Incremental Compile allows reuse of place and route data from a previous run. To
set it up, simply reference an existing placed or routed DSP before
place_design. It is possible to reuse a full design, a
hierarchy level, or a cell type like DSPs or block RAMs. Incremental Compile also
automatically handles changes made to parts of a design.
For more information, see the Vivado Design Suite User Guide: Implementation (UG904).