1; RUN: llc %s -filetype=obj -O0 -mtriple=i386-unknown-linux-gnu -dwarf-version=4 -o %t 2; RUN: llvm-dwarfdump %t | FileCheck %s 3 4; From the code: 5 6; debug-loc-offset1.cc 7; int bar (int b) { 8; return b+4; 9; } 10 11; debug-loc-offset2.cc 12; struct A { 13; int var; 14; virtual char foo(); 15; }; 16 17; void baz(struct A a) { 18; int z = 2; 19; if (a.var > 2) 20; z++; 21; if (a.foo() == 'a') 22; z++; 23; } 24 25; Compiled separately for i386-pc-linux-gnu and linked together. 26; This ensures that we have multiple compile units so that we can verify that 27; debug_loc entries are relative to the low_pc of the CU. The loc entry for 28; the byval argument in foo.cpp is in the second CU and so should have 29; an offset relative to that CU rather than from the beginning of the text 30; section. 31 32; Checking that we have two compile units with two sets of high/lo_pc. 33; CHECK: .debug_info contents 34; CHECK: DW_TAG_compile_unit 35; CHECK: DW_AT_low_pc 36; CHECK: DW_AT_high_pc 37 38; CHECK: DW_TAG_compile_unit 39; CHECK: DW_AT_low_pc 40; CHECK: DW_AT_high_pc 41 42; CHECK: DW_TAG_subprogram 43; CHECK-NOT: DW_TAG 44; CHECK: DW_AT_linkage_name [DW_FORM_strp]{{.*}}"_Z3baz1A" 45; CHECK-NOT: {{DW_TAG|NULL}} 46; CHECK: DW_TAG_formal_parameter 47; CHECK-NOT: DW_TAG 48; CHECK: DW_AT_location [DW_FORM_sec_offset] (0x00000000) 49; CHECK-NOT: DW_TAG 50; CHECK: DW_AT_name [DW_FORM_strp]{{.*}}"a" 51 52; CHECK: DW_TAG_variable 53; CHECK: DW_AT_location [DW_FORM_exprloc] 54; CHECK-NOT: DW_AT_location 55 56; CHECK: .debug_loc contents: 57; CHECK: 0x00000000: Beginning address offset: 0x0000000000000000 58; CHECK: Ending address offset: 0x0000000000000017 59 60%struct.A = type { i32 (...)**, i32 } 61 62; Function Attrs: nounwind 63define i32 @_Z3bari(i32 %b) #0 !dbg !4 { 64entry: 65 %b.addr = alloca i32, align 4 66 store i32 %b, i32* %b.addr, align 4 67 call void @llvm.dbg.declare(metadata i32* %b.addr, metadata !21, metadata !DIExpression()), !dbg !22 68 %0 = load i32, i32* %b.addr, align 4, !dbg !23 69 %add = add nsw i32 %0, 4, !dbg !23 70 ret i32 %add, !dbg !23 71} 72 73; Function Attrs: nounwind readnone 74declare void @llvm.dbg.declare(metadata, metadata, metadata) #1 75 76define void @_Z3baz1A(%struct.A* %a) #2 !dbg !14 { 77entry: 78 %z = alloca i32, align 4 79 call void @llvm.dbg.declare(metadata %struct.A* %a, metadata !24, metadata !DIExpression(DW_OP_deref)), !dbg !25 80 call void @llvm.dbg.declare(metadata i32* %z, metadata !26, metadata !DIExpression()), !dbg !27 81 store i32 2, i32* %z, align 4, !dbg !27 82 %var = getelementptr inbounds %struct.A, %struct.A* %a, i32 0, i32 1, !dbg !28 83 %0 = load i32, i32* %var, align 4, !dbg !28 84 %cmp = icmp sgt i32 %0, 2, !dbg !28 85 br i1 %cmp, label %if.then, label %if.end, !dbg !28 86 87if.then: ; preds = %entry 88 %1 = load i32, i32* %z, align 4, !dbg !30 89 %inc = add nsw i32 %1, 1, !dbg !30 90 store i32 %inc, i32* %z, align 4, !dbg !30 91 br label %if.end, !dbg !30 92 93if.end: ; preds = %if.then, %entry 94 %call = call signext i8 @_ZN1A3fooEv(%struct.A* %a), !dbg !31 95 %conv = sext i8 %call to i32, !dbg !31 96 %cmp1 = icmp eq i32 %conv, 