source: trunk/abcl/src/org/armedbear/lisp/jvm.lisp @ 13484

Last change on this file since 13484 was 13484, checked in by ehuelsmann, 10 years ago

Store local functions in the parent compiland, since you can't
reach the function from the compiland, but the other way around works.

  • Property svn:eol-style set to native
  • Property svn:keywords set to Id
File size: 28.4 KB
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1;;; jvm.lisp
2;;;
3;;; Copyright (C) 2003-2008 Peter Graves
4;;; $Id: jvm.lisp 13484 2011-08-13 08:29:08Z 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 "s1 argument ~A out of 8-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          ; List of local functions
203                    ; 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
291;; A variable can be stored in a number of locations.
292;;  1. if it's passed as a normal argument, it'll be in a register (max 8)
293;;     the same is true if the variable is a local variable (at any index)
294;;  2. if it's passed in the argument array, it'll be in the array in
295;;     register 1 (register 0 contains the function object)
296;;  3. if the variable is part of a closure, it'll be in the closure array
297;;  4. if the variable is part of the outer scope of a function with a
298;;     non-null lexical environment, the variable is to be looked up
299;;     from a lexical environment object
300;;  5. the variable is a special variable and its binding has been looked
301;;     up and cached in a local register (binding-register)
302
303;; a variable can be either special-p *or* have a register *or*
304;; have an index *or* a closure-index *or* an environment
305
306  register      ; register number for a local variable
307  binding-register ; register number containing the binding reference
308  index         ; index number for a variable in the argument array
309  closure-index ; index number for a variable in the closure context array
310  environment   ; the environment for the variable, if we're compiling in
311                ; a non-null lexical environment with variables
312
313  (reads 0 :type fixnum)
314  (writes 0 :type fixnum)
315  references
316  (references-allowed-p t) ; NIL if this is a symbol macro in the enclosing
317                           ; lexical environment
318  used-non-locally-p
319  (compiland *current-compiland*)
320  block)
321
322(defstruct (var-ref (:constructor make-var-ref (variable)))
323  ;; The variable this reference refers to. Will be NIL if the VAR-REF has been
324  ;; rewritten to reference a constant value.
325  variable
326  ;; True if the VAR-REF has been rewritten to reference a constant value.
327  constant-p
328  ;; The constant value of this VAR-REF.
329  constant-value)
330
331;; obj can be a symbol or variable
332;; returns variable or nil
333(declaim (ftype (function (t) t) unboxed-fixnum-variable))
334(defun unboxed-fixnum-variable (obj)
335  (cond ((symbolp obj)
336         (let ((variable (find-visible-variable obj)))
337           (if (and variable
338                    (eq (variable-representation variable) :int))
339               variable
340               nil)))
341        ((variable-p obj)
342         (if (eq (variable-representation obj) :int)
343             obj
344             nil))
345        (t
346         nil)))
347
348(defvar *child-p* nil
349  "True for local functions created by FLET, LABELS and (NAMED-)LAMBDA")
350
351(defknown find-variable (symbol list) t)
352(defun find-variable (name variables)
353  (dolist (variable variables)
354    (when (eq name (variable-name variable))
355      (return variable))))
356
357(defknown find-visible-variable (t) t)
358(defun find-visible-variable (name)
359  (dolist (variable *visible-variables*)
360    (when (eq name (variable-name variable))
361      (return variable))))
362
363(defknown representation-size (t) (integer 0 65535))
364(defun representation-size (representation)
365  (ecase representation
366    ((NIL :int :boolean :float :char) 1)
367    ((:long :double) 2)))
368
369(defknown allocate-register (t) (integer 0 65535))
370(defun allocate-register (representation)
371  (let ((register *register*))
372    (incf *register* (representation-size representation))
373    (setf *registers-allocated*
374          (max *registers-allocated* *register*))
375    register))
376
377
378(defstruct local-function
379  name
380  definition
381  compiland
382  inline-expansion
383  variable    ;; the variable which contains the loaded compiled function
384              ;; or compiled closure
385  environment ;; the environment in which the function is stored in
386              ;; case of a function from an enclosing lexical environment
387              ;; which itself isn't being compiled
388  (references-allowed-p t) ;;whether a reference to the function CAN be captured
389  (references-needed-p nil) ;;whether a reference to the function NEEDS to be
390                            ;;captured, because the function name is used in a
391                            ;;(function ...) form. Obviously implies
392                            ;;references-allowed-p.
