[AIX] Bump DWARF versions to 3 because XCOFF64 requires DWARF64

[Jake-Egan]

Summary

DWARF64 was implemented at version 3, so if a DWARF version less than 3 is specified, DWARF64 does not get selected. Since XCOFF64 requires DWARF64, the modified tests fail on 64-bit AIX. This patch bumps these tests to dwarf version 3 to maintain test coverage on 64-bit AIX.

[stevewan]

Dumb question, where is the dwarf version specified?

[shchenz]

In D114110#3147660, @stevewan wrote:

Dumb question, where is the dwarf version specified?

The input ll will specify the DWARF info, see Dwarf Version.

So could we change the input "Dwarf Version" to 3 or above if the version is not a test point to the tests? Keeping these debug tests for AIX should be preferred.

[dblaikie]

Yeah, probably fine to bump the DWARF version instead of exculding these tests from AIX coverage.

[Jake-Egan]

Updated patch to bump dwarf versions instead.

[dblaikie]

Sounds OK!

llvm/test/DebugInfo/Generic/enum-types.ll

 !10 = !{null, !3}
 !11 = !{}
 !12 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, producer: "clang version 3.5.0 (trunk 214102:214133) (llvm/trunk 214102:214132)", isOptimized: false, emissionKind: FullDebug, file: !13, enums: !14, retainedTypes: !14, globals: !11, imports: !11)
 !13 = !DIFile(filename: "b.cpp", directory: "")
 !14 = !{!15}
 !15 = !DICompositeType(tag: DW_TAG_enumeration_type, name: "EA", line: 1, size: 32, align: 32, file: !13, elements: !4, identifier: "_ZTS2EA")
 !17 = distinct !DISubprogram(name: "topB", linkageName: "_Z4topB2EA", line: 5, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, unit: !12, scopeLine: 5, file: !13, scope: !18, type: !9, retainedNodes: !11)
 !18 = !DIFile(filename: "b.cpp", directory: "")
-!19 = !{i32 2, !"Dwarf Version", i32 2}
+!19 = !{i32 2, !"Dwarf Version", i32 3}
 !20 = !{i32 2, !"Debug Info Version", i32 3}
 !21 = !{!"clang version 3.5.0 (trunk 214102:214133) (llvm/trunk 214102:214132)"}
 !22 = !DILocalVariable(name: "sa", line: 5, arg: 1, scope: !7, file: !8, type: !3)
 !23 = !DILocation(line: 5, column: 14, scope: !7)
 !24 = !DILocation(line: 6, column: 1, scope: !7)
 !25 = !DILocalVariable(name: "sa", line: 5, arg: 1, scope: !17, file: !18, type: !3)
 !26 = !DILocation(line: 5, column: 14, scope: !17)
 !27 = !DILocation(line: 6, column: 1, scope: !17)

llvm/test/DebugInfo/Generic/namespace.ll

 !49 = !DIImportedEntity(tag: DW_TAG_imported_declaration, file: !5, line: 34, scope: !21, entity: !50)
 !50 = !DIGlobalVariable(name: "var_decl", linkageName: "_ZN1A1B8var_declE", line: 8, isLocal: false, isDefinition: false, scope: !6, file: !18, type: !13)
 !51 = !DIImportedEntity(tag: DW_TAG_imported_declaration, file: !5, line: 35, scope: !21, entity: !52)
 !52 = !DISubprogram(name: "func_decl", linkageName: "_ZN1A1B9func_declEv", line: 9, isLocal: false, isDefinition: false, flags: DIFlagPrototyped, isOptimized: false, file: !5, scope: !6, type: !19, retainedNodes: !53)
 !53 = !{} ; previously: invalid DW_TAG_base_type
 !54 = !DIImportedEntity(tag: DW_TAG_imported_declaration, file: !5, line: 36, scope: !21, entity: !32)
 !55 = !DIImportedEntity(tag: DW_TAG_imported_declaration, file: !5, line: 37, scope: !21, entity: !26)
 !56 = !DIImportedEntity(tag: DW_TAG_imported_declaration, file: !5, line: 42, scope: !7, entity: !31)
-!57 = !{i32 2, !"Dwarf Version", i32 2}
+!57 = !{i32 2, !"Dwarf Version", i32 3}
 !58 = !{i32 2, !"Debug Info Version", i32 3}
 !59 = !{!"clang version 3.6.0 "}
 !60 = !DILocation(line: 3, column: 12, scope: !10)
 !61 = !DILocalVariable(name: "", line: 4, arg: 1, scope: !14, file: !18, type: !13)
 !62 = !DIExpression()
 !63 = !DILocation(line: 4, column: 12, scope: !14)
 !64 = !DILocation(line: 4, column: 16, scope: !14)
 !65 = !DILocation(line: 20, column: 12, scope: !17)

