Track number of generic ICs per function

src/objects-inl.h

Index: src/objects-inl.h
diff --git a/src/objects-inl.h b/src/objects-inl.h
index 301f177ef018a5ce82155c042690ceb1a642adbd..b88dac937a52aa0b69398dd0647f3b25a27a85c7 100644
--- a/src/objects-inl.h
+++ b/src/objects-inl.h
@@ -7061,6 +7061,7 @@ int TypeFeedbackInfo::ic_with_type_info_count() {
 
 
 void TypeFeedbackInfo::change_ic_with_type_info_count(int delta) {
+  if (delta == 0) return;
   int value = Smi::cast(READ_FIELD(this, kStorage2Offset))->value();
   int new_count = ICsWithTypeInfoCountField::decode(value) + delta;
   // We can get negative count here when the type-feedback info is
@@ -7076,9 +7077,25 @@ void TypeFeedbackInfo::change_ic_with_type_info_count(int delta) {
 }
 
 
+int TypeFeedbackInfo::ic_generic_count() {
+  return Smi::cast(READ_FIELD(this, kStorage3Offset))->value();
+}
+
+
+void TypeFeedbackInfo::change_ic_generic_count(int delta) {
+  if (delta == 0) return;
+  int new_count = ic_generic_count() + delta;
+  if (new_count >= 0) {
+    new_count &= ~Smi::kMinValue;
+    WRITE_FIELD(this, kStorage3Offset, Smi::FromInt(new_count));
+  }
+}
+
+
 void TypeFeedbackInfo::initialize_storage() {
   WRITE_FIELD(this, kStorage1Offset, Smi::FromInt(0));
   WRITE_FIELD(this, kStorage2Offset, Smi::FromInt(0));
+  WRITE_FIELD(this, kStorage3Offset, Smi::FromInt(0));
 }