From 559f3379e852f304a0255afcc37714b9d0da59d9 Mon Sep 17 00:00:00 2001
From: Eddie Hung <eddie@fpgeh.com>
Date: Fri, 3 Jan 2020 14:37:58 -0800
Subject: Preserve topo ordering from -prep_holes to write_xaiger

---
 passes/techmap/abc9_ops.cc | 1 +
 1 file changed, 1 insertion(+)

(limited to 'passes/techmap/abc9_ops.cc')

diff --git a/passes/techmap/abc9_ops.cc b/passes/techmap/abc9_ops.cc
index c671553e2..bcf622dba 100644
--- a/passes/techmap/abc9_ops.cc
+++ b/passes/techmap/abc9_ops.cc
@@ -322,6 +322,7 @@ void prep_holes(RTLIL::Module *module)
 			}
 		}
 
+		cell->attributes["\\abc9_box_order"] = box_list.size();
 		box_list.emplace_back(cell);
 	}
 	log_assert(!box_list.empty());
-- 
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