[llvm] [SLP]Initial support for non-power-of-2 (but still whole register) number of elements in operands. (PR #107273)

[Philip Reames via llvm-commits]

preames wrote:

Can you explain how this version of the patch differs (profitability heuristic wise) from the previous?

My style comment from the previous review applies here as well.

https://github.com/llvm/llvm-project/pull/107273