;;; Tree-il optimizer

;; Copyright (C) 2009 Free Software Foundation, Inc.

;; This program 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 2, or (at your option)
;; any later version.
;; 
;; This program 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 this program; see the file COPYING.  If not, write to
;; the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
;; Boston, MA 02111-1307, USA.

;;; Code:

(define-module (language tree-il optimize)
  #:use-module (language tree-il)
  #:use-module (language tree-il primitives)
  #:export (optimize!))

(define (env-module e)
  (if e (car e) (current-module)))

(define (optimize! x env opts)
  (expand-primitives! (resolve-primitives! x (env-module env))))

;; Possible optimizations:
;; * constant folding, propagation
;; * procedure inlining
;;   * always when single call site
;;   * always for "trivial" procs
;;   * otherwise who knows
;; * dead code elimination
;; * degenerate case optimizations
;; * "fixing letrec"