[compiler-rt] [llvm] [TypeProf][InstrFDO]Implement more efficient comparison sequence for indirect-call-promotion with vtable profiles. (PR #81442)

[David Li via llvm-commits]

david-xl wrote:

Can we rely on instcombine to do the sinking?

(the patch summary has a small error -- the comparison instruction in the example should be %cond = icmp eq ptr %vtable, @vtable-address-point

https://github.com/llvm/llvm-project/pull/81442