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

[Tom Weaver via llvm-commits]

TomWeaver18 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

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