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      1 ; RUN: llc -split-dwarf=Enable -O0 %s -mtriple=x86_64-unknown-linux-gnu -filetype=obj -o %t
      2 ; RUN: llvm-dwarfdump -debug-dump=all %t | FileCheck %s
      3 
      4 ; Based on the debuginfo-tests/sret.cpp code.
      5 
      6 ; CHECK: DW_AT_GNU_dwo_id [DW_FORM_data8] (0x51ac5644b1937aa1)
      7 ; CHECK: DW_AT_GNU_dwo_id [DW_FORM_data8] (0x51ac5644b1937aa1)
      8 
      9 %class.A = type { i32 (...)**, i32 }
     10 %class.B = type { i8 }
     11 
     12 @_ZTV1A = linkonce_odr unnamed_addr constant [4 x i8*] [i8* null, i8* bitcast ({ i8*, i8* }* @_ZTI1A to i8*), i8* bitcast (void (%class.A*)* @_ZN1AD2Ev to i8*), i8* bitcast (void (%class.A*)* @_ZN1AD0Ev to i8*)]
     13 @_ZTVN10__cxxabiv117__class_type_infoE = external global i8*
     14 @_ZTS1A = linkonce_odr constant [3 x i8] c"1A\00"
     15 @_ZTI1A = linkonce_odr constant { i8*, i8* } { i8* bitcast (i8** getelementptr inbounds (i8*, i8** @_ZTVN10__cxxabiv117__class_type_infoE, i64 2) to i8*), i8* getelementptr inbounds ([3 x i8], [3 x i8]* @_ZTS1A, i32 0, i32 0) }
     16 
     17 @_ZN1AC1Ei = alias void (%class.A*, i32), void (%class.A*, i32)* @_ZN1AC2Ei
     18 @_ZN1AC1ERKS_ = alias void (%class.A*, %class.A*), void (%class.A*, %class.A*)* @_ZN1AC2ERKS_
     19 
     20 ; Function Attrs: nounwind uwtable
     21 define void @_ZN1AC2Ei(%class.A* %this, i32 %i) unnamed_addr #0 align 2 !dbg !49 {
     22 entry:
     23   %this.addr = alloca %class.A*, align 8
     24   %i.addr = alloca i32, align 4
     25   store %class.A* %this, %class.A** %this.addr, align 8
     26   call void @llvm.dbg.declare(metadata %class.A** %this.addr, metadata !67, metadata !DIExpression()), !dbg !69
     27   store i32 %i, i32* %i.addr, align 4
     28   call void @llvm.dbg.declare(metadata i32* %i.addr, metadata !70, metadata !DIExpression()), !dbg !71
     29   %this1 = load %class.A*, %class.A** %this.addr
     30   %0 = bitcast %class.A* %this1 to i8***, !dbg !72
     31   store i8** getelementptr inbounds ([4 x i8*], [4 x i8*]* @_ZTV1A, i64 0, i64 2), i8*** %0, !dbg !72
     32   %m_int = getelementptr inbounds %class.A, %class.A* %this1, i32 0, i32 1, !dbg !72
     33   %1 = load i32, i32* %i.addr, align 4, !dbg !72
     34   store i32 %1, i32* %m_int, align 4, !dbg !72
     35   ret void, !dbg !73
     36 }
     37 
     38 ; Function Attrs: nounwind readnone
     39 declare void @llvm.dbg.declare(metadata, metadata, metadata) #1
     40 
     41 ; Function Attrs: nounwind uwtable
     42 define void @_ZN1AC2ERKS_(%class.A* %this, %class.A* %rhs) unnamed_addr #0 align 2 !dbg !50 {
     43 entry:
     44   %this.addr = alloca %class.A*, align 8
     45   %rhs.addr = alloca %class.A*, align 8
     46   store %class.A* %this, %class.A** %this.addr, align 8
     47   call void @llvm.dbg.declare(metadata %class.A** %this.addr, metadata !74, metadata !DIExpression()), !dbg !75
     48   store %class.A* %rhs, %class.A** %rhs.addr, align 8
     49   call void @llvm.dbg.declare(metadata %class.A** %rhs.addr, metadata !76, metadata !DIExpression()), !dbg !77
     50   %this1 = load %class.A*, %class.A** %this.addr
     51   %0 = bitcast %class.A* %this1 to i8***, !dbg !78
     52   store i8** getelementptr inbounds ([4 x i8*], [4 x i8*]* @_ZTV1A, i64 0, i64 2), i8*** %0, !dbg !78
     53   %m_int = getelementptr inbounds %class.A, %class.A* %this1, i32 0, i32 1, !dbg !78
     54   %1 = load %class.A*, %class.A** %rhs.addr, align 8, !dbg !78
