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073bb617eb
* module/language/tree-il/optimize.scm: Rework to just export the optimize! procedure. * module/language/tree-il/compile-glil.scm (analyze-lexicals): New function, analyzes and allocates lexical variables. Almost ready to compile now. (codegen): Dedent.
87 lines
2.7 KiB
Scheme
87 lines
2.7 KiB
Scheme
;;; Tree-il optimizer
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;; Copyright (C) 2009 Free Software Foundation, Inc.
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;; This program is free software; you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation; either version 2, or (at your option)
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;; any later version.
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;;
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;; This program 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
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;; GNU General Public License for more details.
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;;
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;; You should have received a copy of the GNU General Public License
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;; along with this program; see the file COPYING. If not, write to
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;; the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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;; Boston, MA 02111-1307, USA.
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;;; Code:
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(define-module (language tree-il optimize)
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#:use-module (system base syntax)
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#:use-module (language tree-il)
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#:use-module (language tree-il inline)
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#:export (optimize!))
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(define (env-module e)
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(if e (car e) (current-module)))
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(define (optimize! x env opts)
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(expand-primitives! (resolve-primitives! x (env-module env))))
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;; Possible optimizations:
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;; * constant folding, propagation
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;; * procedure inlining
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;; * always when single call site
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;; * always for "trivial" procs
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;; * otherwise who knows
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;; * dead code elimination
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;; * degenerate case optimizations
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;; * "fixing letrec"
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(define *interesting-primitive-names*
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'(apply @apply
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call-with-values @call-with-values
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call-with-current-continuation @call-with-current-continuation
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values
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;; compile-time-environment
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eq? eqv? equal?
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= < > <= >= zero?
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+ * - / 1- 1+ quotient remainder modulo
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not
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pair? null? list? acons cons cons*
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car cdr
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set-car! set-cdr!
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caar cadr cdar cddr
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caaar caadr cadar caddr cdaar cdadr cddar cdddr
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caaaar caaadr caadar caaddr cadaar cadadr caddar cadddr
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cdaaar cdaadr cdadar cdaddr cddaar cddadr cdddar cddddr))
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(define *interesting-primitive-vars*
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(let ((h (make-hash-table)))
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(for-each (lambda (x)
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(hashq-set! h (module-variable the-root-module x) x))
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*interesting-primitive-names*)
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h))
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(define (resolve-primitives! x mod)
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(post-order!
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(lambda (x)
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(record-case x
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((<toplevel-ref> src name)
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(and (hashq-ref *interesting-primitive-vars*
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(module-variable mod name))
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(make-primitive-ref src name)))
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((<module-ref> mod name public?)
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(let ((m (if public? (resolve-interface mod) (resolve-module mod))))
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(and m (hashq-ref *interesting-primitive-vars*
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(module-variable m name))
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(make-primitive-ref src name))))
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(else #f)))
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x))
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