[turbofan] escape analysis supports arguments object and rest elements

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 14339 matching lines @@
              << ")}";
           break;
         }
 
         case Translation::DUPLICATED_OBJECT: {
           int object_index = iterator.Next();
           os << "{object_index=" << object_index << "}";
           break;
         }
 
+        case Translation::ARGUMENTS_ELEMENTS: {
+          os << "{arguments elements}";

[Jarin, 2017/02/15 16:17:15]

Should not this also print the 'skip' argument? Could you make sure that
--print-code-verbose works after your changes?

+          break;
+        }
+
         case Translation::ARGUMENTS_OBJECT:
         case Translation::CAPTURED_OBJECT: {
           int args_length = iterator.Next();
           os << "{length=" << args_length << "}";
           break;
         }
       }
       os << "\n";
     }
   }
@@ skipping 5700 matching lines @@
       // depend on this.
       return DICTIONARY_ELEMENTS;
     }
     DCHECK_LE(kind, LAST_ELEMENTS_KIND);
     return kind;
   }
 }
 
 }  // namespace internal
 }  // namespace v8