llvm/test/DebugInfo/Generic/tu-composite.ll

 !26 = !DIDerivedType(tag: DW_TAG_member, name: "values", line: 16, size: 64, align: 64, file: !1, scope: !24, baseType: !27)
 !27 = !DIDerivedType(tag: DW_TAG_pointer_type, size: 64, align: 64, baseType: !18)
 !28 = !{!29}
 !29 = !DITemplateTypeParameter(name: "T", type: !18)
 !31 = distinct !DISubprogram(name: "foo", linkageName: "_ZN1C3fooEv", line: 4, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, unit: !0, scopeLine: 4, file: !1, scope: null, type: !14, declaration: !13, retainedNodes: !2)
 !32 = distinct !DISubprogram(name: "test", linkageName: "_Z4testv", line: 20, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, unit: !0, scopeLine: 20, file: !1, scope: !7, type: !33, retainedNodes: !2)
 !33 = !DISubroutineType(types: !34)
 !34 = !{null}
-!35 = !{i32 2, !"Dwarf Version", i32 2}
+!35 = !{i32 2, !"Dwarf Version", i32 3}
 !36 = !DILocalVariable(name: "this", arg: 1, flags: DIFlagArtificial | DIFlagObjectPointer, scope: !31, type: !37)
 !37 = !DIDerivedType(tag: DW_TAG_pointer_type, size: 64, align: 64, baseType: !4)
 !38 = !DILocation(line: 0, scope: !31)
 !39 = !DILocation(line: 5, scope: !31)
 !40 = !DILocalVariable(name: "B", line: 21, scope: !32, file: !7, type: !41)
 !41 = !DIDerivedType(tag: DW_TAG_typedef, name: "baz", line: 8, file: !1, baseType: !18)
 !42 = !DILocation(line: 21, scope: !32)
 !43 = !DILocalVariable(name: "A", line: 22, scope: !32, file: !7, type: !44)

llvm/test/DebugInfo/Generic/tu-member-pointer.ll

 !2 = !DIFile(filename: "foo.cpp", directory: ".")
 !3 = !DIDerivedType(tag: DW_TAG_ptr_to_member_type, baseType: !4, extraData: !5)
 !4 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
 !5 = !DICompositeType(tag: DW_TAG_structure_type, name: "Foo", file: !2, line: 1, flags: DIFlagFwdDecl, identifier: "_ZTS3Foo")
 !6 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !2, producer: "clang version 3.4", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !7, retainedTypes: !8, globals: !9, imports: !7)
 !7 = !{}
 !8 = !{!5}
 !9 = !{!0}
-!10 = !{i32 2, !"Dwarf Version", i32 2}
+!10 = !{i32 2, !"Dwarf Version", i32 3}
 !11 = !{i32 1, !"Debug Info Version", i32 3}
 

