mem: only import attributes from ports if the memory doesn't have them yet

Author: nakengelhardt

kernel/mem.cc

@@ -149,7 +149,8 @@ void Mem::emit() {
 				wr_port_xlat.push_back(i);
 		for (auto &port : rd_ports) {
 			for (auto attr: port.attributes)
-				cell->attributes.insert(attr);
+				if (!cell->has_attribute(attr.first))
+					cell->attributes.insert(attr);
 			if (port.cell) {
 				module->remove(port.cell);
 				port.cell = nullptr;
@@ -213,7 +214,8 @@ void Mem::emit() {
 		cell->setPort(ID::RD_DATA, rd_data);
 		for (auto &port : wr_ports) {
 			for (auto attr: port.attributes)
-				cell->attributes.insert(attr);
+				if (!cell->has_attribute(attr.first))
+					cell->attributes.insert(attr);
 			if (port.cell) {
 				module->remove(port.cell);
 				port.cell = nullptr;
@@ -251,7 +253,8 @@ void Mem::emit() {
 		cell->setPort(ID::WR_DATA, wr_data);
 		for (auto &init : inits) {
 			for (auto attr: init.attributes)
-				cell->attributes.insert(attr);
+				if (!cell->has_attribute(attr.first))
+					cell->attributes.insert(attr);
 			if (init.cell) {
 				module->remove(init.cell);
 				init.cell = nullptr;