[interpreter] Make it possible to optimize without parse.

src/compiler/pipeline.cc

 // Copyright 2014 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/compiler/pipeline.h"
 
 #include <fstream>  // NOLINT(readability/streams)
 #include <sstream>
 
 #include "src/base/adapters.h"
@@ skipping 1060 matching lines @@
   if (FLAG_turbo_stats) {
     pipeline_statistics.Reset(new PipelineStatistics(info(), &zone_pool));
     pipeline_statistics->BeginPhaseKind("initializing");
   }
 
   if (FLAG_trace_turbo) {
     FILE* json_file = OpenVisualizerLogFile(info(), nullptr, "json", "w+");
     if (json_file != nullptr) {
       OFStream json_of(json_file);
       Handle<Script> script = info()->script();
-      FunctionLiteral* function = info()->literal();
       base::SmartArrayPointer<char> function_name = info()->GetDebugName();
       int pos = info()->shared_info()->start_position();
       json_of << "{\"function\":\"" << function_name.get()
               << "\", \"sourcePosition\":" << pos << ", \"source\":\"";
-      if (!script->IsUndefined() && !script->source()->IsUndefined()) {
+      if (info()->has_literal() && !script->IsUndefined() &&
+          !script->source()->IsUndefined()) {
         DisallowHeapAllocation no_allocation;
+        FunctionLiteral* function = info()->literal();
         int start = function->start_position();
         int len = function->end_position() - start;
         String::SubStringRange source(String::cast(script->source()), start,
                                       len);
         for (const auto& c : source) {
           json_of << AsEscapedUC16ForJSON(c);
         }
       }
       json_of << "\",\n\"phases\":[";
       fclose(json_file);
@@ skipping 394 matching lines @@
     tcf << AsC1VRegisterAllocationData("CodeGen",
                                        data->register_allocation_data());
   }
 
   data->DeleteRegisterAllocationZone();
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8