| Index: runtime/vm/flow_graph.cc | 
| diff --git a/runtime/vm/flow_graph.cc b/runtime/vm/flow_graph.cc | 
| index 71c6c31ad2f070f2584d6c781551e7281c022cbb..23edb15bf1bfba2da0c1457c65ef197b6f383cd9 100644 | 
| --- a/runtime/vm/flow_graph.cc | 
| +++ b/runtime/vm/flow_graph.cc | 
| @@ -494,9 +494,7 @@ void FlowGraph::Rename(GrowableArray<PhiInstr*>* live_phis) { | 
| } | 
|  | 
| // Name global constants. | 
| -  ConstantInstr* constant_null = new ConstantInstr(Object::ZoneHandle()); | 
| -  constant_null->set_ssa_temp_index(alloc_ssa_temp_index()); | 
| -  graph_entry_->set_constant_null(constant_null); | 
| +  graph_entry_->constant_null()->set_ssa_temp_index(alloc_ssa_temp_index()); | 
|  | 
| // Initialize start environment. | 
| GrowableArray<Definition*> start_env(variable_count()); | 
|  |