[Interpreter] Collect String feedback on CompareOps.

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 131 matching lines @@
 
 // Helper function to transform the feedback to CompareOperationHint.
 CompareOperationHint CompareOperationHintFromFeedback(int type_feedback) {
   switch (type_feedback) {
     case CompareOperationFeedback::kNone:
       return CompareOperationHint::kNone;
     case CompareOperationFeedback::kSignedSmall:
       return CompareOperationHint::kSignedSmall;
     case CompareOperationFeedback::kNumber:
       return CompareOperationHint::kNumber;
+    case CompareOperationFeedback::kString:
+      return CompareOperationHint::kString;
     default:
       return CompareOperationHint::kAny;
   }
   UNREACHABLE();
   return CompareOperationHint::kNone;
 }
 
 void TypeFeedbackVector::ComputeCounts(int* with_type_info, int* generic,
                                        int* vector_ic_count,
                                        bool code_is_interpreted) {
@@ skipping 126 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_