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

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"
 
 namespace v8 {
 namespace internal {
@@ skipping 85 matching lines @@
 
 // static
 int Bytecodes::MaximumNumberOfOperands() { return kMaxOperands; }
 
 
 // static
 int Bytecodes::MaximumSize() { return 1 + kMaxOperands; }
 
 
 // static
+bool Bytecodes::IsJump(Bytecode bytecode) {
+  return bytecode == Bytecode::kJump || bytecode == Bytecode::kJumpIfTrue ||
+         bytecode == Bytecode::kJumpIfFalse;
+}
+
+
+// static
+bool Bytecodes::IsJumpConstant(Bytecode bytecode) {
+  return bytecode == Bytecode::kJumpConstant ||
+         bytecode == Bytecode::kJumpIfTrueConstant ||
+         bytecode == Bytecode::kJumpIfFalseConstant;
+}
+
+
+// static
 std::ostream& Bytecodes::Decode(std::ostream& os, const uint8_t* bytecode_start,
                                 int parameter_count) {
   Vector<char> buf = Vector<char>::New(50);
 
   Bytecode bytecode = Bytecodes::FromByte(bytecode_start[0]);
   int bytecode_size = Bytecodes::Size(bytecode);
 
   for (int i = 0; i < bytecode_size; i++) {
     SNPrintF(buf, "%02x ", bytecode_start[i]);
     os << buf.start();
@@ skipping 88 matching lines @@
 uint8_t Register::ToOperand() const { return static_cast<uint8_t>(-index_); }
 
 
 Register Register::FromOperand(uint8_t operand) {
   return Register(-static_cast<int8_t>(operand));
 }
 
 }  // namespace interpreter
 }  // namespace internal
 }  // namespace v8