Turn RegExpConstructResultStub into a HydrogenCodeStub.

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 5975 matching lines @@
   static HObjectAccess ForJSArrayBufferViewByteOffset() {
     return HObjectAccess::ForJSObjectOffset(
         JSArrayBufferView::kByteOffsetOffset);
   }
 
   static HObjectAccess ForJSArrayBufferViewByteLength() {
     return HObjectAccess::ForJSObjectOffset(
         JSArrayBufferView::kByteLengthOffset);
   }
 
+  static HObjectAccess ForGlobalObjectNativeContext() {
+    return HObjectAccess(kInobject, GlobalObject::kNativeContextOffset);
+  }
+
   void PrintTo(StringStream* stream);
 
   inline bool Equals(HObjectAccess that) const {
     return value_ == that.value_;  // portion and offset must match
   }
 
  protected:
   void SetGVNFlags(HValue *instr, bool is_store);
 
  private:
@@ skipping 1462 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_