From: Sebastien Bourdeauducq <sb@m-labs.hk>
Date: Fri, 21 Nov 2014 22:51:05 +0000 (-0800)
Subject: fhdl/tools: do not attempt to rename sync clock domain if it does not exist
X-Git-Tag: 24jan2021_ls180~2099^2~261
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=5801e5746b637194bce6517e9bffb9c01da761c0;p=litex.git

fhdl/tools: do not attempt to rename sync clock domain if it does not exist
---

diff --git a/migen/fhdl/tools.py b/migen/fhdl/tools.py
index 6596b30c..ed74ab0e 100644
--- a/migen/fhdl/tools.py
+++ b/migen/fhdl/tools.py
@@ -233,11 +233,12 @@ def rename_clock_domain_expr(f, old, new):
 
 def rename_clock_domain(f, old, new):
 	rename_clock_domain_expr(f, old, new)
-	if new in f.sync:
-		f.sync[new].extend(f.sync[old])
-	else:
-		f.sync[new] = f.sync[old]
-	del f.sync[old]
+	if old in f.sync:
+		if new in f.sync:
+			f.sync[new].extend(f.sync[old])
+		else:
+			f.sync[new] = f.sync[old]
+		del f.sync[old]
 	for special in f.specials:
 		special.rename_clock_domain(old, new)
 	try: