tests/dynamic-extent.impure.lisp

   1 ;;;; tests that dynamic-extent functionality works.
   2
   3 ;;;; This software is part of the SBCL system. See the README file for
   4 ;;;; more information.
   5 ;;;;
   6 ;;;; While most of SBCL is derived from the CMU CL system, the test
   7 ;;;; files (like this one) were written from scratch after the fork
   8 ;;;; from CMU CL.
   9 ;;;;
  10 ;;;; This software is in the public domain and is provided with
  11 ;;;; absolutely no warranty. See the COPYING and CREDITS files for
  12 ;;;; more information.
  13
  14 (when (eq sb-ext:*evaluator-mode* :interpret)
  15   (sb-ext:exit :code 104))
  16
  17 (load "compiler-test-util.lisp")
  18 (use-package :ctu)
  19
  20 (setq sb-c::*check-consistency* t
  21       sb-ext:*stack-allocate-dynamic-extent* t)
  22
  23 (defun crashme (a)
  24   (declare (optimize (speed 3) (safety 0) (space 0)))
  25   (declare (muffle-conditions style-warning)) ; re F1 and F2
  26   (restart-case
  27       (progn (ignore-errors (error "Foo")) (write-char #\.))
  28     (retry () (f1 a))
  29     (use-value (new) (f2 new))))
  30
  31 ;; lp#1530390
  32 (with-test (:name :do-not-dxify-restarts)
  33   (let ((a (make-array 100))) (unwind-protect (crashme 'bork) (fill a 0)))
  34   (let ((a (make-array 100))) (unwind-protect (crashme 'bork) (fill a 0)))
  35   (let ((a (make-array 100))) (unwind-protect (crashme 'bork) (fill a 0)))
  36   (let ((a (make-array 100))) (unwind-protect (crashme 'bork) (fill a 0)))
  37   )
  38
  39 (defmacro defun-with-dx (name arglist &body body)
  40   (let ((debug-name (sb-int:symbolicate name "-HIGH-DEBUG"))
  41         (default-name (sb-int:symbolicate name "-DEFAULT")))
  42     `(progn
  43        (defun ,debug-name ,arglist
  44          (declare (optimize debug))
  45          ,@body)
  46        (defun ,default-name ,arglist
  47         ,@body)
  48        (defun ,name (&rest args)
  49          (apply #',debug-name args)
  50          (apply #',default-name args)))))
  51
  52 (declaim (notinline opaque-identity))
  53 (defun opaque-identity (x)
  54   x)
  55
  56 ;;; &REST lists
  57
  58 (defun-with-dx dxlength (&rest rest)
  59   (declare (dynamic-extent rest))
  60   (length rest))
  61
  62 (with-test (:name (:dx-&rest :basics))
  63   (assert (= (dxlength 1 2 3) 3))
  64   (assert (= (dxlength t t t t t t) 6))
  65   (assert (= (dxlength) 0)))
  66
  67 (defun callee (list)
  68   (destructuring-bind (a b c d e f &rest g) list
  69     (+ a b c d e f (length g))))
  70
  71 (defun-with-dx dxcaller (&rest rest)
  72   (declare (dynamic-extent rest))
  73   (callee rest))
  74
  75 (with-test (:name (:dx-&rest :pass-down-to-callee :tail-call))
  76   (assert (= (dxcaller 1 2 3 4 5 6 7) 22)))
  77
  78 (defun-with-dx dxcaller-align-1 (x &rest rest)
  79   (declare (dynamic-extent rest))
  80   (+ x (callee rest)))
  81
  82 (with-test (:name (:dx-&rest :pass-down-to-callee :non-tail-call))
  83   (assert (= (dxcaller-align-1 17 1 2 3 4 5 6 7) 39))
  84   (assert (= (dxcaller-align-1 17 1 2 3 4 5 6 7 8) 40)))
  85
  86 ;;; %NIP-VALUES
  87
  88 (defun-with-dx test-nip-values ()
  89   (flet ((bar (x &rest y)
  90            (declare (dynamic-extent y))
  91            (if (> x 0)
  92                (values x (length y))
  93                (values (car y)))))
  94     (multiple-value-call #'values
  95       (bar 1 2 3 4 5 6)
  96       (bar -1 'a 'b))))
  97
  98 (with-test (:name (:nip-values))
  99   (assert (equal (multiple-value-list (test-nip-values)) '(1 5 a))))
 100
 101 ;;; LET-variable substitution
 102
 103 (defun-with-dx test-let-var-subst1 (x)
 104   (let ((y (list x (1- x))))
 105     (opaque-identity :foo)
 106     (let ((z (the list y)))
 107       (declare (dynamic-extent z))
 108       (length z))))
 109
 110 (with-test (:name (:let-variable-substitution))
 111   (assert (eql (test-let-var-subst1 17) 2)))
 112
 113 (defun-with-dx test-let-var-subst2 (x)
 114   (let ((y (list x (1- x))))
 115     (declare (dynamic-extent y))
 116     (opaque-identity :foo)
 117     (let ((z (the list y)))
 118       (length z))))
 119
 120 (with-test (:name (:let-variable-substitution-2))
 121   (assert (eql (test-let-var-subst2 17) 2)))
 122
 123
 124 ;;; DX propagation through LET-return.
 125
 126 (defun-with-dx test-lvar-subst (x)
 127   (let ((y (list x (1- x))))
 128     (declare (dynamic-extent y))
 129     (second (let ((z (the list y)))
 130               (opaque-identity :foo)
 131               z))))
 132
 133 (with-test (:name (:dx-propagation-through-let-return))
 134   (assert (eql (test-lvar-subst 11) 10)))
 135
 136 ;;; this code is incorrect, but the compiler should not fail
 137 (defun-with-dx test-let-var-subst-incorrect (x)
 138   (let ((y (list x (1- x))))
 139     (opaque-identity :foo)
 140     (let ((z (the list y)))
 141       (declare (dynamic-extent z))
 142       (opaque-identity :bar)
 143       z)))
 144 \f
 145 ;;; alignment
 146
 147 (defvar *x*)
 148 (defun-with-dx test-alignment-dx-list (form)
 149   (multiple-value-prog1 (eval form)
 150     (let ((l (list 1 2 3 4)))
 151       (declare (dynamic-extent l))
 152       (setq *x* (copy-list l)))))
 153
 154 (with-test (:name (:dx-list :alignment))
 155   (dotimes (n 64)
 156     (let* ((res (loop for i below n collect i))
 157            (form `(values ,@res)))
 158       (assert (equal (multiple-value-list (test-alignment-dx-list form)) res))
 159       (assert (equal *x* '(1 2 3 4))))))
 160
 161 ;;; closure
 162
 163 (declaim (notinline true))
 164 (defun true (x)
 165   (declare (ignore x))
 166   t)
 167
 168 (defun-with-dx dxclosure (x)
 169   (flet ((f (y)
 170            (+ y x)))
 171     (declare (dynamic-extent #'f))
 172     (true #'f)))
 173
 174 (with-test (:name (:dx-closure))
 175   (assert (eq t (dxclosure 13))))
 176
 177 ;;; value-cells
 178
 179 (defun-with-dx dx-value-cell (x)
 180   ;; Not implemented everywhere, yet.
