1; Check that debug info for nested types is generated correctly. 2; With full LTO we may end up in several compilation units sharing 3; single object file. In such case it's possible that nested type DIE 4; is created on behalf of CU#1 and parent type DIE is created on 5; behalf of CU#2. In such case we may end up with broken source line 6; attributes, because file ids don't coincide in CU#1 and CU#2 7 8; Sources used to generate this sample (C++) 9; // File: inc1.h 10; struct S { 11; struct Nested {}; 12; typedef int NestedTypedef; 13; }; 14; 15; // File inc2.h 16; extern int x; 17; int x; 18; 19; // File foo.cpp 20; #include "inc1.h" 21; S s; 22; 23; // File bar.cpp 24; #include "inc1.h" 25; #include "inc2.h" 26; void f3() { 27; S::Nested n; 28; S::NestedTypedef n2; 29; } 30 31; RUN: llc -filetype=obj %s -o %t 32; RUN: llvm-dwarfdump %t | FileCheck %s 33 34; CHECK: DW_AT_name ("Nested") 35; CHECK-NEXT: DW_AT_byte_size (0x01) 36; CHECK-NEXT: DW_AT_decl_file ("{{.*}}inc1.h") 37; CHECK-NEXT: DW_AT_decl_line (2) 38 39; CHECK: DW_AT_name ("NestedTypedef") 40; CHECK-NEXT: DW_AT_decl_file ("{{.*}}inc1.h") 41; CHECK-NEXT: DW_AT_decl_line (3) 42 43source_filename = "llvm-link" 44target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128" 45target triple = "x86_64-unknown-linux-gnu" 46 47%struct.S = type { i8 } 48 49@s = dso_local global %struct.S zeroinitializer, align 1, !dbg !0 50@x = dso_local global i32 0, align 4, !dbg !8 51 52; Function Attrs: noinline nounwind optnone uwtable 53define dso_local void @_Z2f3v() !dbg !19 { 54entry: 55 %n = alloca %struct.S, align 1 56 %n2 = alloca i32, align 4 57 call void @llvm.dbg.declare(metadata ptr %n, metadata !22, metadata !DIExpression()), !dbg !24 58 call void @llvm.dbg.declare(metadata ptr %n2, metadata !25, metadata !DIExpression()), !dbg !27 59 ret void, !dbg !28 60} 61 62; Function Attrs: nounwind readnone speculatable 63declare void @llvm.dbg.declare(metadata, metadata, metadata) 64 65!llvm.dbg.cu = !{!2, !10} 66!llvm.ident = !{!15, !15} 67!llvm.module.flags = !{!16, !17, !18} 68 69!0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression()) 70!1 = distinct !DIGlobalVariable(name: "s", scope: !2, file: !3, line: 2, type: !6, isLocal: false, isDefinition: true) 71!2 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !3, producer: "clang version 9.0.0 (trunk 354767)", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !4, globals: !5, nameTableKind: None) 72!3 = !DIFile(filename: "foo.cpp", directory: "/home/evgeny/work/cpp_lexer/sample3") 73!4 = !{} 74!5 = !{!0} 75!6 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "S", file: !7, line: 1, size: 8, flags: DIFlagTypePassByValue, elements: !4, identifier: "_ZTS1S") 76!7 = !DIFile(filename: "./inc1.h", directory: "/home/evgeny/work/cpp_lexer/sample3") 77!8 = !DIGlobalVariableExpression(var: !9, expr: !DIExpression()) 78!9 = distinct !DIGlobalVariable(name: "x", scope: !10, file: !13, line: 2, type: !14, isLocal: false, isDefinition: true) 79!10 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !11, producer: "clang version 9.0.0 (trunk 354767)", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !4, globals: !12, nameTableKind: None) 80!11 = !DIFile(filename: "bar.cpp", directory: "/home/evgeny/work/cpp_lexer/sample3") 81!12 = !{!8} 82!13 = !DIFile(filename: "./inc2.h", directory: "/home/evgeny/work/cpp_lexer/sample3") 83!14 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed) 84!15 = !{!"clang version 9.0.0 (trunk 354767)"} 85!16 = !{i32 2, !"Dwarf Version", i32 4} 86!17 = !{i32 2, !"Debug Info Version", i32 3} 87!18 = !{i32 1, !"wchar_size", i32 4} 88!19 = distinct !DISubprogram(name: "f3", linkageName: "_Z2f3v", scope: !11, file: !11, line: 3, type: !20, scopeLine: 3, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition, unit: !10, retainedNodes: !4) 89!20 = !DISubroutineType(types: !21) 90!21 = !{null} 91!22 = !DILocalVariable(name: "n", scope: !19, file: !11, line: 4, type: !23) 92!23 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "Nested", scope: !6, file: !7, line: 2, size: 8, flags: DIFlagTypePassByValue, elements: !4, identifier: "_ZTSN1S6NestedE") 93!24 = !DILocation(line: 4, column: 13, scope: !19) 94!25 = !DILocalVariable(name: "n2", scope: !19, file: !11, line: 5, type: !26) 95!26 = !DIDerivedType(tag: DW_TAG_typedef, name: "NestedTypedef", scope: !6, file: !7, line: 3, baseType: !14) 96!27 = !DILocation(line: 5, column: 20, scope: !19) 97!28 = !DILocation(line: 6, column: 1, scope: !19) 98 99