[llvm] [CodeGen] expand-fp: Change frem expansion criterion (PR #158285)

[Frederik Harwath via llvm-commits]

frederik-h wrote:

@zixu-w @SundeepKushwaha @SixWeining @mandlebug @asb @andreisfr @koachan @kaz7 @RKSimon @uweigand Ping. Do you have any concerns about the changes to the legalization actions for the targets you maintain? The changes to the other targets are similar as those approved by davemgreen and dschuff. I do not necessarily need a review of the expand-fp changes - but I am glad about any feedback, of course - as @arsenm has already reviewed this part of the PR.

https://github.com/llvm/llvm-project/pull/158285