Doug Gregor 74e85c8416 [SIL] Track the parent module of a SIL global variable through serialization ...

As with SIL functions, track the parent module where a SIL global
variable was originally defined so that we can determine whether we
are outside of its original module for linkage purposes. Use this to
make sure we emit via a weak definition when emitting to a module
other than the originating module.

Fixes rdar://160153163.

2025-09-08 17:44:49 -07:00

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