> The test failures with floating-point numbers apparently come from the fact > that in this compiler's runtime environment, denormalized numbers don't > exist: they are mapped to zero.
This is documented here: https://www.intel.com/content/www/us/en/docs/dpcpp-cpp-compiler/developer-guide-reference/2023-1/fp-model-fp.html, it happens from -O1. Some projects explicitly add `icx -fp-model=strict` to fix this: https://github.com/python/cpython/blob/e02ac1d907d7cf32db5592593bd0c19a88cc6131/configure.ac#L2832-L2833.
