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

src/objects.cc

 // Copyright 2013 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/objects.h"
 
 #include <cmath>
 #include <iomanip>
 #include <sstream>
 
@@ skipping 12488 matching lines @@
   int bytecode_size = 0;
   for (int i = 0; i < this->length(); i += bytecode_size) {
     const uint8_t* bytecode_start = &first_bytecode_address[i];
     interpreter::Bytecode bytecode =
         interpreter::Bytecodes::FromByte(bytecode_start[0]);
     bytecode_size = interpreter::Bytecodes::Size(bytecode);
 
     SNPrintF(buf, "%p", bytecode_start);
     os << buf.start() << " : ";
     interpreter::Bytecodes::Decode(os, bytecode_start, parameter_count());
+    if (bytecode == interpreter::Bytecode::kJump ||
+        bytecode == interpreter::Bytecode::kJumpIfTrue ||
+        bytecode == interpreter::Bytecode::kJumpIfFalse) {

[rmcilroy, 2015/10/01 09:18:56]

nit - could we make a helper for IsJump, IsJumpConstant.

[oth, 2015/10/01 11:43:02]

Done.

+      int offset = static_cast<int8_t>(bytecode_start[1]);
+      SNPrintF(buf, " (%p)", bytecode_start + offset);
+      os << buf.start();
+    } else if (bytecode == interpreter::Bytecode::kJumpConstant ||
+               bytecode == interpreter::Bytecode::kJumpIfTrueConstant ||
+               bytecode == interpreter::Bytecode::kJumpIfFalseConstant) {
+      int index = static_cast<int>(bytecode_start[1]);
+      int offset = Smi::cast(constant_pool()->get(index))->value();
+      SNPrintF(buf, " (%p)", bytecode_start + offset);
+      os << buf.start();
+    }
     os << "\n";
   }
 
   os << "Constant pool (size = " << constant_pool()->length() << ")\n";
   constant_pool()->Print();
 }
 
 
 // static
 void JSArray::Initialize(Handle<JSArray> array, int capacity, int length) {
@@ skipping 4283 matching lines @@
   if (cell->value() != *new_value) {
     cell->set_value(*new_value);
     Isolate* isolate = cell->GetIsolate();
     cell->dependent_code()->DeoptimizeDependentCodeGroup(
         isolate, DependentCode::kPropertyCellChangedGroup);
   }
 }
 
 }  // namespace internal
 }  // namespace v8