1 files changed, 31 insertions, 0 deletions

diff --git a/unittests/Transforms/Utils/ValueMapperTest.cpp b/unittests/Transforms/Utils/ValueMapperTest.cpp
index 137a2607c848..9dbe4dbc56de 100644
--- a/unittests/Transforms/Utils/ValueMapperTest.cpp
+++ b/unittests/Transforms/Utils/ValueMapperTest.cpp
@@ -24,4 +24,35 @@ TEST(ValueMapperTest, MapMetadataUnresolved) {
   EXPECT_EQ(T.get(), MapMetadata(T.get(), VM, RF_NoModuleLevelChanges));
 }
 
+TEST(ValueMapperTest, MapMetadataDistinct) {
+  LLVMContext Context;
+  auto *D = MDTuple::getDistinct(Context, None);
+
+  {
+    // The node should be cloned.
+    ValueToValueMapTy VM;
+    EXPECT_NE(D, MapMetadata(D, VM, RF_None));
+  }
+  {
+    // The node should be moved.
+    ValueToValueMapTy VM;
+    EXPECT_EQ(D, MapMetadata(D, VM, RF_MoveDistinctMDs));
+  }
+}
+
+TEST(ValueMapperTest, MapMetadataDistinctOperands) {
+  LLVMContext Context;
+  Metadata *Old = MDTuple::getDistinct(Context, None);
+  auto *D = MDTuple::getDistinct(Context, Old);
+  ASSERT_EQ(Old, D->getOperand(0));
+
+  Metadata *New = MDTuple::getDistinct(Context, None);
+  ValueToValueMapTy VM;
+  VM.MD()[Old].reset(New);
+
+  // Make sure operands are updated.
+  EXPECT_EQ(D, MapMetadata(D, VM, RF_MoveDistinctMDs));
+  EXPECT_EQ(New, D->getOperand(0));
+}
+
 }