https://gcc.gnu.org/bugzilla/show_bug.cgi?id=123021
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |INVALID
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
This is a correct warning. sum is only set and not used otherwise.
>Allegedly clang doesn't emit the warning.
That is because it treats `sum += i;` as an use but if you did `sum ++;` it
would not have been treated an use. GCC is more consistent here with that
respect.
See https://gcc.gnu.org/bugzilla/show_bug.cgi?id=44677#c25 for the commit
message which documents this (and will be added to the porting to guide too).
