[Bug other/95971] [10 regression] Optimizer converts a false boolean value into a true boolean value

[glisse at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95971

--- Comment #11 from Marc Glisse <glisse at gcc dot gnu.org> ---
        while(!a.isZero());

that doesn't look like something you would find in real code. Are you waiting
for a different thread to modify a? Then you should use an atomic operation.
Are you waiting for the hardware to change something? Use volatile. Do you
really want an infinite loop? Spell it out if(!a.isZero())for(;;);