[turbofan] compute arguments length in deoptimizer

src/objects.cc

 // Copyright 2015 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/objects.h"
 
 #include <cmath>
 #include <iomanip>
 #include <memory>
 #include <sstream>
@@ skipping 14478 matching lines @@
              << ")}";
           break;
         }
 
         case Translation::DUPLICATED_OBJECT: {
           int object_index = iterator.Next();
           os << "{object_index=" << object_index << "}";
           break;
         }
 
-        case Translation::ARGUMENTS_ELEMENTS: {
+        case Translation::ARGUMENTS_ELEMENTS:
+        case Translation::ARGUMENTS_LENGTH: {
           bool is_rest = iterator.Next();
           os << "{is_rest=" << (is_rest ? "true" : "false") << "}";
           break;
         }
 
         case Translation::ARGUMENTS_OBJECT:
         case Translation::CAPTURED_OBJECT: {
           int args_length = iterator.Next();
           os << "{length=" << args_length << "}";
           break;
@@ skipping 5757 matching lines @@
       // depend on this.
       return DICTIONARY_ELEMENTS;
     }
     DCHECK_LE(kind, LAST_ELEMENTS_KIND);
     return kind;
   }
 }
 
 }  // namespace internal
 }  // namespace v8