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

[via llvm-commits]

gulfemsavrun wrote:

I confirm that this fixed the issue that I reported in [134fcc6](https://github.com/llvm/llvm-project/commit/134fcc62786d31ab73439201dce2d73808d1785a).



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