source: trunk/abcl/src/org/armedbear/lisp/jvm.lisp @ 13222

Last change on this file since 13222 was 13222, checked in by ehuelsmann, 11 years ago

Backport 'unsafe-p-removal' branch: this commit pushes back the
responsibility of maintaining stack consistency in generated (byte) code
to pass2, from a shared pass1/pass2 responsibility. The issue why it can't
happen in pass1 is because in pass1 the full structure of the lisp code
isn't known yet, due to lambda and local function inlining.

  • Property svn:eol-style set to native
  • Property svn:keywords set to Id
File size: 27.8 KB
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1;;; jvm.lisp
2;;;
3;;; Copyright (C) 2003-2008 Peter Graves
4;;; $Id: jvm.lisp 13222 2011-02-15 22:29:22Z ehuelsmann $
5;;;
6;;; This program is free software; you can redistribute it and/or
7;;; modify it under the terms of the GNU General Public License
8;;; as published by the Free Software Foundation; either version 2
9;;; of the License, or (at your option) any later version.
10;;;
11;;; This program is distributed in the hope that it will be useful,
12;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
13;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14;;; GNU General Public License for more details.
15;;;
16;;; You should have received a copy of the GNU General Public License
17;;; along with this program; if not, write to the Free Software
18;;; Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
19;;;
20;;; As a special exception, the copyright holders of this library give you
21;;; permission to link this library with independent modules to produce an
22;;; executable, regardless of the license terms of these independent
23;;; modules, and to copy and distribute the resulting executable under
24;;; terms of your choice, provided that you also meet, for each linked
25;;; independent module, the terms and conditions of the license of that
26;;; module.  An independent module is a module which is not derived from
27;;; or based on this library.  If you modify this library, you may extend
28;;; this exception to your version of the library, but you are not
29;;; obligated to do so.  If you do not wish to do so, delete this
30;;; exception statement from your version.
31
32(in-package "JVM")
33
34(export '(compile-defun *catch-errors* jvm-compile-package
35          derive-compiler-type))
36
37(eval-when (:compile-toplevel :load-toplevel :execute)
38  (require "LOOP")
39  (require "FORMAT")
40  (require "CLOS")
41  (require "PRINT-OBJECT")
42  (require "COMPILER-TYPES")
43  (require "COMPILER-ERROR")
44  (require "KNOWN-FUNCTIONS")
45  (require "DUMP-FORM")
46  (require "JVM-INSTRUCTIONS")
47  (require "JVM-CLASS-FILE")
48  (require "KNOWN-SYMBOLS")
49  (require "JAVA")
50  (require "COMPILER-PASS1")
51  (require "COMPILER-PASS2"))
52
53(defvar *closure-variables* nil)
54
55(defvar *enable-dformat* nil)
56(defvar *callbacks* nil
57  "A list of functions to be called by the compiler and code generator
58in order to generate 'compilation events'.")
59
60(declaim (inline invoke-callbacks))
61(defun invoke-callbacks (&rest args)
62  (dolist (cb *callbacks*)
63    (apply cb args)))
64
65#+nil
66(defun dformat (destination control-string &rest args)
67  (when *enable-dformat*
68    (apply #'sys::%format destination control-string args)))
69
70(defmacro dformat (&rest ignored)
71  (declare (ignore ignored)))
72
73(declaim (inline u2 s1 s2))
74
75(defknown u2 (fixnum) cons)
76(defun u2 (n)
77  (declare (optimize speed))
78  (declare (type (unsigned-byte 16) n))
79  (when (not (<= 0 n 65535))
80    (error "u2 argument ~A out of 65k range." n))
81  (list (logand (ash n -8) #xff)
82        (logand n #xff)))
83
84(defknown s1 (fixnum) fixnum)
85(defun s1 (n)
86  (declare (optimize speed))
87  (declare (type (signed-byte 8) n))
88  (when (not (<= -128 n 127))
89    (error "s2 argument ~A out of 16-bit signed range." n))
90  (if (< n 0)
91      (1+ (logxor (- n) #xFF))
92      n))
93
94
95(defknown s2 (fixnum) cons)
96(defun s2 (n)
97  (declare (optimize speed))
98  (declare (type (signed-byte 16) n))
99  (when (not (<= -32768 n 32767))
100    (error "s2 argument ~A out of 16-bit signed range." n))
101  (u2 (if (< n 0) (1+ (logxor (- n) #xFFFF))
102          n)))
103
104
105
106
107
108(defmacro with-saved-compiler-policy (&body body)
109  "Saves compiler policy variables, restoring them after evaluating `body'."
