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; Part of Scheme 48 1.9. See file COPYING for notices and license.
; Authors: Richard Kelsey
; Identifying values called by primops
; Is NODE the value being called by a primop?
(define (procedure-node? node)
(let ((parent (node-parent node)))
(and (node? parent)
(let ((primop (call-primop parent)))
(and (primop-procedure? primop)
(eq? (primop-call-index primop)
(node-index node)))))))
; Get the node called at CALL.
(define (called-procedure-node call)
(cond ((and (primop-procedure? (call-primop call))
(primop-call-index (call-primop call)))
=> (lambda (i)
(call-arg call i)))
(else '#f)))
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