| ; RUN: llc < %s -filetype=obj | llvm-readobj - -codeview | FileCheck %s |
| ; |
| ; Verify CodeView emission does not emit forward references for unnamed |
| ; structs/unions. If a forward reference is emitted for an unnamed composite |
| ; type then Visual Studio will not be able to display the value. |
| ; |
| ; Previous values displayed by Visual Studio: |
| ; local.unnamed_struct {...} |
| ; local.unnamed_union {...} |
| ; |
| ; New values displayed by Visual Studio: |
| ; local.unnamed_struct {m3=66 'B' } |
| ; local.unnamed_union {m1=65 m2=65 'A' } |
| ; |
| ; The reproducer: |
| ; $ cat unnamed.c |
| ; struct named_struct { |
| ; int id; |
| ; union { |
| ; int m1; |
| ; char m2; |
| ; } unnamed_union; |
| ; struct { |
| ; char m3; |
| ; } unnamed_struct; |
| ; }; |
| ; |
| ; int main() |
| ; { |
| ; struct named_struct local; |
| ; |
| ; local.id = 1; |
| ; local.unnamed_union.m1 = 65; |
| ; local.unnamed_struct.m3 = 'B'; |
| ; |
| ; return 0; |
| ; } |
| ; |
| ; To regenerate the IR below: |
| ; $ clang unnamed.c -S -emit-llvm -g -gcodeview |
| ; |
| ; CHECK: FieldList ([[UnnamedUnionFieldList:.*]]) { |
| ; CHECK-NEXT: TypeLeafKind: LF_FIELDLIST (0x1203) |
| ; CHECK-NEXT: DataMember { |
| ; CHECK-NEXT: TypeLeafKind: LF_MEMBER (0x150D) |
| ; CHECK-NEXT: AccessSpecifier: Public (0x3) |
| ; CHECK-NEXT: Type: int (0x74) |
| ; CHECK-NEXT: FieldOffset: 0x0 |
| ; CHECK-NEXT: Name: m1 |
| ; CHECK-NEXT: } |
| ; CHECK-NEXT: DataMember { |
| ; CHECK-NEXT: TypeLeafKind: LF_MEMBER (0x150D) |
| ; CHECK-NEXT: AccessSpecifier: Public (0x3) |
| ; CHECK-NEXT: Type: char (0x70) |
| ; CHECK-NEXT: FieldOffset: 0x0 |
| ; CHECK-NEXT: Name: m2 |
| ; CHECK-NEXT: } |
| ; CHECK-NEXT: } |
| ; CHECK: Union ([[UnnamedUnion:.*]]) { |
| ; CHECK-NEXT: TypeLeafKind: LF_UNION (0x1506) |
| ; CHECK-NEXT: MemberCount: 2 |
| ; CHECK-NEXT: Properties [ (0x408) |
| ; CHECK-NEXT: Nested (0x8) |
| ; CHECK-NEXT: Sealed (0x400) |
| ; CHECK-NEXT: ] |
| ; CHECK-NEXT: FieldList: <field list> ([[UnnamedUnionFieldList]]) |
| ; CHECK-NEXT: SizeOf: 4 |
| ; CHECK-NEXT: Name: named_struct::<unnamed-tag> |
| ; CHECK-NEXT: } |
| ; CHECK: FieldList ([[UnnamedStructFieldList:.*]]) { |
| ; CHECK-NEXT: TypeLeafKind: LF_FIELDLIST (0x1203) |
| ; CHECK-NEXT: DataMember { |
| ; CHECK-NEXT: TypeLeafKind: LF_MEMBER (0x150D) |
| ; CHECK-NEXT: AccessSpecifier: Public (0x3) |
| ; CHECK-NEXT: Type: char (0x70) |
| ; CHECK-NEXT: FieldOffset: 0x0 |
| ; CHECK-NEXT: Name: m3 |
| ; CHECK-NEXT: } |
| ; CHECK-NEXT: } |
| ; CHECK: Struct ([[UnnamedStruct:.*]]) { |
| ; CHECK-NEXT: TypeLeafKind: LF_STRUCTURE (0x1505) |
| ; CHECK-NEXT: MemberCount: 1 |
| ; CHECK-NEXT: Properties [ (0x8) |
| ; CHECK-NEXT: Nested (0x8) |
| ; CHECK-NEXT: ] |
| ; CHECK-NEXT: FieldList: <field list> ([[UnnamedStructFieldList]]) |
| ; CHECK-NEXT: DerivedFrom: 0x0 |
| ; CHECK-NEXT: VShape: 0x0 |
| ; CHECK-NEXT: SizeOf: 1 |
