[Bug rtl-optimization/71309] Copying fields within a struct followed by use results in load hit store

[wschmidt at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71309

--- Comment #3 from Bill Schmidt <wschmidt at gcc dot gnu.org> ---
Probably related to PR74585.  In both cases we have full stores followed by
partial loads, and DSE isn't able to figure out the store is dead as a result.