!1 = !DIFile(filename: "<unknown>", directory: "D:\5C")
!2 = !{}
!3 = !{!4}
-!4 = !DISubprogram(name: "f", line: 3, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, scopeLine: 3, file: !5, scope: !6, type: !7, function: void ()* @f, variables: !2)
+!4 = distinct !DISubprogram(name: "f", line: 3, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, scopeLine: 3, file: !5, scope: !6, type: !7, function: void ()* @f, variables: !2)
!5 = !DIFile(filename: "test.c", directory: "D:\5C")
!6 = !DIFile(filename: "test.c", directory: "D:C")
!7 = !DISubroutineType(types: !8)