Initial tree-shaking for precompilation: only selective compilation, no removal of unused Functions…

runtime/vm/precompiler.h

 // Copyright (c) 2015, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #ifndef VM_PRECOMPILER_H_
 #define VM_PRECOMPILER_H_
 
 #include "vm/allocation.h"
 
 namespace dart {
 
 // Forward declarations.
+class Class;
+class Error;
+class Field;
+class Function;
+class GrowableObjectArray;
 class RawError;
+class String;
 
-class Precompiler : public AllStatic {
+class Precompiler : public ValueObject {
  public:
   static RawError* CompileAll();
+
+ private:
+  explicit Precompiler(Thread* thread);
+
+  void DoCompileAll();
+  void ClearAllCode();
+  void AddRoots();
+  void Iterate();
+  void CleanUp();
+
+  void AddCalleesOf(const Function& function);
+  void AddField(const Field& field);
+  void AddFunction(const Function& function);
+  void AddClass(const Class& cls);
+  void AddSelector(const String& selector);
+  bool IsSent(const String& selector);
+
+  void ProcessFunction(const Function& function);
+  void CheckForNewDynamicFunctions();
+
+  Thread* thread() const { return thread_; }
+  Zone* zone() const { return zone_; }
+  Isolate* isolate() const { return isolate_; }
+
+  Thread* thread_;
+  Zone* zone_;
+  Isolate* isolate_;
+
+  bool changed_;
+  intptr_t function_count_;
+  intptr_t class_count_;
+
+  const GrowableObjectArray& libraries_;
+  const GrowableObjectArray& pending_functions_;
+  const GrowableObjectArray& collected_closures_;
+  const GrowableObjectArray& sent_selectors_;
+  Error& error_;
 };
 
 }  // namespace dart
 
 #endif  // VM_PRECOMPILER_H_