[e7b2c5]: src / compiler / aliencomp.lisp Maximize Restore History

Download this file

aliencomp.lisp    812 lines (738 with data), 33.2 kB

  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
;;;; transforms and other stuff used to compile ALIEN operations
;;;; This software is part of the SBCL system. See the README file for
;;;; more information.
;;;;
;;;; This software is derived from the CMU CL system, which was
;;;; written at Carnegie Mellon University and released into the
;;;; public domain. The software is in the public domain and is
;;;; provided with absolutely no warranty. See the COPYING and CREDITS
;;;; files for more information.
(in-package "SB!C")
;;;; DEFKNOWNs
(defknown %sap-alien (system-area-pointer alien-type) alien-value
(flushable movable))
(defknown alien-sap (alien-value) system-area-pointer
(flushable movable))
(defknown slot (alien-value symbol) t
(flushable recursive))
(defknown %set-slot (alien-value symbol t) t
(recursive))
(defknown %slot-addr (alien-value symbol) (alien (* t))
(flushable movable recursive))
(defknown deref (alien-value &rest index) t
(flushable))
(defknown %set-deref (alien-value t &rest index) t
())
(defknown %deref-addr (alien-value &rest index) (alien (* t))
(flushable movable))
(defknown %heap-alien (heap-alien-info) t
(flushable))
(defknown %set-heap-alien (heap-alien-info t) t
())
(defknown %heap-alien-addr (heap-alien-info) (alien (* t))
(flushable movable))
(defknown make-local-alien (local-alien-info) t
())
(defknown note-local-alien-type (local-alien-info t) null
())
(defknown local-alien (local-alien-info t) t
(flushable))
(defknown %local-alien-forced-to-memory-p (local-alien-info) (member t nil)
(movable))
(defknown %set-local-alien (local-alien-info t t) t
())
(defknown %local-alien-addr (local-alien-info t) (alien (* t))
(flushable movable))
(defknown dispose-local-alien (local-alien-info t) t
())
(defknown %cast (alien-value alien-type) alien
(flushable movable))
(defknown naturalize (t alien-type) alien
(flushable movable))
(defknown deport (alien alien-type) t
(flushable movable))
(defknown deport-alloc (alien alien-type) t
(flushable movable))
(defknown extract-alien-value (system-area-pointer unsigned-byte alien-type) t
(flushable))
(defknown deposit-alien-value (system-area-pointer unsigned-byte alien-type t) t
())
(defknown alien-funcall (alien-value &rest *) *
(any recursive))
;;;; cosmetic transforms
(deftransform slot ((object slot)
((alien (* t)) symbol))
'(slot (deref object) slot))
(deftransform %set-slot ((object slot value)
((alien (* t)) symbol t))
'(%set-slot (deref object) slot value))
(deftransform %slot-addr ((object slot)
((alien (* t)) symbol))
'(%slot-addr (deref object) slot))
;;;; SLOT support
(defun find-slot-offset-and-type (alien slot)
(unless (constant-lvar-p slot)
(give-up-ir1-transform
"The slot is not constant, so access cannot be open coded."))
(let ((type (lvar-type alien)))
(unless (alien-type-type-p type)
(give-up-ir1-transform))
(let ((alien-type (alien-type-type-alien-type type)))
(unless (alien-record-type-p alien-type)
(give-up-ir1-transform))
(let* ((slot-name (lvar-value slot))
(field (find slot-name (alien-record-type-fields alien-type)
:key #'alien-record-field-name)))
(unless field
(abort-ir1-transform "~S doesn't have a slot named ~S"
alien
slot-name))
(values (alien-record-field-offset field)
(alien-record-field-type field))))))
#+nil ;; Shouldn't be necessary.
