = m;
  mi_ty  = Mts.empty;
  mi_ts  = Mts.empty;
  mi_ls  = Mls.empty;
  mi_pr  = Mpr.empty;
  mi_pk  = Mpr.empty;
  mi_pv  = Mvs.empty;
  mi_rs  = Mrs.empty;
  mi_xs  = Mexn.empty;
}

134 135
(** {2 Module under construction} *)

136
type pmodule_uc = {
137
  muc_theory : theory_uc;
Andrei Paskevich's avatar
Andrei Paskevich committed
138
  muc_units  : mod_unit list;
139 140 141 142 143
  muc_import : namespace list;
  muc_export : namespace list;
  muc_known  : known_map;
  muc_local  : Sid.t;
  muc_used   : Sid.t;
Andrei Paskevich's avatar
Andrei Paskevich committed
144
  muc_env    : Env.env;
145 146 147 148
}

let empty_module env n p = {
  muc_theory = create_theory ~path:p n;
Andrei Paskevich's avatar
Andrei Paskevich committed
149
  muc_units  = [];
150 151 152 153 154 155 156 157 158 159 160 161 162
  muc_import = [empty_ns];
  muc_export = [empty_ns];
  muc_known  = Mid.empty;
  muc_local  = Sid.empty;
  muc_used   = Sid.empty;
  muc_env    = env;
}

let close_module, restore_module =
  let h = Hid.create 17 in
  (fun uc ->
     let th = close_theory uc.muc_theory in (* catches errors *)
     let m = { mod_theory = th;
Andrei Paskevich's avatar
Andrei Paskevich committed
163
               mod_units  = List.rev uc.muc_units;
164 165 166 167 168 169 170 171
               mod_export = List.hd uc.muc_export;
               mod_known  = uc.muc_known;
               mod_local  = uc.muc_local;
               mod_used   = uc.muc_used; } in
     Hid.add h th.th_name m;
     m),
  (fun th -> Hid.find h th.th_name)

172
let open_scope uc s = match uc.muc_import with
173
  | ns :: _ -> { uc with
174
      muc_theory = Theory.open_scope uc.muc_theory s;
Andrei Paskevich's avatar
Andrei Paskevich committed
175
      muc_units  = [Uscope (s, false, uc.muc_units)];
176 177 178 179
      muc_import =       ns :: uc.muc_import;
      muc_export = empty_ns :: uc.muc_export; }
  | [] -> assert false

180 181
let close_scope uc ~import =
  let th = Theory.close_scope uc.muc_theory ~import in
Andrei Paskevich's avatar
Andrei Paskevich committed
182
  match List.rev uc.muc_units, uc.muc_import, uc.muc_export with
Andrei Paskevich's avatar
Andrei Paskevich committed
183 184 185
  | [Uscope (_,_,ul1)], _ :: sti, _ :: ste -> (* empty scope *)
      { uc with muc_theory = th;  muc_units  = ul1;
                muc_import = sti; muc_export = ste; }
Andrei Paskevich's avatar
Andrei Paskevich committed
186
  | Uscope (s,_,ul1) :: ul0, _ :: i1 :: sti, e0 :: e1 :: ste ->
187 188 189 190 191
      let i1 = if import then merge_ns false e0 i1 else i1 in
      let _  = if import then merge_ns true  e0 e1 else e1 in
      let i1 = add_ns false s e0 i1 in
      let e1 = add_ns true  s e0 e1 in
      { uc with
192
          muc_theory = th;
Andrei Paskevich's avatar
Andrei Paskevich committed
193
          muc_units  = Uscope (s, import, ul0) :: ul1;
194 195
          muc_import = i1 :: sti;
          muc_export = e1 :: ste; }
Andrei Paskevich's avatar
Andrei Paskevich committed
196
  | _ -> assert false
197

Andrei Paskevich's avatar
Andrei Paskevich committed
198 199 200 201 202 203
let use_export uc ({mod_theory = mth} as m) =
  let th = Theory.use_export uc.muc_theory mth in
  let uc = if Sid.mem mth.th_name uc.muc_used then uc
    else { uc with
      muc_known = merge_known uc.muc_known m.mod_known;
      muc_used  = Sid.add mth.th_name uc.muc_used } in
204 205 206
  match uc.muc_import, uc.muc_export with
  | i0 :: sti, e0 :: ste -> { uc with
      muc_theory = th;
Andrei Paskevich's avatar
Andrei Paskevich committed
207 208 209
      muc_units  = Uuse m :: uc.muc_units;
      muc_import = merge_ns false m.mod_export i0 :: sti;
      muc_export = merge_ns true  m.mod_export e0 :: ste; }
210 211
  | _ -> assert false

Andrei Paskevich's avatar
Andrei Paskevich committed
212 213 214
let add_meta uc m al = { uc with
  muc_theory = Theory.add_meta uc.muc_theory m al;
  muc_units  = Umeta (m,al) :: uc.muc_units; }
215

216 217
let store_path, store_module, restore_path =
  let id_to_path = Wid.create 17 in
Andrei Paskevich's avatar
Andrei Paskevich committed
218
  let store_path {muc_theory = uc} path id =
219 220
    (* this symbol already belongs to some theory *)
    if Wid.mem id_to_path id then () else
Andrei Paskevich's avatar
Andrei Paskevich committed
221 222 223
    let prefix = List.rev (id.id_string :: path @ uc.uc_prefix) in
    Wid.set id_to_path id (uc.uc_path, uc.uc_name.id_string, prefix) in
  let store_module {mod_theory = {th_name = id} as th} =
224 225
    (* this symbol is already a module *)
    if Wid.mem id_to_path id then () else
Andrei Paskevich's avatar
Andrei Paskevich committed
226
    Wid.set id_to_path id (th.th_path, id.id_string, []) in
227 228 229 230 231 232 233 234
  let restore_path id = Wid.find id_to_path id in
  store_path, store_module, restore_path

