Clean up ScopedArenaAllocatorAdapter.

Make the adapter equality-comparable, define aliases for
containers using the adapter and use those aliases.
Fix DebugStackIndirectTopRefImpl assignment.

Change-Id: I689aa8a93d169f63a659dec5040567d7b1343277
diff --git a/compiler/utils/debug_stack.h b/compiler/utils/debug_stack.h
index 2e02b43..1bb0624 100644
--- a/compiler/utils/debug_stack.h
+++ b/compiler/utils/debug_stack.h
@@ -118,7 +118,7 @@
     CheckTop();
   }
   DebugStackIndirectTopRefImpl& operator=(const DebugStackIndirectTopRefImpl& other) {
-    CHECK(ref_ == other->ref_);
+    CHECK(ref_ == other.ref_);
     CheckTop();
     return *this;
   }
diff --git a/compiler/utils/scoped_arena_allocator.h b/compiler/utils/scoped_arena_allocator.h
index d5b003c..c090062 100644
--- a/compiler/utils/scoped_arena_allocator.h
+++ b/compiler/utils/scoped_arena_allocator.h
@@ -235,8 +235,24 @@
 
   template <typename U>
   friend class ScopedArenaAllocatorAdapter;
+
+  template <typename U>
+  friend bool operator==(const ScopedArenaAllocatorAdapter<U>& lhs,
+                         const ScopedArenaAllocatorAdapter<U>& rhs);
 };
 
+template <typename T>
+inline bool operator==(const ScopedArenaAllocatorAdapter<T>& lhs,
+                       const ScopedArenaAllocatorAdapter<T>& rhs) {
+  return lhs.arena_stack_ == rhs.arena_stack_;
+}
+
+template <typename T>
+inline bool operator!=(const ScopedArenaAllocatorAdapter<T>& lhs,
+                       const ScopedArenaAllocatorAdapter<T>& rhs) {
+  return !(lhs == rhs);
+}
+
 inline ScopedArenaAllocatorAdapter<void> ScopedArenaAllocator::Adapter() {
   return ScopedArenaAllocatorAdapter<void>(this);
 }
diff --git a/compiler/utils/scoped_arena_containers.h b/compiler/utils/scoped_arena_containers.h
new file mode 100644
index 0000000..c6fefde
--- /dev/null
+++ b/compiler/utils/scoped_arena_containers.h
@@ -0,0 +1,40 @@
+/*
+ * Copyright (C) 2014 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef ART_COMPILER_UTILS_SCOPED_ARENA_CONTAINERS_H_
+#define ART_COMPILER_UTILS_SCOPED_ARENA_CONTAINERS_H_
+
+#include <vector>
+#include <set>
+
+#include "utils/scoped_arena_allocator.h"
+#include "safe_map.h"
+
+namespace art {
+
+template <typename T>
+using ScopedArenaVector = std::vector<T, ScopedArenaAllocatorAdapter<T> >;
+
+template <typename T, typename Comparator = std::less<T> >
+using ScopedArenaSet = std::set<T, Comparator, ScopedArenaAllocatorAdapter<T> >;
+
+template <typename K, typename V, typename Comparator = std::less<K> >
+using ScopedArenaSafeMap =
+    SafeMap<K, V, Comparator, ScopedArenaAllocatorAdapter<std::pair<const K, V> > >;
+
+}  // namespace art
+
+#endif  // ART_COMPILER_UTILS_SCOPED_ARENA_CONTAINERS_H_