     55   %m_int2 = getelementptr inbounds %class.A, %class.A* %1, i32 0, i32 1, !dbg !78
     56   %2 = load i32, i32* %m_int2, align 4, !dbg !78
     57   store i32 %2, i32* %m_int, align 4, !dbg !78
     58   ret void, !dbg !79
     59 }
     60 
     61 ; Function Attrs: nounwind uwtable
     62 define %class.A* @_ZN1AaSERKS_(%class.A* %this, %class.A* %rhs) #0 align 2 !dbg !51 {
     63 entry:
     64   %this.addr = alloca %class.A*, align 8
     65   %rhs.addr = alloca %class.A*, align 8
     66   store %class.A* %this, %class.A** %this.addr, align 8
     67   call void @llvm.dbg.declare(metadata %class.A** %this.addr, metadata !80, metadata !DIExpression()), !dbg !81
     68   store %class.A* %rhs, %class.A** %rhs.addr, align 8
     69   call void @llvm.dbg.declare(metadata %class.A** %rhs.addr, metadata !82, metadata !DIExpression()), !dbg !83
     70   %this1 = load %class.A*, %class.A** %this.addr
     71   %0 = load %class.A*, %class.A** %rhs.addr, align 8, !dbg !84
     72   %m_int = getelementptr inbounds %class.A, %class.A* %0, i32 0, i32 1, !dbg !84
     73   %1 = load i32, i32* %m_int, align 4, !dbg !84
     74   %m_int2 = getelementptr inbounds %class.A, %class.A* %this1, i32 0, i32 1, !dbg !84
     75   store i32 %1, i32* %m_int2, align 4, !dbg !84
     76   ret %class.A* %this1, !dbg !85
     77 }
     78 
     79 ; Function Attrs: nounwind uwtable
     80 define i32 @_ZN1A7get_intEv(%class.A* %this) #0 align 2 !dbg !52 {
     81 entry:
     82   %this.addr = alloca %class.A*, align 8
     83   store %class.A* %this, %class.A** %this.addr, align 8
     84   call void @llvm.dbg.declare(metadata %class.A** %this.addr, metadata !86, metadata !DIExpression()), !dbg !87
     85   %this1 = load %class.A*, %class.A** %this.addr
     86   %m_int = getelementptr inbounds %class.A, %class.A* %this1, i32 0, i32 1, !dbg !88
     87   %0 = load i32, i32* %m_int, align 4, !dbg !88
     88   ret i32 %0, !dbg !88
     89 }
     90 
     91 ; Function Attrs: uwtable
     92 define void @_ZN1B9AInstanceEv(%class.A* noalias sret %agg.result, %class.B* %this) #2 align 2 !dbg !53 {
     93 entry:
     94   %this.addr = alloca %class.B*, align 8
     95   %nrvo = alloca i1
     96   %cleanup.dest.slot = alloca i32
     97   store %class.B* %this, %class.B** %this.addr, align 8
     98   call void @llvm.dbg.declare(metadata %class.B** %this.addr, metadata !89, metadata !DIExpression()), !dbg !91
     99   %this1 = load %class.B*, %class.B** %this.addr
    100   store i1 false, i1* %nrvo, !dbg !92
    101   call void @llvm.dbg.declare(metadata %class.A* %agg.result, metadata !93, metadata !DIExpression(DW_OP_deref)), !dbg !92
    102   call void @_ZN1AC1Ei(%class.A* %agg.result, i32 12), !dbg !92
    103   store i1 true, i1* %nrvo, !dbg !94
    104   store i32 1, i32* %cleanup.dest.slot
    105   %nrvo.val = load i1, i1* %nrvo, !dbg !95
    106   br i1 %nrvo.val, label %nrvo.skipdtor, label %nrvo.unused, !dbg !95
    107 
    108 nrvo.unused:                                      ; preds = %entry
    109   call void @_ZN1AD2Ev(%class.A* %agg.result), !dbg !96
    110   br label %nrvo.skipdtor, !dbg !96
    111 
    112 nrvo.skipdtor:                                    ; preds = %nrvo.unused, %entry
    113   ret void, !dbg !98
    114 }
    115 
    116 ; Function Attrs: nounwind uwtable
    117 define linkonce_odr void @_ZN1AD2Ev(%class.A* %this) unnamed_addr #0 align 2 !dbg !63 {
    118 entry:
    119   %this.addr = alloca %class.A*, align 8
    120   store %class.A* %this, %class.A** %this.addr, align 8