let close_module uc =
  let m = close_module uc in
  store_module m;
  m

235
(*
236 237 238 239
let count_regions {muc_known = kn} {pv_ity = ity} mr =
  let add_reg r mr = Mreg.change (fun n -> Some (n <> None)) r mr in
  let meet mr1 mr2 = Mreg.union (fun _ x y -> Some (x || y)) mr1 mr2 in
  let join mr1 mr2 = Mreg.union (fun _ _ _ -> Some true) mr1 mr2 in
240
  let rec down mr ity = if ity.ity_imm then mr else
241 242 243
    match ity.ity_node with
    | Ityreg r -> fields (add_reg r mr) r.reg_its r.reg_args r.reg_regs
    | Ityapp (s,tl,rl) -> fields mr s tl rl
244
    | Ityvar _ -> assert false
245 246 247
  and fields mr s tl rl =
    if s.its_private && rl = [] then mr else
    let isb = its_match_regs s tl rl in
248 249 250 251 252 253 254 255 256 257 258
    let add_ity mr ity = down mr (ity_full_inst isb ity) in
    let add_proj mr f = add_ity mr f.rs_cty.cty_result in
    let add_field mr v = add_ity mr v.pv_ity in
    let d = find_its_defn kn s in
    if d.itd_constructors = [] then
      List.fold_left add_proj mr d.itd_fields
    else
      join mr (List.fold_left (fun mr c ->
        meet mr (List.fold_left add_field Mreg.empty c.rs_cty.cty_args))
        Mreg.empty d.itd_constructors) in
  down mr ity
259
*)
260

261 262 263 264 265 266 267 268
let add_symbol add id v uc =
  store_path uc [] id;
  match uc.muc_import, uc.muc_export with
  | i0 :: sti, e0 :: ste -> { uc with
      muc_import = add false id.id_string v i0 :: sti;
      muc_export = add true  id.id_string v e0 :: ste }
  | _ -> assert false

Andrei Paskevich's avatar
Andrei Paskevich committed
269
let add_pdecl_no_logic uc d =
270
  let uc = { uc with
Andrei Paskevich's avatar
Andrei Paskevich committed
271
    muc_units = Udecl d :: uc.muc_units;
272
    muc_known = known_add_decl uc.muc_known d;
273
    muc_local = Sid.union uc.muc_local d.pd_news } in
274
  let add_rs uc s = add_symbol add_ps s.rs_name (RS s) uc in
275
  let add_rd uc d = add_rs uc d.rec_sym in
276 277 278 279 280 281 282 283
  match d.pd_node with
  | PDtype tdl ->
      let add uc d =
        let uc = List.fold_left add_rs uc d.itd_fields in
        let uc = List.fold_left add_rs uc d.itd_constructors in
        add_symbol add_ts d.itd_its.its_ts.ts_name d.itd_its uc in
      List.fold_left add uc tdl
  | PDlet (LDvar (v,_)) -> add_symbol add_ps v.pv_vs.vs_name (PV v) uc
284
  | PDlet (LDsym (s,_)) -> add_rs uc s
285
  | PDlet (LDrec l) -> List.fold_left add_rd uc l
286
  | PDexn xs -> add_symbol add_xs xs.xs_name xs uc
287
  | PDpure -> uc
288

Andrei Paskevich's avatar
Andrei Paskevich committed
289 290
let add_pdecl uc d =
  let uc = add_pdecl_no_logic uc d in
291
  let th = List.fold_left add_decl uc.muc_theory d.pd_pure in
Andrei Paskevich's avatar
Andrei Paskevich committed
292 293
  { uc with muc_theory = th }

294 295
(** {2 Builtin symbols} *)

Andrei Paskevich's avatar
Andrei Paskevich committed
296 297
let dummy_env = Env.create_env []

298
let builtin_module =
Andrei Paskevich's avatar
Andrei Paskevich committed
299 300 301 302
  let uc = empty_module dummy_env (id_fresh "BuiltIn") ["why3";"BuiltIn"] in
  let uc = add_pdecl_no_logic uc pd_int in
  let uc = add_pdecl_no_logic uc pd_real in
  let uc = add_pdecl_no_logic uc pd_equ in
303 304
  let m = close_module uc in
  { m with mod_theory = builtin_theory }
305 306

let bool_module =
Andrei Paskevich's avatar
Andrei Paskevich committed
307 308
  let uc = empty_module dummy_env (id_fresh "Bool") ["why3";"Bool"] in
  let uc = add_pdecl_no_logic uc pd_bool in
309 310
  let m = close_module uc in
  { m with mod_theory = bool_theory }
311 312

let highord_module =
Andrei Paskevich's avatar
Andrei Paskevich committed
313 314 315
  let uc = empty_module dummy_env (id_fresh "HighOrd") ["why3";"HighOrd"] in
  let uc = add_pdecl_no_logic uc pd_func in
  let uc = add_pdecl_no_logic uc pd_func_app in
316 317
  let m = close_module uc in
  { m with mod_theory = highord_theory }
318

319 320
let tuple_module = Hint.memo 17 (fun n ->
  let nm = "Tuple" ^ string_of_int n in
Andrei Paskevich's avatar
Andrei Paskevich committed
321 322
  let uc = empty_module dummy_env (id_fresh nm) ["why3";nm] in
  let uc = add_pdecl_no_logic uc (pd_tuple n) in
323 324
  let m = close_module uc in
  { m with mod_theory = tuple_theory n })
325 326

let unit_module =
Andrei Paskevich's avatar
Andrei Paskevich committed
327
  let uc = empty_module dummy_env (id_fresh "Unit") ["why3";"Unit"] in
328
  let uc = use_export uc (tuple_module 0) in
329
  let td = create_alias_decl (id_fresh "unit") [] ity_unit in
Andrei Paskevich's avatar
Andrei Paskevich committed
330
  close_module (add_pdecl uc (create_type_decl [td]))
331 332

let create_module env ?(path=[]) n =
Andrei Paskevich's avatar
Andrei Paskevich committed
333
  let m = empty_module env n path in
334 335 336 337 338
  let m = use_export m builtin_module in
  let m = use_export m bool_module in
  let m = use_export m unit_module in
  m

