[clang] [llvm] [ThinLTO] Support dead RTTI data elimination under -fno-split-lto-unit (PR #126336)

[Mingming Liu via llvm-commits]

https://github.com/mingmingl-llvm commented:

Thanks for the work! Do you have some stats with this change applied? 

https://github.com/llvm/llvm-project/pull/126336