ValueTracking: Teach computeKnownFPClass to look at bitcast + integer max (#184073) The returned class will still be one of the bitpatterns. This pattern is used in rocm device libraries in assorted functions, e.g., https://github.com/ROCm/llvm-project/blob/amd-staging/amd/device-libs/ocml/src/rlen3F.cl#L20 I believe it is blocking the eliminationg of finite checks in some of the more complex functions.
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