Add support for object pool

runtime/vm/assembler_mips.h

 // Copyright (c) 2013, 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_MIPS_H_
 #define VM_ASSEMBLER_MIPS_H_
 
 #ifndef VM_ASSEMBLER_H_
 #error Do not include assembler_mips.h directly; use assembler.h instead.
 #endif
@@ skipping 97 matching lines @@
   static void InitOnce() { }
   static bool double_truncate_round_supported() {
     UNIMPLEMENTED();
     return false;
   }
 };
 
 
 class Assembler : public ValueObject {
  public:
-  Assembler() { UNIMPLEMENTED(); }
+  Assembler()
+      : buffer_(),
+        object_pool_(GrowableObjectArray::Handle()),
+        prologue_offset_(-1),
+        comments_() { }
   ~Assembler() { }
 
   void PopRegister(Register r) {
     UNIMPLEMENTED();
   }
 
   void Bind(Label* label) {
     UNIMPLEMENTED();
   }
 
   // Misc. functionality
   int CodeSize() const {
     UNIMPLEMENTED();
     return 0;
   }
   int prologue_offset() const {
     UNIMPLEMENTED();
     return 0;
   }
   const ZoneGrowableArray<int>& GetPointerOffsets() const {
     UNIMPLEMENTED();
     return *pointer_offsets_;
   }
+  const GrowableObjectArray& object_pool() const {
+    UNIMPLEMENTED();
+    return object_pool_;
+  }
   void FinalizeInstructions(const MemoryRegion& region) {
     UNIMPLEMENTED();
   }
 
   // Debugging and bringup support.
   void Stop(const char* message) { UNIMPLEMENTED(); }
   void Unimplemented(const char* message);
   void Untested(const char* message);
   void Unreachable(const char* message);
 
@@ skipping 10 matching lines @@
     return NULL;
   }
 
   static const char* FpuRegisterName(FpuRegister reg) {
     UNIMPLEMENTED();
     return NULL;
   }
 
  private:
   AssemblerBuffer buffer_;
+  GrowableObjectArray& object_pool_;  // Objects and patchable jump targets.
   ZoneGrowableArray<int>* pointer_offsets_;
   int prologue_offset_;
 
   class CodeComment : public ZoneAllocated {
    public:
     CodeComment(intptr_t pc_offset, const String& comment)
         : pc_offset_(pc_offset), comment_(comment) { }
 
     intptr_t pc_offset() const { return pc_offset_; }
     const String& comment() const { return comment_; }
 
    private:
     intptr_t pc_offset_;
     const String& comment_;
 
     DISALLOW_COPY_AND_ASSIGN(CodeComment);
   };
 
   GrowableArray<CodeComment*> comments_;
 
   DISALLOW_ALLOCATION();
   DISALLOW_COPY_AND_ASSIGN(Assembler);
 };
 
 }  // namespace dart
 
 #endif  // VM_ASSEMBLER_MIPS_H_