Keep track of which maps are associated with prototype objects so we can tune the fast-case vs. has…

src/runtime.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 362 matching lines @@
   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) \
   F(HasExternalUnsignedIntElements, 1, 1) \
   F(HasExternalFloatElements, 1, 1) \
   F(HasExternalDoubleElements, 1, 1) \
+  F(HasFastProperties, 1, 1) \
   F(TransitionElementsSmiToDouble, 1, 1) \
   F(TransitionElementsDoubleToObject, 1, 1) \
   F(HaveSameMap, 2, 1) \
   /* profiler */ \
   F(ProfilerResume, 0, 1) \
   F(ProfilerPause, 0, 1)
 
 
 #ifdef ENABLE_DEBUGGER_SUPPORT
 #define RUNTIME_FUNCTION_LIST_DEBUGGER_SUPPORT(F) \
@@ skipping 311 matching lines @@
 //---------------------------------------------------------------------------
 // Constants used by interface to runtime functions.
 
 class DeclareGlobalsEvalFlag:     public BitField<bool,         0, 1> {};
 class DeclareGlobalsNativeFlag:   public BitField<bool,         1, 1> {};
 class DeclareGlobalsLanguageMode: public BitField<LanguageMode, 2, 2> {};
 
 } }  // namespace v8::internal
 
 #endif  // V8_RUNTIME_H_