source: branches/unsafe-p-removal/abcl/src/org/armedbear/lisp/jvm.lisp @ 13151

Last change on this file since 13151 was 13151, checked in by ehuelsmann, 11 years ago

No longer rewrite ordinary function calls for stack safety,
instead, let the code generator determine if it closes over
a block of unsafe code.

We need to remember per GO/RETURN-FROM to which block they
go in order to determine opstack safety.

  • Property svn:eol-style set to native
  • Property svn:keywords set to Id
File size: 28.1 KB
Line 
1;;; jvm.lisp
2;;;
3;;; Copyright (C) 2003-2008 Peter Graves
4;;; $Id: jvm.lisp 13151 2011-01-15 20:51:11Z 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 allocate-register () (integer 0 65535))
349(defun allocate-register ()
350  (let* ((register *register*)
351         (next-register (1+ register)))
352    (declare (type (unsigned-byte 16) register next-register))
353    (setf *register* next-register)
354    (when (< *registers-allocated* next-register)
355      (setf *registers-allocated* next-register))
356    register))
357
358(defknown allocate-register-pair () (integer 0 65535))
359(defun allocate-register-pair ()
360  (let* ((register *register*)
361         (next-register (+ register 2)))
362    (declare (type (unsigned-byte 16) register next-register))
363    (setf *register* next-register)
364    (when (< *registers-allocated* next-register)
365      (setf *registers-allocated* next-register))
366    register))
367
368(defstruct local-function
369  name
370  definition
371  compiland
372  inline-expansion
373  function    ;; the function loaded through load-compiled-function
374  class-file  ;; the class file structure for this function
375  variable    ;; the variable which contains the loaded compiled function
376              ;; or compiled closure
377  environment ;; the environment in which the function is stored in
378              ;; case of a function from an enclosing lexical environment
379              ;; which itself isn't being compiled
380  (references-allowed-p t) ;;whether a reference to the function CAN be captured
381  (references-needed-p nil) ;;whether a reference to the function NEEDS to be
382                            ;;captured, because the function name is used in a
383                            ;;(function ...) form. Obviously implies
384                            ;;references-allowed-p.
385  )
386
387(defvar *local-functions* ())
388
389(defknown find-local-function (t) t)
390(defun find-local-function (name)
391  (dolist (local-function *local-functions* nil)
392    (when (equal name (local-function-name local-function))
393        (return local-function))))
394
395(defvar *using-arg-array* nil)
396(defvar *hairy-arglist-p* nil)
397
398
399(defvar *block* nil
400  "The innermost block applicable to the current lexical environment.")
401(defvar *blocks* ()
402  "The list of blocks in effect in the current lexical environment.
403
404The top node does not need to be equal to the value of `*block*`. E.g.
405when processing the bindings of a LET form, `*block*` is bound to the node
406of that LET, while the block is not considered 'in effect': that only happens
407until the body is being processed.")
408
409(defstruct node
410  form
411  children
412  (compiland *current-compiland*))
413;; No need for a special constructor: nobody instantiates
414;; nodes directly
415
416(declaim (inline add-node-child))
417(defun add-node-child (parent child)
418  "Add a child node to the `children` list of a parent node,
419if that parent belongs to the same compiland."
420  (when parent
421    (when (eq (node-compiland parent) *current-compiland*)
422      (push child (node-children parent)))))
423
424;; control-transferring blocks: TAGBODY, CATCH, to do: BLOCK
425
426(defstruct (control-transferring-node (:include node))
427  ;; If non-nil, the TAGBODY contains local blocks which "contaminate" the
428  ;; environment, with GO forms in them which target tags in this TAGBODY
429  ;; Non-nil if and only if the block doesn't modify the environment
430  needs-environment-restoration
431  )
432;; No need for a special constructor: nobody instantiates
433;; control-transferring-nodes directly
434
435(defstruct (tagbody-node (:conc-name tagbody-)
436                         (:include control-transferring-node)
437                         (:constructor %make-tagbody-node ()))
438  ;; True if a tag in this tagbody is the target of a non-local GO.
