[Interpreter] Add support for for..in.

src/interpreter/bytecode-array-builder.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-array-builder.h"
 
 namespace v8 {
 namespace internal {
 namespace interpreter {
 
@@ skipping 627 matching lines @@
 }
 
 
 BytecodeArrayBuilder& BytecodeArrayBuilder::Return() {
   Output(Bytecode::kReturn);
   exit_seen_in_block_ = true;
   return *this;
 }
 
 
+BytecodeArrayBuilder& BytecodeArrayBuilder::ForInPrepare() {
+  Output(Bytecode::kForInPrepare);
+  return *this;
+}
+
+
+BytecodeArrayBuilder& BytecodeArrayBuilder::ForInNext(Register for_in_state) {
+  Output(Bytecode::kForInNext, for_in_state.ToOperand());
+  return *this;
+}
+
+
+BytecodeArrayBuilder& BytecodeArrayBuilder::ForInDone(Register for_in_state) {
+  Output(Bytecode::kForInDone, for_in_state.ToOperand());
+  return *this;
+}
+
+
 BytecodeArrayBuilder& BytecodeArrayBuilder::EnterBlock() { return *this; }
 
 
 BytecodeArrayBuilder& BytecodeArrayBuilder::LeaveBlock() {
   last_block_end_ = bytecodes()->size();
   exit_seen_in_block_ = false;
   return *this;
 }
 
 
@@ skipping 417 matching lines @@
   DCHECK_GT(next_consecutive_count_, 0);
   builder_->BorrowConsecutiveTemporaryRegister(next_consecutive_register_);
   allocated_.push_back(next_consecutive_register_);
   next_consecutive_count_--;
   return Register(next_consecutive_register_++);
 }
 
 }  // namespace interpreter
 }  // namespace internal
 }  // namespace v8