Andrei Paskevich's avatar
Andrei Paskevich committed
339 340 341 342 343 344 345
let add_use uc d = Sid.fold (fun id uc ->
  if id_equal id ts_func.ts_name then
    use_export uc highord_module
  else match is_ts_tuple_id id with
  | Some n -> use_export uc (tuple_module n)
  | None -> uc) (Mid.set_diff d.pd_syms uc.muc_known) uc

346
let add_pdecl ~vc uc d =
Andrei Paskevich's avatar
Andrei Paskevich committed
347 348
  let uc = add_use uc d in
  let dl = if vc then Vc.vc uc.muc_env uc.muc_known d else [] in
349 350 351 352 353
  (* verification conditions must not add additional dependencies
     on built-in theories like TupleN or HighOrd. Also, we expect
     int.Int or any other library theory to be in the context:
     importing them automatically seems to be too invasive. *)
  add_pdecl (List.fold_left add_pdecl uc dl) d
354

Andrei Paskevich's avatar
Andrei Paskevich committed
355 356 357 358
(** {2 Cloning} *)

type clones = {
  cl_local : Sid.t;
359 360
  mutable ty_table : ity Mts.t;
  mutable ts_table : itysymbol Mts.t;
Andrei Paskevich's avatar
Andrei Paskevich committed
361 362 363
  mutable ls_table : lsymbol Mls.t;
  mutable pr_table : prsymbol Mpr.t;
  mutable rn_table : region Mreg.t;
364
  mutable fd_table : pvsymbol Mpv.t;
365
  mutable pv_table : pvsymbol Mvs.t;
Andrei Paskevich's avatar
Andrei Paskevich committed
366 367 368 369
  mutable rs_table : rsymbol Mrs.t;
  mutable xs_table : xsymbol Mexn.t;
}

370 371
let empty_clones m = {
  cl_local = m.mod_local;
372
  ty_table = Mts.empty;
Andrei Paskevich's avatar
Andrei Paskevich committed
373 374 375 376
  ts_table = Mts.empty;
  ls_table = Mls.empty;
  pr_table = Mpr.empty;
  rn_table = Mreg.empty;
377
  fd_table = Mpv.empty;
378
  pv_table = Mvs.empty;
Andrei Paskevich's avatar
Andrei Paskevich committed
379 380 381 382 383 384
  rs_table = Mrs.empty;
  xs_table = Mexn.empty;
}

(* populate the clone structure *)

385
let rec sm_trans_ty tym tsm ty = match ty.ty_node with
386
  | Tyapp (s, tl) ->
387
      let tl = List.map (sm_trans_ty tym tsm) tl in
388
      begin match Mts.find_opt s tsm with
389 390
      | Some its -> ty_app its.its_ts tl
      | None -> begin match Mts.find_opt s tym with
391 392
      | Some ity -> ty_inst (ts_match_args s tl) (ty_of_ity ity)
      | None -> ty_app s tl
393
      end end
394 395
  | Tyvar _ -> ty

Andrei Paskevich's avatar
Andrei Paskevich committed
396
let clone_ty cl ty = sm_trans_ty cl.ty_table cl.ts_table ty
397

398 399 400
let cl_find_its cl its =
  if not (Sid.mem its.its_ts.ts_name cl.cl_local) then its
  else Mts.find its.its_ts cl.ts_table
401

402 403 404
let cl_find_ts cl ts =
  if not (Sid.mem ts.ts_name cl.cl_local) then ts
  else (Mts.find ts cl.ts_table).its_ts
405

Andrei Paskevich's avatar
Andrei Paskevich committed
406
let rec clone_ity cl ity = match ity.ity_node with
407
  | Ityreg r ->
Andrei Paskevich's avatar
Andrei Paskevich committed
408
      ity_reg (clone_reg cl r)
409
  | Ityapp (s, tl, rl) ->
Andrei Paskevich's avatar
Andrei Paskevich committed
410
      let tl = List.map (clone_ity cl) tl in
411
      let rl = List.map (clone_ity cl) rl in
412
      begin match Mts.find_opt s.its_ts cl.ts_table with
413 414 415
      | Some its -> ity_app_pure its tl rl
      | None -> (* creative indentation *)
      begin match Mts.find_opt s.its_ts cl.ty_table with
416
      | Some ity -> ity_full_inst (its_match_regs s tl rl) ity
417
      | None -> ity_app_pure s tl rl
418
      end end
Andrei Paskevich's avatar
Andrei Paskevich committed
419 420
  | Ityvar _ -> ity

Andrei Paskevich's avatar
Andrei Paskevich committed
421
and clone_reg cl reg =
422 423 424 425 426
  (* FIXME: what about top-level non-instantiated regions?
     We cannot check in cl.cl_local to see if they are there.
     Instead, we should prefill cl.pv_table and cl.rn_table
     with all top-level pvsymbols (local or external) before
     descending into a let_defn. *)
Andrei Paskevich's avatar
Andrei Paskevich committed
427
  try Mreg.find reg cl.rn_table with Not_found ->
Andrei Paskevich's avatar
Andrei Paskevich committed
428
  let tl = List.map (clone_ity cl) reg.reg_args in
429
  let rl = List.map (clone_ity cl) reg.reg_regs in
430
  let r = match Mts.find_opt reg.reg_its.its_ts cl.ts_table with
431 432
    | Some its ->
        create_region (id_clone reg.reg_name) its tl rl
433 434
    | None -> (* creative indentation *)
    begin match Mts.find_opt reg.reg_its.its_ts cl.ty_table with
435 436 437
    | Some {ity_node = Ityreg r} ->
        let sbs = its_match_regs reg.reg_its tl rl in
        let tl = List.map (ity_full_inst sbs) r.reg_args in
438
        let rl = List.map (ity_full_inst sbs) r.reg_regs in
439
        create_region (id_clone reg.reg_name) r.reg_its tl rl
440
    | Some _ -> assert false
441 442
    | None ->
        create_region (id_clone reg.reg_name) reg.reg_its tl rl
443
    end in
444 445
  cl.rn_table <- Mreg.add reg r cl.rn_table;
  r
Andrei Paskevich's avatar
Andrei Paskevich committed
446 447 448

let cl_find_ls cl ls =
  if not (Sid.mem ls.ls_name cl.cl_local) then ls
449
  else Mls.find ls cl.ls_table
Andrei Paskevich's avatar
Andrei Paskevich committed
450

