[compiler-rt] [compiler-rt][nsan] Add support for nan detection (PR #101531)

[Alexander Shaposhnikov via llvm-commits]

alexander-shaposhnikov wrote:

@cseslowpoke, thanks for working on this. I've added a few comments,
I'd probably wait for a few days to let @MaskRay have a look at the patch as well.


https://github.com/llvm/llvm-project/pull/101531