[llvm] [LoopVectorize] Add support for vectorisation of simple early exit loops (PR #88385)

[David Sherwood via llvm-commits]

david-arm wrote:

> I was wondering if it would be good to add some AArch64 codegen tests too so that we can look at some codegen?

If you're referring to the codegen coming out of clang after vectorising the loop, I don't think we typically have tests like that in test/Transform/LoopVectorize. They are normally IR/opt based tests. Are you referring specifically to the codegen from the cttz.elts intrinsic? If so, we already have tests for them - see CodeGen/AArch64/intrinsic-cttz-elts-sve.ll.

https://github.com/llvm/llvm-project/pull/88385