[Interpreter] Add support for for..in.

src/interpreter/bytecodes.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/bytecodes.h"
 
 #include "src/frames.h"
 #include "src/interpreter/bytecode-traits.h"
 
 namespace v8 {
@@ skipping 145 matching lines @@
   UNREACHABLE();
   return OperandSize::kNone;
 }
 
 
 // static
 bool Bytecodes::IsJump(Bytecode bytecode) {
   return bytecode == Bytecode::kJump || bytecode == Bytecode::kJumpIfTrue ||
          bytecode == Bytecode::kJumpIfFalse ||
          bytecode == Bytecode::kJumpIfToBooleanTrue ||
-         bytecode == Bytecode::kJumpIfToBooleanFalse;
+         bytecode == Bytecode::kJumpIfToBooleanFalse ||
+         bytecode == Bytecode::kJumpIfNull ||
+         bytecode == Bytecode::kJumpIfUndefined;
 }
 
 
 // static
 bool Bytecodes::IsJumpConstant(Bytecode bytecode) {
   return bytecode == Bytecode::kJumpConstant ||
          bytecode == Bytecode::kJumpIfTrueConstant ||
          bytecode == Bytecode::kJumpIfFalseConstant ||
          bytecode == Bytecode::kJumpIfToBooleanTrueConstant ||
-         bytecode == Bytecode::kJumpIfToBooleanFalseConstant;
+         bytecode == Bytecode::kJumpIfToBooleanFalseConstant ||
+         bytecode == Bytecode::kJumpIfNull ||
+         bytecode == Bytecode::kJumpIfUndefinedConstant;
 }
 
 
 // static
 uint16_t Bytecodes::ShortOperandFromBytes(const uint8_t* bytes) {
   return *reinterpret_cast<const uint16_t*>(bytes);
 }
 
 
 // static
@@ skipping 160 matching lines @@
   }
   if (reg5.is_valid() && reg4.index() + 1 != reg5.index()) {
     return false;
   }
   return true;
 }
 
 }  // namespace interpreter
 }  // namespace internal
 }  // namespace v8