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
22%struct.foo = type { %struct.base }
23%struct.base = type { i32 (...)** }
24
25$_ZN3fooC2Ev = comdat any
26
27$_ZN3fooD2Ev = comdat any
28
29$_ZN4baseC2Ev = comdat any
30
31@f = global %struct.foo zeroinitializer, align 8
32@__dso_handle = external global i8
33@_ZTV4base = external unnamed_addr constant [4 x i8*]
34@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 }]
35
36define internal void @__cxx_global_var_init() section ".text.startup" {
37entry:
38  call void @_ZN3fooC2Ev(%struct.foo* @f) #2, !dbg !33
39  %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 !33
40  ret void, !dbg !33
41}
42
43; Function Attrs: inlinehint nounwind uwtable
44define linkonce_odr void @_ZN3fooC2Ev(%struct.foo* %this) unnamed_addr #0 comdat align 2 {
45entry:
46  %this.addr = alloca %struct.foo*, align 8
47  store %struct.foo* %this, %struct.foo** %this.addr, align 8
48  call void @llvm.dbg.declare(metadata %struct.foo** %this.addr, metadata !34, metadata !36), !dbg !37
49  %this1 = load %struct.foo*, %struct.foo** %this.addr
50  %b = getelementptr inbounds %struct.foo, %struct.foo* %this1, i32 0, i32 0, !dbg !38
51  call void @_ZN4baseC2Ev(%struct.base* %b) #2, !dbg !38
52  ret void, !dbg !38
53}
54
55; Function Attrs: inlinehint uwtable
56define linkonce_odr void @_ZN3fooD2Ev(%struct.foo* %this) unnamed_addr #1 comdat align 2 {
57entry:
58  %this.addr = alloca %struct.foo*, align 8
59  store %struct.foo* %this, %struct.foo** %this.addr, align 8
60  call void @llvm.dbg.declare(metadata %struct.foo** %this.addr, metadata !39, metadata !36), !dbg !40
61  %this1 = load %struct.foo*, %struct.foo** %this.addr
62  %b = getelementptr inbounds %struct.foo, %struct.foo* %this1, i32 0, i32 0, !dbg !41
63  call void @_ZN4baseD1Ev(%struct.base* %b), !dbg !41
64  ret void, !dbg !43
65}
66
67; Function Attrs: nounwind
68declare i32 @__cxa_atexit(void (i8*)*, i8*, i8*) #2
69
70; Function Attrs: nounwind readnone
71declare void @llvm.dbg.declare(metadata, metadata, metadata) #3
72
73; Function Attrs: inlinehint nounwind uwtable
74define linkonce_odr void @_ZN4baseC2Ev(%struct.base* %this) unnamed_addr #0 comdat align 2 {
75entry:
76  %this.addr = alloca %struct.base*, align 8
77  store %struct.base* %this, %struct.base** %this.addr, align 8
78  call void @llvm.dbg.declare(metadata %struct.base** %this.addr, metadata !44, metadata !36), !dbg !46
79  %this1 = load %struct.base*, %struct.base** %this.addr
80  %0 = bitcast %struct.base* %this1 to i32 (...)***, !dbg !47
81  store i32 (...)** bitcast (i8** getelementptr inbounds ([4 x i8*], [4 x i8*]* @_ZTV4base, i64 0, i64 2) to i32 (...)**), i32 (...)*** %0, !dbg !47
82  ret void, !dbg !47
83}
84
85declare void @_ZN4baseD1Ev(%struct.base*) #4
86
87define internal void @_GLOBAL__sub_I_decl_derived_member.cpp() section ".text.startup" {
88entry:
89  call void @__cxx_global_var_init(), !dbg !48
90  ret void
91}
92
93attributes #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" }
94attributes #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" }
95attributes #2 = { nounwind }
96attributes #3 = { nounwind readnone }
97attributes #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" }
98
99!llvm.dbg.cu = !{!0}
100!llvm.module.flags = !{!30, !31}
101!llvm.ident = !{!32}
102
103!0 = !MDCompileUnit(language: DW_LANG_C_plus_plus, producer: "clang version 3.7.0 (trunk 227104) (llvm/trunk 227103)", isOptimized: false, emissionKind: 1, file: !1, enums: !2, retainedTypes: !3, subprograms: !9, globals: !28, imports: !2)
104!1 = !MDFile(filename: "decl-derived-member.cpp", directory: "/tmp/dbginfo")
105!2 = !{}
106!3 = !{!4, !8}
107!4 = !MDCompositeType(tag: DW_TAG_structure_type, name: "foo", line: 5, size: 64, align: 64, file: !1, elements: !5, identifier: "_ZTS3foo")
108!5 = !{!6}
109!6 = !MDDerivedType(tag: DW_TAG_member, name: "b", line: 6, size: 64, align: 64, file: !1, scope: !"_ZTS3foo", baseType: !7)
110!7 = !MDDerivedType(tag: DW_TAG_typedef, name: "base_type", line: 4, file: !1, baseType: !"_ZTS4base")