 181   #+(or x86 x86-64 mips hppa)
 182   (let ((cell x))
 183     (declare (sb-int:truly-dynamic-extent cell))
 184     (flet ((f ()
 185              (incf cell)))
 186       (declare (dynamic-extent #'f))
 187       (true #'f))))
 188
 189 ;;; CONS
 190
 191 (defun-with-dx cons-on-stack (x)
 192   (let ((cons (cons x x)))
 193     (declare (dynamic-extent cons))
 194     (true cons)
 195     nil))
 196
 197 ;;; MAKE-ARRAY
 198
 199 (defun force-make-array-on-stack (n)
 200   (declare (optimize safety))
 201   (let ((v (make-array (min n 1))))
 202     (declare (sb-int:truly-dynamic-extent v))
 203     (true v)
 204     (true v)
 205     nil))
 206
 207 (defun-with-dx make-array-on-stack-1 ()
 208   (let ((v (make-array '(42) :element-type 'single-float)))
 209     (declare (dynamic-extent v))
 210     (true v)
 211     (true v)
 212     nil))
 213
 214 (defun-with-dx make-array-on-stack-2 (n x)
 215   (declare (integer n))
 216   (let ((v (make-array n :initial-contents x)))
 217     (declare (sb-int:truly-dynamic-extent v))
 218     (true v)
 219     (true v)
 220     nil))
 221
 222 (defun-with-dx make-array-on-stack-3 (x y z)
 223   (let ((v (make-array 3
 224                        :element-type 'fixnum :initial-contents (list x y z)
 225                        :element-type t :initial-contents x)))
 226     (declare (sb-int:truly-dynamic-extent v))
 227     (true v)
 228     (true v)
 229     nil))
 230
 231 (defun-with-dx make-array-on-stack-4 ()
 232   (let ((v (make-array 3 :initial-contents '(1 2 3))))
 233     (declare (sb-int:truly-dynamic-extent v))
 234     (true v)
 235     (true v)
 236     nil))
 237
 238 (defun-with-dx make-array-on-stack-5 ()
 239   (let ((v (make-array 3 :initial-element 12 :element-type t)))
 240     (declare (sb-int:truly-dynamic-extent v))
 241     (true v)
 242     (true v)
 243     nil))
 244
 245 (defun-with-dx make-array-on-stack-6 ()
 246   (let ((v (make-array 3 :initial-element 12 :element-type '(unsigned-byte 8))))
 247     (declare (sb-int:truly-dynamic-extent v))
 248     (true v)
 249     (true v)
 250     nil))
 251
 252 (defun-with-dx make-array-on-stack-7 ()
 253   (let ((v (make-array 3 :initial-element 12 :element-type '(signed-byte 8))))
 254     (declare (sb-int:truly-dynamic-extent v))
 255     (true v)
 256     (true v)
 257     nil))
 258
 259 (defun-with-dx make-array-on-stack-8 ()
 260   (let ((v (make-array 3 :initial-element 12 :element-type 'word)))
 261     (declare (sb-int:truly-dynamic-extent v))
 262     (true v)
 263     (true v)
 264     nil))
 265
 266 (defun-with-dx make-array-on-stack-9 ()
 267   (let ((v (make-array 3 :initial-element 12.0 :element-type 'single-float)))
 268     (declare (sb-int:truly-dynamic-extent v))
 269     (true v)
 270     (true v)
 271     nil))
 272
 273 (defun-with-dx make-array-on-stack-10 ()
 274   (let ((v (make-array 3 :initial-element 12.0d0 :element-type 'double-float)))
 275     (declare (sb-int:truly-dynamic-extent v))
 276     (true v)
 277     (true v)
 278     nil))
 279
 280 (defun-with-dx make-array-on-stack-11 ()
 281   (let ((v (make-array (the integer (opaque-identity 3)) :initial-element 12.0d0 :element-type 'double-float)))
 282     (declare (sb-int:truly-dynamic-extent v))
 283     (true v)
 284     (true v)
 285     nil))
 286
 287 (defun-with-dx vector-on-stack (x y)
 288   (let ((v (vector 1 x 2 y 3)))
 289     (declare (sb-int:truly-dynamic-extent v))
 290     (true v)
 291     nil))
 292
 293 (defun-with-dx make-3d-fixed-array-on-stack-1 ()
 294   (let ((a (make-array '(4 8 3) :initial-element 12 :element-type t)))
 295     (declare (sb-int:truly-dynamic-extent a))
 296     (true a)
 297     (true a)
 298     nil))
 299 (defun-with-dx make-3d-fixed-array-on-stack-2 (a b c d)
 300   (sb-int:dx-let ((a (make-array '(2 2 1)
 301                                  :element-type 'bit
 302                                  :initial-contents `(#((,a) (,b)) (#(,c) (,d))))))
 303     (true a)
 304     (true a)
 305     nil))
 306
 307 (defun-with-dx make-2d-variable-array-on-stack ()
 308   (let* ((n (opaque-identity 5))
 309          (a (make-array `(,n 2) :initial-element 12 :element-type t)))
 310     (declare (sb-int:truly-dynamic-extent a))
 311     (true a)
 312     (true a)
 313     nil))
 314
 315 (defun 2d-array-initializer (n)
 316   (ecase n
 317     (1 '((a)))
 318     (2 '((a b) (c d)))
 319     (3 '((a b c) (c d e) (f g h)))))
 320
 321 (defun-with-dx make-2d-array-function-initializer (n)
 322   (let* ((x (opaque-identity n))
 323          (y (opaque-identity x))
 324          (a (make-array `(,x ,y) :initial-contents (2d-array-initializer x))))
 325     (declare (sb-int:truly-dynamic-extent a))
 326     (true a)
 327     (true a)
 328     nil))
 329
 330 ;;; MAKE-LIST
 331
 332 (declaim (inline make-list-container))
 333 (defstruct list-container listy-slot)
 334 (defun make-var-length-dx-list (n thunk)
 335   (sb-int:dx-let ((s (make-list-container :listy-slot (make-list n))))
 336     (funcall thunk s)))
 337 ;; :stack-allocatable-lists is necessary but not sufficient
 338 (with-test (:name (:dx-list :make-list) :skipped-on '(not :x86-64))
 339   (assert (null (ctu:find-named-callees #'make-var-length-dx-list)))
 340   (assert-no-consing (make-var-length-dx-list
 341                       50 (lambda (x) (declare (ignore x))))))
 342
 343 ;;; MAKE-STRUCTURE
 344
 345 (declaim (inline make-fp-struct-1))
 346 (defstruct fp-struct-1
 347   (s 0.0 :type single-float)
 348   (d 0.0d0 :type double-float))
 349
 350 (defun-with-dx test-fp-struct-1.1 (s d)
 351   d
 352   (let ((fp (make-fp-struct-1 :s s)))
 353     (declare (dynamic-extent fp))
 354     (assert (eql s (fp-struct-1-s fp)))
 355     (assert (eql 0.0d0 (fp-struct-1-d fp)))))
 356
 357 (defun-with-dx test-fp-struct-1.2 (s d)
 358   s
 359   (let ((fp (make-fp-struct-1 :d d)))
 360     (declare (dynamic-extent fp))
