[Bug ipa/125547] Missed devirtualisation through std::function

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=125547

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
     Ever confirmed|0                           |1
   Last reconfirmed|                            |2026-06-02
             Status|UNCONFIRMED                 |NEW
           Severity|normal                      |enhancement
           Keywords|                            |missed-optimization

--- Comment #2 from Drea Pinski <pinskia at gcc dot gnu.org> ---
Confirmed.

Note LLVM code generation is not exactly optimized either.
There is a call to plus_op followed by a vector add followed by a scalar add,
followed by a call to _M_manager in the inner most loop.