CristalCaveGem » LustreC

(* ----------------------------------------------------------------------------

 * SchedMCore - A MultiCore Scheduling Framework

 * Copyright (C) 2009-2013, ONERA, Toulouse, FRANCE - LIFL, Lille, FRANCE

 * Copyright (C) 2012-2013, INPT, Toulouse, FRANCE

 *

 * This file is part of Prelude

 *

 * Prelude is free software; you can redistribute it and/or

 * modify it under the terms of the GNU Lesser General Public License

 * as published by the Free Software Foundation ; either version 2 of

 * the License, or (at your option) any later version.

 *

 * Prelude is distributed in the hope that it will be useful, but

 * WITHOUT ANY WARRANTY ; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU

 * Lesser General Public License for more details.

 *

 * You should have received a copy of the GNU Lesser General Public

 * License along with this program ; if not, write to the Free Software

 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307

 * USA

 *---------------------------------------------------------------------------- *)

(* This module is used for the lustre to C compiler *)

open Format

open Log

let usage = "Usage: lustrec [options] <source-file>"

let extensions = [".ec"; ".lus"; ".lusi"]

let check_stateless_decls decls =

  Log.report ~level:1 (fun fmt -> fprintf fmt ".. checking stateless/stateful status@ ");

  try

    Stateless.check_prog decls

  with (Stateless.Error (loc, err)) as exc ->

    eprintf "Stateless status error %a%a@."

      Stateless.pp_error err

      Location.pp_loc loc;

    raise exc

let type_decls env decls =  

  Log.report ~level:1 (fun fmt -> fprintf fmt ".. typing@ ");

  let new_env = 

    begin

      try

	Typing.type_prog env decls

      with (Types.Error (loc,err)) as exc ->

	eprintf "Typing error %a%a@."

	  Types.pp_error err

	  Location.pp_loc loc;

	raise exc

    end 

  in

  if !Options.print_types then

    Log.report ~level:1 (fun fmt -> fprintf fmt "@[<v 2>  %a@]@ " Corelang.pp_prog_type decls);

  new_env

let clock_decls env decls = 

  Log.report ~level:1 (fun fmt -> fprintf fmt ".. clock calculus@ ");

  let new_env =

    begin

      try

	Clock_calculus.clock_prog env decls

      with (Clocks.Error (loc,err)) as exc ->

	eprintf "Clock calculus error %a%a@." Clocks.pp_error err Location.pp_loc loc;

	raise exc

    end

  in

  if !Options.print_clocks then

    Log.report ~level:1 (fun fmt -> fprintf fmt "@[<v 2>  %a@]@ " Corelang.pp_prog_clock decls);

  new_env

(* Loading Lusi file and filling type tables with parsed

   functions/nodes *)

let load_lusi own filename =

  Location.input_name := filename;

  let lexbuf = Lexing.from_channel (open_in filename) in

  Location.init lexbuf filename;

  (* Parsing *)

  Log.report ~level:1 (fun fmt -> fprintf fmt ".. parsing header file %s@ " filename);

    try

      Parse.header own Parser_lustre.header Lexer_lustre.token lexbuf

    with

    | (Lexer_lustre.Error err) | (Parse.Syntax_err err) as exc -> 

      Parse.report_error err;

      raise exc

    | Corelang.Error (loc, err) as exc -> (

      eprintf "Parsing error %a%a@."

