[Bug c/78215] aggressive-loop-optimizations undefined behavior warning does not trigger

[paf at cray dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78215

--- Comment #1 from Patrick Farrell <paf at cray dot com> ---
Created attachment 39969
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=39969&action=edit
reproducer .c file

.c version of the reproducer