[llvm] [AArch64][GlobalISel] Expand abs.v4i8 to v4i16 and abs.v2s16 to v2s32 (PR #81231)

[Dhruv Chawla via llvm-commits]

dc03-work wrote:

@DavidSpickett Seems like the new contributor congratulations text appears multiple times: it also appeared for me on #82740: [link](https://github.com/llvm/llvm-project/pull/82740#issuecomment-1966241537)

https://github.com/llvm/llvm-project/pull/81231