From 5893d13ea39d6f52153f025333829da8081d603a Mon Sep 17 00:00:00 2001
From: Stephen Williams <steve@icarus.com>
Date: Sun, 20 Apr 2014 08:58:38 -0700
Subject: [PATCH] Don't connect NetFF CE pin if it is not needed

When the clock enable is not generated, don't try to hook it
up then detach it. That will make a mess that needs clean up.
Instead, leave unused ce pins (Enable) unconnected.
---
 synth2.cc | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/synth2.cc b/synth2.cc
index 9ded3d897..ad3c7ddc3 100644
--- a/synth2.cc
+++ b/synth2.cc
@@ -1009,7 +1009,8 @@ bool NetProcTop::synth_sync(Design*des)
 	    connect(tmp->pin(0),    ff2->pin_Data());
 
 	    connect(clock->pin(0),  ff2->pin_Clock());
-	    connect(ce->pin(0),     ff2->pin_Enable());
+	    if (ce->is_linked())
+		  connect(ce->pin(0),     ff2->pin_Enable());
 #if 0
 	    if (ff->pin_Aset().is_linked())
 		  connect(ff->pin_Aset(), ff2->pin_Aset());