[Bug ipa/126241] Missed devirtualization of immutable std::function dispatch blocks

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=126241

--- Comment #8 from ptomsich at gcc dot gnu.org ---
@Kyrylo: Added the proposed series as attachement. Let me know if this works
for you.