(defoptimizer (slot derive-type) ((alien slot))
(block nil
(catch 'give-up-ir1-transform
(multiple-value-bind (slot-offset slot-type)
(find-slot-offset-and-type alien slot)
(declare (ignore slot-offset))
(return (make-alien-type-type slot-type))))
*wild-type*))
(deftransform slot ((alien slot) * * :important t)
(multiple-value-bind (slot-offset slot-type)
(find-slot-offset-and-type alien slot)
`(extract-alien-value (alien-sap alien)
,slot-offset
',slot-type)))
#+nil ;; ### But what about coercions?
(defoptimizer (%set-slot derive-type) ((alien slot value))
(block nil
(catch 'give-up-ir1-transform
(multiple-value-bind (slot-offset slot-type)
(find-slot-offset-and-type alien slot)
(declare (ignore slot-offset))
(let ((type (make-alien-type-type slot-type)))
(assert-lvar-type value type)
(return type))))
*wild-type*))
(deftransform %set-slot ((alien slot value) * * :important t)
(multiple-value-bind (slot-offset slot-type)
(find-slot-offset-and-type alien slot)
`(deposit-alien-value (alien-sap alien)
,slot-offset
',slot-type
value)))
(defoptimizer (%slot-addr derive-type) ((alien slot))
(block nil
(catch 'give-up-ir1-transform
(multiple-value-bind (slot-offset slot-type)
(find-slot-offset-and-type alien slot)
(declare (ignore slot-offset))
(return (make-alien-type-type
(make-alien-pointer-type :to slot-type)))))
*wild-type*))
(deftransform %slot-addr ((alien slot) * * :important t)
(multiple-value-bind (slot-offset slot-type)
(find-slot-offset-and-type alien slot)
(/noshow "in DEFTRANSFORM %SLOT-ADDR, creating %SAP-ALIEN")
`(%sap-alien (sap+ (alien-sap alien) (/ ,slot-offset sb!vm:n-byte-bits))
',(make-alien-pointer-type :to slot-type))))
;;;; DEREF support
(defun find-deref-alien-type (alien)
(let ((alien-type (lvar-type alien)))
(unless (alien-type-type-p alien-type)
(give-up-ir1-transform))
(let ((alien-type (alien-type-type-alien-type alien-type)))
(if (alien-type-p alien-type)
alien-type
(give-up-ir1-transform)))))
(defun find-deref-element-type (alien)
(let ((alien-type (find-deref-alien-type alien)))
(typecase alien-type
(alien-pointer-type
(alien-pointer-type-to alien-type))
(alien-array-type
(alien-array-type-element-type alien-type))
(t
(give-up-ir1-transform)))))
(defun compute-deref-guts (alien indices)
(let ((alien-type (find-deref-alien-type alien)))
(typecase alien-type
(alien-pointer-type
(when (cdr indices)
(abort-ir1-transform "too many indices for pointer deref: ~W"
(length indices)))
(let ((element-type (alien-pointer-type-to alien-type)))
(unless element-type
(give-up-ir1-transform "unable to open code deref of wild pointer type"))
(if indices
(let ((bits (alien-type-bits element-type))
(alignment (alien-type-alignment element-type)))
(unless bits
(abort-ir1-transform "unknown element size"))
(unless alignment
(abort-ir1-transform "unknown element alignment"))
(values '(offset)
`(* offset
,(align-offset bits alignment))
element-type))
(values nil 0 element-type))))
(alien-array-type
(let* ((element-type (alien-array-type-element-type alien-type))
(bits (alien-type-bits element-type))
(alignment (alien-type-alignment element-type))
(dims (alien-array-type-dimensions alien-type)))
(unless (= (length indices) (length dims))
(give-up-ir1-transform "incorrect number of indices"))
(unless bits
(give-up-ir1-transform "Element size is unknown."))
(unless alignment
(give-up-ir1-transform "Element alignment is unknown."))
