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Do not keep global just because it refers to itself

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Justin Ethier 2015-04-03 16:54:26 -04:00
parent 503770a899
commit 621463216f
1 changed files with 6 additions and 2 deletions
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8
trans.scm
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@ -1140,7 +1140,6 @@
;; Many improvements can be made, including:
;;
;; TODO: remove unused locals
;; TODO: do not keep defines that call themselves recursively
(define (filter-unused-variables asts)
(define (do-filter code)
(let ((all-fv (apply ;; More efficient way to do this?
@ -1148,7 +1147,12 @@
(map
(lambda (ast)
(if (define? ast)
(free-vars (define->exp ast))
(let ((var (define->var ast)))
;; Do not keep global that refers to itself
(filter
(lambda (v)
(not (equal? v var)))
(free-vars (define->exp ast))))
(free-vars ast)))
code))))
(filter