[llvm] [AArch64] Expand scmp/ucmp vector operations with sub (PR #108830)

[David Green via llvm-commits]

davemgreen wrote:

Thanks. It looks like this didn't effect clang-19 in the example I found it in, and the codegen is now better than it was before it started recognizing the ucmp/scmp.

https://github.com/llvm/llvm-project/pull/108830