[Bug target/123950] [14/15/16 Regression] wrong code at -O3 with mixed vector arithmetics and memcopy

[zsojka at seznam dot cz]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=123950

--- Comment #3 from Zdenek Sojka <zsojka at seznam dot cz> ---
On the gcc-14 branch, this is failing also at -O2.