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1; REQUIRES: object-emission
2
3; RUN: llc -mtriple x86_64-pc-linux -O0 -filetype=obj %s -o %t
4; RUN: llvm-dwarfdump %t | FileCheck %s
5
6; Testcase from:
7; struct base {
8;  virtual ~base();
9; };
10; typedef base base_type;
11; struct foo {
12;  base_type b;
13; };
14; foo f;
15
16; Where member b should be seen as a field at an offset and not a bitfield.
17
18; CHECK: DW_TAG_member
19; CHECK: DW_AT_name{{.*}}"b"
20; CHECK-NOT: DW_AT_bit_offset
21
22source_filename = "test/DebugInfo/X86/decl-derived-member.ll"
23
24%struct.foo = type { %struct.base }
25%struct.base = type { i32 (...)** }
26
27$_ZN3fooC2Ev = comdat any
28
29$_ZN3fooD2Ev = comdat any
30
31$_ZN4baseC2Ev = comdat any
32
33@f = global %struct.foo zeroinitializer, align 8, !dbg !0
34@__dso_handle = external global i8
35@_ZTV4base = external unnamed_addr constant [4 x i8*]
36@llvm.global_ctors = appending global [1 x { i32, void ()*, i8* }] [{ i32, void ()*, i8* } { i32 65535, void ()* @_GLOBAL__sub_I_decl_derived_member.cpp, i8* null }]
37
38define internal void @__cxx_global_var_init() section ".text.startup" !dbg !15 {
39entry:
40  call void @_ZN3fooC2Ev(%struct.foo* @f) #2, !dbg !18
41  %0 = call i32 @__cxa_atexit(void (i8*)* bitcast (void (%struct.foo*)* @_ZN3fooD2Ev to void (i8*)*), i8* bitcast (%struct.foo* @f to i8*), i8* @__dso_handle) #2, !dbg !18
42  ret void, !dbg !18
43}
44
45; Function Attrs: inlinehint nounwind uwtable
46define linkonce_odr void @_ZN3fooC2Ev(%struct.foo* %this) unnamed_addr #0 comdat align 2 !dbg !19 {
47entry:
48  %this.addr = alloca %struct.foo*, align 8
49  store %struct.foo* %this, %struct.foo** %this.addr, align 8
50  call void @llvm.dbg.declare(metadata %struct.foo** %this.addr, metadata !24, metadata !26), !dbg !27
51  %this1 = load %struct.foo*, %struct.foo** %this.addr
52  %b = getelementptr inbounds %struct.foo, %struct.foo* %this1, i32 0, i32 0, !dbg !28
53  call void @_ZN4baseC2Ev(%struct.base* %b) #2, !dbg !28
54  ret void, !dbg !28
55}
56
57; Function Attrs: inlinehint uwtable
58define linkonce_odr void @_ZN3fooD2Ev(%struct.foo* %this) unnamed_addr #1 comdat align 2 !dbg !29 {
59entry:
60  %this.addr = alloca %struct.foo*, align 8
61  store %struct.foo* %this, %struct.foo** %this.addr, align 8
62  call void @llvm.dbg.declare(metadata %struct.foo** %this.addr, metadata !31, metadata !26), !dbg !32
63  %this1 = load %struct.foo*, %struct.foo** %this.addr
64  %b = getelementptr inbounds %struct.foo, %struct.foo* %this1, i32 0, i32 0, !dbg !33
65  call void @_ZN4baseD1Ev(%struct.base* %b), !dbg !33
66  ret void, !dbg !35
67}
68
69; Function Attrs: nounwind
70declare i32 @__cxa_atexit(void (i8*)*, i8*, i8*) #2
71
72; Function Attrs: nounwind readnone
73declare void @llvm.dbg.declare(metadata, metadata, metadata) #3
74
75; Function Attrs: inlinehint nounwind uwtable
76define linkonce_odr void @_ZN4baseC2Ev(%struct.base* %this) unnamed_addr #0 comdat align 2 !dbg !36 {
77entry:
78  %this.addr = alloca %struct.base*, align 8
79  store %struct.base* %this, %struct.base** %this.addr, align 8
80  call void @llvm.dbg.declare(metadata %struct.base** %this.addr, metadata !41, metadata !26), !dbg !43
81  %this1 = load %struct.base*, %struct.base** %this.addr
82  %0 = bitcast %struct.base* %this1 to i32 (...)***, !dbg !44
83  store i32 (...)** bitcast (i8** getelementptr inbounds ([4 x i8*], [4 x i8*]* @_ZTV4base, i64 0, i64 2) to i32 (...)**), i32 (...)*** %0, !dbg !44
84  ret void, !dbg !44
85}
86
87declare void @_ZN4baseD1Ev(%struct.base*) #4
88
89define internal void @_GLOBAL__sub_I_decl_derived_member.cpp() section ".text.startup" {
90entry:
91  call void @__cxx_global_var_init(), !dbg !45
92  ret void
93}
94
95attributes #0 = { inlinehint 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" }
96attributes #1 = { inlinehint 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" }
97attributes #2 = { nounwind }
98attributes #3 = { nounwind readnone }
99attributes #4 = { "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" }
100
101!llvm.dbg.cu = !{!8}
102!llvm.module.flags = !{!12, !13}
103!llvm.ident = !{!14}
104
105!0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression())
106!1 = !DIGlobalVariable(name: "f", scope: null, file: !2, line: 8, type: !3, isLocal: false, isDefinition: true)