439  non-local-go-p
440  ;; Tags in the tagbody form; a list of tag structures
441  tags
442  ;; Contains a variable whose value uniquely identifies the
443  ;; lexical scope from this block, to be used by GO
444  id-variable)
445(defknown make-tagbody-node () t)
446(defun make-tagbody-node ()
447  (let ((block (%make-tagbody-node)))
448    (push block (compiland-blocks *current-compiland*))
449    (add-node-child *block* block)
450    block))
451
452(defstruct (catch-node (:conc-name catch-)
453                       (:include control-transferring-node)
454                       (:constructor %make-catch-node ()))
455  ;; The catch tag-form is evaluated, meaning we
456  ;; have no predefined value to store here
457  )
458(defknown make-catch-node () t)
459(defun make-catch-node ()
460  (let ((block (%make-catch-node)))
461    (push block (compiland-blocks *current-compiland*))
462    (add-node-child *block* block)
463    block))
464
465(defstruct (block-node (:conc-name block-)
466                       (:include control-transferring-node)
467                       (:constructor %make-block-node (name)))
468  name  ;; Block name
469  (exit (gensym))
470  target
471  ;; True if there is a non-local RETURN from this block.
472  non-local-return-p
473  ;; Contains a variable whose value uniquely identifies the
474  ;; lexical scope from this block, to be used by RETURN-FROM
475  id-variable
476  ;; A list of all RETURN-FROM value forms associated with this block
477  return-value-forms)
478
479(defknown make-block-node (t) t)
480(defun make-block-node (name)
481  (let ((block (%make-block-node name)))
482    (push block (compiland-blocks *current-compiland*))
483    (add-node-child *block* block)
484    block))
485
486(defstruct (jump-node (:conc-name jump-)
487                      (:include node)
488                      (:constructor
489                       %make-jump-node (non-local-p target-block target-tag)))
490  non-local-p
491  target-block
492  target-tag)
493(defun make-jump-node (form non-local-p target-block &optional target-tag)
494  (let ((node (%make-jump-node non-local-p target-block target-tag)))
495    ;; Don't push into compiland blocks, as this as a node rather than a block
496    (setf (node-form node) form)
497    (add-node-child *block* node)
498    node))
499
500
501;; binding blocks: LET, LET*, FLET, LABELS, M-V-B, PROGV, LOCALLY
502;;
503;; Binding blocks can carry references to local (optionally special) variable bindings,
504;;  contain free special bindings or both
505
506(defstruct (binding-node (:include node))
507  ;; number of the register of the saved dynamic env, or NIL if none
508  environment-register
509  ;; Not used for LOCALLY and FLET; LABELS uses vars to store its functions
510  vars
511  free-specials)
512;; nobody instantiates any binding nodes directly, so there's no reason
513;; to create a constructor with the approprate administration code
514
515(defstruct (let/let*-node (:conc-name let-)
516                          (:include binding-node)
517                          (:constructor %make-let/let*-node ())))
518(defknown make-let/let*-node () t)
519(defun make-let/let*-node ()
520  (let ((block (%make-let/let*-node)))
521    (push block (compiland-blocks *current-compiland*))
522    (add-node-child *block* block)
523    block))
524
525(defstruct (flet-node (:conc-name flet-)
526                      (:include binding-node)
527                      (:constructor %make-flet-node ())))
528(defknown make-flet-node () t)
529(defun make-flet-node ()
530  (let ((block (%make-flet-node)))
531    (push block (compiland-blocks *current-compiland*))
532    (add-node-child *block* block)
533    block))
534
535(defstruct (labels-node (:conc-name labels-)
536                        (:include binding-node)
537                        (:constructor %make-labels-node ())))
538(defknown make-labels-node () t)
539(defun make-labels-node ()
540  (let ((block (%make-labels-node)))
541    (push block (compiland-blocks *current-compiland*))
542    (add-node-child *block* block)
543    block))
544
545(defstruct (m-v-b-node (:conc-name m-v-b-)
546                       (:include binding-node)
547                       (:constructor %make-m-v-b-node ())))
548(defknown make-m-v-b-node () t)
549(defun make-m-v-b-node ()
550  (let ((block (%make-m-v-b-node)))
551    (push block (compiland-blocks *current-compiland*))
552    (add-node-child *block* block)
553    block))
554
555(defstruct (progv-node (:conc-name progv-)
556                       (:include binding-node)
