| ; RUN: llc < %s -filetype=obj | llvm-readobj - -codeview | FileCheck %s |
| |
| ; This test ensures that circular type references through pointer types don't |
| ; cause infinite recursion. It also tests that we always refer to the forward |
| ; declaration type index in field lists and pointer types, which is consistent |
| ; with what MSVC does. It ensures that these records get merged when merging |
| ; streams even if the complete record types differ slightly due to ODR |
| ; violations, i.e. methods that only exist ifndef NDEBUG. |
| |
| ; C++ source to regenerate: |
| ; $ cat t.cpp |
| ; struct B; |
| ; struct A { B *b; }; |
| ; struct B { A a; }; |
| ; void f() { |
| ; A a; |
| ; B b; |
| ; } |
| ; $ clang t.cpp -S -emit-llvm -g -gcodeview -o t.ll |
| |
| ; CHECK: CodeViewTypes [ |
| ; CHECK: Section: .debug$T (6) |
| ; CHECK: Magic: 0x4 |
| ; CHECK: ArgList (0x1000) { |
| ; CHECK: TypeLeafKind: LF_ARGLIST (0x1201) |
| ; CHECK: NumArgs: 0 |
| ; CHECK: Arguments [ |
| ; CHECK: ] |
| ; CHECK: } |
| ; CHECK: Procedure (0x1001) { |
| ; CHECK: TypeLeafKind: LF_PROCEDURE (0x1008) |
| ; CHECK: ReturnType: void (0x3) |
| ; CHECK: CallingConvention: NearC (0x0) |
| ; CHECK: FunctionOptions [ (0x0) |
| ; CHECK: ] |
| ; CHECK: NumParameters: 0 |
| ; CHECK: ArgListType: () (0x1000) |
| ; CHECK: } |
| ; CHECK: FuncId (0x1002) { |
| ; CHECK: TypeLeafKind: LF_FUNC_ID (0x1601) |
| ; CHECK: ParentScope: 0x0 |
| ; CHECK: FunctionType: void () (0x1001) |
| ; CHECK: Name: f |
| ; CHECK: } |
| ; CHECK: Struct (0x1003) { |
| ; CHECK: TypeLeafKind: LF_STRUCTURE (0x1505) |
| ; CHECK: MemberCount: 0 |
| ; CHECK: Properties [ (0x80) |
| ; CHECK: ForwardReference (0x80) |
| ; CHECK: ] |
| ; CHECK: FieldList: 0x0 |
| ; CHECK: DerivedFrom: 0x0 |
| ; CHECK: VShape: 0x0 |
| ; CHECK: SizeOf: 0 |
| ; CHECK: Name: A |
| ; CHECK: } |
| ; CHECK: Struct (0x1004) { |
| ; CHECK: TypeLeafKind: LF_STRUCTURE (0x1505) |
| ; CHECK: MemberCount: 0 |
| ; CHECK: Properties [ (0x80) |
| ; CHECK: ForwardReference (0x80) |
| ; CHECK: ] |
| ; CHECK: FieldList: 0x0 |
| ; CHECK: DerivedFrom: 0x0 |
| ; CHECK: VShape: 0x0 |
| ; CHECK: SizeOf: 0 |
| ; CHECK: Name: B |
| ; CHECK: } |
| ; CHECK: Pointer (0x1005) { |
| ; CHECK: TypeLeafKind: LF_POINTER (0x1002) |
| ; CHECK: PointeeType: B (0x1004) |
| ; CHECK: PointerAttributes: 0x1000C |
| ; CHECK: PtrType: Near64 (0xC) |
| ; CHECK: PtrMode: Pointer (0x0) |
| ; CHECK: IsFlat: 0 |
| ; CHECK: IsConst: 0 |
| ; CHECK: IsVolatile: 0 |
| ; CHECK: IsUnaligned: 0 |
| ; CHECK: } |
| ; CHECK: FieldList (0x1006) { |
| ; CHECK: TypeLeafKind: LF_FIELDLIST (0x1203) |
| ; CHECK: DataMember { |
| ; CHECK: AccessSpecifier: Public (0x3) |
| ; CHECK: Type: B* (0x1005) |
| ; CHECK: FieldOffset: 0x0 |
| ; CHECK: Name: b |
| ; CHECK: } |
| ; CHECK: } |
| ; CHECK: Struct (0x1007) { |
| ; CHECK: TypeLeafKind: LF_STRUCTURE (0x1505) |
| ; CHECK: MemberCount: 1 |
| ; CHECK: Properties [ (0x0) |
| ; CHECK: ] |
| ; CHECK: FieldList: <field list> (0x1006) |
| ; CHECK: DerivedFrom: 0x0 |
| ; CHECK: VShape: 0x0 |
| ; CHECK: SizeOf: 8 |
| ; CHECK: Name: A |
| ; CHECK: } |
| ; CHECK: StringId (0x1008) { |
| ; CHECK: TypeLeafKind: LF_STRING_ID (0x1605) |
| ; CHECK: Id: 0x0 |
| ; CHECK: StringData: D:\src\llvm\build\t.cpp |
| ; CHECK: } |
| ; CHECK: UdtSourceLine (0x1009) { |
| ; CHECK: TypeLeafKind: LF_UDT_SRC_LINE (0x1606) |
