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.

module/language/cps2/constructors.scm

@@ -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))))