VectorICs: VisitClassLiteral needs adjustment for IC slot usage.

src/full-codegen/full-codegen.cc

Index: src/full-codegen/full-codegen.cc
diff --git a/src/full-codegen/full-codegen.cc b/src/full-codegen/full-codegen.cc
index 4b32e96582dbe419ce1c3c2600295866792c9b8c..409895b2b31013fd118b5be67338e9b4809ecf78 100644
--- a/src/full-codegen/full-codegen.cc
+++ b/src/full-codegen/full-codegen.cc
@@ -1310,9 +1310,11 @@ void FullCodeGenerator::VisitClassLiteral(ClassLiteral* lit) {
 
     if (lit->scope() != NULL) {
       DCHECK_NOT_NULL(lit->class_variable_proxy());
-      FeedbackVectorICSlot slot = FLAG_vector_stores
-                                      ? lit->GetNthSlot(store_slot_index++)
-                                      : FeedbackVectorICSlot::Invalid();
+      FeedbackVectorICSlot slot =
+          FLAG_vector_stores &&
+                  lit->class_variable_proxy()->var()->IsUnallocated()
+              ? lit->GetNthSlot(store_slot_index++)
+              : FeedbackVectorICSlot::Invalid();
       EmitVariableAssignment(lit->class_variable_proxy()->var(),
                              Token::INIT_CONST, slot);
     }