97, !dbg !31 97 br i1 %cmp1, label %if.then2, label %if.end4, !dbg !31 98 99if.then2: ; preds = %if.end 100 %2 = load i32, i32* %z, align 4, !dbg !33 101 %inc3 = add nsw i32 %2, 1, !dbg !33 102 store i32 %inc3, i32* %z, align 4, !dbg !33 103 br label %if.end4, !dbg !33 104 105if.end4: ; preds = %if.then2, %if.end 106 ret void, !dbg !34 107} 108 109declare signext i8 @_ZN1A3fooEv(%struct.A*) #2 110 111attributes #0 = { nounwind "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" } 112attributes #1 = { nounwind readnone } 113attributes #2 = { "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" } 114 115!llvm.dbg.cu = !{!0, !9} 116!llvm.module.flags = !{!18, !19} 117!llvm.ident = !{!20, !20} 118 119!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, producer: "clang version 3.5.0 (210479)", isOptimized: false, emissionKind: FullDebug, file: !1, enums: !2, retainedTypes: !2, globals: !2, imports: !2) 120!1 = !DIFile(filename: "debug-loc-offset1.cc", directory: "/llvm_cmake_gcc") 121!2 = !{} 122!4 = distinct !DISubprogram(name: "bar", linkageName: "_Z3bari", line: 1, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, unit: !0, scopeLine: 1, file: !1, scope: !5, type: !6, variables: !2) 123!5 = !DIFile(filename: "debug-loc-offset1.cc", directory: "/llvm_cmake_gcc") 124!6 = !DISubroutineType(types: !7) 125!7 = !{!8, !8} 126!8 = !DIBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed) 127!9 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, producer: "clang version 3.5.0 (210479)", isOptimized: false, emissionKind: FullDebug, file: !10, enums: !2, retainedTypes: !11, globals: !2, imports: !2) 128!10 = !DIFile(filename: "debug-loc-offset2.cc", directory: "/llvm_cmake_gcc") 129!11 = !{!12} 130!12 = !DICompositeType(tag: DW_TAG_structure_type, name: "A", line: 1, flags: DIFlagFwdDecl, file: !10, identifier: "_ZTS1A") 131!14 = distinct !DISubprogram(name: "baz", linkageName: "_Z3baz1A", line: 6, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, unit: !9, scopeLine: 6, file: !10, scope: !15, type: !16, variables: !2) 132!15 = !DIFile(filename: "debug-loc-offset2.cc", directory: "/llvm_cmake_gcc") 133!16 = !DISubroutineType(types: !17) 134!17 = !{null, !12} 135!18 = !{i32 2, !"Dwarf Version", i32 4} 136!19 = !{i32 2, !"Debug Info Version", i32 3} 137!20 = !{!"clang version 3.5.0 (210479)"} 138!21 = !DILocalVariable(name: "b", line: 1, arg: 1, scope: !4, file: !5, type: !8) 139!22 = !DILocation(line: 1, scope: !4) 140!23 = !DILocation(line: 2, scope: !4) 141!24 = !DILocalVariable(name: "a", line: 6, arg: 1, scope: !14, file: !15, type: !12) 142!25 = !DILocation(line: 6, scope: !14) 143!26 = !DILocalVariable(name: "z", line: 7, scope: !14, file: !15, type: !8) 144!27 = !DILocation(line: 7, scope: !14) 145!28 = !DILocation(line: 8, scope: !29) 146!29 = distinct !DILexicalBlock(line: 8, column: 0, file: !10, scope: !14) 147!30 = !DILocation(line: 9, scope: !29) 148!31 = !DILocation(line: 10, scope: !32) 149!32 = distinct !DILexicalBlock(line: 10, column: 0, file: !10, scope: !14) 150!33 = !DILocation(line: 11, scope: !32) 151!34 = !DILocation(line: 12, scope: !14) 152