Customized support for feedback on calls to Array.

src/ast.h

 // Copyright 2012 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_AST_H_
 #define V8_AST_H_
 
 #include "v8.h"
 
 #include "assembler.h"
@@ skipping 1712 matching lines @@
   const BailoutId load_id_;
 
   SmallMapList receiver_types_;
   bool is_for_call_ : 1;
   bool is_uninitialized_ : 1;
   bool is_string_access_ : 1;
   bool is_function_prototype_ : 1;
 };
 
 
+class AllocationSiteInfo: public ZoneObject {

[danno, 2014/05/16 16:34:11]

CallInfo? Don't wrap this puppy until we actually have another usage where you
need this abstraction.

[mvstanton, 2014/05/19 13:45:24]

Sounds good.

+ public:
+  explicit AllocationSiteInfo(Handle<AllocationSite> allocation_site)
+      : allocation_site_(allocation_site) {}
+
+  ElementsKind elements_kind() const {
+    return allocation_site_->GetElementsKind();
+  }
+  Handle<AllocationSite> allocation_site() const {
+    return allocation_site_;
+  }
+
+ private:
+  Handle<AllocationSite> allocation_site_;
+};
+
+
 class Call V8_FINAL : public Expression, public FeedbackSlotInterface {
  public:
   DECLARE_NODE_TYPE(Call)
 
   Expression* expression() const { return expression_; }
   ZoneList<Expression*>* arguments() const { return arguments_; }
 
   // Type feedback information.
   virtual int ComputeFeedbackSlotCount() { return 1; }
   virtual void SetFirstFeedbackSlot(int slot) {
@@ skipping 12 matching lines @@
     return NULL;
   }
 
   virtual bool IsMonomorphic() V8_OVERRIDE {
     if (expression()->IsProperty()) {
       return expression()->AsProperty()->IsMonomorphic();
     }
     return !target_.is_null();
   }
 
+  bool global_call() const {
+    VariableProxy* proxy = expression_->AsVariableProxy();
+    return proxy != NULL && proxy->var()->IsUnallocated();
+  }
+
+  bool known_global_function() const {
+    return global_call() && !target_.is_null();
+  }
+
   Handle<JSFunction> target() { return target_; }
 
   Handle<Cell> cell() { return cell_; }
 
   void set_target(Handle<JSFunction> target) { target_ = target; }
+  void set_extra_info(Zone* zone, Handle<AllocationSite> site);
   bool ComputeGlobalTarget(Handle<GlobalObject> global, LookupResult* lookup);
 
   BailoutId ReturnId() const { return return_id_; }
 
+  ZoneObject* extra_info() { return extra_info_; }
+
   enum CallType {
     POSSIBLY_EVAL_CALL,
     GLOBAL_CALL,
     LOOKUP_SLOT_CALL,
     PROPERTY_CALL,
     OTHER_CALL
   };
 
   // Helpers to determine how to handle the call.
   CallType GetCallType(Isolate* isolate) const;
   bool IsUsingCallFeedbackSlot(Isolate* isolate) const;
 
 #ifdef DEBUG
   // Used to assert that the FullCodeGenerator records the return site.
   bool return_is_recorded_;
 #endif
 
  protected:
   Call(Zone* zone,
        Expression* expression,
        ZoneList<Expression*>* arguments,
        int pos)
       : Expression(zone, pos),
         expression_(expression),
         arguments_(arguments),
+        extra_info_(NULL),
         call_feedback_slot_(kInvalidFeedbackSlot),
         return_id_(GetNextId(zone)) {
     if (expression->IsProperty()) {
       expression->AsProperty()->mark_for_call();
     }
   }
 
  private:
   Expression* expression_;
   ZoneList<Expression*>* arguments_;
 
   Handle<JSFunction> target_;
   Handle<Cell> cell_;
+  ZoneObject* extra_info_;
   int call_feedback_slot_;
 
   const BailoutId return_id_;
 };
 
 
 class CallNew V8_FINAL : public Expression, public FeedbackSlotInterface {
  public:
   DECLARE_NODE_TYPE(CallNew)
 
@@ skipping 1511 matching lines @@
 
  private:
   Zone* zone_;
   Visitor visitor_;
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_AST_H_