Add monomorphic CompareNilICs and Crankshaft support

src/ic.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 41 matching lines @@
   /* Utilities for IC stubs. */                       \
   ICU(StoreCallbackProperty)                          \
   ICU(LoadPropertyWithInterceptorOnly)                \
   ICU(LoadPropertyWithInterceptorForLoad)             \
   ICU(LoadPropertyWithInterceptorForCall)             \
   ICU(KeyedLoadPropertyWithInterceptor)               \
   ICU(StoreInterceptorProperty)                       \
   ICU(UnaryOp_Patch)                                  \
   ICU(BinaryOp_Patch)                                 \
   ICU(CompareIC_Miss)                                 \
+  ICU(CompareNilIC_Miss)                              \
   ICU(Unreachable)                                    \
   ICU(ToBoolean_Patch)
 //
 // IC is the base class for LoadIC, StoreIC, CallIC, KeyedLoadIC,
 // and KeyedStoreIC.
 //
 class IC {
  public:
   // The ids for utility called from the generated code.
   enum UtilityId {
@@ skipping 697 matching lines @@
   static Code* GetRawUninitialized(Token::Value op);
 
   static void Clear(Address address, Code* target);
 
   Token::Value op_;
 
   friend class IC;
 };
 
 
+class CompareNilIC: public IC {
+ public:
+  explicit CompareNilIC(Isolate* isolate) : IC(EXTRA_CALL_FRAME, isolate) {}
+
+  MUST_USE_RESULT MaybeObject* CompareNil(Handle<Object> object);
+
+  static Handle<Code> GetUninitialized();
+
+  static Code* GetRawUninitialized(EqualityKind kind, NilValue nil);
+
+  static void Clear(Address address, Code* target);
+
+  void patch(Code* code);
+
+  static MUST_USE_RESULT MaybeObject* DoCompareNilSlow(EqualityKind kind,
+                                                       NilValue nil,
+                                                       Handle<Object> object);
+};
+
+
 class ToBooleanIC: public IC {
  public:
   explicit ToBooleanIC(Isolate* isolate) : IC(NO_EXTRA_FRAME, isolate) { }
 
   void patch(Code* code);
 };
 
 
 // Helper for BinaryOpIC and CompareIC.
 enum InlinedSmiCheck { ENABLE_INLINED_SMI_CHECK, DISABLE_INLINED_SMI_CHECK };
 void PatchInlinedSmiCode(Address address, InlinedSmiCheck check);
 
 DECLARE_RUNTIME_FUNCTION(MaybeObject*, KeyedLoadIC_MissFromStubFailure);
 DECLARE_RUNTIME_FUNCTION(MaybeObject*, KeyedStoreIC_MissFromStubFailure);
+DECLARE_RUNTIME_FUNCTION(MaybeObject*, CompareNilIC_Miss);
+
 
 } }  // namespace v8::internal
 
 #endif  // V8_IC_H_