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;;; Guile Low Intermediate Language
;; Copyright (C) 2001 Free Software Foundation, Inc.
;;;; 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
;;; Code:
(define-module (language glil)
#:use-module (system base syntax)
#:use-module (system base pmatch)
#:use-module ((srfi srfi-1) #:select (fold))
#:export
(<glil-program> make-glil-program glil-program?
glil-program-nargs glil-program-nrest glil-program-nlocs glil-program-nexts
glil-program-meta glil-program-body glil-program-closure-level
<glil-bind> make-glil-bind glil-bind?
glil-bind-vars
<glil-mv-bind> make-glil-mv-bind glil-mv-bind?
glil-mv-bind-vars glil-mv-bind-rest
<glil-unbind> make-glil-unbind glil-unbind?
<glil-source> make-glil-source glil-source?
glil-source-props
<glil-void> make-glil-void glil-void?
<glil-const> make-glil-const glil-const?
glil-const-obj
<glil-local> make-glil-local glil-local?
glil-local-op glil-local-index
<glil-external> make-glil-external glil-external?
glil-external-op glil-external-depth glil-external-index
<glil-toplevel> make-glil-toplevel glil-toplevel?
glil-toplevel-op glil-toplevel-name
<glil-module> make-glil-module glil-module?
glil-module-op glil-module-mod glil-module-name glil-module-public?
<glil-label> make-glil-label glil-label?
glil-label-label
<glil-branch> make-glil-branch glil-branch?
glil-branch-inst glil-branch-label
<glil-call> make-glil-call glil-call?
glil-call-inst glil-call-nargs
<glil-mv-call> make-glil-mv-call glil-mv-call?
glil-mv-call-nargs glil-mv-call-ra
parse-glil unparse-glil))
(define (print-glil x port)
(format port "#<glil ~s>" (unparse-glil x)))
(define-type (<glil> #:printer print-glil)
;; Meta operations
(<glil-program> nargs nrest nlocs nexts meta body (closure-level #f))
(<glil-bind> vars)
(<glil-mv-bind> vars rest)
(<glil-unbind>)
(<glil-source> props)
;; Objects
(<glil-void>)
(<glil-const> obj)
;; Variables
(<glil-local> op index)
(<glil-external> op depth index)
(<glil-toplevel> op name)
(<glil-module> op mod name public?)
;; Controls
(<glil-label> label)
(<glil-branch> inst label)
(<glil-call> inst nargs)
(<glil-mv-call> nargs ra))
(define (compute-closure-level body)
(fold (lambda (x ret)
(record-case x
((<glil-program> closure-level) (max ret closure-level))
((<glil-external> depth) (max ret depth))
(else ret)))
0 body))
(define %make-glil-program make-glil-program)
(define (make-glil-program . args)
(let ((prog (apply %make-glil-program args)))
(if (not (glil-program-closure-level prog))
(set! (glil-program-closure-level prog)
(compute-closure-level (glil-program-body prog))))
prog))
(define (parse-glil x)
(pmatch x
((program ,nargs ,nrest ,nlocs ,nexts ,meta . ,body)
(make-glil-program nargs nrest nlocs nexts meta (map parse-glil body)))
((bind . ,vars) (make-glil-bind vars))
((mv-bind ,vars ,rest) (make-glil-mv-bind vars rest))
((unbind) (make-glil-unbind))
((source ,props) (make-glil-source props))
((void) (make-glil-void))
((const ,obj) (make-glil-const obj))
((local ,op ,index) (make-glil-local op index))
((external ,op ,depth ,index) (make-glil-external op depth index))
((toplevel ,op ,name) (make-glil-toplevel op name))
((module public ,op ,mod ,name) (make-glil-module op mod name #t))
((module private ,op ,mod ,name) (make-glil-module op mod name #f))
((label ,label) (make-label label))
((branch ,inst ,label) (make-glil-branch inst label))
((call ,inst ,nargs) (make-glil-call inst nargs))
((mv-call ,nargs ,ra) (make-glil-mv-call nargs ra))
(else (error "invalid glil" x))))
(define (unparse-glil glil)
(record-case glil
;; meta
((<glil-program> nargs nrest nlocs nexts meta body)
`(program ,nargs ,nrest ,nlocs ,nexts ,meta ,@(map unparse-glil body)))
((<glil-bind> vars) `(bind ,@vars))
((<glil-mv-bind> vars rest) `(mv-bind ,vars ,rest))
((<glil-unbind>) `(unbind))
((<glil-source> props) `(source ,props))
;; constants
((<glil-void>) `(void))
((<glil-const> obj) `(const ,obj))
;; variables
((<glil-local> op index)
`(local ,op ,index))
((<glil-external> op depth index)
`(external ,op ,depth ,index))
((<glil-toplevel> op name)
`(toplevel ,op ,name))
((<glil-module> op mod name public?)
`(module ,(if public? 'public 'private) ,op ,mod ,name))
;; controls
((<glil-label> label) `(label ,label))
((<glil-branch> inst label) `(branch ,inst ,label))
((<glil-call> inst nargs) `(call ,inst ,nargs))
((<glil-mv-call> nargs ra) `(mv-call ,nargs ,ra))))
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