Add tool to visualize machine code/lithium.

src/code-stubs-hydrogen.cc

 // Copyright 2012 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 128 matching lines @@
   if (FLAG_trace_hydrogen_stubs) {
     const char* name = CodeStub::MajorName(stub()->MajorKey(), false);
     PrintF("-----------------------------------------------------------\n");
     PrintF("Compiling stub %s using hydrogen\n", name);
     isolate()->GetHTracer()->TraceCompilation(&info_);
   }
 
   int param_count = descriptor_->register_param_count_;
   HEnvironment* start_environment = graph()->start_environment();
   HBasicBlock* next_block = CreateBasicBlock(start_environment);
-  current_block()->Goto(next_block);
+  Goto(next_block);
   next_block->SetJoinId(BailoutId::StubEntry());
   set_current_block(next_block);
 
   HConstant* undefined_constant =
       Add<HConstant>(isolate()->factory()->undefined_value());
   graph()->set_undefined_constant(undefined_constant);
 
   for (int i = 0; i < param_count; ++i) {
     HParameter* param =
         Add<HParameter>(i, HParameter::REGISTER_PARAMETER);
@@ skipping 40 matching lines @@
       stack_pop_count->ClearFlag(HValue::kCanOverflow);
     } else {
       int count = descriptor_->hint_stack_parameter_count_;
       stack_pop_count = Add<HConstant>(count);
     }
   }
 
   if (current_block() != NULL) {
     HReturn* hreturn_instruction = New<HReturn>(return_value,
                                                 stack_pop_count);
-    current_block()->Finish(hreturn_instruction);
-    set_current_block(NULL);
+    FinishCurrentBlock(hreturn_instruction);
   }
   return true;
 }
 
 
 template <class Stub>
 class CodeStubGraphBuilder: public CodeStubGraphBuilderBase {
  public:
   explicit CodeStubGraphBuilder(Isolate* isolate, Stub* stub)
       : CodeStubGraphBuilderBase(isolate, stub) {}
@@ skipping 616 matching lines @@
 }
 
 
 template <>
 HValue* CodeStubGraphBuilder<CompareNilICStub>::BuildCodeInitializedStub() {
   Isolate* isolate = graph()->isolate();
   CompareNilICStub* stub = casted_stub();
   HIfContinuation continuation;
   Handle<Map> sentinel_map(isolate->heap()->meta_map());
   Handle<Type> type = stub->GetType(isolate, sentinel_map);
-  BuildCompareNil(GetParameter(0), type, RelocInfo::kNoPosition, &continuation);
+  BuildCompareNil(GetParameter(0), type, &continuation);
   IfBuilder if_nil(this, &continuation);
   if_nil.Then();
   if (continuation.IsFalseReachable()) {
     if_nil.Else();
     if_nil.Return(graph()->GetConstant0());
   }
   if_nil.End();
   return continuation.IsTrueReachable()
       ? graph()->GetConstant1()
       : graph()->GetConstantUndefined();
@@ skipping 383 matching lines @@
   return js_function;
 }
 
 
 Handle<Code> FastNewClosureStub::GenerateCode(Isolate* isolate) {
   return DoGenerateCode(isolate, this);
 }
 
 
 } }  // namespace v8::internal