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305 lines
12 KiB
OCaml
305 lines
12 KiB
OCaml
(***********************************************************************)
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(* *)
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(* Heptagon *)
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(* *)
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(* Gwenael Delaval, LIG/INRIA, UJF *)
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(* Leonard Gerard, Parkas, ENS *)
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(* Adrien Guatto, Parkas, ENS *)
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(* Cedric Pasteur, Parkas, ENS *)
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(* *)
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(* Copyright 2012 ENS, INRIA, UJF *)
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(* *)
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(* This file is part of the Heptagon compiler. *)
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(* *)
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(* Heptagon is free software: you can redistribute it and/or modify it *)
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(* under the terms of the GNU General Public License as published by *)
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(* the Free Software Foundation, either version 3 of the License, or *)
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(* (at your option) any later version. *)
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(* *)
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(* Heptagon is distributed in the hope that it will be useful, *)
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(* but WITHOUT ANY WARRANTY; without even the implied warranty of *)
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(* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *)
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(* GNU General Public License for more details. *)
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(* *)
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(* You should have received a copy of the GNU General Public License *)
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(* along with Heptagon. If not, see <http://www.gnu.org/licenses/> *)
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(* *)
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(***********************************************************************)
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(* clock checking *)
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(* v_clock is expected to contain correct clocks before entering here :
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either explicit with Cbase representing the node activation clock
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or fresh_clock() for unannoted variables.
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Idem for e_ct : if explicit, it represents a clock annotation.
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Unification is done on this mutable fields.
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e_base_ck is set according to node signatures.
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*)
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open Misc
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open Idents
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open Names
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open Minils
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open Global_printer
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open Mls_printer
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open Signature
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open Types
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open Clocks
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open Location
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open Format
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(** Error Kind *)
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type error_kind = | Etypeclash of ct * ct | Eclockclash of ck * ck | Edefclock
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let error_message loc = function
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| Etypeclash (actual_ct, expected_ct) ->
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Format.eprintf "%aClock Clash: this expression has clock %a,@\n\
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but is expected to have clock %a.@."
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print_location loc
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print_ct actual_ct
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print_ct expected_ct;
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raise Errors.Error
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| Eclockclash (actual_ck, expected_ck) ->
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Format.eprintf "%aClock Clash: this value has clock %a,@\n\
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but is exprected to have clock %a.@."
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print_location loc
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print_ck actual_ck
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print_ck expected_ck;
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raise Errors.Error
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| Edefclock ->
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Format.eprintf "%aArguments defining clocks should be given as names@."
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print_location loc;
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raise Errors.Error
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let ck_of_name h x =
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if is_reset x
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then fresh_clock()
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else
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try Env.find x h
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with Not_found ->
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(* Format.eprintf "looking for %a/%d@." print_ident x x.num; *)
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(* Env.iter (fun k ck -> Format.eprintf "%a/%d => %a@." print_ident k k.num print_ck ck) h; *)
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Misc.internal_error ("clocking: unknown clock name " ^ name x)
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let rec typing_extvalue h w =
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let ck = match w.w_desc with
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| Wconst _ -> fresh_clock()
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| Wvar x -> ck_of_name h x
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| Wwhen (w1, c, n) ->
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let ck_n = ck_of_name h n in
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expect_extvalue h ck_n w1;
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Con (ck_n, c, n)
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| Wfield (w1, _) ->
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typing_extvalue h w1
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| Wreinit (w1, w2) ->
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let t1 = typing_extvalue h w1 in
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let t2 = typing_extvalue h w2 in
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unify_ck t1 t2;
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t1
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in
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(try unify_ck ck w.w_ck
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with Unify ->
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eprintf "Incoherent clock annotation for extvalue %a.@\n"
