[llvm] [X86][SimplifyCFG] Support hoisting load/store with conditional faulting (PR #96878)

[via llvm-commits]

goldsteinn wrote:

> @KanRobert As there are some potential miscompilations/crashes caused by other passes after SimplifyCFGPass, should we limit this optimization to only run in the late pipeline via `SimplifyCFGOptions`?

That would also help with the issue that masked load/store intrinsics are not well supported as traditional load/stores throughout the middle end.

https://github.com/llvm/llvm-project/pull/96878