Serialization: include global variables in the worklist-processing #39203
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This is similar to the existing -emit-sib, except that not everything is serialized, but only functions which are marked as "serializable".
It's not sufficient to first serialize all functions and then serialize all globals, because a function can be referenced from the initializer expression of a global. Therefore the worklist processing must include both, functions and globals. This fixes a crash in the serializer, which is exposed through cross-module-optimization. https://bugs.swift.org/browse/SR-15162 rdar://82827256
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It's not sufficient to first serialize all functions and then serialize all globals, because a function can be referenced from the initializer expression of a global.
Therefore the worklist processing must include both, functions and globals.
This fixes a crash in the serializer, which is exposed through cross-module-optimization.
https://bugs.swift.org/browse/SR-15162
rdar://82827256