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Mls_printer.print_extvalue w;
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error_message w.w_loc (Etypeclash (Ck ck, Ck w.w_ck)));
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w.w_ck <- ck;
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ck
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and expect_extvalue h expected_ck e =
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let actual_ck = typing_extvalue h e in
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try unify_ck actual_ck expected_ck
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with
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| Unify -> eprintf "%a : " print_extvalue e;
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error_message e.w_loc (Eclockclash (actual_ck, expected_ck))
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let rec typing_pat h = function
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| Evarpat x -> Ck (ck_of_name h x)
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| Etuplepat pat_list -> Cprod (List.map (typing_pat h) pat_list)
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let typing_app h base pat op w_list = match op with
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| Earray_fill | Eselect | Eselect_dyn | Eselect_trunc | Eupdate | Eequal
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| Eselect_slice | Econcat | Earray | Efield_update | Eifthenelse ->
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List.iter (expect_extvalue h base) w_list;
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Ck base
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| Efun { qual = Module "Iostream"; name = "printf" }
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| Efun { qual = Module "Iostream"; name = "fprintf" } ->
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List.iter (expect_extvalue h base) w_list;
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Cprod []
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| ( Efun f | Enode f) ->
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let node = Modules.find_value f in
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let pat_id_list = Mls_utils.ident_list_of_pat pat in
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let rec build_env a_l v_l env = match a_l, v_l with
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| [],[] -> env
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| a::a_l, v::v_l -> (match a.a_name with
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| None -> build_env a_l v_l env
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| Some n -> build_env a_l v_l ((n,v)::env))
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| _ -> Misc.internal_error "Clocking, non matching signature"
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in
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let env_pat = build_env node.node_outputs pat_id_list [] in
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let env_args = build_env node.node_inputs w_list [] in
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(* implement with Cbase as base, replace name dep by ident dep *)
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let rec sigck_to_ck sck = match sck with
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| Signature.Cbase -> base
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| Signature.Con (sck,c,x) ->
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(* find x in the envs : *)
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let id = try List.assoc x env_pat
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with Not_found ->
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try
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let w = List.assoc x env_args in
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(match w.w_desc with
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| Wvar id -> id
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| _ -> error_message w.w_loc Edefclock)
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with Not_found ->
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Misc.internal_error "Clocking, non matching signature 2"
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in
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Clocks.Con (sigck_to_ck sck, c, id)
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in
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List.iter2 (fun a w -> expect_extvalue h (sigck_to_ck a.a_clock) w) node.node_inputs w_list;
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Clocks.prod (List.map (fun a -> sigck_to_ck a.a_clock) node.node_outputs)
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let rec stateful e = match e.e_desc with
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| Efby _ -> true
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| Ewhen (e,_,_) -> stateful e
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| Eapp({a_unsafe = unsafe}, _, _) when unsafe -> true
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| Eapp({a_op = Enode _}, _, _) -> true
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| _ -> false
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let typing_eq h ({ eq_lhs = pat; eq_rhs = e; eq_loc = loc } as eq) =
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(* typing the expression, returns ct, ck_base *)
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let rec typing e =
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let ct,base = match e.e_desc with
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| Eextvalue w
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| Efby (_, w) ->
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let ck = typing_extvalue h w in
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Ck ck, ck
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| Ewhen (e,c,n) ->
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let ck_n = ck_of_name h n in
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let base = expect (skeleton ck_n e.e_ty) e in
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let base_ck = if stateful e then ck_n else Con (ck_n, c, n) in
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skeleton (Con (ck_n, c, n)) e.e_ty, base_ck
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| Emerge (x, c_e_list) ->
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let ck = ck_of_name h x in
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List.iter (fun (c,e) -> expect_extvalue h (Con (ck,c,x)) e) c_e_list;
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Ck ck, ck
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| Estruct l ->
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let ck = fresh_clock () in
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List.iter (fun (_, e) -> expect_extvalue h ck e) l;
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Ck ck, ck
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| Eapp({a_op = op}, args, _) -> (* hyperchronous reset *)
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let base_ck = fresh_clock () in
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let ct = typing_app h base_ck pat op args in
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ct, base_ck
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| Eiterator (it, {a_op = op}, nl, pargs, args, _) -> (* hyperchronous reset *)
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let base_ck = fresh_clock() in
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let ct = match it with
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| Imap -> (* exactly as if clocking the node *)
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typing_app h base_ck pat op (pargs@args)
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| Imapi -> (* clocking the node with the extra i input on [ck_r] *)
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let il (* stubs i as 0 *) =
