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abc9: break conflict between boxes and outputs

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This commit is contained in:
Lofty 2022-05-10 19:12:39 +01:00
parent c862b1dbfb
commit c96e19bd43
2 changed files with 34 additions and 1 deletions
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6
backends/aiger/xaiger.cc
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@ -432,8 +432,12 @@ struct XAigerWriter
// that has been padded to its full width
if (bit == State::Sx)
continue;
// A bit might be simultaneously a box output
// and a primary output. The latter wins.
if (input_bits.count(bit))
continue;
if (aig_map.count(bit))
log_error("Visited AIG node more than once; this could be a combinatorial loop that has not been broken\n");
log_error("While visiting box outputs, found a signal bit more than once; this could be a combinatorial loop that has not been broken\n");
aig_map[bit] = 2*aig_m;
}