[llvm] [LLVM][CodeGen][X86] Add ConstantInt/FP based vector support to MachineInstr fixup and printing code. (PR #137331)

[Phoebe Wang via llvm-commits]

phoebewang wrote:

> > do you have actual test check changes for this please?
> 
> I don't understand what you mean. I've added RUN lines to show the output now remains unchanged when the new code paths are enabled.

We usually test what modified by the change rather than silence test cases. Only NFC change don't need to test.

https://github.com/llvm/llvm-project/pull/137331