Object pool with support for untagged entries.

runtime/vm/assembler_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.
 
 #ifndef VM_ASSEMBLER_ARM64_H_
 #define VM_ASSEMBLER_ARM64_H_
 
 #ifndef VM_ASSEMBLER_H_
 #error Do not include assembler_arm64.h directly; use assembler.h instead.
 #endif
@@ skipping 458 matching lines @@
 
   // Count the fixups that produce a pointer offset, without processing
   // the fixups.  On ARM64 there are no pointers in code.
   intptr_t CountPointerOffsets() const { return 0; }
 
   const ZoneGrowableArray<intptr_t>& GetPointerOffsets() const {
     ASSERT(buffer_.pointer_offsets().length() == 0);  // No pointers in code.
     return buffer_.pointer_offsets();
   }
 
-  const GrowableObjectArray& object_pool_data() const {
-    return object_pool_.data();
+  ObjectPoolWrapper& object_pool_wrapper() { return object_pool_wrapper_; }
+
+  RawObjectPool* MakeObjectPool() {
+    return object_pool_wrapper_.MakeObjectPool();
   }
 
-  ObjectPool& object_pool() { return object_pool_; }
-
   bool use_far_branches() const {
     return FLAG_use_far_branches || use_far_branches_;
   }
 
   void set_use_far_branches(bool b) {
     ASSERT(buffer_.Size() == 0);
     use_far_branches_ = b;
   }
 
   void FinalizeInstructions(const MemoryRegion& region) {
@@ skipping 916 matching lines @@
   Address ElementAddressForRegIndex(bool is_load,
                                     bool is_external,
                                     intptr_t cid,
                                     intptr_t index_scale,
                                     Register array,
                                     Register index);
 
  private:
   AssemblerBuffer buffer_;  // Contains position independent code.
 
-  // Objects and patchable jump targets.
-  ObjectPool object_pool_;
+  ObjectPoolWrapper object_pool_wrapper_;
 
   int32_t prologue_offset_;
 
   bool use_far_branches_;
 
   class CodeComment : public ZoneAllocated {
    public:
     CodeComment(intptr_t pc_offset, const String& comment)
         : pc_offset_(pc_offset), comment_(comment) { }
 
@@ skipping 503 matching lines @@
                                   Register value,
                                   Label* no_update);
 
   DISALLOW_ALLOCATION();
   DISALLOW_COPY_AND_ASSIGN(Assembler);
 };
 
 }  // namespace dart
 
 #endif  // VM_ASSEMBLER_ARM64_H_