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refactoring [every].

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This commit is contained in:
Léonard Gérard 2010-12-15 23:48:37 +01:00
parent c2d172af48
commit 67a541339f
1 changed files with 6 additions and 26 deletions
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32
compiler/heptagon/transformations/every.ml
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@ -1,25 +1,9 @@
open Heptagon
open Hept_mapfold
open Types
(* Transform [f (...) every e]
into [f (...) every r] and add an equation [r=e] *)
let mk_bool_var n = mk_exp (Evar n) (Tid Initial.pbool)
let mk_bool_param n = mk_var_dec n (Tid Initial.pbool)
let fresh = Idents.gen_fresh "reset" (fun () -> "r")
(* add an equation *)
let equation v acc_eq_list e =
let n = fresh() in
n,
(mk_bool_param n) :: v,
(mk_equation (Eeq(Evarpat n, e))) ::acc_eq_list
let statefull eq_list = List.exists (fun eq -> eq.eq_statefull) eq_list
let is_var = function
| { e_desc = Evar _ } -> true
| _ -> false
@ -32,19 +16,15 @@ let edesc funs (v,acc_eq_list) ed =
let ed, (v, acc_eq_list) = Hept_mapfold.edesc funs (v,acc_eq_list) ed in
match ed with
| Eapp (op, e_list, Some re) when not (is_var re) ->
let n, v, acc_eq_list = equation v acc_eq_list re in
let re = { re with e_desc = Evar n } in
Eapp(op, e_list, Some re), (v, acc_eq_list)
let re, vre, eqre = Reset.equation_from_exp re in
Eapp(op, e_list, Some re), (vre::v, eqre::acc_eq_list)
| Eiterator(it, op, n, e_list, Some re) when not (is_var re) ->
let x, v, acc_eq_list = equation v acc_eq_list re in
let re = { re with e_desc = Evar x } in
Eiterator(it, op, n, e_list, Some re), (v, acc_eq_list)
let re, vre, eqre = Reset.equation_from_exp re in
Eiterator(it, op, n, e_list, Some re), (vre::v, eqre::acc_eq_list)
| _ -> ed, (v, acc_eq_list)
let program p =
let funs = { Hept_mapfold.defaults
with edesc = edesc; block = block } in
let p, _ = program_it funs ([],[]) p in
with Hept_mapfold.edesc = edesc; Hept_mapfold.block = block } in
let p, _ = Hept_mapfold.program_it funs ([],[]) p in
p