[es6] implement destructuring assignment

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 "src/compiler.h"
 #include "src/interpreter/control-flow-builders.h"
 #include "src/objects.h"
 #include "src/parser.h"
@@ skipping 930 matching lines @@
   Register flags = temporary_register_scope.NewRegister();
   builder()
       ->LoadLiteral(expr->flags())
       .StoreAccumulatorInRegister(flags)
       .LoadLiteral(expr->pattern())
       .CreateRegExpLiteral(expr->literal_index(), flags);
   execution_result()->SetResultInAccumulator();
 }
 
 
+void BytecodeGenerator::VisitAssignmentPattern(AssignmentPattern* expr) {
+  Visit(expr->expression());
+}
+
+
 void BytecodeGenerator::VisitObjectLiteral(ObjectLiteral* expr) {
   // Deep-copy the literal boilerplate.
   builder()
       ->LoadLiteral(expr->constant_properties())
       .CreateObjectLiteral(expr->literal_index(), expr->ComputeFlags(true));
 
   TemporaryRegisterScope temporary_register_scope(builder());
   Register literal;
 
   // Store computed values into the literal.
@@ skipping 1199 matching lines @@
 }
 
 
 int BytecodeGenerator::feedback_index(FeedbackVectorSlot slot) const {
   return info()->feedback_vector()->GetIndex(slot);
 }
 
 }  // namespace interpreter
 }  // namespace internal
 }  // namespace v8