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Port inline-constructors pass to CPS2

* module/language/cps2/constructors.scm: New file.
* module/language/cps2/optimize.scm: Enable inline-constructors pass.
* module/Makefile.am: Add new file to build.
This commit is contained in:
Andy Wingo 2015-06-02 11:30:21 +02:00
parent bac96c10f5
commit 42f9bdabb5
3 changed files with 111 additions and 2 deletions

View file

@ -149,6 +149,7 @@ CPS_LANG_SOURCES = \
CPS2_LANG_SOURCES = \
language/cps2.scm \
language/cps2/compile-cps.scm \
language/cps2/constructors.scm \
language/cps2/contification.scm \
language/cps2/dce.scm \
language/cps2/effects-analysis.scm \

View file

@ -0,0 +1,98 @@
;;; Continuation-passing style (CPS) intermediate language (IL)
;; Copyright (C) 2013, 2014, 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
;;; Commentary:
;;;
;;; Constructor inlining turns "list" primcalls into a series of conses,
;;; and does similar transformations for "vector".
;;;
;;; Code:
(define-module (language cps2 constructors)
#:use-module (ice-9 match)
#:use-module (language cps2)
#:use-module (language cps2 utils)
#:use-module (language cps2 with-cps)
#:use-module (language cps intmap)
#:export (inline-constructors))
(define (inline-list out k src args)
(define (build-list out args k)
(match args
(()
(with-cps out
(build-term ($continue k src ($const '())))))
((arg . args)
(with-cps out
(letv tail)
(letk ktail ($kargs ('tail) (tail)
($continue k src
($primcall 'cons (arg tail)))))
($ (build-list args ktail))))))
(with-cps out
(letv val)
(letk kvalues ($kargs ('val) (val)
($continue k src
($primcall 'values (val)))))
($ (build-list args kvalues))))
(define (inline-vector out k src args)
(define (initialize out vec args n)
(match args
(()
(with-cps out
(build-term ($continue k src ($primcall 'values (vec))))))
((arg . args)
(with-cps out
(let$ next (initialize vec args (1+ n)))
(letk knext ($kargs () () ,next))
($ (with-cps-constants ((idx n))
(build-term ($continue knext src
($primcall 'vector-set! (vec idx arg))))))))))
(with-cps out
(letv vec)
(let$ body (initialize vec args 0))
(letk kalloc ($kargs ('vec) (vec) ,body))
($ (with-cps-constants ((len (length args))
(init #f))
(build-term ($continue kalloc src
($primcall 'make-vector (len init))))))))
(define (find-constructor-inliner name)
(match name
('list inline-list)
('vector inline-vector)
(_ #f)))
(define (inline-constructors conts)
(with-fresh-name-state conts
(persistent-intmap
(intmap-fold
(lambda (label cont out)
(match cont
(($ $kargs names vars ($ $continue k src ($ $primcall name args)))
(let ((inline (find-constructor-inliner name)))
(if inline
(call-with-values (lambda () (inline out k src args))
(lambda (out term)
(intmap-replace! out label
(build-cont ($kargs names vars ,term)))))
out)))
(_ out)))
conts
conts))))

View file

@ -24,6 +24,7 @@
(define-module (language cps2 optimize)
#:use-module (ice-9 match)
#:use-module (language cps2 constructors)
#:use-module (language cps2 contification)
#:use-module (language cps2 dce)
#:use-module (language cps2 prune-top-level-scopes)
@ -43,8 +44,8 @@
program)))
;; This series of assignments to `env' used to be a series of let*
;; bindings of `env', as you would imagine. In compiled code this is
;; fine because the compiler is able to allocate all let*-bound
;; bindings of `program', as you would imagine. In compiled code this
;; is fine because the compiler is able to allocate all let*-bound
;; variable to the same slot, which also means that the garbage
;; collector doesn't have to retain so many copies of the term being
;; optimized. However during bootstrap, the interpreter doesn't do
@ -58,5 +59,14 @@
(run-pass! prune-top-level-scopes #:prune-top-level-scopes? #t)
(run-pass! simplify #:simplify? #t)
(run-pass! contify #:contify? #t)
(run-pass! inline-constructors #:inline-constructors? #t)
;; (run-pass! specialize-primcalls #:specialize-primcalls? #t)
;; (run-pass! elide-values #:elide-values? #t)
;; (run-pass! prune-bailouts #:prune-bailouts? #t)
;; (run-pass! eliminate-common-subexpressions #:cse? #t)
;; (run-pass! type-fold #:type-fold? #t)
;; (run-pass! resolve-self-references #:resolve-self-references? #t)
;; (run-pass! eliminate-dead-code #:eliminate-dead-code? #t)
;; (run-pass! simplify #:simplify? #t)
program)