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

[Phoebe Wang via llvm-commits]

phoebewang wrote:

@KanRobert , with the latest change, the icount and cond_br of all cpu2017 benchmarks are shown as below:
| Patch | icount | cond_br |
|--------|--------|--------|
| Without | 5.747 | 0.769 |
| With | 5.71 | 0.797 |

Does the value seem reasonable. There's no failures in both cases.

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