(if (null dims)
(values nil 0 element-type)
(let* ((arg (gensym))
(args (list arg))
(offsetexpr arg))
(dolist (dim (cdr dims))
(let ((arg (gensym)))
(push arg args)
(setf offsetexpr `(+ (* ,offsetexpr ,dim) ,arg))))
(values (reverse args)
`(* ,offsetexpr
,(align-offset bits alignment))
element-type)))))
(t
(abort-ir1-transform "~S not either a pointer or array type."
alien-type)))))
#+nil ;; Shouldn't be necessary.
(defoptimizer (deref derive-type) ((alien &rest noise))
(declare (ignore noise))
(block nil
(catch 'give-up-ir1-transform
(return (make-alien-type-type (find-deref-element-type alien))))
*wild-type*))
(deftransform deref ((alien &rest indices) * * :important t)
(multiple-value-bind (indices-args offset-expr element-type)
(compute-deref-guts alien indices)
`(lambda (alien ,@indices-args)
(extract-alien-value (alien-sap alien)
,offset-expr
',element-type))))
#+nil ;; ### Again, the value might be coerced.
(defoptimizer (%set-deref derive-type) ((alien value &rest noise))
(declare (ignore noise))
(block nil
(catch 'give-up-ir1-transform
(let ((type (make-alien-type-type
(make-alien-pointer-type
:to (find-deref-element-type alien)))))
(assert-lvar-type value type)
(return type)))
*wild-type*))
(deftransform %set-deref ((alien value &rest indices) * * :important t)
(multiple-value-bind (indices-args offset-expr element-type)
(compute-deref-guts alien indices)
`(lambda (alien value ,@indices-args)
(deposit-alien-value (alien-sap alien)
,offset-expr
',element-type
value))))
(defoptimizer (%deref-addr derive-type) ((alien &rest noise))
(declare (ignore noise))
(block nil
(catch 'give-up-ir1-transform
(return (make-alien-type-type
(make-alien-pointer-type
:to (find-deref-element-type alien)))))
*wild-type*))
(deftransform %deref-addr ((alien &rest indices) * * :important t)
(multiple-value-bind (indices-args offset-expr element-type)
(compute-deref-guts alien indices)
(/noshow "in DEFTRANSFORM %DEREF-ADDR, creating (LAMBDA .. %SAP-ALIEN)")
`(lambda (alien ,@indices-args)
(%sap-alien (sap+ (alien-sap alien) (/ ,offset-expr sb!vm:n-byte-bits))
',(make-alien-pointer-type :to element-type)))))
;;;; support for aliens on the heap
(defun heap-alien-sap-and-type (info)
(unless (constant-lvar-p info)
(give-up-ir1-transform "info not constant; can't open code"))
(let ((info (lvar-value info)))
(values (heap-alien-info-sap-form info)
(heap-alien-info-type info))))
#+nil ; shouldn't be necessary
(defoptimizer (%heap-alien derive-type) ((info))
(block nil
(catch 'give-up
(multiple-value-bind (sap type) (heap-alien-sap-and-type info)
(declare (ignore sap))
(return (make-alien-type-type type))))
*wild-type*))
(deftransform %heap-alien ((info) * * :important t)
(multiple-value-bind (sap type) (heap-alien-sap-and-type info)
`(extract-alien-value ,sap 0 ',type)))
#+nil ;; ### Again, deposit value might change the type.
