module/language/tree-il/optimize.scm

   1 ;;; Tree-il optimizer
   2
   3 ;; Copyright (C) 2009, 2011, 2012, 2013, 2014 Free Software Foundation, Inc.
   4
   5 ;;;; This library is free software; you can redistribute it and/or
   6 ;;;; modify it under the terms of the GNU Lesser General Public
   7 ;;;; License as published by the Free Software Foundation; either
   8 ;;;; version 3 of the License, or (at your option) any later version.
   9 ;;;;
  10 ;;;; This library is distributed in the hope that it will be useful,
  11 ;;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 ;;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13 ;;;; Lesser General Public License for more details.
  14 ;;;;
  15 ;;;; You should have received a copy of the GNU Lesser General Public
  16 ;;;; License along with this library; if not, write to the Free Software
  17 ;;;; Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  18
  19 ;;; Code:
  20
  21 (define-module (language tree-il optimize)
  22   #:use-module (language tree-il)
  23   #:use-module (language tree-il primitives)
  24   #:use-module (language tree-il peval)
  25   #:use-module (language tree-il cse)
  26   #:use-module (language tree-il fix-letrec)
  27   #:use-module (language tree-il debug)
  28   #:use-module (ice-9 match)
  29   #:export (optimize))
  30
  31 (define (optimize x env opts)
  32   (let ((peval (match (memq #:partial-eval? opts)
  33                  ((#:partial-eval? #f _ ...)
  34                   ;; Disable partial evaluation.
  35                   (lambda (x e) x))
  36                  (_ peval)))
  37         (cse (match (memq #:cse? opts)
  38                ((#:cse? #t _ ...)
  39                 cse)
  40                (_
  41                 ;; Disable Tree-IL CSE by default.
  42                 (lambda (x) x)))))
  43     (fix-letrec
  44      (verify-tree-il
  45       (cse
  46        (verify-tree-il
  47         (peval (expand-primitives (resolve-primitives x env))
  48                env)))))))