[AutoDiff] Fix custom derivative thunk for Optional #74378
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The patch fixes the issue swiftlang#55882 and enables the nil coalescing operator (aka `??`) for Optional type.
empty JVPs / VJPs has the same linkage as the original function sans external flag and also inherit serialization flag. This works for all cases but not for hidden_external ones. Drop serializable flag for such case
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preset=buildbot,tools=RA,stdlib=DA |
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@swift-ci smoke test |
MaxDesiatov
approved these changes
Jun 13, 2024
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Reapply #71721 with test fix making it less fragile
The patch fixes the issue #55882 and enables the nil coalescing operator (aka ??) for Optional type.