-!0 = !DICompileUnit(language: DW_LANG_C_plus_plus, producer: "clang version 3.5.0 ", isOptimized: false, splitDebugFilename: "tu.dwo", emissionKind: 1, file: !1, enums: !2, retainedTypes: !3, subprograms: !2, globals: !27, imports: !2)
+!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, producer: "clang version 3.5.0 ", isOptimized: false, splitDebugFilename: "tu.dwo", emissionKind: 1, file: !1, enums: !2, retainedTypes: !3, subprograms: !2, globals: !27, imports: !2)