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gh-143414: Implement unique reference tracking for JIT, optimize unpacking of such tuples#144300

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@reidenongreidenong commentedJan 28, 2026•
edited by bedevere-appbot
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  1. Implements unique reference tracking to references in the JIT Optimizer.
  2. Uses the unique reference tracking to eliminate unnecessary reference counting for uniquely referenced tuples. ex:
x,y,z=f()

Some notes:

  • Only implements the unique reference tracking (and relevant optimization) for tuples in_BUILD_TUPLE, to be extended to other objects in the future
  • Objects are deemed as not uniquely referenced when they are made aliases or duplicated, in uops of_LOAD_FAST_* and_COPY.

Would appreciate any feedback.
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reidenong commentedJan 28, 2026•
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Discussed with@Fidget-Spinner, will reopen the PR after implementingPyStackRef_CLOSE_SPECIALIZED for_UNPACK_SEQUENCE_UNIQUE_TUPLE

@reidenongreidenong marked this pull request as draftJanuary 28, 2026 18:38
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@markshannonmarkshannonAwaiting requested review from markshannonmarkshannon is a code owner

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