[PATCH] D65303: [BPI] Adjust the probability for floating point unordered comparison

[Guozhi Wei via Phabricator via llvm-commits]

Carrot added a comment.

isnan() is lowered to fcmp uno, in this case the taken probability may be higher, but still much smaller than ordered result, and the usage of isnan() is already very rare, most of uno comparisons are generated from different math library functions.
On the other side I guess most of the taken uno comparisons in a correct program comes from explicitly isnan() call.


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  https://reviews.llvm.org/D65303/new/

https://reviews.llvm.org/D65303