Use optimized code map to cache OSR code.

src/hydrogen-instructions.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 6000 matching lines @@
   }
 
   static HObjectAccess ForFirstCodeSlot() {
     return HObjectAccess(kInobject, SharedFunctionInfo::kFirstCodeSlot);
   }
 
   static HObjectAccess ForFirstContextSlot() {
     return HObjectAccess(kInobject, SharedFunctionInfo::kFirstContextSlot);
   }
 
+  static HObjectAccess ForFirstOsrAstIdSlot() {
+    return HObjectAccess(kInobject,
+                         SharedFunctionInfo::kFirstOsrAstIdSlot,
+                         Representation::Smi());
+  }
+
   static HObjectAccess ForOptimizedCodeMap() {
     return HObjectAccess(kInobject,
                          SharedFunctionInfo::kOptimizedCodeMapOffset);
   }
 
   static HObjectAccess ForFunctionContextPointer() {
     return HObjectAccess(kInobject, JSFunction::kContextOffset);
   }
 
   static HObjectAccess ForMap() {
@@ skipping 1455 matching lines @@
   virtual bool IsDeletable() const V8_OVERRIDE { return true; }
 };
 
 
 #undef DECLARE_INSTRUCTION
 #undef DECLARE_CONCRETE_INSTRUCTION
 
 } }  // namespace v8::internal
 
 #endif  // V8_HYDROGEN_INSTRUCTIONS_H_