| blob | 5c21d052ffe6afdd29929cb1ca7ec816c679b928 |
1 ; RUN: llc < %s -filetype=obj | llvm-readobj - --codeview | FileCheck %s
2 ; RUN: llc < %s | llvm-mc -filetype=obj --triple=x86_64-windows | llvm-readobj - --codeview | FileCheck %s
3 ;
4 ; Verify CodeView emission does not emit forward references for unnamed
5 ; structs/unions. If a forward reference is emitted for an unnamed composite
6 ; type then Visual Studio will not be able to display the value.
7 ;
8 ; Previous values displayed by Visual Studio:
9 ; local.unnamed_struct {...}
10 ; local.unnamed_union {...}
11 ;
12 ; New values displayed by Visual Studio:
13 ; local.unnamed_struct {m3=66 'B' }
14 ; local.unnamed_union {m1=65 m2=65 'A' }
15 ;
16 ; The reproducer:
17 ; $ cat unnamed.c
18 ; struct named_struct {
19 ; int id;
20 ; union {
21 ; int m1;
22 ; char m2;
23 ; } unnamed_union;
24 ; struct {
25 ; char m3;
26 ; } unnamed_struct;
27 ; };
28 ;
29 ; int main()
30 ; {
31 ; struct named_struct local;
32 ;
33 ; local.id = 1;
34 ; local.unnamed_union.m1 = 65;
35 ; local.unnamed_struct.m3 = 'B';
36 ;
37 ; return 0;
38 ; }
39 ;
40 ; To regenerate the IR below:
41 ; $ clang unnamed.c -S -emit-llvm -g -gcodeview
42 ;
43 ; CHECK: FieldList ([[UnnamedUnionFieldList:.*]]) {
44 ; CHECK-NEXT: TypeLeafKind: LF_FIELDLIST (0x1203)
45 ; CHECK-NEXT: DataMember {
46 ; CHECK-NEXT: TypeLeafKind: LF_MEMBER (0x150D)
47 ; CHECK-NEXT: AccessSpecifier: Public (0x3)
48 ; CHECK-NEXT: Type: int (0x74)
49 ; CHECK-NEXT: FieldOffset: 0x0
50 ; CHECK-NEXT: Name: m1
51 ; CHECK-NEXT: }
52 ; CHECK-NEXT: DataMember {
53 ; CHECK-NEXT: TypeLeafKind: LF_MEMBER (0x150D)
54 ; CHECK-NEXT: AccessSpecifier: Public (0x3)
55 ; CHECK-NEXT: Type: char (0x70)
56 ; CHECK-NEXT: FieldOffset: 0x0
57 ; CHECK-NEXT: Name: m2
58 ; CHECK-NEXT: }
59 ; CHECK-NEXT: }
60 ; CHECK: Union ([[UnnamedUnion:.*]]) {
61 ; CHECK-NEXT: TypeLeafKind: LF_UNION (0x1506)
62 ; CHECK-NEXT: MemberCount: 2
63 ; CHECK-NEXT: Properties [ (0x408)
64 ; CHECK-NEXT: Nested (0x8)
65 ; CHECK-NEXT: Sealed (0x400)
66 ; CHECK-NEXT: ]
67 ; CHECK-NEXT: FieldList: <field list> ([[UnnamedUnionFieldList]])
68 ; CHECK-NEXT: SizeOf: 4
69 ; CHECK-NEXT: Name: named_struct::<unnamed-tag>
70 ; CHECK-NEXT: }
71 ; CHECK: FieldList ([[UnnamedStructFieldList:.*]]) {
72 ; CHECK-NEXT: TypeLeafKind: LF_FIELDLIST (0x1203)
73 ; CHECK-NEXT: DataMember {
74 ; CHECK-NEXT: TypeLeafKind: LF_MEMBER (0x150D)
75 ; CHECK-NEXT: AccessSpecifier: Public (0x3)
76 ; CHECK-NEXT: Type: char (0x70)
77 ; CHECK-NEXT: FieldOffset: 0x0
78 ; CHECK-NEXT: Name: m3
79 ; CHECK-NEXT: }
80 ; CHECK-NEXT: }
81 ; CHECK: Struct ([[UnnamedStruct:.*]]) {
82 ; CHECK-NEXT: TypeLeafKind: LF_STRUCTURE (0x1505)
83 ; CHECK-NEXT: MemberCount: 1
84 ; CHECK-NEXT: Properties [ (0x8)
85 ; CHECK-NEXT: Nested (0x8)
86 ; CHECK-NEXT: ]
87 ; CHECK-NEXT: FieldList: <field list> ([[UnnamedStructFieldList]])
88 ; CHECK-NEXT: DerivedFrom: 0x0
89 ; CHECK-NEXT: VShape: 0x0
90 ; CHECK-NEXT: SizeOf: 1
