WIP: type profiling.

src/feedback-vector.h

Index: src/feedback-vector.h
diff --git a/src/feedback-vector.h b/src/feedback-vector.h
index 15625e98b3fe9581047f66682d0982bfa69a03df..e0f015797e8ca5b16b05dce19a49141a4db486cb 100644
--- a/src/feedback-vector.h
+++ b/src/feedback-vector.h
@@ -35,6 +35,7 @@ enum class FeedbackSlotKind {
   kCompareOp,
   kToBoolean,
   kStoreDataPropertyInLiteral,
+  kTypeProfile,
   kCreateClosure,
   kLiteral,
   // This is a general purpose slot that occupies one feedback vector element.
@@ -140,6 +141,11 @@ class FeedbackVectorSpecBase {
     return AddSlot(FeedbackSlotKind::kStoreDataPropertyInLiteral);
   }
 
+  FeedbackSlot AddTypeProfileSlot() {
+    DCHECK(FLAG_type_profile);
+    return AddSlot(FeedbackSlotKind::kTypeProfile);
+  }
+
 #ifdef OBJECT_PRINT
   // For gdb debugging.
   void Print();
@@ -713,8 +719,8 @@ class StoreDataPropertyInLiteralICNexus : public FeedbackNexus {
   StoreDataPropertyInLiteralICNexus(Handle<FeedbackVector> vector,
                                     FeedbackSlot slot)
       : FeedbackNexus(vector, slot) {
-    DCHECK_EQ(FeedbackSlotKind::kStoreDataPropertyInLiteral,
-              vector->GetKind(slot));
+    //    DCHECK_EQ(FeedbackSlotKind::kStoreDataPropertyInLiteral,
+    //              vector->GetKind(slot));
   }
   StoreDataPropertyInLiteralICNexus(FeedbackVector* vector, FeedbackSlot slot)
       : FeedbackNexus(vector, slot) {