[llvm] [LV][AArch64]: Utilise SVE ld4/st4 instructions via auto-vectorisation (PR #89018)

[David Green via llvm-commits]

davemgreen wrote:

Hi - Is there a plan for how to handle ld3? We have seen a lot of issues recently with the canonical shuffle representation for fixed-vector ld2/ld3/ld4, and I was wondering if it made sense to move away from shuffles for fixed-length too.

https://github.com/llvm/llvm-project/pull/89018