Use a reserved stack local variable to store the Code object so that it can be looked up easily whe…

vm/code_generator_ia32.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_CODE_GENERATOR_IA32_H_
 #define VM_CODE_GENERATOR_IA32_H_
 
 #ifndef VM_CODE_GENERATOR_H_
 #error Do not include code_generator_ia32.h directly; use code_generator.h.
 #endif
 
 #include "vm/assembler.h"
+#include "vm/assembler_macros.h"
 #include "vm/ast.h"
 #include "vm/growable_array.h"
 #include "vm/parser.h"
 
 namespace dart {
 
 // Forward declarations.
 class Assembler;
 class AstNode;
 class CodeGenerator;
@@ skipping 89 matching lines @@
   virtual bool IsOptimizing() const {
     return false;
   }
 
   void GenerateReturnEpilog(ReturnNode* node);
 
   // Return true if the VM may optimize functions.
   static bool CanOptimize();
 
  private:
+  static const int kLocalsOffsetFromFP = (-1 * kWordSize);
+
   // TODO(srdjan): Remove the friendship once the two compilers are properly
   // structured.
   friend class OptimizingCodeGenerator;
 
   // Return true if intrinsification succeeded and no more code is needed.
   // Returns false if either no intrinsification occured or if intrinsified
   // code needs the rest for slow case execution.
   bool TryIntrinsify();
 
   void IntrinsifyGetter();
@@ skipping 127 matching lines @@
   // The runtime context level is only incremented when a new context is
   // allocated and chained to the list of contexts.
   intptr_t context_level_;
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(CodeGenerator);
 };
 
 }  // namespace dart
 
 #endif  // VM_CODE_GENERATOR_IA32_H_