110  `(let ((*speed* *speed*)
111         (*space* *space*)
112         (*safety* *safety*)
113         (*debug* *debug*)
114         (*explain* *explain*)
115         (*inline-declarations* *inline-declarations*))
116     ,@body))
117
118
119
120(defvar *compiler-debug* nil)
121
122(defvar *pool* nil)
123(defvar *static-code* ())
124(defvar *class-file* nil)
125
126(defvar *externalized-objects* nil)
127(defvar *declared-functions* nil)
128
129(defstruct (abcl-class-file (:include class-file)
130                            (:constructor %make-abcl-class-file))
131  pathname ; pathname of output file
132  class-name
133  lambda-name
134  lambda-list ; as advertised
135  static-initializer
136  constructor
137  objects ;; an alist of externalized objects and their field names
138  (functions (make-hash-table :test 'equal)) ;; because of (SETF ...) functions
139  )
140
141(defun class-name-from-filespec (filespec)
142  (let* ((name (pathname-name filespec)))
143    (declare (type string name))
144    (dotimes (i (length name))
145      (declare (type fixnum i))
146      (when (or (char= (char name i) #\-)
147                (char= (char name i) #\Space))
148        (setf (char name i) #\_)))
149    (make-jvm-class-name
150     (concatenate 'string "org.armedbear.lisp." name))))
151
152(defun make-unique-class-name ()
153  "Creates a random class name for use with a `class-file' structure's
154`class' slot."
155  (make-jvm-class-name
156   (concatenate 'string "abcl_"
157                (substitute #\_ #\-
158                            (java:jcall (java:jmethod "java.util.UUID"
159                                                      "toString")
160                                        (java:jstatic "randomUUID"
161                                                      "java.util.UUID"))))))
162
163(defun make-abcl-class-file (&key pathname lambda-name lambda-list)
164  "Creates a `class-file' structure. If `pathname' is non-NIL, it's
165used to derive a class name. If it is NIL, a random one created
166using `make-unique-class-name'."
167  (let* ((class-name (if pathname
168                         (class-name-from-filespec  pathname)
169                         (make-unique-class-name)))
170         (class-file (%make-abcl-class-file :pathname pathname
171                                            :class class-name ; to be finalized
172                                            :class-name class-name
173                                            :lambda-name lambda-name
174                                            :lambda-list lambda-list
175                                            :access-flags '(:public :final))))
176    (when *file-compilation*
177      (let ((source-attribute
178             (make-source-file-attribute
179              :filename (file-namestring *compile-file-truename*))))
180        (class-add-attribute class-file source-attribute)))
181    class-file))
182
183(defmacro with-class-file (class-file &body body)
184  (let ((var (gensym)))
185    `(let* ((,var                   ,class-file)
186            (*class-file*           ,var)
187            (*pool*                 (abcl-class-file-constants ,var))
188            (*externalized-objects* (abcl-class-file-objects ,var))
189            (*declared-functions*   (abcl-class-file-functions ,var)))
190       (progn ,@body)
191       (setf (abcl-class-file-objects ,var)      *externalized-objects*
192             (abcl-class-file-functions ,var)    *declared-functions*))))
193
194(defstruct compiland
195  name
196  lambda-expression
197  arg-vars          ; variables for lambda arguments
198  free-specials     ;
199  arity             ; number of args, or NIL if the number of args can vary.
