1 files changed, 4 insertions, 1 deletions
diff --git a/llvm/unittests/ADT/IntrusiveRefCntPtrTest.cpp b/llvm/unittests/ADT/IntrusiveRefCntPtrTest.cpp
index 0c8c4ca16dd..a74e05e7b24 100644
--- a/llvm/unittests/ADT/IntrusiveRefCntPtrTest.cpp
+++ b/llvm/unittests/ADT/IntrusiveRefCntPtrTest.cpp
@@ -13,9 +13,12 @@
 namespace llvm {
 
 struct VirtualRefCounted : public RefCountedBaseVPTR {
-  virtual void f() {}
+  virtual void f();
 };
 
+// Provide out-of-line definition to prevent weak vtable.
+void VirtualRefCounted::f() {}
+
 // Run this test with valgrind to detect memory leaks.
 TEST(IntrusiveRefCntPtr, RefCountedBaseVPTRCopyDoesNotLeak) {
   VirtualRefCounted *V1 = new VirtualRefCounted;