[es6] Re-implement rest parameters via desugaring.

src/interpreter/bytecode-generator.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/interpreter/bytecode-generator.h"
 
 #include <stack>
 
 #include "src/compiler.h"
 #include "src/objects.h"
@@ skipping 245 matching lines @@
     }
     case VariableLocation::GLOBAL:
     case VariableLocation::UNALLOCATED:
     case VariableLocation::CONTEXT:
     case VariableLocation::LOOKUP:
       UNIMPLEMENTED();
   }
 }
 
 
+void BytecodeGenerator::VisitRestParameter(RestParameter* node) {
+  UNREACHABLE();
+}
+
+
 void BytecodeGenerator::VisitAssignment(Assignment* expr) {
   DCHECK(expr->target()->IsValidReferenceExpression());
 
   // Left-hand side can only be a property, a global or a variable slot.
   Property* property = expr->target()->AsProperty();
   LhsKind assign_type = Property::GetAssignType(property);
 
   DCHECK(!expr->is_compound());
   Visit(expr->value());
 
@@ skipping 95 matching lines @@
 
   Visit(left);
   builder().StoreAccumulatorInRegister(temporary);
   Visit(right);
   builder().BinaryOperation(op, temporary);
 }
 
 }  // namespace interpreter
 }  // namespace internal
 }  // namespace v8