[strong] Implement strong property access semantics

src/code-stubs.h

Index: src/code-stubs.h
diff --git a/src/code-stubs.h b/src/code-stubs.h
index 25d082bf4bac91859e07d10b6ccbffae1a71841f..c6f124ec6921ac4f6d503e2b581dc5c914445179 100644
--- a/src/code-stubs.h
+++ b/src/code-stubs.h
@@ -2105,24 +2105,37 @@ class StringCharAtGenerator {
 
 class LoadDictionaryElementStub : public HydrogenCodeStub {
  public:
-  explicit LoadDictionaryElementStub(Isolate* isolate)
-      : HydrogenCodeStub(isolate) {}
+  explicit LoadDictionaryElementStub(Isolate* isolate, const LoadICState& state)
+      : HydrogenCodeStub(isolate) {
+    minor_key_ = state.GetExtraICState();
+  }
 
   CallInterfaceDescriptor GetCallInterfaceDescriptor() override {
     return LoadWithVectorDescriptor(isolate());
   }
 
+  LanguageMode language_mode() const {
+    return LoadICState::GetLanguageMode(MinorKey());
+  }
+
   DEFINE_HYDROGEN_CODE_STUB(LoadDictionaryElement, HydrogenCodeStub);
 };
 
 
 class KeyedLoadGenericStub : public HydrogenCodeStub {
  public:
-  explicit KeyedLoadGenericStub(Isolate* isolate) : HydrogenCodeStub(isolate) {}
+  explicit KeyedLoadGenericStub(Isolate* isolate, const LoadICState& state)
+      : HydrogenCodeStub(isolate) {
+    minor_key_ = state.GetExtraICState();
+  }
 
   Code::Kind GetCodeKind() const override { return Code::KEYED_LOAD_IC; }
   InlineCacheState GetICState() const override { return GENERIC; }
 
+  LanguageMode language_mode() const {
+    return LoadICState::GetLanguageMode(MinorKey());
+  }
+
   DEFINE_CALL_INTERFACE_DESCRIPTOR(Load);
 
   DEFINE_HYDROGEN_CODE_STUB(KeyedLoadGeneric, HydrogenCodeStub);
@@ -2144,7 +2157,7 @@ class LoadICTrampolineStub : public PlatformCodeStub {
     return static_cast<ExtraICState>(minor_key_);
   }
 
- private:
+ protected:
   LoadICState state() const {
     return LoadICState(static_cast<ExtraICState>(minor_key_));
   }
@@ -2156,8 +2169,8 @@ class LoadICTrampolineStub : public PlatformCodeStub {
 
 class KeyedLoadICTrampolineStub : public LoadICTrampolineStub {
  public:
-  explicit KeyedLoadICTrampolineStub(Isolate* isolate)
-      : LoadICTrampolineStub(isolate, LoadICState(0)) {}
+  explicit KeyedLoadICTrampolineStub(Isolate* isolate, const LoadICState& state)
+      : LoadICTrampolineStub(isolate, state) {}
 
   Code::Kind GetCodeKind() const override { return Code::KEYED_LOAD_IC; }
 
@@ -2263,12 +2276,18 @@ class LoadICStub : public PlatformCodeStub {
 
 class KeyedLoadICStub : public PlatformCodeStub {
  public:
-  explicit KeyedLoadICStub(Isolate* isolate) : PlatformCodeStub(isolate) {}
+  explicit KeyedLoadICStub(Isolate* isolate, const LoadICState& state)
+      : PlatformCodeStub(isolate) {
+    minor_key_ = state.GetExtraICState();
+  }
 
   void GenerateForTrampoline(MacroAssembler* masm);
 
   Code::Kind GetCodeKind() const override { return Code::KEYED_LOAD_IC; }
   InlineCacheState GetICState() const final { return DEFAULT; }
+  ExtraICState GetExtraICState() const final {
+    return static_cast<ExtraICState>(minor_key_);
+  }
 
   DEFINE_CALL_INTERFACE_DESCRIPTOR(LoadWithVector);
   DEFINE_PLATFORM_CODE_STUB(KeyedLoadIC, PlatformCodeStub);
@@ -2312,6 +2331,9 @@ class VectorKeyedStoreICStub : public PlatformCodeStub {
 
   Code::Kind GetCodeKind() const final { return Code::KEYED_STORE_IC; }
   InlineCacheState GetICState() const final { return DEFAULT; }
+  virtual ExtraICState GetExtraICState() const final {
+    return static_cast<ExtraICState>(minor_key_);
+  }
 
   DEFINE_CALL_INTERFACE_DESCRIPTOR(VectorStoreIC);
   DEFINE_PLATFORM_CODE_STUB(VectorKeyedStoreIC, PlatformCodeStub);