[PATCH] D159084: InstCombine: Fold is.fpclass(x, fcInf) to fabs+fcmp

[Matt Arsenault via Phabricator via llvm-commits]

arsenm added a comment.

In D159084#4627826 <https://reviews.llvm.org/D159084#4627826>, @SixWeining wrote:

> If ISD::IS_FPCLASS is legal or custom on some targets, do we still need the transform?

Regardless of codegen I think this is the better canonical form. Codegen should implement the reverse transform based on target preference


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