https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70678
--- Comment #2 from Lukas Martini <lutoma at ohai dot su> --- Hi, thanks for testing. I have to admit the explanation regarding how the various switches play together went a little over my head, but if you tell me that's intended behaviour, I'll trust your word on it :) Just to be sure: For me, this also happens when "-fno-strict-aliasing -fwrapv" are not added as parameters, I only added those because I saw them mentioned somewhere in the bug reporting guidelines. If it's still intended behaviour without them, feel free to close this bug report and thanks for the help! Cheers, Lukas