200  p1-result         ; the parse tree as created in pass 1
201  parent            ; the parent for compilands which defined within another
202  (children 0       ; Number of local functions
203            :type fixnum) ; defined with FLET, LABELS or LAMBDA
204  blocks            ; TAGBODY, PROGV, BLOCK, etc. blocks
205  argument-register
206  closure-register
207  environment-register
208  class-file ; class-file object
209  (%single-valued-p t))
210
211(defknown compiland-single-valued-p (t) t)
212(defun compiland-single-valued-p (compiland)
213  (unless (compiland-parent compiland)
214    (let ((name (compiland-name compiland)))
215      (when name
216        (let ((result-type
217               (or (function-result-type name)
218                   (and (proclaimed-ftype name)
219                        (ftype-result-type (proclaimed-ftype name))))))
220          (when result-type
221            (return-from compiland-single-valued-p
222                         (cond ((eq result-type '*)
223                                nil)
224                               ((atom result-type)
225                                t)
226                               ((eq (%car result-type) 'VALUES)
227                                (= (length result-type) 2))
228                               (t
229                                t))))))))
230  ;; Otherwise...
231  (compiland-%single-valued-p compiland))
232
233(defvar *current-compiland* nil)
234
235(defvar *this-class* nil)
236
237;; All tags visible at the current point of compilation, some of which may not
238;; be in the current compiland.
239(defvar *visible-tags* ())
240
241;; The next available register.
242(defvar *register* 0)
243
244;; Total number of registers allocated.
245(defvar *registers-allocated* 0)
246
247;; Variables visible at the current point of compilation.
248(defvar *visible-variables* nil
249  "All variables visible to the form currently being
250processed, including free specials.")
251
252;; All variables seen so far.
253(defvar *all-variables* nil
254  "All variables in the lexical scope (thus excluding free specials)
255of the compilands being processed (p1: so far; p2: in total).")
256
257;; Undefined variables that we've already warned about.
258(defvar *undefined-variables* nil)
259
260(defvar *dump-variables* nil)
261
262(defun dump-1-variable (variable)
263  (sys::%format t "  ~S special-p = ~S register = ~S binding-reg = ~S index = ~S declared-type = ~S~%"
264           (variable-name variable)
265           (variable-special-p variable)
266           (variable-register variable)
267           (variable-binding-register variable)
268           (variable-index variable)
269           (variable-declared-type variable)))
270
271(defun dump-variables (list caption &optional (force nil))
272  (when (or force *dump-variables*)
273    (write-string caption)
274    (if list
275        (dolist (variable list)
276          (dump-1-variable variable))
277        (sys::%format t "  None.~%"))))
278
279(defstruct (variable-info (:conc-name variable-)
280                          (:constructor make-variable)
281                          (:predicate variable-p))
282  name
283  initform
284  (declared-type :none)
285  (derived-type :none)
286  ignore-p
287  ignorable-p
288  representation
289  special-p     ; indicates whether a variable is special
290  register      ; register number for a local variable
291  binding-register ; register number containing the binding reference
292  index         ; index number for a variable in the argument array
293  closure-index ; index number for a variable in the closure context array
294  environment   ; the environment for the variable, if we're compiling in
295                ; a non-null lexical environment with variables
296    ;; a variable can be either special-p *or* have a register *or*
297    ;; have an index *or* a closure-index *or* an environment
298  (reads 0 :type fixnum)
299  (writes 0 :type fixnum)
300  references
301  (references-allowed-p t) ; NIL if this is a symbol macro in the enclosing
302                           ; lexical environment
303  used-non-locally-p
304  (compiland *current-compiland*)
305  block)
306
307(defstruct (var-ref (:constructor make-var-ref (variable)))
308  ;; The variable this reference refers to. Will be NIL if the VAR-REF has been
309  ;; rewritten to reference a constant value.
310  variable
311  ;; True if the VAR-REF has been rewritten to reference a constant value.
312  constant-p
313  ;; The constant value of this VAR-REF.
