1; RUN: %llc_dwarf -filetype=obj -O0 < %s | llvm-dwarfdump -debug-info - | FileCheck %s 2; RUN: %llc_dwarf --try-experimental-debuginfo-iterators -filetype=obj -O0 < %s | llvm-dwarfdump -debug-info - | FileCheck %s 3 4; This isn't a very pretty test case - I imagine there might be other ways to 5; tickle the optimizers into producing the desired code, but I haven't found 6; them. 7 8; The issue is when a function is inlined into itself, the inlined argument 9; accidentally overwrote the concrete argument and was lost. 10 11; IR generated from the following source compiled with clang -g: 12; void fn1(ptr); 13; void fn2(int, int, int, int); 14; void fn3(); 15; void fn8(); 16; struct C { 17; int b; 18; void m_fn2() { 19; fn8(); 20; if (b) fn2(0, 0, 0, 0); 21; fn3(); 22; } 23; }; 24; C *x; 25; inline void fn7() {} 26; void fn6() { 27; fn8(); 28; x->m_fn2(); 29; fn7(); 30; } 31; void fn3() { fn6(); } 32; void fn4() { x->m_fn2(); } 33; void fn5() { x->m_fn2(); } 34 35; The definition of C and declaration of C::m_fn2 36; CHECK: DW_TAG_structure_type 37; CHECK-NOT: {{DW_TAG|NULL}} 38; CHECK: DW_TAG_member 39; CHECK-NOT: {{DW_TAG|NULL}} 40; CHECK: [[M_FN2_DECL:.*]]: DW_TAG_subprogram 41; CHECK-NOT: DW_TAG 42; CHECK: DW_AT_name ("m_fn2") 43; CHECK-NOT: {{DW_TAG|NULL}} 44; CHECK: DW_TAG_formal_parameter 45 46; The abstract definition of C::m_fn2 47; CHECK: [[M_FN2_ABS_DEF:.*]]: DW_TAG_subprogram 48; CHECK-NOT: DW_TAG 49; CHECK: DW_AT_specification {{.*}}[[M_FN2_DECL]] 50; CHECK-NOT: DW_TAG 51; CHECK: DW_AT_inline 52; CHECK-NOT: {{DW_TAG|NULL}} 53; CHECK: [[M_FN2_THIS_ABS_DEF:.*]]: DW_TAG_formal_parameter 54; CHECK-NOT: DW_TAG 55; CHECK: DW_AT_name ("this") 56 57; Skip some other functions 58; CHECK: DW_TAG_subprogram 59; CHECK: DW_TAG_subprogram 60; CHECK: DW_TAG_subprogram 61 62; The concrete definition of C::m_fn2 63; CHECK: DW_TAG_subprogram 64; CHECK-NOT: DW_TAG 65; CHECK: DW_AT_abstract_origin {{.*}}[[M_FN2_ABS_DEF]] 66; CHECK-NOT: {{DW_TAG|NULL}} 67; CHECK: DW_TAG_formal_parameter 68; CHECK-NOT: DW_TAG 69; CHECK: DW_AT_abstract_origin {{.*}}[[M_FN2_THIS_ABS_DEF]] 70; CHECK-NOT: {{DW_TAG|NULL}} 71; Inlined fn3: 72; CHECK: DW_TAG_inlined_subroutine 73; CHECK-NOT: {{DW_TAG|NULL}} 74; Inlined fn6: 75; CHECK: DW_TAG_inlined_subroutine 76; CHECK-NOT: {{DW_TAG|NULL}} 77; Inlined C::m_fn2: 78; CHECK: DW_TAG_inlined_subroutine 79; CHECK-NOT: DW_TAG 80; CHECK: DW_AT_abstract_origin {{.*}}[[M_FN2_ABS_DEF]] 81; CHECK-NOT: {{DW_TAG|NULL}} 82; CHECK: DW_TAG_formal_parameter 83; CHECK-NOT: DW_TAG 84; CHECK: DW_AT_abstract_origin {{.*}}[[M_FN2_THIS_ABS_DEF]] 85 86source_filename = "test/DebugInfo/Generic/recursive_inlining.ll" 87 88%struct.C = type { i32 } 89 90@x = global ptr null, align 8, !dbg !0 91 92; Function Attrs: nounwind 93define void @_Z3fn6v() #0 !dbg !20 { 94entry: 95 tail call void @_Z3fn8v() #3, !dbg !23 96 %0 = load ptr, ptr @x, align 8, !dbg !24, !tbaa !25 97 tail call void @llvm.dbg.value(metadata ptr %0, metadata !29, metadata !32) #3, !dbg !33 98 tail call void @_Z3fn8v() #3, !dbg !34 99 %1 = load i32, ptr %0, 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(ptr nocapture readonly %this) #0 align 2 !dbg !30 { 117entry: 118 tail call void @llvm.dbg.value(metadata ptr %this, metadata !29, metadata !32), !dbg !44 119 tail call void @_Z3fn8v() #3, !dbg !45 120 %0 = load