[passes] linearisation des équations

src/main.ml

@@ -9,12 +9,12 @@ let print_debug d s =
 let print_verbose v s =
   if v then Format.printf "\x1b[33;01;04mStatus:\x1b[0m %s\n" s else ()
 
-let exec_passes ast verbose debug passes f =
+let exec_passes ast main_fn verbose debug passes f =
   let rec aux ast = function
     | [] ->  f ast
     | (n, p) :: passes ->
         verbose (Format.asprintf "Executing pass %s:\n" n);
-        match p verbose debug ast with
+        match p verbose debug main_fn ast with
         | None -> (exit_error ("Error while in the pass "^n^".\n"); exit 0)
         | Some ast -> (
         debug (Format.asprintf "Current AST (after %s):\n%a\n" n Pp.pp_ast ast);
@@ -25,15 +25,17 @@ let exec_passes ast verbose debug passes f =
 
 let _ =
   (** Usage and argument parsing. *)
-  let default_passes = ["chkvar_init_unicity"; "pre2vars"] in
+  let default_passes = ["chkvar_init_unicity"; "pre2vars"; "linearization"] in
   let usage_msg =
     "Usage: main [-passes p1,...,pn] [-ast] [-verbose] [-debug] \
-      [-o output_file] source_file\n" in
+      [-o output_file] [-m main_function] source_file\n" in
   let verbose = ref false in
   let debug = ref false in
   let ppast = ref false in
   let nopopt = ref false in
+  let simopt = ref false in
   let passes = ref [] in
+  let main_fn = ref "main" in
   let source_file = ref "" in
   let output_file = ref "out.c" in
   let anon_fun filename = source_file := filename in
@@ -45,6 +47,9 @@ let _ =
       ("-debug", Arg.Set debug, "Output a lot of debug information");
       ("-p", Arg.String (fun s -> passes := s :: !passes),
             "Add a pass to the compilation process");
+      ("-sim", Arg.Set simopt, "Simulate the main node");
+      ("-m", Arg.String (fun s -> main_fn := s),
+            "Defines what the main function is (defaults to main).");
       ("-o", Arg.Set_string output_file, "Output file (defaults to [out.c])");
     ] in
   Arg.parse speclist anon_fun usage_msg ;
@@ -52,6 +57,7 @@ let _ =
   if !passes = [] then passes := default_passes;
   let print_verbose = print_verbose !verbose in
   let print_debug = print_debug !debug in
+  let main_fn = !main_fn in
 
   (** Definition of the passes table *)
   let passes_table  = Hashtbl.create 100 in
@@ -59,6 +65,7 @@ let _ =
     [
       ("pre2vars", Passes.pre2vars);
       ("chkvar_init_unicity", Passes.chkvar_init_unicity);
+      ("linearization", Passes.pass_linearization);
     ];
 
   (** Main functionality below *)
@@ -101,13 +108,18 @@ let _ =
 
   print_debug (Format.asprintf "Initial AST (before executing any passes):\n%a"
                 Pp.pp_ast ast) ;
-  exec_passes ast print_verbose print_debug passes
+  exec_passes ast main_fn print_verbose print_debug passes
     begin
-    if !ppast
-      then (Format.printf "%a" Pp.pp_ast)
-      else (
-        if !nopopt
-          then (fun _ -> ())
-          else Format.printf "%a" Ast_to_c.ast_to_c)
+    if !simopt
+      then Simulation.simulate main_fn
+      else
+        begin
+        if !ppast
+          then (Format.printf "%a" Pp.pp_ast)
+          else (
+            if !nopopt
+              then (fun _ -> ())
+              else Format.printf "%a" Ast_to_c.ast_to_c)
+        end
     end
 