 361     (assert (eql 0.0 (fp-struct-1-s fp)))
 362     (assert (eql d (fp-struct-1-d fp)))))
 363
 364 (defun-with-dx test-fp-struct-1.3 (s d)
 365   (let ((fp (make-fp-struct-1 :d d :s s)))
 366     (declare (dynamic-extent fp))
 367     (assert (eql s (fp-struct-1-s fp)))
 368     (assert (eql d (fp-struct-1-d fp)))))
 369
 370 (defun-with-dx test-fp-struct-1.4 (s d)
 371   (let ((fp (make-fp-struct-1 :s s :d d)))
 372     (declare (dynamic-extent fp))
 373     (assert (eql s (fp-struct-1-s fp)))
 374     (assert (eql d (fp-struct-1-d fp)))))
 375
 376 (with-test (:name (:test-fp-struct-1.1))
 377   (test-fp-struct-1.1 123.456 876.243d0))
 378 (with-test (:name (:test-fp-struct-1.2))
 379   (test-fp-struct-1.2 123.456 876.243d0))
 380 (with-test (:name (:test-fp-struct-1.3))
 381   (test-fp-struct-1.3 123.456 876.243d0))
 382 (with-test (:name (:test-fp-struct-1.4))
 383   (test-fp-struct-1.4 123.456 876.243d0))
 384
 385 (declaim (inline make-fp-struct-2))
 386 (defstruct fp-struct-2
 387   (d 0.0d0 :type double-float)
 388   (s 0.0 :type single-float))
 389
 390 (defun-with-dx test-fp-struct-2.1 (s d)
 391   d
 392   (let ((fp (make-fp-struct-2 :s s)))
 393     (declare (dynamic-extent fp))
 394     (assert (eql s (fp-struct-2-s fp)))
 395     (assert (eql 0.0d0 (fp-struct-2-d fp)))))
 396
 397 (defun-with-dx test-fp-struct-2.2 (s d)
 398   s
 399   (let ((fp (make-fp-struct-2 :d d)))
 400     (declare (dynamic-extent fp))
 401     (assert (eql 0.0 (fp-struct-2-s fp)))
 402     (assert (eql d (fp-struct-2-d fp)))))
 403
 404 (defun-with-dx test-fp-struct-2.3 (s d)
 405   (let ((fp (make-fp-struct-2 :d d :s s)))
 406     (declare (dynamic-extent fp))
 407     (assert (eql s (fp-struct-2-s fp)))
 408     (assert (eql d (fp-struct-2-d fp)))))
 409
 410 (defun-with-dx test-fp-struct-2.4 (s d)
 411   (let ((fp (make-fp-struct-2 :s s :d d)))
 412     (declare (dynamic-extent fp))
 413     (assert (eql s (fp-struct-2-s fp)))
 414     (assert (eql d (fp-struct-2-d fp)))))
 415
 416 (with-test (:name (:test-fp-struct-2.1))
 417   (test-fp-struct-2.1 123.456 876.243d0))
 418 (with-test (:name (:test-fp-struct-2.2))
 419   (test-fp-struct-2.2 123.456 876.243d0))
 420 (with-test (:name (:test-fp-struct-2.3))
 421   (test-fp-struct-2.3 123.456 876.243d0))
 422 (with-test (:name (:test-fp-struct-2.4))
 423   (test-fp-struct-2.4 123.456 876.243d0))
 424
 425 (declaim (inline make-cfp-struct-1))
 426 (defstruct cfp-struct-1
 427   (s (complex 0.0) :type (complex single-float))
 428   (d (complex 0.0d0) :type (complex double-float)))
 429
 430 (defun-with-dx test-cfp-struct-1.1 (s d)
 431   d
 432   (let ((cfp (make-cfp-struct-1 :s s)))
 433     (declare (dynamic-extent cfp))
 434     (assert (eql s (cfp-struct-1-s cfp)))
 435     (assert (eql (complex 0.0d0) (cfp-struct-1-d cfp)))))
 436
 437 (defun-with-dx test-cfp-struct-1.2 (s d)
 438   s
 439   (let ((cfp (make-cfp-struct-1 :d d)))
 440     (declare (dynamic-extent cfp))
 441     (assert (eql (complex 0.0) (cfp-struct-1-s cfp)))
 442     (assert (eql d (cfp-struct-1-d cfp)))))
 443
 444 (defun-with-dx test-cfp-struct-1.3 (s d)
 445   (let ((cfp (make-cfp-struct-1 :d d :s s)))
 446     (declare (dynamic-extent cfp))
 447     (assert (eql s (cfp-struct-1-s cfp)))
 448     (assert (eql d (cfp-struct-1-d cfp)))))
 449
 450 (defun-with-dx test-cfp-struct-1.4 (s d)
 451   (let ((cfp (make-cfp-struct-1 :s s :d d)))
 452     (declare (dynamic-extent cfp))
 453     (assert (eql s (cfp-struct-1-s cfp)))
 454     (assert (eql d (cfp-struct-1-d cfp)))))
 455
 456 (with-test (:name (:test-cfp-struct-1.1))
 457   (test-cfp-struct-1.1 (complex 0.123 123.456) (complex 908132.41d0 876.243d0)))
 458 (with-test (:name (:test-cfp-struct-1.2))
 459   (test-cfp-struct-1.2 (complex 0.123 123.456) (complex 908132.41d0 876.243d0)))
 460 (with-test (:name (:test-cfp-struct-1.3))
 461   (test-cfp-struct-1.3 (complex 0.123 123.456) (complex 908132.41d0 876.243d0)))
 462 (with-test (:name (:test-cfp-struct-1.4))
 463   (test-cfp-struct-1.4 (complex 0.123 123.456) (complex 908132.41d0 876.243d0)))
 464
 465 (declaim (inline make-cfp-struct-2))
 466 (defstruct cfp-struct-2
 467   (d (complex 0.0d0) :type (complex double-float))
 468   (s (complex 0.0) :type (complex single-float)))
 469
 470 (defun-with-dx test-cfp-struct-2.1 (s d)
 471   d
 472   (let ((cfp (make-cfp-struct-2 :s s)))
 473     (declare (dynamic-extent cfp))
 474     (assert (eql s (cfp-struct-2-s cfp)))
 475     (assert (eql (complex 0.0d0) (cfp-struct-2-d cfp)))))
 476
 477 (defun-with-dx test-cfp-struct-2.2 (s d)
 478   s
 479   (let ((cfp (make-cfp-struct-2 :d d)))
 480     (declare (dynamic-extent cfp))
 481     (assert (eql (complex 0.0) (cfp-struct-2-s cfp)))
 482     (assert (eql d (cfp-struct-2-d cfp)))))
 483
 484 (defun-with-dx test-cfp-struct-2.3 (s d)
 485   (let ((cfp (make-cfp-struct-2 :d d :s s)))
 486     (declare (dynamic-extent cfp))
 487     (assert (eql s (cfp-struct-2-s cfp)))
 488     (assert (eql d (cfp-struct-2-d cfp)))))
 489
 490 (defun-with-dx test-cfp-struct-2.4 (s d)
 491   (let ((cfp (make-cfp-struct-2 :s s :d d)))
 492     (declare (dynamic-extent cfp))
 493     (assert (eql s (cfp-struct-2-s cfp)))
 494     (assert (eql d (cfp-struct-2-d cfp)))))
 495
 496 (with-test (:name (:test-cfp-struct-2.1))
 497   (test-cfp-struct-2.1 (complex 0.123 123.456) (complex 908132.41d0 876.243d0)))
 498 (with-test (:name (:test-cfp-struct-2.2))
 499   (test-cfp-struct-2.2 (complex 0.123 123.456) (complex 908132.41d0 876.243d0)))
 500 (with-test (:name (:test-cfp-struct-2.3))
 501   (test-cfp-struct-2.3 (complex 0.123 123.456) (complex 908132.41d0 876.243d0)))
 502 (with-test (:name (:test-cfp-struct-2.4))
 503   (test-cfp-struct-2.4 (complex 0.123 123.456) (complex 908132.41d0 876.243d0)))
 504
 505 ;; It works to declare a structure constructor INLINE after the DEFSTRUCT
 506 ;; was processed, as long as it was in the null lexical environment.
