[llvm] [VPlan] Handle VPWidenCastRecipe without underlying value in EVL transform (PR #120194)

[Florian Hahn via llvm-commits]

https://github.com/fhahn approved this pull request.

LGTM, thanks!

It looks like https://lab.llvm.org/buildbot/#/builders/132 isn't working properly? I only see a large number of old build requests, but no actual builds.

https://github.com/llvm/llvm-project/pull/120194