[turbofan] Use FastNewClosureStub if possible.

src/compiler/js-operator.h

 // Copyright 2013 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_JS_OPERATOR_H_
 #define V8_COMPILER_JS_OPERATOR_H_
 
 #include "src/runtime/runtime.h"
 #include "src/unique.h"
 
@@ skipping 188 matching lines @@
 bool operator==(StoreNamedParameters const&, StoreNamedParameters const&);
 bool operator!=(StoreNamedParameters const&, StoreNamedParameters const&);
 
 size_t hash_value(StoreNamedParameters const&);
 
 std::ostream& operator<<(std::ostream&, StoreNamedParameters const&);
 
 const StoreNamedParameters& StoreNamedParametersOf(const Operator* op);
 
 
+// Defines shared information for the closure that should be created. This is
+// used as a parameter by JSCreateClosure operators.
+class CreateClosureParameters final {

[titzer, 2015/04/27 08:38:48]

Make me a struct? 

+ public:
+  CreateClosureParameters(Handle<SharedFunctionInfo> shared_info,
+                          PretenureFlag pretenure)
+      : shared_info_(shared_info), pretenure_(pretenure) {}
+
+  Handle<SharedFunctionInfo> shared_info() const { return shared_info_; }
+  PretenureFlag pretenure() const { return pretenure_; }
+
+ private:
+  const Handle<SharedFunctionInfo> shared_info_;
+  const PretenureFlag pretenure_;
+};
+
+bool operator==(CreateClosureParameters const&, CreateClosureParameters const&);
+bool operator!=(CreateClosureParameters const&, CreateClosureParameters const&);
+
+size_t hash_value(CreateClosureParameters const&);
+
+std::ostream& operator<<(std::ostream&, CreateClosureParameters const&);
+
+const CreateClosureParameters& CreateClosureParametersOf(const Operator* op);
+
+
 // Interface for building JavaScript-level operators, e.g. directly from the
 // AST. Most operators have no parameters, thus can be globally shared for all
 // graphs.
 class JSOperatorBuilder final : public ZoneObject {
  public:
   explicit JSOperatorBuilder(Zone* zone);
 
   const Operator* Equal();
   const Operator* NotEqual();
   const Operator* StrictEqual();
@@ skipping 16 matching lines @@
 
   const Operator* UnaryNot();
   const Operator* ToBoolean();
   const Operator* ToNumber();
   const Operator* ToString();
   const Operator* ToName();
   const Operator* ToObject();
   const Operator* Yield();
 
   const Operator* Create();
+  const Operator* CreateClosure(Handle<SharedFunctionInfo> shared_info,
+                                PretenureFlag pretenure);
 
   const Operator* CallFunction(size_t arity, CallFunctionFlags flags);
   const Operator* CallRuntime(Runtime::FunctionId id, size_t arity);
 
   const Operator* CallConstruct(int arguments);
 
   const Operator* LoadProperty(const VectorSlotPair& feedback);
   const Operator* LoadNamed(const Unique<Name>& name,
                             const VectorSlotPair& feedback,
                             ContextualMode contextual_mode = NOT_CONTEXTUAL,
@@ skipping 31 matching lines @@
   Zone* const zone_;
 
   DISALLOW_COPY_AND_ASSIGN(JSOperatorBuilder);
 };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_JS_OPERATOR_H_