[Bug tree-optimization/117482] [12/13/14/15 Regression] Bogus -Wstringop-overflow warning in intrusive list implementation

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=117482

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
      Known to work|                            |11.4.0
      Known to fail|                            |12.1.0
             Status|UNCONFIRMED                 |NEW
   Target Milestone|---                         |12.5
   Last reconfirmed|                            |2024-11-07
            Summary|Bogus -Wstringop-overflow   |[12/13/14/15 Regression]
                   |warning in intrusive list   |Bogus -Wstringop-overflow
                   |implementation              |warning in intrusive list
                   |                            |implementation
     Ever confirmed|0                           |1

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
I was thinking there was a missed optimization due to an character type but int
gives the same IR too.

Anyways confirmed.

Note another workaround is to add:
   if (!entry) __builtin_unreachable();

After the pop. To say the pop will always work.