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Name	Size	Permission
closure-conversion.scm	37.26 KB	-rw-r--r--
compile-bytecode.scm	32.1 KB	-rw-r--r--
contification.scm	23.27 KB	-rw-r--r--
cse.scm	32.61 KB	-rw-r--r--
dce.scm	18.02 KB	-rw-r--r--
devirtualize-integers.scm	11.33 KB	-rw-r--r--
effects-analysis.scm	24.55 KB	-rw-r--r--
elide-arity-checks.scm	4.41 KB	-rw-r--r--
graphs.scm	10.16 KB	-rw-r--r--
intmap.scm	28.35 KB	-rw-r--r--
intset.scm	29.59 KB	-rw-r--r--
licm.scm	14.7 KB	-rw-r--r--
loop-instrumentation.scm	2.55 KB	-rw-r--r--
optimize.scm	5.6 KB	-rw-r--r--
peel-loops.scm	14.52 KB	-rw-r--r--
prune-top-level-scopes.scm	2.07 KB	-rw-r--r--
reify-primitives.scm	24.61 KB	-rw-r--r--
renumber.scm	10.21 KB	-rw-r--r--
rotate-loops.scm	10.44 KB	-rw-r--r--
self-references.scm	3.06 KB	-rw-r--r--
simplify.scm	10.52 KB	-rw-r--r--
slot-allocation.scm	40.87 KB	-rw-r--r--
spec.scm	1.83 KB	-rw-r--r--
specialize-numbers.scm	43.45 KB	-rw-r--r--
specialize-primcalls.scm	6.71 KB	-rw-r--r--
split-rec.scm	7.56 KB	-rw-r--r--
switch.scm	18.01 KB	-rw-r--r--
type-checks.scm	3.07 KB	-rw-r--r--
type-fold.scm	28.47 KB	-rw-r--r--
types.scm	80.57 KB	-rw-r--r--
utils.scm	13.68 KB	-rw-r--r--
verify.scm	12.41 KB	-rw-r--r--
with-cps.scm	5.72 KB	-rw-r--r--

Code Editor : self-references.scm

;;; Continuation-passing style (CPS) intermediate language (IL)

;;;; This library is free software; you can redistribute it and/or
;;;; modify it under the terms of the GNU Lesser General Public
;;;; License as published by the Free Software Foundation; either
;;;; version 3 of the License, or (at your option) any later version.
;;;;
;;;; This library 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
;;;; Lesser General Public License for more details.
;;;;
;;;; You should have received a copy of the GNU Lesser General Public
;;;; License along with this library; if not, write to the Free Software
;;;; Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

;;; Commentary:
;;;
;;; A pass that replaces free references to recursive functions with
;;; bound references.
;;;
;;; Code:

(define-module (language cps self-references)
  #:use-module (ice-9 match)
  #:use-module ((srfi srfi-1) #:select (fold))
  #:use-module (language cps)
  #:use-module (language cps utils)
  #:use-module (language cps intmap)
  #:use-module (language cps intset)
  #:export (resolve-self-references))

(define* (resolve-self-references cps #:optional (label 0) (env empty-intmap))
  (define (subst var)
    (intmap-ref env var (lambda (var) var)))

(define (rename-exp exp)
    (rewrite-exp exp
      ((or ($ $const) ($ $prim)) ,exp)
      (($ $call proc args)
       ($call (subst proc) ,(map subst args)))
      (($ $callk k proc args)
       ($callk k (and proc (subst proc)) ,(map subst args)))
      (($ $primcall name param args)
       ($primcall name param ,(map subst args)))
      (($ $values args)
       ($values ,(map subst args)))))

(define (rename-term term)
    (rewrite-term term
      (($ $continue k src exp)
       ($continue k src ,(rename-exp exp)))
      (($ $branch kf kt src op param args)
       ($branch kf kt src op param ,(map subst args)))
      (($ $switch kf kt* src arg)
       ($switch kf kt* src (subst arg)))
      (($ $prompt k kh src escape? tag)
       ($prompt k kh src escape? (subst tag)))
      (($ $throw src op param args)
       ($throw src op param ,(map subst args)))))

(define (visit-label label cps)
    (match (intmap-ref cps label)
      (($ $kargs _ _ ($ $continue k src ($ $fun label)))
       (resolve-self-references cps label env))
      (($ $kargs _ _ ($ $continue k src
                        ($ $rec names vars (($ $fun labels) ...))))
       (fold (lambda (label var cps)
               (match (intmap-ref cps label)
                 (($ $kfun src meta self)
                  (resolve-self-references cps label
                                           (intmap-add env var self)))))
             cps labels vars))
      (($ $kargs names vars term)
       (intmap-replace! cps label
                        (build-cont ($kargs names vars ,(rename-term term)))))
      (_ cps)))

(intset-fold visit-label (compute-function-body cps label) cps))

${this.title}

Code Editor : self-references.scm