[llvm] [CVP] #114820 add 'samesign' for 'icmp' (PR #115642)

[Nikita Popov via llvm-commits]

nikic wrote:

It looks like you also need to update a clang test:
```
^[_bk;t=1731230406738^GFailed Tests (1):^M
^[_bk;t=1731230406738^G  Clang :: CodeGen/aarch64-pure-scalable-args.c^M
```

https://github.com/llvm/llvm-project/pull/115642