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73a769fc2b
* module/language/cps/compile-bytecode.scm (compile-function): * module/language/cps/contification.scm (compute-contification-candidates): * module/language/cps/cse.scm (apply-cse): * module/language/cps/dce.scm (compute-live-code): * module/language/cps/devirtualize-integers.scm (compute-use-counts): * module/language/cps/peel-loops.scm (rename-cont): * module/language/cps/renumber.scm (renumber): * module/language/cps/rotate-loops.scm (rotate-loop): * module/language/cps/simplify.scm (compute-singly-referenced-vars): (beta-reduce): * module/language/cps/slot-allocation.scm (compute-defs-and-uses): (compute-lazy-vars): (compute-shuffles): (compute-frame-size): (allocate-lazy-vars): (allocate-slots): * module/language/cps/specialize-numbers.scm (compute-significant-bits): * module/language/cps/verify.scm (check-valid-var-uses): Allow for the $callk proc to be #f. * module/language/cps/compile-bytecode.scm (compile-function): Reset frame to appropriate size.
79 lines
3 KiB
Scheme
79 lines
3 KiB
Scheme
;;; Continuation-passing style (CPS) intermediate language (IL)
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;; Copyright (C) 2013-2019 Free Software Foundation, Inc.
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;;;; This library is free software; you can redistribute it and/or
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;;;; modify it under the terms of the GNU Lesser General Public
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;;;; License as published by the Free Software Foundation; either
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;;;; version 3 of the License, or (at your option) any later version.
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;;;;
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;;;; This library is distributed in the hope that it will be useful,
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;;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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;;;; Lesser General Public License for more details.
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;;;;
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;;;; You should have received a copy of the GNU Lesser General Public
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;;;; License along with this library; if not, write to the Free Software
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;;;; Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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;;; Commentary:
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;;;
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;;; A pass that replaces free references to recursive functions with
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;;; bound references.
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;;;
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;;; Code:
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(define-module (language cps self-references)
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#:use-module (ice-9 match)
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#:use-module ((srfi srfi-1) #:select (fold))
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#:use-module (language cps)
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#:use-module (language cps utils)
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#:use-module (language cps intmap)
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#:use-module (language cps intset)
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#:export (resolve-self-references))
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(define* (resolve-self-references cps #:optional (label 0) (env empty-intmap))
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(define (subst var)
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(intmap-ref env var (lambda (var) var)))
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(define (rename-exp exp)
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(rewrite-exp exp
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((or ($ $const) ($ $prim)) ,exp)
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(($ $call proc args)
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($call (subst proc) ,(map subst args)))
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(($ $callk k proc args)
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($callk k (subst proc) ,(map subst args)))
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(($ $primcall name param args)
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($primcall name param ,(map subst args)))
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(($ $values args)
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($values ,(map subst args)))))
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(define (rename-term term)
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(rewrite-term term
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(($ $continue k src exp)
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($continue k src ,(rename-exp exp)))
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(($ $branch kf kt src op param args)
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($branch kf kt src op param ,(map subst args)))
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(($ $prompt k kh src escape? tag)
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($prompt k kh src escape? (subst tag)))
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(($ $throw src op param args)
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($throw src op param ,(map subst args)))))
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(define (visit-label label cps)
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(match (intmap-ref cps label)
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(($ $kargs _ _ ($ $continue k src ($ $fun label)))
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(resolve-self-references cps label env))
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(($ $kargs _ _ ($ $continue k src
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($ $rec names vars (($ $fun labels) ...))))
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(fold (lambda (label var cps)
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(match (intmap-ref cps label)
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(($ $kfun src meta self)
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(resolve-self-references cps label
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(intmap-add env var self)))))
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cps labels vars))
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(($ $kargs names vars term)
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(intmap-replace! cps label
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(build-cont ($kargs names vars ,(rename-term term)))))
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(_ cps)))
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(intset-fold visit-label (compute-function-body cps label) cps))
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