Add initial hydrogenized NewStringAddStub.

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 5786 matching lines @@
     return HObjectAccess(kExternalMemory, 0, Representation::Tagged());
   }
 
   static HObjectAccess ForFixedArrayLength() {
     return HObjectAccess(
         kArrayLengths,
         FixedArray::kLengthOffset,
         FLAG_track_fields ? Representation::Smi() : Representation::Tagged());
   }
 
+  static HObjectAccess ForStringHashField() {
+    return HObjectAccess(kInobject,
+                         String::kHashFieldOffset,
+                         Representation::Integer32());
+  }
+
   static HObjectAccess ForStringLength() {
     STATIC_ASSERT(String::kMaxLength <= Smi::kMaxValue);
     return HObjectAccess(
         kStringLengths,
         String::kLengthOffset,
         FLAG_track_fields ? Representation::Smi() : Representation::Tagged());
   }
 
+  static HObjectAccess ForConsStringFirst() {
+    return HObjectAccess(kInobject, ConsString::kFirstOffset);
+  }
+
+  static HObjectAccess ForConsStringSecond() {
+    return HObjectAccess(kInobject, ConsString::kSecondOffset);
+  }
+
   static HObjectAccess ForPropertiesPointer() {
     return HObjectAccess(kInobject, JSObject::kPropertiesOffset);
   }
 
   static HObjectAccess ForPrototypeOrInitialMap() {
     return HObjectAccess(kInobject, JSFunction::kPrototypeOrInitialMapOffset);
   }
 
   static HObjectAccess ForSharedFunctionInfoPointer() {
     return HObjectAccess(kInobject, JSFunction::kSharedFunctionInfoOffset);
@@ skipping 27 matching lines @@
   static HObjectAccess ForMap() {
     return HObjectAccess(kMaps, JSObject::kMapOffset);
   }
 
   static HObjectAccess ForMapInstanceSize() {
     return HObjectAccess(kInobject,
                          Map::kInstanceSizeOffset,
                          Representation::Byte());
   }
 
+  static HObjectAccess ForMapInstanceType() {
+    return HObjectAccess(kInobject,
+                         Map::kInstanceTypeOffset,
+                         Representation::Byte());
+  }
+
   static HObjectAccess ForPropertyCellValue() {
     return HObjectAccess(kInobject, PropertyCell::kValueOffset);
   }
 
   static HObjectAccess ForCellValue() {
     return HObjectAccess(kInobject, Cell::kValueOffset);
   }
 
   static HObjectAccess ForAllocationMementoSite() {
     return HObjectAccess(kInobject, AllocationMemento::kAllocationSiteOffset);
@@ skipping 1372 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_