91 ; CHECK-NEXT: Name: named_struct::<unnamed-tag>
92 ; CHECK-NEXT: }
93 ; CHECK: FieldList ([[NamedStructFieldList:.*]]) {
94 ; CHECK-NEXT: TypeLeafKind: LF_FIELDLIST (0x1203)
95 ; CHECK-NEXT: DataMember {
96 ; CHECK-NEXT: TypeLeafKind: LF_MEMBER (0x150D)
97 ; CHECK-NEXT: AccessSpecifier: Public (0x3)
98 ; CHECK-NEXT: Type: int (0x74)
99 ; CHECK-NEXT: FieldOffset: 0x0
100 ; CHECK-NEXT: Name: id
101 ; CHECK-NEXT: }
102 ; CHECK-NEXT: DataMember {
103 ; CHECK-NEXT: TypeLeafKind: LF_MEMBER (0x150D)
104 ; CHECK-NEXT: AccessSpecifier: Public (0x3)
105 ; CHECK-NEXT: Type: named_struct::<unnamed-tag> ([[UnnamedUnion]])
106 ; CHECK-NEXT: FieldOffset: 0x4
107 ; CHECK-NEXT: Name: unnamed_union
108 ; CHECK-NEXT: }
109 ; CHECK-NEXT: DataMember {
110 ; CHECK-NEXT: TypeLeafKind: LF_MEMBER (0x150D)
111 ; CHECK-NEXT: AccessSpecifier: Public (0x3)
112 ; CHECK-NEXT: Type: named_struct::<unnamed-tag> ([[UnnamedStruct]])
113 ; CHECK-NEXT: FieldOffset: 0x8
114 ; CHECK-NEXT: Name: unnamed_struct
115 ; CHECK-NEXT: }
116 ; CHECK-NEXT: }
117 ; CHECK: Struct ({{.*}}) {
118 ; CHECK-NEXT: TypeLeafKind: LF_STRUCTURE (0x1505)
119 ; CHECK-NEXT: MemberCount: 3
120 ; CHECK-NEXT: Properties [ (0x0)
121 ; CHECK-NEXT: ]
122 ; CHECK-NEXT: FieldList: <field list> ([[NamedStructFieldList]])
123 ; CHECK-NEXT: DerivedFrom: 0x0
124 ; CHECK-NEXT: VShape: 0x0
125 ; CHECK-NEXT: SizeOf: 12
126 ; CHECK-NEXT: Name: named_struct
127 ; CHECK-NEXT: }
129 ; ModuleID = 'unnamed.c'
130 source_filename = "unnamed.c"
131 target datalayout = "e-m:w-i64:64-f80:128-n8:16:32:64-S128"
132 target triple = "x86_64-pc-windows-msvc19.0.24210"
134 %struct.named_struct = type { i32, %union.anon, %struct.anon }
135 %union.anon = type { i32 }
136 %struct.anon = type { i8 }
138 ; Function Attrs: noinline nounwind uwtable
139 define i32 @main() #0 !dbg !7 {
140 entry:
141 %retval = alloca i32, align 4
142 %local = alloca %struct.named_struct, align 4
143 store i32 0, i32* %retval, align 4
144 call void @llvm.dbg.declare(metadata %struct.named_struct* %local, metadata !11, metadata !25), !dbg !26
145 %id = getelementptr inbounds %struct.named_struct, %struct.named_struct* %local, i32 0, i32 0, !dbg !27
146 store i32 1, i32* %id, align 4, !dbg !28
147 %unnamed_union = getelementptr inbounds %struct.named_struct, %struct.named_struct* %local, i32 0, i32 1, !dbg !29
148 %m1 = bitcast %union.anon* %unnamed_union to i32*, !dbg !30
149 store i32 65, i32* %m1, align 4, !dbg !31
150 %unnamed_struct = getelementptr inbounds %struct.named_struct, %struct.named_struct* %local, i32 0, i32 2, !dbg !32
151 %m3 = getelementptr inbounds %struct.anon, %struct.anon* %unnamed_struct, i32 0, i32 0, !dbg !33
152 store i8 66, i8* %m3, align 4, !dbg !34
153 ret i32 0, !dbg !35
154 }
156 ; Function Attrs: nounwind readnone
157 declare void @llvm.dbg.declare(metadata, metadata, metadata) #1
