[llvm] [AArch64][SME] Introduce CHECK_MATCHING_VL pseudo for streaming transitions (PR #157510)

[Benjamin Maxwell via llvm-commits]

https://github.com/MacDue commented:

I think this is looking very nice :+1: I think your tests are failing as some other codegen has changed since you generated the checks. Rebasing and regenerating the checks should solve it. 

https://github.com/llvm/llvm-project/pull/157510