https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92903
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-12-10
Ever confirmed|0 |1
--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
So currently this optimization is only done at the RTL level so most likely in
combine which means only use var are used still.