Andrei Paskevich's avatar
Andrei Paskevich committed
451
let clone_term cl mv t = t_gen_map (clone_ty cl) (cl_find_ls cl) mv t
452

Andrei Paskevich's avatar
Andrei Paskevich committed
453
let clone_fmla cl f = clone_term cl Mvs.empty f (* for closed terms *)
Andrei Paskevich's avatar
Andrei Paskevich committed
454

Andrei Paskevich's avatar
Andrei Paskevich committed
455
let cl_find_pr cl pr =
Andrei Paskevich's avatar
Andrei Paskevich committed
456
  if not (Sid.mem pr.pr_name cl.cl_local) then pr
457
  else Mpr.find pr cl.pr_table
Andrei Paskevich's avatar
Andrei Paskevich committed
458

Andrei Paskevich's avatar
Andrei Paskevich committed
459
let cl_find_pv cl pv =
Andrei Paskevich's avatar
Andrei Paskevich committed
460
  if not (Sid.mem pv.pv_vs.vs_name cl.cl_local) then pv
461
  else Mvs.find pv.pv_vs cl.pv_table
Andrei Paskevich's avatar
Andrei Paskevich committed
462

Andrei Paskevich's avatar
Andrei Paskevich committed
463
let cl_find_rs cl rs =
Andrei Paskevich's avatar
Andrei Paskevich committed
464 465 466
  if not (Sid.mem rs.rs_name cl.cl_local) then rs
  else Mrs.find rs cl.rs_table

Andrei Paskevich's avatar
Andrei Paskevich committed
467
let cl_find_xs cl xs =
Andrei Paskevich's avatar
Andrei Paskevich committed
468 469 470
  if not (Sid.mem xs.xs_name cl.cl_local) then xs
  else Mexn.find xs cl.xs_table

Andrei Paskevich's avatar
Andrei Paskevich committed
471
let clone_ls inst cl ls =
472
  if Mls.mem ls inst.mi_ls then raise (CannotInstantiate ls.ls_name);
Andrei Paskevich's avatar
Andrei Paskevich committed
473
  let constr = ls.ls_constr in
474
  let id = id_clone ls.ls_name in
Andrei Paskevich's avatar
Andrei Paskevich committed
475 476
  let at = List.map (clone_ty cl) ls.ls_args in
  let vt = Opt.map (clone_ty cl) ls.ls_value in
Andrei Paskevich's avatar
Andrei Paskevich committed
477 478 479 480
  let ls' = create_lsymbol ~constr id at vt in
  cl.ls_table <- Mls.add ls ls' cl.ls_table;
  ls'

481 482
let cl_init_ty cl ({ts_name = id} as ts) ity =
  let its = restore_its ts in
483 484
  if not (Sid.mem id cl.cl_local) then raise (NonLocal id);
  let stv = Stv.of_list ts.ts_args in
485 486
  if not (Stv.subset (ity_freevars Stv.empty ity) stv &&
    its_pure its && ity_immutable ity) then raise (BadInstance id);
487 488
  cl.ty_table <- Mts.add ts ity cl.ty_table

489 490
let cl_init_ts cl ({ts_name = id} as ts) its' =
  let its = restore_its ts and ts' = its'.its_ts in
491
  if not (Sid.mem id cl.cl_local) then raise (NonLocal id);
492 493
  if not (List.length ts.ts_args = List.length ts'.ts_args &&
    its_pure its && its_pure its') then raise (BadInstance id);
494 495 496 497
  cl.ts_table <- Mts.add its.its_ts its' cl.ts_table

let cl_init_ls cl ({ls_name = id} as ls) ls' =
  if not (Sid.mem id cl.cl_local) then raise (NonLocal id);
Andrei Paskevich's avatar
Andrei Paskevich committed
498
  let mtch sb ty ty' = try ty_match sb ty' (clone_ty cl ty)
499
    with TypeMismatch _ -> raise (BadInstance id) in
Andrei Paskevich's avatar
Andrei Paskevich committed
500
  let sbs = match ls.ls_value,ls'.ls_value with
Andrei Paskevich's avatar
Andrei Paskevich committed
501 502
    | Some ty, Some ty' -> mtch Mtv.empty ty ty'
    | None, None -> Mtv.empty
503
    | _ -> raise (BadInstance id) in
Andrei Paskevich's avatar
Andrei Paskevich committed
504
  ignore (try List.fold_left2 mtch sbs ls.ls_args ls'.ls_args
505
    with Invalid_argument _ -> raise (BadInstance id));
Andrei Paskevich's avatar
Andrei Paskevich committed
506 507
  cl.ls_table <- Mls.add ls ls' cl.ls_table

508 509 510 511 512
let cl_init_pr cl {pr_name = id} _ =
  if not (Sid.mem id cl.cl_local) then raise (NonLocal id)

let cl_init m inst =
  let cl = empty_clones m in
513 514 515 516
  Mts.iter (cl_init_ty cl) inst.mi_ty;
  Mts.iter (cl_init_ts cl) inst.mi_ts;
  Mls.iter (cl_init_ls cl) inst.mi_ls;
  Mpr.iter (cl_init_pr cl) inst.mi_pk;
517
  cl
Andrei Paskevich's avatar
Andrei Paskevich committed
518 519 520

