Store pointer instead of reference to LocalVariable in ast and flow graph.

runtime/vm/flow_graph_builder.h

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #ifndef VM_FLOW_GRAPH_BUILDER_H_
 #define VM_FLOW_GRAPH_BUILDER_H_
 
 #include "vm/allocation.h"
 #include "vm/ast.h"
 #include "vm/growable_array.h"
@@ skipping 129 matching lines @@
   // which parts are reachable.  Afterward, the graph exit is the false
   // successor of the loop condition.
   void TieLoop(const TestGraphVisitor& test_fragment,
                const EffectGraphVisitor& body_fragment);
 
   // Wraps a value in a push-argument instruction and adds the result to the
   // graph.
   PushArgumentInstr* PushArgument(Value* value);
 
  protected:
-  Computation* BuildStoreLocal(const LocalVariable& local, Value* value);
-  Computation* BuildLoadLocal(const LocalVariable& local);
+  Computation* BuildStoreLocal(const LocalVariable* local, Value* value);
+  Computation* BuildLoadLocal(const LocalVariable* local);
 
   // Helpers for translating parts of the AST.
   void TranslateArgumentList(const ArgumentListNode& node,
                              ZoneGrowableArray<Value*>* values);
   void BuildPushArguments(const ArgumentListNode& node,
                           ZoneGrowableArray<PushArgumentInstr*>* values);
 
   // Creates an instantiated type argument vector used in preparation of an
   // allocation call.
   // May be called only if allocating an object of a parameterized class.
@@ skipping 48 matching lines @@
   intptr_t AllocateTempIndex() { return temp_index_++; }
   void DeallocateTempIndex(intptr_t n) {
     ASSERT(temp_index_ >= n);
     temp_index_ -= n;
   }
 
   Value* BuildObjectAllocation(ConstructorCallNode* node);
   void BuildConstructorCall(ConstructorCallNode* node,
                             PushArgumentInstr* alloc_value);
 
-  void BuildStoreContext(const LocalVariable& variable);
-  void BuildLoadContext(const LocalVariable& variable);
+  void BuildStoreContext(const LocalVariable* variable);
+  void BuildLoadContext(const LocalVariable* variable);
 
   void BuildThrowNode(ThrowNode* node);
 
   ClosureCallComp* BuildClosureCall(ClosureCallNode* node);
 
   Value* BuildNullValue();
 
  private:
   // Specify a computation as the final result.  Adds a Do instruction to
   // the graph, but normally overridden in subclasses.
@@ skipping 120 matching lines @@
   // Output parameters.
   TargetEntryInstr** true_successor_address_;
   TargetEntryInstr** false_successor_address_;
 
   intptr_t condition_token_pos_;
 };
 
 }  // namespace dart
 
 #endif  // VM_FLOW_GRAPH_BUILDER_H_