llvm/test/DebugInfo/Generic/varargs.ll

 !7 = !DISubroutineType(types: !8)
 !8 = !{null, !9, !10, null}
 !9 = !DIDerivedType(tag: DW_TAG_pointer_type, size: 64, align: 64, flags: DIFlagArtificial | DIFlagObjectPointer, baseType: !4)
 !10 = !DIBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
 !14 = distinct !DISubprogram(name: "b", linkageName: "_Z1biz", line: 13, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, unit: !0, scopeLine: 13, file: !1, scope: !15, type: !16, retainedNodes: !2)
 !15 = !DIFile(filename: "llvm/tools/clang/test/CodeGenCXX/debug-info-varargs.cpp", directory: "radar/13690847")
 !16 = !DISubroutineType(types: !17)
 !17 = !{null, !10, null}
-!18 = !{i32 2, !"Dwarf Version", i32 2}
+!18 = !{i32 2, !"Dwarf Version", i32 3}
 !19 = !{i32 1, !"Debug Info Version", i32 3}
 !20 = !{!"clang version 3.5 "}
 !21 = !DILocalVariable(name: "c", line: 13, arg: 1, scope: !14, file: !15, type: !10)
 !22 = !DILocation(line: 13, scope: !14)
 !23 = !DILocalVariable(name: "a", line: 16, scope: !14, file: !15, type: !4)
 !24 = !DILocation(line: 16, scope: !14)
 ; Manually modifed to avoid dependence on pointer size
 !25 = !DILocalVariable(name: "fptr", line: 18, scope: !14, file: !15, type: !26)
 !26 = !DIDerivedType(tag: DW_TAG_pointer_type, size: 64, align: 64, baseType: !16)
 !27 = !DILocation(line: 18, scope: !14)
 !28 = !DILocation(line: 22, scope: !14)

llvm/test/Linker/Inputs/type-unique-simple2-a.ll

 !7 = !DIDerivedType(tag: DW_TAG_member, name: "a", line: 2, size: 32, align: 32, file: !5, scope: !4, baseType: !8)
 !8 = !DIBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
 !9 = !DIDerivedType(tag: DW_TAG_member, name: "b", line: 3, size: 64, align: 64, offset: 64, file: !5, scope: !4, baseType: !10)
 !10 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !4)
 !12 = distinct !DISubprogram(name: "f", linkageName: "_Z1fi", line: 3, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, unit: !0, scopeLine: 3, file: !1, scope: !13, type: !14, retainedNodes: !2)
 !13 = !DIFile(filename: "foo.cpp", directory: ".")
 !14 = !DISubroutineType(types: !15)
 !15 = !{null, !8}
-!16 = !{i32 2, !"Dwarf Version", i32 2}
+!16 = !{i32 2, !"Dwarf Version", i32 3}
 !17 = !DILocalVariable(name: "a", line: 3, arg: 1, scope: !12, file: !13, type: !8)
 !18 = !DILocation(line: 3, scope: !12)
 !19 = !DILocalVariable(name: "t", line: 4, scope: !12, file: !13, type: !4)
 !20 = !DILocation(line: 4, scope: !12)
 !21 = !DILocation(line: 5, scope: !12)
 !22 = !{i32 1, !"Debug Info Version", i32 3}

llvm/test/Linker/Inputs/type-unique-simple2-b.ll

 !10 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !4)
 !12 = distinct !DISubprogram(name: "g", linkageName: "_Z1gi", line: 4, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, unit: !0, scopeLine: 4, file: !1, scope: !13, type: !14, retainedNodes: !2)
 !13 = !DIFile(filename: "bar.cpp", directory: ".")
 !14 = !DISubroutineType(types: !15)
 !15 = !{null, !8}
 !16 = distinct !DISubprogram(name: "main", line: 7, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, unit: !0, scopeLine: 7, file: !1, scope: !13, type: !17, retainedNodes: !2)
 !17 = !DISubroutineType(types: !18)
 !18 = !{!8}
-!19 = !{i32 2, !"Dwarf Version", i32 2}
+!19 = !{i32 2, !"Dwarf Version", i32 3}
 !20 = !DILocalVariable(name: "a", line: 4, arg: 1, scope: !12, file: !13, type: !8)
 !21 = !DILocation(line: 4, scope: !12)
 !22 = !DILocalVariable(name: "t", line: 5, scope: !12, file: !13, type: !4)
 !23 = !DILocation(line: 5, scope: !12)
 !24 = !DILocation(line: 6, scope: !12)
 !25 = !DILocation(line: 8, scope: !16)
 !26 = !DILocation(line: 9, scope: !16)
 !27 = !DILocation(line: 10, scope: !16)
 !28 = !{i32 1, !"Debug Info Version", i32 3}