557                       (:constructor %make-progv-node ())))
558(defknown make-progv-node () t)
559(defun make-progv-node ()
560  (let ((block (%make-progv-node)))
561    (push block (compiland-blocks *current-compiland*))
562    block))
563
564(defstruct (locally-node (:conc-name locally-)
565                         (:include binding-node)
566                         (:constructor %make-locally-node ())))
567(defknown make-locally-node () t)
568(defun make-locally-node ()
569  (let ((block (%make-locally-node)))
570    (push block (compiland-blocks *current-compiland*))
571    (add-node-child *block* block)
572    block))
573
574;; blocks requiring non-local exits: UNWIND-PROTECT, SYS:SYNCHRONIZED-ON
575
576(defstruct (protected-node (:include node)
577                           (:constructor %make-protected-node ())))
578(defknown make-protected-node () t)
579(defun make-protected-node ()
580  (let ((block (%make-protected-node)))
581    (push block (compiland-blocks *current-compiland*))
582    (add-node-child *block* block)
583    block))
584
585(defstruct (unwind-protect-node (:conc-name unwind-protect-)
586                                (:include protected-node)
587                                (:constructor %make-unwind-protect-node ())))
588(defknown make-unwind-protect-node () t)
589(defun make-unwind-protect-node ()
590  (let ((block (%make-unwind-protect-node)))
591    (push block (compiland-blocks *current-compiland*))
592    (add-node-child *block* block)
593    block))
594
595(defstruct (synchronized-node (:conc-name synchronized-)
596                              (:include protected-node)
597                              (:constructor %make-synchronized-node ())))
598(defknown make-synchronized-node () t)
599(defun make-synchronized-node ()
600  (let ((block (%make-synchronized-node)))
601    (push block (compiland-blocks *current-compiland*))
602    (add-node-child *block* block)
603    block))
604
605(defun find-block (name)
606  (dolist (block *blocks*)
607    (when (and (block-node-p block)
608               (eq name (block-name block)))
609      (return block))))
610
611(defun %find-enclosed-blocks (form)
612  "Helper function for `find-enclosed-blocks`, implementing the actual
613algorithm specified there."
614  (cond
615   ((node-p form) (list form))
616   ((atom form) nil)
617   (t
618    ;; We can't use MAPCAN or DOLIST here: they'll choke on dotted lists
619    (do* ((tail form (cdr tail))
620          blocks)
621         ((null tail) blocks)
622      (setf blocks
623            (nconc (%find-enclosed-blocks (if (consp tail)
624                                              (car tail) tail))
625                   blocks))
626      (when (not (listp tail))
627        (return blocks))))))
628
629(defun find-enclosed-blocks (form)
630  "Returns the immediate enclosed blocks by searching the form's subforms.
631
632More deeply nested blocks can be reached through the `node-children`
633field of the immediate enclosed blocks."
634  (when *blocks*
635    ;; when the innermost enclosing block doesn't have node-children,
636    ;;  there's really nothing to search for.
637    (let ((first-enclosing-block (car *blocks*)))
638      (when (and (eq *current-compiland*
639                     (node-compiland first-enclosing-block))
640                 (null (node-children first-enclosing-block)))
641        (return-from find-enclosed-blocks))))
642
643  (%find-enclosed-blocks form))
644
645
646(defun some-nested-block (predicate blocks)
647  "Applies `predicate` recursively to the `blocks` and its children,
648until predicate returns non-NIL, returning that value.
649
650`blocks` may be a single block or a list of blocks."
651  (when blocks
652    (some #'(lambda (b)
653              (or (funcall predicate b)
654                  (some-nested-block predicate (node-children b))))
655          (if (listp blocks)
656              blocks
657            (list blocks)))))
658
659(defknown node-constant-p (t) boolean)
660(defun node-constant-p (object)
661  (cond ((node-p object)
662         nil)
663        ((var-ref-p object)
664         nil)
665        ((constantp object)
666         t)
667        (t
668         nil)))
669
670(defknown block-requires-non-local-exit-p (t) boolean)
671(defun block-requires-non-local-exit-p (object)
672  "A block which *always* requires a 'non-local-exit' is a block which
673requires a transfer control exception to be thrown: e.g. Go and Return.
674
675Non-local exits are required by blocks which do more in their cleanup
676than just restore the lastSpecialBinding (= dynamic environment).
