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

[Shengchen Kan via llvm-commits]

KanRobert wrote:

> @KanRobert I think this patch is far away from being ready for review. Please make sure that this patch doesn't cause crashes or miscompilation on the following benchmarks:
> 
> * [ ]  Clang stage2 build
> * [ ]  SPEC 2006/2017
> * [ ]  llvm-test-suite
> * [ ]  https://github.com/dtcxzyw/llvm-opt-benchmark
> * [ ]  fuzzers (e.g., csmith)

Not familiar with other benchmarks. But I will validate SPEC2017 + llvm-test-suite on intel SDE with this PR, and comment the result on the page.

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