VM: Align implementations of assembler constant pools.

runtime/vm/assembler.h

 // Copyright (c) 2012, 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_H_
 #define VM_ASSEMBLER_H_
 
 #include "platform/assert.h"
 #include "vm/allocation.h"
 #include "vm/globals.h"
 #include "vm/growable_array.h"
+#include "vm/hash_map.h"
 #include "vm/object.h"
 
 namespace dart {
 
 #if defined(TARGET_ARCH_ARM) ||                                                \
     defined(TARGET_ARCH_ARM64) ||                                              \
     defined(TARGET_ARCH_MIPS)
 DECLARE_FLAG(bool, use_far_branches);
 #endif
 
@@ skipping 227 matching lines @@
 
   static inline bool IsKeyEqual(Pair kv, Key key) {
     return kv.key_->raw() == key->raw();
   }
 
  private:
   Key key_;
   Value value_;
 };
 
+
+enum Patchability {
+  kPatchable,
+  kNotPatchable,
+};
+
+
+class ObjectPool : public ValueObject {
+ public:
+  ObjectPool() : object_pool_(GrowableObjectArray::Handle()) { }
+
+  intptr_t AddObject(const Object& obj, Patchability patchable);
+  intptr_t AddExternalLabel(const ExternalLabel* label,
+                            Patchability patchable);
+
+  intptr_t FindObject(const Object& obj, Patchability patchable);
+  intptr_t FindExternalLabel(const ExternalLabel* label,
+                             Patchability patchable);
+  const GrowableObjectArray& data() const { return object_pool_; }
+ private:
+  // Objects and jump targets.
+  GrowableObjectArray& object_pool_;
+
+  // Patchability of pool entries.
+  GrowableArray<Patchability> patchable_pool_entries_;
+
+  // Hashmap for fast lookup in object pool.
+  DirectChainedHashMap<ObjIndexPair> object_pool_index_table_;
+};
+
 }  // namespace dart
 
 
 #if defined(TARGET_ARCH_IA32)
 #include "vm/assembler_ia32.h"
 #elif defined(TARGET_ARCH_X64)
 #include "vm/assembler_x64.h"
 #elif defined(TARGET_ARCH_ARM)
 #include "vm/assembler_arm.h"
 #elif defined(TARGET_ARCH_ARM64)
 #include "vm/assembler_arm64.h"
 #elif defined(TARGET_ARCH_MIPS)
 #include "vm/assembler_mips.h"
 #else
 #error Unknown architecture.
 #endif
 
 #endif  // VM_ASSEMBLER_H_