[llvm] [X86][CodeGen] Fix crash when commute operands of Instruction for code size (PR #79245)

[Shengchen Kan via llvm-commits]

KanRobert wrote:

> For 18.x are we better off reverting [134fcc6](https://github.com/llvm/llvm-project/commit/134fcc62786d31ab73439201dce2d73808d1785a) or cherry picking this patch when its completed? For safety I'm currently preferring reversion.

I think it would not be a clean revert. I prefer a cherry-pick @RKSimon 

https://github.com/llvm/llvm-project/pull/79245