diff --git a/test/TableGen/Tree.td b/test/TableGen/Tree.td
new file mode 100644
index 0000000..f9f1f15
--- /dev/null
+++ b/test/TableGen/Tree.td
@@ -0,0 +1,18 @@
+// This tests to make sure we can parse tree patterns.
+// RUN: tblgen %s
+
+class TreeNode;
+class RegisterClass;
+
+def set  : TreeNode;
+def plus : TreeNode;
+def imm  : TreeNode;
+def R32  : RegisterClass;
+
+class Inst<dag T> {
+  dag Pattern = T;
+}
+
+def ADDrr32 : Inst<(set R32, (plus R32, R32))>;  // a = b + c
+def ADDri32 : Inst<(set R32, (plus R32, imm))>;  // a = b + imm
+