Type Feedback Vector: Calculate profiler counts on the fly.

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 f4cf4705fd7895485ddf719e76c7bb611cb51c15..f0bc691e835934466eb3a9ac577b317450d10e3b 100644
--- a/src/arm64/code-stubs-arm64.cc
+++ b/src/arm64/code-stubs-arm64.cc
@@ -2827,10 +2827,6 @@ void CallICStub::Generate(MacroAssembler* masm) {
   // x1 - function
   // x3 - slot id (Smi)
   // x2 - vector
-  const int with_types_offset =
-      FixedArray::OffsetOfElementAt(TypeFeedbackVector::kWithTypesIndex);
-  const int generic_offset =
-      FixedArray::OffsetOfElementAt(TypeFeedbackVector::kGenericCountIndex);
   Label extra_checks_or_miss, call, call_function;
   int argc = arg_count();
   ParameterCount actual(argc);
@@ -2908,13 +2904,6 @@ void CallICStub::Generate(MacroAssembler* masm) {
          Operand::UntagSmiAndScale(index, kPointerSizeLog2));
   __ LoadRoot(x5, Heap::kmegamorphic_symbolRootIndex);
   __ Str(x5, FieldMemOperand(x4, FixedArray::kHeaderSize));
-  // We have to update statistics for runtime profiling.
-  __ Ldr(x4, FieldMemOperand(feedback_vector, with_types_offset));
-  __ Subs(x4, x4, Operand(Smi::FromInt(1)));
-  __ Str(x4, FieldMemOperand(feedback_vector, with_types_offset));
-  __ Ldr(x4, FieldMemOperand(feedback_vector, generic_offset));
-  __ Adds(x4, x4, Operand(Smi::FromInt(1)));
-  __ Str(x4, FieldMemOperand(feedback_vector, generic_offset));
 
   __ Bind(&call);
   __ Mov(x0, argc);
@@ -2942,11 +2931,6 @@ void CallICStub::Generate(MacroAssembler* masm) {
   __ Cmp(x4, x5);
   __ B(ne, &miss);
 
-  // Update stats.
-  __ Ldr(x4, FieldMemOperand(feedback_vector, with_types_offset));
-  __ Adds(x4, x4, Operand(Smi::FromInt(1)));
-  __ Str(x4, FieldMemOperand(feedback_vector, with_types_offset));
-
   // Initialize the call counter.
   __ Mov(x5, Smi::FromInt(CallICNexus::kCallCountIncrement));
   __ Adds(x4, feedback_vector,