| ; CHECK: UDT: A (0x1007) |
| ; CHECK: SourceFile: D:\src\llvm\build\t.cpp (0x1008) |
| ; CHECK: LineNumber: 2 |
| ; CHECK: } |
| ; CHECK: FieldList (0x100A) { |
| ; CHECK: TypeLeafKind: LF_FIELDLIST (0x1203) |
| ; CHECK: DataMember { |
| ; CHECK: AccessSpecifier: Public (0x3) |
| ; CHECK: Type: A (0x1003) |
| ; CHECK: FieldOffset: 0x0 |
| ; CHECK: Name: a |
| ; CHECK: } |
| ; CHECK: } |
| ; CHECK: Struct (0x100B) { |
| ; CHECK: TypeLeafKind: LF_STRUCTURE (0x1505) |
| ; CHECK: MemberCount: 1 |
| ; CHECK: Properties [ (0x0) |
| ; CHECK: ] |
| ; CHECK: FieldList: <field list> (0x100A) |
| ; CHECK: DerivedFrom: 0x0 |
| ; CHECK: VShape: 0x0 |
| ; CHECK: SizeOf: 8 |
| ; CHECK: Name: B |
| ; CHECK: } |
| ; CHECK: UdtSourceLine (0x100C) { |
| ; CHECK: TypeLeafKind: LF_UDT_SRC_LINE (0x1606) |
| ; CHECK: UDT: B (0x100B) |
| ; CHECK: SourceFile: D:\src\llvm\build\t.cpp (0x1008) |
| ; CHECK: LineNumber: 3 |
| ; CHECK: } |
| ; CHECK: ] |
| |
| ; ModuleID = 't.cpp' |
| source_filename = "t.cpp" |
| target datalayout = "e-m:w-i64:64-f80:128-n8:16:32:64-S128" |
| target triple = "x86_64-pc-windows-msvc19.0.23918" |
| |
| %struct.A = type { %struct.B* } |
| %struct.B = type { %struct.A } |
| |
| ; Function Attrs: nounwind uwtable |
| define void @"\01?f@@YAXXZ"() #0 !dbg !7 { |
| entry: |
| %a = alloca %struct.A, align 8 |
| %b = alloca %struct.B, align 8 |
| call void @llvm.dbg.declare(metadata %struct.A* %a, metadata !10, metadata !18), !dbg !19 |
| call void @llvm.dbg.declare(metadata %struct.B* %b, metadata !20, metadata !18), !dbg !21 |
| ret void, !dbg !22 |
| } |
| |
| ; Function Attrs: nounwind readnone |
| declare void @llvm.dbg.declare(metadata, metadata, metadata) #1 |
| |
| attributes #0 = { nounwind uwtable "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" "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_C_plus_plus, file: !1, producer: "clang version 3.9.0 ", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2) |
| !1 = !DIFile(filename: "t.cpp", directory: "D:\5Csrc\5Cllvm\5Cbuild") |
| !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 3.9.0 "} |
| !7 = distinct !DISubprogram(name: "f", linkageName: "\01?f@@YAXXZ", scope: !1, file: !1, line: 4, type: !8, isLocal: false, isDefinition: true, scopeLine: 4, flags: DIFlagPrototyped, isOptimized: false, unit: !0, retainedNodes: !2) |
| !8 = !DISubroutineType(types: !9) |
| !9 = !{null} |
| !10 = !DILocalVariable(name: "a", scope: !7, file: !1, line: 5, type: !11) |
| !11 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "A", file: !1, line: 2, size: 64, align: 64, elements: !12) |
| !12 = !{!13} |
| !13 = !DIDerivedType(tag: DW_TAG_member, name: "b", scope: !11, file: !1, line: 2, baseType: !14, size: 64, align: 64) |
| !14 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !15, size: 64, align: 64) |
| !15 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "B", file: !1, line: 3, size: 64, align: 64, elements: !16) |
| !16 = !{!17} |
| !17 = !DIDerivedType(tag: DW_TAG_member, name: "a", scope: !15, file: !1, line: 3, baseType: !11, size: 64, align: 64) |
| !18 = !DIExpression() |
| !19 = !DILocation(line: 5, column: 5, scope: !7) |
| !20 = !DILocalVariable(name: "b", scope: !7, file: !1, line: 6, type: !15) |
| !21 = !DILocation(line: 6, column: 5, scope: !7) |
| !22 = !DILocation(line: 7, column: 1, scope: !7) |
