1 ; RUN: llc < %s -filetype=obj -o - | llvm-readobj - -codeview | FileCheck %s 2 3 ; C++ source to regenerate: 4 ; $ cat t.cpp 5 ; struct A { int a; }; 6 ; struct B : virtual A { int b; virtual int get() { return b; } }; 7 ; struct C : virtual A { int c; virtual int get() { return c; } }; 8 ; struct D : B, C { 9 ; virtual void f(); // make vbptr not offset zero 10 ; int d; 11 ; }; 12 ; D d; 13 ; $ clang -fno-rtti -g -gcodeview t.cpp -emit-llvm -S -o t.ll -O1 14 15 ; struct B's field list comes first. 16 ; CHECK: FieldList ({{.*}}) { 17 ; CHECK-NEXT: TypeLeafKind: LF_FIELDLIST (0x1203) 18 ; CHECK-NEXT: VirtualBaseClass { 19 ; CHECK-NEXT: TypeLeafKind: LF_VBCLASS (0x1401) 20 ; CHECK-NEXT: AccessSpecifier: Public (0x3) 21 ; CHECK-NEXT: BaseType: A ({{.*}}) 22 ; CHECK-NEXT: VBPtrType: const int* ({{.*}}) 23 ; CHECK-NEXT: VBPtrOffset: 0x8 24 ; CHECK-NEXT: VBTableIndex: 0x1 25 ; CHECK-NEXT: } 26 ; CHECK: } 27 28 ; struct A's field list comes next. 29 ; CHECK: FieldList ({{.*}}) 30 ; CHECK-NEXT: TypeLeafKind: LF_FIELDLIST (0x1203) 31 ; CHECK: } 32 33 ; struct C's field list comes next. 34 ; CHECK: FieldList ({{.*}}) 35 ; CHECK-NEXT: TypeLeafKind: LF_FIELDLIST (0x1203) 36 ; CHECK-NEXT: VirtualBaseClass { 37 ; CHECK-NEXT: TypeLeafKind: LF_VBCLASS (0x1401) 38 ; CHECK-NEXT: AccessSpecifier: Public (0x3) 39 ; CHECK-NEXT: BaseType: A ({{.*}}) 40 ; CHECK-NEXT: VBPtrType: const int* ({{.*}}) 41 ; CHECK-NEXT: VBPtrOffset: 0x8 42 ; CHECK-NEXT: VBTableIndex: 0x1 43 ; CHECK-NEXT: } 44 ; CHECK: } 45 46 ; struct D's field list is last. 47 ; CHECK: FieldList ({{.*}}) { 48 ; CHECK-NEXT: TypeLeafKind: LF_FIELDLIST (0x1203) 49 ; CHECK-NEXT: BaseClass { 50 ; CHECK-NEXT: TypeLeafKind: LF_BCLASS (0x1400) 51 ; CHECK-NEXT: AccessSpecifier: Public (0x3) 52 ; CHECK-NEXT: BaseType: B ({{.*}}) 53 ; CHECK-NEXT: BaseOffset: 0x0 54 ; CHECK-NEXT: } 55 ; CHECK-NEXT: BaseClass { 56 ; CHECK-NEXT: TypeLeafKind: LF_BCLASS (0x1400) 57 ; CHECK-NEXT: AccessSpecifier: Public (0x3) 58 ; CHECK-NEXT: BaseType: C ({{.*}}) 59 ; CHECK-NEXT: BaseOffset: 0x18 60 ; CHECK-NEXT: } 61 ; CHECK-NEXT: IndirectVirtualBaseClass { 62 ; CHECK-NEXT: TypeLeafKind: LF_IVBCLASS (0x1402) 63 ; CHECK-NEXT: AccessSpecifier: Public (0x3) 64 ; CHECK-NEXT: BaseType: A ({{.*}}) 65 ; CHECK-NEXT: VBPtrType: const int* ({{.*}}) 66 ; CHECK-NEXT: VBPtrOffset: 0x8 67 ; CHECK-NEXT: VBTableIndex: 0x1 68 ; CHECK-NEXT: } 69 ; CHECK: } 70 71 ; ModuleID = 't.cpp' 72 source_filename = "t.cpp" 73 target datalayout = "e-m:w-i64:64-f80:128-n8:16:32:64-S128" 74 target triple = "x86_64-pc-windows-msvc19.12.25835" 75 76 %struct.D = type { %struct.B.base, %struct.C.base, i32, [4 x i8], %struct.A } 77 %struct.B.base = type { i32 (...)**, i32*, i32 } 78 %struct.C.base = type { i32 (...)**, i32*, i32 } 79 %struct.A = type { i32 } 80 %struct.B = type { i32 (...)**, i32*, i32, [4 x i8], %struct.A } 81 %struct.C = type { i32 (...)**, i32*, i32, [4 x i8], %struct.A } 82 83 $"?get@B@@UEAAHXZ" = comdat any 84 85 $"?get@C@@UEAAHXZ" = comdat any 86 87 $"??