	Corelang.pp_error err

	Location.pp_loc loc;

      raise exc

    )

let check_lusi header =

  let new_tenv = type_decls Basic_library.type_env header in   (* Typing *)

  let new_cenv = clock_decls Basic_library.clock_env header in   (* Clock calculus *)

  header, new_tenv, new_cenv

let load_n_check_lusi source_name lusi_name prog computed_types_env computed_clocks_env= 

  try 

    let _ = open_in lusi_name in

    let header = load_lusi true lusi_name in

    let _, declared_types_env, declared_clocks_env = check_lusi header in

      (* checking type compatibility with computed types*)

    Typing.check_env_compat header declared_types_env computed_types_env;

    Typing.uneval_prog_generics prog;

      (* checking clocks compatibility with computed clocks*)

      Clock_calculus.check_env_compat header declared_clocks_env computed_clocks_env;

      Clock_calculus.uneval_prog_generics prog;

      (* checking stateless status compatibility *)

      Stateless.check_compat header

    with Sys_error _ -> ( 

      (* Printing lusi file is necessary *)

      Log.report ~level:1 

	(fun fmt -> 

	  fprintf fmt 

	    ".. generating lustre interface file %s@," lusi_name);

      let lusi_out = open_out lusi_name in

      let lusi_fmt = formatter_of_out_channel lusi_out in

      Typing.uneval_prog_generics prog;

      Clock_calculus.uneval_prog_generics prog;

      Printers.pp_lusi_header lusi_fmt source_name prog

    )

    | (Types.Error (loc,err)) as exc ->

      eprintf "Type mismatch between computed type and declared type in lustre interface file: %a@."

	Types.pp_error err;

      raise exc

    | Clocks.Error (loc, err) as exc ->

      eprintf "Clock mismatch between computed clock and declared clock in lustre interface file: %a@."

	Clocks.pp_error err;

      raise exc

    | Stateless.Error (loc, err) as exc ->

      eprintf "Stateless status mismatch between defined status and declared status in lustre interface file: %a@."

	Stateless.pp_error err;

      raise exc

let rec compile basename extension =

  (* Loading the input file *)

  let source_name = basename^extension in

  Location.input_name := source_name;

  let lexbuf = Lexing.from_channel (open_in source_name) in

  Location.init lexbuf source_name;

  (* Parsing *)

  Log.report ~level:1 

    (fun fmt -> fprintf fmt "@[<v>.. parsing file %s@," source_name);

  let prog =

    try

      Parse.prog Parser_lustre.prog Lexer_lustre.token lexbuf

    with

    | (Lexer_lustre.Error err) | (Parse.Syntax_err err) as exc -> 

      Parse.report_error err;

      raise exc

    | Corelang.Error (loc, err) as exc ->

      eprintf "Parsing error %a%a@."

	Corelang.pp_error err

	Location.pp_loc loc;

      raise exc

  in

  (* Extracting dependencies *)

  Log.report ~level:1 (fun fmt -> fprintf fmt "@[<v 2>.. extracting dependencies@,");

  let dependencies = 

    List.fold_right 

      (fun d accu -> match d.Corelang.top_decl_desc with 

      | Corelang.Open (local, s) -> (s, local)::accu 

      | _ -> accu) 

      prog [] 

  in

  let dependencies, type_env, clock_env =

    List.fold_left (fun (compilation_dep, type_env, clock_env) (s, local) -> 

      try

	let basename = (if local then s else Version.prefix ^ "/include/lustrec/" ^ s ) ^ ".lusi" in 

	Log.report ~level:1 (fun fmt -> fprintf fmt "@[<v 0>Library %s@," basename);

	let comp_dep, lusi_type_env, lusi_clock_env = check_lusi (load_lusi false basename) in 

	Log.report ~level:1 (fun fmt -> fprintf fmt "@]@ ");

	(s, local, comp_dep)::compilation_dep,

	Env.overwrite type_env lusi_type_env,

	Env.overwrite clock_env lusi_clock_env      

      with Sys_error msg -> (

	eprintf "Failure: impossible to load library %s.@.%s@." s msg;

	exit 1

      )

    )  ([], Basic_library.type_env, Basic_library.clock_env) dependencies

  in

  Log.report ~level:1 (fun fmt -> fprintf fmt "@]@ ");

  (* Sorting nodes *)

  let prog = SortProg.sort prog in

  (* Typing *)

  let computed_types_env = type_decls type_env prog in

  (* Clock calculus *)

  let computed_clocks_env = clock_decls clock_env prog in

  (* Checking stateless/stateful status *)

  check_stateless_decls prog;

