Added infrastructure for optimizing new CanvasArray types in WebGL...

src/heap.h

 // Copyright 2006-2008 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 93 matching lines @@
   V(Map, undetectable_short_string_map, UndetectableShortStringMap)            \
   V(Map, undetectable_medium_string_map, UndetectableMediumStringMap)          \
   V(Map, undetectable_long_string_map, UndetectableLongStringMap)              \
   V(Map, undetectable_short_ascii_string_map, UndetectableShortAsciiStringMap) \
   V(Map,                                                                       \
     undetectable_medium_ascii_string_map,                                      \
     UndetectableMediumAsciiStringMap)                                          \
   V(Map, undetectable_long_ascii_string_map, UndetectableLongAsciiStringMap)   \
   V(Map, byte_array_map, ByteArrayMap)                                         \
   V(Map, pixel_array_map, PixelArrayMap)                                       \
+  V(Map, external_byte_array_map, ExternalByteArrayMap)                        \
+  V(Map, external_unsigned_byte_array_map, ExternalUnsignedByteArrayMap)       \
+  V(Map, external_short_array_map, ExternalShortArrayMap)                      \
+  V(Map, external_unsigned_short_array_map, ExternalUnsignedShortArrayMap)     \
+  V(Map, external_int_array_map, ExternalIntArrayMap)                          \
+  V(Map, external_unsigned_int_array_map, ExternalUnsignedIntArrayMap)         \
+  V(Map, external_float_array_map, ExternalFloatArrayMap)                      \
   V(Map, context_map, ContextMap)                                              \
   V(Map, catch_context_map, CatchContextMap)                                   \
   V(Map, code_map, CodeMap)                                                    \
   V(Map, oddball_map, OddballMap)                                              \
   V(Map, global_property_cell_map, GlobalPropertyCellMap)                      \
   V(Map, boilerplate_function_map, BoilerplateFunctionMap)                     \
   V(Map, shared_function_info_map, SharedFunctionInfoMap)                      \
   V(Map, proxy_map, ProxyMap)                                                  \
   V(Map, one_pointer_filler_map, OnePointerFillerMap)                          \
   V(Map, two_pointer_filler_map, TwoPointerFillerMap)                          \
@@ skipping 321 matching lines @@
   static Object* AllocateByteArray(int length);
 
   // Allocate a pixel array of the specified length
   // Returns Failure::RetryAfterGC(requested_bytes, space) if the allocation
   // failed.
   // Please note this does not perform a garbage collection.
   static Object* AllocatePixelArray(int length,
                                     uint8_t* external_pointer,
                                     PretenureFlag pretenure);
 
+  // Allocates an external array of the specified length and type.
+  // Returns Failure::RetryAfterGC(requested_bytes, space) if the allocation
+  // failed.
+  // Please note this does not perform a garbage collection.
+  static Object* AllocateExternalArray(int length,
+                                       ExternalArrayType array_type,
+                                       void* external_pointer,
+                                       PretenureFlag pretenure);
+
   // Allocate a tenured JS global property cell.
   // Returns Failure::RetryAfterGC(requested_bytes, space) if the allocation
   // failed.
   // Please note this does not perform a garbage collection.
   static Object* AllocateJSGlobalPropertyCell(Object* value);
 
   // Allocates a fixed array initialized with undefined values
   // Returns Failure::RetryAfterGC(requested_bytes, space) if the allocation
   // failed.
   // Please note this does not perform a garbage collection.
@@ skipping 412 matching lines @@
     SYMBOL_LIST(SYMBOL_INDEX_DECLARATION)
 #undef SYMBOL_DECLARATION
 
     kSymbolTableRootIndex,
     kStrongRootListLength = kSymbolTableRootIndex,
     kRootListLength
   };
 
   static Object* NumberToString(Object* number);
 
+  static Map* MapForExternalArrayType(ExternalArrayType array_type);
+  static RootListIndex RootIndexForExternalArrayType(
+      ExternalArrayType array_type);
+
  private:
   static int semispace_size_;
   static int initial_semispace_size_;
   static int young_generation_size_;
   static int old_generation_size_;
   static size_t code_range_size_;
 
   // For keeping track of how much data has survived
   // scavenge since last new space expansion.
   static int survived_since_last_expansion_;
@@ skipping 695 matching lines @@
   }
   static TranscendentalCache* caches_[kNumberOfCaches];
   Element elements_[kCacheSize];
   Type type_;
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_HEAP_H_