| ; CHECK-NEXT: Name: named_struct::<unnamed-tag> |
| ; CHECK-NEXT: } |
| ; CHECK: FieldList ([[NamedStructFieldList:.*]]) { |
| ; CHECK-NEXT: TypeLeafKind: LF_FIELDLIST (0x1203) |
| ; CHECK-NEXT: DataMember { |
| ; CHECK-NEXT: TypeLeafKind: LF_MEMBER (0x150D) |
| ; CHECK-NEXT: AccessSpecifier: Public (0x3) |
| ; CHECK-NEXT: Type: int (0x74) |
| ; CHECK-NEXT: FieldOffset: 0x0 |
| ; CHECK-NEXT: Name: id |
| ; CHECK-NEXT: } |
| ; CHECK-NEXT: DataMember { |
| ; CHECK-NEXT: TypeLeafKind: LF_MEMBER (0x150D) |
| ; CHECK-NEXT: AccessSpecifier: Public (0x3) |
| ; CHECK-NEXT: Type: named_struct::<unnamed-tag> ([[UnnamedUnion]]) |
| ; CHECK-NEXT: FieldOffset: 0x4 |
| ; CHECK-NEXT: Name: unnamed_union |
| ; CHECK-NEXT: } |
| ; CHECK-NEXT: DataMember { |
| ; CHECK-NEXT: TypeLeafKind: LF_MEMBER (0x150D) |
| ; CHECK-NEXT: AccessSpecifier: Public (0x3) |
| ; CHECK-NEXT: Type: named_struct::<unnamed-tag> ([[UnnamedStruct]]) |
| ; CHECK-NEXT: FieldOffset: 0x8 |
| ; CHECK-NEXT: Name: unnamed_struct |
| ; CHECK-NEXT: } |
| ; CHECK-NEXT: } |
| ; CHECK: Struct ({{.*}}) { |
| ; CHECK-NEXT: TypeLeafKind: LF_STRUCTURE (0x1505) |
| ; CHECK-NEXT: MemberCount: 3 |
| ; CHECK-NEXT: Properties [ (0x0) |
| ; CHECK-NEXT: ] |
| ; CHECK-NEXT: FieldList: <field list> ([[NamedStructFieldList]]) |
| ; CHECK-NEXT: DerivedFrom: 0x0 |
| ; CHECK-NEXT: VShape: 0x0 |
| ; CHECK-NEXT: SizeOf: 12 |
| ; CHECK-NEXT: Name: named_struct |
| ; CHECK-NEXT: } |
| |
| ; ModuleID = 'unnamed.c' |
| source_filename = "unnamed.c" |
| target datalayout = "e-m:w-i64:64-f80:128-n8:16:32:64-S128" |
| target triple = "x86_64-pc-windows-msvc19.0.24210" |
| |
| %struct.named_struct = type { i32, %union.anon, %struct.anon } |
| %union.anon = type { i32 } |
| %struct.anon = type { i8 } |
| |
| ; Function Attrs: noinline nounwind uwtable |
| define i32 @main() #0 !dbg !7 { |
| entry: |
| %retval = alloca i32, align 4 |
| %local = alloca %struct.named_struct, align 4 |
| store i32 0, i32* %retval, align 4 |
| call void @llvm.dbg.declare(metadata %struct.named_struct* %local, metadata !11, metadata !25), !dbg !26 |
| %id = getelementptr inbounds %struct.named_struct, %struct.named_struct* %local, i32 0, i32 0, !dbg !27 |
| store i32 1, i32* %id, align 4, !dbg !28 |
| %unnamed_union = getelementptr inbounds %struct.named_struct, %struct.named_struct* %local, i32 0, i32 1, !dbg !29 |
| %m1 = bitcast %union.anon* %unnamed_union to i32*, !dbg !30 |
| store i32 65, i32* %m1, align 4, !dbg !31 |
| %unnamed_struct = getelementptr inbounds %struct.named_struct, %struct.named_struct* %local, i32 0, i32 2, !dbg !32 |
| %m3 = getelementptr inbounds %struct.anon, %struct.anon* %unnamed_struct, i32 0, i32 0, !dbg !33 |
| store i8 66, i8* %m3, align 4, !dbg !34 |
| ret i32 0, !dbg !35 |
| } |
| |
| ; Function Attrs: nounwind readnone |
| declare void @llvm.dbg.declare(metadata, metadata, metadata) #1 |
