1; RUN: %llc_dwarf -O0 -filetype=obj < %s > %t 2; RUN: llvm-dwarfdump -v -debug-info %t | FileCheck %s 3 4; Check for a univariant discriminated union -- that is, a variant 5; part without a discriminant and with just a single variant. 6 7; CHECK: DW_TAG_variant_part 8; CHECK-NOT: DW_AT_discr 9; CHECK: DW_TAG_variant 10; CHECK: DW_TAG_member 11; CHECK: DW_AT_type 12; CHECK: DW_AT_alignment 13; CHECK: DW_AT_data_member_location [DW_FORM_data1] (0x00) 14 15%F = type { [0 x i8], {}*, [8 x i8] } 16%"F::Nope" = type {} 17 18define internal void @_ZN2e34main17h934ff72f9a38d4bbE() unnamed_addr #0 !dbg !5 { 19start: 20 %qq = alloca %F, align 8 21 call void @llvm.dbg.declare(metadata %F* %qq, metadata !10, metadata !28), !dbg !29 22 %0 = bitcast %F* %qq to {}**, !dbg !29 23 store {}* null, {}** %0, !dbg !29 24 %1 = bitcast %F* %qq to %"F::Nope"*, !dbg !29 25 ret void, !dbg !30 26} 27 28; Function Attrs: nounwind readnone 29declare void @llvm.dbg.declare(metadata, metadata, metadata) #0 30 31attributes #0 = { nounwind uwtable } 32 33!llvm.module.flags = !{!0, !1} 34!llvm.dbg.cu = !{!2} 35 36!0 = !{i32 1, !"PIE Level", i32 2} 37!1 = !{i32 2, !"Debug Info Version", i32 3} 38!2 = distinct !DICompileUnit(language: DW_LANG_Rust, file: !3, producer: "clang LLVM (rustc version 1.24.0-dev)", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !4) 39!3 = !DIFile(filename: "e3.rs", directory: "/home/tromey/Rust") 40!4 = !{} 41!5 = distinct !DISubprogram(name: "main", linkageName: "_ZN2e34mainE", scope: !6, file: !3, line: 2, type: !8, scopeLine: 2, flags: DIFlagPrototyped, spFlags: DISPFlagLocalToUnit | DISPFlagDefinition | DISPFlagMainSubprogram, isOptimized: false, unit: !2, templateParams: !4, retainedNodes: !4) 42!6 = !DINamespace(name: "e3", scope: null) 43!7 = !DIFile(filename: "<unknown>", directory: "") 44!8 = !DISubroutineType(types: !9) 45!9 = !{null} 46!10 = !DILocalVariable(name: "qq", scope: !11, file: !3, line: 3, type: !12, align: 8) 47!11 = distinct !DILexicalBlock(scope: !5, file: !3, line: 3, column: 4) 48!12 = !DICompositeType(tag: DW_TAG_structure_type, name: "F", scope: !6, file: !7, size: 128, align: 64, elements: !13, identifier: "7ce1efff6b82281ab9ceb730566e7e20") 49!13 = !{!14} 50!14 = !DICompositeType(tag: DW_TAG_variant_part, name: "", scope: !12, file: !7, size: 128, align: 64, elements: !16, identifier: "7ce1efff6b82281ab9ceb730566e7e20") 51 52!16 = !{!17} 53!17 = !DIDerivedType(tag: DW_TAG_member, scope: !14, file: !7, baseType: !18, size: 128, align: 64) 54!18 = !DICompositeType(tag: DW_TAG_structure_type, name: "Yep", scope: !12, file: !7, size: 128, align: 64, elements: !19, identifier: "7ce1efff6b82281ab9ceb730566e7e20::Yep") 55!19 = !{!20, !22} 56!20 = !DIDerivedType(tag: DW_TAG_member, name: "__0", scope: !18, file: !7, baseType: !21, size: 8, align: 8, offset: 64) 57!21 = !DIBasicType(name: "u8", size: 8, encoding: DW_ATE_unsigned) 58!22 = !DIDerivedType(tag: DW_TAG_member, name: "__1", scope: !18, file: !7, baseType: !23, size: 64, align: 64) 59!23 = !DIDerivedType(tag: DW_TAG_pointer_type, name: "&u8", baseType: !21, size: 64, align: 64) 60 61!28 = !DIExpression() 62!29 = !DILocation(line: 3, scope: !11) 63!30 = !DILocation(line: 4, scope: !5) 64