393  )
394
395(defvar *local-functions* ())
396
397(defknown find-local-function (t) t)
398(defun find-local-function (name)
399  (dolist (local-function *local-functions* nil)
400    (when (equal name (local-function-name local-function))
401        (return local-function))))
402
403(defvar *using-arg-array* nil)
404(defvar *hairy-arglist-p* nil)
405
406
407(defvar *block* nil
408  "The innermost block applicable to the current lexical environment.")
409(defvar *blocks* ()
410  "The list of blocks in effect in the current lexical environment.
411
412The top node does not need to be equal to the value of `*block*`. E.g.
413when processing the bindings of a LET form, `*block*` is bound to the node
414of that LET, while the block is not considered 'in effect': that only happens
415until the body is being processed.")
416
417(defstruct node
418  form
419  children
420  (compiland *current-compiland*))
421;; No need for a special constructor: nobody instantiates
422;; nodes directly
423
424(declaim (inline add-node-child))
425(defun add-node-child (parent child)
426  "Add a child node to the `children` list of a parent node,
427if that parent belongs to the same compiland."
428  (when parent
429    (when (eq (node-compiland parent) *current-compiland*)
430      (push child (node-children parent)))))
431
432;; control-transferring blocks: TAGBODY, CATCH, to do: BLOCK
433
434(defstruct (control-transferring-node (:include node))
435  ;; If non-nil, the TAGBODY contains local blocks which "contaminate" the
436  ;; environment, with GO forms in them which target tags in this TAGBODY
437  ;; Non-nil if and only if the block doesn't modify the environment
438  needs-environment-restoration
439  )
440;; No need for a special constructor: nobody instantiates
441;; control-transferring-nodes directly
442
443(defstruct (tagbody-node (:conc-name tagbody-)
444                         (:include control-transferring-node)
445                         (:constructor %make-tagbody-node ()))
446  ;; True if a tag in this tagbody is the target of a non-local GO.
447  non-local-go-p
448  ;; Tags in the tagbody form; a list of tag structures
449  tags
450  ;; Contains a variable whose value uniquely identifies the
451  ;; lexical scope from this block, to be used by GO
452  id-variable)
453(defknown make-tagbody-node () t)
454(defun make-tagbody-node ()
455  (let ((block (%make-tagbody-node)))
456    (push block (compiland-blocks *current-compiland*))
457    (add-node-child *block* block)
458    block))
459
460(defstruct (catch-node (:conc-name catch-)
461                       (:include control-transferring-node)
462                       (:constructor %make-catch-node ()))
463  ;; The catch tag-form is evaluated, meaning we
464  ;; have no predefined value to store here
465  )
466(defknown make-catch-node () t)
467(defun make-catch-node ()
468  (let ((block (%make-catch-node)))
469    (push block (compiland-blocks *current-compiland*))
470    (add-node-child *block* block)
471    block))
472
473(defstruct (block-node (:conc-name block-)
474                       (:include control-transferring-node)
475                       (:constructor %make-block-node (name)))
476  name  ;; Block name
477  (exit (gensym))
478  target
479  ;; True if there is a non-local RETURN from this block.
