+// Check the fix for PR4159.
+// http://llvm.org/bugs/show_bug.cgi?id=4159
+// RUN: tblgen -I $srcroot/include --gen-llvmc %s -o %t
+// RUN: grep unique_name %t
+
+include "llvm/CompilerDriver/Common.td"
+
+def OptList : OptionList<[(parameter_option "dummy", (extern))]>;
+
+def dummy_tool : Tool<[
+(cmd_line "dummy_cmd"),
+(in_language "dummy"),
+(out_language "dummy"),
+(actions (case
+ (not_empty "dummy"), (forward_as "dummy", "unique_name")))
+]>;
+
+def DummyGraph : CompilationGraph<[SimpleEdge<"root", "dummy_tool">]>;