Index: llvm/trunk/unittests/ADT/SmallVectorTest.cpp
===================================================================
--- llvm/trunk/unittests/ADT/SmallVectorTest.cpp
+++ llvm/trunk/unittests/ADT/SmallVectorTest.cpp
@@ -908,63 +908,69 @@
   EmplaceableArg<3> A3(true);
   {
     SmallVector<Emplaceable, 3> V;
-    V.emplace_back();
+    Emplaceable &back = V.emplace_back();
+    EXPECT_TRUE(&back == &V.back());
     EXPECT_TRUE(V.size() == 1);
-    EXPECT_TRUE(V.back().State == ES_Emplaced);
-    EXPECT_TRUE(V.back().A0.State == EAS_Defaulted);
-    EXPECT_TRUE(V.back().A1.State == EAS_Defaulted);
-    EXPECT_TRUE(V.back().A2.State == EAS_Defaulted);
-    EXPECT_TRUE(V.back().A3.State == EAS_Defaulted);
+    EXPECT_TRUE(back.State == ES_Emplaced);
+    EXPECT_TRUE(back.A0.State == EAS_Defaulted);
+    EXPECT_TRUE(back.A1.State == EAS_Defaulted);
+    EXPECT_TRUE(back.A2.State == EAS_Defaulted);
+    EXPECT_TRUE(back.A3.State == EAS_Defaulted);
   }
   {
     SmallVector<Emplaceable, 3> V;
-    V.emplace_back(std::move(A0));
+    Emplaceable &back = V.emplace_back(std::move(A0));
+    EXPECT_TRUE(&back == &V.back());
     EXPECT_TRUE(V.size() == 1);
-    EXPECT_TRUE(V.back().State == ES_Emplaced);
-    EXPECT_TRUE(V.back().A0.State == EAS_RValue);
-    EXPECT_TRUE(V.back().A1.State == EAS_Defaulted);
-    EXPECT_TRUE(V.back().A2.State == EAS_Defaulted);
-    EXPECT_TRUE(V.back().A3.State == EAS_Defaulted);
+    EXPECT_TRUE(back.State == ES_Emplaced);
+    EXPECT_TRUE(back.A0.State == EAS_RValue);
+    EXPECT_TRUE(back.A1.State == EAS_Defaulted);
+    EXPECT_TRUE(back.A2.State == EAS_Defaulted);
+    EXPECT_TRUE(back.A3.State == EAS_Defaulted);
   }
   {
     SmallVector<Emplaceable, 3> V;
-    V.emplace_back(A0);
+    Emplaceable &back = V.emplace_back(A0);
+    EXPECT_TRUE(&back == &V.back());
     EXPECT_TRUE(V.size() == 1);
-    EXPECT_TRUE(V.back().State == ES_Emplaced);
-    EXPECT_TRUE(V.back().A0.State == EAS_LValue);
-    EXPECT_TRUE(V.back().A1.State == EAS_Defaulted);
-    EXPECT_TRUE(V.back().A2.State == EAS_Defaulted);
-    EXPECT_TRUE(V.back().A3.State == EAS_Defaulted);
+    EXPECT_TRUE(back.State == ES_Emplaced);
+    EXPECT_TRUE(back.A0.State == EAS_LValue);
+    EXPECT_TRUE(back.A1.State == EAS_Defaulted);
+    EXPECT_TRUE(back.A2.State == EAS_Defaulted);
+    EXPECT_TRUE(back.A3.State == EAS_Defaulted);
   }
   {
     SmallVector<Emplaceable, 3> V;
-    V.emplace_back(A0, A1);
+    Emplaceable &back = V.emplace_back(A0, A1);
+    EXPECT_TRUE(&back == &V.back());
     EXPECT_TRUE(V.size() == 1);
-    EXPECT_TRUE(V.back().State == ES_Emplaced);
-    EXPECT_TRUE(V.back().A0.State == EAS_LValue);
-    EXPECT_TRUE(V.back().A1.State == EAS_LValue);
-    EXPECT_TRUE(V.back().A2.State == EAS_Defaulted);
-    EXPECT_TRUE(V.back().A3.State == EAS_Defaulted);
+    EXPECT_TRUE(back.State == ES_Emplaced);
+    EXPECT_TRUE(back.A0.State == EAS_LValue);
+    EXPECT_TRUE(back.A1.State == EAS_LValue);
+    EXPECT_TRUE(back.A2.State == EAS_Defaulted);
+    EXPECT_TRUE(back.A3.State == EAS_Defaulted);
   }
   {
     SmallVector<Emplaceable, 3> V;
-    V.emplace_back(std::move(A0), std::move(A1));
+    Emplaceable &back = V.emplace_back(std::move(A0), std::move(A1));
+    EXPECT_TRUE(&back == &V.back());
     EXPECT_TRUE(V.size() == 1);
-    EXPECT_TRUE(V.back().State == ES_Emplaced);
-    EXPECT_TRUE(V.back().A0.State == EAS_RValue);
-    EXPECT_TRUE(V.back().A1.State == EAS_RValue);
-    EXPECT_TRUE(V.back().A2.State == EAS_Defaulted);
-    EXPECT_TRUE(V.back().A3.State == EAS_Defaulted);
+    EXPECT_TRUE(back.State == ES_Emplaced);
+    EXPECT_TRUE(back.A0.State == EAS_RValue);
+    EXPECT_TRUE(back.A1.State == EAS_RValue);
+    EXPECT_TRUE(back.A2.State == EAS_Defaulted);
+    EXPECT_TRUE(back.A3.State == EAS_Defaulted);
   }
   {
     SmallVector<Emplaceable, 3> V;
-    V.emplace_back(std::move(A0), A1, std::move(A2), A3);
+    Emplaceable &back = V.emplace_back(std::move(A0), A1, std::move(A2), A3);
+    EXPECT_TRUE(&back == &V.back());
     EXPECT_TRUE(V.size() == 1);
-    EXPECT_TRUE(V.back().State == ES_Emplaced);
-    EXPECT_TRUE(V.back().A0.State == EAS_RValue);
-    EXPECT_TRUE(V.back().A1.State == EAS_LValue);
-    EXPECT_TRUE(V.back().A2.State == EAS_RValue);
-    EXPECT_TRUE(V.back().A3.State == EAS_LValue);
+    EXPECT_TRUE(back.State == ES_Emplaced);
+    EXPECT_TRUE(back.A0.State == EAS_RValue);
+    EXPECT_TRUE(back.A1.State == EAS_LValue);
+    EXPECT_TRUE(back.A2.State == EAS_RValue);
+    EXPECT_TRUE(back.A3.State == EAS_LValue);
   }
   {
     SmallVector<int, 1> V;