[llvm] [clang] [MemProf] Expand optimization scope to internal linakge function (PR #73236)

[via cfe-commits]

lifengxiang1025 wrote:

> Yes, you're right. As an alternative can we use the symbol table and find Bind = LOCAL to add the prefix before hashing?

If we choose this method. I think we can't deal with the situation which one symbol is not local linkage type in thin compile, but will be converted to local linkage after thin backend by thinlto's internalization

https://github.com/llvm/llvm-project/pull/73236