llvm dev - Sep 2020 - How to know if function has a body in a different module

Hello Everyone,

I am wondering if there is a way to identify if function is defined in any
other module? For example suppose file A calls a function foo and it's body
is defined in file B.
I have a llvm pass which runs on module, how can I know from call
instruction, that called function has a body in a different module.

Any help would be appreciated.

Regards,
Sangeeta
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