[Bug middle-end/64463] Add warning: returns_nonnull attribute on a function compared against NULL

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64463

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

           What    |Removed                     |Added
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           Keywords|                            |diagnostic
           Severity|normal                      |enhancement