src/parser.mly

@@ -161,6 +161,12 @@
 %token<bool> CONST_BOOL
 %token<Ast.real> CONST_REAL
 
+%left MO_not
+%left MO_pre
+%left PLUS
+%left MINUS
+%left BO_and BO_or BO_mul BO_div BO_mod BO_arrow BO_fby TO_merge
+
 /* The Entry Point */
 %start main
 %type <Ast.t_nodelist> main
@@ -195,7 +201,12 @@ node_content:
           n_automata = aut;
           n_inputs_type = t_in;
           n_outputs_type = t_out; } in
-      Hashtbl.add defined_nodes node_name n; n };
+      if Hashtbl.find_opt defined_nodes node_name <> None
+        then raise (MyParsingError
+                    (Format.asprintf "The node %s is already defined."
+                                      node_name,
+                    current_location()))
+        else Hashtbl.add defined_nodes node_name n; n };
 
 node_body:
   | /* empty */ { ([], []) }

src/passes.ml

@@ -1,40 +1,9 @@
 (** This file contains simplification passes for our Lustre-like AST *)
 
 open Ast
+open Passes_utils
 
-(** [node_pass] is an auxiliary function used to write passes: it will iterate
-  * the function passed as argument on all the nodes of the program *)
-let node_pass f ast: t_nodelist option =
-  Utils.list_map_option f ast
-
-(** [equation_pass] is an auxiliary function used to write passes: it will
-  * iterate the function passed as argument on all the equations of the
-  * program *)
-let equation_pass f ast: t_nodelist option =
-  let aux (node: t_node): t_node option =
-    match Utils.list_map_option f node.n_equations with
-    | None -> None
-    | Some eqs -> Some {n_name         = node.n_name;
-                        n_inputs       = node.n_inputs;
-                        n_outputs      = node.n_outputs;
-                        n_local_vars   = node.n_local_vars;
-                        n_equations    = eqs;
-                        n_automata     = node.n_automata;
-                        n_inputs_type  = node.n_inputs_type;
-                        n_outputs_type = node.n_outputs_type;
-                       }
-    in
-  node_pass aux ast
-
-let expression_pass f: t_nodelist -> t_nodelist option =
-  let aux (patt, expr) =
-    match f expr with
-    | None -> None
-    | Some expr -> Some (patt, expr)
-  in
-  equation_pass aux
-
-let pre2vars verbose debug =
+let pre2vars verbose debug main_fn =
   let rec all_pre expr =
     match expr with
     | EMonOp (ty, MOp_pre, expr) -> all_pre expr
@@ -115,7 +84,7 @@ let pre2vars verbose debug =
   in
   expression_pass (Utils.somify aux)
 
-let chkvar_init_unicity verbose debug : t_nodelist -> t_nodelist option =
+let chkvar_init_unicity verbose debug main_fn : t_nodelist -> t_nodelist option =
   let aux (node: t_node) : t_node option =
     let incr_aux h n =
       match Hashtbl.find_opt h n with
@@ -129,9 +98,7 @@ let chkvar_init_unicity verbose debug : t_nodelist -> t_nodelist option =
       | [] -> ()
       | eq :: eqs -> (incr_eq h eq; incr_eqlist h eqs)
       in
-
     let incr_branch h (State (_, eqs, _, _): t_state) = incr_eqlist h eqs in
-
     let incr_automata h ((_, states): t_automaton) =
       let acc = Hashtbl.copy h in
         List.iter
@@ -146,7 +113,6 @@ let chkvar_init_unicity verbose debug : t_nodelist -> t_nodelist option =
                 ) h_st) states;
           Hashtbl.iter (fun v n -> Hashtbl.replace h v n) acc
         in
-
     let check_now h : bool=
       Hashtbl.fold
         (fun varname num old_res ->
@@ -161,9 +127,6 @@ let chkvar_init_unicity verbose debug : t_nodelist -> t_nodelist option =
             then (verbose (Format.asprintf "Purging %s" varname); Hashtbl.remove h varname)
             else ()) h
       in*)
-
-
-
     let h = Hashtbl.create Config.maxvar in
     let add_var n v =
       match v with
@@ -176,8 +139,6 @@ let chkvar_init_unicity verbose debug : t_nodelist -> t_nodelist option =
     List.iter add_var_in (snd node.n_inputs);
     List.iter add_var_loc (snd node.n_outputs);
     List.iter add_var_loc (snd node.n_local_vars);
-
-
     (** Usual Equations *)
     incr_eqlist h node.n_equations;
     if check_now h = false
@@ -190,7 +151,43 @@ let chkvar_init_unicity verbose debug : t_nodelist -> t_nodelist option =
             else None
         end
     (** never purge -> failwith never executed! purge_initialized h; *)
-
   in
   node_pass aux
 
