1 ; REQUIRES: object-emission 2 3 ; RUN: %llc_dwarf -O0 -filetype=obj < %s | llvm-dwarfdump -v -debug-info - | FileCheck %s 4 5 ; Build from the following source with clang -O2. 6 7 ; The important details are that 'x's abstract definition is first built during 8 ; the definition of 'b', where the parameter to 'x' is constant and so 'x's 's' 9 ; variable is optimized away. No abstract definition DIE for 's' is constructed. 10 ; Then, during 'a' emission, the abstract DbgVariable for 's' is created, but 11 ; the abstract DIE isn't (since the abstract definition for 'b' is already 12 ; built). This results in 's' inlined in 'a' being emitted with its name, line, 13 ; file there, rather than referencing an abstract definition. 14 15 ; extern int t; 16 ; 17 ; void f(int); 18 ; 19 ; inline void x(bool b) { 20 ; if (b) { 21 ; int s = t; 22 ; f(s); 23 ; } 24 ; f(0); 25 ; } 26 ; 27 ; void b() { 28 ; x(false); 29 ; } 30 ; 31 ; void a(bool u) { 32 ; x(u); 33 ; } 34 35 ; CHECK: [[X_DECL:.*]]: DW_TAG_subprogram 36 ; CHECK-NOT: DW_TAG 37 ; CHECK: DW_AT_name {{.*}} "x" 38 ; CHECK-NOT: {{DW_TAG|NULL}} 39 ; CHECK: DW_TAG_formal_parameter 40 ; CHECK-NOT: DW_TAG 41 ; CHECK: DW_AT_name {{.*}} "b" 42 ; CHECK-NOT: {{DW_TAG|NULL}} 43 ; CHECK: DW_TAG_lexical_block 44 ; CHECK-NOT: {{DW_TAG|NULL}} 45 ; CHECK: DW_TAG_variable 46 ; CHECK-NOT: DW_TAG 47 ; CHECK: DW_AT_name {{.*}} "s" 48 49 ; CHECK: DW_TAG_subprogram 50 ; CHECK-NOT: DW_TAG 51 ; CHECK: DW_AT_name {{.*}} "b" 52 ; CHECK-NOT: {{DW_TAG|NULL}} 53 ; CHECK: DW_TAG_inlined_subroutine 54 ; CHECK-NOT: DW_TAG 55 ; CHECK: DW_AT_abstract_origin {{.*}} {[[X_DECL]]} 56 ; CHECK-NOT: {{DW_TAG|NULL}} 57 ; CHECK: DW_TAG_formal_parameter 58 ; CHECK-NOT: DW_TAG 59 ; CHECK: DW_AT_abstract_origin {{.*}} "b" 60 ; Notice 'x's local variable 's' is missing. Not necessarily a bug here, 61 ; since it's been optimized entirely away and it should be described in 62 ; abstract subprogram. 63 ; CHECK-NOT: DW_TAG 64 ; CHECK: NULL 65 ; CHECK-NOT: DW_TAG 66 ; CHECK: NULL 67 68 ; CHECK: DW_TAG_subprogram 69 ; CHECK-NOT: DW_TAG 70 ; CHECK: DW_AT_name {{.*}} "a" 71 ; CHECK-NOT: {{DW_TAG|NULL}} 72 ; CHECK: DW_TAG_formal_parameter 73 ; CHECK-NOT: {{DW_TAG|NULL}} 74 ; CHECK: DW_TAG_inlined_subroutine 75 ; CHECK-NOT: DW_TAG 76 ; CHECK: DW_AT_abstract_origin {{.*}} {[[X_DECL]]} 77 ; CHECK-NOT: {{DW_TAG|NULL}} 78 ; FIXME: This formal parameter goes missing at least at -O2 (& on 79 ; mips/powerpc), maybe before that. Perhaps SelectionDAG is to blame (and 80 ; fastisel succeeds). 81 ; CHECK: DW_TAG_formal_parameter 82 ; CHECK-NOT: DW_TAG 83 ; CHECK: DW_AT_abstract_origin {{.*}} "b" 84 85 ; CHECK-NOT: {{DW_TAG|NULL}} 86 ; CHECK: DW_TAG_lexical_block 87 ; CHECK-NOT: {{DW_TAG|NULL}} 88 ; CHECK: DW_TAG_variable 89 ; CHECK-NOT: DW_TAG 90 ; CHECK: DW_AT_abstract_origin {{.*}} "s" 91 92 @t = external global i32 93 94 ; Function Attrs: uwtable 95 define void @_Z1bv() #0 !dbg !4 { 96 entry: 97 tail call void @llvm.dbg.value(metadata i1 false, metadata !25, metadata !DIExpression()), !dbg !27 98 tail call void @_Z1fi(i32 0), !dbg !28 99 ret void, !dbg !29 100 } 101 102 ; Function Attrs: uwtable 103 define void @_Z1ab(i1 zeroext %u) #0 !dbg !8 { 104 entry: 105 tail call void @llvm.dbg.value(metadata i1 %u, metadata !13, metadata !DIExpression()), !dbg !30 106 tail call void @llvm.dbg.value(metadata i1 %u, metadata !31, metadata !DIExpression()), !dbg !33 107 br i1 %u, label %if.then.i, label %_Z1xb.exit, !dbg !34 108 109 if.then.i: ; preds = %entry 110 %0 = load i32, i32* @t, align 4, !dbg !35, !tbaa !36 111 tail call void @llvm.dbg.value(metadata i32 %0, metadata !40, metadata !DIExpression()), !dbg !35 112 tail call void @_Z1fi(i32 %0), !dbg !41 113 br label %_Z1xb.exit, !dbg !42 114 115 _Z1xb.exit: ; preds = %entry, %if.then.i 116 tail call void @_Z1fi(i32 0), !dbg !43 117 ret void, !dbg !44 118 } 119 120 declare void @_Z1fi(i32) #1 121 122 ; Function Attrs: nounwind readnone 123 declare void @llvm.dbg.value(metadata, metadata, metadata) #2 124 125 attributes #0 = { uwtable "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" } 126 attributes #1 = { "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" } 127 attributes #2 = { nounwind readnone } 128 129 !llvm.dbg.cu = !{!0} 130 !llvm.module.flags = !{!21, !22} 131 !llvm.ident = !{!23} 132 133 !0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, producer: "clang version 3.5.0 ", isOptimized: true, emissionKind: FullDebug, file: !1, enums: !2, retainedTypes: !2, globals: !2, imports: !2) 134 !1 = !DIFile(filename: "missing-abstract-variables.cc", directory: "/tmp/dbginfo") 135 !2 = !{} 136 !4 = distinct !DISubprogram(name: "b", linkageName: "_Z1bv", line: 13, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, unit: !0, scopeLine: 13, file: !1, scope: !5, type: !6, retainedNodes: !2) 137 !5 = !DIFile(filename: "missing-abstract-variables.cc", directory: "/tmp/dbginfo") 138 !6 = !DISubroutineType(types: !7) 139 !7 = !{null} 140 !8 = distinct !DISubprogram(name: "a", linkageName: "_Z1ab", line: 17, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, unit: !0, scopeLine: 17, file: !1, scope: !5, type: !9, retainedNodes: !12) 141 !9 = !DISubroutineType(types: !10) 142 !10 = !{null, !11} 143 !11 = !DIBasicType(tag: DW_TAG_base_type, name: "bool", size: 8, align: 8, encoding: DW_ATE_boolean) 144 !12 = !{!13} 145 !13 = !DILocalVariable(name: "u", line: 17, arg: 1, scope: !8, file: !5, type: !11) 146 !14 = distinct !DISubprogram(name: "x", linkageName: "_Z1xb", line: 5, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, unit: !0, scopeLine: 5, file: !1, scope: !5, type: !9, retainedNodes: !15) 147 !15 = !{!16, !17} 148 !16 = !DILocalVariable(name: "b", line: 5, arg: 1, scope: !14, file: !5, type: !11) 149 !17 = !DILocalVariable(name: "s", line: 7, scope: !18, file: !5, type: !20) 150 !18 = distinct !DILexicalBlock(line: 6, column: 0, file: !1, scope: !19) 151 !19 = distinct !DILexicalBlock(line: 6, column: 0, file: !1, scope: !14) 152 !20 = !DIBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed) 153 !21 = !{i32 2, !"Dwarf Version", i32 4} 154 !22 = !{i32 2, !"Debug Info Version", i32 3} 155 !23 = !{!"clang version 3.5.0 "} 156 !24 = !{i1 false} 157 !25 = !DILocalVariable(name: "b", line: 5, arg: 1, scope: !14, file: !5, type: !11) 158 !26 = !DILocation(line: 14, scope: !4) 159 !27 = !DILocation(line: 5, scope: !14, inlinedAt: !26) 160 !28 = !DILocation(line: 10, scope: !14, inlinedAt: !26) 161 !29 = !DILocation(line: 15, scope: !4) 162 !30 = !DILocation(line: 17, scope: !8) 163 !31 = !DILocalVariable(name: "b", line: 5, arg: 1, scope: !14, file: !5, type: !11) 164 !32 = !DILocation(line: 18, scope: !8) 165 !33 = !DILocation(line: 5, scope: !14, inlinedAt: !32) 166 !34 = !DILocation(line: 6, scope: !19, inlinedAt: !32) 167 !35 = !DILocation(line: 7, scope: !18, inlinedAt: !32) 168 !36 = !{!37, !37, i64 0} 169 !37 = !{!"int", !38, i64 0} 170 !38 = !{!"omnipotent char", !39, i64 0} 171 !39 = !{!"Simple C/C++ TBAA"} 172 !40 = !DILocalVariable(name: "s", line: 7, scope: !18, file: !5, type: !20) 173 !41 = !DILocation(line: 8, scope: !18, inlinedAt: !32) 174 !42 = !DILocation(line: 9, scope: !18, inlinedAt: !32) 175 !43 = !DILocation(line: 10, scope: !14, inlinedAt: !32) 176 !44 = !DILocation(line: 19, scope: !8) 177