314  constant-value)
315
316;; obj can be a symbol or variable
317;; returns variable or nil
318(declaim (ftype (function (t) t) unboxed-fixnum-variable))
319(defun unboxed-fixnum-variable (obj)
320  (cond ((symbolp obj)
321         (let ((variable (find-visible-variable obj)))
322           (if (and variable
323                    (eq (variable-representation variable) :int))
324               variable
325               nil)))
326        ((variable-p obj)
327         (if (eq (variable-representation obj) :int)
328             obj
329             nil))
330        (t
331         nil)))
332
333(defvar *child-p* nil
334  "True for local functions created by FLET, LABELS and (NAMED-)LAMBDA")
335
336(defknown find-variable (symbol list) t)
337(defun find-variable (name variables)
338  (dolist (variable variables)
339    (when (eq name (variable-name variable))
340      (return variable))))
341
342(defknown find-visible-variable (t) t)
343(defun find-visible-variable (name)
344  (dolist (variable *visible-variables*)
345    (when (eq name (variable-name variable))
346      (return variable))))
347
348(defknown representation-size (t) (integer 0 65535))
349(defun representation-size (representation)
350  (ecase representation
351    ((NIL :int :boolean :float :char) 1)
352    ((:long :double) 2)))
353
354(defknown allocate-register (t) (integer 0 65535))
355(defun allocate-register (representation)
356  (let ((register *register*))
357    (incf *register* (representation-size representation))
358    (setf *registers-allocated*
359          (max *registers-allocated* *register*))
360    register))
361
362
363(defstruct local-function
364  name
365  definition
366  compiland
367  inline-expansion
368  function    ;; the function loaded through load-compiled-function
369  class-file  ;; the class file structure for this function
370  variable    ;; the variable which contains the loaded compiled function
371              ;; or compiled closure
372  environment ;; the environment in which the function is stored in
373              ;; case of a function from an enclosing lexical environment
374              ;; which itself isn't being compiled
375  (references-allowed-p t) ;;whether a reference to the function CAN be captured
376  (references-needed-p nil) ;;whether a reference to the function NEEDS to be
377                            ;;captured, because the function name is used in a
378                            ;;(function ...) form. Obviously implies
379                            ;;references-allowed-p.
380  )
381
382(defvar *local-functions* ())
383
384(defknown find-local-function (t) t)
385(defun find-local-function (name)
386  (dolist (local-function *local-functions* nil)
387    (when (equal name (local-function-name local-function))
388        (return local-function))))
389
390(defvar *using-arg-array* nil)
391(defvar *hairy-arglist-p* nil)
392
393
394(defvar *block* nil
395  "The innermost block applicable to the current lexical environment.")
396(defvar *blocks* ()
397  "The list of blocks in effect in the current lexical environment.
398
399The top node does not need to be equal to the value of `*block*`. E.g.
400when processing the bindings of a LET form, `*block*` is bound to the node
401of that LET, while the block is not considered 'in effect': that only happens
402until the body is being processed.")
403
404(defstruct node
405  form
406  children
407  (compiland *current-compiland*))
408;; No need for a special constructor: nobody instantiates
409;; nodes directly
410
411(declaim (inline add-node-child))
412(defun add-node-child (parent child)
413  "Add a child node to the `children` list of a parent node,
414if that parent belongs to the same compiland."
415  (when parent
416    (when (eq (node-compiland parent) *current-compiland*)
417      (push child (node-children parent)))))
418
419;; control-transferring blocks: TAGBODY, CATCH, to do: BLOCK
420
421(defstruct (control-transferring-node (:include node))
422  ;; If non-nil, the TAGBODY contains local blocks which "contaminate" the
423  ;; environment, with GO forms in them which target tags in this TAGBODY
424  ;; Non-nil if and only if the block doesn't modify the environment
425  needs-environment-restoration
426  )
427;; No need for a special constructor: nobody instantiates
428;; control-transferring-nodes directly
429
430(defstruct (tagbody-node (:conc-name tagbody-)
431                         (:include control-transferring-node)
432                         (:constructor %make-tagbody-node ()))
433  ;; True if a tag in this tagbody is the target of a non-local GO.
434  non-local-go-p
435  ;; Tags in the tagbody form; a list of tag structures
436  tags
437  ;; Contains a variable whose value uniquely identifies the
438  ;; lexical scope from this block, to be used by GO
439  id-variable)
440(defknown make-tagbody-node () t)
441(defun make-tagbody-node ()
442  (let ((block (%make-tagbody-node)))
443    (push block (compiland-blocks *current-compiland*))
444    (add-node-child *block* block)
445    block))
446
447(defstruct (catch-node (:conc-name catch-)
448                       (:include control-transferring-node)
449                       (:constructor %make-catch-node ()))
450  ;; The catch tag-form is evaluated, meaning we
451  ;; have no predefined value to store here
452  )
453(defknown make-catch-node () t)
454(defun make-catch-node ()
455  (let ((block (%make-catch-node)))
456    (push block (compiland-blocks *current-compiland*))
457    (add-node-child *block* block)
458    block))
459
460(defstruct (block-node (:conc-name block-)
461                       (:include control-transferring-node)
462                       (:constructor %make-block-node (name)))
463  name  ;; Block name
464  (exit (gensym))
465  target
466  ;; True if there is a non-local RETURN from this block.
