[llvm-branch-commits] [llvm] DAG: Lower fcNormal is.fpclass to compare with inf (PR #100389)

[Jay Foad via llvm-branch-commits]

jayfoad wrote:

> Looks worse for x86 without the fabs check. Not sure if this is useful for any targets.

Seems unlikely that this would ever be profitable in the ordered case, since you can implement that with pretty simple integer checks on the exponent field. (Check that it isn't 0 and isn't maximal.)

https://github.com/llvm/llvm-project/pull/100389