111!8 = !MDCompositeType(tag: DW_TAG_structure_type, name: "base", line: 1, flags: DIFlagFwdDecl, file: !1, identifier: "_ZTS4base")
112!9 = !{!10, !14, !19, !24, !26}
113!10 = !MDSubprogram(name: "__cxx_global_var_init", line: 8, isLocal: true, isDefinition: true, flags: DIFlagPrototyped, isOptimized: false, scopeLine: 8, file: !1, scope: !11, type: !12, function: void ()* @__cxx_global_var_init, variables: !2)
114!11 = !MDFile(filename: "decl-derived-member.cpp", directory: "/tmp/dbginfo")
115!12 = !MDSubroutineType(types: !13)
116!13 = !{null}
117!14 = !MDSubprogram(name: "foo", linkageName: "_ZN3fooC2Ev", line: 5, isLocal: false, isDefinition: true, flags: DIFlagArtificial | DIFlagPrototyped, isOptimized: false, scopeLine: 5, file: !1, scope: !"_ZTS3foo", type: !15, function: void (%struct.foo*)* @_ZN3fooC2Ev, declaration: !18, variables: !2)
118!15 = !MDSubroutineType(types: !16)
119!16 = !{null, !17}
120!17 = !MDDerivedType(tag: DW_TAG_pointer_type, size: 64, align: 64, flags: DIFlagArtificial | DIFlagObjectPointer, baseType: !"_ZTS3foo")
121!18 = !MDSubprogram(name: "foo", isLocal: false, isDefinition: false, flags: DIFlagArtificial | DIFlagPrototyped, isOptimized: false, scope: !"_ZTS3foo", type: !15)
122!19 = !MDSubprogram(name: "base", linkageName: "_ZN4baseC2Ev", line: 1, isLocal: false, isDefinition: true, flags: DIFlagArtificial | DIFlagPrototyped, isOptimized: false, scopeLine: 1, file: !1, scope: !"_ZTS4base", type: !20, function: void (%struct.base*)* @_ZN4baseC2Ev, declaration: !23, variables: !2)
123!20 = !MDSubroutineType(types: !21)
124!21 = !{null, !22}
125!22 = !MDDerivedType(tag: DW_TAG_pointer_type, size: 64, align: 64, flags: DIFlagArtificial | DIFlagObjectPointer, baseType: !"_ZTS4base")
126!23 = !MDSubprogram(name: "base", isLocal: false, isDefinition: false, flags: DIFlagArtificial | DIFlagPrototyped, isOptimized: false, scope: !"_ZTS4base", type: !20)
127!24 = !MDSubprogram(name: "~foo", linkageName: "_ZN3fooD2Ev", line: 5, isLocal: false, isDefinition: true, flags: DIFlagArtificial | DIFlagPrototyped, isOptimized: false, scopeLine: 5, file: !1, scope: !"_ZTS3foo", type: !15, function: void (%struct.foo*)* @_ZN3fooD2Ev, declaration: !25, variables: !2)
128!25 = !MDSubprogram(name: "~foo", isLocal: false, isDefinition: false, flags: DIFlagArtificial | DIFlagPrototyped, isOptimized: false, scope: !"_ZTS3foo", type: !15)
129!26 = !MDSubprogram(name: "", linkageName: "_GLOBAL__sub_I_decl_derived_member.cpp", isLocal: true, isDefinition: true, flags: DIFlagArtificial, isOptimized: false, file: !1, scope: !11, type: !27, function: void ()* @_GLOBAL__sub_I_decl_derived_member.cpp, variables: !2)
130!27 = !MDSubroutineType(types: !2)
131!28 = !{!29}
132!29 = !MDGlobalVariable(name: "f", line: 8, isLocal: false, isDefinition: true, scope: null, file: !11, type: !"_ZTS3foo", variable: %struct.foo* @f)
133!30 = !{i32 2, !"Dwarf Version", i32 4}
134!31 = !{i32 2, !"Debug Info Version", i32 3}
135!32 = !{!"clang version 3.7.0 (trunk 227104) (llvm/trunk 227103)"}
136!33 = !MDLocation(line: 8, column: 5, scope: !10)
137!34 = !MDLocalVariable(tag: DW_TAG_arg_variable, name: "this", arg: 1, flags: DIFlagArtificial | DIFlagObjectPointer, scope: !14, type: !35)
138!35 = !MDDerivedType(tag: DW_TAG_pointer_type, size: 64, align: 64, baseType: !"_ZTS3foo")
139!36 = !MDExpression()
140!37 = !MDLocation(line: 0, scope: !14)
141!38 = !MDLocation(line: 5, column: 8, scope: !14)
142!39 = !MDLocalVariable(tag: DW_TAG_arg_variable, name: "this", arg: 1, flags: DIFlagArtificial | DIFlagObjectPointer, scope: !24, type: !35)
143!40 = !MDLocation(line: 0, scope: !24)
144!41 = !MDLocation(line: 5, column: 8, scope: !42)
145!42 = distinct !MDLexicalBlock(line: 5, column: 8, file: !1, scope: !24)
146!43 = !MDLocation(line: 5, column: 8, scope: !24)
147!44 = !MDLocalVariable(tag: DW_TAG_arg_variable, name: "this", arg: 1, flags: DIFlagArtificial | DIFlagObjectPointer, scope: !19, type: !45)
148!45 = !MDDerivedType(tag: DW_TAG_pointer_type, size: 64, align: 64, baseType: !"_ZTS4base")
149!46 = !MDLocation(line: 0, scope: !19)
150!47 = !MDLocation(line: 1, column: 8, scope: !19)
151!48 = !MDLocation(line: 0, scope: !26)
152