Function rustc_monomorphize::collector::should_codegen_locally

pub(crate) fn should_codegen_locally<'tcx>(
    tcx: TyCtxt<'tcx>,
    instance: Instance<'tcx>
) -> bool

Returns true if we should codegen an instance in the local crate, or returns false if we can just link to the upstream crate and therefore don’t need a mono item.