Add a single-element global positive and negative cache to...

src/heap.cc

 // Copyright 2009 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 633 matching lines @@
   // maps.
   KeyedLookupCache::Clear();
   ContextSlotCache::Clear();
   DescriptorLookupCache::Clear();
 
   CompilationCache::MarkCompactPrologue();
 
   Top::MarkCompactPrologue(is_compacting);
   ThreadManager::MarkCompactPrologue(is_compacting);
 
+  CompletelyClearInstanceofCache();
+
   if (is_compacting) FlushNumberStringCache();
 }
 
 
 void Heap::MarkCompactEpilogue(bool is_compacting) {
   Top::MarkCompactEpilogue(is_compacting);
   ThreadManager::MarkCompactEpilogue(is_compacting);
 }
 
 
@@ skipping 991 matching lines @@
   obj = NumberDictionary::Allocate(128);
   if (obj->IsFailure()) return false;
   set_code_stubs(NumberDictionary::cast(obj));
 
   // Allocate the non_monomorphic_cache used in stub-cache.cc. The initial size
   // is set to avoid expanding the dictionary during bootstrapping.
   obj = NumberDictionary::Allocate(64);
   if (obj->IsFailure()) return false;
   set_non_monomorphic_cache(NumberDictionary::cast(obj));
 
+  set_instanceof_cache_function(Smi::FromInt(0));
+  set_instanceof_cache_map(Smi::FromInt(0));
+  set_instanceof_cache_answer(Smi::FromInt(0));
+
   CreateFixedStubs();
 
   if (InitializeNumberStringCache()->IsFailure()) return false;
 
   // Allocate cache for single character ASCII strings.
   obj = AllocateFixedArray(String::kMaxAsciiCharCode + 1, TENURED);
   if (obj->IsFailure()) return false;
   set_single_character_string_cache(FixedArray::cast(obj));
 
   // Allocate cache for external strings pointing to native source code.
@@ skipping 2689 matching lines @@
 void ExternalStringTable::TearDown() {
   new_space_strings_.Free();
   old_space_strings_.Free();
 }
 
 
 List<Object*> ExternalStringTable::new_space_strings_;
 List<Object*> ExternalStringTable::old_space_strings_;
 
 } }  // namespace v8::internal