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

src/x64/code-stubs-x64.cc

Index: src/x64/code-stubs-x64.cc
diff --git a/src/x64/code-stubs-x64.cc b/src/x64/code-stubs-x64.cc
index a4c772f5ba6c47c6e2b91b9ba454944755729676..25c9336e108fce9e108aed50607d318c5cad5cb6 100644
--- a/src/x64/code-stubs-x64.cc
+++ b/src/x64/code-stubs-x64.cc
@@ -1786,6 +1786,7 @@ static void GenerateRecordCallTarget(MacroAssembler* masm) {
   Isolate* isolate = masm->isolate();
   Label initialize, done, miss, megamorphic, not_array_function,
       done_no_smi_convert;
+  Label done_increment_count;
 
   // Load the cache state into r11.
   __ SmiToInteger32(rdx, rdx);
@@ -1799,7 +1800,7 @@ static void GenerateRecordCallTarget(MacroAssembler* masm) {
   // type-feedback-vector.h).
   Label check_allocation_site;
   __ cmpp(rdi, FieldOperand(r11, WeakCell::kValueOffset));
-  __ j(equal, &done, Label::kFar);
+  __ j(equal, &done_increment_count, Label::kFar);
   __ CompareRoot(r11, Heap::kmegamorphic_symbolRootIndex);
   __ j(equal, &done, Label::kFar);
   __ CompareRoot(FieldOperand(r11, HeapObject::kMapOffset),
@@ -1823,7 +1824,7 @@ static void GenerateRecordCallTarget(MacroAssembler* masm) {
   __ LoadNativeContextSlot(Context::ARRAY_FUNCTION_INDEX, r11);
   __ cmpp(rdi, r11);
   __ j(not_equal, &megamorphic);
-  __ jmp(&done);
+  __ jmp(&done_increment_count);
 
   __ bind(&miss);
 
@@ -1842,6 +1843,11 @@ static void GenerateRecordCallTarget(MacroAssembler* masm) {
   // indicate the ElementsKind if function is the Array constructor.
   __ bind(&initialize);
 
+  // Initialize the call counter.
+  __ Move(FieldOperand(rbx, rdx, times_pointer_size,
+                       FixedArray::kHeaderSize + kPointerSize),
+          Smi::FromInt(ConstructICNexus::kCallCountIncrement));
+
   // Make sure the function is the Array() function
   __ LoadNativeContextSlot(Context::ARRAY_FUNCTION_INDEX, r11);
   __ cmpp(rdi, r11);
@@ -1856,6 +1862,11 @@ static void GenerateRecordCallTarget(MacroAssembler* masm) {
   CallStubInRecordCallTarget(masm, &weak_cell_stub);
   __ jmp(&done_no_smi_convert);
 
+  __ bind(&done_increment_count);
+  __ SmiAddConstant(FieldOperand(rbx, rdx, times_pointer_size,
+                                 FixedArray::kHeaderSize + kPointerSize),
+                    Smi::FromInt(ConstructICNexus::kCallCountIncrement));
+
   __ bind(&done);
   __ Integer32ToSmi(rdx, rdx);
 
@@ -1863,7 +1874,7 @@ static void GenerateRecordCallTarget(MacroAssembler* masm) {
 }
 
 
-void CallConstructStub::Generate(MacroAssembler* masm) {
+void ConstructICStub::Generate(MacroAssembler* masm) {
   // rax : number of arguments
   // rbx : feedback vector
   // rdx : slot in feedback vector (Smi)