Object pool with support for untagged entries.

runtime/vm/instructions_arm64.h

 // Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 // Classes that describe assembly patterns as used by inline caches.
 
 #ifndef VM_INSTRUCTIONS_ARM64_H_
 #define VM_INSTRUCTIONS_ARM64_H_
 
 #ifndef VM_INSTRUCTIONS_H_
 #error Do not include instructions_arm64.h directly; use instructions.h instead.
 #endif
 
 #include "vm/constants_arm64.h"
 #include "vm/object.h"
 
 namespace dart {
 
 class InstructionPattern : public AllStatic {
  public:
   // Decodes a load sequence ending at 'end' (the last instruction of the
   // load sequence is the instruction before the one at end).  Returns the
   // address of the first instruction in the sequence.  Returns the register
   // being loaded and the loaded object in the output parameters 'reg' and
   // 'obj' respectively.
   static uword DecodeLoadObject(uword end,
-                                const Array& object_pool,
+                                const ObjectPool& object_pool,
                                 Register* reg,
                                 Object* obj);
 
   // Decodes a load sequence ending at 'end' (the last instruction of the
   // load sequence is the instruction before the one at end).  Returns the
   // address of the first instruction in the sequence.  Returns the register
   // being loaded and the loaded immediate value in the output parameters
   // 'reg' and 'value' respectively.
   static uword DecodeLoadWordImmediate(uword end,
                                        Register* reg,
@@ skipping 27 matching lines @@
   uword TargetAddress() const;
   void SetTargetAddress(uword target_address) const;
 
   // This constant length is only valid for inserted call patterns used for
   // lazy deoptimization. Regular call pattern may vary in length.
   static const int kLengthInBytes = 5 * Instr::kInstrSize;
 
   static void InsertAt(uword pc, uword target_address);
 
  private:
-  const Array& object_pool_;
+  const ObjectPool& object_pool_;
 
   uword end_;
   uword args_desc_load_end_;
   uword ic_data_load_end_;
 
   intptr_t target_address_pool_index_;
   Array& args_desc_;
   ICData& ic_data_;
 
   DISALLOW_COPY_AND_ASSIGN(CallPattern);
@@ skipping 34 matching lines @@
 
   bool IsValid() const;
 
  private:
   const uword pc_;
 };
 
 }  // namespace dart
 
 #endif  // VM_INSTRUCTIONS_ARM64_H_