(* clone declarations *)

Andrei Paskevich's avatar
Andrei Paskevich committed
521
let clone_decl inst cl uc d = match d.d_node with
522
  | Dtype _ | Ddata _ -> assert false (* impossible *)
Andrei Paskevich's avatar
Andrei Paskevich committed
523
  | Dparam ls ->
524
      if Mls.mem ls inst.mi_ls then uc else
Andrei Paskevich's avatar
Andrei Paskevich committed
525
      let d = create_param_decl (clone_ls inst cl ls) in
Andrei Paskevich's avatar
Andrei Paskevich committed
526 527
      add_pdecl ~vc:false uc (create_pure_decl d)
  | Dlogic ldl ->
Andrei Paskevich's avatar
Andrei Paskevich committed
528
      let get_ls (ls,_) = ignore (clone_ls inst cl ls) in
Andrei Paskevich's avatar
Andrei Paskevich committed
529
      let get_logic (_,ld) =
Andrei Paskevich's avatar
Andrei Paskevich committed
530
        Opt.get (ls_defn_of_axiom (clone_fmla cl (ls_defn_axiom ld))) in
Andrei Paskevich's avatar
Andrei Paskevich committed
531 532 533 534
      List.iter get_ls ldl;
      let d = create_logic_decl (List.map get_logic ldl) in
      add_pdecl ~vc:false uc (create_pure_decl d)
  | Dind (s, idl) ->
Andrei Paskevich's avatar
Andrei Paskevich committed
535
      let get_ls (ls,_) = clone_ls inst cl ls in
Andrei Paskevich's avatar
Andrei Paskevich committed
536
      let get_case (pr,f) =
537
        if Mpr.mem pr inst.mi_pk then raise (CannotInstantiate pr.pr_name);
Andrei Paskevich's avatar
Andrei Paskevich committed
538 539
        let pr' = create_prsymbol (id_clone pr.pr_name) in
        cl.pr_table <- Mpr.add pr pr' cl.pr_table;
Andrei Paskevich's avatar
Andrei Paskevich committed
540
        pr', clone_fmla cl f in
Andrei Paskevich's avatar
Andrei Paskevich committed
541 542 543 544 545
      let get_ind ls (_,la) = ls, List.map get_case la in
      let lls = List.map get_ls idl in
      let d = create_ind_decl s (List.map2 get_ind lls idl) in
      add_pdecl ~vc:false uc (create_pure_decl d)
  | Dprop (k,pr,f) ->
546
      let skip, k' = match k, Mpr.find_opt pr inst.mi_pk with
547 548 549 550 551
        | Pgoal, _ -> true, Pgoal
        | Plemma, Some Pgoal -> true, Pgoal
        | Plemma, _ -> false, Plemma
        | Paxiom, Some k -> false, k
        | Paxiom, None -> false, Paxiom (* TODO: Plemma *) in
Andrei Paskevich's avatar
Andrei Paskevich committed
552
      if skip then uc else
Andrei Paskevich's avatar
Andrei Paskevich committed
553 554
      let pr' = create_prsymbol (id_clone pr.pr_name) in
      cl.pr_table <- Mpr.add pr pr' cl.pr_table;
Andrei Paskevich's avatar
Andrei Paskevich committed
555
      let d = create_prop_decl k' pr' (clone_fmla cl f) in
Andrei Paskevich's avatar
Andrei Paskevich committed
556 557
      add_pdecl ~vc:false uc (create_pure_decl d)

558 559 560
let cl_save_ls cl s s' =
  cl.ls_table <- Mls.add_new (CannotInstantiate s.ls_name) s s' cl.ls_table

561 562 563
let cl_save_rs cl s s' =
  cl.rs_table <- Mrs.add s s' cl.rs_table;
  begin match s.rs_field, s'.rs_field with
564 565 566
  | Some v, Some v' -> cl.fd_table <- Mpv.add v v' cl.fd_table
  | None, _ -> () (* can instantiate a non-field with a field *)
  | _ -> assert false (* but not vice versa *)
567 568
  end;
  match s.rs_logic, s'.rs_logic with
569
  | RLls s, RLls s' -> cl_save_ls cl s s'
570 571 572 573
  | RLlemma, RLlemma -> () (* TODO: update cl.pr_table? *)
  | RLnone, RLnone -> ()
  | _ -> assert false

574 575 576 577 578 579 580 581 582
let clone_type_decl inst cl tdl =
  let def =
    List.fold_left (fun m d -> Mits.add d.itd_its d m) Mits.empty tdl in
  let htd = Hits.create 5 in