(defoptimizer (%set-heap-alien derive-type) ((info value))
(block nil
(catch 'give-up-ir1-transform
(multiple-value-bind (sap type) (heap-alien-sap-and-type info)
(declare (ignore sap))
(let ((type (make-alien-type-type type)))
(assert-lvar-type value type)
(return type))))
*wild-type*))
(deftransform %set-heap-alien ((info value) (heap-alien-info *) * :important t)
(multiple-value-bind (sap type) (heap-alien-sap-and-type info)
`(deposit-alien-value ,sap 0 ',type value)))
(defoptimizer (%heap-alien-addr derive-type) ((info))
(block nil
(catch 'give-up-ir1-transform
(multiple-value-bind (sap type) (heap-alien-sap-and-type info)
(declare (ignore sap))
(return (make-alien-type-type (make-alien-pointer-type :to type)))))
*wild-type*))
(deftransform %heap-alien-addr ((info) * * :important t)
(multiple-value-bind (sap type) (heap-alien-sap-and-type info)
(/noshow "in DEFTRANSFORM %HEAP-ALIEN-ADDR, creating %SAP-ALIEN")
`(%sap-alien ,sap ',(make-alien-pointer-type :to type))))
;;;; support for local (stack or register) aliens
(deftransform make-local-alien ((info) * * :important t)
(unless (constant-lvar-p info)
(abort-ir1-transform "Local alien info isn't constant?"))
(let* ((info (lvar-value info))
(alien-type (local-alien-info-type info))
(bits (alien-type-bits alien-type)))
(unless bits
(abort-ir1-transform "unknown size: ~S" (unparse-alien-type alien-type)))
(/noshow "in DEFTRANSFORM MAKE-LOCAL-ALIEN" info)
(/noshow (local-alien-info-force-to-memory-p info))
(/noshow alien-type (unparse-alien-type alien-type) (alien-type-bits alien-type))
(if (local-alien-info-force-to-memory-p info)
#!+(or x86 x86-64)
`(%primitive alloc-alien-stack-space
,(ceiling (alien-type-bits alien-type)
sb!vm:n-byte-bits))
#!-(or x86 x86-64)
`(%primitive alloc-number-stack-space
,(ceiling (alien-type-bits alien-type)
sb!vm:n-byte-bits))
(let* ((alien-rep-type-spec (compute-alien-rep-type alien-type))
(alien-rep-type (specifier-type alien-rep-type-spec)))
(cond ((csubtypep (specifier-type 'system-area-pointer)
alien-rep-type)
'(int-sap 0))
((ctypep 0 alien-rep-type) 0)
((ctypep 0.0f0 alien-rep-type) 0.0f0)
((ctypep 0.0d0 alien-rep-type) 0.0d0)
(t
(compiler-error
"Aliens of type ~S cannot be represented immediately."
(unparse-alien-type alien-type))))))))
(deftransform note-local-alien-type ((info var) * * :important t)
;; FIXME: This test and error occur about a zillion times. They
;; could be factored into a function.
(unless (constant-lvar-p info)
(abort-ir1-transform "Local alien info isn't constant?"))
(let ((info (lvar-value info)))
(/noshow "in DEFTRANSFORM NOTE-LOCAL-ALIEN-TYPE" info)
(/noshow (local-alien-info-force-to-memory-p info))
(unless (local-alien-info-force-to-memory-p info)
(let ((var-node (lvar-uses var)))
(/noshow var-node (ref-p var-node))
(when (ref-p var-node)
(propagate-to-refs (ref-leaf var-node)
(specifier-type
(compute-alien-rep-type
(local-alien-info-type info))))))))
nil)
(deftransform local-alien ((info var) * * :important t)
(unless (constant-lvar-p info)
(abort-ir1-transform "Local alien info isn't constant?"))
(let* ((info (lvar-value info))
(alien-type (local-alien-info-type info)))
(/noshow "in DEFTRANSFORM LOCAL-ALIEN" info alien-type)
(/noshow (local-alien-info-force-to-memory-p info))
(if (local-alien-info-force-to-memory-p info)
`(extract-alien-value var 0 ',alien-type)
`(naturalize var ',alien-type))))
(deftransform %local-alien-forced-to-memory-p ((info) * * :important t)
(unless (constant-lvar-p info)
(abort-ir1-transform "Local alien info isn't constant?"))
(let ((info (lvar-value info)))
(local-alien-info-force-to-memory-p info)))
(deftransform %set-local-alien ((info var value) * * :important t)
(unless (constant-lvar-p info)
(abort-ir1-transform "Local alien info isn't constant?"))