 507 ;; In a perfect world, we'd figure out that a variable declared DX which
 508 ;; receives the value of a structure constructor defined in the same file
 509 ;; and neither expressly INLINE nor NOTINLINE should be locally inlined.
 510 ;; But at least this shows that a declaration at the intended use point
 511 ;; is sufficient, without also a bracketing INLINE/NOTINLINE at the DEFSTRUCT.
 512
 513 ;; Verify the precondition for the assertions that claim that DXifying works
 514 ;; even though the MAKE- function was not expressly INLINE when its DEFSTRUCT
 515 ;; was compiled.
 516 (dolist (s '(make-foo1 make-foo2 make-foo3))
 517   (assert (null (sb-int:info :function :inline-expansion-designator s))))
 518
 519 (defstruct foo1 x)
 520
 521 (defun-with-dx make-foo1-on-stack (x)
 522   (declare (inline make-foo1))
 523   (let ((foo (make-foo1 :x x)))
 524     (declare (dynamic-extent foo))
 525     (assert (eql x (foo1-x foo)))))
 526
 527 (defstruct foo2
 528   (x 0.0 :type single-float)
 529   (y 0.0d0 :type double-float)
 530   a
 531   b
 532   c)
 533
 534 (defun-with-dx make-foo2-on-stack (x y)
 535   (declare (inline make-foo2))
 536   x
 537   (let ((foo (make-foo2 :y y :c 'c)))
 538     (declare (dynamic-extent foo))
 539     (assert (eql 0.0 (foo2-x foo)))
 540     (assert (eql y (foo2-y foo)))
 541     (assert (eql 'c (foo2-c foo)))
 542     (assert (eql nil (foo2-b foo)))))
 543
 544 ;;; Check that constants work out as argument for all relevant
 545 ;;; slot types.
 546 (defstruct foo3
 547   (a 0 :type t)
 548   (b 1 :type fixnum)
 549   (c 2 :type sb-vm:word)
 550   (d 3.0 :type single-float)
 551   (e 4.0d0 :type double-float))
 552
 553 (defun-with-dx make-foo3-on-stack ()
 554   (declare (inline make-foo3))
 555   (let ((foo (make-foo3)))
 556     (declare (dynamic-extent foo))
 557     (assert (eql 0 (foo3-a foo)))
 558     (assert (eql 1 (foo3-b foo)))
 559     (assert (eql 2 (foo3-c foo)))
 560     (assert (eql 3.0 (foo3-d foo)))
 561     (assert (eql 4.0d0 (foo3-e foo)))))
 562
 563 ;;; Nested DX
 564
 565 (defun-with-dx nested-dx-lists ()
 566   (let ((dx (list (list 1 2) (list 3 4))))
 567     (declare (dynamic-extent dx))
 568     (true dx)
 569     nil))
 570
 571 (defun-with-dx nested-dx-conses ()
 572   (let ((dx (cons 1 (cons 2 (cons 3 (cons (cons t t) nil))))))
 573     (declare (dynamic-extent dx))
 574     (true dx)
 575     nil))
 576
 577 (defun-with-dx nested-dx-not-used (x)
 578   (declare (list x))
 579   (let ((l (setf (car x) (list x x x))))
 580     (declare (dynamic-extent l))
 581     (true l)
 582     (true (length l))
 583     nil))
 584
 585 (defun-with-dx nested-evil-dx-used (x)
 586   (declare (list x))
 587   (let ((l (list x x x)))
 588     (declare (dynamic-extent l))
 589     (unwind-protect
 590          (progn
 591            (setf (car x) l)
 592            (true l))
 593       (setf (car x) nil))
 594     nil))
 595
 596 (defparameter *bar* nil)
 597 (declaim (inline make-nested-bad make-nested-good))
 598 (defstruct (nested (:constructor make-nested-bad (&key bar &aux (bar (setf *bar* bar))))
 599                    (:constructor make-nested-good (&key bar)))
 600   bar)
 601
 602 (defun-with-dx nested-good (y)
 603   (let ((x (list (list (make-nested-good :bar (list (list (make-nested-good :bar (list y)))))))))
 604     (declare (dynamic-extent x))
 605     (true x)))
 606
 607 (defun-with-dx nested-bad (y)
 608   (let ((x (list (list (make-nested-bad :bar (list (list (make-nested-bad :bar (list y)))))))))
 609     (declare (dynamic-extent x))
 610     (unless (equalp (caar x) (make-nested-good :bar *bar*))
 611       (error "got ~S, wanted ~S" (caar x) (make-nested-good :bar *bar*)))
 612     ;; the NESTED instance itself *should* be DX!
 613     (copy-nested (caar x))))
 614
 615 (with-test (:name :conservative-nested-dx)
 616   ;; NESTED-BAD should not stack-allocate :BAR due to the SETF.
 617   (assert (equalp (nested-bad 42) (make-nested-good :bar *bar*)))
 618   (assert (equalp *bar* (list (list (make-nested-bad :bar (list 42)))))))
 619
 620 ;;; multiple uses for dx lvar
 621
 622 (defun-with-dx multiple-dx-uses ()
 623   (let ((dx (if (true t)
 624                 (list 1 2 3)
 625                 (list 2 3 4))))
 626     (declare (dynamic-extent dx))
 627     (true dx)
 628     nil))
 629
 630 ;;; mapfoo should make the initial cons dx
 631
 632 (defun mapcar-negate (x) (mapcar #'- x))
 633 (defun mapcan-reverse (x) (mapcan #'reverse x))
 634
 635 ;;; handler-case and handler-bind should use DX internally
 636
 637 (defun dx-handler-bind (x)
 638   (handler-bind ((error
 639                   #'(lambda (c)
 640                       (break "OOPS: ~S caused ~S" x c)))
 641                  ((and serious-condition (not error))
 642                   #'(lambda (c)
 643                       (break "OOPS2: ~S did ~S" x c))))
 644     (/ 2 x)))
 645
 646 (defun dx-handler-case (x)
 647   (assert (zerop (handler-case (/ 2 x)
 648                    (error (c)
 649                      (break "OOPS: ~S caused ~S" x c)
 650                      -1)
 651                    (:no-error (res)
 652                      (1- res))))))
 653
 654 (defun list-delete-some-stuff ()
 655   ;; opaque-identity hides the fact that we are calling a destructive function
 656   ;; on a constant, which is technically illegal. But no deletion occurs,
 657   ;; so it's innocuous. Also these aren't tests of DX, but oh well...
