1 ; REQUIRES: object-emission 2 3 ; RUN: %llc_dwarf -filetype=obj -O0 < %s | llvm-dwarfdump -v -debug-info - | FileCheck %s 4 5 ; This isn't a very pretty test case - I imagine there might be other ways to 6 ; tickle the optimizers into producing the desired code, but I haven't found 7 ; them. 8 9 ; The issue is when a function is inlined into itself, the inlined argument 10 ; accidentally overwrote the concrete argument and was lost. 11 12 ; IR generated from the following source compiled with clang -g: 13 ; void fn1(void *); 14 ; void fn2(int, int, int, int); 15 ; void fn3(); 16 ; void fn8(); 17 ; struct C { 18 ; int b; 19 ; void m_fn2() { 20 ; fn8(); 21 ; if (b) fn2(0, 0, 0, 0); 22 ; fn3(); 23 ; } 24 ; }; 25 ; C *x; 26 ; inline void fn7() {} 27 ; void fn6() { 28 ; fn8(); 29 ; x->m_fn2(); 30 ; fn7(); 31 ; } 32 ; void fn3() { fn6(); } 33 ; void fn4() { x->m_fn2(); } 34 ; void fn5() { x->m_fn2(); } 35 36 ; The definition of C and declaration of C::m_fn2 37 ; CHECK: DW_TAG_structure_type 38 ; CHECK-NOT: {{DW_TAG|NULL}} 39 ; CHECK: DW_TAG_member 40 ; CHECK-NOT: {{DW_TAG|NULL}} 41 ; CHECK: [[M_FN2_DECL:.*]]: DW_TAG_subprogram 42 ; CHECK-NOT: DW_TAG 43 ; CHECK: DW_AT_name {{.*}} "m_fn2" 44 ; CHECK-NOT: {{DW_TAG|NULL}} 45 ; CHECK: DW_TAG_formal_parameter 46 47 ; The abstract definition of C::m_fn2 48 ; CHECK: [[M_FN2_ABS_DEF:.*]]: DW_TAG_subprogram 49 ; CHECK-NOT: DW_TAG 50 ; CHECK: DW_AT_specification {{.*}} {[[M_FN2_DECL]]} 51 ; CHECK-NOT: DW_TAG 52 ; CHECK: DW_AT_inline 53 ; CHECK-NOT: {{DW_TAG|NULL}} 54 ; CHECK: [[M_FN2_THIS_ABS_DEF:.*]]: DW_TAG_formal_parameter 55 ; CHECK-NOT: DW_TAG 56 ; CHECK: DW_AT_name {{.*}} "this" 57 58 ; Skip some other functions 59 ; CHECK: DW_TAG_subprogram 60 ; CHECK: DW_TAG_subprogram 61 ; CHECK: DW_TAG_subprogram 62 63 ; The concrete definition of C::m_fn2 64 ; CHECK: DW_TAG_subprogram 65 ; CHECK-NOT: DW_TAG 66 ; CHECK: DW_AT_abstract_origin {{.*}} {[[M_FN2_ABS_DEF]]} 67 ; CHECK-NOT: {{DW_TAG|NULL}} 68 ; CHECK: DW_TAG_formal_parameter 69 ; CHECK-NOT: DW_TAG 70 ; CHECK: DW_AT_abstract_origin {{.*}} {[[M_FN2_THIS_ABS_DEF]]} 71 ; CHECK-NOT: {{DW_TAG|NULL}} 72 ; Inlined fn3: 73 ; CHECK: DW_TAG_inlined_subroutine 74 ; CHECK-NOT: {{DW_TAG|NULL}} 75 ; Inlined fn6: 76 ; CHECK: DW_TAG_inlined_subroutine 77 ; CHECK-NOT: {{DW_TAG|NULL}} 78 ; Inlined C::m_fn2: 79 ; CHECK: DW_TAG_inlined_subroutine 80 ; CHECK-NOT: DW_TAG 81 ; CHECK: DW_AT_abstract_origin {{.*}} {[[M_FN2_ABS_DEF]]} 82 ; CHECK-NOT: {{DW_TAG|NULL}} 83 ; CHECK: DW_TAG_formal_parameter 84 ; CHECK-NOT: DW_TAG 85 ; CHECK: DW_AT_abstract_origin {{.