From e105cae4a9062dc730a442e93c6a3f7d347d1df3 Mon Sep 17 00:00:00 2001
From: George Rennie <georgerennie@gmail.com>
Date: Wed, 25 Sep 2024 16:10:16 +0100
Subject: [PATCH] opt_demorgan: add test for zero width cell

---
 tests/opt/bug4610.ys | 15 +++++++++++++++
 1 file changed, 15 insertions(+)
 create mode 100644 tests/opt/bug4610.ys

diff --git a/tests/opt/bug4610.ys b/tests/opt/bug4610.ys
new file mode 100644
index 00000000000..fc9f0ae434b
--- /dev/null
+++ b/tests/opt/bug4610.ys
@@ -0,0 +1,15 @@
+read_ilang <<EOT
+autoidx 1
+module \top
+  wire output 1 \Y
+  cell $reduce_or $reduce_or$rtl.v:29$20
+    parameter \A_SIGNED 0
+    parameter \A_WIDTH 0
+    parameter \Y_WIDTH 1
+    connect \A { }
+    connect \Y \Y
+  end
+end
+EOT
+
+equiv_opt -assert opt_demorgan