[llvm] [X86, SimplifyCFG] Support hoisting load/store with conditional faulting (Part II) (PR #108812)

[Shengchen Kan via llvm-commits]

KanRobert wrote:

> NumPHIInsts

Good knowledge! Then it seems this optimization for this case w/ CFCMOV does not have any value...
We just need to add a tuning knob for `NumPHIInsts <= ProfitableToSinkInstructionThreshold`, from my perspective.

https://github.com/llvm/llvm-project/pull/108812