+
+(defun-with-dx dxcaller-align-1 (x &rest rest)
+ (declare (dynamic-extent rest))
+ (+ x (callee rest)))
+(assert (= (dxcaller-align-1 17 1 2 3 4 5 6 7) 39))
+(assert (= (dxcaller-align-1 17 1 2 3 4 5 6 7 8) 40))
+
+;;; %NIP-VALUES
+(defun-with-dx test-nip-values ()
+ (flet ((bar (x &rest y)
+ (declare (dynamic-extent y))
+ (if (> x 0)
+ (values x (length y))
+ (values (car y)))))
+ (multiple-value-call #'values
+ (bar 1 2 3 4 5 6)
+ (bar -1 'a 'b))))
+
+(assert (equal (multiple-value-list (test-nip-values)) '(1 5 a)))
+
+;;; LET-variable substitution
+(defun-with-dx test-let-var-subst1 (x)
+ (let ((y (list x (1- x))))
+ (opaque-identity :foo)
+ (let ((z (the list y)))
+ (declare (dynamic-extent z))
+ (length z))))
+(assert (eql (test-let-var-subst1 17) 2))
+
+(defun-with-dx test-let-var-subst2 (x)
+ (let ((y (list x (1- x))))
+ (declare (dynamic-extent y))
+ (opaque-identity :foo)
+ (let ((z (the list y)))
+ (length z))))
+(assert (eql (test-let-var-subst2 17) 2))
+
+;;; DX propagation through LET-return.
+(defun-with-dx test-lvar-subst (x)
+ (let ((y (list x (1- x))))
+ (declare (dynamic-extent y))
+ (second (let ((z (the list y)))
+ (opaque-identity :foo)
+ z))))
+(assert (eql (test-lvar-subst 11) 10))
+
+;;; this code is incorrect, but the compiler should not fail
+(defun-with-dx test-let-var-subst-incorrect (x)
+ (let ((y (list x (1- x))))
+ (opaque-identity :foo)
+ (let ((z (the list y)))
+ (declare (dynamic-extent z))
+ (opaque-identity :bar)
+ z)))
+\f
+;;; alignment
+(defvar *x*)
+(defun-with-dx test-alignment-dx-list (form)
+ (multiple-value-prog1 (eval form)
+ (let ((l (list 1 2 3 4)))
+ (declare (dynamic-extent l))
+ (setq *x* (copy-list l)))))
+(dotimes (n 64)
+ (let* ((res (loop for i below n collect i))
+ (form `(values ,@res)))
+ (assert (equal (multiple-value-list (test-alignment-dx-list form)) res))
+ (assert (equal *x* '(1 2 3 4)))))
+
+;;; closure
+
+(declaim (notinline true))
+(defun true (x)
+ (declare (ignore x))
+ t)
+
+(defun-with-dx dxclosure (x)
+ (flet ((f (y)
+ (+ y x)))
+ (declare (dynamic-extent #'f))
+ (true #'f)))
+
+(assert (eq t (dxclosure 13)))
+
+;;; value-cells
+
+(defun-with-dx dx-value-cell (x)
+ ;; Not implemented everywhere, yet.
