Teresa Johnson 1487747e99 [LTO] Prevent devirtualization for symbols dynamically exported ...

Identify dynamically exported symbols (--export-dynamic[-symbol=],
--dynamic-list=, or definitions needed to preempt shared objects) and
prevent their LTO visibility from being upgraded.
This helps avoid use of whole program devirtualization when there may
be overrides in dynamic libraries.

Differential Revision: https://reviews.llvm.org/D91583

2021-01-27 15:54:13 -08:00

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