[Bug c/91254] Wrong generate code with a series of array access

[alebencz at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91254

--- Comment #2 from Alexandre Bencz <alebencz at gmail dot com> ---
same problem, with -fwrapv, the program still stucked... and, for a test, I
tried to use the -fsanitize=undefined and the program still stucked...