Basic support for tracking smi-only arrays on ia32.

src/runtime.h

 // Copyright 2011 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 312 matching lines @@
   F(StoreContextSlot, 4, 1) \
   \
   /* Declarations and initialization */ \
   F(DeclareGlobals, 3, 1) \
   F(DeclareContextSlot, 4, 1) \
   F(InitializeVarGlobal, -1 /* 2 or 3 */, 1) \
   F(InitializeConstGlobal, 2, 1) \
   F(InitializeConstContextSlot, 3, 1) \
   F(OptimizeObjectForAddingMultipleProperties, 2, 1) \
   \
+  /* Arrays */ \
+  F(NonSmiElementStored, 1, 1) \
   /* Debugging */ \
   F(DebugPrint, 1, 1) \
   F(DebugTrace, 0, 1) \
   F(TraceEnter, 0, 1) \
   F(TraceExit, 1, 1) \
   F(Abort, 2, 1) \
   /* Logging */ \
   F(Log, 2, 1) \
   /* ES5 */ \
   F(LocalKeys, 1, 1) \
   /* Cache suport */ \
   F(GetFromCache, 2, 1) \
   \
   /* Message objects */ \
   F(NewMessageObject, 2, 1) \
   F(MessageGetType, 1, 1) \
   F(MessageGetArguments, 1, 1) \
   F(MessageGetStartPosition, 1, 1) \
   F(MessageGetScript, 1, 1) \
   \
   /* Pseudo functions - handled as macros by parser */ \
   F(IS_VAR, 1, 1) \
   \
   /* expose boolean functions from objects-inl.h */ \
+  F(HasFastSmiOnlyElements, 1, 1) \
   F(HasFastElements, 1, 1) \
   F(HasFastDoubleElements, 1, 1) \
   F(HasDictionaryElements, 1, 1) \
   F(HasExternalPixelElements, 1, 1) \
   F(HasExternalArrayElements, 1, 1) \
   F(HasExternalByteElements, 1, 1) \
   F(HasExternalUnsignedByteElements, 1, 1) \
   F(HasExternalShortElements, 1, 1) \
   F(HasExternalUnsignedShortElements, 1, 1) \
   F(HasExternalIntElements, 1, 1) \
@@ skipping 308 matching lines @@
 
 enum kDeclareGlobalsFlags {
   kDeclareGlobalsEvalFlag = 1 << 0,
   kDeclareGlobalsStrictModeFlag = 1 << 1,
   kDeclareGlobalsNativeFlag = 1 << 2
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_RUNTIME_H_