[strong] Implement strong mode semantics for the count operation.

src/ic/ic-state.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/v8.h"
 
 #include "src/ic/ic.h"
 #include "src/ic/ic-state.h"
 
 namespace v8 {
@@ skipping 205 matching lines @@
     return Type::Unsigned32(zone);
   }
   DCHECK_NE(GENERIC, result_kind);
   return KindToType(result_kind, zone);
 }
 
 
 std::ostream& operator<<(std::ostream& os, const BinaryOpICState& s) {
   os << "(" << Token::Name(s.op_);
   if (s.CouldCreateAllocationMementos()) os << "_CreateAllocationMementos";
+  if (is_strong(s.strength())) os << "_Strong";
   os << ":" << BinaryOpICState::KindToString(s.left_kind_) << "*";
   if (s.fixed_right_arg_.IsJust()) {
     os << s.fixed_right_arg_.FromJust();
   } else {
     os << BinaryOpICState::KindToString(s.right_kind_);
   }
   return os << "->" << BinaryOpICState::KindToString(s.result_kind_) << ")";
 }
 
 
@@ skipping 269 matching lines @@
     case UNIQUE_NAME:
     case OBJECT:
     case GENERIC:
       return GENERIC;
   }
   UNREACHABLE();
   return GENERIC;  // Make the compiler happy.
 }
 }  // namespace internal
 }  // namespace v8