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 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: 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 {{.*}} "_Z1xb" 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 {{.*}} "_Z1xb" 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 100define void @_Z1bv() #0 { 101entry: 102 tail call void @llvm.dbg.value(metadata i1 false, i64 0, metadata !25, metadata !MDExpression()), !dbg !27 103 tail call void @_Z1fi(i32 0), !dbg !28 104 ret void, !dbg !29 105} 106 107; Function Attrs: uwtable 108define void @_Z1ab(i1 zeroext %u) #0 { 109entry: 110 tail call void @llvm.dbg.value(metadata i1 %u, i64 0, metadata !13, metadata !MDExpression()), !dbg !30 111 tail call void @llvm.dbg.value(metadata i1 %u, i64 0, metadata !31, metadata !MDExpression()), !dbg !33 112 br i1 %u, label %if.then.i, label %_Z1xb.exit, !dbg !34 113 114if.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 !MDExpression()), !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 125declare void @_Z1fi(i32) #1 126 127; Function Attrs: nounwind readnone 128declare void @llvm.dbg.value(metadata, i64, metadata, metadata) #2 129 130attributes #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" } 131attributes #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" } 132attributes #2 = { nounwind readnone } 133 134!llvm.dbg.cu = !{!0} 135!llvm.module.flags = !{!21, !22} 136!llvm.ident = !{!23} 137 138!0 = !MDCompileUnit(language: DW_LANG_C_plus_plus, producer: "clang version 3.5.0 ", isOptimized: true, emissionKind: 1, file: !1, enums: !2, retainedTypes: !2, subprograms: !3, globals: !2, imports: !2) 139!1 = !MDFile(filename: "missing-abstract-variables.cc", directory: "/tmp/dbginfo") 140!2 = !{} 141!3 = !{!4, !8, !14} 142!4 = !MDSubprogram(name: "b", linkageName: "_Z1bv", line: 13, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, scopeLine: 13, file: !1, scope: !5, type: !6, function: void ()* @_Z1bv, variables: !2) 143!5 = !MDFile(filename: "missing-abstract-variables.cc", directory: "/tmp/dbginfo") 144!6 = !MDSubroutineType(types: !7) 145!7 = !{null} 146!8 = !MDSubprogram(name: "a", linkageName: "_Z1ab", line: 17, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, scopeLine: 17, file: !1, scope: !5, type: !9, function: void (i1)* @_Z1ab, variables: !12) 147!9 = !MDSubroutineType(types: !10) 148!10 = !{null, !11} 149!11 = !MDBasicType(tag: DW_TAG_base_type, name: "bool", size: 8, align: 8, encoding: DW_ATE_boolean) 150!12 = !{!13} 151!13 = !MDLocalVariable(tag: DW_TAG_arg_variable, name: "u", line: 17, arg: 1, scope: !8, file: !5, type: !11) 152!14 = !MDSubprogram(name: "x", linkageName: "_Z1xb", line: 5, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, scopeLine: 5, file: !1, scope: !5, type: !9, variables: !15) 153!15 = !{!16, !17} 154!16 = !MDLocalVariable(tag: DW_TAG_arg_variable, name: "b", line: 5, arg: 1, scope: !14, file: !5, type: !11) 155!17 = !MDLocalVariable(tag: DW_TAG_auto_variable, name: "s", line: 7, scope: !18, file: !5, type: !20) 156!18 = distinct !MDLexicalBlock(line: 6, column: 0, file: !1, scope: !19) 157!19 = distinct !MDLexicalBlock(line: 6, column: 0, file: !1, scope: !14) 158!20 = !MDBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed) 159!21 = !{i32 2, !"Dwarf Version", i32 4} 160!22 = !{i32 2, !"Debug Info Version", i32 3} 161!23 = !{!"clang version 3.5.0 "} 162!24 = !{i1 false} 163!25 = !MDLocalVariable(tag: DW_TAG_arg_variable, name: "b", line: 5, arg: 1, scope: !14, file: !5, type: !11) 164!26 = !MDLocation(line: 14, scope: !4) 165!27 = !MDLocation(line: 5, scope: !14, inlinedAt: !26) 166!28 = !MDLocation(line: 10, scope: !14, inlinedAt: !26) 167!29 = !MDLocation(line: 15, scope: !4) 168!30 = !MDLocation(line: 17, scope: !8) 169!31 = !MDLocalVariable(tag: DW_TAG_arg_variable, name: "b", line: 5, arg: 1, scope: !14, file: !5, type: !11) 170!32 = !MDLocation(line: 18, scope: !8) 171!33 = !MDLocation(line: 5, scope: !14, inlinedAt: !32) 172!34 = !MDLocation(line: 6, scope: !19, inlinedAt: !32) 173!35 = !MDLocation(line: 7, scope: !18, inlinedAt: !32) 174!36 = !{!37, !37, i64 0} 175!37 = !{!"int", !38, i64 0} 176!38 = !{!"omnipotent char", !39, i64 0} 177!39 = !{!"Simple C/C++ TBAA"} 178!40 = !MDLocalVariable(tag: DW_TAG_auto_variable, name: "s", line: 7, scope: !18, file: !5, type: !20) 179!41 = !MDLocation(line: 8, scope: !18, inlinedAt: !32) 180!42 = !MDLocation(line: 9, scope: !18, inlinedAt: !32) 181!43 = !MDLocation(line: 10, scope: !14, inlinedAt: !32) 182!44 = !MDLocation(line: 19, scope: !8) 183