https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108481
--- Comment #4 from Li Shaohua <shaohua.li at inf dot ethz.ch> ---
(In reply to Andrew Pinski from comment #2)
> i = i - 6822162149299574294;
>
> Is not being invoked on the executable code.
>
> If we look at look at the original code:
>
>
> if ((i * (unsigned long)7 <= 1) << j)
> ;
> else {
> i = i - 6822162149299574294;
> if (j) {
> if (*g)
> break;
> continue;
> }
> return 8;
> }
> ...
> return h;
>
> The only path where the undefined behavior even matters is inside the path
> that had continue in it. Which is where the subtraction is pushed to now.
>
> I don't know if we should declear this as a valid thing to do or not.
When I compiled the source code with `-O1 -fsanitize=undefined` and then used
gdb to check the execution trace of the binary, I indeed observed that `i = i -
6822162149299574294` was executed.
