1; RUN: %llc_dwarf -filetype=obj -O0 < %s | llvm-dwarfdump -v -debug-info - | FileCheck %s 2 3; This isn't a very pretty test case - I imagine there might be other ways to 4; tickle the optimizers into producing the desired code, but I haven't found 5; them. 6 7; The issue is when a function is inlined into itself, the inlined argument 8; accidentally overwrote the concrete argument and was lost. 9 10; IR generated from the following source compiled with clang -g: 11; void fn1(void *); 12; void fn2(int, int, int, int); 13; void fn3(); 14; void fn8(); 15; struct C { 16; int b; 17; void m_fn2() { 18; fn8(); 19; if (b) fn2(0, 0, 0, 0); 20; fn3(); 21; } 22; }; 23; C *x; 24; inline void fn7() {} 25; void fn6() { 26; fn8(); 27; x->m_fn2(); 28; fn7(); 29; } 30; void fn3() { fn6(); } 31; void fn4() { x->m_fn2(); } 32; void fn5() { x->m_fn2(); } 33 34; The definition of C and declaration of C::m_fn2 35; CHECK: DW_TAG_structure_type 36; CHECK-NOT: {{DW_TAG|NULL}} 37; CHECK: DW_TAG_member 38; CHECK-NOT: {{DW_TAG|NULL}} 39; CHECK: [[M_FN2_DECL:.*]]: DW_TAG_subprogram 40; CHECK-NOT: DW_TAG 41; CHECK: DW_AT_name {{.*}} "m_fn2" 42; CHECK-NOT: {{DW_TAG|NULL}} 43; CHECK: DW_TAG_formal_parameter 44 45; The abstract definition of C::m_fn2 46; CHECK: [[M_FN2_ABS_DEF:.*]]: DW_TAG_subprogram 47; CHECK-NOT: DW_TAG 48; CHECK: DW_AT_specification {{.*}} {[[M_FN2_DECL]]} 49; CHECK-NOT: DW_TAG 50; CHECK: DW_AT_inline 51; CHECK-NOT: {{DW_TAG|NULL}} 52; CHECK: [[M_FN2_THIS_ABS_DEF:.*]]: DW_TAG_formal_parameter 53; CHECK-NOT: DW_TAG 54; CHECK: DW_AT_name {{.*}} "this" 55 56; Skip some other functions 57; CHECK: DW_TAG_subprogram 58; CHECK: DW_TAG_subprogram 59; CHECK: DW_TAG_subprogram 60 61; The concrete definition of C::m_fn2 62; CHECK: DW_TAG_subprogram 63; CHECK-NOT: DW_TAG 64; CHECK: DW_AT_abstract_origin {{.*}} {[[M_FN2_ABS_DEF]]} 65; CHECK-NOT: {{DW_TAG|NULL}} 66; CHECK: DW_TAG_formal_parameter 67; CHECK-NOT: DW_TAG 68; CHECK: DW_AT_abstract_origin {{.*}} {[[M_FN2_THIS_ABS_DEF]]} 69; CHECK-NOT: {{DW_TAG|NULL}} 70; Inlined fn3: 71; CHECK: DW_TAG_inlined_subroutine 72; CHECK-NOT: {{DW_TAG|NULL}} 73; Inlined fn6: 74; CHECK: DW_TAG_inlined_subroutine 75; CHECK-NOT: {{DW_TAG|NULL}} 76; Inlined C::m_fn2: 77; CHECK: DW_TAG_inlined_subroutine 78; CHECK-NOT: DW_TAG 79; CHECK: DW_AT_abstract_origin {{.*}} {[[M_FN2_ABS_DEF]]} 80; CHECK-NOT: {{DW_TAG|NULL}} 81; CHECK: DW_TAG_formal_parameter 82; CHECK-NOT: DW_TAG 83; CHECK: DW_AT_abstract_origin {{.*}} {[[M_FN2_THIS_ABS_DEF]]} 84 85source_filename = "test/DebugInfo/Generic/recursive_inlining.ll" 86 87%struct.C = type { i32 } 88 89@x = global %struct.C* null, align 8, !dbg !0 90 91; Function Attrs: nounwind 92define void @_Z3fn6v() #0 !dbg !20 { 93entry: 94 tail call void @_Z3fn8v() #3, !dbg !23 95 %0 = load %struct.C*, %struct.C** @x, align 8, !dbg !24, !tbaa !25 96 tail call void @llvm.dbg.value(metadata %struct.C* %0, metadata !29, metadata !32) #3, !dbg !33 97 tail call void @_Z3fn8v() #3, !dbg !34 98 %b.i = getelementptr inbounds %struct.C, %struct.C* %0, i64 0, i32 0, !dbg !35 99 %1 = load i32, i32* %b.i, align 4, !dbg !35, !tbaa !37 100 %tobool.i = icmp eq i32 %1, 0, !dbg !35 101 br i1 %tobool.i, label %_ZN1C5m_fn2Ev.exit, label %if.then.i, !dbg !35 102 103if.then.i: ; preds = %entry 104 tail call void @_Z3fn2iiii(i32 0, i32 0, i32 0, i32 0) #3, !dbg !40 105 br label %_ZN1C5m_fn2Ev.exit, !dbg !40 106 107_ZN1C5m_fn2Ev.exit: ; preds = %if.then.i, %entry 108 tail call void @_Z3fn3v() #3, !dbg !42 109 ret void, !dbg !43 110} 111 112declare void @_Z3fn8v() #1 113 114; Function Attrs: nounwind 115 116define linkonce_odr void @_ZN1C5m_fn2Ev(%struct.C* nocapture readonly %this) #0 align 2 !dbg !30 { 117entry: 118 tail call void @llvm.dbg.value(metadata %struct.C* %this, metadata !29, metadata !32), !dbg !44 119 tail call void @_Z3fn8v() #3, !dbg !45 120 %b = getelementptr inbounds %struct.C, %struct.C* %this, i64 0, i32 0, !dbg !46 121 %0 = load i32, i32* %b, align 4, !dbg !46, !tbaa !37 122 %tobool = icmp eq i32 %0, 0, !dbg !46 123 br i1 %tobool, label %if.end, label %if.then, !dbg !46 124 125if.then: ; preds = %entry 126 tail call void @_Z3fn2iiii(i32 0, i32 0, i32 0, i32 0) #3, !dbg !47 127 br label %if.end, !dbg !47 128 129if.end: ; preds = %if.then, %entry 130 tail call void @_Z3fn8v() #3, !dbg !48 131 %1 = load %struct.C*, %struct.C** @x, align 8, !dbg !52, !tbaa !25 132 tail call void @llvm.dbg.value(metadata %struct.C* %1, metadata !29, metadata !32) #3, !dbg !53 133 tail call void @_Z3fn8v() #3, !dbg !54 134 %b.i.i = getelementptr inbounds %struct.C, %struct.C* %1, i64 0, i32 0, !dbg !55 135 %2 = load i32, i32* %b.i.i, align 4, !dbg !55, !tbaa !37 136 %tobool.i.i = icmp eq i32 %2, 0, !dbg !55 137 br i1 %tobool.i.i, label %_Z3fn6v.exit, label %if.then.i.i, !dbg !55 138 139if.then.i.i: ; preds = %if.end 140 141 tail call void @_Z3fn2iiii(i32 0, i32 0, i32 0, i32 0) #3, !dbg !56 142 br label %_Z3fn6v.exit, !dbg !56 143 144_Z3fn6v.exit: ; preds = %if.then.i.i, %if.end 145 tail call void @_Z3fn3v() #3, !dbg !57 146 ret void, !dbg !58 147} 148 149; Function Attrs: nounwind 150define void @_Z3fn3v() #0 !dbg !50 { 151entry: 152 br label %tailrecurse 153 154tailrecurse: ; preds = %tailrecurse.backedge, %entry 155 tail call void @_Z3fn8v() #3, !dbg !59 156 %0 = load %struct.C*, %struct.C** @x, align 8, !dbg !61, !tbaa !25 157 tail call void @llvm.dbg.value(metadata %struct.C* %0, metadata !29, metadata !32) #3, !dbg !62 158 tail call void @_Z3fn8v() #3, !dbg !63 159 %b.i.i = getelementptr inbounds %struct.C, %struct.C* %0, i64 0, i32 0, !dbg !64 160 %1 = load i32, i32* %b.i.i, align 4, !dbg !64, !tbaa !37 161 %tobool.i.i = icmp eq i32 %1, 0, !dbg !64 162 br i1 %tobool.i.i, label %tailrecurse.backedge, label %if.then.i.i, !dbg !64 163 164tailrecurse.backedge: ; preds = %if.then.i.i, %tailrecurse 165 br label %tailrecurse 166 167if.then.i.i: ; preds = %tailrecurse 168 tail call void @_Z3fn2iiii(i32 0, i32 0, i32 0, i32 0) #3, !dbg !65 169 br label %tailrecurse.backedge, !dbg !65 170} 171 172; Function Attrs: nounwind 173define void @_Z3fn4v() #0 !dbg !66 { 174entry: 175 %0 = load %struct.C*, %struct.C** @x, align 8, !dbg !67, !tbaa !25 176 tail call void @_ZN1C5m_fn2Ev(%struct.C* %0), !dbg !67 177 ret void, !dbg !67 178} 179 180; Function Attrs: nounwind 181define void @_Z3fn5v() #0 !dbg !68 { 182entry: 183 %0 = load %struct.C*, %struct.C** @x, align 8, !dbg !69, !tbaa !25 184 tail call void @_ZN1C5m_fn2Ev(%struct.C* %0), !dbg !69 185 ret void, !dbg !69 186} 187 188declare void @_Z3fn2iiii(i32, i32, i32, i32) #1 189 190; Function Attrs: nounwind readnone 191declare void @llvm.dbg.value(metadata, metadata, metadata) #2 192 193attributes #0 = { nounwind "less-precise-fpmad"="false" "frame-pointer"="none" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "no-realign-stack" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" } 194attributes #1 = { "less-precise-fpmad"="false" "frame-pointer"="none" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "no-realign-stack" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" } 195attributes #2 = { nounwind readnone } 196attributes #3 = { nounwind } 197 198!llvm.dbg.cu = !{!12} 199!llvm.module.flags = !{!17, !18} 200!llvm.ident = !{!19} 201 202!0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression()) 203!1 = !DIGlobalVariable(name: "x", scope: null, file: !2, line: 13, type: !3, isLocal: false, isDefinition: true) 204!2 = !DIFile(filename: "recursive_inlining.cpp", directory: "/usr/local/google/home/blaikie/dev/scratch/missing_concrete_variable_on_darwin/reduce") 205!3 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !4, size: 64, align: 64) 206!4 = !DICompositeType(tag: DW_TAG_structure_type, name: "C", file: !2, line: 5, size: 32, align: 32, elements: !5, identifier: "_ZTS1C") 207!5 = !{!6, !8} 208!6 = !DIDerivedType(tag: DW_TAG_member, name: "b", scope: !4, file: !2, line: 6, baseType: !7, size: 32, align: 32) 209!7 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed) 210!8 = !DISubprogram(name: "m_fn2", linkageName: "_ZN1C5m_fn2Ev", scope: !4, file: !2, line: 7, type: !9, isLocal: false, isDefinition: false, scopeLine: 7, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true) 211!9 = !DISubroutineType(types: !10) 212!10 = !{null, !11} 213!11 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !4, size: 64, align: 64, flags: DIFlagArtificial | DIFlagObjectPointer) 214!12 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !13, producer: "clang version 3.6.0 ", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !14, retainedTypes: !15, globals: !16, imports: !14) 215!13 = !DIFile(filename: "<stdin>", directory: "/usr/local/google/home/blaikie/dev/scratch/missing_concrete_variable_on_darwin/reduce") 216!14 = !{} 217!15 = !{!4} 218!16 = !{!0} 219!17 = !{i32 2, !"Dwarf Version", i32 4} 220!18 = !{i32 2, !"Debug Info Version", i32 3} 221!19 = !{!"clang version 3.6.0 "} 222!20 = distinct !DISubprogram(name: "fn6", linkageName: "_Z3fn6v", scope: !2, file: !2, line: 15, type: !21, isLocal: false, isDefinition: true, scopeLine: 15, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, unit: !12, retainedNodes: !14) 223!21 = !DISubroutineType(types: !22) 224!22 = !{null} 225!23 = !DILocation(line: 16, scope: !20) 226!24 = !DILocation(line: 17, scope: !20) 227!25 = !