Ok, thanks. Jonathan Wakely <jwakely....@gmail.com>于2020年5月22日 周五14:21写道：
> On Fri, 22 May 2020 at 06:54, Haoxin Tu via Gcc <gcc@gcc.gnu.org> wrote: > > > > Hi, there! > > > > I am new for using GCC mail list, please forgive me if something is > wrong. > > You're using the wrong mailing list, see > https://gcc.gnu.org/lists.html which says this question should be on > the gcc-help list. Please send any replies there instead. > > > I have some issues about how GCC deal with the different optimizations > in a > > UB program. > > It's undefined. Anything can happen. We're not going to define the > behaviour of undefined behaviour, because it's undefined. > > https://en.wikipedia.org/wiki/Undefined_behavior > https://en.cppreference.com/w/cpp/language/ub >
