CristalCaveGem » LustreC

(********************************************************************)

(*                                                                  *)

(*  The LustreC compiler toolset   /  The LustreC Development Team  *)

(*  Copyright 2012 -    --   ONERA - CNRS - INPT                    *)

(*                                                                  *)

(*  LustreC is free software, distributed WITHOUT ANY WARRANTY      *)

(*  under the terms of the GNU Lesser General Public License        *)

(*  version 2.1.                                                    *)

(*                                                                  *)

(********************************************************************)

open Format

open Log

open Utils

open LustreSpec

open Compiler_common

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

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

(* print a .lusi header file from a source prog *)

let print_lusi prog basename extension =

  let header = Lusic.extract_header basename prog in

  let header_name = basename ^ extension in

  let h_out = open_out header_name in

  let h_fmt = formatter_of_out_channel h_out in

  begin

    Printers.pp_lusi_header h_fmt basename header;

    close_out h_out

  end

(* compile a .lusi header file *)

let compile_header dirname  basename extension =

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

  let header_name = basename ^ extension in

  let lusic_ext = extension ^ "c" in

  begin

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

    let header = parse_header true (dirname ^ "/" ^ header_name) in

    ignore (Modules.load_header ISet.empty header);

    ignore (check_top_decls header);

    create_dest_dir ();

    Log.report ~level:1 

      (fun fmt -> fprintf fmt ".. generating compiled header file %sc@," (destname ^ extension));

    Lusic.write_lusic true header destname lusic_ext;

    Lusic.print_lusic_to_h destname lusic_ext;

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

  end

(* check whether a source file has a compiled header,

   if not, generate the compiled header *)

let compile_source_to_header prog computed_types_env computed_clocks_env basename extension =

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

  let lusic_ext = extension ^ "c" in

  let header_name = destname ^ lusic_ext in

  begin

    if not (Sys.file_exists header_name) then

      begin

	Log.report ~level:1 (fun fmt -> fprintf fmt ".. generating compiled header file %s@," header_name);

	Lusic.write_lusic false (Lusic.extract_header basename prog) destname lusic_ext;

	Lusic.print_lusic_to_h destname lusic_ext

      end

    else

      let lusic = Lusic.read_lusic destname lusic_ext in

      if not lusic.Lusic.from_lusi then

	begin

	  Log.report ~level:1 (fun fmt -> fprintf fmt ".. generating compiled header file %s@," header_name);

       	  Lusic.write_lusic false (Lusic.extract_header basename prog) destname lusic_ext;

(*List.iter (fun top_decl -> Format.eprintf "lusic: %a@." Printers.pp_decl top_decl) lusic.Lusic.contents;*)

	  Lusic.print_lusic_to_h destname lusic_ext

	end

      else

	begin

	  Log.report ~level:1 (fun fmt -> fprintf fmt ".. loading compiled header file %s@," header_name);

	  let header = lusic.Lusic.contents in

	  let (declared_types_env, declared_clocks_env) = get_envs_from_top_decls header in

	  check_compatibility

	    (prog, computed_types_env, computed_clocks_env)

	    (header, declared_types_env, declared_clocks_env)

	end

  end

(* compile a .lus source file *)

let rec compile_source dirname basename extension =

  let source_name = dirname ^ "/" ^ basename ^ extension in

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

  (* Parsing source *)

  let prog = parse_source source_name in

  (* Removing automata *) 

  let prog = Automata.expand_decls prog in

  (* Importing source *)

  let _ = Modules.load_program ISet.empty prog in

  (* Extracting dependencies *)

  let dependencies, type_env, clock_env = import_dependencies prog in

  (* 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;

  (* Generating a .lusi header file only *)

  if !Options.lusi then

    begin

      let lusi_ext = extension ^ "i" in

      Log.report ~level:1 (fun fmt -> fprintf fmt ".. generating interface file %s@," (basename ^ lusi_ext));

      print_lusi prog basename lusi_ext;

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

      exit 0

    end;

  (* 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;

  *)

  (* Creating destination directory if needed *)

  create_dest_dir ();

  (* Compatibility with Lusi *)

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

  let extension = ".lusi" in

  compile_source_to_header prog computed_types_env computed_clocks_env basename extension;

  Typing.uneval_prog_generics prog;

  Clock_calculus.uneval_prog_generics prog;

  (* 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:3 (fun fmt -> fprintf fmt "@[<v 2>@ %a@]@," Scheduling.pp_schedule node_schs);

  Log.report ~level:3 (fun fmt -> fprintf fmt "@[<v 2>@ %a@]@," Scheduling.pp_fanin_table node_schs);

  Log.report ~level:3 (fun fmt -> fprintf fmt "@[<v 2>@ %a@]@," Printers.pp_prog prog);

 (* Optimization of prog: 

    - Unfold consts 

    - eliminate trivial expressions

 *)

  let prog = 

    if !Options.optimization >= 4 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

  (* Optimize machine code *)

  let machine_code = 

    if !Options.optimization >= 2 && !Options.output <> "horn" then

      begin

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

	Optimize_machine.machines_unfold (Corelang.get_consts prog) node_schs machine_code

      end

    else

      machine_code

 in  

  (* Optimize machine code *)

  let machine_code = 

    if !Options.optimization >= 3 && !Options.output <> "horn" then

      begin

	Log.report ~level:1 (fun fmt -> fprintf fmt ".. machines optimization (phase 2)@,");

	Optimize_machine.machines_fusion (Optimize_machine.machines_reuse_variables machine_code node_schs)

      end

    else

      machine_code

 in

  Log.report ~level:3 (fun fmt -> fprintf fmt "@[<v 2>@ %a@]@,"

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

  machine_code);

  (* Printing code *)

  let basename    =  Filename.basename basename in

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

  let _ = match !Options.output with

      "C" -> 

	begin

	  let alloc_header_file = destname ^ "_alloc.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 *)

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

	  C_backend.translate_to_c 

	    alloc_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;

	(* Tracability file if option is activated *)

	if !Options.horntraces then (

	let traces_file = destname ^ ".traces" in (* Could be changed *)

	let traces_out = open_out traces_file in

	let fmt = formatter_of_out_channel traces_out in

	Horn_backend.traces_file 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

  begin

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

  (* We stop the process here *)

    exit 0

  end

let compile dirname basename extension =

  match extension with

  | ".lusi"  -> compile_header dirname basename extension

  | ".lus"   -> compile_source dirname basename extension

  | _        -> assert false

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 dirname = Filename.dirname filename in

    let basename = Filename.chop_suffix (Filename.basename filename) ext in

    compile dirname 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

  | Sys_error msg -> (eprintf "Failure: %s@." msg)

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

(* Local Variables: *)

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

(* End: *)