1 ; REQUIRES: object-emission 2 3 ; RUN: %llc_dwarf -filetype=obj -O0 < %s | llvm-dwarfdump -debug-dump=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 88 89 %struct.C = type { i32 } 90 91 @x = global %struct.C* null, align 8 92 93 ; Function Attrs: nounwind 94 define void @_Z3fn6v() #0 !dbg !14 { 95 entry: 96 tail call void @_Z3fn8v() #3, !dbg !31 97 %0 = load %struct.C*, %struct.C** @x, align 8, !dbg !32, !tbaa !33 98 tail call void @llvm.dbg.value(metadata %struct.C* %0, i64 0, metadata !37, metadata !DIExpression()) #3, !dbg !38 99 tail call void @_Z3fn8v() #3, !dbg !39 100 %b.i = getelementptr inbounds %struct.C, %struct.C* %0, i64 0, i32 0, !dbg !40 101 %1 = load i32, i32* %b.i, align 4, !dbg !40, !tbaa !42 102 %tobool.i = icmp eq i32 %1, 0, !dbg !40 103 br i1 %tobool.i, label %_ZN1C5m_fn2Ev.exit, label %if.then.i, !dbg !40 104 105 if.then.i: ; preds = %entry 106 tail call void @_Z3fn2iiii(i32 0, i32 0, i32 0, i32 0) #3, !dbg !45 107 br label %_ZN1C5m_fn2Ev.exit, !dbg !45 108 109 _ZN1C5m_fn2Ev.exit: ; preds = %entry, %if.then.i 110 tail call void @_Z3fn3v() #3, !dbg !47 111 ret void, !dbg !48 112 } 113 114 declare void @_Z3fn8v() #1 115 116 ; Function Attrs: nounwind 117 define linkonce_odr void @_ZN1C5m_fn2Ev(%struct.C* nocapture readonly %this) #0 align 2 !dbg !22 { 118 entry: 119 tail call void @llvm.dbg.value(metadata %struct.C* %this, i64 0, metadata !24, metadata !DIExpression()), !dbg !49 120 tail call void @_Z3fn8v() #3, !dbg !50 121 %b = getelementptr inbounds %struct.C, %struct.C* %this, i64 0, i32 0, !dbg !51 122 %0 = load i32, i32* %b, align 4, !dbg !51, !tbaa !42 123 %tobool = icmp eq i32 %0, 0, !dbg !51 124 br i1 %tobool, label %if.end, label %if.then, !dbg !51 125 126 if.then: ; preds = %entry 127 tail call void @_Z3fn2iiii(i32 0, i32 0, i32 0, i32 0) #3, !dbg !52 128 br label %if.end, !dbg !52 129 130 if.end: ; preds = %entry, %if.then 131 tail call void @_Z3fn8v() #3, !dbg !53 132 %1 = load %struct.C*, %struct.C** @x, align 8, !dbg !56, !tbaa !33 133 tail call void @llvm.dbg.value(metadata %struct.C* %1, i64 0, metadata !57, metadata !DIExpression()) #3, !dbg !58 134 tail call void @_Z3fn8v() #3, !dbg !59 135 %b.i.i = getelementptr inbounds %struct.C, %struct.C* %1, i64 0, i32 0, !dbg !60 136 %2 = load i32, i32* %b.i.i, align 4, !dbg !60, !tbaa !42 137 %tobool.i.i = icmp eq i32 %2, 0, !dbg !60 138 br i1 %tobool.i.i, label %_Z3fn6v.exit, label %if.then.i.i, !dbg !60 139 140 if.then.i.i: ; preds = %if.end 141 tail call void @_Z3fn2iiii(i32 0, i32 0, i32 0, i32 0) #3, !dbg !61 142 br label %_Z3fn6v.exit, !dbg !61 143 144 _Z3fn6v.exit: ; preds = %if.end, %if.then.i.i 145 tail call void @_Z3fn3v() #3, !dbg !62 146 ret void, !dbg !63 147 } 148 149 ; Function Attrs: nounwind 150 define void @_Z3fn3v() #0 !dbg !18 { 151 entry: 152 br label %tailrecurse 153 154 tailrecurse: ; preds = %tailrecurse.backedge, %entry 155 tail call void @_Z3fn8v() #3, !dbg !64 156 %0 = load %struct.C*, %struct.C** @x, align 8, !dbg !66, !tbaa !33 157 tail call void @llvm.dbg.value(metadata %struct.C* %0, i64 0, metadata !67, metadata !DIExpression()) #3, !dbg !68 158 tail call void @_Z3fn8v() #3, !dbg !69 159 %b.i.i = getelementptr inbounds %struct.C, %struct.C* %0, i64 0, i32 0, !dbg !70 160 %1 = load i32, i32* %b.i.i, align 4, !dbg !70, !tbaa !42 161 %tobool.i.i = icmp eq i32 %1, 0, !dbg !70 162 br i1 %tobool.i.i, label %tailrecurse.backedge, label %if.then.i.i, !dbg !70 163 164 tailrecurse.backedge: ; preds = %tailrecurse, %if.then.i.i 165 br label %tailrecurse 166 167 if.then.i.i: ; preds = %tailrecurse 168 tail call void @_Z3fn2iiii(i32 0, i32 0, i32 0, i32 0) #3, !dbg !71 169 br label %tailrecurse.backedge, !dbg !71 170 } 171 172 ; Function Attrs: nounwind 173 define void @_Z3fn4v() #0 !dbg !19 { 174 entry: 175 %0 = load %struct.C*, %struct.C** @x, align 8, !dbg !72, !tbaa !33 176 tail call void @_ZN1C5m_fn2Ev(%struct.C* %0), !dbg !72 177 ret void, !dbg !72 178 } 179 180 ; Function Attrs: nounwind 181 define void @_Z3fn5v() #0 !dbg !20 { 182 entry: 183 %0 = load %struct.C*, %struct.C** @x, align 8, !dbg !73, !tbaa !33 184 tail call void @_ZN1C5m_fn2Ev(%struct.C* %0), !dbg !73 185 ret void, !dbg !73 186 } 187 188 declare void @_Z3fn2iiii(i32, i32, i32, i32) #1 189 190 ; Function Attrs: nounwind readnone 191 declare void @llvm.dbg.value(metadata, i64, metadata, metadata) #2 192 193 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" } 194 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" } 195 attributes #2 = { nounwind readnone } 196 attributes #3 = { nounwind } 197 198 !llvm.dbg.cu = !{!0} 199 !llvm.module.flags = !{!28, !29} 200 !llvm.ident = !{!30} 201 202 !0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, producer: "clang version 3.6.0 ", isOptimized: true, emissionKind: 1, file: !1, enums: !2, retainedTypes: !3, subprograms: !13, globals: !26, imports: !2) 203 !1 = !DIFile(filename: "<stdin>", directory: "/usr/local/google/home/blaikie/dev/scratch/missing_concrete_variable_on_darwin/reduce") 204 !2 = !{} 205 !3 = !{!4} 206 !4 = !DICompositeType(tag: DW_TAG_structure_type, name: "C", line: 5, size: 32, align: 32, file: !5, elements: !6, identifier: "_ZTS1C") 207 !5 = !DIFile(filename: "recursive_inlining.cpp", directory: "/usr/local/google/home/blaikie/dev/scratch/missing_concrete_variable_on_darwin/reduce") 208 !6 = !{!7, !9} 209 !7 = !DIDerivedType(tag: DW_TAG_member, name: "b", line: 6, size: 32, align: 32, file: !5, scope: !"_ZTS1C", baseType: !8) 210 !8 = !DIBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed) 211 !9 = !DISubprogram(name: "m_fn2", linkageName: "_ZN1C5m_fn2Ev", line: 7, isLocal: false, isDefinition: false, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, scopeLine: 7, file: !5, scope: !"_ZTS1C", type: !10) 212 !10 = !DISubroutineType(types: !11) 213 !11 = !{null, !12} 214 !12 = !DIDerivedType(tag: DW_TAG_pointer_type, size: 64, align: 64, flags: DIFlagArtificial | DIFlagObjectPointer, baseType: !"_ZTS1C") 215 !13 = !{!14, !18, !19, !20, !21, !22} 216 !14 = distinct !DISubprogram(name: "fn6", linkageName: "_Z3fn6v", line: 15, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, scopeLine: 15, file: !5, scope: !15, type: !16, variables: !2) 217 !15 = !DIFile(filename: "recursive_inlining.cpp", directory: "/usr/local/google/home/blaikie/dev/scratch/missing_concrete_variable_on_darwin/reduce") 218 !16 = !DISubroutineType(types: !17) 219 !17 = !{null} 220 !18 = distinct !DISubprogram(name: "fn3", linkageName: "_Z3fn3v", line: 20, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, scopeLine: 20, file: !5, scope: !15, type: !16, variables: !2) 221 !19 = distinct !DISubprogram(name: "fn4", linkageName: "_Z3fn4v", line: 21, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, scopeLine: 21, file: !5, scope: !15, type: !16, variables: !2) 222 !20 = distinct !DISubprogram(name: "fn5", linkageName: "_Z3fn5v", line: 22, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, scopeLine: 22, file: !5, scope: !15, type: !16, variables: !2) 223 !21 = distinct !DISubprogram(name: "fn7", linkageName: "_Z3fn7v", line: 14, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, scopeLine: 14, file: !5, scope: !15, type: !16, variables: !2) 224 !22 = distinct !DISubprogram(name: "m_fn2", linkageName: "_ZN1C5m_fn2Ev", line: 7, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, scopeLine: 7, file: !5, scope: !"