  let rec visit alg ({its_ts = {ts_name = id} as ts} as s) d =
    if not (Hits.mem htd s) then
    let alg = Sits.add s alg in
    let id' = id_clone id in
583
    let cloned = Mts.mem ts inst.mi_ts || Mts.mem ts inst.mi_ty in
584 585 586
    let conv_pj v = create_pvsymbol
      (id_clone v.pv_vs.vs_name) ~ghost:v.pv_ghost (conv_ity alg v.pv_ity) in
    let save_itd itd =
587 588
      List.iter2 (cl_save_rs cl) d.itd_constructors itd.itd_constructors;
      List.iter2 (cl_save_rs cl) d.itd_fields itd.itd_fields;
589 590 591 592 593 594 595 596 597 598 599 600 601
      Hits.add htd s (Some itd) in
    (* alias *)
    if s.its_def <> None then begin
      if cloned then raise (CannotInstantiate id);
      let def = conv_ity alg (Opt.get s.its_def) in
      let itd = create_alias_decl id' ts.ts_args def in
      cl.ts_table <- Mts.add ts itd.itd_its cl.ts_table;
      save_itd itd
    end else
    (* abstract *)
    if d.itd_fields = [] && d.itd_constructors = [] &&
                            d.itd_invariant = [] then begin
      if cloned then Hits.add htd s None else begin
602 603
        let itd = create_plain_record_decl id' ts.ts_args
          ~priv:s.its_private ~mut:s.its_mutable [] [] in
604 605 606 607 608
        cl.ts_table <- Mts.add ts itd.itd_its cl.ts_table;
        save_itd itd
      end
    end else
    (* variant *)
609 610
    if not s.its_mutable && d.itd_constructors <> [] &&
                            d.itd_invariant = [] then begin
611 612 613 614 615 616 617 618 619 620 621 622 623 624
      if cloned then raise (CannotInstantiate id);
      let conv_fd m fd =
        let v = Opt.get fd.rs_field in Mpv.add v (conv_pj v) m in
      let fldm = List.fold_left conv_fd Mpv.empty d.itd_fields in
      let conv_pj pj = match Mpv.find_opt pj fldm with
        | Some pj' -> true, pj' | None -> false, conv_pj pj in
      let conv_cs cs =
        id_clone cs.rs_name, List.map conv_pj cs.rs_cty.cty_args in
      let csl = List.map conv_cs d.itd_constructors in
      match Mts.find_opt ts cl.ts_table with
      | Some s' ->
          let itd = create_rec_variant_decl s' csl in
          save_itd itd
      | None ->
625
          let itd = create_plain_variant_decl id' ts.ts_args csl in
626 627 628 629 630 631 632 633 634 635
          cl.ts_table <- Mts.add ts itd.itd_its cl.ts_table;
          save_itd itd
    end else begin
    (* flat record *)
      if cloned then raise (CannotInstantiate id);
      let mfld = Spv.of_list s.its_mfields in
      let pjl = List.map (fun fd -> Opt.get fd.rs_field) d.itd_fields in
      let fdl = List.map (fun v -> Spv.mem v mfld, conv_pj v) pjl in
      let inv =
        if d.itd_invariant = [] then [] else
636 637
        let add mv u (_,v) = Mvs.add u.pv_vs v.pv_vs mv in
        let mv = List.fold_left2 add Mvs.empty pjl fdl in
Andrei Paskevich's avatar
Andrei Paskevich committed
638
        List.map (clone_term cl mv) d.itd_invariant in
639 640
      let itd = create_plain_record_decl id' ts.ts_args
        ~priv:s.its_private ~mut:s.its_mutable fdl inv in
641 642 643 644 645 646 647
      cl.ts_table <- Mts.add ts itd.itd_its cl.ts_table;
      save_itd itd
    end

  and conv_ity alg ity =
    let rec down ity = match ity.ity_node with
      | Ityreg {reg_its = s; reg_args = tl}
648
      | Ityapp (s,tl,_) ->
649 650 651
          if Sits.mem s alg then begin
            if not (Mts.mem s.its_ts cl.ts_table) then
            let id = id_clone s.its_ts.ts_name in
652 653
            let s' = create_rec_itysymbol id s.its_ts.ts_args in
            cl.ts_table <- Mts.add s.its_ts s' cl.ts_table
654 655 656 657
          end else Opt.iter (visit alg s) (Mits.find_opt s def);
          List.iter down tl
      | Ityvar _ -> () in
    down ity;
Andrei Paskevich's avatar
Andrei Paskevich committed
658
    clone_ity cl ity in
659 660 661 662

  Mits.iter (visit Sits.empty) def;
  Lists.map_filter (fun d -> Hits.find htd d.itd_its) tdl

663 664 665 666 667 668 669 670 671 672 673
type smap = {
  sm_vs : vsymbol Mvs.t;
  sm_pv : pvsymbol Mvs.t;
  sm_rs : rsymbol Mrs.t;
}

let sm_of_cl cl = {
  sm_vs = Mvs.map (fun v -> v.pv_vs) cl.pv_table;
  sm_pv = cl.pv_table;
  sm_rs = cl.rs_table }

674 675 676 677 678
let sm_save_vs sm v v' = {
  sm_vs = Mvs.add v v'.pv_vs sm.sm_vs;
  sm_pv = Mvs.add v v' sm.sm_pv;
  sm_rs = sm.sm_rs }

679 680 681 682 683 684 685 686
let sm_save_pv sm v v' = {
  sm_vs = Mvs.add v.pv_vs v'.pv_vs sm.sm_vs;
  sm_pv = Mvs.add v.pv_vs v' sm.sm_pv;
  sm_rs = sm.sm_rs }

let sm_save_rs cl sm s s' =
  let sm = { sm with sm_rs = Mrs.add s s' sm.sm_rs } in
  match s.rs_logic, s'.rs_logic with
687
  | RLls s, RLls s' -> cl_save_ls cl s s'; sm
688 689 690
  | RLpv v, RLpv v' -> sm_save_pv sm v v'
  | _ -> sm

691 692 693
let sm_find_pv sm v = Mvs.find_def v v.pv_vs sm.sm_pv
  (* non-instantiated global variables are not in sm *)

694
let clone_pv cl {pv_vs = vs; pv_ity = ity; pv_ghost = ghost} =
Andrei Paskevich's avatar
Andrei Paskevich committed
695
  create_pvsymbol (id_clone vs.vs_name) ~ghost (clone_ity cl ity)
696 697

let clone_invl cl sm invl =
Andrei Paskevich's avatar
Andrei Paskevich committed
698
  List.map (fun t -> clone_term cl sm.sm_vs t) invl
699

700
let clone_varl cl sm varl = List.map (fun (t,r) ->
Andrei Paskevich's avatar
Andrei Paskevich committed
701
  clone_term cl sm.sm_vs t, Opt.map (cl_find_ls cl) r) varl
702