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List.map (fun x -> mk_extvalue ~ty:Initial.tint ~linearity:Linearity.Ltop
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~clock:base_ck (Wconst (Initial.mk_static_int 0))) nl
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in
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typing_app h base_ck pat op (pargs@args@il)
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| Ifold | Imapfold ->
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(* clocking node with equality constaint on last input and last output *)
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let ct = typing_app h base_ck pat op (pargs@args) in
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unify_ck (Clocks.last_clock ct) (Misc.last_element args).w_ck;
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ct
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| Ifoldi -> (* clocking the node with the extra i and last in/out constraints *)
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let il (* stubs i as 0 *) =
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List.map (fun x -> mk_extvalue ~ty:Initial.tint ~linearity:Linearity.Ltop
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~clock:base_ck (Wconst (Initial.mk_static_int 0))) nl
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in
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let rec insert_i args = match args with
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| [] -> il
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| [l] -> il @ [l]
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| h::l -> h::(insert_i l)
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in
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let ct = typing_app h base_ck pat op (pargs@(insert_i args)) in
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unify_ck (Clocks.last_clock ct) (Misc.last_element args).w_ck;
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ct
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in
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ct, base_ck
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in
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(try unify ct e.e_ct
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with Unify ->
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eprintf "Inconsistent clock annotation for exp %a.@\n"
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Mls_printer.print_exp e;
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error_message e.e_loc (Etypeclash (ct,e.e_ct)));
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e.e_ct <- ct;
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ct, base
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and expect expected_ct e =
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let actual_ct,base = typing e in
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(try unify actual_ct expected_ct
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with Unify -> error_message e.e_loc (Etypeclash (actual_ct, expected_ct)));
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base
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in
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let ct,base_ck = typing e in
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let pat_ct = typing_pat h pat in
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(try unify ct pat_ct
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with Unify ->
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eprintf "Incoherent clock between right and left side of the equation.@\n";
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error_message loc (Etypeclash (ct, pat_ct)));
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{ eq with eq_base_ck = base_ck }
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let typing_eqs h eq_list = List.map (typing_eq h) eq_list
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let append_env h vds =
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List.fold_left (fun h { v_ident = n; v_clock = ck } -> Env.add n ck h) h vds
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let typing_contract h contract =
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match contract with
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| None -> None, h
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| Some ({ c_local = l_list;
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c_eq = eq_list;
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c_assume = e_a;
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c_enforce = e_g;
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c_assume_loc = e_a_loc;
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c_enforce_loc = e_g_loc;
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c_controllables = c_list } as contract) ->
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let h' = append_env h l_list in
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(* assumption *)
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(* property *)
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let eq_list = typing_eqs h' eq_list in
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expect_extvalue h' Cbase e_a;
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expect_extvalue h' Cbase e_g;
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expect_extvalue h' Cbase e_a_loc;
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expect_extvalue h' Cbase e_g_loc;
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let h = append_env h c_list in
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Some { contract with c_eq = eq_list }, h
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let typing_node node =
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let h0 = append_env Env.empty node.n_input in
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let h0 = append_env h0 node.n_output in
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let contract, h = typing_contract h0 node.n_contract in
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let h = append_env h node.n_local in
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let equs = typing_eqs h node.n_equs in
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(* synchronize input and output on base : find the free vars and set them to base *)
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Env.iter (fun _ ck -> unify_ck Cbase (root_ck_of ck)) h0;
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(*update clock info in variables descriptions *)
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let set_clock vd = { vd with v_clock = ck_repr (Env.find vd.v_ident h) } in
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let node = { node with n_input = List.map set_clock node.n_input;
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n_output = List.map set_clock node.n_output;
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n_local = List.map set_clock node.n_local;
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n_equs = equs;
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n_contract = contract; }
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in
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let sign = Mls_utils.signature_of_node node in
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Check_signature.check_signature sign;
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Modules.replace_value node.n_name sign;
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node
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let program p =
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let program_desc pd = match pd with
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| Pnode nd -> Pnode (typing_node nd)
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| _ -> pd
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in
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{ p with p_desc = List.map program_desc p.p_desc; }
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