 658   (declare (muffle-conditions style-warning))
 659   (delete 'a (opaque-identity '(x y)))
 660   (delete 'a (opaque-identity '(x y)) :from-end t)
 661   (delete-duplicates (opaque-identity '(x y))))
 662
 663 (defvar *a-cons* (cons nil nil))
 664
 665 (with-test (:name (:no-consing :dx-closures) :skipped-on '(not :stack-allocatable-closures))
 666   (assert-no-consing (dxclosure 42)))
 667
 668 (with-test (:name (:no-consing :dx-lists)
 669             :skipped-on '(not (and :stack-allocatable-lists
 670                                :stack-allocatable-fixed-objects)))
 671   (assert-no-consing (dxlength 1 2 3))
 672   (assert-no-consing (dxlength t t t t t t))
 673   (assert-no-consing (dxlength))
 674   (assert-no-consing (dxcaller 1 2 3 4 5 6 7))
 675   (assert-no-consing (test-nip-values))
 676   (assert-no-consing (test-let-var-subst2 17))
 677   (assert-no-consing (test-lvar-subst 11))
 678   (assert-no-consing (nested-dx-lists))
 679   (assert-consing (nested-dx-not-used *a-cons*))
 680   (assert-no-consing (nested-evil-dx-used *a-cons*))
 681   (assert-no-consing (mapcar-negate nil))
 682   (assert-no-consing (mapcan-reverse nil))
 683   (assert-no-consing (list-delete-some-stuff))
 684   (assert-no-consing (multiple-dx-uses)))
 685
 686 (with-test (:name (:no-consing :dx-value-cell)
 687                   :skipped-on '(not :stack-allocatable-closures))
 688   (assert-no-consing (dx-value-cell 13)))
 689
 690 (with-test (:name (:no-consing :dx-fixed-objects)
 691                   :skipped-on '(not (and :stack-allocatable-fixed-objects
 692                                          :stack-allocatable-closures)))
 693   (assert-no-consing (cons-on-stack 42))
 694   (assert-no-consing (make-foo1-on-stack 123))
 695   (assert-no-consing (nested-good 42))
 696   (assert-no-consing (nested-dx-conses))
 697   (assert-no-consing (dx-handler-bind 2))
 698   (assert-no-consing (dx-handler-case 2)))
 699
 700 (with-test (:name (:no-consing :dx-vectors) :skipped-on '(not :stack-allocatable-vectors))
 701   (assert-no-consing (force-make-array-on-stack 128))
 702   (assert-no-consing (make-array-on-stack-2 5 '(1 2.0 3 4.0 5)))
 703   (assert-no-consing (make-array-on-stack-3 9 8 7))
 704   (assert-no-consing (make-array-on-stack-4))
 705   (assert-no-consing (make-array-on-stack-5))
 706   (assert-no-consing (vector-on-stack :x :y)))
 707
 708 (with-test (:name (:no-consing :dx-arrays) :skipped-on '(not :stack-allocatable-vectors))
 709   (assert-no-consing (make-3d-fixed-array-on-stack-1))
 710   (assert-no-consing (make-2d-variable-array-on-stack))
 711   (assert-no-consing (make-2d-array-function-initializer 1))
 712   (assert-no-consing (make-2d-array-function-initializer 2))
 713   (assert-no-consing (make-2d-array-function-initializer 3)))
 714
 715 (with-test (:name (:no-consing :dx-specialized-arrays)
 716             :skipped-on '(not (and :stack-allocatable-vectors
 717                                    :c-stack-is-control-stack)))
 718   (assert-no-consing (make-3d-fixed-array-on-stack-2 0 0 1 1)))
 719
 720 (with-test (:name (:no-consing :specialized-dx-vectors)
 721             :skipped-on `(not (and :stack-allocatable-vectors
 722                                    :c-stack-is-control-stack)))
 723   (assert-no-consing (make-array-on-stack-1))
 724   (assert-no-consing (make-array-on-stack-6))
 725   (assert-no-consing (make-array-on-stack-7))
 726   (assert-no-consing (make-array-on-stack-8))
 727   (assert-no-consing (make-array-on-stack-9))
 728   (assert-no-consing (make-array-on-stack-10))
 729   (assert-no-consing (make-array-on-stack-11)))
 730
 731 (with-test (:name (:no-consing :dx-raw-instances) :skipped-on '(or (not :raw-instance-init-vops)
 732                                                                    (not (and :gencgc :c-stack-is-control-stack))))
 733   (let (a b)
 734     (setf a 1.24 b 1.23d0)
 735     (assert-no-consing (make-foo2-on-stack a b)))
 736     (assert-no-consing (make-foo3-on-stack)))
 737
 738 ;;; not really DX, but GETHASH and (SETF GETHASH) should not cons
 739
 740 (defvar *table* (make-hash-table))
 741
 742 (defun test-hash-table ()
 743   (setf (gethash 5 *table*) 13)
 744   (gethash 5 *table*))
 745
 746 (with-test (:name (:no-consing :hash-tables))
 747   (assert-no-consing (test-hash-table)))
 748
 749 ;;; Both with-pinned-objects and without-gcing should not cons
 750
 751 (defun call-without-gcing (fun)
 752   (sb-sys:without-gcing (funcall fun)))
 753
 754 (defun call-with-pinned-object (fun obj)
 755   (sb-sys:with-pinned-objects (obj)
 756     (funcall fun obj)))
 757
 758 (with-test (:name (:no-consing :without-gcing))
 759   (assert-no-consing (call-without-gcing (lambda ()))))
 760
 761 (with-test (:name (:no-consing :with-pinned-objects))
 762   (assert-no-consing (call-with-pinned-object #'identity 42)))
 763
 764 ;;; with-mutex should use DX and not cons
 765
 766 (defvar *mutex* (sb-thread::make-mutex :name "mutexlock"))
 767
 768 (defun test-mutex ()
 769   (sb-thread:with-mutex (*mutex*)
 770     (true *mutex*)))
 771
 772 (with-test (:name (:no-consing :mutex) :skipped-on '(not :sb-thread))
 773   (assert-no-consing (test-mutex)))
 774 \f
 775
 776 ;;; Bugs found by Paul F. Dietz
 777
 778 (with-test (:name (:dx-bug-misc :pfdietz))
 779   (assert
 780    (eq
 781     (funcall
 782      (compile
 783       nil
 784       '(lambda (a b)
 785         (declare (optimize (speed 2) (space 0) (safety 0)
 786                   (debug 1) (compilation-speed 3)))
 787         (let* ((v5 (cons b b)))
 788           (declare (dynamic-extent v5))
 789           v5
 790           a)))
 791      'x 'y)
 792     'x)))
 793
 794 ;;; bug reported by Svein Ove Aas
 795 (defun svein-2005-ii-07 (x y)
 796   (declare (optimize (speed 3) (space 2) (safety 0) (debug 0)))
 797   (let ((args (list* y 1 2 x)))
 798     (declare (dynamic-extent args))
 799     (apply #'aref args)))
 800
 801 (with-test (:name (:dx-bugs-misc :svein-2005-ii-07))
 802   (assert (eql
 803            (svein-2005-ii-07
 804             '(0)
 805             #3A(((1 1 1) (1 1 1) (1 1 1))
 806                 ((1 1 1) (1 1 1) (4 1 1))
 807                 ((1 1 1) (1 1 1) (1 1 1))))
 808            4)))
 809
 810 ;;; bug reported by Brian Downing: stack-allocated arrays were not
 811 ;;; filled with zeroes.
