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

exception StopPhase1 of program

let usage = "Usage: lustrec [options] \x1b[4msource file\x1b[0m"

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

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

let print_lusi prog dirname basename extension =

  let header = Lusic.extract_header dirname basename prog in

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

  let h_out = open_out header_name in

  let h_fmt = formatter_of_out_channel h_out in

  begin

    Typing.uneval_prog_generics header;

    Clock_calculus.uneval_prog_generics header;

    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 dirname 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 dirname 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 dirname 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);

	  Modules.check_dependency lusic destname;

	  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

let functional_backend () = 

  match !Options.output with

  | "horn" | "lustre" | "acsl" -> true

  | _ -> false

(* From prog to prog *)

let stage1 prog dirname basename =

  (* Removing automata *) 

  let prog = expand_automata prog in

  Log.report ~level:4 (fun fmt -> fprintf fmt ".. after automata expansion:@.@[<v 2>@ %a@]@," Printers.pp_prog prog);

  (* 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

  (* Perform inlining before any analysis *)

  let orig, prog =

    if !Options.global_inline && !Options.main_node <> "" then

      (if !Options.witnesses then prog else []),

      Inliner.global_inline basename prog type_env clock_env

    else (* if !Option.has_local_inline *)

      [],

      Inliner.local_inline basename prog type_env clock_env

  in

  (* Checking stateless/stateful status *)

  if Scopes.Plugin.is_active () then

    force_stateful_decls prog

  else

    check_stateless_decls prog;

  (* Typing *)

  let computed_types_env = type_decls type_env prog in

  (* Clock calculus *)

  let computed_clocks_env = clock_decls clock_env prog in

  (* Generating a .lusi header file only *)

  if !Options.lusi then

    (* We stop here the processing and produce the current prog. It will be

       exported as a lusi *)

    raise (StopPhase1 prog);

 (* Optimization of prog: 

     - Unfold consts 

     - eliminate trivial expressions

 *)

  (*

  let prog = 

    if !Options.const_unfold || !Options.optimization >= 5 then

      begin

	Log.report ~level:1 (fun fmt -> fprintf fmt ".. eliminating constants and aliases@,");

	Optimize_prog.prog_unfold_consts prog

      end

    else

      prog

  in

  *)

  (* Delay calculus *)

  (* TO BE DONE LATER (Xavier)

    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;

  *)

  (* 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 dirname basename extension;

  Typing.uneval_prog_generics prog;

  Clock_calculus.uneval_prog_generics prog;

  if !Options.global_inline && !Options.main_node <> "" && !Options.witnesses then

    begin

      let orig = Corelang.copy_prog orig in

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

      check_stateless_decls orig;

      let _ = Typing.type_prog type_env orig in

      let _ = Clock_calculus.clock_prog clock_env orig in

      Typing.uneval_prog_generics orig;

      Clock_calculus.uneval_prog_generics orig;

      Inliner.witness

	basename

	!Options.main_node

	orig prog type_env clock_env

    end;

  (* 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);

  let prog =

    if !Options.mpfr

    then

      begin

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

	Mpfr.inject_prog prog

      end

    else

      begin

	Log.report ~level:1 (fun fmt -> fprintf fmt ".. keeping floating-point numbers@,");

	prog

      end 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 ".. checking array accesses@,");

      Access.check_prog prog;

    end;

  prog, dependencies

(* from source to machine code, with optimization *)

let stage2 prog =    

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

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

  (* TODO Salsa optimize prog: 

     - emits warning for programs with pre inside expressions

     - make sure each node arguments and memory is bounded by a local annotation

     - introduce fresh local variables for each real pure subexpression

  *)

  (* 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:4 (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 >= 4 && !Options.output <> "horn" then

      begin

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

	Optimize_machine.machines_cse machine_code

      end

    else

      machine_code

  in

  (* Optimize machine code *)

  let machine_code, removed_table = 

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

      begin

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

	Optimize_machine.machines_unfold (Corelang.get_consts prog) node_schs machine_code

      end

    else

      machine_code, IMap.empty

  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: minimize stack usage by reusing variables@,");

	let node_schs    = Scheduling.remove_prog_inlined_locals removed_table node_schs in

	let reuse_tables = Scheduling.compute_prog_reuse_table node_schs in

	Optimize_machine.machines_fusion (Optimize_machine.machines_reuse_variables machine_code reuse_tables)

      end

    else

      machine_code

  in

  (* Salsa optimize machine code *)

  (*

  let machine_code = 

    if !Options.salsa_enabled then

      begin

	check_main ();

	Log.report ~level:1 (fun fmt -> fprintf fmt ".. salsa machines optimization: optimizing floating-point accuracy with Salsa@,");

	(* Selecting float constants for Salsa *)

	let constEnv = List.fold_left (

	  fun accu c_topdecl ->

	    match c_topdecl.top_decl_desc with

	    | Const c when Types.is_real_type c.const_type  ->

	      (c.const_id, c.const_value) :: accu

	    | _ -> accu

	) [] (Corelang.get_consts prog) 

	in

	List.map 

	  (Machine_salsa_opt.machine_t2machine_t_optimized_by_salsa constEnv) 

	  machine_code 

      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);

  *)

  machine_code

(* printing code *)

let stage3 prog machine_code dependencies basename =

  let basename    =  Filename.basename basename in

  match !Options.output with

    "C" -> 

      begin

	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

       (Format.eprintf "internal error: sorry, but not yet supported !"; assert false)

     (*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 destname = !Options.dest_dir ^ "/" ^ basename in

       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

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

       Horn_backend.translate fmt basename prog (Machine_code.arrow_machine::machine_code);

       (* Tracability file if option is activated *)

       if !Options.traces then (

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

	 let traces_out = open_out traces_file in

	 let fmt = formatter_of_out_channel traces_out in

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

	 Horn_backend_traces.traces_file fmt basename prog machine_code;

       )

     end

  | "lustre" ->

     begin

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

       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

(* 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

  let prog =

    if !Options.mpfr then

      Mpfr.mpfr_module::prog

    else

      prog

  in

  let prog, dependencies = 

    try 

      stage1 prog dirname basename

    with StopPhase1 prog -> (

      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 dirname basename lusi_ext;

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

	  exit 0

	end

      else

        assert false

    )

  in

  let machine_code = 

    stage2 prog 

  in

  if Scopes.Plugin.show_scopes () then

    begin

      let all_scopes = Scopes.compute_scopes prog !Options.main_node in

      (* Printing scopes *)

      if !Options.verbose_level >= 1 then

	Format.printf "Possible scopes are:@   ";

      Format.printf "@[<v>%a@ @]@.@?" Scopes.print_scopes all_scopes;

      exit 0

    end;

  let machine_code = 

    if Scopes.Plugin.is_active () then

      Scopes.Plugin.process_scopes !Options.main_node prog machine_code

    else

      machine_code

  in

  stage3 prog machine_code dependencies basename;

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

    (* We stop the process here *)

  exit 0

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 _ =

  Global.initialize ();

  Corelang.add_internal_funs ();

  try

    Printexc.record_backtrace true;

    let options = Options.options @ 

      List.flatten (

	List.map Options.plugin_opt [

	  Scopes.Plugin.name, Scopes.Plugin.activate, Scopes.Plugin.options

	]

      )

    in

    Arg.parse options anonymous usage

  with

  | Parse.Error _

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

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

  | Causality.Error _ -> exit 1

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

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

(* Local Variables: *)

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

(* End: *)