harmony-scoping: Implement StoreIC handler for stores to global contexts.

src/code-stubs.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_CODE_STUBS_H_
 #define V8_CODE_STUBS_H_
 
 #include "src/allocation.h"
 #include "src/assembler.h"
 #include "src/codegen.h"
@@ skipping 59 matching lines @@
   V(InternalArraySingleArgumentConstructor) \
   V(KeyedLoadGeneric)                       \
   V(LoadGlobalContextField)                 \
   V(LoadDictionaryElement)                  \
   V(LoadFastElement)                        \
   V(MegamorphicLoad)                        \
   V(NameDictionaryLookup)                   \
   V(NumberToString)                         \
   V(RegExpConstructResult)                  \
   V(StoreFastElement)                       \
+  V(StoreGlobalContextField)                \
   V(StringAdd)                              \
   V(ToBoolean)                              \
   V(TransitionElementsKind)                 \
   V(VectorKeyedLoad)                        \
   V(VectorLoad)                             \
   /* IC Handler stubs */                    \
   V(LoadConstant)                           \
   V(LoadField)                              \
   V(KeyedLoadSloppyArguments)               \
   V(StoreField)                             \
@@ skipping 1920 matching lines @@
   class SkipFastPathBits:
       public BitField<int, 2 * kBitsPerRegisterNumber + 4, 1> {};  // NOLINT
   class SSE3Bits:
       public BitField<int, 2 * kBitsPerRegisterNumber + 5, 1> {};  // NOLINT
 
   DEFINE_NULL_CALL_INTERFACE_DESCRIPTOR();
   DEFINE_PLATFORM_CODE_STUB(DoubleToI, PlatformCodeStub);
 };
 
 
-class LoadGlobalContextFieldStub : public HandlerStub {
+class GlobalContextFieldStub : public HandlerStub {
  public:
-  LoadGlobalContextFieldStub(
-      Isolate* isolate, const GlobalContextTable::LookupResult* lookup_result)
+  GlobalContextFieldStub(Isolate* isolate,
+                         const GlobalContextTable::LookupResult* lookup_result)
       : HandlerStub(isolate) {
     DCHECK(Accepted(lookup_result));
     set_sub_minor_key(ContextIndexBits::encode(lookup_result->context_index) |
                       SlotIndexBits::encode(lookup_result->slot_index));
   }
 
   int context_index() const {
     return ContextIndexBits::decode(sub_minor_key());
   }
 
   int slot_index() const { return SlotIndexBits::decode(sub_minor_key()); }
 
   static bool Accepted(const GlobalContextTable::LookupResult* lookup_result) {
     return ContextIndexBits::is_valid(lookup_result->context_index) &&
            SlotIndexBits::is_valid(lookup_result->slot_index);
   }
 
  private:
   static const int kContextIndexBits = 13;
   static const int kSlotIndexBits = 13;
   class ContextIndexBits : public BitField<int, 0, kContextIndexBits> {};
   class SlotIndexBits
       : public BitField<int, kContextIndexBits, kSlotIndexBits> {};
 
-  virtual Code::Kind kind() const { return Code::LOAD_IC; }
   virtual Code::StubType GetStubType() OVERRIDE { return Code::FAST; }
 
-
-  virtual CallInterfaceDescriptor GetCallInterfaceDescriptor() OVERRIDE {
-    return ContextOnlyDescriptor(isolate());
-  }
-
-  DEFINE_HANDLER_CODE_STUB(LoadGlobalContextField, HandlerStub);
+  DEFINE_CODE_STUB_BASE(GlobalContextFieldStub, HandlerStub);
 };
 
 
+class LoadGlobalContextFieldStub : public GlobalContextFieldStub {
+ public:
+  LoadGlobalContextFieldStub(
+      Isolate* isolate, const GlobalContextTable::LookupResult* lookup_result)
+      : GlobalContextFieldStub(isolate, lookup_result) {}
+
+ private:
+  virtual Code::Kind kind() const OVERRIDE { return Code::LOAD_IC; }
+
+  DEFINE_HANDLER_CODE_STUB(LoadGlobalContextField, GlobalContextFieldStub);
+};
+
+
+class StoreGlobalContextFieldStub : public GlobalContextFieldStub {
+ public:
+  StoreGlobalContextFieldStub(
+      Isolate* isolate, const GlobalContextTable::LookupResult* lookup_result)
+      : GlobalContextFieldStub(isolate, lookup_result) {}
+
+ private:
+  virtual Code::Kind kind() const OVERRIDE { return Code::STORE_IC; }
+
+  DEFINE_HANDLER_CODE_STUB(StoreGlobalContextField, GlobalContextFieldStub);
+};
+
+
 class LoadFastElementStub : public HydrogenCodeStub {
  public:
   LoadFastElementStub(Isolate* isolate, bool is_js_array,
                       ElementsKind elements_kind)
       : HydrogenCodeStub(isolate) {
     set_sub_minor_key(ElementsKindBits::encode(elements_kind) |
                       IsJSArrayBits::encode(is_js_array));
   }
 
   bool is_js_array() const { return IsJSArrayBits::decode(sub_minor_key()); }
@@ skipping 519 matching lines @@
 
 #undef DEFINE_CALL_INTERFACE_DESCRIPTOR
 #undef DEFINE_PLATFORM_CODE_STUB
 #undef DEFINE_HANDLER_CODE_STUB
 #undef DEFINE_HYDROGEN_CODE_STUB
 #undef DEFINE_CODE_STUB
 #undef DEFINE_CODE_STUB_BASE
 } }  // namespace v8::internal
 
 #endif  // V8_CODE_STUBS_H_