https://github.com/arsenm approved this pull request.

I remember debugging inconsistent behavior on different platforms in treatment 
of signaling nans and denormal flushing with these queries. I think these days 
we emit them as is.fpclass anyway, and then instcombine turns them into fcmp 
when valid. This may be a backwards system, so this may need revisiting in the 
future 

https://github.com/llvm/llvm-project/pull/124145
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