*}} {[[M_FN2_THIS_ABS_DEF]]} 86 87 source_filename = "test/DebugInfo/Generic/recursive_inlining.ll" 88 89 %struct.C = type { i32 } 90 91 @x = global %struct.C* null, align 8, !dbg !0 92 93 ; Function Attrs: nounwind 94 define void @_Z3fn6v() #0 !dbg !20 { 95 entry: 96 tail call void @_Z3fn8v() #3, !dbg !23 97 %0 = load %struct.C*, %struct.C** @x, align 8, !dbg !24, !tbaa !25 98 tail call void @llvm.dbg.value(metadata %struct.C* %0, metadata !29, metadata !32) #3, !dbg !33 99 tail call void @_Z3fn8v() #3, !dbg !34 100 %b.i = getelementptr inbounds %struct.C, %struct.C* %0, i64 0, i32 0, !dbg !35 101 %1 = load i32, i32* %b.i, align 4, !dbg !35, !tbaa !37 102 %tobool.i = icmp eq i32 %1, 0, !dbg !35 103 br i1 %tobool.i, label %_ZN1C5m_fn2Ev.exit, label %if.then.i, !dbg !35 104 105 if.then.i: ; preds = %entry 106 tail call void @_Z3fn2iiii(i32 0, i32 0, i32 0, i32 0) #3, !dbg !40 107 br label %_ZN1C5m_fn2Ev.exit, !dbg !40 108 109 _ZN1C5m_fn2Ev.exit: ; preds = %if.then.i, %entry 110 tail call void @_Z3fn3v() #3, !dbg !42 111 ret void, !dbg !43 112 } 113 114 declare void @_Z3fn8v() #1 115 116 ; Function Attrs: nounwind 117 118 define linkonce_odr void @_ZN1C5m_fn2Ev(%struct.C* nocapture readonly %this) #0 align 2 !dbg !30 { 119 entry: 120 tail call void @llvm.dbg.value(metadata %struct.C* %this, metadata !29, metadata !32), !dbg !44 121 tail call void @_Z3fn8v() #3, !dbg !45 122 %b = getelementptr inbounds %struct.C, %struct.C* %this, i64 0, i32 0, !dbg !46 123 %0 = load i32, i32* %b, align 4, !dbg !46, !tbaa !37 124 %tobool = icmp eq i32 %0, 0, !dbg !46 125 br i1 %tobool, label %if.end, label %if.then, !dbg !46 126 127 if.then: ; preds = %entry 128 tail call void @_Z3fn2iiii(i32 0, i32 0, i32 0, i32 0) #3, !dbg !47 129 br label %if.end, !dbg !47 130 131 if.end: ; preds = %if.then, %entry 132 tail call void @_Z3fn8v() #3, !dbg !48 133 %1 = load %struct.C*, %struct.C** @x, align 8, !dbg !52, !tbaa !25 134 tail call void @llvm.dbg.value(metadata %struct.C* %1, metadata !29, metadata !32) #3, !dbg !53 135 tail call void @_Z3fn8v() #3, !dbg !54 136 %b.i.i = getelementptr inbounds %struct.C, %struct.C* %1, i64 0, i32 0, !dbg !55 137 %2 = load i32, i32* %b.i.i, align 4, !dbg !55, !tbaa !37 138 %tobool.i.i = icmp eq i32 %2, 0, !dbg !55 139 br i1 %tobool.i.i, label %_Z3fn6v.exit, label %if.then.i.i, !dbg !55 140 141 if.then.i.i: ; preds = %if.end 142 143 tail call void @_Z3fn2iiii(i32 0, i32 0, i32 0, i32 0) #3, !dbg !56 144 br label %_Z3fn6v.exit, !dbg !56 145 146 _Z3fn6v.exit: ; preds = %if.then.i.i, %if.end 147 tail call void @_Z3fn3v() #3, !dbg !57 148 ret void, !dbg !58 149 } 150 151 ; Function Attrs: nounwind 152 define void @_Z3fn3v() #0 !dbg !50 { 153 entry: 154 br label %tailrecurse 155 156 tailrecurse: ; preds = %tailrecurse.backedge, %entry 157 tail call void @_Z3fn8v() #3, !dbg !59 158 %0 = load %struct.C*, %struct.C** @x, align 8, !dbg !61, !tbaa !25 159 tail call void @llvm.dbg.value(metadata %struct.C* %0, metadata !29, metadata !32) #3, !dbg !62 160 tail call void @_Z3fn8v() #3, !dbg !63 161 %b.i.i = getelementptr inbounds %struct.C, %struct.C* %0, i64 0, i32 0, !dbg !64 162 %1 = load i32, i32* %b.i.i, align 4, !dbg !64, !tbaa !37 163 %tobool.i.i = icmp eq i32 %1, 0, !dbg !64 164 br i1 %tobool.i.i, label %tailrecurse.backedge, label %if.then.i.i, !dbg !64 165 166 tailrecurse.backedge: ; preds = %if.then.i.i, %tailrecurse 167 br label %tailrecurse 168 169 if.then.i.i: ; preds = %tailrecurse 170 tail call void @_Z3fn2iiii(i32 0, i32 0, i32 0, i32 0) #3, !dbg !65 171 br label %tailrecurse.backedge, !dbg !65 172 } 173 174 ; Function Attrs: nounwind 175 define void @_Z3fn4v() #0 !dbg !66 { 176 entry: 177 %0 = load %struct.C*, %struct.C** @x, align 8, !dbg !67, !tbaa !25 178 tail call void @_ZN1C5m_fn2Ev(%struct.C* %0), !dbg !67 179 ret void, !dbg !67 180 } 181 182 ; Function Attrs: nounwind 183 define void @_Z3fn5v() #0 !dbg !68 { 184 entry: 185 %0 = load %struct.C*, %struct.C** @x, align 8, !dbg !69, !tbaa !25 186 tail call void @_ZN1C5m_fn2Ev(%struct.C* %0), !dbg !69 187 ret void, !dbg !69 188 } 189 190 declare void @_Z3fn2iiii(i32, i32, i32, i32) #1 191 192 ; Function Attrs: nounwind readnone 193 declare void @llvm.dbg.value(metadata, metadata, metadata) #2 194 195 attributes #0 = { nounwind "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "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" } 196 attributes #1 = { "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "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" } 197 attributes #2 = { nounwind readnone } 198 attributes #3 = { nounwind } 199 200 !llvm.dbg.cu = !{!12} 201 !llvm.module.flags = !{!17, !18} 202 !llvm.ident = !{!19} 203 204 !0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression()) 205 !1 = !DIGlobalVariable(name: "x", scope: null, file: !2, line: 13, type: !3, isLocal: false, isDefinition: true) 206 !2 = !DIFile(filename: "recursive_inlining.cpp", directory: "/usr/local/google/home/blaikie/dev/scratch/missing_concrete_variable_on_darwin/reduce") 207 !3 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !4, size: 64, align: 64) 208 !4 = !DICompositeType(tag: DW_TAG_structure_type, name: "C", file: !2, line: 5, size: 32, align: 32, elements: !5, identifier: "_ZTS1C") 209 !5 = !{!6, !8} 210 !6 = !DIDerivedType(tag: DW_TAG_member, name: "b", scope: !4, file: !2, line: 6, baseType: !7, size: 32, align: 32) 211 !7 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed) 212 !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) 213 !9 = !DISubroutineType(types: !10) 214 !10 = !{null, !11} 215 !11 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !4, size: 64, align: 64, flags: DIFlagArtificial | DIFlagObjectPointer) 216 !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) 217 !13 = !DIFile(filename: "<stdin>", directory: "/usr/local/google/home/blaikie/dev/scratch/missing_concrete_variable_on_darwin/reduce") 218 !14 = !