Reland: [Parse] ParseInfo owns the parsing Zone.

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 <memory>
 #include <sstream>
 
@@ skipping 532 matching lines @@
 }
 
 }  // namespace
 
 class PipelineCompilationJob final : public CompilationJob {
  public:
   PipelineCompilationJob(Isolate* isolate, Handle<JSFunction> function)
       // Note that the CompilationInfo is not initialized at the time we pass it
       // to the CompilationJob constructor, but it is not dereferenced there.
       : CompilationJob(isolate, &info_, "TurboFan"),
-        zone_(isolate->allocator(), ZONE_NAME),
+        parse_info_(handle(function->shared())),
         zone_stats_(isolate->allocator()),
-        parse_info_(&zone_, handle(function->shared())),
         info_(&parse_info_, function),
         pipeline_statistics_(CreatePipelineStatistics(info(), &zone_stats_)),
         data_(&zone_stats_, info(), pipeline_statistics_.get()),
         pipeline_(&data_),
         linkage_(nullptr) {}
 
  protected:
   Status PrepareJobImpl() final;
   Status ExecuteJobImpl() final;
   Status FinalizeJobImpl() final;
 
  private:
-  Zone zone_;
+  ParseInfo parse_info_;
   ZoneStats zone_stats_;
-  ParseInfo parse_info_;
   CompilationInfo info_;
   std::unique_ptr<PipelineStatistics> pipeline_statistics_;
   PipelineData data_;
   PipelineImpl pipeline_;
   Linkage* linkage_;
 
   DISALLOW_COPY_AND_ASSIGN(PipelineCompilationJob);
 };
 
 PipelineCompilationJob::Status PipelineCompilationJob::PrepareJobImpl() {
@@ skipping 16 matching lines @@
     if (FLAG_inline_accessors) {
       info()->MarkAsAccessorInliningEnabled();
     }
   }
   if (!info()->is_optimizing_from_bytecode()) {
     if (!Compiler::EnsureDeoptimizationSupport(info())) return FAILED;
   } else if (FLAG_turbo_inlining) {
     info()->MarkAsInliningEnabled();
   }
 
-  linkage_ = new (&zone_) Linkage(Linkage::ComputeIncoming(&zone_, info()));
+  linkage_ = new (info()->zone())
+      Linkage(Linkage::ComputeIncoming(info()->zone(), info()));
 
   if (!pipeline_.CreateGraph()) {
     if (isolate()->has_pending_exception()) return FAILED;  // Stack overflowed.
     return AbortOptimization(kGraphBuildingFailed);
   }
 
   return SUCCEEDED;
 }
 
 PipelineCompilationJob::Status PipelineCompilationJob::ExecuteJobImpl() {
@@ skipping 1396 matching lines @@
   data->DeleteRegisterAllocationZone();
 }
 
 CompilationInfo* PipelineImpl::info() const { return data_->info(); }
 
 Isolate* PipelineImpl::isolate() const { return info()->isolate(); }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8