[llvm] [X86][CodeGen] Support hoisting load/store with conditional faulting (PR #96720)

[Shengchen Kan via llvm-commits]

KanRobert wrote:

> LGTM. Do we need to wait for the CFG patch?

Thanks. I don't think we need to. We always use masked.load/store for the CFG transform. The possible difference is that in which stage we emit them and in which cases it's profitable.

Also, middle-end patch can only be buildable after this lands.

https://github.com/llvm/llvm-project/pull/96720