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Modified the parallel combination code to treat cells as equivalently parallel if the same pins are no-connects. These were previously not treated as parallel because each no-connect has a unique node number, and cells were only considered as parallel if all pins connected to the same node numbers. This avoids issues with long-running symmetry breaking on standard cell designs due to cells like antenna taps or any cell that is placed without connecting it up. To do: This makes indistinguishable certain cases, e.g., N cells in circuit 1 with pin X open vs. N cells in circuit 2 with pin X all tied together. This could be caught during property matching.
2021-03-01 22:33:55 +01:00
1.5.169