{!26, !26, i64 0} 228!26 = !{!"any pointer", !27, i64 0} 229!27 = !{!"omnipotent char", !28, i64 0} 230!28 = !{!"Simple C/C++ TBAA"} 231!29 = !DILocalVariable(name: "this", arg: 1, scope: !30, type: !3, flags: DIFlagArtificial | DIFlagObjectPointer) 232!30 = distinct !DISubprogram(name: "m_fn2", linkageName: "_ZN1C5m_fn2Ev", scope: !4, file: !2, line: 7, type: !9, isLocal: false, isDefinition: true, scopeLine: 7, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, unit: !12, declaration: !8, retainedNodes: !31) 233!31 = !{!29} 234!32 = !DIExpression() 235!33 = !DILocation(line: 0, scope: !30, inlinedAt: !24) 236!34 = !DILocation(line: 8, scope: !30, inlinedAt: !24) 237!35 = !DILocation(line: 9, scope: !36, inlinedAt: !24) 238!36 = distinct !DILexicalBlock(scope: !30, file: !2, line: 9) 239!37 = !{!38, !39, i64 0} 240!38 = !{!"struct", !39, i64 0} 241!39 = !{!"int", !27, i64 0} 242!40 = !DILocation(line: 9, scope: !41, inlinedAt: !24) 243!41 = distinct !DILexicalBlock(scope: !36, file: !2, line: 9) 244!42 = !DILocation(line: 10, scope: !30, inlinedAt: !24) 245!43 = !DILocation(line: 19, scope: !20) 246!44 = !DILocation(line: 0, scope: !30) 247!45 = !DILocation(line: 8, scope: !30) 248!46 = !DILocation(line: 9, scope: !36) 249!47 = !DILocation(line: 9, scope: !41) 250!48 = !DILocation(line: 16, scope: !20, inlinedAt: !49) 251!49 = !DILocation(line: 20, scope: !50, inlinedAt: !51) 252!50 = distinct !DISubprogram(name: "fn3", linkageName: "_Z3fn3v", scope: !2, file: !2, line: 20, type: !21, isLocal: false, isDefinition: true, scopeLine: 20, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, unit: !12, retainedNodes: !14) 253!51 = !DILocation(line: 10, scope: !30) 254!52 = !DILocation(line: 17, scope: !20, inlinedAt: !49) 255!53 = !DILocation(line: 0, scope: !30, inlinedAt: !52) 256!54 = !DILocation(line: 8, scope: !30, inlinedAt: !52) 257!55 = !DILocation(line: 9, scope: !36, inlinedAt: !52) 258!56 = !DILocation(line: 9, scope: !41, inlinedAt: !52) 259!57 = !DILocation(line: 10, scope: !30, inlinedAt: !52) 260!58 = !DILocation(line: 11, scope: !30) 261!59 = !DILocation(line: 16, scope: !20, inlinedAt: !60) 262!60 = !DILocation(line: 20, scope: !50) 263!61 = !DILocation(line: 17, scope: !20, inlinedAt: !60) 264!62 = !DILocation(line: 0, scope: !30, inlinedAt: !61) 265!63 = !DILocation(line: 8, scope: !30, inlinedAt: !61) 266!64 = !DILocation(line: 9, scope: !36, inlinedAt: !61) 267!65 = !DILocation(line: 9, scope: !41, inlinedAt: !61) 268!66 = distinct !DISubprogram(name: "fn4", linkageName: "_Z3fn4v", scope: !2, file: !2, line: 21, type: !21, isLocal: false, isDefinition: true, scopeLine: 21, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, unit: !12, retainedNodes: !14) 269!67 = !DILocation(line: 21, scope: !66) 270!68 = distinct !DISubprogram(name: "fn5", linkageName: "_Z3fn5v", scope: !2, file: !2, line: 22, type: !21, isLocal: false, isDefinition: true, scopeLine: 22, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, unit: !12, retainedNodes: !14) 271!69 = !DILocation(line: 22, scope: !68) 272 273