Add tool to visualize machine code/lithium.

src/hydrogen-osr.cc

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 36 matching lines @@
   ASSERT(graph->osr() == NULL);
 
   // remember this builder as the one OSR builder in the graph.
   graph->set_osr(this);
 
   HBasicBlock* non_osr_entry = graph->CreateBasicBlock();
   osr_entry_ = graph->CreateBasicBlock();
   HValue* true_value = graph->GetConstantTrue();
   HBranch* test = builder_->New<HBranch>(true_value, ToBooleanStub::Types(),
                                          non_osr_entry, osr_entry_);
-  builder_->current_block()->Finish(test);
+  builder_->FinishCurrentBlock(test);
 
   HBasicBlock* loop_predecessor = graph->CreateBasicBlock();
-  non_osr_entry->Goto(loop_predecessor);
+  builder_->Goto(non_osr_entry, loop_predecessor);
 
   builder_->set_current_block(osr_entry_);
   osr_entry_->set_osr_entry();
   BailoutId osr_entry_id = statement->OsrEntryId();
 
   HEnvironment *environment = builder_->environment();
   int first_expression_index = environment->first_expression_index();
   int length = environment->length();
   osr_values_ = new(zone) ZoneList<HUnknownOSRValue*>(length, zone);
 
@@ skipping 19 matching lines @@
 
   // Keep a copy of the old environment, since the OSR values need it
   // to figure out where exactly they are located in the unoptimized frame.
   environment = environment->Copy();
   builder_->current_block()->UpdateEnvironment(environment);
 
   builder_->Add<HSimulate>(osr_entry_id);
   builder_->Add<HOsrEntry>(osr_entry_id);
   HContext* context = builder_->Add<HContext>();
   environment->BindContext(context);
-  builder_->current_block()->Goto(loop_predecessor);
+  builder_->Goto(loop_predecessor);
   loop_predecessor->SetJoinId(statement->EntryId());
   builder_->set_current_block(loop_predecessor);
 
   // Create the final loop entry
   osr_loop_entry_ = builder_->BuildLoopEntry();
   return osr_loop_entry_;
 }
 
 
 void HOsrBuilder::FinishGraph() {
   // do nothing for now.
 }
 
 
 void HOsrBuilder::FinishOsrValues() {
   const ZoneList<HPhi*>* phis = osr_loop_entry_->phis();
   for (int j = 0; j < phis->length(); j++) {
     HPhi* phi = phis->at(j);
     if (phi->HasMergedIndex()) {
       osr_values_->at(phi->merged_index())->set_incoming_value(phi);
     }
   }
 }
 
 } }  // namespace v8::internal