Imported Upstream version 6.10.0.49

Former-commit-id: 1d6753294b2993e1fbf92de9366bb9544db4189b

external/llvm-project/llvm/test/Transforms/GlobalDCE/2002-07-17-ConstantRef.ll

@@ -0,0 +1,13 @@
+; RUN: opt < %s -globaldce
+;
+
+@X = global void ()* @func              ; <void ()**> [#uses=0]
+
+; Not dead, can be reachable via X
+define internal void @func() {
+        ret void
+}
+
+define void @main() {
+        ret void
+}