677"
678  (or (unwind-protect-node-p object)
679      (catch-node-p object)
680      (synchronized-node-p object)))
681
682(defun node-opstack-unsafe-p (node)
683  (or (when (jump-node-p node)
684        (let ((target-block (jump-target-block node)))
685          (and (null (jump-non-local-p node))
686               (eq (node-compiland target-block) *current-compiland*)
687               (member target-block *blocks*))))
688      (when (tagbody-node-p node) (tagbody-non-local-go-p node))
689      (when (block-node-p node) (block-non-local-return-p node))
690      (catch-node-p node)))
691
692(defknown block-creates-runtime-bindings-p (t) boolean)
693(defun block-creates-runtime-bindings-p (block)
694  ;; FIXME: This may be false, if the bindings to be
695  ;; created are a quoted list
696  (progv-node-p block))
697
698(defknown enclosed-by-runtime-bindings-creating-block-p (t) boolean)
699(defun enclosed-by-runtime-bindings-creating-block-p (outermost-block)
700  "Indicates whether the code being compiled/analyzed is enclosed in a
701block which creates special bindings at runtime."
702  (dolist (enclosing-block *blocks*)
703    (when (eq enclosing-block outermost-block)
704      (return-from enclosed-by-runtime-bindings-creating-block-p nil))
705    (when (block-creates-runtime-bindings-p enclosing-block)
706      (return-from enclosed-by-runtime-bindings-creating-block-p t))))
707
708(defknown enclosed-by-protected-block-p (&optional t) boolean)
709(defun enclosed-by-protected-block-p (&optional outermost-block)
710  "Indicates whether the code being compiled/analyzed is enclosed in
711a block which requires a non-local transfer of control exception to
712be generated.
713"
714  (dolist (enclosing-block *blocks*)
715    (when (eq enclosing-block outermost-block)
716      (return-from enclosed-by-protected-block-p nil))
717    (when (block-requires-non-local-exit-p enclosing-block)
718      (return-from enclosed-by-protected-block-p t))))
719
720(defknown enclosed-by-environment-setting-block-p (&optional t) boolean)
721(defun enclosed-by-environment-setting-block-p (&optional outermost-block)
722  (dolist (enclosing-block *blocks*)
723    (when (eq enclosing-block outermost-block)
724      (return nil))
725    (when (and (binding-node-p enclosing-block)
726               (binding-node-environment-register enclosing-block))
727      (return t))))
728
729(defknown environment-register-to-restore (&optional t) t)
730(defun environment-register-to-restore (&optional outermost-block)
731  "Returns the environment register which contains the
732saved environment from the outermost enclosing block:
733
734That's the one which contains the environment used in the outermost block."
735  (flet ((outermost-register (last-register block)
736           (when (eq block outermost-block)
737             (return-from environment-register-to-restore last-register))
738           (or (and (binding-node-p block)
739                    (binding-node-environment-register block))
740               last-register)))
741    (reduce #'outermost-register *blocks*
742            :initial-value nil)))
743
744(defstruct tag
745  ;; The symbol (or integer) naming the tag
746  name
747  ;; The symbol which is the jump target in JVM byte code
748  label
749  ;; The associated TAGBODY
750  block
751  (compiland *current-compiland*)
752  used
753  used-non-locally)
754
755(defknown find-tag (t) t)
756(defun find-tag (name)
757  (dolist (tag *visible-tags*)
758    (when (eql name (tag-name tag))
759      (return tag))))
760
761(defun process-ignore/ignorable (declaration names variables)
762  (when (memq declaration '(IGNORE IGNORABLE))
763    (let ((what (if (eq declaration 'IGNORE) "ignored" "ignorable")))
764      (dolist (name names)
765        (unless (and (consp name) (eq (car name) 'FUNCTION))
766          (let ((variable (find-variable name variables)))
767            (cond ((null variable)
768                   (compiler-style-warn "Declaring unknown variable ~S to be ~A."
769                                        name what))
770                  ((variable-special-p variable)
771                   (compiler-style-warn "Declaring special variable ~S to be ~A."
772                                        name what))
773                  ((eq declaration 'IGNORE)
774                   (setf (variable-ignore-p variable) t))
775                  (t
776                   (setf (variable-ignorable-p variable) t)))))))))
777
778(defun finalize-generic-functions ()
779  (dolist (sym '(make-instance
780                 initialize-instance
781                 shared-initialize))
782    (let ((gf (and (fboundp sym) (fdefinition sym))))
783      (when (typep gf 'generic-function)
784        (unless (compiled-function-p gf)
785          (mop::finalize-generic-function gf))))))
786
787(finalize-generic-functions)
788
789(provide 'jvm)
Note: See TracBrowser for help on using the repository browser.