[llvm] [MachineLICM] Correctly Apply Register Masks (PR #95746)

[Pierre van Houtryve via llvm-commits]

Pierre-vh wrote:

@mstorsjo Did you verify that reverting this, and only this commit fixes it?

Can you please create a lit test case that shows how codegen goes wrong? I don't have access to a AArch64 machine. I would like to first see what the issue is before deciding whether to revert or not.
If you have a lit test, I can then create a fix and commit the test at the same time.

https://github.com/llvm/llvm-project/pull/95746