[llvm] [AArch64] Run optimizeTerminators earlier too. (PR #170907)

[Hassnaa Hamdi via llvm-commits]

https://github.com/hassnaaHamdi commented:

What about cases like this:
```
mov w10, wzr
mul x8, x0, x2
stp x8, x9, [x4]
cbz w10, .LBB2_2
```
Will it be supported in near future ? I think it’s very similar to the case you are handling, right?

https://github.com/llvm/llvm-project/pull/170907