[PATCH] D137811: InstCombine: Perform basic isnan combines on llvm.is.fpclass

[Eli Friedman via Phabricator via llvm-commits]

efriedma added a comment.

> inlining may require conversion to a form that uses constrained intrinsics

Functions which are not strictfp are allowed to introduce "spurious" fp flag writes; for example, we can flatten control flow that contains floating-point ops.  Inlining the function doesn't change that general rule.  The inliner converts fp operations just to ensure that later optimizations don't move those operations around.


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  https://reviews.llvm.org/D137811/new/

https://reviews.llvm.org/D137811