i32, ptr %this, align 4, !dbg !46, !tbaa !37 121 %tobool = icmp eq i32 %0, 0, !dbg !46 122 br i1 %tobool, label %if.end, label %if.then, !dbg !46 123 124if.then: ; preds = %entry 125 tail call void @_Z3fn2iiii(i32 0, i32 0, i32 0, i32 0) #3, !dbg !47 126 br label %if.end, !dbg !47 127 128if.end: ; preds = %if.then, %entry 129 tail call void @_Z3fn8v() #3, !dbg !48 130 %1 = load ptr, ptr @x, align 8, !dbg !52, !tbaa !25 131 tail call void @llvm.dbg.value(metadata ptr %1, metadata !29, metadata !32) #3, !dbg !53 132 tail call void @_Z3fn8v() #3, !dbg !54 133 %2 = load i32, ptr %1, align 4, !dbg !55, !tbaa !37 134 %tobool.i.i = icmp eq i32 %2, 0, !dbg !55 135 br i1 %tobool.i.i, label %_Z3fn6v.exit, label %if.then.i.i, !dbg !55 136 137if.then.i.i: ; preds = %if.end 138 139 tail call void @_Z3fn2iiii(i32 0, i32 0, i32 0, i32 0) #3, !dbg !56 140 br label %_Z3fn6v.exit, !dbg !56 141 142_Z3fn6v.exit: ; preds = %if.then.i.i, %if.end 143 tail call void @_Z3fn3v() #3, !dbg !57 144 ret void, !dbg !58 145} 146 147; Function Attrs: nounwind 148define void @_Z3fn3v() #0 !dbg !50 { 149entry: 150 br label %tailrecurse 151 152tailrecurse: ; preds = %tailrecurse.backedge, %entry 153 tail call void @_Z3fn8v() #3, !dbg !59 154 %0 = load ptr, ptr @x, align 8, !dbg !61, !tbaa !25 155 tail call void @llvm.dbg.value(metadata ptr %0, metadata !29, metadata !32) #3, !dbg !62 156 tail call void @_Z3fn8v() #3, !dbg !63 157 %1 = load i32, ptr %0, align 4, !dbg !64, !tbaa !37 158 %tobool.i.i = icmp eq i32 %1, 0, !dbg !64 159 br i1 %tobool.i.i, label %tailrecurse.backedge, label %if.then.i.i, !dbg !64 160 161tailrecurse.backedge: ; preds = %if.then.i.i, %tailrecurse 162 br label %tailrecurse 163 164if.then.i.i: ; preds = %tailrecurse 165 tail call void @_Z3fn2iiii(i32 0, i32 0, i32 0, i32 0) #3, !dbg !65 166 br label %tailrecurse.backedge, !dbg !65 167} 168 169; Function Attrs: nounwind 170define void @_Z3fn4v() #0 !dbg !66 { 171entry: 172 %0 = load ptr, ptr @x, align 8, !dbg !67, !tbaa !25 173 tail call void @_ZN1C5m_fn2Ev(ptr %0), !dbg !67 174 ret void, !dbg !67 175} 176 177; Function Attrs: nounwind 178define void @_Z3fn5v() #0 !dbg !68 { 179entry: 180 %0 = load ptr, ptr @x, align 8, !dbg !69, !tbaa !25 181 tail call void @_ZN1C5m_fn2Ev(ptr %0), !dbg !69 182 ret void, !dbg !69 183} 184 185declare void @_Z3fn2iiii(i32, i32, i32, i32) #1 186 187; Function Attrs: nounwind readnone 188declare void @llvm.dbg.value(metadata, metadata, metadata) #2 189 190attributes #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" } 191attributes #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" } 192attributes #2 = { nounwind readnone } 193attributes #3 = { nounwind } 194 195!llvm.dbg.cu = !{!12} 196!llvm.module.flags = !{!17, !18} 197!llvm.ident = !{!19} 198 199!0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression()) 200!1 = !DIGlobalVariable(name: "x", scope: null, file: !2, line: 13, type: !3, isLocal: false, isDefinition: true) 201!2 = !DIFile(filename: "recursive_inlining.cpp", directory: "/usr/local/google/home/blaikie/dev/scratch/missing_concrete_variable_on_darwin/reduce") 202!3 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !4, size: 64, align: 64) 203!4 = !DICompositeType(tag: DW_TAG_structure_type, name: "C", file: !2, line: 5, size: 32, align: 32, elements: !5, identifier: "_ZTS1C") 204!5 = !