[llvm] [LV][EVL] Generate negative strided load/store for reversed load/store (PR #123608)

[Alexey Bataev via llvm-commits]

alexey-bataev wrote:

There is another potential issue. Some targets might not support strided operations, so would be good to add a check and add new flag(possibly?) in load/stores recipes for strided ops

https://github.com/llvm/llvm-project/pull/123608