(let* ((info (lvar-value info))
(alien-type (local-alien-info-type info)))
(if (local-alien-info-force-to-memory-p info)
`(deposit-alien-value var 0 ',alien-type value)
'(error "This should be eliminated as dead code."))))
(defoptimizer (%local-alien-addr derive-type) ((info var))
(if (constant-lvar-p info)
(let* ((info (lvar-value info))
(alien-type (local-alien-info-type info)))
(make-alien-type-type (make-alien-pointer-type :to alien-type)))
*wild-type*))
(deftransform %local-alien-addr ((info var) * * :important t)
(unless (constant-lvar-p info)
(abort-ir1-transform "Local alien info isn't constant?"))
(let* ((info (lvar-value info))
(alien-type (local-alien-info-type info)))
(/noshow "in DEFTRANSFORM %LOCAL-ALIEN-ADDR, creating %SAP-ALIEN")
(if (local-alien-info-force-to-memory-p info)
`(%sap-alien var ',(make-alien-pointer-type :to alien-type))
(error "This shouldn't happen."))))
(deftransform dispose-local-alien ((info var) * * :important t)
(unless (constant-lvar-p info)
(abort-ir1-transform "Local alien info isn't constant?"))
(let* ((info (lvar-value info))
(alien-type (local-alien-info-type info)))
(if (local-alien-info-force-to-memory-p info)
#!+(or x86 x86-64) `(%primitive dealloc-alien-stack-space
,(ceiling (alien-type-bits alien-type)
sb!vm:n-byte-bits))
#!-(or x86 x86-64) `(%primitive dealloc-number-stack-space
,(ceiling (alien-type-bits alien-type)
sb!vm:n-byte-bits))
nil)))
;;;; %CAST
(defoptimizer (%cast derive-type) ((alien type))
(or (when (constant-lvar-p type)
(let ((alien-type (lvar-value type)))
(when (alien-type-p alien-type)
(make-alien-type-type alien-type))))
*wild-type*))
(deftransform %cast ((alien target-type) * * :important t)
(unless (constant-lvar-p target-type)
(give-up-ir1-transform
"The alien type is not constant, so access cannot be open coded."))
(let ((target-type (lvar-value target-type)))
(cond ((or (alien-pointer-type-p target-type)
(alien-array-type-p target-type)
(alien-fun-type-p target-type))
`(naturalize (alien-sap alien) ',target-type))
(t
(abort-ir1-transform "cannot cast to alien type ~S" target-type)))))
;;;; ALIEN-SAP, %SAP-ALIEN, %ADDR, etc.
(deftransform alien-sap ((alien) * * :important t)
(let ((alien-node (lvar-uses alien)))
(typecase alien-node
(combination
(splice-fun-args alien '%sap-alien 2)
'(lambda (sap type)
(declare (ignore type))
sap))
(t
(give-up-ir1-transform)))))
(defoptimizer (%sap-alien derive-type) ((sap type))
(declare (ignore sap))
(if (constant-lvar-p type)
(make-alien-type-type (lvar-value type))
*wild-type*))
(deftransform %sap-alien ((sap type) * * :important t)
(give-up-ir1-transform
;; FIXME: The hardcoded newline here causes more-than-usually
;; screwed-up formatting of the optimization note output.
"could not optimize away %SAP-ALIEN: forced to do runtime ~@
allocation of alien-value structure"))
;;;; NATURALIZE/DEPORT/EXTRACT/DEPOSIT magic
(flet ((%computed-lambda (compute-lambda type)
(declare (type function compute-lambda))
(unless (constant-lvar-p type)
(give-up-ir1-transform
"The type is not constant at compile time; can't open code."))
