https://gcc.gnu.org/bugzilla/show_bug.cgi?id=47379
Eric Gallager <egallager at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |egallager at gcc dot gnu.org
--- Comment #6 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to H.J. Lu from comment #5)
> (In reply to comment #4)
> > Can you try after:
> > 2011-12-19 Richard Sandiford <rdsandif...@googlemail.com>
> >
> > PR rtl-optimization/42839
> > * fwprop.c (forward_propagate_subreg): Skip the SIGN/ZERO_EXTEND
> > optimization if the source register is already extended.
>
> GCC 4.7.0 20120131 still does it.
4.7.0 branch is closed now, could you try a branch that's still open now?
