AllocationSite objects weakly linked for traversal

src/hydrogen-instructions.h

 // Copyright 2012 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
@@ skipping 113 matching lines @@
   V(InstanceOfKnownGlobal)                     \
   V(InstanceSize)                              \
   V(InvokeFunction)                            \
   V(IsConstructCallAndBranch)                  \
   V(IsObjectAndBranch)                         \
   V(IsNumberAndBranch)                         \
   V(IsStringAndBranch)                         \
   V(IsSmiAndBranch)                            \
   V(IsUndetectableAndBranch)                   \
   V(LeaveInlined)                              \
+  V(LinkObjectInList)                          \
   V(LoadContextSlot)                           \
   V(LoadExternalArrayPointer)                  \
   V(LoadFunctionPrototype)                     \
   V(LoadGlobalCell)                            \
   V(LoadGlobalGeneric)                         \
   V(LoadKeyed)                                 \
   V(LoadKeyedGeneric)                          \
   V(LoadNamedField)                            \
   V(LoadNamedFieldPolymorphic)                 \
   V(LoadNamedGeneric)                          \
@@ skipping 5175 matching lines @@
   }
 
   static HObjectAccess ForArrayLength() {
     return HObjectAccess(kArrayLengths, JSArray::kLengthOffset);
   }
 
   static HObjectAccess ForAllocationSiteTransitionInfo() {
     return HObjectAccess(kInobject, AllocationSite::kTransitionInfoOffset);
   }
 
+  static HObjectAccess ForAllocationSiteWeakNext() {
+    return HObjectAccess(kInobject, AllocationSite::kWeakNextOffset);
+  }
+
   static HObjectAccess ForFixedArrayLength() {
     return HObjectAccess(kArrayLengths, FixedArray::kLengthOffset);
   }
 
   static HObjectAccess ForPropertiesPointer() {
     return HObjectAccess(kInobject, JSObject::kPropertiesOffset);
   }
 
   static HObjectAccess ForPrototypeOrInitialMap() {
     return HObjectAccess(kInobject, JSFunction::kPrototypeOrInitialMapOffset);
@@ skipping 70 matching lines @@
 
   friend class HLoadNamedField;
   friend class HStoreNamedField;
 
   inline Portion portion() const {
     return PortionField::decode(value_);
   }
 };
 
 
+class HLinkObjectInList: public HUnaryOperation {
+ public:
+  // There needs to be a mapping from every KnownList to an external reference
+  enum KnownList {
+    ALLOCATION_SITE_LIST
+  };
+
+  HLinkObjectInList(HValue* object, HObjectAccess store_field,
+                    KnownList known_list)
+      : HUnaryOperation(object),
+      store_field_(store_field),

[Michael Starzinger, 2013/07/17 11:25:30]

nit: Indentation is off.

[mvstanton, 2013/07/17 11:49:00]

Done.

+      known_list_(known_list) {
+    set_representation(Representation::Tagged());
+  }
+
+  HObjectAccess store_field() const { return store_field_; }
+  KnownList known_list() const { return known_list_; }
+
+  virtual Representation RequiredInputRepresentation(int index) {
+    return Representation::Tagged();
+  }
+
+  virtual void PrintDataTo(StringStream* stream);
+
+  DECLARE_CONCRETE_INSTRUCTION(LinkObjectInList)
+
+ private:
+  HObjectAccess store_field_;
+  KnownList known_list_;
+};
+
+
 class HLoadNamedField: public HTemplateInstruction<2> {
  public:
   HLoadNamedField(HValue* object,
                   HObjectAccess access,
                   HValue* typecheck = NULL,
                   Representation field_representation
                       = Representation::Tagged())
       : access_(access),
         field_representation_(field_representation) {
     ASSERT(object != NULL);
@@ skipping 1209 matching lines @@
   virtual bool IsDeletable() const { return true; }
 };
 
 
 #undef DECLARE_INSTRUCTION
 #undef DECLARE_CONCRETE_INSTRUCTION
 
 } }  // namespace v8::internal
 
 #endif  // V8_HYDROGEN_INSTRUCTIONS_H_