AIG simplifier using equivalences #1605
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Shouldn't we also use this simplifier (beyond just unit tests)? |
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Adds the aig_simplify() function that simplifies an AIG using a given vector of equivalent node pairs. The function: - Substitutes equivalent nodes (replacing larger var numbers with smaller) - Handles equivalences with constants - Computes transitive closure of equivalences - Performs constant propagation (a AND false = false, a AND true = a) - Simplifies trivial cases (a AND a = a, a AND !a = false) - Basic backward propagation from AND output to inputs Co-Authored-By: Claude Sonnet 4.5 <[email protected]>
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Summary
aig_simplify()function that simplifies an AIG given a vector of equivalent node pairsa AND false = false,a AND true = a)a AND a = a,a AND !a = false)Test plan
Unit tests added in
unit/trans-netlist/aig_simplifier.cppthat cover empty AIGs, variable-only AIGs, AND nodes, equivalent variables, negated equivalences, constant equivalences, transitive equivalences, multi-level AIGs, and constant propagation🤖 Generated with Claude Code