1 ; REQUIRES: object-emission 2 3 ; RUN: %llc_dwarf -O0 -filetype=obj < %s > %t 4 ; RUN: llvm-dwarfdump -v -debug-info %t | FileCheck %s 5 6 ; Check for a univariant discriminated union -- that is, a variant 7 ; part without a discriminant and with just a single variant. 8 9 ; CHECK: DW_TAG_variant_part 10 ; CHECK-NOT: DW_AT_discr 11 ; CHECK: DW_TAG_variant 12 ; CHECK: DW_TAG_member 13 ; CHECK: DW_AT_type 14 ; CHECK: DW_AT_alignment 15 ; CHECK: DW_AT_data_member_location [DW_FORM_data1] (0x00) 16 17 %F = type { [0 x i8], {}*, [8 x i8] } 18 %"F::Nope" = type {} 19 20 define internal void @_ZN2e34main17h934ff72f9a38d4bbE() unnamed_addr #0 !dbg !5 { 21 start: 22 %qq = alloca %F, align 8 23 call void @llvm.dbg.declare(metadata %F* %qq, metadata !10, metadata !28), !dbg !29 24 %0 = bitcast %F* %qq to {}**, !dbg !29 25 store {}* null, {}** %0, !dbg !29 26 %1 = bitcast %F* %qq to %"F::Nope"*, !dbg !29 27 ret void, !dbg !30 28 } 29 30 ; Function Attrs: nounwind readnone 31 declare void @llvm.dbg.declare(metadata, metadata, metadata) #0 32 33 attributes #0 = { nounwind uwtable } 34 35 !llvm.module.flags = !{!0, !1} 36 !llvm.dbg.cu = !{!2} 37 38 !0 = !{i32 1, !"PIE Level", i32 2} 39 !1 = !{i32 2, !"Debug Info Version", i32 3} 40 !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) 41 !3 = !DIFile(filename: "e3.rs", directory: "/home/tromey/Rust") 42 !4 = !{} 43 !5 = distinct !DISubprogram(name: "main", linkageName: "_ZN2e34mainE", scope: !6, file: !3, line: 2, type: !8, isLocal: true, isDefinition: true, scopeLine: 2, flags: DIFlagPrototyped | DIFlagMainSubprogram, isOptimized: false, unit: !2, templateParams: !4, retainedNodes: !4) 44 !6 = !DINamespace(name: "e3", scope: null) 45 !7 = !DIFile(filename: "<unknown>", directory: "") 46 !8 = !DISubroutineType(types: !9) 47 !9 = !{null} 48 !10 = !DILocalVariable(name: "qq", scope: !11, file: !3, line: 3, type: !12, align: 8) 49 !11 = distinct !DILexicalBlock(scope: !5, file: !3, line: 3, column: 4) 50 !12 = !DICompositeType(tag: DW_TAG_structure_type, name: "F", scope: !6, file: !7, size: 128, align: 64, elements: !13, identifier: "7ce1efff6b82281ab9ceb730566e7e20") 51 !13 = !{!14} 52 !14 = !DICompositeType(tag: DW_TAG_variant_part, name: "", scope: !12, file: !7, size: 128, align: 64, elements: !16, identifier: "7ce1efff6b82281ab9ceb730566e7e20") 53 54 !16 = !{!17} 55 !17 = !DIDerivedType(tag: DW_TAG_member, scope: !14, file: !7, baseType: !18, size: 128, align: 64) 56 !18 = !DICompositeType(tag: DW_TAG_structure_type, name: "Yep", scope: !12, file: !7, size: 128, align: 64, elements: !19, identifier: "7ce1efff6b82281ab9ceb730566e7e20::Yep") 57 !19 = !{!20, !22} 58 !20 = !DIDerivedType(tag: DW_TAG_member, name: "__0", scope: !18, file: !7, baseType: !21, size: 8, align: 8, offset: 64) 59 !21 = !DIBasicType(name: "u8", size: 8, encoding: DW_ATE_unsigned) 60 !22 = !DIDerivedType(tag: DW_TAG_member, name: "__1", scope: !18, file: !7, baseType: !23, size: 64, align: 64) 61 !23 = !DIDerivedType(tag: DW_TAG_pointer_type, name: "&u8", baseType: !21, size: 64, align: 64) 62 63 !28 = !DIExpression() 64 !29 = !DILocation(line: 3, scope: !11) 65 !30 = !DILocation(line: 4, scope: !5) 66
