[Bug tree-optimization/81503] [8 Regression] Wrong code at -O2

[babokin at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81503

--- Comment #6 from Dmitry Babokin <babokin at gmail dot com> ---
How can I switch off optimization phases to workaround the bug?

I have another instances of wrong code bugs, so I'd like to make sure that I
don't create duplicate reports for the same problem.