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-rw-r--r--module/Makefile.am1
-rw-r--r--module/language/cps/reify-primitives.scm117
2 files changed, 118 insertions, 0 deletions
diff --git a/module/Makefile.am b/module/Makefile.am
index bcef4bf65..d7e524bec 100644
--- a/module/Makefile.am
+++ b/module/Makefile.am
@@ -123,6 +123,7 @@ CPS_LANG_SOURCES = \
language/cps/arities.scm \
language/cps/closure-conversion.scm \
language/cps/primitives.scm \
+ language/cps/reify-primitives.scm \
language/cps/spec.scm \
language/cps/verify.scm
diff --git a/module/language/cps/reify-primitives.scm b/module/language/cps/reify-primitives.scm
new file mode 100644
index 000000000..ebd2da02d
--- /dev/null
+++ b/module/language/cps/reify-primitives.scm
@@ -0,0 +1,117 @@
+;;; Continuation-passing style (CPS) intermediate language (IL)
+
+;; Copyright (C) 2013 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:
+;;;
+;;; A pass to reify lone $prim's that were never folded into a
+;;; $primcall, and $primcall's to primitives that don't have a
+;;; corresponding VM op.
+;;;
+;;; Code:
+
+(define-module (language cps reify-primitives)
+ #:use-module (ice-9 match)
+ #:use-module (language cps)
+ #:use-module (language cps dfg)
+ #:use-module (language cps primitives)
+ #:use-module (language rtl)
+ #:export (reify-primitives))
+
+(define (module-box src module name public? bound? val-proc)
+ (let-gensyms (module-sym name-sym public?-sym bound?-sym kbox box)
+ (build-cps-term
+ ($letconst (('module module-sym module)
+ ('name name-sym name)
+ ('public? public?-sym public?)
+ ('bound? bound?-sym bound?))
+ ($letk ((kbox src ($kargs ('box) (box) ,(val-proc box))))
+ ($continue kbox
+ ($primcall 'cached-module-box
+ (module-sym name-sym public?-sym bound?-sym))))))))
+
+(define (primitive-ref name k)
+ (module-box #f '(guile) name #f #t
+ (lambda (box)
+ (build-cps-term
+ ($continue k ($primcall 'box-ref (box)))))))
+
+(define (reify-clause ktail)
+ (let-gensyms (kclause kbody wna false str eol kthrow throw)
+ (build-cps-cont
+ (kclause #f ($kclause ('() '() #f '() #f)
+ (kbody
+ #f
+ ($kargs () ()
+ ($letconst (('wna wna 'wrong-number-of-args)
+ ('false false #f)
+ ('str str "Wrong number of arguments")
+ ('eol eol '()))
+ ($letk ((kthrow
+ #f
+ ($kargs ('throw) (throw)
+ ($continue ktail
+ ($call throw
+ (wna false str eol false))))))
+ ,(primitive-ref 'throw kthrow))))))))))
+
+;; FIXME: Operate on one function at a time, for efficiency.
+(define (reify-primitives fun)
+ (let ((conts (build-cont-table fun)))
+ (define (visit-fun term)
+ (rewrite-cps-exp term
+ (($ $fun meta free body)
+ ($fun meta free ,(visit-cont body)))))
+ (define (visit-cont cont)
+ (rewrite-cps-cont cont
+ (($ $cont sym src ($ $kargs names syms body))
+ (sym src ($kargs names syms ,(visit-term body))))
+ (($ $cont sym src ($ $kentry self (and tail ($ $cont ktail)) ()))
+ ;; A case-lambda with no clauses. Reify a clause.
+ (sym src ($kentry self ,tail (,(reify-clause ktail)))))
+ (($ $cont sym src ($ $kentry self tail clauses))
+ (sym src ($kentry self ,tail ,(map visit-cont clauses))))
+ (($ $cont sym src ($ $kclause arity body))
+ (sym src ($kclause ,arity ,(visit-cont body))))
+ (($ $cont)
+ ,cont)))
+ (define (visit-term term)
+ (rewrite-cps-term term
+ (($ $letk conts body)
+ ($letk ,(map visit-cont conts) ,(visit-term body)))
+ (($ $continue k exp)
+ ,(match exp
+ (($ $prim name)
+ (match (lookup-cont k conts)
+ (($ $kargs (_)) (primitive-ref name k))
+ (_ (build-cps-term ($continue k ($void))))))
+ (($ $fun)
+ (build-cps-term ($continue k ,(visit-fun exp))))
+ (($ $primcall name args)
+ (cond
+ ((or (prim-rtl-instruction name) (branching-primitive? name))
+ ;; Assume arities are correct.
+ term)
+ (else
+ (let-gensyms (k* v)
+ (build-cps-term
+ ($letk ((k* #f ($kargs (v) (v)
+ ($continue k ($call v args)))))
+ ,(primitive-ref name k*)))))))
+ (_ term)))))
+
+ (visit-fun fun)))