llvm/test/Linker/type-unique-simple-a.ll

 !5 = !DIFile(filename: "./a.hpp", directory: "/Users/mren/c_testing/type_unique_air/simple")
 !6 = !{!7}
 !7 = !DIDerivedType(tag: DW_TAG_member, name: "a", line: 2, size: 32, align: 32, file: !5, scope: !4, baseType: !8)
 !8 = !DIBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
 !10 = distinct !DISubprogram(name: "f", linkageName: "_Z1fi", line: 3, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, unit: !0, scopeLine: 3, file: !1, scope: !11, type: !12, retainedNodes: !2)
 !11 = !DIFile(filename: "foo.cpp", directory: "/Users/mren/c_testing/type_unique_air/simple")
 !12 = !DISubroutineType(types: !13)
 !13 = !{null, !8}
-!14 = !{i32 2, !"Dwarf Version", i32 2}
+!14 = !{i32 2, !"Dwarf Version", i32 3}
 !15 = !DILocalVariable(name: "a", line: 3, arg: 1, scope: !10, file: !11, type: !8)
 !16 = !DILocation(line: 3, scope: !10)
 !17 = !DILocalVariable(name: "t", line: 4, scope: !10, file: !11, type: !4)
 !18 = !DILocation(line: 4, scope: !10)
 !19 = !DILocation(line: 5, scope: !10)
 !20 = !{i32 1, !"Debug Info Version", i32 3}

llvm/test/Linker/type-unique-simple-b.ll

 !8 = !DIBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
 !10 = distinct !DISubprogram(name: "g", linkageName: "_Z1gi", line: 4, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, unit: !0, scopeLine: 4, file: !1, scope: !11, type: !12, retainedNodes: !2)
 !11 = !DIFile(filename: "bar.cpp", directory: "/Users/mren/c_testing/type_unique_air/simple")
 !12 = !DISubroutineType(types: !13)
 !13 = !{null, !8}
 !14 = distinct !DISubprogram(name: "main", line: 7, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, unit: !0, scopeLine: 7, file: !1, scope: !11, type: !15, retainedNodes: !2)
 !15 = !DISubroutineType(types: !16)
 !16 = !{!8}
-!17 = !{i32 2, !"Dwarf Version", i32 2}
+!17 = !{i32 2, !"Dwarf Version", i32 3}
 !18 = !DILocalVariable(name: "a", line: 4, arg: 1, scope: !10, file: !11, type: !8)
 !19 = !DILocation(line: 4, scope: !10)
 !20 = !DILocalVariable(name: "t", line: 5, scope: !10, file: !11, type: !4)
 !21 = !DILocation(line: 5, scope: !10)
 !22 = !DILocation(line: 6, scope: !10)
 !23 = !DILocation(line: 8, scope: !14)
 !24 = !DILocation(line: 9, scope: !14)
 !25 = !DILocation(line: 10, scope: !14)
 !26 = !{i32 1, !"Debug Info Version", i32 3}