(handler-case
(let ((result (funcall compute-lambda (lvar-value type))))
(/noshow "in %COMPUTED-LAMBDA" (lvar-value type) result)
result)
(error (condition)
(compiler-error "~A" condition)))))
(deftransform naturalize ((object type) * * :important t)
(%computed-lambda #'compute-naturalize-lambda type))
(deftransform deport ((alien type) * * :important t)
(%computed-lambda #'compute-deport-lambda type))
(deftransform deport-alloc ((alien type) * * :important t)
(%computed-lambda #'compute-deport-alloc-lambda type))
(deftransform extract-alien-value ((sap offset type) * * :important t)
(%computed-lambda #'compute-extract-lambda type))
(deftransform deposit-alien-value ((sap offset type value) * * :important t)
(%computed-lambda #'compute-deposit-lambda type)))
;;;; a hack to clean up divisions
(defun count-low-order-zeros (thing)
(typecase thing
(lvar
(if (constant-lvar-p thing)
(count-low-order-zeros (lvar-value thing))
(count-low-order-zeros (lvar-uses thing))))
(combination
(case (let ((name (lvar-fun-name (combination-fun thing))))
(or (modular-version-info name :untagged nil) name))
((+ -)
(let ((min most-positive-fixnum)
(itype (specifier-type 'integer)))
(dolist (arg (combination-args thing) min)
(if (csubtypep (lvar-type arg) itype)
(setf min (min min (count-low-order-zeros arg)))
(return 0)))))
(*
(let ((result 0)
(itype (specifier-type 'integer)))
(dolist (arg (combination-args thing) result)
(if (csubtypep (lvar-type arg) itype)
(setf result (+ result (count-low-order-zeros arg)))
(return 0)))))
(ash
(let ((args (combination-args thing)))
(if (= (length args) 2)
(let ((amount (second args)))
(if (constant-lvar-p amount)
(max (+ (count-low-order-zeros (first args))
(lvar-value amount))
0)
0))
0)))
(t
0)))
(integer
(if (zerop thing)
most-positive-fixnum
(do ((result 0 (1+ result))
(num thing (ash num -1)))
((logbitp 0 num) result))))
(cast
(count-low-order-zeros (cast-value thing)))
(t
0)))
(deftransform / ((numerator denominator) (integer integer))
"convert x/2^k to shift"
(unless (constant-lvar-p denominator)
(give-up-ir1-transform))
(let* ((denominator (lvar-value denominator))
(bits (1- (integer-length denominator))))
(unless (and (> denominator 0) (= (ash 1 bits) denominator))
(give-up-ir1-transform))
(let ((alignment (count-low-order-zeros numerator)))
(unless (>= alignment bits)
(give-up-ir1-transform))
`(ash numerator ,(- bits)))))
(deftransform ash ((value amount))
(let ((value-node (lvar-uses value)))
(unless (combination-p value-node)
(give-up-ir1-transform))
(let ((inside-fun-name (lvar-fun-name (combination-fun value-node))))
(multiple-value-bind (prototype width)
(modular-version-info inside-fun-name :untagged nil)
(unless (eq (or prototype inside-fun-name) 'ash)
(give-up-ir1-transform))
(when (and width (not (constant-lvar-p amount)))
(give-up-ir1-transform))
(let ((inside-args (combination-args value-node)))
(unless (= (length inside-args) 2)
(give-up-ir1-transform))
(let ((inside-amount (second inside-args)))
(unless (and (constant-lvar-p inside-amount)
(not (minusp (lvar-value inside-amount))))
(give-up-ir1-transform)))
(splice-fun-args value inside-fun-name 2)
(if width
`(lambda (value amount1 amount2)
(logand (ash value (+ amount1 amount2))
,(1- (ash 1 (+ width (lvar-value amount))))))
`(lambda (value amount1 amount2)
(ash value (+ amount1 amount2)))))))))
;;;; ALIEN-FUNCALL support
(deftransform alien-funcall ((function &rest args)
((alien (* t)) &rest *) *
:important t)
(let ((names (make-gensym-list (length args))))
(/noshow "entering first DEFTRANSFORM ALIEN-FUNCALL" function args)
`(lambda (function ,@names)
(alien-funcall (deref function) ,@names))))
;;; Frame pointer, program counter conses. In each thread it's bound
;;; locally or not bound at all.
