[Bug tree-optimization/78182] Missed optimizations: "fused" byte stores

[rureclonic at thraml dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78182

--- Comment #3 from Rurec Lonic <rureclonic at thraml dot com> ---
Fantastic. Thanks for this, and next time I'll make sure to pull the very
latest revision!.