    121   call void @llvm.dbg.declare(metadata %class.A** %this.addr, metadata !101, metadata !DIExpression()), !dbg !102
    122   %this1 = load %class.A*, %class.A** %this.addr
    123   ret void, !dbg !103
    124 }
    125 
    126 ; Function Attrs: uwtable
    127 define i32 @main(i32 %argc, i8** %argv) #2 personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*) !dbg !54 {
    128 entry:
    129   %retval = alloca i32, align 4
    130   %argc.addr = alloca i32, align 4
    131   %argv.addr = alloca i8**, align 8
    132   %b = alloca %class.B, align 1
    133   %return_val = alloca i32, align 4
    134   %temp.lvalue = alloca %class.A, align 8
    135   %exn.slot = alloca i8*
    136   %ehselector.slot = alloca i32
    137   %a = alloca %class.A, align 8
    138   %cleanup.dest.slot = alloca i32
    139   store i32 0, i32* %retval
    140   store i32 %argc, i32* %argc.addr, align 4
    141   call void @llvm.dbg.declare(metadata i32* %argc.addr, metadata !104, metadata !DIExpression()), !dbg !105
    142   store i8** %argv, i8*** %argv.addr, align 8
    143   call void @llvm.dbg.declare(metadata i8*** %argv.addr, metadata !106, metadata !DIExpression()), !dbg !105
    144   call void @llvm.dbg.declare(metadata %class.B* %b, metadata !107, metadata !DIExpression()), !dbg !108
    145   call void @_ZN1BC2Ev(%class.B* %b), !dbg !108
    146   call void @llvm.dbg.declare(metadata i32* %return_val, metadata !109, metadata !DIExpression()), !dbg !110
    147   call void @_ZN1B9AInstanceEv(%class.A* sret %temp.lvalue, %class.B* %b), !dbg !110
    148   %call = invoke i32 @_ZN1A7get_intEv(%class.A* %temp.lvalue)
    149           to label %invoke.cont unwind label %lpad, !dbg !110
    150 
    151 invoke.cont:                                      ; preds = %entry
    152   call void @_ZN1AD2Ev(%class.A* %temp.lvalue), !dbg !111
    153   store i32 %call, i32* %return_val, align 4, !dbg !111
    154   call void @llvm.dbg.declare(metadata %class.A* %a, metadata !113, metadata !DIExpression()), !dbg !114
    155   call void @_ZN1B9AInstanceEv(%class.A* sret %a, %class.B* %b), !dbg !114
    156   %0 = load i32, i32* %return_val, align 4, !dbg !115
    157   store i32 %0, i32* %retval, !dbg !115
    158   store i32 1, i32* %cleanup.dest.slot
    159   call void @_ZN1AD2Ev(%class.A* %a), !dbg !116
    160   %1 = load i32, i32* %retval, !dbg !116
    161   ret i32 %1, !dbg !116
    162 
    163 lpad:                                             ; preds = %entry
    164   %2 = landingpad { i8*, i32 }
    165           cleanup, !dbg !116
    166   %3 = extractvalue { i8*, i32 } %2, 0, !dbg !116
    167   store i8* %3, i8** %exn.slot, !dbg !116
    168   %4 = extractvalue { i8*, i32 } %2, 1, !dbg !116
    169   store i32 %4, i32* %ehselector.slot, !dbg !116
    170   invoke void @_ZN1AD2Ev(%class.A* %temp.lvalue)
    171           to label %invoke.cont1 unwind label %terminate.lpad, !dbg !116
    172 
    173 invoke.cont1:                                     ; preds = %lpad
    174   br label %eh.resume, !dbg !117
    175 
    176 eh.resume:                                        ; preds = %invoke.cont1
    177   %exn = load i8*, i8** %exn.slot, !dbg !119
    178   %sel = load i32, i32* %ehselector.slot, !dbg !119
    179   %lpad.val = insertvalue { i8*, i32 } undef, i8* %exn, 0, !dbg !119
    180   %lpad.val2 = insertvalue { i8*, i32 } %lpad.val, i32 %sel, 1, !dbg !119
    181   resume { i8*, i32 } %lpad.val2, !dbg !119
    182 
