SIL: @objc thunks should have private SIL linkage #59293
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Previously we gave them the same SIL linkage as the method, then changed the LLVM IR linkage to 'internal' (which is roughly equivalent to SIL 'private') in IRGen. This would crash in the SIL verifier if an @objc method was '@_alwaysEmitIntoClient'. While such a combination of attributes is silly since '@objc' methods are intrinsically part of the ABI, we should not crash in this case. The simplest fix is to just set the linkage to private at the SIL level, avoiding the IRGen hack entirely.
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slavapestov
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Jun 8, 2022
…bjc-thunk-linkage"" This reverts commit 2007d65.
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Previously we gave them the same SIL linkage as the method, then changed
the LLVM IR linkage to 'internal' (which is roughly equivalent to
SIL 'private') in IRGen.
This would crash in the SIL verifier if an @objc method was
'@_alwaysEmitIntoClient'. While such a combination of attributes is
silly since '@objc' methods are intrinsically part of the ABI, we
should not crash in this case.
The simplest fix is to just set the linkage to private at the SIL
level, avoiding the IRGen hack entirely.