Reland 21774: Generate KeyedLoadGeneric with Hydrogen

src/heap.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 2624 matching lines @@
 
  private:
   KeyedLookupCache() {
     for (int i = 0; i < kLength; ++i) {
       keys_[i].map = NULL;
       keys_[i].name = NULL;
       field_offsets_[i] = kNotFound;
     }
   }
 
+  int ConvertToFastIndexForGeneratedCode(Map* map, int index);
+  int ConvertFromFastIndexForGeneratedCode(Map* map, int index);
+
   static inline int Hash(Map* map, Name* name);
 
   // Get the address of the keys and field_offsets arrays.  Used in
   // generated code to perform cache lookups.
   Address keys_address() {
     return reinterpret_cast<Address>(&keys_);
   }
 
   Address field_offsets_address() {
     return reinterpret_cast<Address>(&field_offsets_);
@@ skipping 433 matching lines @@
   DisallowHeapAllocation no_allocation;  // i.e. no gc allowed.
 
  private:
   DISALLOW_IMPLICIT_CONSTRUCTORS(PathTracer);
 };
 #endif  // DEBUG
 
 } }  // namespace v8::internal
 
 #endif  // V8_HEAP_H_