 812 (defun-with-dx bdowning-2005-iv-16 ()
 813   (let ((a (make-array 11 :initial-element 0)))
 814     (declare (dynamic-extent a))
 815     (assert (every (lambda (x) (eql x 0)) a))))
 816
 817 (with-test (:name (:dx-bug-misc :bdowning-2005-iv-16))
 818   #+(or hppa mips x86 x86-64)
 819   (assert-no-consing (bdowning-2005-iv-16))
 820   (bdowning-2005-iv-16))
 821
 822 (declaim (inline my-nconc))
 823 (defun my-nconc (&rest lists)
 824   (declare (dynamic-extent lists))
 825   (apply #'nconc lists))
 826 (defun-with-dx my-nconc-caller (a b c)
 827   (let ((l1 (list a b c))
 828         (l2 (list a b c)))
 829     (my-nconc l1 l2)))
 830 (with-test (:name :rest-stops-the-buck)
 831   (let ((list1 (my-nconc-caller 1 2 3))
 832         (list2 (my-nconc-caller 9 8 7)))
 833     (assert (equal list1 '(1 2 3 1 2 3)))
 834     (assert (equal list2 '(9 8 7 9 8 7)))))
 835
 836 (defun-with-dx let-converted-vars-dx-allocated-bug (x y z)
 837   (let* ((a (list x y z))
 838          (b (list x y z))
 839          (c (list a b)))
 840     (declare (dynamic-extent c))
 841     (values (first c) (second c))))
 842 (with-test (:name :let-converted-vars-dx-allocated-bug)
 843   (multiple-value-bind (i j) (let-converted-vars-dx-allocated-bug 1 2 3)
 844     (assert (and (equal i j)
 845                  (equal i (list 1 2 3))))))
 846
 847 ;;; workaround for bug 419 -- real issue remains, but check that the
 848 ;;; bandaid holds.
 849 (defun-with-dx bug419 (x)
 850   (multiple-value-call #'list
 851     (eval '(values 1 2 3))
 852     (let ((x x))
 853       (declare (dynamic-extent x))
 854       (flet ((mget (y)
 855                (+ x y))
 856              (mset (z)
 857                (incf x z)))
 858         (declare (dynamic-extent #'mget #'mset))
 859         ((lambda (f g) (eval `(progn ,f ,g (values 4 5 6)))) #'mget #'mset)))))
 860
 861 (with-test (:name (:dx-bug-misc :bug419))
 862   (assert (equal (bug419 42) '(1 2 3 4 5 6))))
 863
 864 ;;; Multiple DX arguments in a local function call
 865 (defun test-dx-flet-test (fun n f1 f2 f3)
 866   (let ((res (with-output-to-string (s)
 867                (assert (eql n (ignore-errors (funcall fun s)))))))
 868     (multiple-value-bind (x pos) (read-from-string res nil)
 869       (assert (equalp f1 x))
 870       (multiple-value-bind (y pos2) (read-from-string res nil nil :start pos)
 871         (assert (equalp f2 y))
 872         (assert (equalp f3 (read-from-string res nil nil :start pos2))))))
 873   #+(or hppa mips x86 x86-64)
 874   (assert-no-consing (assert (eql n (funcall fun nil))))
 875   (assert (eql n (funcall fun nil))))
 876
 877 (macrolet ((def (n f1 f2 f3)
 878              (let ((name (sb-pcl::format-symbol :cl-user "DX-FLET-TEST.~A" n)))
 879                `(progn
 880                   (defun-with-dx ,name (s)
 881                     (flet ((f (x)
 882                              (declare (dynamic-extent x))
 883                              (when s
 884                                (print x s)
 885                                (finish-output s))
 886                              nil))
 887                       (f ,f1)
 888                       (f ,f2)
 889                       (f ,f3)
 890                       ,n))
 891                   (with-test (:name (:dx-flet-test ,n))
 892                     (test-dx-flet-test #',name ,n ,f1 ,f2 ,f3))))))
 893   (def 0 (list :one) (list :two) (list :three))
 894   (def 1 (make-array 128) (list 1 2 3 4 5 6 7 8) (list 'list))
 895   (def 2 (list 1) (list 2 3) (list 4 5 6 7)))
 896
 897 ;;; Test that unknown-values coming after a DX value won't mess up the
 898 ;;; stack analysis
 899 (defun test-update-uvl-live-sets (x y z)
 900  (declare (optimize speed (safety 0)))
 901  (flet ((bar (a b)
 902           (declare (dynamic-extent a))
 903           (eval `(list (length ',a) ',b))))
 904    (list (bar x y)
 905          (bar (list x y z)                  ; dx push
 906               (list
 907                (multiple-value-call 'list
 908                  (eval '(values 1 2 3))     ; uv push
 909                  (max y z)
 910                )                            ; uv pop
 911                14)
 912          ))))
 913
 914 (with-test (:name (:update-uvl-live-sets))
 915   (assert (equal '((0 4) (3 ((1 2 3 5) 14)))
 916                  (test-update-uvl-live-sets #() 4 5))))
 917
 918 (with-test (:name :regression-1.0.23.38)
 919   (compile nil '(lambda ()
 920                  (declare (muffle-conditions compiler-note))
 921                  (flet ((make (x y)
 922                           (let ((res (cons x x)))
 923                             (setf (cdr res) y)
 924                             res)))
 925                    (declare (inline make))
 926                    (let ((z (make 1 2)))
 927                      (declare (dynamic-extent z))
 928                      (print z)
 929                      t))))
 930   (compile nil '(lambda ()
 931                  (declare (muffle-conditions compiler-note))
 932                  (flet ((make (x y)
 933                           (let ((res (cons x x)))
 934                             (setf (cdr res) y)
 935                             (if x res y))))
 936                    (declare (inline make))
 937                    (let ((z (make 1 2)))
 938                      (declare (dynamic-extent z))
 939                      (print z)
 940                      t)))))
 941
 942 ;;; On x86 and x86-64 upto 1.0.28.16 LENGTH and WORDS argument
 943 ;;; tns to ALLOCATE-VECTOR-ON-STACK could be packed in the same
 944 ;;; location, leading to all manner of badness. ...reproducing this
 945 ;;; reliably is hard, but this it at least used to break on x86-64.
 946 (defun length-and-words-packed-in-same-tn (m)
 947   (declare (optimize speed (safety 0) (debug 0) (space 0)))
 948   (let ((array (make-array (max 1 m) :element-type 'fixnum)))
 949     (declare (dynamic-extent array))
 950     (array-total-size array)))
 951 (with-test (:name :length-and-words-packed-in-same-tn)
 952   (assert (= 1 (length-and-words-packed-in-same-tn -3))))
 953
 954 (with-test (:name :handler-case-bogus-compiler-note
 955             :skipped-on '(not (and :stack-allocatable-fixed-objects
 956                                    :stack-allocatable-closures)))
 957   (handler-bind
 958       ((compiler-note (lambda (note)
 959                         (error "compiler issued note ~S during test" note))))
 960     ;; Taken from SWANK, used to signal a bogus stack allocation
 961     ;; failure note.
 962     (compile nil
 963              `(lambda (files fasl-dir load)
 964                 (declare (muffle-conditions style-warning))
 965                 (let ((needs-recompile nil))
 966                   (dolist (src files)
 967                     (let ((dest (binary-pathname src fasl-dir)))
 968                       (handler-case
 969                           (progn
 970                             (when (or needs-recompile
 971                                       (not (probe-file dest))
 972                                       (file-newer-p src dest))
 973                               (setq needs-recompile t)
 974                               (ensure-directories-exist dest)
 975                               (compile-file src :output-file dest :print nil :verbose t))
 976                             (when load
 977                               (load dest :verbose t)))
 978                         (serious-condition (c)
 979                           (handle-loadtime-error c dest))))))))))
 980
 981 (declaim (inline foovector barvector))
 982 (defun foovector (x y z)
 983   (let ((v (make-array 3)))
 984     (setf (aref v 0) x
 985           (aref v 1) y
 986           (aref v 2) z)
 987     v))
 988 (defun barvector (x y z)
 989   (make-array 3 :initial-contents (list x y z)))
 990 (with-test (:name :dx-compiler-notes
 991             :skipped-on '(not (and :stack-allocatable-vectors
 992                                    :stack-allocatable-closures)))
 993   (flet ((assert-notes (j lambda)
 994            (let ((n 0))
 995              (handler-bind ((compiler-note (lambda (c)
 996                                              (declare (ignore c))
 997                                              (incf n))))
 998                (let ((*error-output* (make-broadcast-stream)))
 999                  (compile nil lambda))
1000                (unless (= j n)
1001                  (error "Wanted ~S notes, got ~S for~%   ~S"
1002                         j n lambda))))))
1003     ;; These ones should complain.
