1; RUN: llc %s -filetype=obj -O0 -mtriple=i386-unknown-linux-gnu -dwarf-version=4 -o %t 2; RUN: llvm-dwarfdump -v %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 and multiple location lists 27; so that we can verify that 28; debug_loc entries are relative to the low_pc of the CU. The loc entry for 29; the byval argument in foo.cpp is in the second CU and so should have 30; an offset relative to that CU rather than from the beginning of the text 31; section. 32 33; Checking that we have two compile units with two sets of high/lo_pc. 34; CHECK: .debug_info contents 35; CHECK: DW_TAG_compile_unit 36; CHECK: DW_AT_low_pc {{.*}} (0x0000000000000020) 37; CHECK: DW_AT_high_pc 38 39; CHECK: DW_TAG_subprogram 40; CHECK-NOT: DW_TAG 41; CHECK: DW_AT_linkage_name [DW_FORM_strp]{{.*}}"_Z3baz1A" 42; CHECK-NOT: {{DW_TAG|NULL}} 43; CHECK: DW_TAG_formal_parameter 44; CHECK-NOT: DW_TAG 45; CHECK: DW_AT_location [DW_FORM_sec_offset] ({{.*}} 46; CHECK-NEXT: [0x00000020, 0x00000037): DW_OP_breg0 EAX+0, DW_OP_deref 47; CHECK-NEXT: [0x00000037, 0x00000063): DW_OP_breg5 EBP-8, DW_OP_deref, DW_OP_deref 48; CHECK-NEXT: DW_AT_name [DW_FORM_strp]{{.*}}"a" 49 50; CHECK: DW_TAG_variable 51; CHECK: DW_AT_location [DW_FORM_exprloc] 52; CHECK-NOT: DW_AT_location 53 54; CHECK: DW_TAG_compile_unit 55; CHECK: DW_AT_low_pc {{.*}} (0x0000000000000000) 56; CHECK: DW_AT_high_pc 57 58; CHECK: DW_TAG_subprogram 59; CHECK-NOT: DW_TAG 60; CHECK: DW_AT_linkage_name [DW_FORM_strp]{{.*}}"_Z3bari" 61; CHECK-NOT: {{DW_TAG|NULL}} 62; CHECK: DW_TAG_formal_parameter 63; CHECK-NOT: DW_TAG 64; CHECK: DW_AT_location [DW_FORM_sec_offset] ({{.*}} 65; CHECK-NEXT: [0x00000000, 0x0000000a): DW_OP_consts +0, DW_OP_stack_value 66; CHECK-NEXT: [0x0000000a, 0x00000017): DW_OP_consts +1, DW_OP_stack_value) 67; CHECK-NEXT: DW_AT_name [DW_FORM_strp]{{.*}}"b" 68 69; CHECK: .debug_loc contents: 70; CHECK: 0x00000000: 71; CHECK-NEXT: [0x00000000, 0x0000000a): DW_OP_consts +0, DW_OP_stack_value 72; CHECK-NEXT: [0x0000000a, 0x00000017): DW_OP_consts +1, DW_OP_stack_value 73; CHECK: 0x00000022: 74; CHECK-NEXT: [0x00000000, 0x00000017): DW_OP_breg0 EAX+0, DW_OP_deref 75; CHECK-NEXT: [0x00000017, 0x00000043): DW_OP_breg5 EBP-8, DW_OP_deref, DW_OP_deref 76 77%struct.A = type { i32 (...)**, i32 } 78 79; Function Attrs: nounwind 80define i32 @_Z3bari(i32 %b) #0 !dbg !4 { 81entry: 82 %b.addr = alloca i32, align 4 83 store i32 %b, i32* %b.addr, align 4 84 call void @llvm.dbg.value(metadata i32 0, metadata !21, metadata !DIExpression()), !dbg !22 85 %0 = load i32, i32* %b.addr, align 4, !dbg !23 86 call void @llvm.dbg.value(metadata i32 1, metadata !21, metadata !DIExpression()), !dbg !22 87 %add = add nsw i32 %0, 4, !dbg !23 88 ret i32 %add, !dbg !23 89} 90 91; Function Attrs: nounwind readnone 92declare void @llvm.dbg.declare(metadata, metadata, metadata) #1 93 94declare void @llvm.dbg.value(metadata, metadata, metadata) #1 95 96define void @_Z3baz1A(%struct.A* %a) #2 !dbg !14 { 97entry: 98 %z = alloca i32, align 4 99 call void @llvm.dbg.declare(metadata %struct.A* %a, metadata !24, metadata !DIExpression(DW_OP_deref)), !dbg !25 100 call void @llvm.dbg.declare(metadata i32* %z, metadata !26, metadata !DIExpression()), !dbg !27 101 store i32 2, i32* %z, align 4, !dbg !27 102 %var = getelementptr inbounds %struct.A, %struct.A* %a, i32 0, i32 1, !dbg !28 103 %0 = load i32, i32* %var, align 4, !dbg !28 104 %cmp = icmp sgt i32 %0, 2, !dbg !28 105 br i1 %cmp, label %if.then, label %if.end, !dbg !28 106 107if.then: ; preds = %entry 108 %1 = load i32, i32* %z, align 4, !dbg !30 109 %inc = add nsw i32 %1, 1, !dbg !30 110 store i32 %inc, i32* %z, align 4, !dbg !30 111 br label %if.end, !dbg !30 112 113if.end: ; preds = %if.then, %entry 114 %call = call signext i8 @_ZN1A3fooEv(%struct.A* %a), !dbg !31 115 %conv = sext i8 %call to i32, !dbg !31 116 %cmp1 = icmp eq i32 %conv, 97, !dbg !31 117 br i1 %cmp1, label %if.then2, label %if.end4, !dbg !31 118 119if.then2: ; preds = %if.end 120 %2 = load i32, i32* %z, align 4, !dbg !33 121 %inc3 = add nsw i32 %2, 1, !dbg !33 122 store i32 %inc3, i32* %z, align 4, !dbg !33 123 br label %if.end4, !dbg !33 124 125if.end4: ; preds = %if.then2, %if.end 126 ret void, !dbg !34 127} 128 129declare signext i8 @_ZN1A3fooEv(%struct.A*) #2 130 131attributes #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" } 132attributes #1 = { nounwind readnone } 133attributes #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" } 134 135!llvm.dbg.cu = !{!0, !9} 136!llvm.module.flags = !{!18, !19} 137!llvm.ident = !{!20, !20} 138 139!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) 140!1 = !DIFile(filename: "debug-loc-offset1.cc", directory: "/llvm_cmake_gcc") 141!2 = !{} 142!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, retainedNodes: !2) 143!5 = !DIFile(filename: "debug-loc-offset1.cc", directory: "/llvm_cmake_gcc") 144!6 = !DISubroutineType(types: !7) 145!7 = !{!8, !8} 146!8 = !DIBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed) 147!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) 148!10 = !DIFile(filename: "debug-loc-offset2.cc", directory: "/llvm_cmake_gcc") 149!11 = !{!12} 150!12 = !DICompositeType(tag: DW_TAG_structure_type, name: "A", line: 1, flags: DIFlagFwdDecl, file: !10, identifier: "_ZTS1A") 151!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, retainedNodes: !2) 152!15 = !DIFile(filename: "debug-loc-offset2.cc", directory: "/llvm_cmake_gcc") 153!16 = !DISubroutineType(types: !17) 154!17 = !{null, !12} 155!18 = !{i32 2, !"Dwarf Version", i32 4} 156!19 = !{i32 2, !"Debug Info Version", i32 3} 157!20 = !{!"clang version 3.5.0 (210479)"} 158!21 = !DILocalVariable(name: "b", line: 1, arg: 1, scope: !4, file: !5, type: !8) 159!22 = !DILocation(line: 1, scope: !4) 160!23 = !DILocation(line: 2, scope: !4) 161!24 = !DILocalVariable(name: "a", line: 6, arg: 1, scope: !14, file: !15, type: !12) 162!25 = !DILocation(line: 6, scope: !14) 163!26 = !DILocalVariable(name: "z", line: 7, scope: !14, file: !15, type: !8) 164!27 = !DILocation(line: 7, scope: !14) 165!28 = !DILocation(line: 8, scope: !29) 166!29 = distinct !DILexicalBlock(line: 8, column: 0, file: !10, scope: !14) 167!30 = !DILocation(line: 9, scope: !29) 168!31 = !DILocation(line: 10, scope: !32) 169!32 = distinct !DILexicalBlock(line: 10, column: 0, file: !10, scope: !14) 170!33 = !DILocation(line: 11, scope: !32) 171!34 = !DILocation(line: 12, scope: !14) 172