The-OpenROAD-Project / The-OpenROAD-Project/OpenSTA

EquivCells is reporting FFs and Latches are the same

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#411 1 comment 0 reactions 1 assignee View on GitHub

@dsengupta0628 is already working on this.

Since Sep 10, 2026.

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Description

openroad-ff-latch-equiv.tar.gz

sta::equiv_cells returns true for an edge-triggered flip-flop and a
level-sensitive latch whose ports and output function happen to match. The
resizer then treats the latch as a legal substitute and swaps flip-flops for
latches during repair_design, silently changing the design's sequential
behavior and destroying timing.

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