[turbofan] Make field indices explicit for LoadElimination.

src/compiler/load-elimination.h

 // Copyright 2016 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_COMPILER_LOAD_ELIMINATION_H_
 #define V8_COMPILER_LOAD_ELIMINATION_H_
 
 #include "src/compiler/graph-reducer.h"
 
 namespace v8 {
@@ skipping 196 matching lines @@
   Reduction ReduceStoreTypedElement(Node* node);
   Reduction ReduceEffectPhi(Node* node);
   Reduction ReduceStart(Node* node);
   Reduction ReduceOtherNode(Node* node);
 
   Reduction UpdateState(Node* node, AbstractState const* state);
 
   AbstractState const* ComputeLoopState(Node* node,
                                         AbstractState const* state) const;
 
+  static int FieldIndexOf(int offset);
   static int FieldIndexOf(FieldAccess const& access);
 
   CommonOperatorBuilder* common() const;
   AbstractState const* empty_state() const { return &empty_state_; }
   Graph* graph() const;
   JSGraph* jsgraph() const { return jsgraph_; }
   Zone* zone() const { return node_states_.zone(); }
 
   AbstractState const empty_state_;
   AbstractStateForEffectNodes node_states_;
   JSGraph* const jsgraph_;
 
   DISALLOW_COPY_AND_ASSIGN(LoadElimination);
 };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_LOAD_ELIMINATION_H_