Reland "Enable map dependency to in-flight compilation info."

src/objects.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 4962 matching lines @@
   static Code* GetCodeAgeStub(Age age, MarkingParity parity);
 
   // Code aging -- platform-specific
   static void PatchPlatformCodeAge(byte* sequence, Age age,
                                    MarkingParity parity);
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(Code);
 };
 
 
+class CompilationInfo;
+
 // This class describes the layout of dependent codes array of a map. The
 // array is partitioned into several groups of dependent codes. Each group
 // contains codes with the same dependency on the map. The array has the
 // following layout for n dependency groups:
 //
 // +----+----+-----+----+---------+----------+-----+---------+-----------+
 // | C1 | C2 | ... | Cn | group 1 |  group 2 | ... | group n | undefined |
 // +----+----+-----+----+---------+----------+-----+---------+-----------+
 //
 // The first n elements are Smis, each of them specifies the number of codes
@@ skipping 33 matching lines @@
     explicit GroupStartIndexes(DependentCode* entries);
     void Recompute(DependentCode* entries);
     int at(int i) { return start_indexes_[i]; }
     int number_of_entries() { return start_indexes_[kGroupCount]; }
    private:
     int start_indexes_[kGroupCount + 1];
   };
 
   bool Contains(DependencyGroup group, Code* code);
   static Handle<DependentCode> Insert(Handle<DependentCode> entries,
-                                       DependencyGroup group,
-                                       Handle<Code> value);
+                                      DependencyGroup group,
+                                      Handle<Object> object);
+  void UpdateToFinishedCode(DependencyGroup group,
+                            CompilationInfo* info,
+                            Code* code);
+  void RemoveCompilationInfo(DependentCode::DependencyGroup group,
+                             CompilationInfo* info);
+
   void DeoptimizeDependentCodeGroup(Isolate* isolate,
                                     DependentCode::DependencyGroup group);
 
   // The following low-level accessors should only be used by this class
   // and the mark compact collector.
   inline int number_of_entries(DependencyGroup group);
   inline void set_number_of_entries(DependencyGroup group, int value);
+  inline bool is_code_at(int i);
   inline Code* code_at(int i);
-  inline void set_code_at(int i, Code* value);
-  inline Object** code_slot_at(int i);
-  inline void clear_code_at(int i);
+  inline CompilationInfo* compilation_info_at(int i);
+  inline void set_object_at(int i, Object* object);
+  inline Object** slot_at(int i);
+  inline Object* object_at(int i);
+  inline void clear_at(int i);
+  inline void copy(int from, int to);
   static inline DependentCode* cast(Object* object);
 
  private:
   // Make a room at the end of the given group by moving out the first
   // code objects of the subsequent groups.
   inline void ExtendGroup(DependencyGroup group);
   static const int kCodesStartIndex = kGroupCount;
 };
 
 
@@ skipping 488 matching lines @@
     return instance_type() >= FIRST_JS_OBJECT_TYPE;
   }
 
   // Fires when the layout of an object with a leaf map changes.
   // This includes adding transitions to the leaf map or changing
   // the descriptor array.
   inline void NotifyLeafMapLayoutChange();
 
   inline bool CanOmitPrototypeChecks();
 
-  inline void AddDependentCode(DependentCode::DependencyGroup group,
-                               Handle<Code> code);
+  void AddDependentCompilationInfo(DependentCode::DependencyGroup group,
+                                        CompilationInfo* info);
+
+  void AddDependentCode(DependentCode::DependencyGroup group,
+                        Handle<Code> code);
 
   bool IsMapInArrayPrototypeChain();
 
   // Dispatched behavior.
   DECLARE_PRINTER(Map)
   DECLARE_VERIFIER(Map)
 
 #ifdef VERIFY_HEAP
   void SharedMapVerify();
   void VerifyOmittedPrototypeChecks();
@@ skipping 4094 matching lines @@
     } else {
       value &= ~(1 << bit_position);
     }
     return value;
   }
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_H_