    183 terminate.lpad:                                   ; preds = %lpad
    184   %5 = landingpad { i8*, i32 }
    185           catch i8* null, !dbg !121
    186   %6 = extractvalue { i8*, i32 } %5, 0, !dbg !121
    187   call void @__clang_call_terminate(i8* %6) #5, !dbg !121
    188   unreachable, !dbg !121
    189 }
    190 
    191 ; Function Attrs: nounwind uwtable
    192 define linkonce_odr void @_ZN1BC2Ev(%class.B* %this) unnamed_addr #0 align 2 !dbg !62 {
    193 entry:
    194   %this.addr = alloca %class.B*, align 8
    195   store %class.B* %this, %class.B** %this.addr, align 8
    196   call void @llvm.dbg.declare(metadata %class.B** %this.addr, metadata !123, metadata !DIExpression()), !dbg !124
    197   %this1 = load %class.B*, %class.B** %this.addr
    198   ret void, !dbg !125
    199 }
    200 
    201 declare i32 @__gxx_personality_v0(...)
    202 
    203 ; Function Attrs: noinline noreturn nounwind
    204 define linkonce_odr hidden void @__clang_call_terminate(i8*) #3 {
    205   %2 = call i8* @__cxa_begin_catch(i8* %0) #6
    206   call void @_ZSt9terminatev() #5
    207   unreachable
    208 }
    209 
    210 declare i8* @__cxa_begin_catch(i8*)
    211 
    212 declare void @_ZSt9terminatev()
    213 
    214 ; Function Attrs: uwtable
    215 define linkonce_odr void @_ZN1AD0Ev(%class.A* %this) unnamed_addr #2 align 2 personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*) !dbg !61 {
    216 entry:
    217   %this.addr = alloca %class.A*, align 8
    218   %exn.slot = alloca i8*
    219   %ehselector.slot = alloca i32
    220   store %class.A* %this, %class.A** %this.addr, align 8
    221   call void @llvm.dbg.declare(metadata %class.A** %this.addr, metadata !126, metadata !DIExpression()), !dbg !127
    222   %this1 = load %class.A*, %class.A** %this.addr
    223   invoke void @_ZN1AD2Ev(%class.A* %this1)
    224           to label %invoke.cont unwind label %lpad, !dbg !128
    225 
    226 invoke.cont:                                      ; preds = %entry
    227   %0 = bitcast %class.A* %this1 to i8*, !dbg !129
    228   call void @_ZdlPv(i8* %0) #7, !dbg !129
    229   ret void, !dbg !129
    230 
    231 lpad:                                             ; preds = %entry
    232   %1 = landingpad { i8*, i32 }
    233           cleanup, !dbg !131
    234   %2 = extractvalue { i8*, i32 } %1, 0, !dbg !131
    235   store i8* %2, i8** %exn.slot, !dbg !131
    236   %3 = extractvalue { i8*, i32 } %1, 1, !dbg !131
    237   store i32 %3, i32* %ehselector.slot, !dbg !131
    238   %4 = bitcast %class.A* %this1 to i8*, !dbg !131
    239   call void @_ZdlPv(i8* %4) #7, !dbg !131
    240   br label %eh.resume, !dbg !131
    241 
    242 eh.resume:                                        ; preds = %lpad
    243   %exn = load i8*, i8** %exn.slot, !dbg !133
    244   %sel = load i32, i32* %ehselector.slot, !dbg !133
    245   %lpad.val = insertvalue { i8*, i32 } undef, i8* %exn, 0, !dbg !133
    246   %lpad.val2 = insertvalue { i8*, i32 } %lpad.val, i32 %sel, 1, !dbg !133
    247   resume { i8*, i32 } %lpad.val2, !dbg !133
    248 }
    249 
    250 ; Function Attrs: nobuiltin nounwind
    251 declare void @_ZdlPv(i8*) #4
    252 
    253 attributes #0 = { nounwind uwtable "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" }
    254 attributes #1 = { nounwind readnone }
    255 attributes #2 = { uwtable "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" }
    256 attributes #3 = { noinline noreturn nounwind }
    257 attributes #4 = { nobuiltin 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" }
