[clang] [IRPGO][ValueProfile] Instrument virtual table address that could be used to do virtual table address comparision for indirect-call-promotion. (PR #66825)

[Alan Phipps via cfe-commits]

evodius96 wrote:

Just a warning that I am planning to push a significant change to enable MC/DC within the next few hours that will cause some conflicts with what you've done here. I apologize for the inconvenience!

https://github.com/llvm/llvm-project/pull/66825