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

[Shengchen Kan via llvm-commits]

KanRobert wrote:

> This is a follow up of #96878 to support hoisting load/store for diamond CFG.
> 
> ```
> void test (int a, int *c, int *d) {
>   if (a)
>    *c = a;
>   else
>    *d = a;
> }
> ```

Need to update the description, it does not require diamond CFG.

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