480  non-local-return-p
481  ;; Contains a variable whose value uniquely identifies the
482  ;; lexical scope from this block, to be used by RETURN-FROM
483  id-variable
484  ;; A list of all RETURN-FROM value forms associated with this block
485  return-value-forms)
486
487(defknown make-block-node (t) t)
488(defun make-block-node (name)
489  (let ((block (%make-block-node name)))
490    (push block (compiland-blocks *current-compiland*))
491    (add-node-child *block* block)
492    block))
493
494(defstruct (jump-node (:conc-name jump-)
495                      (:include node)
496                      (:constructor
497                       %make-jump-node (non-local-p target-block target-tag)))
498  non-local-p
499  target-block
500  target-tag)
501(defun make-jump-node (form non-local-p target-block &optional target-tag)
502  (let ((node (%make-jump-node non-local-p target-block target-tag)))
503    ;; Don't push into compiland blocks, as this as a node rather than a block
504    (setf (node-form node) form)
505    (add-node-child *block* node)
506    node))
507
508
509;; binding blocks: LET, LET*, FLET, LABELS, M-V-B, PROGV, LOCALLY
510;;
511;; Binding blocks can carry references to local (optionally special) variable bindings,
512;;  contain free special bindings or both
513
514(defstruct (binding-node (:include node))
515  ;; number of the register of the saved dynamic env, or NIL if none
516  environment-register
517  ;; Not used for LOCALLY and FLET; LABELS uses vars to store its functions
518  vars
519  free-specials)
520;; nobody instantiates any binding nodes directly, so there's no reason
521;; to create a constructor with the approprate administration code
522
523(defstruct (let/let*-node (:conc-name let-)
524                          (:include binding-node)
525                          (:constructor %make-let/let*-node ())))
526(defknown make-let/let*-node () t)
527(defun make-let/let*-node ()
528  (let ((block (%make-let/let*-node)))
529    (push block (compiland-blocks *current-compiland*))
530    (add-node-child *block* block)
531    block))
532
533(defstruct (flet-node (:conc-name flet-)
534                      (:include binding-node)
535                      (:constructor %make-flet-node ())))
536(defknown make-flet-node () t)
537(defun make-flet-node ()
538  (let ((block (%make-flet-node)))
539    (push block (compiland-blocks *current-compiland*))
540    (add-node-child *block* block)
541    block))
542
543(defstruct (labels-node (:conc-name labels-)
544                        (:include binding-node)
545                        (:constructor %make-labels-node ())))
546(defknown make-labels-node () t)
547(defun make-labels-node ()
548  (let ((block (%make-labels-node)))
549    (push block (compiland-blocks *current-compiland*))
550    (add-node-child *block* block)
551    block))
552
553(defstruct (m-v-b-node (:conc-name m-v-b-)
554                       (:include binding-node)
555                       (:constructor %make-m-v-b-node ())))
556(defknown make-m-v-b-node () t)
557(defun make-m-v-b-node ()
558  (let ((block (%make-m-v-b-node)))
559    (push block (compiland-blocks *current-compiland*))
560    (add-node-child *block* block)
561    block))
562
563(defstruct (progv-node (:conc-name progv-)
564                       (:include binding-node)
565                       (:constructor %make-progv-node ())))
566(defknown make-progv-node () t)
567(defun make-progv-node ()
568  (let ((block (%make-progv-node)))
569    (push block (compiland-blocks *current-compiland*))
570    block))
571
572(defstruct (locally-node (:conc-name locally-)
573                         (:include binding-node)
574                         (:constructor %make-locally-node ())))
575(defknown make-locally-node () t)
576(defun make-locally-node ()
577  (let ((block (%make-locally-node)))
578    (push block (compiland-blocks *current-compiland*))
579    (add-node-child *block* block)
580    block))
581
582;; blocks requiring non-local exits: UNWIND-PROTECT, SYS:SYNCHRONIZED-ON
583
584(defstruct (protected-node (:include node)
585                           (:constructor %make-protected-node ())))
586(defknown make-protected-node () t)
587(defun make-protected-node ()
588  (let ((block (%make-protected-node)))
589    (push block (compiland-blocks *current-compiland*))
590    (add-node-child *block* block)
591    block))
592
593(defstruct (unwind-protect-node (:conc-name unwind-protect-)
594                                (:include protected-node)
595                                (:constructor %make-unwind-protect-node ())))
596(defknown make-unwind-protect-node () t)
597(defun make-unwind-protect-node ()
598  (let ((block (%make-unwind-protect-node)))
599    (push block (compiland-blocks *current-compiland*))
600    (add-node-child *block* block)
601    block))
602
603(defstruct (synchronized-node (:conc-name synchronized-)
604                              (:include protected-node)
605                              (:constructor %make-synchronized-node ())))
606(defknown make-synchronized-node () t)
607(defun make-synchronized-node ()
608  (let ((block (%make-synchronized-node)))
609    (push block (compiland-blocks *current-compiland*))
610    (add-node-child *block* block)
611    block))
612
613(defun find-block (name)
614  (dolist (block *blocks*)
615    (when (and (block-node-p block)
616               (eq name (block-name block)))
617      (return block))))
618
619(defun %find-enclosed-blocks (form)
620  "Helper function for `find-enclosed-blocks`, implementing the actual
621algorithm specified there."
