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

src/arm64/code-stubs-arm64.cc

Index: src/arm64/code-stubs-arm64.cc
diff --git a/src/arm64/code-stubs-arm64.cc b/src/arm64/code-stubs-arm64.cc
index 3e28e38923e4ca8a745935185f67deb16a447acf..67ab1641dee186dadbb1a89d3ad66efc3a7f2def 100644
--- a/src/arm64/code-stubs-arm64.cc
+++ b/src/arm64/code-stubs-arm64.cc
@@ -2644,6 +2644,7 @@ static void GenerateRecordCallTarget(MacroAssembler* masm, Register argc,
   //  feedback_vector : the feedback vector
   //  index :           slot in feedback vector (smi)
   Label initialize, done, miss, megamorphic, not_array_function;
+  Label done_increment_count;
 
   DCHECK_EQ(*TypeFeedbackVector::MegamorphicSentinel(masm->isolate()),
             masm->isolate()->heap()->megamorphic_symbol());
@@ -2666,7 +2667,7 @@ static void GenerateRecordCallTarget(MacroAssembler* masm, Register argc,
   Label check_allocation_site;
   __ Ldr(feedback_value, FieldMemOperand(feedback, WeakCell::kValueOffset));
   __ Cmp(function, feedback_value);
-  __ B(eq, &done);
+  __ B(eq, &done_increment_count);
   __ CompareRoot(feedback, Heap::kmegamorphic_symbolRootIndex);
   __ B(eq, &done);
   __ Ldr(feedback_map, FieldMemOperand(feedback, HeapObject::kMapOffset));
@@ -2688,7 +2689,7 @@ static void GenerateRecordCallTarget(MacroAssembler* masm, Register argc,
   __ LoadNativeContextSlot(Context::ARRAY_FUNCTION_INDEX, scratch1);
   __ Cmp(function, scratch1);
   __ B(ne, &megamorphic);
-  __ B(&done);
+  __ B(&done_increment_count);
 
   __ Bind(&miss);
 
@@ -2708,6 +2709,13 @@ static void GenerateRecordCallTarget(MacroAssembler* masm, Register argc,
   // indicate the ElementsKind if function is the Array constructor.
   __ Bind(&initialize);
 
+  // Initialize the call counter.
+  __ Mov(scratch1, Smi::FromInt(ConstructICNexus::kCallCountIncrement));
+  __ Adds(scratch2, feedback_vector,
+          Operand::UntagSmiAndScale(index, kPointerSizeLog2));
+  __ Str(scratch1,
+         FieldMemOperand(scratch2, FixedArray::kHeaderSize + kPointerSize));
+
   // Make sure the function is the Array() function
   __ LoadNativeContextSlot(Context::ARRAY_FUNCTION_INDEX, scratch1);
   __ Cmp(function, scratch1);
@@ -2725,11 +2733,23 @@ static void GenerateRecordCallTarget(MacroAssembler* masm, Register argc,
   CreateWeakCellStub weak_cell_stub(masm->isolate());
   CallStubInRecordCallTarget(masm, &weak_cell_stub, argc, function,
                              feedback_vector, index, new_target);
+  __ B(&done);
+
+  __ bind(&done_increment_count);
+  __ Adds(scratch2, feedback_vector,
+          Operand::UntagSmiAndScale(index, kPointerSizeLog2));
+  __ Ldr(scratch1,
+         FieldMemOperand(scratch2, FixedArray::kHeaderSize + kPointerSize));
+  __ Add(scratch1, scratch1,
+         Operand(Smi::FromInt(CallICNexus::kCallCountIncrement)));
+  __ Str(scratch1,
+         FieldMemOperand(scratch2, FixedArray::kHeaderSize + kPointerSize));
+
   __ Bind(&done);
 }
 
 
-void CallConstructStub::Generate(MacroAssembler* masm) {
+void ConstructICStub::Generate(MacroAssembler* masm) {
   ASM_LOCATION("CallConstructStub::Generate");
   // x0 : number of arguments
   // x1 : the function to call