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diff --git a/unittests/ADT/ArrayRefTest.cpp b/unittests/ADT/ArrayRefTest.cpp
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+++ b/unittests/ADT/ArrayRefTest.cpp
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+//===- llvm/unittest/ADT/ArrayRefTest.cpp - ArrayRef unit tests -----------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/ADT/ArrayRef.h"
+#include "llvm/Support/Allocator.h"
+#include "llvm/Support/raw_ostream.h"
+#include "gtest/gtest.h"
+using namespace llvm;
+
+namespace llvm {
+
+TEST(ArrayRefTest, AllocatorCopy) {
+  BumpPtrAllocator Alloc;
+  static const uint16_t Words1[] = { 1, 4, 200, 37 };
+  ArrayRef<uint16_t> Array1 = makeArrayRef(Words1, 4);
+  static const uint16_t Words2[] = { 11, 4003, 67, 64000, 13 };
+  ArrayRef<uint16_t> Array2 = makeArrayRef(Words2, 5);
+  ArrayRef<uint16_t> Array1c = Array1.copy(Alloc);
+  ArrayRef<uint16_t> Array2c = Array2.copy(Alloc);;
+  EXPECT_TRUE(Array1.equals(Array1c));
+  EXPECT_NE(Array1.data(), Array1c.data());
+  EXPECT_TRUE(Array2.equals(Array2c));
+  EXPECT_NE(Array2.data(), Array2c.data());
+}
+
+
+} // end anonymous namespace