[Bug c/102661] signed integer overflow not detected in comparison since gcc-8

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102661

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

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

--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Signed integer overflow is undefined. You need to either use -fwrapv which
defines it as wrapping or you need to use unsigned typea to do the arithmetical
operations or you need to do the overflow detection differently.