| |
| attributes #0 = { noinline 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" } |
| attributes #1 = { nounwind readnone } |
| |
| !llvm.dbg.cu = !{!0} |
| !llvm.module.flags = !{!3, !4, !5} |
| !llvm.ident = !{!6} |
| |
| !0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 5.0.0 (trunk)", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2) |
| !1 = !DIFile(filename: "unnamed.c", directory: "C:\5Cpath\5Cto\5Cdirectory", checksumkind: CSK_MD5, checksum: "a1874da39665a126d6949d929fbd4818") |
| !2 = !{} |
| !3 = !{i32 2, !"CodeView", i32 1} |
| !4 = !{i32 2, !"Debug Info Version", i32 3} |
| !5 = !{i32 1, !"PIC Level", i32 2} |
| !6 = !{!"clang version 5.0.0 (trunk)"} |
| !7 = distinct !DISubprogram(name: "main", scope: !1, file: !1, line: 12, type: !8, isLocal: false, isDefinition: true, scopeLine: 13, isOptimized: false, unit: !0, retainedNodes: !2) |
| !8 = !DISubroutineType(types: !9) |
| !9 = !{!10} |
| !10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed) |
| !11 = !DILocalVariable(name: "local", scope: !7, file: !1, line: 14, type: !12) |
| !12 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "named_struct", file: !1, line: 1, size: 96, elements: !13) |
| !13 = !{!14, !15, !21} |
| !14 = !DIDerivedType(tag: DW_TAG_member, name: "id", scope: !12, file: !1, line: 2, baseType: !10, size: 32) |
| !15 = !DIDerivedType(tag: DW_TAG_member, name: "unnamed_union", scope: !12, file: !1, line: 6, baseType: !16, size: 32, offset: 32) |
| !16 = distinct !DICompositeType(tag: DW_TAG_union_type, scope: !12, file: !1, line: 3, size: 32, elements: !17) |
| !17 = !{!18, !19} |
| !18 = !DIDerivedType(tag: DW_TAG_member, name: "m1", scope: !16, file: !1, line: 4, baseType: !10, size: 32) |
| !19 = !DIDerivedType(tag: DW_TAG_member, name: "m2", scope: !16, file: !1, line: 5, baseType: !20, size: 8) |
| !20 = !DIBasicType(name: "char", size: 8, encoding: DW_ATE_signed_char) |
| !21 = !DIDerivedType(tag: DW_TAG_member, name: "unnamed_struct", scope: !12, file: !1, line: 9, baseType: !22, size: 8, offset: 64) |
| !22 = distinct !DICompositeType(tag: DW_TAG_structure_type, scope: !12, file: !1, line: 7, size: 8, elements: !23) |
| !23 = !{!24} |
| !24 = !DIDerivedType(tag: DW_TAG_member, name: "m3", scope: !22, file: !1, line: 8, baseType: !20, size: 8) |
| !25 = !DIExpression() |
| !26 = !DILocation(line: 14, column: 23, scope: !7) |
| !27 = !DILocation(line: 16, column: 9, scope: !7) |
| !28 = !DILocation(line: 16, column: 12, scope: !7) |
| !29 = !DILocation(line: 17, column: 9, scope: !7) |
| !30 = !DILocation(line: 17, column: 23, scope: !7) |
| !31 = !DILocation(line: 17, column: 26, scope: !7) |
| !32 = !DILocation(line: 18, column: 9, scope: !7) |
| !33 = !DILocation(line: 18, column: 24, scope: !7) |
| !34 = !DILocation(line: 18, column: 27, scope: !7) |
| !35 = !DILocation(line: 20, column: 3, scope: !7) |
