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Chez Scheme: tweak segment test for double-pair copying

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This commit is contained in:
Matthew Flatt 2020-09-06 09:49:04 -06:00
parent b66d46b4f8
commit 78fedb3b24
1 changed files with 5 additions and 7 deletions
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8
racket/src/ChezScheme/s/mkgc.ss
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@ -611,13 +611,11 @@
(cond
[(&& (!= cdr_p _)
(&& (== (TYPEBITS cdr_p) type_pair)
(&& (!= (set! qsi (MaybeSegInfo (ptr_get_segment cdr_p))) NULL)
(&& (== qsi si)
(&& (= (ptr_get_segment cdr_p) (ptr_get_segment _))
(&& (!= (FWDMARKER cdr_p) forward_marker)
;; Checking `marked_mask`, in
;; case the pair is locked
(! (-> qsi marked_mask)))))))
(check_triggers qsi)
;; case the cdr pair is locked
(! (-> si marked_mask))))))
(size size-pair 2)
(define new_cdr_p : ptr (cast ptr (+ (cast uptr _copy_) size_pair)))
(set! (pair-car _copy_) (pair-car _))