Function sort_histogram 

pub fn sort_histogram<T: Numeric, C: Numeric>(
    samples: &Array<T>,
    histogram: &mut SharedMemory<C>,
    source: &mut SharedMemory<T>,
    destination: &mut SharedMemory<T>,
    valid: usize,
    bins: usize,
    threads: usize,
    items: usize,
    accumulate: bool,
)

Sort-based histogram without atomic counter requirements. Shared sort scratch holds the entire tile. Samples are valid integral bin indices.