_8D@@7BB@@@" = comdat any 88 89 $"??_8D@@7BC@@@" = comdat any 90 91 $"??_7D@@6BB@@@" = comdat any 92 93 $"??_7D@@6BC@@@" = comdat any 94 95 @"?d@@3UD@@A" = dso_local local_unnamed_addr global %struct.D { %struct.B.base { i32 (...)** bitcast ({ [2 x i8*] }* @"??_7D@@6BB@@@" to i32 (...)**), i32* getelementptr inbounds ([2 x i32], [2 x i32]* @"??_8D@@7BB@@@", i32 0, i32 0), i32 0 }, %struct.C.base { i32 (...)** bitcast ({ [1 x i8*] }* @"??_7D@@6BC@@@" to i32 (...)**), i32* getelementptr inbounds ([2 x i32], [2 x i32]* @"??_8D@@7BC@@@", i32 0, i32 0), i32 0 }, i32 0, [4 x i8] zeroinitializer, %struct.A zeroinitializer }, align 8, !dbg !0 96 @"??_8D@@7BB@@@" = linkonce_odr unnamed_addr constant [2 x i32] [i32 -8, i32 48], comdat 97 @"??_8D@@7BC@@@" = linkonce_odr unnamed_addr constant [2 x i32] [i32 -8, i32 24], comdat 98 @"??_7D@@6BB@@@" = linkonce_odr unnamed_addr constant { [2 x i8*] } { [2 x i8*] [i8* bitcast (i32 (%struct.B*)* @"?get@B@@UEAAHXZ" to i8*), i8* bitcast (void (%struct.D*)* @"?f@D@@UEAAXXZ" to i8*)] }, comdat 99 @"??_7D@@6BC@@@" = linkonce_odr unnamed_addr constant { [1 x i8*] } { [1 x i8*] [i8* bitcast (i32 (%struct.C*)* @"?get@C@@UEAAHXZ" to i8*)] }, comdat 100 @llvm.global_ctors = appending global [0 x { i32, void ()*, i8* }] zeroinitializer 101 102 ; Function Attrs: nounwind uwtable 103 define linkonce_odr dso_local i32 @"?get@B@@UEAAHXZ"(%struct.B* %this) unnamed_addr #0 comdat align 2 !dbg !46 { 104 entry: 105 call void @llvm.dbg.value(metadata %struct.B* %this, metadata !48, metadata !DIExpression()), !dbg !50 106 %b = getelementptr inbounds %struct.B, %struct.B* %this, i64 0, i32 2, !dbg !51 107 %0 = load i32, i32* %b, align 8, !dbg !51, !tbaa !52 108 ret i32 %0, !dbg !51 109 } 110 111 declare dso_local void @"?f@D@@UEAAXXZ"(%struct.D*) unnamed_addr #1 112 113 ; Function Attrs: nounwind uwtable 114 define linkonce_odr dso_local i32 @"?get@C@@UEAAHXZ"(%struct.C* %this) unnamed_addr #0 comdat align 2 !dbg !57 { 115 entry: 116 call void @llvm.dbg.value(metadata %struct.C* %this, metadata !59, metadata !DIExpression()), !dbg !61 117 %c = getelementptr inbounds %struct.C, %struct.C* %this, i64 0, i32 2, !dbg !62 118 %0 = load i32, i32* %c, align 8, !dbg !62, !tbaa !63 119 ret i32 %0, !dbg !62 120 } 121 122 ; Function Attrs: nounwind readnone speculatable 123 declare void @llvm.dbg.value(metadata, metadata, metadata) #2 124 125 attributes #0 = { nounwind uwtable "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-jump-tables"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+fxsr,+mmx,+sse,+sse2,+x87" "unsafe-fp-math"="false" "use-soft-float"="false" } 126 attributes #1 = { "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+fxsr,+mmx,+sse,+sse2,+x87" "unsafe-fp-math"="false" "use-soft-float"="false" } 127 attributes #2 = { nounwind readnone speculatable } 128 129 !llvm.dbg.cu = !{!2} 130 !llvm.module.flags = !{!41, !42, !43, !44} 131 !llvm.ident = !