!0 = !DILocation(line: 2, scope: !1)
!1 = !DISubprogram(name: "foo", linkageName: "foo", line: 2, isLocal: false, isDefinition: true, virtualIndex: 6, isOptimized: false, scopeLine: 2, file: !10, scope: null, type: !4, function: i32 ()* @foo)
!2 = !DIFile(filename: "a.c", directory: "/tmp")
-!3 = !DICompileUnit(language: DW_LANG_C89, producer: "4.2.1 (Based on Apple Inc. build 5658) (LLVM build)", isOptimized: false, emissionKind: 0, file: !10, enums: !11, retainedTypes: !11, subprograms: !9, imports: null)
+!3 = distinct !DICompileUnit(language: DW_LANG_C89, producer: "4.2.1 (Based on Apple Inc. build 5658) (LLVM build)", isOptimized: false, emissionKind: 0, file: !10, enums: !11, retainedTypes: !11, subprograms: !9, imports: null)
!4 = !DISubroutineType(types: !5)
!5 = !{!6}
!6 = !DIBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed)