[llvm] [ExpandLargeFpConvert] Scalarize vector types. (PR #86954)

[Bevin Hansson via llvm-commits]

bevin-hansson wrote:

> What's the difficulty supporting vectors in the expansion directly? I assume it requires simple bookkeeping adjustments to handle them?

It's the same issue as in #86959. The presence of control flow makes it a bit hard to emit vector code that matches the original.

https://github.com/llvm/llvm-project/pull/86954