24 lines
641 B
Scheme
24 lines
641 B
Scheme
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; Copyright (c) 1993-1999 by Richard Kelsey. See file COPYING.
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; Identifying values called by primops
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; Is NODE the value being called by a primop?
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(define (procedure-node? node)
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(let ((parent (node-parent node)))
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(and (node? parent)
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(let ((primop (call-primop parent)))
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(and (primop-procedure? primop)
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(eq? (primop-call-index primop)
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(node-index node)))))))
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; Get the node called at CALL.
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(define (called-procedure-node call)
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(cond ((and (primop-procedure? (call-primop call))
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(primop-call-index (call-primop call)))
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=> (lambda (i)
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(call-arg call i)))
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(else '#f)))
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