107!2 = !DIFile(filename: "decl-derived-member.cpp", directory: "/tmp/dbginfo")
108!3 = !DICompositeType(tag: DW_TAG_structure_type, name: "foo", file: !2, line: 5, size: 64, align: 64, elements: !4, identifier: "_ZTS3foo")
109!4 = !{!5}
110!5 = !DIDerivedType(tag: DW_TAG_member, name: "b", scope: !3, file: !2, line: 6, baseType: !6, size: 64, align: 64)
111!6 = !DIDerivedType(tag: DW_TAG_typedef, name: "base_type", file: !2, line: 4, baseType: !7)
112!7 = !DICompositeType(tag: DW_TAG_structure_type, name: "base", file: !2, line: 1, flags: DIFlagFwdDecl, identifier: "_ZTS4base")
113!8 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !2, producer: "clang version 3.7.0 (trunk 227104) (llvm/trunk 227103)", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !9, retainedTypes: !10, globals: !11, imports: !9)
114!9 = !{}
115!10 = !{!3, !7}
116!11 = !{!0}
117!12 = !{i32 2, !"Dwarf Version", i32 4}
118!13 = !{i32 2, !"Debug Info Version", i32 3}
119!14 = !{!"clang version 3.7.0 (trunk 227104) (llvm/trunk 227103)"}
120!15 = distinct !DISubprogram(name: "__cxx_global_var_init", scope: !2, file: !2, line: 8, type: !16, isLocal: true, isDefinition: true, scopeLine: 8, flags: DIFlagPrototyped, isOptimized: false, unit: !8, retainedNodes: !9)
121!16 = !DISubroutineType(types: !17)
122!17 = !{null}
123!18 = !DILocation(line: 8, column: 5, scope: !15)
124!19 = distinct !DISubprogram(name: "foo", linkageName: "_ZN3fooC2Ev", scope: !3, file: !2, line: 5, type: !20, isLocal: false, isDefinition: true, scopeLine: 5, flags: DIFlagArtificial | DIFlagPrototyped, isOptimized: false, unit: !8, declaration: !23, retainedNodes: !9)
125!20 = !DISubroutineType(types: !21)
126!21 = !{null, !22}
127!22 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !3, size: 64, align: 64, flags: DIFlagArtificial | DIFlagObjectPointer)
128!23 = !DISubprogram(name: "foo", scope: !3, type: !20, isLocal: false, isDefinition: false, flags: DIFlagArtificial | DIFlagPrototyped, isOptimized: false)
129!24 = !DILocalVariable(name: "this", arg: 1, scope: !19, type: !25, flags: DIFlagArtificial | DIFlagObjectPointer)
130!25 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !3, size: 64, align: 64)
131!26 = !DIExpression()
132!27 = !DILocation(line: 0, scope: !19)
133!28 = !DILocation(line: 5, column: 8, scope: !19)
134!29 = distinct !DISubprogram(name: "~foo", linkageName: "_ZN3fooD2Ev", scope: !3, file: !2, line: 5, type: !20, isLocal: false, isDefinition: true, scopeLine: 5, flags: DIFlagArtificial | DIFlagPrototyped, isOptimized: false, unit: !8, declaration: !30, retainedNodes: !9)
135!30 = !DISubprogram(name: "~foo", scope: !3, type: !20, isLocal: false, isDefinition: false, flags: DIFlagArtificial | DIFlagPrototyped, isOptimized: false)
136!31 = !DILocalVariable(name: "this", arg: 1, scope: !29, type: !25, flags: DIFlagArtificial | DIFlagObjectPointer)
137!32 = !DILocation(line: 0, scope: !29)
138!33 = !DILocation(line: 5, column: 8, scope: !34)
139!34 = distinct !DILexicalBlock(scope: !29, file: !2, line: 5, column: 8)
140!35 = !DILocation(line: 5, column: 8, scope: !29)
141!36 = distinct !DISubprogram(name: "base", linkageName: "_ZN4baseC2Ev", scope: !7, file: !2, line: 1, type: !37, isLocal: false, isDefinition: true, scopeLine: 1, flags: DIFlagArtificial | DIFlagPrototyped, isOptimized: false, unit: !8, declaration: !40, retainedNodes: !9)
142!37 = !DISubroutineType(types: !38)
143!38 = !{null, !39}
144!39 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !7, size: 64, align: 64, flags: DIFlagArtificial | DIFlagObjectPointer)
145!40 = !DISubprogram(name: "base", scope: !7, type: !37, isLocal: false, isDefinition: false, flags: DIFlagArtificial | DIFlagPrototyped, isOptimized: false)
146!41 = !DILocalVariable(name: "this", arg: 1, scope: !36, type: !42, flags: DIFlagArtificial | DIFlagObjectPointer)
147!42 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !7, size: 64, align: 64)
148!43 = !DILocation(line: 0, scope: !36)
149!44 = !DILocation(line: 1, column: 8, scope: !36)
150!45 = !DILocation(line: 0, scope: !46)
151!46 = distinct !DISubprogram(linkageName: "_GLOBAL__sub_I_decl_derived_member.cpp", scope: !2, file: !2, type: !47, isLocal: true, isDefinition: true, flags: DIFlagArtificial, isOptimized: false, unit: !8, retainedNodes: !9)
152!47 = !DISubroutineType(types: !9)
153
154