[llvm] [LV] optimize VF for low TC, when tail-folding (PR #91253)

[Ramkumar Ramachandra via llvm-commits]

artagnon wrote:

> Sorry for the delay - I added a quick test case in [46541a3](https://github.com/llvm/llvm-project/commit/46541a363695b9014cd95267fa78592be752d64d).

I can indeed confirm that your concerns were valid, and that this test breaks (it selects VF of 1) with the patch. Have to think about this some more.

https://github.com/llvm/llvm-project/pull/91253