Convert FastNewClosureStub into hydrogen.

src/hydrogen-instructions.cc

 // 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 3843 matching lines @@
 
   if (offset == JSObject::kElementsOffset) {
     portion = kElementsPointer;
   } else if (offset == JSObject::kMapOffset) {
     portion = kMaps;
   }
   return HObjectAccess(portion, offset, representation);
 }
 
 
+HObjectAccess HObjectAccess::ForContextSlot(int index) {
+  ASSERT(index >= 0);
+  Portion portion = kInobject;
+  int offset = Context::kHeaderSize + index * kPointerSize;
+  ASSERT_EQ(offset, Context::SlotOffset(index) + kHeapObjectTag);
+  return HObjectAccess(portion, offset, Representation::Tagged());
+}
+
+
 HObjectAccess HObjectAccess::ForJSArrayOffset(int offset) {
   ASSERT(offset >= 0);
   Portion portion = kInobject;
 
   if (offset == JSObject::kElementsOffset) {
     portion = kElementsPointer;
   } else if (offset == JSArray::kLengthOffset) {
     portion = kArrayLengths;
   } else if (offset == JSObject::kMapOffset) {
     portion = kMaps;
@@ skipping 120 matching lines @@
       break;
     case kExternalMemory:
       stream->Add("[external-memory]");
       break;
   }
 
   stream->Add("@%d", offset());
 }
 
 } }  // namespace v8::internal