+let pass_linearization verbose debug main_fn =
+  let node_lin (node: t_node): t_node option =
+    let rec tpl ((pat, exp): t_equation) =
+      match exp with
+      | ETuple (_, hexps :: texps) ->
+          let p1, p2 =
+            Utils.list_select
+              (List.length (Utils.type_exp hexps))
+              (snd pat) in
+          let t1 = List.flatten (List.map Utils.type_var p1) in
+          let t2 = List.flatten (List.map Utils.type_var p2) in
+          ((t1, p1), hexps)
+            :: (tpl ((t2, p2),
+                ETuple (List.flatten (List.map Utils.type_exp texps), texps)))
+      | ETuple (_, []) -> []
+      | _ -> [(pat, exp)]
+    in
+    let new_locvars = node.n_local_vars in
+    let new_equations = List.flatten
+      begin
+      List.map
+        tpl
+        node.n_equations
+      end in
+    Some
+      {
+        n_name = node.n_name;
+        n_inputs = node.n_inputs;
+        n_outputs = node.n_outputs;
+        n_local_vars = new_locvars;
+        n_equations = new_equations;
+        n_automata = node.n_automata;
+        n_inputs_type = node.n_inputs_type;
+        n_outputs_type = node.n_outputs_type;
+      }
+  in
+  node_pass node_lin

src/passes_utils.ml

@@ -0,0 +1,33 @@
+open Ast
+
+(** [node_pass] is an auxiliary function used to write passes: it will iterate
+  * the function passed as argument on all the nodes of the program *)
+let node_pass f ast: t_nodelist option =
+  Utils.list_map_option f ast
+
+(** [equation_pass] is an auxiliary function used to write passes: it will
+  * iterate the function passed as argument on all the equations of the
+  * program *)
+let equation_pass (f: t_equation -> t_equation option) ast: t_nodelist option =
+  let aux (node: t_node): t_node option =
+    match Utils.list_map_option f node.n_equations with
+    | None -> None
+    | Some eqs -> Some {n_name         = node.n_name;
+                        n_inputs       = node.n_inputs;
+                        n_outputs      = node.n_outputs;
+                        n_local_vars   = node.n_local_vars;
+                        n_equations    = eqs;
+                        n_automata     = node.n_automata;
+                        n_inputs_type  = node.n_inputs_type;
+                        n_outputs_type = node.n_outputs_type;
+                       }
+    in
+  node_pass aux ast
+
+let expression_pass f: t_nodelist -> t_nodelist option =
+  let aux (patt, expr) =
+    match f expr with
+    | None -> None
+    | Some expr -> Some (patt, expr)
+  in
+  equation_pass aux

src/test2.node

@@ -0,0 +1,4 @@
+node diagonal_int (i: int) returns (o1, o2 : int);
+let
+	(o1, o2) = (i, i);
+tel

src/utils.ml

@@ -1,5 +1,14 @@
 open Ast
 
+let rec list_select n = function
+  | [] -> [], []
+  | h :: t ->
+      if n = 0
+        then ([], h :: t)
+        else
+          let p1, p2 = list_select (n-1) t in
+          h :: p1, p2
+
 let rec list_map_option (f: 'a -> 'b option) (l: 'a list) : 'b list option =
   List.fold_right (fun elt acc ->
     match acc, f elt with
@@ -39,3 +48,15 @@ let name_of_var: t_var -> ident = function
   | IVar s -> s
   | BVar s -> s
   | RVar s -> s
+
+let rec fresh_var_name (l: t_varlist) n : ident =
+  let rec aux acc n =
+    let r = Random.int 26 in
+    Format.asprintf "%c%s"
+      (char_of_int (r + (if Random.bool () then 65 else 97)))
+      (if n = 0 then acc else aux acc (n-1))
+  in
+  let name = aux "" n in
+  if List.filter (fun v -> name_of_var v = name) (snd l) = []
+    then name
+    else fresh_var_name l n