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+; RUN: llvm-link -o - -S %s | FileCheck %s
+; Crasher for PR22456: MapMetadata() should resolve all cycles.
+
+; CHECK: !named = !{!0}
+!named = !{!0}
+
+; CHECK: !0 = distinct !{!1}
+!0 = distinct !{!1}
+
+; CHECK-NEXT: !1 = !{!2}
+; CHECK-NEXT: !2 = !{!1}
+!1 = !{!2}
+!2 = !{!1}