Flesh out vector ic state query and set mechanisms.

src/type-feedback-vector.h

Index: src/type-feedback-vector.h
diff --git a/src/type-feedback-vector.h b/src/type-feedback-vector.h
index de5a7e151266ed2ad32cea574b6b315c022f0211..e42051798c74b676ede638747d0377e4936d5604 100644
--- a/src/type-feedback-vector.h
+++ b/src/type-feedback-vector.h
@@ -202,6 +202,9 @@ class FeedbackNexus {
     return NULL;
   }
 
+  // TODO(mvstanton): remove FindAllMaps, it didn't survive a code review.
+  void FindAllMaps(MapHandleList* maps) const { ExtractMaps(maps); }
+
   virtual InlineCacheState StateFromFeedback() const = 0;
   virtual int ExtractMaps(MapHandleList* maps) const = 0;
   virtual MaybeHandle<Code> FindHandlerForMap(Handle<Map> map) const = 0;
@@ -250,6 +253,8 @@ class CallICNexus : public FeedbackNexus {
     DCHECK(vector->GetKind(slot) == Code::CALL_IC);
   }
 
+  void Clear(Code* host);
+
   void ConfigureUninitialized();
   void ConfigureGeneric();
   void ConfigureMonomorphicArray();
@@ -269,6 +274,65 @@ class CallICNexus : public FeedbackNexus {
     return length == 0;
   }
 };
+
+
+class LoadICNexus : public FeedbackNexus {
+ public:
+  LoadICNexus(Handle<TypeFeedbackVector> vector, FeedbackVectorICSlot slot)
+      : FeedbackNexus(vector, slot) {
+    DCHECK(vector->GetKind(slot) == Code::LOAD_IC);
+  }
+  LoadICNexus(TypeFeedbackVector* vector, FeedbackVectorICSlot slot)
+      : FeedbackNexus(vector, slot) {
+    DCHECK(vector->GetKind(slot) == Code::LOAD_IC);
+  }
+
+  void Clear(Code* host);
+
+  void ConfigureMegamorphic();
+  void ConfigurePremonomorphic();
+  void ConfigureMonomorphic(Handle<HeapType> type, Handle<Code> handler);
+
+  void ConfigurePolymorphic(TypeHandleList* types, CodeHandleList* handlers);
+
+  virtual InlineCacheState StateFromFeedback() const OVERRIDE;
+  virtual int ExtractMaps(MapHandleList* maps) const OVERRIDE;
+  virtual MaybeHandle<Code> FindHandlerForMap(Handle<Map> map) const OVERRIDE;
+  virtual bool FindHandlers(CodeHandleList* code_list,
+                            int length = -1) const OVERRIDE;
+};
+
+
+class KeyedLoadICNexus : public FeedbackNexus {
+ public:
+  KeyedLoadICNexus(Handle<TypeFeedbackVector> vector, FeedbackVectorICSlot slot)
+      : FeedbackNexus(vector, slot) {
+    DCHECK(vector->GetKind(slot) == Code::KEYED_LOAD_IC);
+  }
+  KeyedLoadICNexus(TypeFeedbackVector* vector, FeedbackVectorICSlot slot)
+      : FeedbackNexus(vector, slot) {
+    DCHECK(vector->GetKind(slot) == Code::KEYED_LOAD_IC);
+  }
+
+  void Clear(Code* host);
+
+  void ConfigureMegamorphic();
+  void ConfigureGeneric();
+  void ConfigurePremonomorphic();
+  // name can be a null handle for element loads.
+  void ConfigureMonomorphic(Handle<Name> name, Handle<HeapType> type,
+                            Handle<Code> handler);
+  // name can be null.
+  void ConfigurePolymorphic(Handle<Name> name, TypeHandleList* types,
+                            CodeHandleList* handlers);
+
+  virtual InlineCacheState StateFromFeedback() const OVERRIDE;
+  virtual int ExtractMaps(MapHandleList* maps) const OVERRIDE;
+  virtual MaybeHandle<Code> FindHandlerForMap(Handle<Map> map) const OVERRIDE;
+  virtual bool FindHandlers(CodeHandleList* code_list,
+                            int length = -1) const OVERRIDE;
+  virtual Name* FindFirstName() const OVERRIDE;
+};
 }
 }  // namespace v8::internal