https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88646

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|---                         |INVALID

--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
If you want signed integer overflow to be defined and be the same between
different variables then use -fwrapv .

Under defined behavior means gcc could produce this behavior.  

If you want to detect this behavior at runtime you can use -fsantizer=undefined
option.

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