    258 attributes #5 = { noreturn nounwind }
    259 attributes #6 = { nounwind }
    260 attributes #7 = { builtin nounwind }
    261 
    262 !llvm.dbg.cu = !{!0}
    263 !llvm.module.flags = !{!64, !65}
    264 !llvm.ident = !{!66}
    265 
    266 !0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, producer: "clang version 3.5.0 (trunk 203283) (llvm/trunk 203307)", isOptimized: false, splitDebugFilename: "sret.dwo", emissionKind: FullDebug, file: !1, enums: !2, retainedTypes: !3, globals: !2, imports: !2)
    267 !1 = !DIFile(filename: "sret.cpp", directory: "/usr/local/google/home/echristo/tmp")
    268 !2 = !{}
    269 !3 = !{!4, !37}
    270 !4 = !DICompositeType(tag: DW_TAG_class_type, name: "A", line: 1, size: 128, align: 64, file: !1, elements: !5, vtableHolder: !4, identifier: "_ZTS1A")
    271 !5 = !{!6, !13, !14, !19, !25, !29, !33}
    272 !6 = !DIDerivedType(tag: DW_TAG_member, name: "_vptr$A", size: 64, flags: DIFlagArtificial, file: !1, scope: !7, baseType: !8)
    273 !7 = !DIFile(filename: "sret.cpp", directory: "/usr/local/google/home/echristo/tmp")
    274 !8 = !DIDerivedType(tag: DW_TAG_pointer_type, size: 64, baseType: !9)
    275 !9 = !DIDerivedType(tag: DW_TAG_pointer_type, name: "__vtbl_ptr_type", size: 64, baseType: !10)
    276 !10 = !DISubroutineType(types: !11)
    277 !11 = !{!12}
    278 !12 = !DIBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
    279 !13 = !DIDerivedType(tag: DW_TAG_member, name: "m_int", line: 13, size: 32, align: 32, offset: 64, flags: DIFlagProtected, file: !1, scope: !4, baseType: !12)
    280 !14 = !DISubprogram(name: "A", line: 4, isLocal: false, isDefinition: false, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, scopeLine: 4, file: !1, scope: !4, type: !15)
    281 !15 = !DISubroutineType(types: !16)
    282 !16 = !{null, !17, !12}
    283 !17 = !DIDerivedType(tag: DW_TAG_pointer_type, size: 64, align: 64, flags: DIFlagArtificial | DIFlagObjectPointer, baseType: !4)
    284 !19 = !DISubprogram(name: "A", line: 5, isLocal: false, isDefinition: false, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, scopeLine: 5, file: !1, scope: !4, type: !20)
    285 !20 = !DISubroutineType(types: !21)
    286 !21 = !{null, !17, !22}
    287 !22 = !DIDerivedType(tag: DW_TAG_reference_type, size: 64, align: 64, baseType: !23)
    288 !23 = !DIDerivedType(tag: DW_TAG_const_type, baseType: !4)
    289 !25 = !DISubprogram(name: "operator=", linkageName: "_ZN1AaSERKS_", line: 7, isLocal: false, isDefinition: false, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, scopeLine: 7, file: !1, scope: !4, type: !26)
    290 !26 = !DISubroutineType(types: !27)
    291 !27 = !{!22, !17, !22}
    292 !29 = !DISubprogram(name: "~A", line: 8, isLocal: false, isDefinition: false, virtuality: DW_VIRTUALITY_virtual, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, scopeLine: 8, file: !1, scope: !4, type: !30, containingType: !4)
    293 !30 = !DISubroutineType(types: !31)
    294 !31 = !{null, !17}
    295 !33 = !DISubprogram(name: "get_int", linkageName: "_ZN1A7get_intEv", line: 10, isLocal: false, isDefinition: false, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, scopeLine: 10, file: !1, scope: !4, type: !34)
    296 !34 = !DISubroutineType(types: !35)
    297 !35 = !{!12, !17}
    298 !37 = !DICompositeType(tag: DW_TAG_class_type, name: "B", line: 38, size: 8, align: 8, file: !1, elements: !38, identifier: "_ZTS1B")
    299 !38 = !{!39, !44}
