https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87857
--- Comment #5 from Stas Sergeev <stsp at users dot sourceforge.net> --- (In reply to Jakub Jelinek from comment #4) > The reason you get an error is that the expression isn't constant, because > it needs to emit the runtime diagnostics. Just fix the bug and get away > with that? 1U<<31 will do. I of course already "fixed" my code as per earlier comments here. So you can close this if you want. But I am sure gcc is not doing the right thing here. Just make it a warning, and, more importantly, -W warning, independent of any -f. Then people will get this warning with -Wall or whatever, and will not get a compilation failure with -fsanitize on otherwise warning-less code. I am not sure I understand how the run-time diagnostic makes the expression non-const.
