[Bug c++/93008] Need a way to make inlining heuristics ignore whether a function is inline (especially for constexpr in >= c++20)

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93008

--- Comment #18 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Jakub posted constexpr_only which is related attribute here:
https://gcc.gnu.org/pipermail/gcc-patches/2025-December/704656.html

I am not 100% sure that is the approach we want though ...