(defvar *saved-fp-and-pcs*)
#!+:c-stack-is-control-stack
(declaim (inline invoke-with-saved-fp-and-pc))
#!+:c-stack-is-control-stack
(defun invoke-with-saved-fp-and-pc (fn)
(declare #-sb-xc-host (muffle-conditions compiler-note)
(optimize (speed 3)))
(let* ((fp-and-pc (cons (%caller-frame)
(sap-int (%caller-pc)))))
(declare (truly-dynamic-extent fp-and-pc))
(let ((*saved-fp-and-pcs* (if (boundp '*saved-fp-and-pcs*)
(cons fp-and-pc *saved-fp-and-pcs*)
(list fp-and-pc))))
(declare (truly-dynamic-extent *saved-fp-and-pcs*))
(funcall fn))))
(defun find-saved-fp-and-pc (fp)
(when (boundp '*saved-fp-and-pcs*)
(dolist (x *saved-fp-and-pcs*)
(when (#!+:stack-grows-downward-not-upward
sap>
#!-:stack-grows-downward-not-upward
sap<
(int-sap (get-lisp-obj-address (car x))) fp)
(return (values (car x) (cdr x)))))))
(deftransform alien-funcall ((function &rest args) * * :node node :important t)
(let ((type (lvar-type function)))
(unless (alien-type-type-p type)
(give-up-ir1-transform "can't tell function type at compile time"))
(/noshow "entering second DEFTRANSFORM ALIEN-FUNCALL" function)
(let ((alien-type (alien-type-type-alien-type type)))
(unless (alien-fun-type-p alien-type)
(give-up-ir1-transform))
(let ((arg-types (alien-fun-type-arg-types alien-type)))
(unless (= (length args) (length arg-types))
(abort-ir1-transform
"wrong number of arguments; expected ~W, got ~W"
(length arg-types)
(length args)))
(collect ((params) (deports))
(dolist (arg-type arg-types)
(let ((param (gensym)))
(params param)
(deports `(deport ,param ',arg-type))))
;; Build BODY from the inside out.
(let ((return-type (alien-fun-type-result-type alien-type))
;; Innermost, we DEPORT the parameters (e.g. by taking SAPs
;; to them) and do the call.
(body `(%alien-funcall (deport function ',alien-type)
',alien-type
,@(deports))))
;; Wrap that in a WITH-PINNED-OBJECTS to ensure the values
;; the SAPs are taken for won't be moved by the GC. (If
;; needed: some alien types won't need it).
(setf body `(maybe-with-pinned-objects ,(params) ,arg-types
,body))
;; Around that handle any memory allocation that's needed.
;; Mostly the DEPORT-ALLOC alien-type-methods are just an
;; identity operation, but for example for deporting a
;; Unicode string we need to convert the string into an
;; octet array. This step needs to be done before the pinning
;; to ensure we pin the right objects, so it can't be combined
;; with the deporting.
;; -- JES 2006-03-16
(loop for param in (params)
for arg-type in arg-types
do (setf body
`(let ((,param (deport-alloc ,param ',arg-type)))
,body)))
(if (alien-values-type-p return-type)
(collect ((temps) (results))
(dolist (type (alien-values-type-values return-type))
(let ((temp (gensym)))
(temps temp)
(results `(naturalize ,temp ',type))))
(setf body
`(multiple-value-bind ,(temps) ,body
(values ,@(results)))))
(setf body `(naturalize ,body ',return-type)))
;; Remember this frame to make sure that we can get back
;; to it later regardless of how the foreign stack looks
;; like.
