1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
|
; REQUIRES: x86-registered-target
; RUN: llc -filetype=obj -mtriple=x86_64-unknown-linux-gnu -o %t %s
; RUN: llvm-dwarfdump -debug-info %t | FileCheck %s
; Source:
; #define __tag1 __attribute__((btf_decl_tag("tag1")))
; #define __tag2 __attribute__((btf_decl_tag("tag2")))
;
; struct t1 {
; int a __tag1 __tag2;
; } __tag1 __tag2;
;
; int g1 __tag1 __tag2;
;
; int __tag1 __tag2 foo(struct t1 *arg __tag1 __tag2) {
; return arg->a;
; }
; Compilation flag:
; clang -target x86_64 -g -S -emit-llvm t.c
%struct.t1 = type { i32 }
@g1 = dso_local global i32 0, align 4, !dbg !0
; Function Attrs: noinline nounwind optnone uwtable
define dso_local i32 @foo(%struct.t1* %arg) #0 !dbg !16 {
entry:
%arg.addr = alloca %struct.t1*, align 8
store %struct.t1* %arg, %struct.t1** %arg.addr, align 8
call void @llvm.dbg.declare(metadata %struct.t1** %arg.addr, metadata !23, metadata !DIExpression()), !dbg !24
%0 = load %struct.t1*, %struct.t1** %arg.addr, align 8, !dbg !25
%a = getelementptr inbounds %struct.t1, %struct.t1* %0, i32 0, i32 0, !dbg !26
%1 = load i32, i32* %a, align 4, !dbg !26
ret i32 %1, !dbg !27
}
; Function Attrs: nofree nosync nounwind readnone speculatable willreturn
declare void @llvm.dbg.declare(metadata, metadata, metadata) #1
attributes #0 = { noinline nounwind optnone uwtable "frame-pointer"="all" "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
attributes #1 = { nofree nosync nounwind readnone speculatable willreturn }
!llvm.dbg.cu = !{!2}
!llvm.module.flags = !{!10, !11, !12, !13, !14}
!llvm.ident = !{!15}
!0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression())
!1 = distinct !DIGlobalVariable(name: "g1", scope: !2, file: !3, line: 8, type: !6, isLocal: false, isDefinition: true, annotations: !7)
; CHECK: DW_TAG_variable
; CHECK-NEXT: DW_AT_name ("g1")
; CHECK: DW_TAG_LLVM_annotation
; CHECK-NEXT: DW_AT_name ("btf_decl_tag")
; CHECK-NEXT: DW_AT_const_value ("tag1")
; CHECK-EMPTY:
; CHECK-NEXT: DW_TAG_LLVM_annotation
; CHECK-NEXT: DW_AT_name ("btf_decl_tag")
; CHECK-NEXT: DW_AT_const_value ("tag2")
; CHECK-EMPTY:
; CHECK-NEXT: NULL
!2 = distinct !DICompileUnit(language: DW_LANG_C99, file: !3, producer: "clang version 13.0.0 (https://github.com/llvm/llvm-project.git 305231a4f71b68945b4dd92925c76ff49e377c86)", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !4, globals: !5, splitDebugInlining: false, nameTableKind: None)
!3 = !DIFile(filename: "t.c", directory: "/tmp/home/yhs/work/tests/llvm/btf_tag")
!4 = !{}
!5 = !{!0}
!6 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
!7 = !{!8, !9}
!8 = !{!"btf_decl_tag", !"tag1"}
!9 = !{!"btf_decl_tag", !"tag2"}
!10 = !{i32 7, !"Dwarf Version", i32 4}
!11 = !{i32 2, !"Debug Info Version", i32 3}
!12 = !{i32 1, !"wchar_size", i32 4}
!13 = !{i32 7, !"uwtable", i32 1}
!14 = !{i32 7, !"frame-pointer", i32 2}
!15 = !{!"clang version 13.0.0 (https://github.com/llvm/llvm-project.git 305231a4f71b68945b4dd92925c76ff49e377c86)"}
!16 = distinct !DISubprogram(name: "foo", scope: !3, file: !3, line: 10, type: !17, scopeLine: 10, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition, unit: !2, retainedNodes: !4, annotations: !7)
; CHECK: DW_TAG_subprogram
; CHECK: DW_AT_name ("foo")
; CHECK: DW_TAG_formal_parameter
; CHECK: DW_TAG_LLVM_annotation
; CHECK-NEXT: DW_AT_name ("btf_decl_tag")
; CHECK-NEXT: DW_AT_const_value ("tag1")
; CHECK-EMPTY:
; CHECK-NEXT: DW_TAG_LLVM_annotation
; CHECK-NEXT: DW_AT_name ("btf_decl_tag")
; CHECK-NEXT: DW_AT_const_value ("tag2")
; CHECK-EMPTY:
; CHECK-NEXT: NULL
; CHECK-EMPTY:
; CHECK-NEXT: DW_TAG_LLVM_annotation
; CHECK-NEXT: DW_AT_name ("btf_decl_tag")
; CHECK-NEXT: DW_AT_const_value ("tag1")
; CHECK-EMPTY:
; CHECK-NEXT: DW_TAG_LLVM_annotation
; CHECK-NEXT: DW_AT_name ("btf_decl_tag")
; CHECK-NEXT: DW_AT_const_value ("tag2")
; CHECK-EMPTY:
; CHECK-NEXT: NULL
!17 = !DISubroutineType(types: !18)
!18 = !{!6, !19}
!19 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !20, size: 64)
!20 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "t1", file: !3, line: 4, size: 32, elements: !21, annotations: !7)
!21 = !{!22}
!22 = !DIDerivedType(tag: DW_TAG_member, name: "a", scope: !20, file: !3, line: 5, baseType: !6, size: 32, annotations: !7)
; CHECK: DW_TAG_structure_type
; CHECK-NEXT: DW_AT_name ("t1")
; CHECK: DW_TAG_member
; CHECK-NEXT: DW_AT_name ("a")
; CHECK: DW_TAG_LLVM_annotation
; CHECK-NEXT: DW_AT_name ("btf_decl_tag")
; CHECK-NEXT: DW_AT_const_value ("tag1")
; CHECK-EMPTY:
; CHECK-NEXT: DW_TAG_LLVM_annotation
; CHECK-NEXT: DW_AT_name ("btf_decl_tag")
; CHECK-NEXT: DW_AT_const_value ("tag2")
; CHECK-EMPTY:
; CHECK-NEXT: NULL
; CHECK-EMPTY:
; CHECK-NEXT: DW_TAG_LLVM_annotation
; CHECK-NEXT: DW_AT_name ("btf_decl_tag")
; CHECK-NEXT: DW_AT_const_value ("tag1")
; CHECK-EMPTY:
; CHECK-NEXT: DW_TAG_LLVM_annotation
; CHECK-NEXT: DW_AT_name ("btf_decl_tag")
; CHECK-NEXT: DW_AT_const_value ("tag2")
; CHECK-EMPTY:
; CHECK-NEXT: NULL
!23 = !DILocalVariable(name: "arg", arg: 1, scope: !16, file: !3, line: 10, type: !19, annotations: !7)
!24 = !DILocation(line: 10, column: 48, scope: !16)
!25 = !DILocation(line: 11, column: 10, scope: !16)
!26 = !DILocation(line: 11, column: 15, scope: !16)
!27 = !DILocation(line: 11, column: 3, scope: !16)
|