622  (cond
623   ((node-p form) (list form))
624   ((atom form) nil)
625   (t
626    ;; We can't use MAPCAN or DOLIST here: they'll choke on dotted lists
627    (do* ((tail form (cdr tail))
628          blocks)
629         ((null tail) blocks)
630      (setf blocks
631            (nconc (%find-enclosed-blocks (if (consp tail)
632                                              (car tail) tail))
633                   blocks))
634      (when (not (listp tail))
635        (return blocks))))))
636
637(defun find-enclosed-blocks (form)
638  "Returns the immediate enclosed blocks by searching the form's subforms.
639
640More deeply nested blocks can be reached through the `node-children`
641field of the immediate enclosed blocks."
642  (when *blocks*
643    ;; when the innermost enclosing block doesn't have node-children,
644    ;;  there's really nothing to search for.
645    (let ((first-enclosing-block (car *blocks*)))
646      (when (and (eq *current-compiland*
647                     (node-compiland first-enclosing-block))
648                 (null (node-children first-enclosing-block)))
649        (return-from find-enclosed-blocks))))
650
651  (%find-enclosed-blocks form))
652
653
654(defun some-nested-block (predicate blocks)
655  "Applies `predicate` recursively to the `blocks` and its children,
656until predicate returns non-NIL, returning that value.
657
658`blocks` may be a single block or a list of blocks."
659  (when blocks
660    (some #'(lambda (b)
661              (or (funcall predicate b)
662                  (some-nested-block predicate (node-children b))))
663          (if (listp blocks)
664              blocks
665            (list blocks)))))
666
667(defknown node-constant-p (t) boolean)
668(defun node-constant-p (object)
669  (cond ((node-p object)
670         nil)
671        ((var-ref-p object)
672         nil)
673        ((constantp object)
674         t)
675        (t
676         nil)))
677
678(defknown block-requires-non-local-exit-p (t) boolean)
679(defun block-requires-non-local-exit-p (object)
680  "A block which *always* requires a 'non-local-exit' is a block which
681requires a transfer control exception to be thrown: e.g. Go and Return.
682
683Non-local exits are required by blocks which do more in their cleanup
684than just restore the lastSpecialBinding (= dynamic environment).
685"
686  (or (unwind-protect-node-p object)
687      (catch-node-p object)
688      (synchronized-node-p object)))
689
690(defun node-opstack-unsafe-p (node)
691  (or (when (jump-node-p node)
692        (let ((target-block (jump-target-block node)))
693          (and (null (jump-non-local-p node))
694               (member target-block *blocks*))))
695      (when (tagbody-node-p node) (tagbody-non-local-go-p node))
696      (when (block-node-p node) (block-non-local-return-p node))
697      (catch-node-p node)))
698
699(defknown block-creates-runtime-bindings-p (t) boolean)
700(defun block-creates-runtime-bindings-p (block)
701  ;; FIXME: This may be false, if the bindings to be
702  ;; created are a quoted list
703  (progv-node-p block))
704
705(defknown enclosed-by-runtime-bindings-creating-block-p (t) boolean)
706(defun enclosed-by-runtime-bindings-creating-block-p (outermost-block)
707  "Indicates whether the code being compiled/analyzed is enclosed in a
708block which creates special bindings at runtime."
