[Bug middle-end/126153] [13/14/15/16/17 Regression] [csmith] runtime crash with -O3 -ftrivial-auto-var-init=zero

[dcb314 at hotmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=126153

--- Comment #11 from David Binderman <dcb314 at hotmail dot com> ---
(In reply to Sam James from comment #10)
> i think the reduction has UB. You can try again with some
> -Werror=uniniitalised -Werror=aggressive-loop-optimizations and such added,
> or I can have a go in a few days.

Good idea. Second reduction in progress. It's going a lot faster than the
first.