1; RUN: %llc_dwarf < %s -filetype=obj | llvm-dwarfdump -debug-line - | FileCheck %s 2; RUN: %llc_dwarf < %s -filetype=asm | FileCheck --check-prefix=ASM %s 3 4; If multiple line tables are emitted, one per CU, those line tables can 5; unambiguously rely on the comp_dir of their owning CU and use directory '0' 6; to refer to it. 7 8; CHECK: .debug_line contents: 9; CHECK-NEXT: debug_line[{{.*}}] 10; CHECK-NEXT: Line table prologue: 11; CHECK-NOT: include_directories 12; CHECK: file_names[ 1] 13; CHECK: name: "a.cpp" 14; CHECK-NEXT: dir_index: 0 15; CHECK-NOT: file_names 16 17; CHECK: debug_line[{{.*}}] 18; CHECK-NEXT: Line table prologue: 19; CHECK-NOT: include_directories 20; CHECK: file_names[ 1] 21; CHECK: name: "b.cpp" 22; CHECK-NEXT: dir_index: 0 23; CHECK-NOT: file_names 24 25; However, if a single line table is emitted and shared between CUs, the 26; comp_dir is ambiguous and relying on it would lead to different path 27; interpretations depending on which CU lead to the table - so ensure that 28; full paths are always emitted in this case, never comp_dir relative. 29 30; ASM: .file 1 "/tmp/dbginfo/a" "a.cpp" 31; ASM: .file 2 "/tmp/dbginfo/b" "b.cpp" 32 33; Generated from the following source compiled to bitcode from within their 34; respective directories (with debug info) and linked together with llvm-link 35 36; a/a.cpp 37; void func() { 38; } 39 40; b/b.cpp 41; void func(); 42; int main() { 43; func(); 44; } 45 46; Function Attrs: nounwind uwtable 47define void @_Z4funcv() #0 !dbg !4 { 48entry: 49 ret void, !dbg !19 50} 51 52; Function Attrs: uwtable 53define i32 @main() #1 !dbg !11 { 54entry: 55 call void @_Z4funcv(), !dbg !20 56 ret i32 0, !dbg !21 57} 58 59attributes #0 = { nounwind uwtable "less-precise-fpmad"="false" "frame-pointer"="all" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" } 60attributes #1 = { uwtable "less-precise-fpmad"="false" "frame-pointer"="all" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" } 61 62!llvm.dbg.cu = !{!0, !8} 63!llvm.module.flags = !{!16, !17} 64!llvm.ident = !{!18, !18} 65 66!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, producer: "clang version 3.5.0 ", isOptimized: false, emissionKind: FullDebug, file: !1, enums: !2, retainedTypes: !2, globals: !2, imports: !2) 67!1 = !DIFile(filename: "a.cpp", directory: "/tmp/dbginfo/a") 68!2 = !{} 69!4 = distinct !DISubprogram(name: "func", linkageName: "_Z4funcv", line: 1, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, unit: !0, scopeLine: 1, file: !1, scope: !5, type: !6, retainedNodes: !2) 70!5 = !DIFile(filename: "a.cpp", directory: "/tmp/dbginfo/a") 71!6 = !DISubroutineType(types: !7) 72!7 = !{null} 73!8 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, producer: "clang version 3.5.0 ", isOptimized: false, emissionKind: FullDebug, file: !9, enums: !2, retainedTypes: !2, globals: !2, imports: !2) 74!9 = !DIFile(filename: "b.cpp", directory: "/tmp/dbginfo/b") 75!11 = distinct !DISubprogram(name: "main", line: 2, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, unit: !8, scopeLine: 2, file: !9, scope: !12, type: !13, retainedNodes: !2) 76!12 = !DIFile(filename: "b.cpp", directory: "/tmp/dbginfo/b") 77!13 = !DISubroutineType(types: !14) 78!14 = !{!15} 79!15 = !DIBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed) 80!16 = !{i32 2, !"Dwarf Version", i32 4} 81!17 = !{i32 1, !"Debug Info Version", i32 3} 82!18 = !{!"clang version 3.5.0 "} 83!19 = !DILocation(line: 2, scope: !4) 84!20 = !DILocation(line: 3, scope: !11) 85!21 = !DILocation(line: 4, scope: !11) 86 87