1; REQUIRES: object-emission 2 3; RUN: %llc_dwarf -O0 -filetype=obj < %s | llvm-dwarfdump -debug-dump=info - | FileCheck %s 4 5; Testing that two distinct (distinct by writing them in separate files, while 6; still fulfilling C++'s ODR by having identical token sequences) functions, 7; linked under LTO, get plausible debug info (and don't crash). 8 9; Built from source: 10; $ clang++ a.cpp b.cpp -g -c -emit-llvm 11; $ llvm-link a.bc b.bc -o ab.bc 12 13; This change is intended to tickle a case where the subprogram MDNode 14; associated with the llvm::Function will differ from the subprogram 15; referenced by the DbgLocs in the function. 16 17; $ sed -ie "s/!12, !0/!0, !12/" ab.ll 18; $ cat a.cpp 19; inline int func(int i) { 20; return i * 2; 21; } 22; int (*x)(int) = &func; 23; $ cat b.cpp 24; inline int func(int i) { 25; return i * 2; 26; } 27; int (*y)(int) = &func; 28 29; The DISubprogram should show up in compile unit a. 30; CHECK: DW_TAG_compile_unit 31; CHECK-NOT: DW_TAG 32; CHECK: DW_AT_name {{.*}}"b.cpp" 33; CHECK-NOT: DW_TAG_subprogram 34 35; CHECK: DW_TAG_compile_unit 36; CHECK-NOT: DW_TAG 37; CHECK: DW_AT_name {{.*}}"a.cpp" 38; CHECK: DW_AT_name {{.*}} "func" 39 40@x = global i32 (i32)* @_Z4funci, align 8 41@y = global i32 (i32)* @_Z4funci, align 8 42 43; Function Attrs: inlinehint nounwind uwtable 44define linkonce_odr i32 @_Z4funci(i32 %i) #0 !dbg !4 { 45 %1 = alloca i32, align 4 46 store i32 %i, i32* %1, align 4 47 call void @llvm.dbg.declare(metadata i32* %1, metadata !22, metadata !DIExpression()), !dbg !23 48 %2 = load i32, i32* %1, align 4, !dbg !24 49 %3 = mul nsw i32 %2, 2, !dbg !24 50 ret i32 %3, !dbg !24 51} 52 53; Function Attrs: nounwind readnone 54declare void @llvm.dbg.declare(metadata, metadata, metadata) #1 55 56attributes #0 = { inlinehint nounwind uwtable } 57attributes #1 = { nounwind readnone } 58 59!llvm.dbg.cu = !{!12, !0} 60!llvm.module.flags = !{!19, !20} 61!llvm.ident = !{!21, !21} 62 63!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: !9, imports: !2) 64!1 = !DIFile(filename: "a.cpp", directory: "/tmp/dbginfo") 65!2 = !{} 66!4 = distinct !DISubprogram(name: "func", linkageName: "_Z4funci", line: 1, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, unit: !0, scopeLine: 1, file: !1, scope: !5, type: !6, variables: !2) 67!5 = !DIFile(filename: "a.cpp", directory: "/tmp/dbginfo") 68!6 = !DISubroutineType(types: !7) 69!7 = !{!8, !8} 70!8 = !DIBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed) 71!9 = !{!10} 72!10 = !DIGlobalVariable(name: "x", line: 4, isLocal: false, isDefinition: true, scope: null, file: !5, type: !11, variable: i32 (i32)** @x) 73!11 = !DIDerivedType(tag: DW_TAG_pointer_type, size: 64, align: 64, baseType: !6) 74!12 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, producer: "clang version 3.5.0 ", isOptimized: false, emissionKind: FullDebug, file: !13, enums: !2, retainedTypes: !2, globals: !17, imports: !2) 75!13 = !DIFile(filename: "b.cpp", directory: "/tmp/dbginfo") 76!15 = distinct !DISubprogram(name: "func", linkageName: "_Z4funci", line: 1, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, unit: !12, scopeLine: 1, file: !13, scope: !16, type: !6, variables: !2) 77!16 = !DIFile(filename: "b.cpp", directory: "/tmp/dbginfo") 78!17 = !{!18} 79!18 = !DIGlobalVariable(name: "y", line: 4, isLocal: false, isDefinition: true, scope: null, file: !16, type: !11, variable: i32 (i32)** @y) 80!19 = !{i32 2, !"Dwarf Version", i32 4} 81!20 = !{i32 1, !"Debug Info Version", i32 3} 82!21 = !{!"clang version 3.5.0 "} 83!22 = !DILocalVariable(name: "i", line: 1, arg: 1, scope: !4, file: !5, type: !8) 84!23 = !DILocation(line: 1, scope: !4) 85!24 = !DILocation(line: 2, scope: !4) 86