703
let clone_cty cl sm ?(drop_decr=false) cty =
704
  let res = clone_ity cl cty.cty_result in
705
  let args = List.map (clone_pv cl) cty.cty_args in
706
  let sm_args = List.fold_left2 sm_save_pv sm cty.cty_args args in
707
  let add_old o n (sm, olds) = let o' = clone_pv cl o in
708
    sm_save_pv sm o o', Mpv.add o' (sm_find_pv sm_args n) olds in
709
  let sm_olds, olds = Mpv.fold add_old cty.cty_oldies (sm_args, Mpv.empty) in
710 711
  let pre = if drop_decr then List.tl cty.cty_pre else cty.cty_pre in
  let pre = clone_invl cl sm_args pre in
712 713 714 715 716
  let post = clone_invl cl sm_olds cty.cty_post in
  let xpost = Mexn.fold (fun xs fl q ->
    let xs = cl_find_xs cl xs in
    let fl = clone_invl cl sm_olds fl in
    Mexn.add xs fl q) cty.cty_xpost Mexn.empty in
717
  let add_read v s = Spv.add (sm_find_pv sm_args v) s in
718 719 720
  let reads = Spv.fold add_read (cty_reads cty) Spv.empty in
  let reads = List.fold_right add_read cty.cty_args reads in
  let reads = Spv.union reads (Mpv.domain olds) in
721
  let add_write reg fs m =
722
    let add_fd fd s = Spv.add (Mpv.find_def fd fd cl.fd_table) s in
Andrei Paskevich's avatar
Andrei Paskevich committed
723
    Mreg.add (clone_reg cl reg) (Spv.fold add_fd fs Spv.empty) m in
724
  let writes = Mreg.fold add_write cty.cty_effect.eff_writes Mreg.empty in
Andrei Paskevich's avatar
Andrei Paskevich committed
725
  let add_reset reg s = Sreg.add (clone_reg cl reg) s in
726 727 728 729 730
  let resets = Sreg.fold add_reset cty.cty_effect.eff_resets Sreg.empty in
  let eff = eff_reset (eff_write reads writes) resets in
  let add_raise xs eff = eff_raise eff (cl_find_xs cl xs) in
  let eff = Sexn.fold add_raise cty.cty_effect.eff_raises eff in
  let eff = if cty.cty_effect.eff_oneway then eff_diverge eff else eff in
731 732
  let cty = create_cty ~mask:cty.cty_mask args pre post xpost olds eff res in
  cty_ghostify (cty_ghost cty) cty
733 734 735 736 737

let sm_save_args sm c c' =
  List.fold_left2 sm_save_pv sm c.cty_args c'.cty_args

let sm_save_olds sm c c' =
738 739
  let revs = Mpv.fold (fun o n m -> Mpv.add n o m) c'.cty_oldies Mpv.empty in
  let add_old o n sm = sm_save_pv sm o (Mpv.find (sm_find_pv sm n) revs) in
740 741 742 743 744 745 746 747 748
  Mpv.fold add_old c.cty_oldies sm

let rs_kind s = match s.rs_logic with
  | RLnone -> RKnone
  | RLpv _ -> RKlocal
  | RLls { ls_value = None } -> RKpred
  | RLls _ -> RKfunc
  | RLlemma -> RKlemma

749
let clone_ppat cl sm pp mask =
750 751
  let rec conv_pat p = match p.pat_node with
    | Term.Pwild -> PPwild
752 753 754
    | Term.Pvar v -> PPvar (id_clone v.vs_name, (restore_pv v).pv_ghost)
    | Term.Pas (p,v) ->
        PPas (conv_pat p, id_clone v.vs_name, (restore_pv v).pv_ghost)
755 756 757 758
    | Term.Por (p1,p2) -> PPor (conv_pat p1, conv_pat p2)
    | Term.Papp (s,pl) ->
        PPapp (restore_rs (cl_find_ls cl s), List.map conv_pat pl) in
  let pre = conv_pat pp.pp_pat in
759
  let vm, pp' = create_prog_pattern pre (clone_ity cl pp.pp_ity) mask in
760 761 762
  let save v sm = sm_save_vs sm v (Mstr.find v.vs_name.id_string vm) in
  Svs.fold save pp.pp_pat.pat_vars sm, pp'

763
let rec clone_expr cl sm e = e_label_copy e (match e.e_node with
764
  | Evar v -> e_var (sm_find_pv sm v)
765
  | Econst c -> e_const c
766
  | Eexec (c,_) -> e_exec (clone_cexp cl sm c)
767 768 769 770
  | Eassign asl ->
      let conv (r,f,v) =
        e_var (sm_find_pv sm r), cl_find_rs cl f, e_var (sm_find_pv sm v) in
      e_assign (List.map conv asl)
771 772 773 774 775
  | Elet (ld, e) ->
      let sm, ld = clone_let_defn cl sm ld in
      e_let ld (clone_expr cl sm e)
  | Eif (e1, e2, e3) ->
      e_if (clone_expr cl sm e1) (clone_expr cl sm e2) (clone_expr cl sm e3)
776
  | Ecase (d, bl) ->
777
      let d = clone_expr cl sm d in
778
      let conv_br (pp, e) =
779
        let sm, pp = clone_ppat cl sm pp d.e_mask in
780
        pp, clone_expr cl sm e in
781
      e_case d (List.map conv_br bl)
782 783 784 785 786 787 788 789 790 791
  | Ewhile (c,invl,varl,e) ->
      e_while (clone_expr cl sm c) (clone_invl cl sm invl)
              (clone_varl cl sm varl) (clone_expr cl sm e)
  | Efor (i, (f,dir,t), invl, e) ->
      let i' = clone_pv cl i in
      let ism = sm_save_pv sm i i' in
      e_for i'
        (e_var (sm_find_pv sm f)) dir (e_var (sm_find_pv sm t))
        (clone_invl cl ism invl) (clone_expr cl ism e)
  | Etry (d, xl) ->
792 793 794 795 796
      let conv_br xs (vl, e) m =
        let vl' = List.map (clone_pv cl) vl in
        let sm = List.fold_left2 sm_save_pv sm vl vl' in
        Mexn.add (cl_find_xs cl xs) (vl', clone_expr cl sm e) m in
      e_try (clone_expr cl sm d) (Mexn.fold conv_br xl Mexn.empty)
797
  | Eraise (xs, e) ->
Andrei Paskevich's avatar
Andrei Paskevich committed
798
      e_raise (cl_find_xs cl xs) (clone_expr cl sm e) (clone_ity cl e.e_ity)
799
  | Eassert (k, f) ->
Andrei Paskevich's avatar
Andrei Paskevich committed
800
      e_assert k (clone_term cl sm.sm_vs f)
801 802
  | Eghost e ->
      e_ghostify true (clone_expr cl sm e)
803
  | Epure t ->
Andrei Paskevich's avatar
Andrei Paskevich committed
804
      e_pure (clone_term cl sm.sm_vs t)
805
  | Eabsurd -> e_absurd (clone_ity cl e.e_ity))
806