  (* Perform global inlining *)

  let prog =

    if !Options.global_inline && 

      (match !Options.main_node with | "" -> false | _ -> true) then

      Inliner.global_inline basename prog type_env clock_env

    else

      prog

  in

  (* Delay calculus *)

  (*

    if(!Options.delay_calculus)

    then

    begin

    Log.report ~level:1 (fun fmt -> fprintf fmt ".. initialisation analysis@?");

    try

    Delay_calculus.delay_prog Basic_library.delay_env prog

    with (Delay.Error (loc,err)) as exc ->

    Location.print loc;

    eprintf "%a" Delay.pp_error err;

    Utils.track_exception ();

    raise exc

    end;

  *)

  (*

    eprintf "Causality analysis@.@?";

    (* Causality analysis *)

    begin

    try

    Causality.check_causal_prog prog

    with (Causality.Cycle v) as exc ->

    Causality.pp_error err_formatter v;

    raise exc

    end;

  *)

  (* Compatibility with Lusi *)

  (* Checking the existence of a lusi (Lustre Interface file) *)

  let lusi_name = basename ^ ".lusi" in

  load_n_check_lusi source_name lusi_name prog computed_types_env computed_clocks_env;

  (* Computes and stores generic calls for each node,

     only useful for ANSI C90 compliant generic node compilation *)

  if !Options.ansi then Causality.NodeDep.compute_generic_calls prog;

  (*Hashtbl.iter (fun id td -> match td.Corelang.top_decl_desc with Corelang.Node nd -> Format.eprintf "%s calls %a" id Causality.NodeDep.pp_generic_calls nd | _ -> ()) Corelang.node_table;*)

  (* Normalization phase *)

  Log.report ~level:1 (fun fmt -> fprintf fmt ".. normalization@,");

  (* Special treatment of arrows in lustre backend. We want to keep them *)

  if !Options.output = "lustre" then

    Normalization.unfold_arrow_active := false;

  let prog = Normalization.normalize_prog prog in

  Log.report ~level:2 (fun fmt -> fprintf fmt "@[<v 2>@ %a@]@," Printers.pp_prog prog);

  (* Checking array accesses *)

  if !Options.check then

    begin

      Log.report ~level:1 (fun fmt -> fprintf fmt ".. array access checks@,");

      Access.check_prog prog;

    end;

  (* Computation of node equation scheduling. It also breaks dependency cycles

     and warns about unused input or memory variables *)

  Log.report ~level:1 (fun fmt -> fprintf fmt ".. scheduling@,");

  let prog, node_schs = Scheduling.schedule_prog prog in

  Log.report ~level:1 (fun fmt -> fprintf fmt "@[<v 2>@ %a@]@," Scheduling.pp_warning_unused node_schs);

  Log.report ~level:2 (fun fmt -> fprintf fmt "@[<v 2>@ %a@]@," Printers.pp_prog prog);

 (* Optimization of prog: 

    - Unfold consts 

    - eliminate trivial expressions

 *)

  let prog = 

    if !Options.optimization >= 2 then 

      Optimize_prog.prog_unfold_consts prog 

    else

      prog

  in

  (* DFS with modular code generation *)

  Log.report ~level:1 (fun fmt -> fprintf fmt ".. machines generation@,");

  let machine_code = Machine_code.translate_prog prog node_schs in

  Log.report ~level:2 (fun fmt -> fprintf fmt "@[<v 2>@ %a@]@,"

    (Utils.fprintf_list ~sep:"@ " Machine_code.pp_machine)

    machine_code);

  (* Optimize machine code *)

  let machine_code = 

    if !Options.optimization >= 2 then

      Optimize_machine.optimize_machines machine_code

    else

      machine_code

  in

  (* Creating destination directory if needed *)

  if not (Sys.file_exists !Options.dest_dir) then (

    Log.report ~level:1 (fun fmt -> fprintf fmt ".. creating destination directory@,");

