[Bug c++/104635] for loop optimized into infinite loop

[szullo.adam at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104635

--- Comment #8 from Szüllő Ádám <szullo.adam at gmail dot com> ---
Yes, the code as a whole is invalid.
But for(int i=0; i<4; i++) is well defined.