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Renumber before contifying to eliminate stale conts

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* module/language/cps2/contification.scm (contify): Renumber before contifying.
This commit is contained in:
Andy Wingo 2015-06-05 17:10:29 +02:00
parent 6f4487f268
commit f41823538a
1 changed files with 7 additions and 2 deletions
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7
module/language/cps2/contification.scm
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@ -466,5 +466,10 @@ function set."
conts))) conts)))
(define (contify conts) (define (contify conts)
;; FIXME: Renumbering isn't really needed but dead continuations may
;; cause compute-singly-referenced-labels to spuriously mark some
;; conts as irreducible. For now we punt and renumber so that there
;; are only live conts.
(let ((conts (renumber conts)))
(let-values (((call-substs return-substs) (compute-contification conts))) (let-values (((call-substs return-substs) (compute-contification conts)))
(apply-contification conts call-substs return-substs))) (apply-contification conts call-substs return-substs))))