Vector ICs: Adapting store ic classes for vectors.

src/ic/ic.h

Index: src/ic/ic.h
diff --git a/src/ic/ic.h b/src/ic/ic.h
index 9223e7dce8e6e16d396c6bf006813fe8bf7f6e41..6002d9291383819645f1b97f46549c3e5a402372 100644
--- a/src/ic/ic.h
+++ b/src/ic/ic.h
@@ -122,6 +122,11 @@ class IC {
   // Configure the vector for POLYMORPHIC.
   void ConfigureVectorState(Handle<Name> name, MapHandleList* maps,
                             CodeHandleList* handlers);
+  // Configure the vector for POLYMORPHIC with transitions (only for element
+  // keyed stores).
+  void ConfigureVectorState(MapHandleList* maps,
+                            MapHandleList* transitioned_maps,
+                            CodeHandleList* handlers);
 
   char TransitionMarkFromState(IC::State state);
   void TraceIC(const char* type, Handle<Object> name);
@@ -538,10 +543,17 @@ class KeyedStoreIC : public StoreIC {
 
   static KeyedAccessStoreMode GetKeyedAccessStoreMode(
       ExtraICState extra_state) {
+    DCHECK(!FLAG_vector_stores);
     return ExtraICStateKeyedAccessStoreMode::decode(extra_state);
   }
 
+  KeyedAccessStoreMode GetKeyedAccessStoreMode() {
+    DCHECK(FLAG_vector_stores);
+    return casted_nexus<KeyedStoreICNexus>()->GetKeyedAccessStoreMode();
+  }
+
   static IcCheckType GetKeyType(ExtraICState extra_state) {
+    DCHECK(!FLAG_vector_stores);
     return IcCheckTypeField::decode(extra_state);
   }
 
@@ -571,6 +583,8 @@ class KeyedStoreIC : public StoreIC {
 
   static Handle<Code> initialize_stub_in_optimized_code(
       Isolate* isolate, LanguageMode language_mode, State initialization_state);
+  static Handle<Code> ChooseMegamorphicStub(Isolate* isolate,
+                                            ExtraICState extra_state);
 
   static void Clear(Isolate* isolate, Code* host, KeyedStoreICNexus* nexus);