[llvm] [AArch64][GlobalISel] Combine G_EXTRACT_VECTOR_ELT and G_BUILD_VECTOR sequences into G_SHUFFLE_VECTOR (PR #110545)

[via llvm-commits]

ValentijnvdBeek wrote:

> LGTM with some nits, thanks!

I addresses the nits. Thanks for the great feedback that you gave me, they were really helpful and I learned about LLVM from them!

https://github.com/llvm/llvm-project/pull/110545