[PATCH] D146170: InstCombine: Fold is.fpclass for single infinity to fcmp

[Jay Foad via Phabricator via llvm-commits]

foad added a comment.

>From the description:

> llvm.is.fpclass(x, fcPosInf) -> fcmp oeq x, +inf
> llvm.is.fpclass(x, fcNegInf) -> fcmp oeq x, -inf
> llvm.is.fpclass(x, ~fcPosInf) -> fcmp one x, +inf
> llvm.is.fpclass(x, ~fcNegInf) -> fcmp one x, -inf

The last two should be "une".


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  https://reviews.llvm.org/D146170/new/

https://reviews.llvm.org/D146170