[turbofan] Also count megamorphic ICs as ICs with feedback.

src/type-feedback-vector-inl.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_TYPE_FEEDBACK_VECTOR_INL_H_
 #define V8_TYPE_FEEDBACK_VECTOR_INL_H_
 
 #include "src/globals.h"
 #include "src/type-feedback-vector.h"
 
@@ skipping 167 matching lines @@
       case FeedbackVectorSlotKind::KEYED_LOAD_IC:
       case FeedbackVectorSlotKind::STORE_SLOPPY_IC:
       case FeedbackVectorSlotKind::STORE_STRICT_IC:
       case FeedbackVectorSlotKind::KEYED_STORE_SLOPPY_IC:
       case FeedbackVectorSlotKind::KEYED_STORE_STRICT_IC:
       case FeedbackVectorSlotKind::STORE_DATA_PROPERTY_IN_LITERAL_IC: {
         if (obj->IsWeakCell() || obj->IsFixedArray() || obj->IsString()) {
           with++;
         } else if (obj == megamorphic_sentinel) {
           gen++;
+          if (code_is_interpreted) with++;
         }
         total++;
         break;
       }
       case FeedbackVectorSlotKind::INTERPRETER_BINARYOP_IC:
         // If we are not running interpreted code, we need to ignore the special
         // IC slots for binaryop/compare used by the interpreter.
         // TODO(mvstanton): Remove code_is_interpreted when full code is retired
         // from service.
         if (code_is_interpreted) {
@@ skipping 100 matching lines @@
   int index = vector()->GetIndex(slot()) + 1;
   vector()->set(index, feedback_extra, mode);
 }
 
 
 Isolate* FeedbackNexus::GetIsolate() const { return vector()->GetIsolate(); }
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TYPE_FEEDBACK_VECTOR_INL_H_