[Interpreter] Add for/while/do support to the bytecode generator.

src/interpreter/bytecodes.h

 // 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.
 
 #ifndef V8_INTERPRETER_BYTECODES_H_
 #define V8_INTERPRETER_BYTECODES_H_
 
 #include <iosfwd>
 
 // Clients of this interface shouldn't depend on lots of interpreter internals.
@@ skipping 160 matching lines @@
 
   // Returns the size of the bytecode including its operands.
   static int Size(Bytecode bytecode);
 
   // The maximum number of operands across all bytecodes.
   static int MaximumNumberOfOperands();
 
   // Maximum size of a bytecode and its operands.
   static int MaximumSize();
 
+  // Return true if the bytecode is a jump or a conditional jump taking
+  // an immediate byte operand (OperandType::kImm8).
+  static bool IsJump(Bytecode bytecode);
+
+  // Return true if the bytecode is a jump or conditional jump taking a
+  // constant pool entry (OperandType::kIdx).
+  static bool IsJumpConstant(Bytecode bytecode);
+
   // Decode a single bytecode and operands to |os|.
   static std::ostream& Decode(std::ostream& os, const uint8_t* bytecode_start,
                               int number_of_parameters);
 
  private:
   DISALLOW_IMPLICIT_CONSTRUCTORS(Bytecodes);
 };
 
 std::ostream& operator<<(std::ostream& os, const Bytecode& bytecode);
 std::ostream& operator<<(std::ostream& os, const OperandType& operand_type);
 
 }  // namespace interpreter
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_INTERPRETER_BYTECODES_H_