159 attributes #0 = { noinline nounwind uwtable "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-jump-tables"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+fxsr,+mmx,+sse,+sse2,+x87" "unsafe-fp-math"="false" "use-soft-float"="false" }
160 attributes #1 = { nounwind readnone }
162 !llvm.dbg.cu = !{!0}
163 !llvm.module.flags = !{!3, !4, !5}
164 !llvm.ident = !{!6}
166 !0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 5.0.0 (trunk)", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2)
167 !1 = !DIFile(filename: "unnamed.c", directory: "C:\5Cpath\5Cto\5Cdirectory", checksumkind: CSK_MD5, checksum: "a1874da39665a126d6949d929fbd4818")
168 !2 = !{}
169 !3 = !{i32 2, !"CodeView", i32 1}
170 !4 = !{i32 2, !"Debug Info Version", i32 3}
171 !5 = !{i32 1, !"PIC Level", i32 2}
172 !6 = !{!"clang version 5.0.0 (trunk)"}
173 !7 = distinct !DISubprogram(name: "main", scope: !1, file: !1, line: 12, type: !8, isLocal: false, isDefinition: true, scopeLine: 13, isOptimized: false, unit: !0, retainedNodes: !2)
174 !8 = !DISubroutineType(types: !9)
175 !9 = !{!10}
176 !10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
177 !11 = !DILocalVariable(name: "local", scope: !7, file: !1, line: 14, type: !12)
178 !12 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "named_struct", file: !1, line: 1, size: 96, elements: !13)
179 !13 = !{!14, !15, !21}
180 !14 = !DIDerivedType(tag: DW_TAG_member, name: "id", scope: !12, file: !1, line: 2, baseType: !10, size: 32)
181 !15 = !DIDerivedType(tag: DW_TAG_member, name: "unnamed_union", scope: !12, file: !1, line: 6, baseType: !16, size: 32, offset: 32)
182 !16 = distinct !DICompositeType(tag: DW_TAG_union_type, scope: !12, file: !1, line: 3, size: 32, elements: !17)
183 !17 = !{!18, !19}
184 !18 = !DIDerivedType(tag: DW_TAG_member, name: "m1", scope: !16, file: !1, line: 4, baseType: !10, size: 32)
185 !19 = !DIDerivedType(tag: DW_TAG_member, name: "m2", scope: !16, file: !1, line: 5, baseType: !20, size: 8)
186 !20 = !DIBasicType(name: "char", size: 8, encoding: DW_ATE_signed_char)
187 !21 = !DIDerivedType(tag: DW_TAG_member, name: "unnamed_struct", scope: !12, file: !1, line: 9, baseType: !22, size: 8, offset: 64)
188 !22 = distinct !DICompositeType(tag: DW_TAG_structure_type, scope: !12, file: !1, line: 7, size: 8, elements: !23)
189 !23 = !{!24}
190 !24 = !DIDerivedType(tag: DW_TAG_member, name: "m3", scope: !22, file: !1, line: 8, baseType: !20, size: 8)
191 !25 = !DIExpression()
192 !26 = !DILocation(line: 14, column: 23, scope: !7)
193 !27 = !DILocation(line: 16, column: 9, scope: !7)
194 !28 = !DILocation(line: 16, column: 12, scope: !7)
195 !29 = !DILocation(line: 17, column: 9, scope: !7)
196 !30 = !DILocation(line: 17, column: 23, scope: !7)
197 !31 = !DILocation(line: 17, column: 26, scope: !7)
198 !32 = !DILocation(line: 18, column: 9, scope: !7)
199 !33 = !DILocation(line: 18, column: 24, scope: !7)
200 !34 = !DILocation(line: 18, column: 27, scope: !7)
201 !35 = !DILocation(line: 20, column: 3, scope: !7)