1 files changed, 15 insertions, 0 deletions
diff --git a/llvm/unittests/ADT/STLExtrasTest.cpp b/llvm/unittests/ADT/STLExtrasTest.cpp
index 1e1e9c3d5f0..427d470b61d 100644
--- a/llvm/unittests/ADT/STLExtrasTest.cpp
+++ b/llvm/unittests/ADT/STLExtrasTest.cpp
@@ -415,4 +415,19 @@ TEST(STLExtrasTest, EarlyIncrementTest) {
   EXPECT_EQ(EIR.end(), I);
 }
 
+TEST(STLExtrasTest, splat) {
+  std::vector<int> V;
+  EXPECT_FALSE(is_splat(V));
+
+  V.push_back(1);
+  EXPECT_TRUE(is_splat(V));
+
+  V.push_back(1);
+  V.push_back(1);
+  EXPECT_TRUE(is_splat(V));
+
+  V.push_back(2);
+  EXPECT_FALSE(is_splat(V));
+}
+
 } // namespace