[llvm] [NFC] Add useFPRegsForHalfType(). (PR #74147)

[Krzysztof Parzyszek via llvm-commits]

kparzysz wrote:

Are you planning to have another PR with changes to targets?  It's not yet too late to get it in 18.1.0.

https://github.com/llvm/llvm-project/pull/74147