From 2c0448a81b83d24276c9997505dd0a036a3ba459 Mon Sep 17 00:00:00 2001
From: Robert O'Callahan <rocallahan@google.com>
Date: Wed, 21 Jan 2026 03:30:17 +0000
Subject: [PATCH] Avoid spurious copy in `IdStringCollector::trace_named()`

---
 kernel/rtlil.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/rtlil.cc b/kernel/rtlil.cc
index 0103cabfb..42d5f56b6 100644
--- a/kernel/rtlil.cc
+++ b/kernel/rtlil.cc
@@ -186,7 +186,7 @@ struct IdStringCollector {
 		trace(selection_var.selected_modules);
 		trace(selection_var.selected_members);
 	}
-	void trace_named(const RTLIL::NamedObject named) {
+	void trace_named(const RTLIL::NamedObject &named) {
 		trace_keys(named.attributes);
 		trace(named.name);
 	}