[Bug middle-end/50724] isnan broken by -ffinite-math-only in g++

[marc.glisse at normalesup dot org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50724

--- Comment #10 from Marc Glisse <marc.glisse at normalesup dot org> 2011-10-14 21:12:40 UTC ---
As a library writer, having isnan return false is precisely what I am expecting
from -ffinite-math-only. In my code, I implement regular computations for
finite numbers, and I need some special cases for infinite and nan values,
which I test with isnan and isfinite. With -ffinite-math-only, the compiler is
able to remove those special cases entirely.