1 ; REQUIRES: object-emission 2 3 ; RUN: %llc_dwarf -O0 -filetype=obj < %s | llvm-dwarfdump -debug-dump=info - | FileCheck %s 4 5 ; The formal parameter 'b' for Function 'x' when inlined within 'a' is lost on 6 ; mips and powerpc64 (and on x86_64 at at least -O2). Presumably this is a 7 ; SelectionDAG issue (do mips/powerpc64 use FastISel?). 8 ; XFAIL: mips, powerpc64, s390x, sparc 9 10 ; Build from the following source with clang -O2. 11 12 ; The important details are that 'x's abstract definition is first built during 13 ; the definition of 'b', where the parameter to 'x' is constant and so 'x's 's' 14 ; variable is optimized away. No abstract definition DIE for 's' is constructed. 15 ; Then, during 'a' emission, the abstract DbgVariable for 's' is created, but 16 ; the abstract DIE isn't (since the abstract definition for 'b' is already 17 ; built). This results in 's' inlined in 'a' being emitted with its name, line, 18 ; file there, rather than referencing an abstract definition. 19 20 ; extern int t; 21 ; 22 ; void f(int); 23 ; 24 ; inline void x(bool b) { 25 ; if (b) { 26 ; int s = t; 27 ; f(s); 28 ; } 29 ; f(0); 30 ; } 31 ; 32 ; void b() { 33 ; x(false); 34 ; } 35 ; 36 ; void a(bool u) { 37 ; x(u); 38 ; } 39 40 ; CHECK: [[X_DECL:.*]]: DW_TAG_subprogram 41 ; CHECK-NOT: DW_TAG 42 ; CHECK: DW_AT_name {{.*}} "x" 43 ; CHECK-NOT: {{DW_TAG|NULL}} 44 ; CHECK: DW_TAG_formal_parameter 45 ; CHECK-NOT: DW_TAG 46 ; CHECK: DW_AT_name {{.*}} "b" 47 ; CHECK-NOT: {{DW_TAG|NULL}} 48 ; CHECK: DW_TAG_lexical_block 49 ; CHECK-NOT: {{DW_TAG|NULL}} 50 ; CHECK: DW_TAG_variable 51 ; CHECK-NOT: DW_TAG 52 ; CHECK: DW_AT_name {{.*}} "s" 53 54 ; CHECK: DW_TAG_subprogram 55 ; CHECK-NOT: DW_TAG 56 ; CHECK: DW_AT_name {{.*}} "b" 57 ; CHECK-NOT: {{DW_TAG|NULL}} 58 ; CHECK: DW_TAG_inlined_subroutine 59 ; CHECK-NOT: DW_TAG 60 ; CHECK: DW_AT_abstract_origin {{.*}} {[[X_DECL]]} 61 ; CHECK-NOT: {{DW_TAG|NULL}} 62 ; CHECK: DW_TAG_formal_parameter 63 ; CHECK-NOT: DW_TAG 64 ; CHECK: DW_AT_abstract_origin {{.*}} "b" 65 ; Notice 'x's local variable 's' is missing. Not necessarily a bug here, 66 ; since it's been optimized entirely away and it should be described in 67 ; abstract subprogram. 68 ; CHECK-NOT: DW_TAG 69 ; CHECK: NULL 70 ; CHECK-NOT: DW_TAG 71 ; CHECK: NULL 72 73 ; CHECK: DW_TAG_subprogram 74 ; CHECK-NOT: DW_TAG 75 ; CHECK: DW_AT_name {{.*}} "a" 76 ; CHECK-NOT: {{DW_TAG|NULL}} 77 ; CHECK: DW_TAG_formal_parameter 78 ; CHECK-NOT: {{DW_TAG|NULL}} 79 ; CHECK: DW_TAG_inlined_subroutine 80 ; CHECK-NOT: DW_TAG 81 ; CHECK: DW_AT_abstract_origin {{.*}} {[[X_DECL]]} 82 ; CHECK-NOT: {{DW_TAG|NULL}} 83 ; FIXME: This formal parameter goes missing at least at -O2 (& on 84 ; mips/powerpc), maybe before that. Perhaps SelectionDAG is to blame (and 85 ; fastisel succeeds). 86 ; CHECK: DW_TAG_formal_parameter 87 ; CHECK-NOT: DW_TAG 88 ; CHECK: DW_AT_abstract_origin {{.*}} "b" 89 90 ; CHECK-NOT: {{DW_TAG|NULL}} 91 ; CHECK: DW_TAG_lexical_block 92 ; CHECK-NOT: {{DW_TAG|NULL}} 93 ; CHECK: DW_TAG_variable 94 ; CHECK-NOT: DW_TAG 95 ; CHECK: DW_AT_abstract_origin {{.