https://gcc.gnu.org/bugzilla/show_bug.cgi?id=49148
Andrew Pinski <pinskia at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Resolution|--- |INVALID Status|UNCONFIRMED |RESOLVED --- Comment #8 from Andrew Pinski <pinskia at gcc dot gnu.org> --- (In reply to John Peyton from comment #7) > > Try -ffast-math (the default for ICC) which disables subnormals. > > Thanks, this helped it run much faster! Yes so you confirm this is a subnormal issue. > > Could this also be related to subnormal numbers, or is this just a different > issue? Different issue related to /4.0 can be done as *0.25 but I think that might be solved in newer versions of GCC; I didn't try.