[llvm] [CodeGen] MachineLICM: Do not consider "loop liveins" as loop defs (PR #121769)

[Sjoerd Meijer via llvm-commits]

https://github.com/sjoerdmeijer commented:

Thanks for the patch. I could review this. I had a first quick look at the AArch64 tests that generally look good, but left one question. I will look at the source code changes later today, but a quick test question in the meantime. Did you test this? Did you e.g. do a stage2 build and run its regression tests (as a minimum)?

https://github.com/llvm/llvm-project/pull/121769