*}} "s" 96 97 @t = external global i32 98 99 ; Function Attrs: uwtable 100 define void @_Z1bv() #0 !dbg !4 { 101 entry: 102 tail call void @llvm.dbg.value(metadata i1 false, i64 0, metadata !25, metadata !DIExpression()), !dbg !27 103 tail call void @_Z1fi(i32 0), !dbg !28 104 ret void, !dbg !29 105 } 106 107 ; Function Attrs: uwtable 108 define void @_Z1ab(i1 zeroext %u) #0 !dbg !8 { 109 entry: 110 tail call void @llvm.dbg.value(metadata i1 %u, i64 0, metadata !13, metadata !DIExpression()), !dbg !30 111 tail call void @llvm.dbg.value(metadata i1 %u, i64 0, metadata !31, metadata !DIExpression()), !dbg !33 112 br i1 %u, label %if.then.i, label %_Z1xb.exit, !dbg !34 113 114 if.then.i: ; preds = %entry 115 %0 = load i32, i32* @t, align 4, !dbg !35, !tbaa !36 116 tail call void @llvm.dbg.value(metadata i32 %0, i64 0, metadata !40, metadata !DIExpression()), !dbg !35 117 tail call void @_Z1fi(i32 %0), !dbg !41 118 br label %_Z1xb.exit, !dbg !42 119 120 _Z1xb.exit: ; preds = %entry, %if.then.i 121 tail call void @_Z1fi(i32 0), !dbg !43 122 ret void, !dbg !44 123 } 124 125 declare void @_Z1fi(i32) #1 126 127 ; Function Attrs: nounwind readnone 128 declare void @llvm.dbg.value(metadata, i64, metadata, metadata) #2 129 130 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" } 131 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" } 132 attributes #2 = { nounwind readnone } 133 134 !llvm.dbg.cu = !{!0} 135 !llvm.module.flags = !{!21, !22} 136 !llvm.ident = !{!23} 137 138 !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) 139 !1 = !DIFile(filename: "missing-abstract-variables.cc", directory: "/tmp/dbginfo") 140 !2 = !{} 141 !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, variables: !2) 142 !5 = !DIFile(filename: "missing-abstract-variables.cc", directory: "/tmp/dbginfo") 143 !6 = !DISubroutineType(types: !7) 144 !7 = !{null} 145 !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, variables: !12) 146 !9 = !DISubroutineType(types: !10) 147 !10 = !{null, !11} 148 !11 = !DIBasicType(tag: DW_TAG_base_type, name: "bool", size: 8, align: 8, encoding: DW_ATE_boolean) 149 !12 = !{!13} 150 !13 = !DILocalVariable(name: "u", line: 17, arg: 1, scope: !8, file: !5, type: !11) 151 !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, variables: !15) 152 !15 = !{!16, !17} 153 !16 = !DILocalVariable(name: "b", line: 5, arg: 1, scope: !14, file: !5, type: !11) 154 !17 = !DILocalVariable(name: "s", line: 7, scope: !18, file: !5, type: !20) 155 !18 = distinct !DILexicalBlock(line: 6, column: 0, file: !1, scope: !19) 156 !19 = distinct !DILexicalBlock(line: 6, column: 0, file: !1, scope: !14) 157 !20 = !DIBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed) 158 !21 = !{i32 2, !"Dwarf Version", i32 4} 159 !22 = !{i32 2, !"Debug Info Version", i32 3} 160 !23 = !{!"clang version 3.5.0 "} 161 !24 = !{i1 false} 162 !25 = !DILocalVariable(name: "b", line: 5, arg: 1, scope: !14, file: !5, type: !11) 163 !26 = !DILocation(line: 14, scope: !4) 164 !27 = !DILocation(line: 5, scope: !14, inlinedAt: !26) 165 !28 = !DILocation(line: 10, scope: !14, inlinedAt: !26) 166 !29 = !DILocation(line: 15, scope: !4) 167 !30 = !DILocation(line: 17, scope: !8) 168 !31 = !DILocalVariable(name: "b", line: 5, arg: 1, scope: !14, file: !5, type: !11) 169 !32 = !DILocation(line: 18, scope: !8) 170 !33 = !DILocation(line: 5, scope: !14, inlinedAt: !32) 171 !34 = !DILocation(line: 6, scope: !19, inlinedAt: !32) 172 !35 = !DILocation(line: 7, scope: !18, inlinedAt: !32) 173 !36 = !{!37, !37, i64 0} 174 !37 = !{!"int", !38, i64 0} 175 !38 = !{!"omnipotent char", !39, i64 0} 176 !39 = !{!"Simple C/C++ TBAA"} 177 !40 = !DILocalVariable(name: "s", line: 7, scope: !18, file: !5, type: !20) 178 !41 = !DILocation(line: 8, scope: !18, inlinedAt: !32) 179 !42 = !DILocation(line: 9, scope: !18, inlinedAt: !32) 180 !43 = !DILocation(line: 10, scope: !14, inlinedAt: !32) 181 !44 = !DILocation(line: 19, scope: !8) 182