{!45} 132 133 !0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression()) 134 !1 = distinct !DIGlobalVariable(name: "d", linkageName: "?d@@3UD@@A", scope: !2, file: !3, line: 8, type: !6, isLocal: false, isDefinition: true) 135 !2 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !3, producer: "clang version 7.0.0 (trunk)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !4, globals: !5) 136 !3 = !DIFile(filename: "t.cpp", directory: "C:\5CPath\5CTo\5CDirectory", checksumkind: CSK_MD5, checksum: "7477d4db6bf8a461a719bcaab9c6d65e") 137 !4 = !{} 138 !5 = !{!0} 139 !6 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "D", file: !3, line: 4, size: 512, flags: DIFlagTypePassByReference, elements: !7, vtableHolder: !9, identifier: ".?AUD@@") 140 !7 = !{!8, !24, !34, !35, !36, !37} 141 !8 = !DIDerivedType(tag: DW_TAG_inheritance, scope: !6, baseType: !9, extraData: i32 0) 142 !9 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "B", file: !3, line: 2, size: 256, flags: DIFlagTypePassByReference, elements: !10, vtableHolder: !9, identifier: ".?AUB@@") 143 !10 = !{!11, !16, !17, !19, !20} 144 !11 = !DIDerivedType(tag: DW_TAG_inheritance, scope: !9, baseType: !12, offset: 4, flags: DIFlagVirtual, extraData: i32 8) 145 !12 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "A", file: !3, line: 1, size: 32, flags: DIFlagTypePassByValue, elements: !13, identifier: ".?AUA@@") 146 !13 = !{!14} 147 !14 = !DIDerivedType(tag: DW_TAG_member, name: "a", scope: !12, file: !3, line: 1, baseType: !15, size: 32) 148 !15 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed) 149 !16 = !DIDerivedType(tag: DW_TAG_pointer_type, name: "__vtbl_ptr_type", baseType: null, size: 64) 150 !17 = !DIDerivedType(tag: DW_TAG_member, name: "_vptr$B", scope: !3, file: !3, baseType: !18, size: 64, flags: DIFlagArtificial) 151 !18 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !16, size: 64) 152 !19 = !DIDerivedType(tag: DW_TAG_member, name: "b", scope: !9, file: !3, line: 2, baseType: !15, size: 32, offset: 128) 153 !20 = !DISubprogram(name: "get", linkageName: "?get@B@@UEAAHXZ", scope: !9, file: !3, line: 2, type: !21, isLocal: false, isDefinition: false, scopeLine: 2, containingType: !9, virtuality: DW_VIRTUALITY_virtual, virtualIndex: 0, flags: DIFlagPrototyped | DIFlagIntroducedVirtual, isOptimized: true) 154 !21 = !DISubroutineType(types: !22) 155 !22 = !{!15, !23} 156 !23 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !9, size: 64, flags: DIFlagArtificial | DIFlagObjectPointer) 157 !24 = !DIDerivedType(tag: DW_TAG_inheritance, scope: !6, baseType: !25, offset: 192, extraData: i32 0) 158 !25 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "C", file: !3, line: 3, size: 256, flags: DIFlagTypePassByReference, elements: !26, vtableHolder: !25, identifier: ".?AUC@@") 159 !26 = !