Reland: [Compiler] Enable handles created during parsing and scope analysis to be deferred.

src/compiler-dispatcher/compiler-dispatcher.h

 // Copyright 2016 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.
 
 #ifndef V8_COMPILER_DISPATCHER_COMPILER_DISPATCHER_H_
 #define V8_COMPILER_DISPATCHER_COMPILER_DISPATCHER_H_
 
 #include <map>
 #include <memory>
 #include <unordered_set>
@@ skipping 10 matching lines @@
 namespace v8 {
 
 class Platform;
 enum class MemoryPressureLevel;
 
 namespace internal {
 
 class CancelableTaskManager;
 class CompilerDispatcherJob;
 class CompilerDispatcherTracer;
+class DeferredHandles;
 class FunctionLiteral;
 class Isolate;
 class SharedFunctionInfo;
+class Zone;
 
 template <typename T>
 class Handle;
 
 // The CompilerDispatcher uses a combination of idle tasks and background tasks
 // to parse and compile lazily parsed functions.
 //
 // As both parsing and compilation currently requires a preparation and
 // finalization step that happens on the main thread, every task has to be
 // advanced during idle time first. Depending on the properties of the task, it
@@ skipping 31 matching lines @@
   // Enqueue a job for parse and compile. Returns true if a job was enqueued.
   bool Enqueue(Handle<SharedFunctionInfo> function);
 
   // Like Enqueue, but also advances the job so that it can potentially
   // continue running on a background thread (if at all possible). Returns
   // true if the job was enqueued.
   bool EnqueueAndStep(Handle<SharedFunctionInfo> function);
 
   // Enqueue a job for compilation. Function must have already been parsed and
   // analyzed and be ready for compilation. Returns true if a job was enqueued.
-  bool Enqueue(Handle<SharedFunctionInfo> function, FunctionLiteral* literal);
+  bool Enqueue(Handle<SharedFunctionInfo> function, FunctionLiteral* literal,
+               std::shared_ptr<Zone> parse_zone,
+               std::shared_ptr<DeferredHandles> parse_handles,
+               std::shared_ptr<DeferredHandles> compile_handles);
 
   // Like Enqueue, but also advances the job so that it can potentially
   // continue running on a background thread (if at all possible). Returns
   // true if the job was enqueued.
   bool EnqueueAndStep(Handle<SharedFunctionInfo> function,
-                      FunctionLiteral* literal);
+                      FunctionLiteral* literal,
+                      std::shared_ptr<Zone> parse_zone,
+                      std::shared_ptr<DeferredHandles> parse_handles,
+                      std::shared_ptr<DeferredHandles> compile_handles);
 
   // Returns true if there is a pending job for the given function.
   bool IsEnqueued(Handle<SharedFunctionInfo> function) const;
 
   // Blocks until the given function is compiled (and does so as fast as
   // possible). Returns true if the compile job was successful.
   bool FinishNow(Handle<SharedFunctionInfo> function);
 
   // Blocks until all enqueued jobs have finished. Returns true if all the
   // compile jobs were successful.
@@ skipping 85 matching lines @@
   base::AtomicValue<bool> block_for_testing_;
   base::Semaphore semaphore_for_testing_;
 
   DISALLOW_COPY_AND_ASSIGN(CompilerDispatcher);
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_DISPATCHER_COMPILER_DISPATCHER_H_