[llvm] [LoongArch] Add a pass to rewrite rd to r0 for non-computational instrs whose return values are unused (PR #94590)

[via llvm-commits]

heiher wrote:

> Good morning from the UK,
> 
> It looks as though this change may have introduced failures in a couple of tests:
> 
> https://lab.llvm.org/buildbot/#/builders/247/builds/19544 https://lab.llvm.org/buildbot/#/builders/109/builds/90912
> 
> FAIL: LLVM::opt-pipeline.ll FAIL: LLVM::machinelicm-address-pseudos.ll
> 
> Is anyone able to take a look?
> 
> Many thanks in advance, Tom W

Thanks for your report. That was caused by two implicitly related PRs being pulled in, and I'm working on fixing it.

https://github.com/llvm/llvm-project/pull/94590