Polymorphism support for load IC.

src/code-stubs.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 65 matching lines @@
   V(ArrayNoArgumentConstructor)          \
   V(ArraySingleArgumentConstructor)      \
   V(ArrayNArgumentsConstructor)          \
   V(KeyedStoreElement)                   \
   V(DebuggerStatement)                   \
   V(StringDictionaryLookup)              \
   V(ElementsTransitionAndStore)          \
   V(TransitionElementsKind)              \
   V(StoreArrayLiteralElement)            \
   V(StubFailureTrampoline)               \
-  V(ProfileEntryHook)
+  V(ProfileEntryHook)                    \
+  /* IC Handler stubs */                 \
+  V(LoadField)
 
 // List of code stubs only used on ARM platforms.
 #ifdef V8_TARGET_ARCH_ARM
 #define CODE_STUB_LIST_ARM(V)  \
   V(GetProperty)               \
   V(SetProperty)               \
   V(InvokeBuiltin)             \
   V(RegExpCEntry)              \
   V(DirectCEntry)
 #else
@@ skipping 84 matching lines @@
   // Generates the assembler code for the stub.
   virtual Handle<Code> GenerateCode() = 0;
 
   // BinaryOpStub needs to override this.
   virtual InlineCacheState GetICState() {
     return UNINITIALIZED;
   }
   virtual Code::ExtraICState GetExtraICState() {
     return Code::kNoExtraICState;
   }
+  virtual Code::StubType GetStubType() {
+    return Code::NORMAL;
+  }
 
   // Returns whether the code generated for this stub needs to be allocated as
   // a fixed (non-moveable) code object.
   virtual bool NeedsImmovableCode() { return false; }
 
  private:
   // Perform bookkeeping required after code generation when stub code is
   // initially generated.
   void RecordCodeGeneration(Code* code, Isolate* isolate);
 
@@ skipping 403 matching lines @@
 };
 
 
 class StringLengthStub: public ICStub {
  public:
   StringLengthStub(Code::Kind kind, bool support_wrapper)
       : ICStub(kind), support_wrapper_(support_wrapper) { }
   virtual void Generate(MacroAssembler* masm);
 
  private:
+  STATIC_ASSERT(KindBits::kSize == 4);
   class WrapperModeBits: public BitField<bool, 4, 1> {};
   virtual CodeStub::Major MajorKey() { return StringLength; }
   virtual int MinorKey() {
     return KindBits::encode(kind()) | WrapperModeBits::encode(support_wrapper_);
   }
 
   bool support_wrapper_;
 };
 
 
 class StoreICStub: public ICStub {
  public:
   StoreICStub(Code::Kind kind, StrictModeFlag strict_mode)
       : ICStub(kind), strict_mode_(strict_mode) { }
 
  protected:
   virtual Code::ExtraICState GetExtraICState() {
     return strict_mode_;
   }
 
  private:
+  STATIC_ASSERT(KindBits::kSize == 4);
   class StrictModeBits: public BitField<bool, 4, 1> {};
   virtual int MinorKey() {
     return KindBits::encode(kind()) | StrictModeBits::encode(strict_mode_);
   }
 
   StrictModeFlag strict_mode_;
 };
 
 
 class StoreArrayLengthStub: public StoreICStub {
  public:
   explicit StoreArrayLengthStub(Code::Kind kind, StrictModeFlag strict_mode)
       : StoreICStub(kind, strict_mode) { }
   virtual void Generate(MacroAssembler* masm);
 
  private:
   virtual CodeStub::Major MajorKey() { return StoreArrayLength; }
 };
 
 
+class HandlerStub: public ICStub {
+ public:
+  explicit HandlerStub(Code::Kind kind) : ICStub(kind) { }
+
+ protected:
+  virtual Code::ExtraICState GetExtraICState() {
+    return Code::HANDLER_FRAGMENT;
+  }
+};
+
+
+class LoadFieldStub: public HandlerStub {
+ public:
+  LoadFieldStub(Register reg, bool inobject, int index)
+      : HandlerStub(Code::LOAD_IC),
+        reg_(reg),
+        inobject_(inobject),
+        index_(index) { }
+  virtual void Generate(MacroAssembler* masm);
+
+ protected:
+  virtual Code::StubType GetStubType() { return Code::FIELD; }
+
+ private:
+  STATIC_ASSERT(KindBits::kSize == 4);
+  class RegisterBits: public BitField<int, 4, 6> {};
+  class InobjectBits: public BitField<bool, 10, 1> {};
+  class IndexBits: public BitField<int, 11, 11> {};
+  virtual CodeStub::Major MajorKey() { return LoadField; }
+  virtual int MinorKey() {
+    return KindBits::encode(kind())
+        | RegisterBits::encode(reg_.code())
+        | InobjectBits::encode(inobject_)
+        | IndexBits::encode(index_);
+  }
+
+  Register reg_;
+  bool inobject_;
+  int index_;
+};
+
+
 class BinaryOpStub: public PlatformCodeStub {
  public:
   BinaryOpStub(Token::Value op, OverwriteMode mode)
       : op_(op),
         mode_(mode),
         platform_specific_bit_(false),
         left_type_(BinaryOpIC::UNINITIALIZED),
         right_type_(BinaryOpIC::UNINITIALIZED),
         result_type_(BinaryOpIC::UNINITIALIZED) {
     Initialize();
@@ skipping 900 matching lines @@
 
   // The current function entry hook.
   static FunctionEntryHook entry_hook_;
 
   DISALLOW_COPY_AND_ASSIGN(ProfileEntryHookStub);
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_CODE_STUBS_H_