[llvm] [AArch64] Combine signext_inreg of setcc(... != splat(0)) (PR #157665)

[David Sherwood via llvm-commits]

https://github.com/david-arm commented:

Thanks for this! Looks like a nice improvement. :) I had a suggestion on how to improve this by matching a pattern earlier in the pipeline.

https://github.com/llvm/llvm-project/pull/157665