Add monomorphic CompareNilICs and Crankshaft support

src/type-info.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 235 matching lines @@
   bool LoadIsPolymorphic(Property* expr);
   bool StoreIsMonomorphicNormal(TypeFeedbackId ast_id);
   bool StoreIsPolymorphic(TypeFeedbackId ast_id);
   bool CallIsMonomorphic(Call* expr);
   bool CallNewIsMonomorphic(CallNew* expr);
   bool ObjectLiteralStoreIsMonomorphic(ObjectLiteral::Property* prop);
 
   bool IsForInFastCase(ForInStatement* expr);
 
   Handle<Map> LoadMonomorphicReceiverType(Property* expr);
-  Handle<Map> StoreMonomorphicReceiverType(TypeFeedbackId ast_id);
+  Handle<Map> StoreMonomorphicReceiverType(TypeFeedbackId id);
+  Handle<Map> CompareNilMonomorphicReceiverType(TypeFeedbackId id);
 
   KeyedAccessStoreMode GetStoreMode(TypeFeedbackId ast_id);
 
   void LoadReceiverTypes(Property* expr,
                          Handle<String> name,
                          SmallMapList* types);
   void StoreReceiverTypes(Assignment* expr,
                           Handle<String> name,
                           SmallMapList* types);
   void CallReceiverTypes(Call* expr,
@@ skipping 19 matching lines @@
   Handle<Map> GetObjectLiteralStoreMap(ObjectLiteral::Property* prop);
 
   bool LoadIsBuiltin(Property* expr, Builtins::Name id);
   bool LoadIsStub(Property* expr, ICStub* stub);
 
   // TODO(1571) We can't use ToBooleanStub::Types as the return value because
   // of various cylces in our headers. Death to tons of implementations in
   // headers!! :-P
   byte ToBooleanTypes(TypeFeedbackId ast_id);
 
+  // TODO(1571) We can't use CompareNilICStub::Types as the return value because
+  // of various cylces in our headers. Death to tons of implementations in
+  // headers!! :-P
+  byte CompareNilTypes(TypeFeedbackId ast_id);
+
   // Get type information for arithmetic operations and compares.
   TypeInfo UnaryType(UnaryOperation* expr);
   void BinaryType(BinaryOperation* expr,
                   TypeInfo* left,
                   TypeInfo* right,
                   TypeInfo* result);
   void CompareType(CompareOperation* expr,
                    TypeInfo* left_type,
                    TypeInfo* right_type,
                    TypeInfo* overall_type);
@@ skipping 32 matching lines @@
   Isolate* isolate_;
   Zone* zone_;
   Handle<UnseededNumberDictionary> dictionary_;
 
   DISALLOW_COPY_AND_ASSIGN(TypeFeedbackOracle);
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_TYPE_INFO_H_