(inst or header alloc-tn other-pointer-lowtag)
(inst add ndescr rank (+ (* (1+ array-dimensions-offset) n-word-bytes)
lowtag-mask))
- (inst andn ndescr 4)
+ (inst andn ndescr lowtag-mask)
(inst add alloc-tn ndescr)
(inst add ndescr rank (fixnumize (1- array-dimensions-offset)))
(inst sll ndescr ndescr n-widetag-bits)