_ZTS1C", type: !10, declaration: !9, variables: !23) 225 !23 = !{!24} 226 !24 = !DILocalVariable(name: "this", arg: 1, flags: DIFlagArtificial | DIFlagObjectPointer, scope: !22, type: !25) 227 !25 = !DIDerivedType(tag: DW_TAG_pointer_type, size: 64, align: 64, baseType: !"_ZTS1C") 228 !26 = !{!27} 229 !27 = !DIGlobalVariable(name: "x", line: 13, isLocal: false, isDefinition: true, scope: null, file: !15, type: !25, variable: %struct.C** @x) 230 !28 = !{i32 2, !"Dwarf Version", i32 4} 231 !29 = !{i32 2, !"Debug Info Version", i32 3} 232 !30 = !{!"clang version 3.6.0 "} 233 !31 = !DILocation(line: 16, scope: !14) 234 !32 = !DILocation(line: 17, scope: !14) 235 !33 = !{!34, !34, i64 0} 236 !34 = !{!"any pointer", !35, i64 0} 237 !35 = !{!"omnipotent char", !36, i64 0} 238 !36 = !{!"Simple C/C++ TBAA"} 239 !37 = !DILocalVariable(name: "this", arg: 1, flags: DIFlagArtificial | DIFlagObjectPointer, scope: !22, type: !25) 240 !38 = !DILocation(line: 0, scope: !22, inlinedAt: !32) 241 !39 = !DILocation(line: 8, scope: !22, inlinedAt: !32) 242 !40 = !DILocation(line: 9, scope: !41, inlinedAt: !32) 243 !41 = distinct !DILexicalBlock(line: 9, column: 0, file: !5, scope: !22) 244 !42 = !{!43, !44, i64 0} 245 !43 = !{!"_ZTS1C", !44, i64 0} 246 !44 = !{!"int", !35, i64 0} 247 !45 = !DILocation(line: 9, scope: !46, inlinedAt: !32) 248 !46 = distinct !DILexicalBlock(line: 9, column: 0, file: !5, scope: !41) 249 !47 = !DILocation(line: 10, scope: !22, inlinedAt: !32) 250 !48 = !DILocation(line: 19, scope: !14) 251 !49 = !DILocation(line: 0, scope: !22) 252 !50 = !DILocation(line: 8, scope: !22) 253 !51 = !DILocation(line: 9, scope: !41) 254 !52 = !DILocation(line: 9, scope: !46) 255 !53 = !DILocation(line: 16, scope: !14, inlinedAt: !54) 256 !54 = !DILocation(line: 20, scope: !18, inlinedAt: !55) 257 !55 = !DILocation(line: 10, scope: !22) 258 !56 = !DILocation(line: 17, scope: !14, inlinedAt: !54) 259 !57 = !DILocalVariable(name: "this", arg: 1, flags: DIFlagArtificial | DIFlagObjectPointer, scope: !22, type: !25) 260 !58 = !DILocation(line: 0, scope: !22, inlinedAt: !56) 261 !59 = !DILocation(line: 8, scope: !22, inlinedAt: !56) 262 !60 = !DILocation(line: 9, scope: !41, inlinedAt: !56) 263 !61 = !DILocation(line: 9, scope: !46, inlinedAt: !56) 264 !62 = !DILocation(line: 10, scope: !22, inlinedAt: !56) 265 !63 = !DILocation(line: 11, scope: !22) 266 !64 = !DILocation(line: 16, scope: !14, inlinedAt: !65) 267 !65 = !DILocation(line: 20, scope: !18) 268 !66 = !DILocation(line: 17, scope: !14, inlinedAt: !65) 269 !67 = !DILocalVariable(name: "this", arg: 1, flags: DIFlagArtificial | DIFlagObjectPointer, scope: !22, type: !25) 270 !68 = !DILocation(line: 0, scope: !22, inlinedAt: !66) 271 !69 = !DILocation(line: 8, scope: !22, inlinedAt: !66) 272 !70 = !DILocation(line: 9, scope: !41, inlinedAt: !66) 273 !71 = !DILocation(line: 9, scope: !46, inlinedAt: !66) 274 !72 = !DILocation(line: 21, scope: !19) 275 !73 = !DILocation(line: 22, scope: !20) 276
