From 72ce06909e87d1697ed5eac62d91db00a751a34b Mon Sep 17 00:00:00 2001
From: Eddie Hung <eddie@fpgeh.com>
Date: Fri, 20 Sep 2019 17:48:37 -0700
Subject: [PATCH] Trim mismatched connection to be same (smallest) size

---
 passes/techmap/techmap.cc | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/passes/techmap/techmap.cc b/passes/techmap/techmap.cc
index 3cc3edbcb..1d0362ad6 100644
--- a/passes/techmap/techmap.cc
+++ b/passes/techmap/techmap.cc
@@ -359,6 +359,12 @@ struct TechmapWorker
 				for (auto &attr : w->attributes) {
 					if (attr.first == ID(src))
 						continue;
+					auto lhs = GetSize(extra_connect.first);
+					auto rhs = GetSize(extra_connect.second);
+					if (lhs > rhs)
+						extra_connect.first.remove(rhs, lhs-rhs);
+					else if (rhs > lhs)
+						extra_connect.second.remove(lhs, rhs-lhs);
 					module->connect(extra_connect);
 					break;
 				}