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

[Florian Hahn via llvm-commits]

https://github.com/fhahn commented:

That should be fine, assuming the cost model returns reasonable costs for them. Would be good to check if we have tests for their cost (possibly just as cost-model tests)

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