https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112537
--- Comment #11 from Kito Cheng <kito at gcc dot gnu.org> --- It's not scope of auto vectorization, so I would suggest add something like `-mstringop-strategy=*` or `-mmemcpy-strategy=*` (from x86) or `-param=riscv-mops-memcpy-size-threshold=` (from aarch64). Personally I prefer x86 approach.
