Function planner_prefill_uses_host_backend

src/models/ace_step/planner.cpp:152–165

}

bool planner_prefill_uses_host_backend(core::BackendType backend_type) {
    switch (backend_type) {
    case core::BackendType::Vulkan:
        // Vulkan keeps the validated host-prefill path for now; it can try the Metal
        // decode-graph prompt prefill path below once parity and performance are checked.
        return true;
    case core::BackendType::Metal:
    case core::BackendType::Cpu:
    case core::BackendType::Cuda:
    case core::BackendType::Hip:
    case core::BackendType::BestAvailable:
        return false;
    }
    return false;
}

core::TensorValue reshape_planner_heads(