{!27, !16, !28, !29, !30} 160 !27 = !DIDerivedType(tag: DW_TAG_inheritance, scope: !25, baseType: !12, offset: 4, flags: DIFlagVirtual, extraData: i32 8) 161 !28 = !DIDerivedType(tag: DW_TAG_member, name: "_vptr$C", scope: !3, file: !3, baseType: !18, size: 64, flags: DIFlagArtificial) 162 !29 = !DIDerivedType(tag: DW_TAG_member, name: "c", scope: !25, file: !3, line: 3, baseType: !15, size: 32, offset: 128) 163 !30 = !DISubprogram(name: "get", linkageName: "?get@C@@UEAAHXZ", scope: !25, file: !3, line: 3, type: !31, isLocal: false, isDefinition: false, scopeLine: 3, containingType: !25, virtuality: DW_VIRTUALITY_virtual, virtualIndex: 0, flags: DIFlagPrototyped | DIFlagIntroducedVirtual, isOptimized: true) 164 !31 = !DISubroutineType(types: !32) 165 !32 = !{!15, !33} 166 !33 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !25, size: 64, flags: DIFlagArtificial | DIFlagObjectPointer) 167 !34 = !DIDerivedType(tag: DW_TAG_inheritance, scope: !6, baseType: !12, offset: 4, flags: DIFlagIndirectVirtualBase, extraData: i32 8) 168 !35 = !DIDerivedType(tag: DW_TAG_pointer_type, name: "__vtbl_ptr_type", baseType: null, size: 128) 169 !36 = !DIDerivedType(tag: DW_TAG_member, name: "d", scope: !6, file: !3, line: 6, baseType: !15, size: 32, offset: 384) 170 !37 = !DISubprogram(name: "f", linkageName: "?f@D@@UEAAXXZ", scope: !6, file: !3, line: 5, type: !38, isLocal: false, isDefinition: false, scopeLine: 5, containingType: !6, virtuality: DW_VIRTUALITY_virtual, virtualIndex: 1, flags: DIFlagPrototyped | DIFlagIntroducedVirtual, isOptimized: true) 171 !38 = !DISubroutineType(types: !39) 172 !39 = !{null, !40} 173 !40 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !6, size: 64, flags: DIFlagArtificial | DIFlagObjectPointer) 174 !41 = !{i32 2, !"CodeView", i32 1} 175 !42 = !{i32 2, !"Debug Info Version", i32 3} 176 !43 = !{i32 1, !"wchar_size", i32 2} 177 !44 = !{i32 7, !"PIC Level", i32 2} 178 !45 = !{!"clang version 7.0.0 (trunk)"} 179 !46 = distinct !DISubprogram(name: "get", linkageName: "?get@B@@UEAAHXZ", scope: !9, file: !3, line: 2, type: !21, isLocal: false, isDefinition: true, scopeLine: 2, flags: DIFlagPrototyped, isOptimized: true, unit: !2, declaration: !20, retainedNodes: !47) 180 !47 = !{!48} 181 !48 = !DILocalVariable(name: "this", arg: 1, scope: !46, type: !49, flags: DIFlagArtificial | DIFlagObjectPointer) 182 !49 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !9, size: 64) 183 !50 = !DILocation(line: 0, scope: !46) 184 !51 = !DILocation(line: 2, scope: !46) 185 !52 = !{!53, !54, i64 16} 186 !53 = !{!"?AUB@@", !54, i64 16} 187 !54 = !{!"int", !55, i64 0} 188 !55 = !{!"omnipotent char", !56, i64 0} 189 !56 = !{!"Simple C++ TBAA"} 190 !57 = distinct !DISubprogram(name: "get", linkageName: "?get@C@@UEAAHXZ", scope: !25, file: !3, line: 3, type: !31, isLocal: false, isDefinition: true, scopeLine: 3, flags: DIFlagPrototyped, isOptimized: true, unit: !2, declaration: !30, retainedNodes: !58) 191 !58 = !{!59} 192 !59 = !DILocalVariable(name: "this", arg: 1, scope: !57, type: !60, flags: DIFlagArtificial | DIFlagObjectPointer) 193 !60 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !25, size: 64) 194 !61 = !DILocation(line: 0, scope: !57) 195 !62 = !DILocation(line: 3, scope: !57) 196 !63 = !{!64, !54, i64 16} 197 !64 = !{!"?AUC@@", !54, i64 16} 198
