- (let ((unboxed-elements-p (and (sc-is type immediate)
- (/= (tn-value type)
- simple-vector-widetag))))
- (inst lea result (make-ea :byte :base words :disp
- (+ (1- (ash 1 n-lowtag-bits))
- (* vector-data-offset n-word-bytes))))
- (inst and result (lognot lowtag-mask))
- ;; FIXME: It would be good to check for stack overflow here.
- (move ecx words)
- (inst shr ecx n-fixnum-tag-bits)
- (allocation result result node t)
- (unless unboxed-elements-p
- (inst cld))
- (inst lea res
- (make-ea :byte :base result :disp (* vector-data-offset n-word-bytes)))
- (inst lea result (make-ea :byte :base result :disp other-pointer-lowtag))
- (sc-case type
- (immediate
- (aver (typep (tn-value type) '(unsigned-byte 8)))
- (storeb (tn-value type) result 0 other-pointer-lowtag))
- (t
- (storew type result 0 other-pointer-lowtag)))
- (storew length result vector-length-slot other-pointer-lowtag)
- (unless unboxed-elements-p
- (inst xor zero zero)
- (inst rep)
- (inst stos zero)))))
-
-(in-package "SB!C")
-
-(defoptimizer (allocate-vector stack-allocate-result)
- ((type length words) node)
- (ecase (policy node stack-allocate-vector)
- (0 nil)
- ((1 2)
- ;; a vector object should fit in one page
- (values-subtypep (lvar-derived-type words)
- (load-time-value
- (specifier-type `(integer 0 ,(- (/ sb!vm::*backend-page-size*
- sb!vm:n-word-bytes)
- sb!vm:vector-data-offset))))))
- (3 t)))
-
-(defoptimizer (allocate-vector ltn-annotate) ((type length words) call ltn-policy)
- (let ((args (basic-combination-args call))
- (template (template-or-lose (if (awhen (node-lvar call)
- (lvar-dynamic-extent it))
- 'sb!vm::allocate-vector-on-stack
- 'sb!vm::allocate-vector-on-heap))))
- (dolist (arg args)
- (setf (lvar-info arg)
- (make-ir2-lvar (primitive-type (lvar-type arg)))))
- (unless (is-ok-template-use template call (ltn-policy-safe-p ltn-policy))
- (ltn-default-call call)
- (return-from allocate-vector-ltn-annotate-optimizer (values)))
- (setf (basic-combination-info call) template)
- (setf (node-tail-p call) nil)
-
- (dolist (arg args)
- (annotate-1-value-lvar arg))))
+ (inst lea result (make-ea :byte :base words :disp
+ (+ (1- (ash 1 n-lowtag-bits))
+ (* vector-data-offset n-word-bytes))))
+ (inst and result (lognot lowtag-mask))
+ ;; FIXME: It would be good to check for stack overflow here.
+ (move ecx words)
+ (inst shr ecx n-fixnum-tag-bits)
+ (allocation result result node t other-pointer-lowtag)
+ (inst cld)
+ (inst lea res
+ (make-ea :byte :base result :disp (- (* vector-data-offset n-word-bytes)
+ other-pointer-lowtag)))
+ (sc-case type
+ (immediate
+ (aver (typep (tn-value type) '(unsigned-byte 8)))
+ (storeb (tn-value type) result 0 other-pointer-lowtag))
+ (t
+ (storew type result 0 other-pointer-lowtag)))
+ (storew length result vector-length-slot other-pointer-lowtag)
+ (inst xor zero zero)
+ (inst rep)
+ (inst stos zero)))