Crankshaft support for polymorphic array handling

src/type-info.h

 // Copyright 2011 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 18 matching lines @@
 #define V8_TYPE_INFO_H_
 
 #include "allocation.h"
 #include "globals.h"
 #include "zone.h"
 #include "zone-inl.h"
 
 namespace v8 {
 namespace internal {
 
+const int kMaxKeyedPolymorphism = 4;
+
 //         Unknown
 //           |   \____________
 //           |                |
 //      Primitive       Non-primitive
 //           |   \_______     |
 //           |           |    |
 //        Number       String |
 //         /   \         |    |
 //    Double  Integer32  |   /
 //        |      |      /   /
@@ skipping 160 matching lines @@
 class CountOperation;
 class CompilationInfo;
 class Property;
 class CaseClause;
 
 class TypeFeedbackOracle BASE_EMBEDDED {
  public:
   TypeFeedbackOracle(Handle<Code> code, Handle<Context> global_context);
 
   bool LoadIsMonomorphicNormal(Property* expr);
+  bool LoadIsMegamorphicWithTypeInfo(Property* expr);
   bool StoreIsMonomorphicNormal(Expression* expr);
+  bool StoreIsMegamorphicWithTypeInfo(Expression* expr);
   bool CallIsMonomorphic(Call* expr);
 
   Handle<Map> LoadMonomorphicReceiverType(Property* expr);
   Handle<Map> StoreMonomorphicReceiverType(Expression* expr);
 
   ZoneMapList* LoadReceiverTypes(Property* expr, Handle<String> name);
   ZoneMapList* StoreReceiverTypes(Assignment* expr, Handle<String> name);
   ZoneMapList* CallReceiverTypes(Call* expr,
                                  Handle<String> name,
                                  CallKind call_kind);
+  void CollectKeyedReceiverTypes(unsigned ast_id,
+                                 ZoneMapList* types);
 
   CheckType GetCallCheckType(Call* expr);
   Handle<JSObject> GetPrototypeForPrimitiveCheck(CheckType check);
 
   bool LoadIsBuiltin(Property* expr, Builtins::Name id);
 
   // Get type information for arithmetic operations and compares.
   TypeInfo UnaryType(UnaryOperation* expr);
   TypeInfo BinaryType(BinaryOperation* expr);
   TypeInfo CompareType(CompareOperation* expr);
@@ skipping 20 matching lines @@
 
   Handle<Context> global_context_;
   Handle<NumberDictionary> dictionary_;
 
   DISALLOW_COPY_AND_ASSIGN(TypeFeedbackOracle);
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_TYPE_INFO_H_