[ic] Split LoadIC into LoadGlobalIC and LoadIC.

src/ic/ic.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_IC_H_
 #define V8_IC_H_
 
 #include "src/ic/ic-state.h"
 #include "src/macro-assembler.h"
 #include "src/messages.h"
@@ skipping 29 matching lines @@
     DCHECK(RecomputeHandlerForName(name));
     old_state_ = state_;
     state_ = RECOMPUTE_HANDLER;
   }
 
   // Clear the inline cache to initial state.
   static void Clear(Isolate* isolate, Address address, Address constant_pool);
 
 #ifdef DEBUG
   bool IsLoadStub() const {
-    return kind_ == Code::LOAD_IC || kind_ == Code::KEYED_LOAD_IC;
+    return kind_ == Code::LOAD_IC || kind_ == Code::LOAD_GLOBAL_IC ||
+           kind_ == Code::KEYED_LOAD_IC;
   }
   bool IsStoreStub() const {
     return kind_ == Code::STORE_IC || kind_ == Code::KEYED_STORE_IC;
   }
   bool IsCallStub() const { return kind_ == Code::CALL_IC; }
 #endif
 
   static inline Handle<Map> GetHandlerCacheHolder(Handle<Map> receiver_map,
                                                   bool receiver_is_holder,
                                                   Isolate* isolate,
                                                   CacheHolderFlag* flag);
   static inline Handle<Map> GetICCacheHolder(Handle<Map> receiver_map,
                                              Isolate* isolate,
                                              CacheHolderFlag* flag);
 
   static bool IsCleared(FeedbackNexus* nexus) {
     InlineCacheState state = nexus->StateFromFeedback();
     return !FLAG_use_ic || state == UNINITIALIZED || state == PREMONOMORPHIC;
   }
 
   static bool ICUseVector(Code::Kind kind) {
-    return kind == Code::LOAD_IC || kind == Code::KEYED_LOAD_IC ||
-           kind == Code::CALL_IC || kind == Code::STORE_IC ||
-           kind == Code::KEYED_STORE_IC;
+    return kind == Code::LOAD_IC || kind == Code::LOAD_GLOBAL_IC ||
+           kind == Code::KEYED_LOAD_IC || kind == Code::CALL_IC ||
+           kind == Code::STORE_IC || kind == Code::KEYED_STORE_IC;
   }
 
   static InlineCacheState StateFromCode(Code* code);
 
  protected:
   Address fp() const { return fp_; }
   Address pc() const { return *pc_address_; }
   Isolate* isolate() const { return isolate_; }
 
   // Get the shared function info of the caller.
@@ skipping 186 matching lines @@
   TypeofMode typeof_mode() const {
     return LoadICState::GetTypeofMode(extra_ic_state());
   }
 
   LoadIC(FrameDepth depth, Isolate* isolate, FeedbackNexus* nexus = NULL)
       : IC(depth, isolate, nexus) {
     DCHECK(nexus != NULL);
     DCHECK(IsLoadStub());
   }
 
-  bool ShouldThrowReferenceError(Handle<Object> receiver) {
-    return receiver->IsJSGlobalObject() && typeof_mode() == NOT_INSIDE_TYPEOF;
+  bool ShouldThrowReferenceError() const {
+    return kind() == Code::LOAD_GLOBAL_IC && typeof_mode() == NOT_INSIDE_TYPEOF;
   }
 
   // Code generator routines.
 
   static void GenerateMiss(MacroAssembler* masm);
   static void GenerateRuntimeGetProperty(MacroAssembler* masm);
   static void GenerateNormal(MacroAssembler* masm);
 
   static Handle<Code> initialize_stub_in_optimized_code(
       Isolate* isolate, ExtraICState extra_state);
 
   MUST_USE_RESULT MaybeHandle<Object> Load(Handle<Object> object,
                                            Handle<Name> name);
 
   static void Clear(Isolate* isolate, Code* host, LoadICNexus* nexus);
 
  protected:
-  Handle<Code> slow_stub() const {
+  virtual Handle<Code> slow_stub() const {
     return isolate()->builtins()->LoadIC_Slow();
   }
 
   // Update the inline cache and the global stub cache based on the
   // lookup result.
   void UpdateCaches(LookupIterator* lookup);
 
   Handle<Code> GetMapIndependentHandler(LookupIterator* lookup) override;
 
   Handle<Code> CompileHandler(LookupIterator* lookup, Handle<Object> unused,
                               CacheHolderFlag cache_holder) override;
 
  private:
   Handle<Code> SimpleFieldLoad(FieldIndex index);
 
   friend class IC;
 };
 
+class LoadGlobalIC : public LoadIC {
+ public:
+  LoadGlobalIC(FrameDepth depth, Isolate* isolate, FeedbackNexus* nexus = NULL)
+      : LoadIC(depth, isolate, nexus) {}
+
+  static Handle<Code> initialize_stub_in_optimized_code(
+      Isolate* isolate, ExtraICState extra_state);
+
+  MUST_USE_RESULT MaybeHandle<Object> Load(Handle<Name> name);
+
+  static void Clear(Isolate* isolate, Code* host, LoadGlobalICNexus* nexus);
+
+ protected:
+  Handle<Code> slow_stub() const override {
+    return isolate()->builtins()->LoadGlobalIC_Slow();
+  }
+};
 
 class KeyedLoadIC : public LoadIC {
  public:
   KeyedLoadIC(FrameDepth depth, Isolate* isolate,
               KeyedLoadICNexus* nexus = NULL)
       : LoadIC(depth, isolate, nexus) {
     DCHECK(nexus != NULL);
   }
 
   MUST_USE_RESULT MaybeHandle<Object> Load(Handle<Object> object,
@@ skipping 166 matching lines @@
 
 // Helper for BinaryOpIC and CompareIC.
 enum InlinedSmiCheck { ENABLE_INLINED_SMI_CHECK, DISABLE_INLINED_SMI_CHECK };
 void PatchInlinedSmiCode(Isolate* isolate, Address address,
                          InlinedSmiCheck check);
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_IC_H_