[Bug tree-optimization/68329] [4.8 4.9]gcc using array index to accelerate loop running , why turn off at gcc 5.X

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68329

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
     Ever confirmed|0                           |1
             Status|UNCONFIRMED                 |NEW
           Keywords|                            |missed-optimization
   Last reconfirmed|                            |2021-08-11

--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Looks like we lost somehow between 4.9.0 and 5.1.0 the information that
"*(pTeam->index + i)" were i!=0 is undefined.  index is not the last field
either so this should be supported.