#!+:c-stack-is-control-stack
(when (policy node (= 3 alien-funcall-saves-fp-and-pc))
(setf body `(invoke-with-saved-fp-and-pc (lambda () ,body))))
(/noshow "returning from DEFTRANSFORM ALIEN-FUNCALL" (params) body)
`(lambda (function ,@(params))
(declare (optimize (let-conversion 3)))
,body)))))))
(defoptimizer (%alien-funcall derive-type) ((function type &rest args))
(declare (ignore function args))
(unless (constant-lvar-p type)
(error "Something is broken."))
(let ((type (lvar-value type)))
(unless (alien-fun-type-p type)
(error "Something is broken."))
(values-specifier-type
(compute-alien-rep-type
(alien-fun-type-result-type type)
:result))))
(defoptimizer (%alien-funcall ltn-annotate)
((function type &rest args) node ltn-policy)
(setf (basic-combination-info node) :funny)
(setf (node-tail-p node) nil)
(annotate-ordinary-lvar function)
(dolist (arg args)
(annotate-ordinary-lvar arg)))
;;; We support both the stdcall and cdecl calling conventions on win32 by
;;; resetting ESP after the foreign function returns. This way it works
;;; correctly whether the party that is supposed to pop arguments from
;;; the stack is the caller (cdecl) or the callee (stdcall).
(defoptimizer (%alien-funcall ir2-convert)
((function type &rest args) call block)
(let ((type (if (constant-lvar-p type)
(lvar-value type)
(error "Something is broken.")))
(lvar (node-lvar call))
(args args)
#!+x86
(stack-pointer (make-stack-pointer-tn)))
(multiple-value-bind (nsp stack-frame-size arg-tns result-tns)
(make-call-out-tns type)
#!+x86
(progn
(vop set-fpu-word-for-c call block)
(vop current-stack-pointer call block stack-pointer))
(vop alloc-number-stack-space call block stack-frame-size nsp)
(dolist (tn arg-tns)
;; On PPC, TN might be a list. This is used to indicate
;; something special needs to happen. See below.
;;
;; FIXME: We should implement something better than this.
(let* ((first-tn (if (listp tn) (car tn) tn))
(arg (pop args))
(sc (tn-sc first-tn))
(scn (sc-number sc))
#!-(or x86 x86-64) (temp-tn (make-representation-tn
(tn-primitive-type first-tn) scn))
(move-arg-vops (svref (sc-move-arg-vops sc) scn)))
(aver arg)
(unless (= (length move-arg-vops) 1)
(error "no unique move-arg-vop for moves in SC ~S" (sc-name sc)))
#!+(or x86 x86-64) (emit-move-arg-template call
block
(first move-arg-vops)
(lvar-tn call block arg)
nsp
first-tn)
#!-(or x86 x86-64) (progn
(emit-move call
block
(lvar-tn call block arg)
temp-tn)
(emit-move-arg-template call
block
(first move-arg-vops)
temp-tn
nsp
first-tn))
#!+(and ppc darwin)
(when (listp tn)
;; This means that we have a float arg that we need to
;; also copy to some int regs. The list contains the TN
;; for the float as well as the TNs to use for the int
;; arg.
(destructuring-bind (float-tn i1-tn &optional i2-tn)
tn
(if i2-tn
(vop sb!vm::move-double-to-int-arg call block
float-tn i1-tn i2-tn)
(vop sb!vm::move-single-to-int-arg call block
float-tn i1-tn))))))
(aver (null args))
(unless (listp result-tns)
(setf result-tns (list result-tns)))
(let ((arg-tns (flatten-list arg-tns)))
(vop* call-out call block
((lvar-tn call block function)
(reference-tn-list arg-tns nil))
((reference-tn-list result-tns t))))
#!-x86
(vop dealloc-number-stack-space call block stack-frame-size)
#!+x86
(progn
(vop reset-stack-pointer call block stack-pointer)
(vop set-fpu-word-for-lisp call block))
(move-lvar-result call block result-tns lvar))))