1004     (assert-notes 1 `(lambda (x)
1005                        (let ((v (make-array x)))
1006                          (declare (dynamic-extent v))
1007                          (length v))))
1008     (assert-notes 2 `(lambda (x)
1009                        (let ((y (if (plusp x)
1010                                     (true x)
1011                                     (true (- x)))))
1012                          (declare (dynamic-extent y))
1013                          (print y)
1014                          nil)))
1015     (assert-notes 1 `(lambda (x)
1016                        (let ((y (foovector x x x)))
1017                          (declare (sb-int:truly-dynamic-extent y))
1018                          (print y)
1019                          nil)))
1020     ;; These ones should not complain.
1021     (assert-notes 0 `(lambda (name)
1022                        (with-alien
1023                            ((posix-getenv (function c-string c-string)
1024                                           :EXTERN "getenv"))
1025                          (values
1026                           (alien-funcall posix-getenv name)))))
1027     (assert-notes 0 `(lambda (x)
1028                        (let ((y (barvector x x x)))
1029                          (declare (dynamic-extent y))
1030                          (print y)
1031                          nil)))
1032     (assert-notes 0 `(lambda (list)
1033                        (declare (optimize (space 0)))
1034                        (sort list (lambda (x y) ; shut unrelated notes up
1035                                     (< (truly-the fixnum x)
1036                                        (truly-the fixnum y))))))
1037     (assert-notes 0 `(lambda (other)
1038                        #'(lambda (s c n)
1039                            (ignore-errors (funcall other s c n)))))))
1040
1041 ;;; Stack allocating a value cell in HANDLER-CASE would blow up stack
1042 ;;; in an unfortunate loop.
1043 (defun handler-case-eating-stack ()
1044   (declare (muffle-conditions warning)) ; "dead code detected ... IR1-PHASES"
1045   (let ((sp nil))
1046     (do ((n 0 (logand most-positive-fixnum (1+ n))))
1047         ((>= n 1024))
1048      (multiple-value-bind (value error) (ignore-errors)
1049        (when (and value error) nil))
1050       (if sp
1051           (assert (= sp (sb-c::%primitive sb-c:current-stack-pointer)))
1052           (setf sp (sb-c::%primitive sb-c:current-stack-pointer))))))
1053 (with-test (:name :handler-case-eating-stack
1054             :skipped-on '(not (and :stack-allocatable-fixed-objects
1055                                    :stack-allocatable-closures)))
1056   (assert-no-consing (handler-case-eating-stack)))
1057
1058 ;;; A nasty bug where RECHECK-DYNAMIC-EXTENT-LVARS thought something was going
1059 ;;; to be stack allocated when it was not, leading to a bogus %NIP-VALUES.
1060 ;;; Fixed by making RECHECK-DYNAMIC-EXTENT-LVARS deal properly with nested DX.
1061 (deftype vec ()
1062   `(simple-array t (3)))
1063 (declaim (ftype (function (t t t) vec) vec))
1064 (declaim (inline vec))
1065 (defun vec (a b c)
1066   (make-array 3 :initial-contents (list a b c)))
1067 (defun bad-boy (vec)
1068   (declare (type vec vec))
1069   (lambda (fun)
1070     (let ((vec (vec (aref vec 0) (aref vec 1) (aref vec 2))))
1071       (declare (dynamic-extent vec))
1072       (funcall fun vec))))
1073 (with-test (:name :recheck-nested-dx-bug
1074             :skipped-on '(not :stack-allocatable-vectors))
1075   (assert (funcall (bad-boy (vec 1.0 2.0 3.3))
1076                    (lambda (vec) (equalp vec (vec 1.0 2.0 3.3)))))
1077   (flet ((foo (x) (declare (ignore x))))
1078     (let ((bad-boy (bad-boy (vec 2.0 3.0 4.0))))
1079       (assert-no-consing (funcall bad-boy #'foo)))))
1080
1081 (with-test (:name :bug-497321)
1082   (flet ((test (lambda type)
1083            (let ((n 0))
1084              (handler-bind ((condition (lambda (c)
1085                                          (incf n)
1086                                          (unless (typep c type)
1087                                            (error "wanted ~S for~%  ~S~%got ~S"
1088                                                   type lambda (type-of c))))))
1089                (let ((*error-output* (make-broadcast-stream)))
1090                  (compile nil lambda)))
1091              (assert (= n 1)))))
1092     (test `(lambda () (declare (dynamic-extent #'bar)))
1093           'style-warning)
1094     (test `(lambda () (declare (dynamic-extent bar)))
1095           'style-warning)
1096     (test `(lambda (bar) (cons bar (lambda () (declare (dynamic-extent bar)))))
1097           'sb-ext:compiler-note)
1098     (test `(lambda ()
1099              (flet ((bar () t))
1100                (cons #'bar (lambda () (declare (dynamic-extent #'bar))))))
1101           'sb-ext:compiler-note)))
1102
1103 (with-test (:name :bug-586105
1104             :skipped-on '(not (and :stack-allocatable-vectors
1105                                :stack-allocatable-lists)))
1106   (flet ((test (x)
1107            (let ((vec1 (make-array 1 :initial-contents (list (list x))))
1108                  (vec2 (make-array 1 :initial-contents `((,x))))
1109                  (vec3 (make-array 1 :initial-contents `#((,x))))
1110                  (vec4 (make-array 1 :initial-contents `(#(,x)))))
1111              (declare (dynamic-extent vec1 vec2 vec3 vec4))
1112              (assert (eql x (car (aref vec1 0))))
1113              (assert (eql x (car (aref vec2 0))))
1114              (assert (eql x (car (aref vec3 0))))
1115              (assert (eql x (elt (aref vec4 0) 0))))))
1116     (assert-no-consing (test 42))))
1117 \f
1118 (defun bug-681092 ()
1119   (declare (optimize speed))
1120   (let ((c 0))
1121     (flet ((bar () c))
1122       (declare (dynamic-extent #'bar))
1123       (do () ((list) (bar))
1124         (setf c 10)
1125         (return (bar))))))
1126 (with-test (:name :bug-681092)
1127   (assert (= 10 (bug-681092))))
1128 \f
1129 ;;;; Including a loop in the flow graph between a DX-allocation and
1130 ;;;; the start of its environment would, for a while, cause executing
1131 ;;;; any of the code in the loop to discard the value.  Found via
1132 ;;;; attempting to DX-allocate an array, which triggered the FILL
1133 ;;;; transform, which inserted such a loop.
