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Issue #293 - Do not inline if any mutated prim args

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As a first cut, do not inline a prim call if any of its arguments has been mutated by a (set!). This is too restrictive but a decent starting point.
This commit is contained in:
Justin Ethier 2019-01-11 13:02:42 -05:00
parent 43c39abc8a
commit 02b884bf32
1 changed files with 11 additions and 7 deletions
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18
scheme/cyclone/cps-optimizations.sld
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@ -1193,16 +1193,20 @@
;
; TODO: this one is experimental, not sure if it really helps at all. still,
; there may well be cases where inlining the var being mutated will cause problems!
;(for-each
; (lambda (v)
; (with-var v (lambda (var)
; (if (adbv:cannot-inline var)
; (set! cannot-inline #t)))))
; args)
(for-each
(lambda (v)
(with-var v (lambda (var)
(if (member scope-sym (adbv:mutated-indirectly var))
(if (adbv:mutated-by-set? var)
(set! cannot-inline #t)))))
args)
(for-each
(lambda (v)
(with-var v (lambda (var)
(if (or (member scope-sym (adbv:mutated-indirectly var))
(adbv:mutated-by-set? var)) ;; TOO restrictive, only matters if set! occurs in body we
;; are inlining to. Also, does not catch cases where the
;; var might be mutated by a function call outside this
;; module (but hopefully we already catch that elsewhere).
(set! cannot-inline #t))
(if (not (adbv:inlinable var))
(set! fast-inline #f)))))