[turbofan] Add a PhaseScope for initialization.

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/platform/elapsed-timer.h"
@@ skipping 58 matching lines @@
         frame_(nullptr),
         register_allocator_(nullptr) {}
 
   ~PipelineData() {
     DeleteInstructionZone();
     DeleteGraphZone();
   }
 
   // For main entry point.
   void Initialize(PipelineStatistics* pipeline_statistics) {
+    PhaseScope scope(pipeline_statistics, "init pipeline data");
     outer_zone_ = info()->zone();
     pipeline_statistics_ = pipeline_statistics;
     graph_zone_ = graph_zone_scope_.zone();
     graph_ = new (graph_zone()) Graph(graph_zone());
     source_positions_.Reset(new SourcePositionTable(graph()));
     machine_ = new (graph_zone()) MachineOperatorBuilder(
         graph_zone(), kMachPtr,
         InstructionSelector::SupportedMachineOperatorFlags());
     common_ = new (graph_zone()) CommonOperatorBuilder(graph_zone());
     javascript_ = new (graph_zone()) JSOperatorBuilder(graph_zone());
@@ skipping 619 matching lines @@
       // TODO(turbofan): Make OSR work and remove this bailout.
       info()->is_osr()) {
     return Handle<Code>::null();
   }
 
   ZonePool zone_pool(isolate());
   SmartPointer<PipelineStatistics> pipeline_statistics;
 
   if (FLAG_turbo_stats) {
     pipeline_statistics.Reset(new PipelineStatistics(info(), &zone_pool));
+    pipeline_statistics->BeginPhaseKind("initializing");
   }
 
   PipelineData data(&zone_pool, info());
   this->data_ = &data;
   data.Initialize(pipeline_statistics.get());
 
   BeginPhaseKind("graph creation");
 
   if (FLAG_trace_turbo) {
     OFStream os(stdout);
@@ skipping 296 matching lines @@
 }
 
 
 void Pipeline::TearDown() {
   InstructionOperand::TearDownCaches();
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8