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 44 define 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 54 declare void @llvm.dbg.declare(metadata, metadata, metadata) #1 55 56 attributes #0 = { inlinehint nounwind uwtable } 57 attributes #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