llvm/test/Linker/type-unique-simple2-a.ll

 !24 = !DIFile(filename: "a.cpp", directory: "")
 !27 = distinct !DISubprogram(name: "bar", linkageName: "_Z3barv", line: 2, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, unit: !0, scopeLine: 2, file: !24, scope: !28, type: !29, retainedNodes: !2)
 !28 = !DIFile(filename: "a.cpp", directory: "")
 !29 = !DISubroutineType(types: !30)
 !30 = !{!23}
 !31 = distinct !DISubprogram(name: "A", linkageName: "_ZN1AC1Ev", line: 2, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagArtificial | DIFlagPrototyped, isOptimized: false, unit: !0, scopeLine: 2, file: !5, scope: !4, type: !15, declaration: !32, retainedNodes: !2)
 !32 = !DISubprogram(name: "A", isLocal: false, isDefinition: false, virtualIndex: 6, flags: DIFlagArtificial | DIFlagPrototyped, isOptimized: false, scope: !4, type: !15)
 !34 = distinct !DISubprogram(name: "A", linkageName: "_ZN1AC2Ev", line: 2, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagArtificial | DIFlagPrototyped, isOptimized: false, unit: !0, scopeLine: 2, file: !5, scope: !4, type: !15, declaration: !32, retainedNodes: !2)
-!35 = !{i32 2, !"Dwarf Version", i32 2}
+!35 = !{i32 2, !"Dwarf Version", i32 3}
 !36 = !{i32 1, !"Debug Info Version", i32 3}
 !37 = !{!"clang version 3.5 "}
 !38 = !DILocation(line: 3, scope: !27)
 !39 = !DILocalVariable(name: "this", arg: 1, flags: DIFlagArtificial | DIFlagObjectPointer, scope: !31, type: !40)
 !40 = !DIDerivedType(tag: DW_TAG_pointer_type, size: 64, align: 64, baseType: !4)
 !41 = !DILocation(line: 0, scope: !31)
 !42 = !DILocation(line: 2, scope: !43)
 !43 = !DILexicalBlockFile(discriminator: 0, file: !5, scope: !31)
 !44 = !DILocalVariable(name: "this", arg: 1, flags: DIFlagArtificial | DIFlagObjectPointer, scope: !34, type: !40)
 !45 = !DILocation(line: 0, scope: !34)
 !46 = !DILocation(line: 2, scope: !34)

llvm/test/Linker/type-unique-simple2-b.ll

 !19 = !DISubprogram(name: "getFoo", linkageName: "_ZN1A6getFooEv", line: 5, isLocal: false, isDefinition: false, virtuality: DW_VIRTUALITY_virtual, virtualIndex: 6, flags: DIFlagPublic | DIFlagPrototyped, isOptimized: false, scopeLine: 5, file: !5, scope: !4, type: !20, containingType: !4)
 !20 = !DISubroutineType(types: !21)
 !21 = !{!22, !17}
 !22 = !DIDerivedType(tag: DW_TAG_const_type, baseType: !23)
 !23 = !DIDerivedType(tag: DW_TAG_typedef, name: "foo_t", line: 1, file: !5, baseType: !13)
 !26 = distinct !DISubprogram(name: "setFoo", linkageName: "_ZN1A6setFooEv", line: 2, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPublic | DIFlagPrototyped, isOptimized: false, unit: !0, scopeLine: 2, file: !27, scope: !4, type: !15, declaration: !14, retainedNodes: !2)
 !27 = !DIFile(filename: "b.cpp", directory: "")
 !28 = distinct !DISubprogram(name: "getFoo", linkageName: "_ZN1A6getFooEv", line: 4, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPublic | DIFlagPrototyped, isOptimized: false, unit: !0, scopeLine: 4, file: !27, scope: !4, type: !20, declaration: !19, retainedNodes: !2)
-!29 = !{i32 2, !"Dwarf Version", i32 2}
+!29 = !{i32 2, !"Dwarf Version", i32 3}
 !30 = !{i32 1, !"Debug Info Version", i32 3}
 !31 = !{!"clang version 3.5 "}
 !32 = !DILocalVariable(name: "this", arg: 1, flags: DIFlagArtificial | DIFlagObjectPointer, scope: !26, type: !33)
 !33 = !DIDerivedType(tag: DW_TAG_pointer_type, size: 64, align: 64, baseType: !4)
 !34 = !DILocation(line: 0, scope: !26)
 !35 = !DILocation(line: 2, scope: !26)
 !36 = !DILocalVariable(name: "this", arg: 1, flags: DIFlagArtificial | DIFlagObjectPointer, scope: !28, type: !33)
 !37 = !DILocation(line: 0, scope: !28)
 !38 = !DILocation(line: 4, scope: !28)

