[Bug rtl-optimization/49148] Certain expressions take an extremely long time for no apparent reason

[pinskia at gcc dot gnu.org]

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.