Support MDNode forward reference.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@75031 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/Feature/mdnode4.ll b/test/Feature/mdnode4.ll
new file mode 100644
index 0000000..c054949
--- /dev/null
+++ b/test/Feature/mdnode4.ll
@@ -0,0 +1,5 @@
+; Test forward MDNode reference
+; RUN: llvm-as < %s | llvm-dis -f -o /dev/null
+
+@llvm.blah = constant metadata !{metadata !1}
+!1 = constant metadata !{i32 23, i32 24}