Provide call counts for constructor calls, surface them as a vector IC.

src/type-feedback-vector.cc

Index: src/type-feedback-vector.cc
diff --git a/src/type-feedback-vector.cc b/src/type-feedback-vector.cc
index 7b7b434f5600154d45b7eba03c37bed8eeb375b7..9d7169e9d6a988406d2b0d255d47df6153c2d3ed 100644
--- a/src/type-feedback-vector.cc
+++ b/src/type-feedback-vector.cc
@@ -109,6 +109,8 @@ const char* TypeFeedbackMetadata::Kind2String(FeedbackVectorSlotKind kind) {
       return "INVALID";
     case FeedbackVectorSlotKind::CALL_IC:
       return "CALL_IC";
+    case FeedbackVectorSlotKind::CONSTRUCT_IC:
+      return "CONSTRUCT_IC";
     case FeedbackVectorSlotKind::LOAD_IC:
       return "LOAD_IC";
     case FeedbackVectorSlotKind::KEYED_LOAD_IC:
@@ -222,6 +224,11 @@ void TypeFeedbackVector::ClearSlotsImpl(SharedFunctionInfo* shared,
           nexus.Clear(shared->code());
           break;
         }
+        case FeedbackVectorSlotKind::CONSTRUCT_IC: {
+          ConstructICNexus nexus(this, slot);
+          nexus.Clear(shared->code());
+          break;
+        }
         case FeedbackVectorSlotKind::LOAD_IC: {
           LoadICNexus nexus(this, slot);
           nexus.Clear(shared->code());
@@ -485,6 +492,18 @@ InlineCacheState CallICNexus::StateFromFeedback() const {
 }
 
 
+Handle<Object> CallICNexus::GetCallFeedback() {
+  Object* feedback = GetFeedback();
+  if (feedback->IsWeakCell()) {
+    feedback = WeakCell::cast(feedback)->value();
+  }
+  if (!feedback->IsJSFunction() && !feedback->IsAllocationSite()) {
+    feedback = GetIsolate()->heap()->undefined_value();
+  }
+  return handle(feedback, GetIsolate());
+}
+
+
 int CallICNexus::ExtractCallCount() {
   Object* call_count = GetFeedbackExtra();
   if (call_count->IsSmi()) {
@@ -498,6 +517,11 @@ int CallICNexus::ExtractCallCount() {
 void CallICNexus::Clear(Code* host) { CallIC::Clear(GetIsolate(), host, this); }
 
 
+void ConstructICNexus::Clear(Code* host) {
+  ConstructIC::Clear(GetIsolate(), host, this);
+}
+
+
 void CallICNexus::ConfigureMonomorphicArray() {
   Object* feedback = GetFeedback();
   if (!feedback->IsAllocationSite()) {