llvm/test/Linker/type-unique-type-array-a.ll

 !12 = !DIDerivedType(tag: DW_TAG_member, name: "a", line: 2, size: 32, align: 32, file: !1, scope: !10, baseType: !13)
 !13 = !DIBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
 !15 = distinct !DISubprogram(name: "topA", linkageName: "_Z4topAP1A2SA", line: 11, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, unit: !0, scopeLine: 11, file: !1, scope: !16, type: !17, retainedNodes: !2)
 !16 = !DIFile(filename: "a.cpp", directory: "/Users/manmanren/test-Nov/type_unique/rdar_di_array")
 !17 = !DISubroutineType(types: !18)
 !18 = !{null, !19, !10}
 !19 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !4)
 !20 = distinct !DISubprogram(name: "testA", linkageName: "_ZN1A5testAE2SA", line: 7, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, unit: !0, scopeLine: 7, file: !1, scope: !4, type: !7, declaration: !6, retainedNodes: !2)
-!21 = !{i32 2, !"Dwarf Version", i32 2}
+!21 = !{i32 2, !"Dwarf Version", i32 3}
 !22 = !{i32 2, !"Debug Info Version", i32 3}
 !23 = !{!"clang version 3.5.0 (trunk 214102:214113M) (llvm/trunk 214102:214115M)"}
 !24 = !DILocalVariable(name: "a", line: 11, arg: 1, scope: !15, file: !16, type: !19)
 !25 = !DILocation(line: 11, column: 14, scope: !15)
 !26 = !DILocalVariable(name: "sa", line: 11, arg: 2, scope: !15, file: !16, type: !10)
 !27 = !DILocation(line: 11, column: 20, scope: !15)
 !28 = !DILocation(line: 12, column: 3, scope: !15)
 !29 = !DILocation(line: 13, column: 1, scope: !15)
 !30 = !DILocalVariable(name: "this", arg: 1, flags: DIFlagArtificial | DIFlagObjectPointer, scope: !20, type: !19)
 !31 = !DILocation(line: 0, scope: !20)
 !32 = !DILocalVariable(name: "a", line: 7, arg: 2, scope: !20, file: !16, type: !10)
 !33 = !DILocation(line: 7, column: 17, scope: !20)
 !34 = !DILocation(line: 8, column: 3, scope: !20)

llvm/test/Linker/type-unique-type-array-b.ll

 !12 = !DIDerivedType(tag: DW_TAG_member, name: "a", line: 2, size: 32, align: 32, file: !1, scope: !10, baseType: !13)
 !13 = !DIBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
 !15 = distinct !DISubprogram(name: "topB", linkageName: "_Z4topBP1B2SA", line: 11, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, unit: !0, scopeLine: 11, file: !1, scope: !16, type: !17, retainedNodes: !2)
 !16 = !DIFile(filename: "b.cpp", directory: "/Users/manmanren/test-Nov/type_unique/rdar_di_array")
 !17 = !DISubroutineType(types: !18)
 !18 = !{null, !19, !10}
 !19 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !4)
 !20 = distinct !DISubprogram(name: "testB", linkageName: "_ZN1B5testBE2SA", line: 7, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, unit: !0, scopeLine: 7, file: !1, scope: !4, type: !7, declaration: !6, retainedNodes: !2)
-!21 = !{i32 2, !"Dwarf Version", i32 2}
+!21 = !{i32 2, !"Dwarf Version", i32 3}
 !22 = !{i32 2, !"Debug Info Version", i32 3}
 !23 = !{!"clang version 3.5.0 (trunk 214102:214113M) (llvm/trunk 214102:214115M)"}
 !24 = !DILocalVariable(name: "b", line: 11, arg: 1, scope: !15, file: !16, type: !19)
 !25 = !DILocation(line: 11, column: 14, scope: !15)
 !26 = !DILocalVariable(name: "sa", line: 11, arg: 2, scope: !15, file: !16, type: !10)
 !27 = !DILocation(line: 11, column: 20, scope: !15)
 !28 = !DILocation(line: 12, column: 3, scope: !15)
 !29 = !DILocation(line: 13, column: 1, scope: !15)
 !30 = !DILocalVariable(name: "this", arg: 1, flags: DIFlagArtificial | DIFlagObjectPointer, scope: !20, type: !19)
 !31 = !DILocation(line: 0, scope: !20)
 !32 = !DILocalVariable(name: "sa", line: 7, arg: 2, scope: !20, file: !16, type: !10)
 !33 = !DILocation(line: 7, column: 17, scope: !20)
 !34 = !DILocation(line: 8, column: 3, scope: !20)