diff --git a/test/Transforms/Mem2Reg/UndefValuesMerge.ll b/test/Transforms/Mem2Reg/UndefValuesMerge.ll
new file mode 100644
index 00000000000..2da7013cd5e
--- /dev/null
+++ b/test/Transforms/Mem2Reg/UndefValuesMerge.ll
@@ -0,0 +1,14 @@
+; RUN: llvm-as < %s | opt -mem2reg | llvm-dis | not grep phi
+
+implementation
+
+int %testfunc(bool %C, int %i, sbyte %j) {
+	%I = alloca int
+	br bool %C, label %T, label %Cont
+T:
+	store int %i, int* %I
+	br label %Cont
+Cont:
+	%Y = load int* %I  ;; %Y = phi %i, undef -> %Y = %i
+	ret int %Y
+}