467  non-local-return-p
468  ;; Contains a variable whose value uniquely identifies the
469  ;; lexical scope from this block, to be used by RETURN-FROM
470  id-variable
471  ;; A list of all RETURN-FROM value forms associated with this block
472  return-value-forms)
473
474(defknown make-block-node (t) t)
475(defun make-block-node (name)
476  (let ((block (%make-block-node name)))
477    (push block (compiland-blocks *current-compiland*))
478    (add-node-child *block* block)
479    block))
480
481(defstruct (jump-node (:conc-name jump-)
482                      (:include node)
483                      (:constructor
484                       %make-jump-node (non-local-p target-block target-tag)))
485  non-local-p
486  target-block
487  target-tag)
488(defun make-jump-node (form non-local-p target-block &optional target-tag)
489  (let ((node (%make-jump-node non-local-p target-block target-tag)))
490    ;; Don't push into compiland blocks, as this as a node rather than a block
491    (setf (node-form node) form)
492    (add-node-child *block* node)
493    node))
494
495
496;; binding blocks: LET, LET*, FLET, LABELS, M-V-B, PROGV, LOCALLY
497;;
498;; Binding blocks can carry references to local (optionally special) variable bindings,
499;;  contain free special bindings or both
500
501(defstruct (binding-node (:include node))
502  ;; number of the register of the saved dynamic env, or NIL if none
503  environment-register
504  ;; Not used for LOCALLY and FLET; LABELS uses vars to store its functions
505  vars
506  free-specials)
507;; nobody instantiates any binding nodes directly, so there's no reason
508;; to create a constructor with the approprate administration code
509
510(defstruct (let/let*-node (:conc-name let-)
511                          (:include binding-node)
512                          (:constructor %make-let/let*-node ())))
513(defknown make-let/let*-node () t)
514(defun make-let/let*-node ()
515  (let ((block (%make-let/let*-node)))
516    (push block (compiland-blocks *current-compiland*))
517    (add-node-child *block* block)
518    block))
519
520(defstruct (flet-node (:conc-name flet-)
521                      (:include binding-node)
522                      (:constructor %make-flet-node ())))
523(defknown make-flet-node () t)
524(defun make-flet-node ()
525  (let ((block (%make-flet-node)))
526    (push block (compiland-blocks *current-compiland*))
527    (add-node-child *block* block)
528    block))
529
530(defstruct (labels-node (:conc-name labels-)
531                        (:include binding-node)
532                        (:constructor %make-labels-node ())))
533(defknown make-labels-node () t)
534(defun make-labels-node ()
535  (let ((block (%make-labels-node)))
536    (push block (compiland-blocks *current-compiland*))
537    (add-node-child *block* block)
538    block))
539
540(defstruct (m-v-b-node (:conc-name m-v-b-)
541                       (:include binding-node)
542                       (:constructor %make-m-v-b-node ())))
543(defknown make-m-v-b-node () t)
544(defun make-m-v-b-node ()
545  (let ((block (%make-m-v-b-node)))
546    (push block (compiland-blocks *current-compiland*))
547    (add-node-child *block* block)
548    block))
549
550(defstruct (progv-node (:conc-name progv-)
551                       (:include binding-node)
552                       (:constructor %make-progv-node ())))
553(defknown make-progv-node () t)
554(defun make-progv-node ()
555  (let ((block (%make-progv-node)))
556    (push block (compiland-blocks *current-compiland*))
557    block))
558
559(defstruct (locally-node (:conc-name locally-)
560                         (:include binding-node)
561                         (:constructor %make-locally-node ())))
562(defknown make-locally-node () t)
563(defun make-locally-node ()
564  (let ((block (%make-locally-node)))
565    (push block (compiland-blocks *current-compiland*))
566    (add-node-child *block* block)
567    block))
568
