From: Eddie Hung <eddie@fpgeh.com>
Date: Wed, 27 Nov 2019 21:20:12 +0000 (-0800)
Subject: Add comment, use sigmap
X-Git-Tag: working-ls180~881^2^2~118
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=449b1d2c6f3f3dffcb0bd50f4d6398ceb928b114;p=yosys.git

Add comment, use sigmap
---

diff --git a/backends/aiger/xaiger.cc b/backends/aiger/xaiger.cc
index 8b809b2e2..e05b6cc60 100644
--- a/backends/aiger/xaiger.cc
+++ b/backends/aiger/xaiger.cc
@@ -198,11 +198,11 @@ struct XAigerWriter
 			}
 		}
 
+		// Cannot fold into above due to use of sigmap
 		for (auto bit : input_bits)
 			undriven_bits.erase(sigmap(bit));
 		for (auto bit : output_bits)
-			if (!bit.wire->port_input)
-				unused_bits.erase(bit);
+			unused_bits.erase(sigmap(bit));
 
 		// TODO: Speed up toposort -- ultimately we care about
 		//       box ordering, but not individual AIG cells