Collect type feedback in separate pass and store it in AST

src/typing.h

 // Copyright 2013 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
 //       with the distribution.
 //     * Neither the name of Google Inc. nor the names of its
 //       contributors may be used to endorse or promote products derived
 //       from this software without specific prior written permission.
 //
 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-#ifndef V8_MARKING_THREAD_H_
-#define V8_MARKING_THREAD_H_
+#ifndef V8_TYPING_H_
+#define V8_TYPING_H_
 
-#include "atomicops.h"
-#include "flags.h"
-#include "platform.h"
-#include "v8utils.h"
+#include "v8.h"
 
-#include "spaces.h"
-
-#include "heap.h"
+#include "allocation.h"
+#include "ast.h"
+#include "compiler.h"
+#include "type-info.h"
+#include "zone.h"
+#include "scopes.h"
 
 namespace v8 {
 namespace internal {
 
-class MarkingThread : public Thread {
+
+class AstTyper: public AstVisitor {
  public:
-  explicit MarkingThread(Isolate* isolate);
+  static void Type(CompilationInfo* info);
 
-  void Run();
-  void Stop();
-  void StartMarking();
-  void WaitForMarkingThread();
+  void* operator new(size_t size, Zone* zone) {
+    return zone->New(static_cast<int>(size));
+  }
+  void operator delete(void* pointer, Zone* zone) { }
+  void operator delete(void* pointer) { }
 
-  ~MarkingThread() {
-    delete start_marking_semaphore_;
-    delete end_marking_semaphore_;
-    delete stop_semaphore_;
-  }
+  DEFINE_AST_VISITOR_SUBCLASS_MEMBERS();
 
  private:
-  Isolate* isolate_;
-  Heap* heap_;
-  Semaphore* start_marking_semaphore_;
-  Semaphore* end_marking_semaphore_;
-  Semaphore* stop_semaphore_;
-  volatile AtomicWord stop_thread_;
-  int id_;
-  static Atomic32 id_counter_;
+  explicit AstTyper(CompilationInfo* info);
+
+  CompilationInfo* info_;
+  TypeFeedbackOracle oracle_;
+
+  TypeFeedbackOracle* oracle() { return &oracle_; }
+  Zone* zone() const { return info_->zone(); }
+
+  void VisitDeclarations(ZoneList<Declaration*>* declarations);
+  void VisitStatements(ZoneList<Statement*>* statements);
+
+#define DECLARE_VISIT(type) virtual void Visit##type(type* node);
+  AST_NODE_LIST(DECLARE_VISIT)
+#undef DECLARE_VISIT
+
+  DISALLOW_COPY_AND_ASSIGN(AstTyper);
 };
 
 } }  // namespace v8::internal
 
-#endif  // V8_MARKING_THREAD_H_
+#endif  // V8_TYPING_H_