569;; blocks requiring non-local exits: UNWIND-PROTECT, SYS:SYNCHRONIZED-ON
570
571(defstruct (protected-node (:include node)
572                           (:constructor %make-protected-node ())))
573(defknown make-protected-node () t)
574(defun make-protected-node ()
575  (let ((block (%make-protected-node)))
576    (push block (compiland-blocks *current-compiland*))
577    (add-node-child *block* block)
578    block))
579
580(defstruct (unwind-protect-node (:conc-name unwind-protect-)
581                                (:include protected-node)
582                                (:constructor %make-unwind-protect-node ())))
583(defknown make-unwind-protect-node () t)
584(defun make-unwind-protect-node ()
585  (let ((block (%make-unwind-protect-node)))
586    (push block (compiland-blocks *current-compiland*))
587    (add-node-child *block* block)
588    block))
589
590(defstruct (synchronized-node (:conc-name synchronized-)
591                              (:include protected-node)
592                              (:constructor %make-synchronized-node ())))
593(defknown make-synchronized-node () t)
594(defun make-synchronized-node ()
595  (let ((block (%make-synchronized-node)))
596    (push block (compiland-blocks *current-compiland*))
597    (add-node-child *block* block)
598    block))
599
600(defun find-block (name)
601  (dolist (block *blocks*)
602    (when (and (block-node-p block)
603               (eq name (block-name block)))
604      (return block))))
605
606(defun %find-enclosed-blocks (form)
607  "Helper function for `find-enclosed-blocks`, implementing the actual
608algorithm specified there."
609  (cond
610   ((node-p form) (list form))
611   ((atom form) nil)
612   (t
613    ;; We can't use MAPCAN or DOLIST here: they'll choke on dotted lists
614    (do* ((tail form (cdr tail))
615          blocks)
616         ((null tail) blocks)
617      (setf blocks
618            (nconc (%find-enclosed-blocks (if (consp tail)
619                                              (car tail) tail))
620                   blocks))
621      (when (not (listp tail))
622        (return blocks))))))
623
624(defun find-enclosed-blocks (form)
625  "Returns the immediate enclosed blocks by searching the form's subforms.
626
627More deeply nested blocks can be reached through the `node-children`
628field of the immediate enclosed blocks."
629  (when *blocks*
630    ;; when the innermost enclosing block doesn't have node-children,
631    ;;  there's really nothing to search for.
632    (let ((first-enclosing-block (car *blocks*)))
633      (when (and (eq *current-compiland*
634                     (node-compiland first-enclosing-block))
635                 (null (node-children first-enclosing-block)))
636        (return-from find-enclosed-blocks))))
637
638  (%find-enclosed-blocks form))
639
640
641(defun some-nested-block (predicate blocks)
642  "Applies `predicate` recursively to the `blocks` and its children,
643until predicate returns non-NIL, returning that value.
644
645`blocks` may be a single block or a list of blocks."
646  (when blocks
647    (some #'(lambda (b)
648              (or (funcall predicate b)
649                  (some-nested-block predicate (node-children b))))
650          (if (listp blocks)
651              blocks
652            (list blocks)))))
653
654(defknown node-constant-p (t) boolean)
655(defun node-constant-p (object)
656  (cond ((node-p object)
657         nil)
658        ((var-ref-p object)
659         nil)
660        ((constantp object)
661         t)
662        (t
663         nil)))
664
665(defknown block-requires-non-local-exit-p (t) boolean)
666(defun block-requires-non-local-exit-p (object)
667  "A block which *always* requires a 'non-local-exit' is a block which
668requires a transfer control exception to be thrown: e.g. Go and Return.
669
670Non-local exits are required by blocks which do more in their cleanup
671than just restore the lastSpecialBinding (= dynamic environment).
