[Interpreter] Collect String feedback on CompareOps.

src/compiler/js-typed-lowering.cc

 // Copyright 2014 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.
 
 #include "src/compiler/js-typed-lowering.h"
 
 #include "src/ast/modules.h"
 #include "src/builtins/builtins-utils.h"
 #include "src/code-factory.h"
 #include "src/compilation-dependencies.h"
@@ skipping 51 matching lines @@
           *hint = NumberOperationHint::kSignedSmall;
           return true;
         case CompareOperationHint::kNumber:
           *hint = NumberOperationHint::kNumber;
           return true;
         case CompareOperationHint::kNumberOrOddball:
           *hint = NumberOperationHint::kNumberOrOddball;
           return true;
         case CompareOperationHint::kAny:
         case CompareOperationHint::kNone:
+        case CompareOperationHint::kString:
           break;
       }
     }
     return false;
   }
 
   // Check if a string addition will definitely result in creating a ConsString,
   // i.e. if the combined length of the resulting string exceeds the ConsString
   // minimum length.
   bool ShouldCreateConsString() {
@@ skipping 2192 matching lines @@
 }
 
 
 CompilationDependencies* JSTypedLowering::dependencies() const {
   return dependencies_;
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8