[Decompiler] Expressions (Part 3) (#213)

* before inserting bonus instruction

* first part of refactor for return values

* find parent method working

decompiler/ObjectFile/ObjectFileDB_IR2.cpp

@@ -239,6 +239,7 @@ void ObjectFileDB::ir2_atomic_op_pass() {
         auto ops = convert_function_to_atomic_ops(func, data.linked_data.labels);
         func.ir2.atomic_ops = std::make_shared<FunctionAtomicOps>(std::move(ops));
         func.ir2.atomic_ops_succeeded = true;
+        func.ir2.env.set_end_var(func.ir2.atomic_ops->end_op().return_var());
         successful++;
       } catch (std::exception& e) {
         lg::warn("Function {} from {} could not be converted to atomic ops: {}",