https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89967
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |ra
Status|UNCONFIRMED |NEW
Last reconfirmed| |2019-04-04
Ever confirmed|0 |1
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
There are two seperate issues which is causing the inefficient code.
One is the first set of mov should really be movi; I don't know why the
constant formation was moved out of the loop.
The second issue is the register allocation is not doing a good job for OImode,
there are some clobber rtl there which might be getting in the way; I have not
looked into or understand why the clobber rtl is needed.
