VM precompiler: Compute and use result type of static initializers of final fields.

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"
 #include "vm/hash_map.h"
 #include "vm/hash_table.h"
@@ skipping 252 matching lines @@
  public:
   static RawError* CompileAll(
       Dart_QualifiedFunctionName embedder_entry_points[],
       bool reset_fields);
 
   static RawError* CompileFunction(Thread* thread, const Function& function);
 
   static RawObject* EvaluateStaticInitializer(const Field& field);
   static RawObject* ExecuteOnce(SequenceNode* fragment);
 
+  static RawFunction* CompileStaticInitializer(const Field& field,
+                                               bool compute_type);
+
  private:
   Precompiler(Thread* thread, bool reset_fields);
 
 
-  static RawFunction* CompileStaticInitializer(const Field& field);
-
   void DoCompileAll(Dart_QualifiedFunctionName embedder_entry_points[]);
   void ClearAllCode();
   void AddRoots(Dart_QualifiedFunctionName embedder_entry_points[]);
   void AddEntryPoints(Dart_QualifiedFunctionName entry_points[]);
   void Iterate();
 
   void AddType(const AbstractType& type);
   void AddTypesOf(const Class& cls);
   void AddTypesOf(const Function& function);
   void AddTypeArguments(const TypeArguments& args);
@@ skipping 21 matching lines @@
 
   void BindStaticCalls();
   void SwitchICCalls();
   void DedupStackmaps();
   void DedupStackmapLists();
   void DedupInstructions();
   void ResetPrecompilerState();
 
   void CollectDynamicFunctionNames();
 
-  class FunctionVisitor : public ValueObject {
+  void PrecompileStaticInitializers();
+
+  template<typename T>
+  class Visitor : public ValueObject {
    public:
-    virtual ~FunctionVisitor() {}
-    virtual void VisitFunction(const Function& function) = 0;
+    virtual ~Visitor() {}
+    virtual void Visit(const T& obj) = 0;
   };
+  typedef Visitor<Function> FunctionVisitor;
+  typedef Visitor<Class> ClassVisitor;
 
   void VisitFunctions(FunctionVisitor* visitor);
+  void VisitClasses(ClassVisitor* visitor);
 
   void FinalizeAllClasses();
 
   Thread* thread() const { return thread_; }
   Zone* zone() const { return zone_; }
   Isolate* isolate() const { return isolate_; }
 
   Thread* thread_;
   Zone* zone_;
   Isolate* isolate_;
@@ skipping 51 matching lines @@
     return function.raw();
   }
 };
 
 typedef UnorderedHashSet<FunctionsTraits> UniqueFunctionsSet;
 
 
 }  // namespace dart
 
 #endif  // VM_PRECOMPILER_H_