[Bug tree-optimization/86010] [7/8/9 Regression] redundant memset with smaller size not eliminated

[law at redhat dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86010

--- Comment #9 from Jeffrey A. Law <law at redhat dot com> ---
We don't merge the two memset calls in the second example.  It's of arguable
value IMHO.