(num-regs aignet) returns the number of register nodes in an aignet.
Logically this is just
In the execution this is just a stobj field access.
Function:
(defun aignet$a::num-regs (aignet) (declare (xargs :guard (aignet$a::aignet-well-formedp aignet))) (let ((__function__ 'aignet$a::num-regs)) (declare (ignorable __function__)) (stype-count (reg-stype) aignet)))