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guile/module/language/tree-il/spec.scm
Andy Wingo 4311dc9858 Define new "lowering" phase in compiler
* module/language/cps/compile-bytecode.scm (compile-bytecode):
* module/language/tree-il/compile-bytecode.scm (compile-bytecode):
* module/language/tree-il/compile-cps.scm (compile-cps): Rely on
  compiler to lower incoming term already.
* module/language/tree-il/optimize.scm (make-lowerer): New procedure.
* module/system/base/compile.scm (compute-lowerer): New procedure,
  replaceing add-default-optimizations.
  (compute-compiler): Lower before running compiler.
* module/system/base/language.scm (<language>): Change
  optimizations-for-level field to "lowerer".
* module/scripts/compile.scm (%options, compile): Parse -O0, -O1 and so
  on to #:optimization-level instead of expanding to all the
  optimization flags.
* module/language/cps/optimize.scm (lower-cps): Move here from
  compile-bytecode.scm.
  (make-cps-lowerer): New function.
* module/language/cps/spec.scm (cps): Declare lowerer.
2020-05-08 17:07:56 +02:00

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Scheme

;;; Tree Intermediate Language
;; Copyright (C) 2009, 2010, 2011, 2013, 2015 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 tree-il spec)
#:use-module (system base language)
#:use-module (system base pmatch)
#:use-module (language tree-il)
#:use-module (language tree-il compile-cps)
#:use-module ((language tree-il analyze) #:select (make-analyzer))
#:use-module ((language tree-il optimize) #:select (make-lowerer))
#:export (tree-il))
(define (write-tree-il exp . port)
(apply write (unparse-tree-il exp) port))
(define (join exps env)
(pmatch exps
(() (make-void #f))
((,x) x)
((,x . ,rest)
(make-seq #f x (join rest env)))
(else (error "what!" exps env))))
(define-language tree-il
#:title "Tree Intermediate Language"
#:reader (lambda (port env) (read port))
#:printer write-tree-il
#:parser parse-tree-il
#:joiner join
#:compilers `((cps . ,compile-cps))
#:analyzer make-analyzer
#:lowerer make-lowerer
#:for-humans? #f)