Allan Shortlidge 40eb1422bb IRGen/SIL: Fix IR linkage computation for inlined function references from modules imported @_weakLinked. ...

Include the parent `ModuleDecl` when serializing a `SILFunction` so that it is available on deserialized functions even though the full `DeclContext` is not present. With the parent module always available we can reliably compute whether the `SILFunction` comes from a module that was imported `@_weakLinked`.

Serialize the `DeclContext` member of `SILFunction` so that it can be used to look up the module that a function belongs to in order to compute weak import status.

Resolves rdar://98521248

2022-08-19 09:56:45 -07:00

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