709  (dolist (enclosing-block *blocks*)
710    (when (eq enclosing-block outermost-block)
711      (return-from enclosed-by-runtime-bindings-creating-block-p nil))
712    (when (block-creates-runtime-bindings-p enclosing-block)
713      (return-from enclosed-by-runtime-bindings-creating-block-p t))))
714
715(defknown enclosed-by-protected-block-p (&optional t) boolean)
716(defun enclosed-by-protected-block-p (&optional outermost-block)
717  "Indicates whether the code being compiled/analyzed is enclosed in
718a block which requires a non-local transfer of control exception to
719be generated.
720"
721  (dolist (enclosing-block *blocks*)
722    (when (eq enclosing-block outermost-block)
723      (return-from enclosed-by-protected-block-p nil))
724    (when (block-requires-non-local-exit-p enclosing-block)
725      (return-from enclosed-by-protected-block-p t))))
726
727(defknown enclosed-by-environment-setting-block-p (&optional t) boolean)
728(defun enclosed-by-environment-setting-block-p (&optional outermost-block)
729  (dolist (enclosing-block *blocks*)
730    (when (eq enclosing-block outermost-block)
731      (return nil))
732    (when (and (binding-node-p enclosing-block)
733               (binding-node-environment-register enclosing-block))
734      (return t))))
735
736(defknown environment-register-to-restore (&optional t) t)
737(defun environment-register-to-restore (&optional outermost-block)
738  "Returns the environment register which contains the
739saved environment from the outermost enclosing block:
740
741That's the one which contains the environment used in the outermost block."
742  (flet ((outermost-register (last-register block)
743           (when (eq block outermost-block)
744             (return-from environment-register-to-restore last-register))
745           (or (and (binding-node-p block)
746                    (binding-node-environment-register block))
747               last-register)))
748    (reduce #'outermost-register *blocks*
749            :initial-value nil)))
750
751(defstruct tag
752  ;; The symbol (or integer) naming the tag
753  name
754  ;; The symbol which is the jump target in JVM byte code
755  label
756  ;; The associated TAGBODY
757  block
758  (compiland *current-compiland*)
759  used
760  used-non-locally)
761
762(defknown find-tag (t) t)
763(defun find-tag (name)
764  (dolist (tag *visible-tags*)
765    (when (eql name (tag-name tag))
766      (return tag))))
767
768(defun process-ignore/ignorable (declaration names variables)
769  (when (memq declaration '(IGNORE IGNORABLE))
770    (let ((what (if (eq declaration 'IGNORE) "ignored" "ignorable")))
771      (dolist (name names)
772        (unless (and (consp name) (eq (car name) 'FUNCTION))
773          (let ((variable (find-variable name variables)))
774            (cond ((null variable)
775                   (compiler-style-warn "Declaring unknown variable ~S to be ~A."
776                                        name what))
777                  ((variable-special-p variable)
778                   (compiler-style-warn "Declaring special variable ~S to be ~A."
779                                        name what))
780                  ((eq declaration 'IGNORE)
781                   (setf (variable-ignore-p variable) t))
782                  (t
783                   (setf (variable-ignorable-p variable) t)))))))))
784
785(defun finalize-generic-functions ()
786  (dolist (sym '(make-instance
787                 initialize-instance
788                 shared-initialize))
789    (let ((gf (and (fboundp sym) (fdefinition sym))))
790      (when (typep gf 'generic-function)
791        (unless (compiled-function-p gf)
792          (mop::finalize-generic-function gf))))))
793
794(finalize-generic-functions)
795
796(provide 'jvm)
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