1 files changed, 14 insertions, 0 deletions
diff --git a/unittests/ADT/DenseMapTest.cpp b/unittests/ADT/DenseMapTest.cpp
index 80f0462bc8fb..273f4da021c4 100644
--- a/unittests/ADT/DenseMapTest.cpp
+++ b/unittests/ADT/DenseMapTest.cpp
@@ -580,4 +580,18 @@ TEST(DenseMapCustomTest, TryEmplaceTest) {
   EXPECT_EQ(Try1.first, Try2.first);
   EXPECT_NE(nullptr, P);
 }
+
+TEST(DenseMapCustomTest, ConstTest) {
+  // Test that const pointers work okay for count and find, even when the
+  // underlying map is a non-const pointer.
+  DenseMap<int *, int> Map;
+  int A;
+  int *B = &A;
+  const int *C = &A;
+  Map.insert({B, 0});
+  EXPECT_EQ(Map.count(B), 1u);
+  EXPECT_EQ(Map.count(C), 1u);
+  EXPECT_NE(Map.find(B), Map.end());
+  EXPECT_NE(Map.find(C), Map.end());
+}
 }