[llvm] [AArch64] Fixup destructive floating-point precision conversions (PR #118788)

[via llvm-commits]

https://github.com/CarolineConcatto commented:

Thank you Spencer for your patch. 
There are some changes that are not related to the patch.
For instance formatting, maybe next time leave this for another patch that not even needs review.
There is also some refactoring, that I am not sure if it was not possible to be in another patch as well. 



https://github.com/llvm/llvm-project/pull/118788