Copy attributes to _TECHMAP_REPLACE_ cells

1 files changed, 8 insertions, 2 deletions

diff --git a/passes/techmap/techmap.cc b/passes/techmap/techmap.cc
index b351d3be8..e85714b57 100644
--- a/passes/techmap/techmap.cc
+++ b/passes/techmap/techmap.cc
@@ -327,8 +327,9 @@ struct TechmapWorker
 		for (auto &it : tpl->cells_)
 		{
 			std::string c_name = it.second->name.str();
+			bool techmap_replace_cell = (!flatten_mode) && (c_name == "\\_TECHMAP_REPLACE_");
 
-			if (!flatten_mode && c_name == "\\_TECHMAP_REPLACE_")
+			if (techmap_replace_cell)
 				c_name = orig_cell_name;
 			else
 				apply_prefix(cell->name.str(), c_name);
@@ -358,6 +359,11 @@ struct TechmapWorker
 
 			if (c->attributes.count("\\src"))
 				c->add_strpool_attribute("\\src", extra_src_attrs);
+
+			if (techmap_replace_cell)
+				for (auto attr : cell->attributes)
+					if (!c->attributes.count(attr.first))
+						c->attributes[attr.first] = attr.second;
 		}
 
 		for (auto &it : tpl->connections()) {
@@ -1005,7 +1011,7 @@ struct TechmapPass : public Pass {
 		log("constant value.\n");
 		log("\n");
 		log("A cell with the name _TECHMAP_REPLACE_ in the map file will inherit the name\n");
-		log("of the cell that is being replaced.\n");
+		log("and attributes of the cell that is being replaced.\n");
 		log("\n");
 		log("See 'help extract' for a pass that does the opposite thing.\n");
 		log("\n");