IRGen: Ensure that default witness thunks are emitted in the same thread as the protocol descriptor #21850
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…ead as the protocol descriptor Protocol descriptors for resilient protocols relatively-reference default witness thunks, so when using -num-threads N with N > 1, we must ensure the default witness thunk is emitted in the same LLVM module.
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Protocol descriptors for resilient protocols relatively-reference
default witness thunks, so when using -num-threads N with N > 1,
we must ensure the default witness thunk is emitted in the same
LLVM module.