[Bug tree-optimization/125916] [17 regression] Mesa maybe miscompiled with __attribute__((const))

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=125916

--- Comment #3 from Drea Pinski <pinskia at gcc dot gnu.org> ---
Yes this code is undefined. Because it is not const. 

There is request for a different attribute which fits this case but I cant find
it right now.