[Bug c++/91606] [9/10 regression] Optimization leads to invalid code

[m.cencora at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91606

--- Comment #6 from m.cencora at gmail dot com ---
Just a wild guess, but maybe it is related to
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90858 and there it just manifests
itself in compilation error because it is in constexpr context.