672"
673  (or (unwind-protect-node-p object)
674      (catch-node-p object)
675      (synchronized-node-p object)))
676
677(defun node-opstack-unsafe-p (node)
678  (or (when (jump-node-p node)
679        (let ((target-block (jump-target-block node)))
680          (and (null (jump-non-local-p node))
681               (member target-block *blocks*))))
682      (when (tagbody-node-p node) (tagbody-non-local-go-p node))
683      (when (block-node-p node) (block-non-local-return-p node))
684      (catch-node-p node)))
685
686(defknown block-creates-runtime-bindings-p (t) boolean)
687(defun block-creates-runtime-bindings-p (block)
688  ;; FIXME: This may be false, if the bindings to be
689  ;; created are a quoted list
690  (progv-node-p block))
691
692(defknown enclosed-by-runtime-bindings-creating-block-p (t) boolean)
693(defun enclosed-by-runtime-bindings-creating-block-p (outermost-block)
694  "Indicates whether the code being compiled/analyzed is enclosed in a
695block which creates special bindings at runtime."
696  (dolist (enclosing-block *blocks*)
697    (when (eq enclosing-block outermost-block)
698      (return-from enclosed-by-runtime-bindings-creating-block-p nil))
699    (when (block-creates-runtime-bindings-p enclosing-block)
700      (return-from enclosed-by-runtime-bindings-creating-block-p t))))
701
702(defknown enclosed-by-protected-block-p (&optional t) boolean)
703(defun enclosed-by-protected-block-p (&optional outermost-block)
704  "Indicates whether the code being compiled/analyzed is enclosed in
705a block which requires a non-local transfer of control exception to
706be generated.
707"
708  (dolist (enclosing-block *blocks*)
709    (when (eq enclosing-block outermost-block)
710      (return-from enclosed-by-protected-block-p nil))
711    (when (block-requires-non-local-exit-p enclosing-block)
712      (return-from enclosed-by-protected-block-p t))))
713
714(defknown enclosed-by-environment-setting-block-p (&optional t) boolean)
715(defun enclosed-by-environment-setting-block-p (&optional outermost-block)
716  (dolist (enclosing-block *blocks*)
717    (when (eq enclosing-block outermost-block)
718      (return nil))
719    (when (and (binding-node-p enclosing-block)
720               (binding-node-environment-register enclosing-block))
721      (return t))))
722
723(defknown environment-register-to-restore (&optional t) t)
724(defun environment-register-to-restore (&optional outermost-block)
725  "Returns the environment register which contains the
726saved environment from the outermost enclosing block:
727
728That's the one which contains the environment used in the outermost block."
729  (flet ((outermost-register (last-register block)
730           (when (eq block outermost-block)
731             (return-from environment-register-to-restore last-register))
732           (or (and (binding-node-p block)
733                    (binding-node-environment-register block))
734               last-register)))
735    (reduce #'outermost-register *blocks*
736            :initial-value nil)))
737
738(defstruct tag
739  ;; The symbol (or integer) naming the tag
740  name
741  ;; The symbol which is the jump target in JVM byte code
742  label
743  ;; The associated TAGBODY
744  block
745  (compiland *current-compiland*)
746  used
747  used-non-locally)
748
749(defknown find-tag (t) t)
750(defun find-tag (name)
751  (dolist (tag *visible-tags*)
752    (when (eql name (tag-name tag))
753      (return tag))))
754
755(defun process-ignore/ignorable (declaration names variables)
756  (when (memq declaration '(IGNORE IGNORABLE))
757    (let ((what (if (eq declaration 'IGNORE) "ignored" "ignorable")))
758      (dolist (name names)
759        (unless (and (consp name) (eq (car name) 'FUNCTION))
760          (let ((variable (find-variable name variables)))
761            (cond ((null variable)
762                   (compiler-style-warn "Declaring unknown variable ~S to be ~A."
763                                        name what))
764                  ((variable-special-p variable)
765                   (compiler-style-warn "Declaring special variable ~S to be ~A."
766                                        name what))
767                  ((eq declaration 'IGNORE)
768                   (setf (variable-ignore-p variable) t))
769                  (t
770                   (setf (variable-ignorable-p variable) t)))))))))
771
772(defun finalize-generic-functions ()
773  (dolist (sym '(make-instance
774                 initialize-instance
775                 shared-initialize))
776    (let ((gf (and (fboundp sym) (fdefinition sym))))
777      (when (typep gf 'generic-function)
778        (unless (compiled-function-p gf)
779          (mop::finalize-generic-function gf))))))
780
781(finalize-generic-functions)
782
783(provide 'jvm)
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