1; Checks that DW_AT_decl_file attribute is correctly set for 2; template function declaration. When using full LTO we likely 3; end up having multiple CUs in a single DWARF file, and it is 4; possible that we add template function declaration DIE from 5; CU#1 to structure type DIE from CU#2. In such case we should 6; add source line attributes on behalf of CU#2, not CU#1 7 8; Example source code used to generate this sample (C++) 9; // File inc1.h 10; struct S { 11; template <typename T> static void tmpfn() {} 12; }; 13; 14; // File: inc2.h 15; extern int x; 16; int x; 17; 18; // File: foo.cpp 19; #include "inc1.h" 20; S s; 21; 22; // File: bar.cpp 23; #include "inc1.h" 24; #include "inc2.h" 25; void f3() { S::tmpfn<int>(); } 26 27; RUN: llc -filetype=obj %s -o %t 28; RUN: llvm-dwarfdump %t -o - | FileCheck %s 29 30; CHECK: DW_AT_linkage_name ("_ZN1S5tmpfnIiEEvv") 31; CHECK-NEXT: DW_AT_name ("tmpfn<int>") 32; CHECK-NEXT: DW_AT_decl_file ("{{.*}}inc1.h") 33; CHECK-NEXT: DW_AT_decl_line (2) 34 35source_filename = "ld-temp.o" 36target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128" 37target triple = "x86_64-unknown-linux-gnu" 38 39%struct.S = type { i8 } 40 41$_ZN1S5tmpfnIiEEvv = comdat any 42 43@s = dso_local global %struct.S zeroinitializer, align 1, !dbg !0 44@x = dso_local global i32 0, align 4, !dbg !8 45 46; Function Attrs: noinline optnone uwtable 47define dso_local void @_Z2f3v() !dbg !21 { 48 call void @_ZN1S5tmpfnIiEEvv(), !dbg !24 49 ret void, !dbg !25 50} 51 52; Function Attrs: noinline nounwind optnone uwtable 53define weak_odr dso_local void @_ZN1S5tmpfnIiEEvv() comdat align 2 !dbg !26 { 54 ret void, !dbg !30 55} 56 57!llvm.dbg.cu = !{!2, !10} 58!llvm.ident = !{!15, !15} 59!llvm.module.flags = !{!16, !17, !18, !19, !20} 60 61!0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression()) 62!1 = distinct !DIGlobalVariable(name: "s", scope: !2, file: !3, line: 2, type: !6, isLocal: false, isDefinition: true) 63!2 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !3, producer: "clang version 9.0.0 (trunk 354767)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !4, globals: !5, nameTableKind: None) 64!3 = !DIFile(filename: "foo.cpp", directory: "/home/evgeny/work/cpp_lexer/sample2") 65!4 = !{} 66!5 = !{!0} 67!6 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "S", file: !7, line: 1, size: 8, flags: DIFlagTypePassByValue, elements: !4, identifier: "_ZTS1S") 68!7 = !DIFile(filename: "./inc1.h", directory: "/home/evgeny/work/cpp_lexer/sample2") 69!8 = !DIGlobalVariableExpression(var: !9, expr: !DIExpression()) 70!9 = distinct !DIGlobalVariable(name: "x", scope: !10, file: !13, line: 2, type: !14, isLocal: false, isDefinition: true) 71!10 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !11, producer: "clang version 9.0.0 (trunk 354767)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !4, globals: !12, nameTableKind: None) 72!11 = !DIFile(filename: "bar.cpp", directory: "/home/evgeny/work/cpp_lexer/sample2") 73!12 = !{!8} 74!13 = !DIFile(filename: "./inc2.h", directory: "/home/evgeny/work/cpp_lexer/sample2") 75!14 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed) 76!15 = !{!"clang version 9.0.0 (trunk 354767)"} 77!16 = !{i32 2, !"Dwarf Version", i32 4} 78!17 = !{i32 2, !"Debug Info Version", i32 3} 79!18 = !{i32 1, !"wchar_size", i32 4} 80!19 = !{i32 1, !"ThinLTO", i32 0} 81!20 = !{i32 1, !"EnableSplitLTOUnit", i32 0} 82!21 = distinct !DISubprogram(name: "f3", linkageName: "_Z2f3v", scope: !11, file: !11, line: 3, type: !22, scopeLine: 3, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition, unit: !10, retainedNodes: !4) 83!22 = !DISubroutineType(types: !23) 84!23 = !{null} 85!24 = !DILocation(line: 3, column: 13, scope: !21) 86!25 = !DILocation(line: 3, column: 30, scope: !21) 87!26 = distinct !DISubprogram(name: "tmpfn<int>", linkageName: "_ZN1S5tmpfnIiEEvv", scope: !6, file: !7, line: 2, type: !22, scopeLine: 2, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition, unit: !10, templateParams: !28, declaration: !27, retainedNodes: !4) 88!27 = !DISubprogram(name: "tmpfn<int>", linkageName: "_ZN1S5tmpfnIiEEvv", scope: !6, file: !7, line: 2, type: !22, scopeLine: 2, flags: DIFlagPrototyped | DIFlagStaticMember, spFlags: 0, templateParams: !28) 89!28 = !{!29} 90!29 = !DITemplateTypeParameter(name: "T", type: !14) 91!30 = !DILocation(line: 2, column: 46, scope: !26) 92 93