https://gcc.gnu.org/bugzilla/show_bug.cgi?id=124434
--- Comment #3 from Brian M. Sutin <gnu at skewray dot com> --- The issue only appears on -O0: no options. It goes away with -O1, -O2, -O3. I never run denormals, only good numbers (sum converges to 2.0), INFINITY, or NAN. (I should check denorm...) The dependence on optimization is what made me think this was a gcc issue.
