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

[msebor at gcc dot gnu.org]

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

--- Comment #8 from Martin Sebor <msebor at gcc dot gnu.org> ---
I believe the fix is behind the regression reported in pr87011.