{} 219 !15 = !{!4} 220 !16 = !{!0} 221 !17 = !{i32 2, !"Dwarf Version", i32 4} 222 !18 = !{i32 2, !"Debug Info Version", i32 3} 223 !19 = !{!"clang version 3.6.0 "} 224 !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) 225 !21 = !DISubroutineType(types: !22) 226 !22 = !{null} 227 !23 = !DILocation(line: 16, scope: !20) 228 !24 = !DILocation(line: 17, scope: !20) 229 !25 = !{!26, !26, i64 0} 230 !26 = !{!"any pointer", !27, i64 0} 231 !27 = !{!"omnipotent char", !28, i64 0} 232 !28 = !{!"Simple C/C++ TBAA"} 233 !29 = !DILocalVariable(name: "this", arg: 1, scope: !30, type: !3, flags: DIFlagArtificial | DIFlagObjectPointer) 234 !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) 235 !31 = !{!29} 236 !32 = !DIExpression() 237 !33 = !DILocation(line: 0, scope: !30, inlinedAt: !24) 238 !34 = !DILocation(line: 8, scope: !30, inlinedAt: !24) 239 !35 = !DILocation(line: 9, scope: !36, inlinedAt: !24) 240 !36 = distinct !DILexicalBlock(scope: !30, file: !2, line: 9) 241 !37 = !{!38, !39, i64 0} 242 !38 = !{!"struct", !39, i64 0} 243 !39 = !{!"int", !27, i64 0} 244 !40 = !DILocation(line: 9, scope: !41, inlinedAt: !24) 245 !41 = distinct !DILexicalBlock(scope: !36, file: !2, line: 9) 246 !42 = !DILocation(line: 10, scope: !30, inlinedAt: !24) 247 !43 = !DILocation(line: 19, scope: !20) 248 !44 = !DILocation(line: 0, scope: !30) 249 !45 = !DILocation(line: 8, scope: !30) 250 !46 = !DILocation(line: 9, scope: !36) 251 !47 = !DILocation(line: 9, scope: !41) 252 !48 = !DILocation(line: 16, scope: !20, inlinedAt: !49) 253 !49 = !DILocation(line: 20, scope: !50, inlinedAt: !51) 254 !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) 255 !51 = !DILocation(line: 10, scope: !30) 256 !52 = !DILocation(line: 17, scope: !20, inlinedAt: !49) 257 !53 = !DILocation(line: 0, scope: !30, inlinedAt: !52) 258 !54 = !DILocation(line: 8, scope: !30, inlinedAt: !52) 259 !55 = !DILocation(line: 9, scope: !36, inlinedAt: !52) 260 !56 = !DILocation(line: 9, scope: !41, inlinedAt: !52) 261 !57 = !DILocation(line: 10, scope: !30, inlinedAt: !52) 262 !58 = !DILocation(line: 11, scope: !30) 263 !59 = !DILocation(line: 16, scope: !20, inlinedAt: !60) 264 !60 = !DILocation(line: 20, scope: !50) 265 !61 = !DILocation(line: 17, scope: !20, inlinedAt: !60) 266 !62 = !DILocation(line: 0, scope: !30, inlinedAt: !61) 267 !63 = !DILocation(line: 8, scope: !30, inlinedAt: !61) 268 !64 = !DILocation(line: 9, scope: !36, inlinedAt: !61) 269 !65 = !DILocation(line: 9, scope: !41, inlinedAt: !61) 270 !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) 271 !67 = !DILocation(line: 21, scope: !66) 272 !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) 273 !69 = !DILocation(line: 22, scope: !68) 274 275
