[Bug c++/92475] [8/9/10 Regression] incorrect code with optimization

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92475

--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> ---
You're right, sorry for not checking 9 and 10 properly. I also see it working
again after r263875.