[llvm] [VectorUtils] Trivially vectorize ldexp, [l]lround (PR #145545)

[Ramkumar Ramachandra via llvm-commits]

artagnon wrote:

> I see. The hoisted vplan node is not included in the cost calculation, even though it is vectorized.

@davemgreen Thanks for the investigation: this seems to be a bug in LV. Could you kindly share a LLVM IR reproducer?

https://github.com/llvm/llvm-project/pull/145545