1134 (defun bug-1472785 (x)
1135   (let ((y (let ((z (cons nil nil)))
1136              (let ((i 0))
1137                (tagbody
1138                 b1
1139                   (when (= x i) (go b2))
1140                   (incf i)
1141                   (go b1)
1142                 b2))
1143              z))
1144         (w (cons t t)))
1145     (declare (dynamic-extent y w))
1146     (eq y w)))
1147 (with-test (:name :bug-1472785)
1148   (assert (null (bug-1472785 1))))
1149 \f
1150 ;;;; &REST lists should stop DX propagation -- not required by ANSI,
1151 ;;;; but required by sanity.
1152
1153 (declaim (inline rest-stops-dx))
1154 (defun-with-dx rest-stops-dx (&rest args)
1155   (declare (dynamic-extent args))
1156   (apply #'opaque-identity args))
1157
1158 (defun-with-dx rest-stops-dx-ok ()
1159   (equal '(:foo) (rest-stops-dx (list :foo))))
1160
1161 (with-test (:name :rest-stops-dynamic-extent)
1162   (assert (rest-stops-dx-ok)))
1163
1164 ;;;; These tests aren't strictly speaking DX, but rather &REST -> &MORE
1165 ;;;; conversion.
1166 (with-test (:name :rest-to-more-conversion)
1167   (let ((f1 (compile nil `(lambda (f &rest args)
1168                             (apply f args)))))
1169     (assert-no-consing (assert (eql f1 (funcall f1 #'identity f1)))))
1170   (let ((f2 (compile nil `(lambda (f1 f2 &rest args)
1171                             (values (apply f1 args) (apply f2 args))))))
1172     (assert-no-consing (multiple-value-bind (a b)
1173                            (funcall f2 (lambda (x y z) (+ x y z)) (lambda (x y z) (- x y z))
1174                                     1 2 3)
1175                          (assert (and (eql 6 a) (eql -4 b))))))
1176   (let ((f3 (compile nil `(lambda (f &optional x &rest args)
1177                             (when x
1178                               (apply f x args))))))
1179     (assert-no-consing (assert (eql 42 (funcall f3
1180                                                 (lambda (a b c) (+ a b c))
1181                                                 11
1182                                                 10
1183                                                 21)))))
1184   (let ((f4
1185           (let ((*error-output* (make-broadcast-stream)))
1186             (compile nil `(lambda (f &optional x &rest args
1187                                      &key y &allow-other-keys)
1188                             (apply f y x args))))))
1189     (assert-no-consing (funcall f4 (lambda (y x yk y2 b c)
1190                                      (assert (eq y 'y))
1191                                      (assert (= x 2))
1192                                      (assert (eq :y yk))
1193                                      (assert (eq y2 'y))
1194                                      (assert (eq b 'b))
1195                                      (assert (eq c 'c)))
1196                                 2 :y 'y 'b 'c)))
1197   (let ((f5 (compile nil `(lambda (a b c &rest args)
1198                             (apply #'list* a b c args)))))
1199     (assert (equal '(1 2 3 4 5 6 7) (funcall f5 1 2 3 4 5 6 '(7)))))
1200   (let ((f6 (compile nil `(lambda (x y)
1201                             (declare (optimize speed))
1202                             (concatenate 'string x y)))))
1203     (assert (equal "foobar" (funcall f6 "foo" "bar"))))
1204   (let ((f7 (compile nil `(lambda (&rest args)
1205                             (lambda (f)
1206                               (apply f args))))))
1207     (assert (equal '(a b c d e f) (funcall (funcall f7 'a 'b 'c 'd 'e 'f) 'list))))
1208   (let ((f8 (compile nil `(lambda (&rest args)
1209                             (flet ((foo (f)
1210                                      (apply f args)))
1211                               #'foo)))))
1212     (assert (equal '(a b c d e f) (funcall (funcall f8 'a 'b 'c 'd 'e 'f) 'list))))
1213   (let ((f9 (compile nil `(lambda (f &rest args)
1214                             (flet ((foo (g)
1215                                      (apply g args)))
1216                               (declare (dynamic-extent #'foo))
1217                               (funcall f #'foo))))))
1218     (assert (equal '(a b c d e f)
1219                    (funcall f9 (lambda (f) (funcall f 'list)) 'a 'b 'c 'd 'e 'f))))
1220   (let ((f10 (compile nil `(lambda (f &rest args)
1221                             (flet ((foo (g)
1222                                      (apply g args)))
1223                               (funcall f #'foo))))))
1224     (assert (equal '(a b c d e f)
1225                    (funcall f10 (lambda (f) (funcall f 'list)) 'a 'b 'c 'd 'e 'f))))
1226   (let ((f11 (compile nil `(lambda (x y z)
1227                              (block out
1228                                (labels ((foo (x &rest rest)
1229                                           (apply (lambda (&rest rest2)
1230                                                    (return-from out (values-list rest2)))
1231                                                  x rest)))
1232                                 (if x
1233                                     (foo x y z)
1234                                     (foo y z x))))))))
1235     (multiple-value-bind (a b c) (funcall f11 1 2 3)
1236       (assert (eql a 1))
1237       (assert (eql b 2))
1238       (assert (eql c 3)))))
1239
1240 (defun opaque-funcall (function &rest arguments)
1241   (apply function arguments))
1242
1243 (with-test (:name :implicit-value-cells)
1244   (flet ((test-it (type input output)
1245            (let ((f (compile nil `(lambda (x)
1246                                     (declare (type ,type x))
1247                                     (flet ((inc ()
1248                                              (incf x)))
1249                                       (declare (dynamic-extent #'inc))
1250                                       (list (opaque-funcall #'inc) x))))))
1251              (assert (equal (funcall f input)
1252                             (list output output))))))
1253     (let ((width sb-vm:n-word-bits))
1254       (test-it t (1- most-positive-fixnum) most-positive-fixnum)
1255       (test-it `(unsigned-byte ,(1- width)) (ash 1 (- width 2)) (1+ (ash 1 (- width 2))))
1256       (test-it `(signed-byte ,width) (ash -1 (- width 2)) (1+ (ash -1 (- width 2))))
1257       (test-it `(unsigned-byte ,width) (ash 1 (1- width)) (1+ (ash 1 (1- width))))
1258       (test-it 'single-float 3f0 4f0)
1259       (test-it 'double-float 3d0 4d0)
1260       (test-it '(complex single-float) #c(3f0 4f0) #c(4f0 4f0))
1261       (test-it '(complex double-float) #c(3d0 4d0) #c(4d0 4d0)))))
1262
1263 (with-test (:name :sap-implicit-value-cells)
1264   (let ((f (compile nil `(lambda (x)
1265                            (declare (type system-area-pointer x))
1266                            (flet ((inc ()
1267                                     (setf x (sb-sys:sap+ x 16))))
1268                              (declare (dynamic-extent #'inc))
1269                              (list (opaque-funcall #'inc) x)))))
1270         (width sb-vm:n-machine-word-bits))
1271     (assert (every (lambda (x)
1272                      (sb-sys:sap= x (sb-sys:int-sap (+ 16 (ash 1 (1- width))))))
1273                    (funcall f (sb-sys:int-sap (ash 1 (1- width))))))))
1274
1275 (with-test (:name :&more-bounds)
1276   ;; lp#1154946
1277   (assert (not (funcall (compile nil '(lambda (&rest args) (car args))))))
1278   (assert (not (funcall (compile nil '(lambda (&rest args) (nth 6 args))))))
1279   (assert (not (funcall (compile nil '(lambda (&rest args) (elt args 10))))))
1280   (assert (not (funcall (compile nil '(lambda (&rest args) (cadr args))))))
1281   (assert (not (funcall (compile nil '(lambda (&rest args) (third args)))))))