Move recording of definition used from the value to the definition.

runtime/vm/flow_graph.cc

Index: runtime/vm/flow_graph.cc
diff --git a/runtime/vm/flow_graph.cc b/runtime/vm/flow_graph.cc
index 2ea98133e23d848d54c931a8b92ff3f91634b1b7..58ae9ac02edbcfdcf761ba3390f4f8eef01bbb09 100644
--- a/runtime/vm/flow_graph.cc
+++ b/runtime/vm/flow_graph.cc
@@ -233,7 +233,7 @@ static void RecordInputUses(Instruction* instr) {
         (0 == MembershipCount(use, use->definition()->input_use_list())));
     use->set_instruction(instr);
     use->set_use_index(i);
-    use->AddToInputUseList();
+    use->definition()->AddInputUse(use);
   }
 }
 
@@ -252,7 +252,7 @@ static void RecordEnvUses(Instruction* instr) {
         (0 == MembershipCount(use, use->definition()->env_use_list())));
     use->set_instruction(instr);
     use->set_use_index(use_index++);
-    use->AddToEnvUseList();
+    use->definition()->AddEnvUse(use);
   }
 }
 
@@ -297,7 +297,7 @@ static void ComputeUseListsRecursive(BlockEntryInstr* block) {
             (0 == MembershipCount(use, use->definition()->input_use_list())));
         use->set_instruction(phi);
         use->set_use_index(pred_index);
-        use->AddToInputUseList();
+        use->definition()->AddInputUse(use);
       }
     }
   }