[llvm] [AArch64][CodeGen] Fix illegal register aliasing bug for mops instrs (PR #88869)

[Jack Styles via llvm-commits]

Stylie777 wrote:

I think there should also be some LLVM-Lit tests that check the IR CodeGen. The llvm-mc test checks any assembly which the user inputs into the compiler, but if an ACLE Intrinsic is used this can be checked differently within the tests. 

The tests can be written in a way that the output is check not to be a certain value/register. See #77770 for an example of how a test can ensure early-clobber was being respected within IR and CodeGen.



https://github.com/llvm/llvm-project/pull/88869