    300 !39 = !DISubprogram(name: "B", line: 41, isLocal: false, isDefinition: false, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, scopeLine: 41, file: !1, scope: !37, type: !40)
    301 !40 = !DISubroutineType(types: !41)
    302 !41 = !{null, !42}
    303 !42 = !DIDerivedType(tag: DW_TAG_pointer_type, size: 64, align: 64, flags: DIFlagArtificial | DIFlagObjectPointer, baseType: !37)
    304 !44 = !DISubprogram(name: "AInstance", linkageName: "_ZN1B9AInstanceEv", line: 43, isLocal: false, isDefinition: false, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, scopeLine: 43, file: !1, scope: !37, type: !45)
    305 !45 = !DISubroutineType(types: !46)
    306 !46 = !{!4, !42}
    307 !49 = distinct !DISubprogram(name: "A", linkageName: "_ZN1AC2Ei", line: 16, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, unit: !0, scopeLine: 18, file: !1, scope: !4, type: !15, declaration: !14, variables: !2)
    308 !50 = distinct !DISubprogram(name: "A", linkageName: "_ZN1AC2ERKS_", line: 21, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, unit: !0, scopeLine: 23, file: !1, scope: !4, type: !20, declaration: !19, variables: !2)
    309 !51 = distinct !DISubprogram(name: "operator=", linkageName: "_ZN1AaSERKS_", line: 27, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, unit: !0, scopeLine: 28, file: !1, scope: !4, type: !26, declaration: !25, variables: !2)
    310 !52 = distinct !DISubprogram(name: "get_int", linkageName: "_ZN1A7get_intEv", line: 33, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, unit: !0, scopeLine: 34, file: !1, scope: !4, type: !34, declaration: !33, variables: !2)
    311 !53 = distinct !DISubprogram(name: "AInstance", linkageName: "_ZN1B9AInstanceEv", line: 47, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, unit: !0, scopeLine: 48, file: !1, scope: !37, type: !45, declaration: !44, variables: !2)
    312 !54 = distinct !DISubprogram(name: "main", line: 53, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, unit: !0, scopeLine: 54, file: !1, scope: !7, type: !55, variables: !2)
    313 !55 = !DISubroutineType(types: !56)
    314 !56 = !{!12, !12, !57}
    315 !57 = !DIDerivedType(tag: DW_TAG_pointer_type, size: 64, align: 64, baseType: !58)
    316 !58 = !DIDerivedType(tag: DW_TAG_pointer_type, size: 64, align: 64, baseType: !59)
    317 !59 = !DIDerivedType(tag: DW_TAG_const_type, baseType: !60)
    318 !60 = !DIBasicType(tag: DW_TAG_base_type, name: "char", size: 8, align: 8, encoding: DW_ATE_signed_char)
    319 !61 = distinct !DISubprogram(name: "~A", linkageName: "_ZN1AD0Ev", line: 8, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, unit: !0, scopeLine: 8, file: !1, scope: !4, type: !30, declaration: !29, variables: !2)
    320 !62 = distinct !DISubprogram(name: "B", linkageName: "_ZN1BC2Ev", line: 41, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, unit: !0, scopeLine: 41, file: !1, scope: !37, type: !40, declaration: !39, variables: !2)
    321 !63 = distinct !DISubprogram(name: "~A", linkageName: "_ZN1AD2Ev", line: 8, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, unit: !0, scopeLine: 8, file: !1, scope: !4, type: !30, declaration: !29, variables: !2)
    322 !64 = !{i32 2, !"Dwarf Version", i32 4}
    323 !65 = !{i32 1, !"Debug Info Version", i32 3}
    324 !66 = !{!"clang version 3.5.0 (trunk 203283) (llvm/trunk 203307)"}
    325 !67 = !DILocalVariable(name: "this", arg: 1, flags: DIFlagArtificial | DIFlagObjectPointer, scope: !49, type: !68)
    326 !68 = !DIDerivedType(tag: DW_TAG_pointer_type, size: 64, align: 64, baseType: !4)
