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ZJIT: Remove GuardShape from known-frozen object with same shape #915

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good first issue

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on Dec 11, 2025

If we have a ~GuardShape(recv, shape)~~ LoadField(recv, offset)+GuardBitEquals(shape, expected) where we know recv is frozen and has shape shape, we can remove the LoadField and GuardBitEquals.

Edit the fold_constants pass.

tekknolagi
assigned
tobi
,
tekknolagi
and
tenderworks
and unassigned
tobi
,
tekknolagi
and
tenderworks
on Dec 11, 2025
tekknolagi
added
good first issueGood for newcomers
on Dec 11, 2025
ayaannadamalshopify
assigned
ayaannadamalshopify
,
d62liu
and
kevinyvv
on Dec 15, 2025
tekknolagi
unassigned
kevinyvv
,
d62liu
and
ayaannadamalshopify
on Jan 13, 2026
39bytes
self-assigned this
on Jan 13, 2026
tekknolagi
closed this as completedin ruby/ruby#15863 on Jan 14, 2026
pull
added a commit that references this issue on Jan 14, 2026
ZJIT: Constant-fold LoadField/GuardBitEquals from known-frozen object
65a4845

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