    Unix.mkdir !Options.dest_dir (Unix.stat ".").Unix.st_perm

  );

  if (Unix.stat !Options.dest_dir).Unix.st_kind <> Unix.S_DIR then (

    eprintf "Failure: destination %s is not a directory.@.@." !Options.dest_dir;

    exit 1

  );

  (* Printing code *)

  let basename    =  Filename.basename basename in

  let destname = !Options.dest_dir ^ "/" ^ basename in

  let _ = match !Options.output with

      "C" -> 

	begin

	  let header_file = destname ^ ".h" in (* Could be changed *)

	  let source_lib_file = destname ^ ".c" in (* Could be changed *)

	  let source_main_file = destname ^ "_main.c" in (* Could be changed *)

	  let makefile_file = destname ^ ".makefile" in (* Could be changed *)

	  (* let spec_file_opt = if !Options.c_spec then  *)

	  (*     ( *)

	  (* 	let spec_file = basename ^ "_spec.c" in *)

	  (* 	Log.report ~level:1 (fun fmt -> fprintf fmt ".. opening files %s, %s and %s@," header_file source_file spec_file); *)

	  (* 	Some spec_file  *)

	  (*     ) else ( *)

	  (* 	Log.report ~level:1 (fun fmt -> fprintf fmt ".. opening files %s and %s@," header_file source_file); *)

	  (* 	None  *)

	  (*      ) *)

	  (* in  *)

	  Log.report ~level:1 (fun fmt -> fprintf fmt ".. C code generation@,");

	  C_backend.translate_to_c 

	    header_file source_lib_file source_main_file makefile_file

	    basename prog machine_code dependencies

	end

    | "java" ->

      begin

	failwith "Sorry, but not yet supported !"

    (*let source_file = basename ^ ".java" in

      Log.report ~level:1 (fun fmt -> fprintf fmt ".. opening file %s@,@?" source_file);

      let source_out = open_out source_file in

      let source_fmt = formatter_of_out_channel source_out in

      Log.report ~level:1 (fun fmt -> fprintf fmt ".. java code generation@,@?");

      Java_backend.translate_to_java source_fmt basename normalized_prog machine_code;*)

      end

    | "horn" ->

      begin

	let source_file = destname ^ ".smt2" in (* Could be changed *)

	let source_out = open_out source_file in

	let fmt = formatter_of_out_channel source_out in

	Horn_backend.translate fmt basename prog machine_code

      end

    | "lustre" -> 

      begin

	let source_file = destname ^ ".lustrec.lus" in (* Could be changed *)

	let source_out = open_out source_file in

	let fmt = formatter_of_out_channel source_out in

	Printers.pp_prog fmt prog;

(*	Lustre_backend.translate fmt basename normalized_prog machine_code *)

	()

      end

    | _ -> assert false

  in

  Log.report ~level:1 (fun fmt -> fprintf fmt ".. done !@ @]@.");

  (* We stop the process here *)

  exit 0

let anonymous filename =

  let ok_ext, ext = List.fold_left (fun (ok, ext) ext' -> if not ok && Filename.check_suffix filename ext' then true, ext' else ok, ext) (false, "") extensions in

  if ok_ext then

    let basename = Filename.chop_suffix filename ext in

    compile basename ext

  else

    raise (Arg.Bad ("Can only compile *.lusi, *.lus or *.ec files"))

let _ =

  Corelang.add_internal_funs ();

  try

    Printexc.record_backtrace true;

    Arg.parse Options.options anonymous usage

  with

  | Parse.Syntax_err _ | Lexer_lustre.Error _ 

  | Types.Error (_,_) | Clocks.Error (_,_)

  | Corelang.Error _ (*| Task_set.Error _*) 

  | Causality.Cycle _ -> exit 1

  | exc -> (Utils.track_exception (); raise exc)

(* Local Variables: *)

(* compile-command:"make -C .." *)

(* End: *)