rustc_mir_transform::remove_uninit_drops

Function is_needs_drop_and_init

Source 
fn is_needs_drop_and_init<'tcx>(
    tcx: TyCtxt<'tcx>,
    param_env: ParamEnv<'tcx>,
    maybe_inits: &ChunkedBitSet<MovePathIndex>,
    move_data: &MoveData<'tcx>,
    ty: Ty<'tcx>,
    mpi: MovePathIndex,
) -> bool