[Bug ipa/120098] [16 regression] g++.dg/lto/devirt-23 FAILs since r16-372-g064cac730f88dc

[hubicka at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120098

--- Comment #11 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
I think what we need here is ability to search for vtables associated with a
given anonymous namespace type and mark it as live when any of them are used
(instead of taking just the default vtable).  Is there a way to look them up?
We will see them as a symbol, so we only need to be able to walk back to a
given type.