# Only sub-blocks containing max_limit number of
# cells (instances), or less, will be considered for ungrouping
set compile_auto_ungroup_delay_num_cells
set compile_auto_ungroup_area_num_cells
# Prevent parent-cells from being ungrouped while the culprit
# child cells which do not meet the num_cells limit remain grouped
set compile_auto_ungroup_count_leaf_cells true
# Ensure that sub-blocks with WLMs that are different
# than their parent cell are allowed to be ungrouped
set compile_auto_ungroup_override_wlm true
# Prevent glue logic at the top level of your current design
# or maintain the hierarchy of key blocks, e.g. for verification, pipeline designs
set_ungroup
To achieve the best synthesis results set max_limitto
‘infinite’, e.g. 99,999,999
May lose significant hierarchy in the design –
consider post-synthesis simulation and physical layout affects
Apply smaller limit if needed or control with set_ungroup false
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