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