+ #+(or x86 x86-64 mips)
+ (let ((cell x))
+ (declare (dynamic-extent cell))
+ (flet ((f ()
+ (incf cell)))
+ (declare (dynamic-extent #'f))
+ (true #'f))))
+
+;;; CONS
+
+(defun-with-dx cons-on-stack (x)
+ (let ((cons (cons x x)))
+ (declare (dynamic-extent cons))
+ (true cons)
+ nil))
+
+;;; Nested DX
+
+(defun-with-dx nested-dx-lists ()
+ (let ((dx (list (list 1 2) (list 3 4))))
+ (declare (dynamic-extent dx))
+ (true dx)
+ nil))
+
+(defun-with-dx nested-dx-conses ()
+ (let ((dx (cons 1 (cons 2 (cons 3 (cons (cons t t) nil))))))
+ (declare (dynamic-extent dx))
+ (true dx)
+ nil))
+
+(defun-with-dx nested-dx-not-used (x)
+ (declare (list x))
+ (let ((l (setf (car x) (list x x x))))
+ (declare (dynamic-extent l))
+ (true l)
+ (true (length l))
+ nil))
+
+(defun-with-dx nested-evil-dx-used (x)
+ (declare (list x))
+ (let ((l (list x x x)))
+ (declare (dynamic-extent l))
+ (unwind-protect
+ (progn
+ (setf (car x) l)
+ (true l))
+ (setf (car x) nil))
+ nil))
+
+;;; multiple uses for dx lvar
+
+(defun-with-dx multiple-dx-uses ()
+ (let ((dx (if (true t)
+ (list 1 2 3)
+ (list 2 3 4))))
+ (declare (dynamic-extent dx))
+ (true dx)
+ nil))
+
+;;; with-spinlock should use DX and not cons
+
+(defvar *slock* (sb-thread::make-spinlock :name "slocklock"))
+
+(defun test-spinlock ()
+ (sb-thread::with-spinlock (*slock*)
+ (true *slock*)))
+
+;;; not really DX, but GETHASH and (SETF GETHASH) should not cons
+
+(defvar *table* (make-hash-table))
+
+(defun test-hash-table ()
+ (setf (gethash 5 *table*) 13)
+ (gethash 5 *table*))
+\f
+(defmacro assert-no-consing (form &optional times)
+ `(%assert-no-consing (lambda () ,form) ,times))
+(defun %assert-no-consing (thunk &optional times)
+ (let ((before (get-bytes-consed))
+ (times (or times 10000)))
+ (declare (type (integer 1 *) times))
+ (dotimes (i times)
+ (funcall thunk))
+ (assert (< (- (get-bytes-consed) before) times))))
+
+(defmacro assert-consing (form &optional times)
+ `(%assert-consing (lambda () ,form) ,times))
+(defun %assert-consing (thunk &optional times)
+ (let ((before (get-bytes-consed))
+ (times (or times 10000)))
+ (declare (type (integer 1 *) times))
+ (dotimes (i times)
+ (funcall thunk))
+ (assert (not (< (- (get-bytes-consed) before) times)))))
+
+(defvar *a-cons* (cons nil nil))
+
+#+(or x86 x86-64 alpha ppc sparc mips)
+(progn
+ (assert-no-consing (dxclosure 42))
+ (assert-no-consing (dxlength 1 2 3))
+ (assert-no-consing (dxlength t t t t t t))
+ (assert-no-consing (dxlength))
+ (assert-no-consing (dxcaller 1 2 3 4 5 6 7))
+ (assert-no-consing (test-nip-values))
+ (assert-no-consing (test-let-var-subst1 17))
+ (assert-no-consing (test-let-var-subst2 17))
+ (assert-no-consing (test-lvar-subst 11))
+ (assert-no-consing (dx-value-cell 13))
+ (assert-no-consing (cons-on-stack 42))
+ (assert-no-consing (nested-dx-conses))
+ (assert-no-consing (nested-dx-lists))
+ (assert-consing (nested-dx-not-used *a-cons*))
+ (assert-no-consing (nested-evil-dx-used *a-cons*))
+ (assert-no-consing (multiple-dx-uses))
+ ;; Not strictly DX..
+ (assert-no-consing (test-hash-table))
+ #+sb-thread
+ (assert-no-consing (test-spinlock)))
+
+\f
+;;; Bugs found by Paul F. Dietz
+(assert
+ (eq
+ (funcall
+ (compile
+ nil
+ '(lambda (a b)
+ (declare (optimize (speed 2) (space 0) (safety 0)
+ (debug 1) (compilation-speed 3)))
+ (let* ((v5 (cons b b)))
+ (declare (dynamic-extent v5))
+ a)))
+ 'x 'y)
+ 'x))
+
+\f
+;;; other bugs
+
+;;; bug reported by Svein Ove Aas
+(defun svein-2005-ii-07 (x y)
+ (declare (optimize (speed 3) (space 2) (safety 0) (debug 0)))
+ (let ((args (list* y 1 2 x)))
+ (declare (dynamic-extent args))
+ (apply #'aref args)))
+(assert (eql
+ (svein-2005-ii-07
+ '(0)
+ #3A(((1 1 1) (1 1 1) (1 1 1))
+ ((1 1 1) (1 1 1) (4 1 1))
+ ((1 1 1) (1 1 1) (1 1 1))))
+ 4))
+
+;;; bug reported by Brian Downing: stack-allocated arrays were not
+;;; filled with zeroes.
+(defun-with-dx bdowning-2005-iv-16 ()
+ (let ((a (make-array 11 :initial-element 0)))
+ (declare (dynamic-extent a))
+ (assert (every (lambda (x) (eql x 0)) a))))
+(bdowning-2005-iv-16)
+