Track elements_kind transitions in KeyedStoreICs.

src/ic.h

 // Copyright 2011 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 324 matching lines @@
   }
 
   static void Clear(Address address, Code* target);
 
   friend class IC;
 };
 
 
 class KeyedIC: public IC {
  public:
+  enum StubKind {
+    LOAD,
+    STORE_NO_TRANSITION,
+    STORE_TRANSITION_SMI_TO_OBJECT,
+    STORE_TRANSITION_SMI_TO_DOUBLE,
+    STORE_TRANSITION_DOUBLE_TO_OBJECT
+  };
   explicit KeyedIC(Isolate* isolate) : IC(NO_EXTRA_FRAME, isolate) {}
   virtual ~KeyedIC() {}
 
   virtual MaybeObject* GetElementStubWithoutMapCheck(
       bool is_js_array,
       ElementsKind elements_kind) = 0;
 
  protected:
   virtual Code* string_stub() {
     return NULL;
   }
 
   virtual Code::Kind kind() const = 0;
 
   MaybeObject* ComputeStub(JSObject* receiver,
-                           bool is_store,
+                           StubKind stub_kind,
                            StrictModeFlag strict_mode,
                            Code* default_stub);
 
   virtual MaybeObject* ConstructMegamorphicStub(
       MapList* receiver_maps,
       CodeList* targets,
       StrictModeFlag strict_mode) = 0;
 
  private:
   void GetReceiverMapsForStub(Code* stub, MapList* result);
 
   MaybeObject* ComputeMonomorphicStubWithoutMapCheck(
       Map* receiver_map,
       StrictModeFlag strict_mode);
 
   MaybeObject* ComputeMonomorphicStub(JSObject* receiver,
-                                      bool is_store,
+                                      StubKind stub_kind,
                                       StrictModeFlag strict_mode,
                                       Code* default_stub);
+
+  MaybeObject* ComputePolymorphicStubWithTransition(JSObject* receiver,
+                                                    MapList* receiver_maps,
+                                                    Map* new_map,
+                                                    StrictModeFlag strict_mode);
+
+  MaybeObject* ComputePolymorphicStub(MapList* receiver_maps,
+                                      StrictModeFlag strict_mode);
+
+  MaybeObject* ComputeTransitionedMap(JSObject* receiver, StubKind stub_kind);
+
+  static bool IsTransitionStubKind(StubKind stub_kind) {
+    return stub_kind > STORE_NO_TRANSITION;
+  }
 };
 
 
 class KeyedLoadIC: public KeyedIC {
  public:
   explicit KeyedLoadIC(Isolate* isolate) : KeyedIC(isolate) {
     ASSERT(target()->is_keyed_load_stub());
   }
 
   MUST_USE_RESULT MaybeObject* Load(State state,
@@ skipping 338 matching lines @@
   void patch(Code* code);
 };
 
 
 // Helper for BinaryOpIC and CompareIC.
 void PatchInlinedSmiCode(Address address);
 
 } }  // namespace v8::internal
 
 #endif  // V8_IC_H_