807
and clone_cexp cl sm c = match c.c_node with
808
  | Capp (s,vl) ->
809
      let vl = List.map (fun v -> sm_find_pv sm v) vl in
Andrei Paskevich's avatar
Andrei Paskevich committed
810 811
      let al = List.map (fun v -> clone_ity cl v.pv_ity) c.c_cty.cty_args in
      let res = clone_ity cl c.c_cty.cty_result in
812
      c_app (Mrs.find_def s s sm.sm_rs) vl al res
813 814 815 816 817
  | Cpur (s,vl) ->
      let vl = List.map (fun v -> sm_find_pv sm v) vl in
      let al = List.map (fun v -> clone_ity cl v.pv_ity) c.c_cty.cty_args in
      let res = clone_ity cl c.c_cty.cty_result in
      c_pur (cl_find_ls cl s) vl al res
818 819 820 821
  | Cfun e ->
      let cty = clone_cty cl sm c.c_cty in
      let sm = sm_save_args sm c.c_cty cty in
      let sm = sm_save_olds sm c.c_cty cty in
822 823
      c_fun ~mask:cty.cty_mask cty.cty_args cty.cty_pre
        cty.cty_post cty.cty_xpost cty.cty_oldies (clone_expr cl sm e)
824
  | Cany ->
825
      c_any (clone_cty cl sm c.c_cty)
826 827 828 829

and clone_let_defn cl sm ld = match ld with
  | LDvar (v,e) ->
      let e' = clone_expr cl sm e in
830 831
      let id = id_clone v.pv_vs.vs_name in
      let ld, v' = let_var id ~ghost:v.pv_ghost e' in
832 833 834 835 836 837 838
      sm_save_pv sm v v', ld
  | LDsym (s,c) ->
      let c' = clone_cexp cl sm c in
      let ld, s' = let_sym (id_clone s.rs_name)
        ~ghost:(rs_ghost s) ~kind:(rs_kind s) c' in
      sm_save_rs cl sm s s', ld
  | LDrec rdl ->
839 840 841
      let conv_rs mrs {rec_rsym = {rs_name = id} as rs; rec_varl = varl} =
        let cty = clone_cty cl sm ~drop_decr:(varl <> []) rs.rs_cty in
        let rs' = create_rsymbol (id_clone id) ~ghost:(rs_ghost rs) cty in
842 843 844 845 846 847 848 849 850 851
        Mrs.add rs rs' mrs, rs' in
      let mrs, rsyml = Lists.map_fold_left conv_rs sm.sm_rs rdl in
      let rsm = { sm with sm_rs = mrs } in
      let conv_rd ({rec_fun = c} as rd) ({rs_cty = cty} as rs) =
        let rsm = sm_save_args rsm c.c_cty cty in
        let varl = clone_varl cl rsm rd.rec_varl in
        let rsm = sm_save_olds rsm c.c_cty cty in
        let e = match c.c_node with
          | Cfun e -> clone_expr cl rsm e
          | _ -> assert false (* can't be *) in
852
        let c = c_fun ~mask:c.c_cty.cty_mask cty.cty_args
853
          cty.cty_pre cty.cty_post cty.cty_xpost cty.cty_oldies e in
854 855 856 857 858 859
        rs, c, varl, rs_kind rd.rec_sym in
      let ld, rdl' = let_rec (List.map2 conv_rd rdl rsyml) in
      let sm = List.fold_left2 (fun sm d d' ->
        sm_save_rs cl sm d.rec_sym d'.rec_sym) sm rdl rdl' in
      sm, ld

Andrei Paskevich's avatar
Andrei Paskevich committed
860
let clone_pdecl inst cl uc d = match d.pd_node with
861 862 863 864
  | PDtype tdl ->
      let tdl = clone_type_decl inst cl tdl in
      if tdl = [] then uc else
      add_pdecl ~vc:false uc (create_type_decl tdl)
865 866 867 868 869 870
  | PDlet ld ->
      let reads = match ld with
        | LDvar (_,e) -> e.e_effect.eff_reads
        | LDsym (_,c) -> cty_reads c.c_cty
        | LDrec rdl -> List.fold_left (fun spv {rec_rsym = s} ->
            Spv.union spv (cty_reads s.rs_cty)) Spv.empty rdl in
871 872 873
      let frz = Spv.fold (fun v isb ->
        if Sid.mem v.pv_vs.vs_name cl.cl_local then isb
        else ity_freeze isb v.pv_ity) reads isb_empty in
874 875 876
      let frz = Mreg.map (fun ity -> match ity.ity_node with
        | Ityreg r -> r | _ -> assert false) frz.isb_reg in
      cl.rn_table <- Mreg.set_union cl.rn_table frz;
877 878
      let sm, ld = clone_let_defn cl (sm_of_cl cl) ld in
      cl.pv_table <- sm.sm_pv; cl.rs_table <- sm.sm_rs;
879
      add_pdecl ~vc:false uc (create_let_decl ld)
Andrei Paskevich's avatar
Andrei Paskevich committed
880
  | PDexn xs ->
881
      let id = id_clone xs.xs_name in
Andrei Paskevich's avatar
Andrei Paskevich committed
882
      let ity = clone_ity cl xs.xs_ity in
Andrei Paskevich's avatar