Create optimized versions of the Map/Set clear method

src/hydrogen-instructions.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_HYDROGEN_INSTRUCTIONS_H_
 #define V8_HYDROGEN_INSTRUCTIONS_H_
 
 #include <iosfwd>
 
 #include "src/v8.h"
@@ skipping 6350 matching lines @@
   }
 
   template <typename CollectionType>
   static HObjectAccess ForOrderedHashTableNumberOfDeletedElements() {
     return HObjectAccess(kInobject,
                          CollectionType::kNumberOfDeletedElementsOffset,
                          Representation::Smi());
   }
 
   template <typename CollectionType>
+  static HObjectAccess ForOrderedHashTableNextTable() {
+    return HObjectAccess(kInobject, CollectionType::kNextTableOffset);
+  }
+
+  template <typename CollectionType>
   static HObjectAccess ForOrderedHashTableBucket(int bucket) {
     return HObjectAccess(kInobject, CollectionType::kHashTableStartOffset +
                                         (bucket * kPointerSize),
                          Representation::Smi());
   }
 
   // Access into the data table of an OrderedHashTable with a
   // known-at-compile-time bucket count.
   template <typename CollectionType, int kBucketCount>
   static HObjectAccess ForOrderedHashTableDataTableIndex(int index) {
@@ skipping 1642 matching lines @@
 };
 
 
 
 #undef DECLARE_INSTRUCTION
 #undef DECLARE_CONCRETE_INSTRUCTION
 
 } }  // namespace v8::internal
 
 #endif  // V8_HYDROGEN_INSTRUCTIONS_H_