[Bug c++/84824] DCE fails to remove dead code of std::function constructor

[glisse at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84824

--- Comment #4 from Marc Glisse <glisse at gcc dot gnu.org> ---
Probably related to PR59948, PR81000, etc. (I didn't look closely)