57 lines
2.7 KiB
OCaml
57 lines
2.7 KiB
OCaml
(***********************************************************************)
|
|
(* *)
|
|
(* Heptagon *)
|
|
(* *)
|
|
(* Gwenael Delaval, LIG/INRIA, UJF *)
|
|
(* Leonard Gerard, Parkas, ENS *)
|
|
(* Adrien Guatto, Parkas, ENS *)
|
|
(* Cedric Pasteur, Parkas, ENS *)
|
|
(* Marc Pouzet, Parkas, ENS *)
|
|
(* *)
|
|
(* Copyright 2012 ENS, INRIA, UJF *)
|
|
(* *)
|
|
(* This file is part of the Heptagon compiler. *)
|
|
(* *)
|
|
(* Heptagon is free software: you can redistribute it and/or modify it *)
|
|
(* under the terms of the GNU General Public License as published by *)
|
|
(* the Free Software Foundation, either version 3 of the License, or *)
|
|
(* (at your option) any later version. *)
|
|
(* *)
|
|
(* Heptagon 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 General Public License for more details. *)
|
|
(* *)
|
|
(* You should have received a copy of the GNU General Public License *)
|
|
(* along with Heptagon. If not, see <http://www.gnu.org/licenses/> *)
|
|
(* *)
|
|
(***********************************************************************)
|
|
open Obc
|
|
open Obc_mapfold
|
|
|
|
let is_deadcode = function
|
|
| Aassgn (lhs, e) -> (* remove x=x equations *)
|
|
(match e.e_desc with
|
|
| Eextvalue w -> Obc_compare.compare_lhs_extvalue lhs w = 0
|
|
| _ -> false
|
|
)
|
|
| Acase (_, []) -> true
|
|
| Afor(_, _, _, { b_body = [] }) -> true
|
|
| _ -> false
|
|
|
|
let act funs act_list a =
|
|
let a, _ = Obc_mapfold.act funs [] a in
|
|
if is_deadcode a then
|
|
a, act_list
|
|
else
|
|
a, a::act_list
|
|
|
|
let block funs acc b =
|
|
let _, act_list = Obc_mapfold.block funs [] b in
|
|
{ b with b_body = List.rev act_list }, acc
|
|
|
|
let program p =
|
|
let funs = { Obc_mapfold.defaults with block = block; act = act } in
|
|
let p, _ = Obc_mapfold.program_it funs [] p in
|
|
p
|
|
|