{!6, !8} 205!6 = !DIDerivedType(tag: DW_TAG_member, name: "b", scope: !4, file: !2, line: 6, baseType: !7, size: 32, align: 32) 206!7 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed) 207!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) 208!9 = !DISubroutineType(types: !10) 209!10 = !{null, !11} 210!11 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !4, size: 64, align: 64, flags: DIFlagArtificial | DIFlagObjectPointer) 211!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) 212!13 = !DIFile(filename: "<stdin>", directory: "/usr/local/google/home/blaikie/dev/scratch/missing_concrete_variable_on_darwin/reduce") 213!14 = !{} 214!15 = !{!4} 215!16 = !{!0} 216!17 = !{i32 2, !"Dwarf Version", i32 4} 217!18 = !{i32 2, !"Debug Info Version", i32 3} 218!19 = !{!"clang version 3.6.0 "} 219!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) 220!21 = !DISubroutineType(types: !22) 221!22 = !{null} 222!23 = !DILocation(line: 16, scope: !20) 223!24 = !DILocation(line: 17, scope: !20) 224!25 = !{!26, !26, i64 0} 225!26 = !{!"any pointer", !27, i64 0} 226!27 = !{!"omnipotent char", !28, i64 0} 227!28 = !{!"Simple C/C++ TBAA"} 228!29 = !DILocalVariable(name: "this", arg: 1, scope: !30, type: !3, flags: DIFlagArtificial | DIFlagObjectPointer) 229!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) 230!31 = !{!29} 231!32 = !DIExpression() 232!33 = !DILocation(line: 0, scope: !30, inlinedAt: !24) 233!34 = !DILocation(line: 8, scope: !30, inlinedAt: !24) 234!35 = !DILocation(line: 9, scope: !36, inlinedAt: !24) 235!36 = distinct !DILexicalBlock(scope: !30, file: !2, line: 9) 236!37 = !{!38, !39, i64 0} 237!38 = !{!"struct", !39, i64 0} 238!39 = !{!"int", !27, i64 0} 239!40 = !DILocation(line: 9, scope: !41, inlinedAt: !24) 240!41 = distinct !DILexicalBlock(scope: !36, file: !2, line: 9) 241!42 = !DILocation(line: 10, scope: !30, inlinedAt: !24) 242!43 = !DILocation(line: 19, scope: !20) 243!44 = !DILocation(line: 0, scope: !30) 244!45 = !DILocation(line: 8, scope: !30) 245!46 = !DILocation(line: 9, scope: !36) 246!47 = !DILocation(line: 9, scope: !41) 247!48 = !DILocation(line: 16, scope: !20, inlinedAt: !49) 248!49 = !DILocation(line: 20, scope: !50, inlinedAt: !51) 249!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) 250!51 = !DILocation(line: 10, scope: !30) 251!52 = !DILocation(line: 17, scope: !20, inlinedAt: !49) 252!53 = !DILocation(line: 0, scope: !30, inlinedAt: !52) 253!54 = !DILocation(line: 8, scope: !30, inlinedAt: !52) 254!55 = !DILocation(line: 9, scope: !36, inlinedAt: !52) 255!56 = !DILocation(line: 9, scope: !41, inlinedAt: !52) 256!57 = !DILocation(line: 10, scope: !30, inlinedAt: !52) 257!58 = !DILocation(line: 11, scope: !30) 258!59 = !DILocation(line: 16, scope: !20, inlinedAt: !60) 259!60 = !DILocation(line: 20, scope: !50) 260!61 = !DILocation(line: 17, scope: !20, inlinedAt: !60) 261!62 = !DILocation(line: 0, scope: !30, inlinedAt: !61) 262!63 = !DILocation(line: 8, scope: !30, inlinedAt: !61) 263!64 = !DILocation(line: 9, scope: !36, inlinedAt: !61) 264!65 = !DILocation(line: 9, scope: !41, inlinedAt: !61) 265!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) 266!67 = !DILocation(line: 21, scope: !66) 267!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) 268!69 = !DILocation(line: 22, scope: !68) 269 270