    327 !69 = !DILocation(line: 0, scope: !49)
    328 !70 = !DILocalVariable(name: "i", line: 16, arg: 2, scope: !49, file: !7, type: !12)
    329 !71 = !DILocation(line: 16, scope: !49)
    330 !72 = !DILocation(line: 18, scope: !49)
    331 !73 = !DILocation(line: 19, scope: !49)
    332 !74 = !DILocalVariable(name: "this", arg: 1, flags: DIFlagArtificial | DIFlagObjectPointer, scope: !50, type: !68)
    333 !75 = !DILocation(line: 0, scope: !50)
    334 !76 = !DILocalVariable(name: "rhs", line: 21, arg: 2, scope: !50, file: !7, type: !22)
    335 !77 = !DILocation(line: 21, scope: !50)
    336 !78 = !DILocation(line: 23, scope: !50)
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    339 !81 = !DILocation(line: 0, scope: !51)
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    341 !83 = !DILocation(line: 27, scope: !51)
    342 !84 = !DILocation(line: 29, scope: !51)
    343 !85 = !DILocation(line: 30, scope: !51)
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    345 !87 = !DILocation(line: 0, scope: !52)
    346 !88 = !DILocation(line: 35, scope: !52)
    347 !89 = !DILocalVariable(name: "this", arg: 1, flags: DIFlagArtificial | DIFlagObjectPointer, scope: !53, type: !90)
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    349 !91 = !DILocation(line: 0, scope: !53)
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    351 !93 = !DILocalVariable(name: "a", line: 49, scope: !53, file: !7, type: !4)
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    353 !95 = !DILocation(line: 51, scope: !53)
    354 !96 = !DILocation(line: 51, scope: !97)
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    356 !98 = !DILocation(line: 51, scope: !99)
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    358 !100 = distinct !DILexicalBlock(line: 51, column: 0, file: !1, scope: !53)
    359 !101 = !DILocalVariable(name: "this", arg: 1, flags: DIFlagArtificial | DIFlagObjectPointer, scope: !63, type: !68)
    360 !102 = !DILocation(line: 0, scope: !63)
    361 !103 = !DILocation(line: 8, scope: !63)
    362 !104 = !DILocalVariable(name: "argc", line: 53, arg: 1, scope: !54, file: !7, type: !12)
    363 !105 = !DILocation(line: 53, scope: !54)
    364 !106 = !DILocalVariable(name: "argv", line: 53, arg: 2, scope: !54, file: !7, type: !57)
    365 !107 = !DILocalVariable(name: "b", line: 55, scope: !54, file: !7, type: !37)
    366 !108 = !DILocation(line: 55, scope: !54)
    367 !109 = !DILocalVariable(name: "return_val", line: 56, scope: !54, file: !7, type: !12)
    368 !110 = !DILocation(line: 56, scope: !54)
    369 !111 = !DILocation(line: 56, scope: !112)
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    371 !113 = !DILocalVariable(name: "a", line: 58, scope: !54, file: !7, type: !4)
    372 !114 = !DILocation(line: 58, scope: !54)
    373 !115 = !DILocation(line: 59, scope: !54)
    374 !116 = !DILocation(line: 60, scope: !54)
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    382 !124 = !DILocation(line: 0, scope: !62)
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    385 !127 = !DILocation(line: 0, scope: !61)
    386 !128 = !DILocation(line: 8, scope: !61)
    387 !129 = !DILocation(line: 8, scope: !130)
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    389 !131 = !DILocation(line: 8, scope: !132)
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    391 !133 = !DILocation(line: 8, scope: !134)
    392 !134 = distinct !DILexicalBlock(line: 8, column: 0, file: !1, scope: !61)
    393