| blob | 44f687b1a1e9b147edf4d37d9c192b0f67c6b1a8 |
1 ; RUN: llc -march=bpfel -filetype=asm -o - %s | FileCheck -check-prefixes=CHECK %s
2 ; RUN: llc -march=bpfeb -filetype=asm -o - %s | FileCheck -check-prefixes=CHECK %s
3 ; Source code:
4 ; union sk_buff {
5 ; int i;
6 ; struct {
7 ; int netid;
8 ; union {
9 ; int dev_id;
10 ; int others;
11 ; } dev;
12 ; } u;
13 ; };
14 ; #define _(x) (__builtin_preserve_access_index(x))
15 ; static int (*bpf_probe_read)(void *dst, int size, void *unsafe_ptr)
16 ; = (void *) 4;
17 ;
18 ; int bpf_prog(union sk_buff *ctx) {
19 ; int dev_id;
20 ; bpf_probe_read(&dev_id, sizeof(int), _(&ctx->u.dev.dev_id));
21 ; return dev_id;
22 ; }
23 ; Compilation flag:
24 ; clang -target bpf -O2 -g -S -emit-llvm test.c
26 %union.sk_buff = type { %struct.anon }
27 %struct.anon = type { i32, %union.anon }
28 %union.anon = type { i32 }
30 ; Function Attrs: nounwind
31 define dso_local i32 @bpf_prog(%union.sk_buff*) local_unnamed_addr #0 !dbg !15 {
32 %2 = alloca i32, align 4
33 call void @llvm.dbg.value(metadata %union.sk_buff* %0, metadata !32, metadata !DIExpression()), !dbg !34
34 %3 = bitcast i32* %2 to i8*, !dbg !35
35 call void @llvm.lifetime.start.p0i8(i64 4, i8* nonnull %3) #4, !dbg !35
36 %4 = tail call %union.sk_buff* @llvm.preserve.union.access.index.p0s_union.sk_buffs.p0s_union.sk_buffs(%union.sk_buff* %0, i32 1), !dbg !36, !llvm.preserve.access.index !19
37 %5 = getelementptr inbounds %union.sk_buff, %union.sk_buff* %4, i64 0, i32 0, !dbg !36
38 %6 = tail call %union.anon* @llvm.preserve.struct.access.index.p0s_union.anons.p0s_struct.anons(%struct.anon* %5, i32 1, i32 1), !dbg !36, !llvm.preserve.access.index !23
39 %7 = tail call %union.anon* @llvm.preserve.union.access.index.p0s_union.anons.p0s_union.anons(%union.anon* %6, i32 0), !dbg !36, !llvm.preserve.access.index !27
40 %8 = bitcast %union.anon* %7 to i8*, !dbg !36
41 %9 = call i32 inttoptr (i64 4 to i32 (i8*, i32, i8*)*)(i8* nonnull %3, i32 4, i8* %8) #4, !dbg !37
42 %10 = load i32, i32* %2, align 4, !dbg !38, !tbaa !39
43 call void @llvm.dbg.value(metadata i32 %10, metadata !33, metadata !DIExpression()), !dbg !34
44 call void @llvm.lifetime.end.p0i8(i64 4, i8* nonnull %3) #4, !dbg !43
45 ret i32 %10, !dbg !44
46 }
48 ; CHECK: .section .BTF,"",@progbits
49 ; CHECK-NEXT: .short 60319 # 0xeb9f
50 ; CHECK-NEXT: .byte 1
51 ; CHECK-NEXT: .byte 0
52 ; CHECK-NEXT: .long 24
53 ; CHECK-NEXT: .long 0
54 ; CHECK-NEXT: .long 168
55 ; CHECK-NEXT: .long 168
56 ; CHECK-NEXT: .long 105
57 ; CHECK-NEXT: .long 0 # BTF_KIND_PTR(id = 1)
58 ; CHECK-NEXT: .long 33554432 # 0x2000000
59 ; CHECK-NEXT: .long 2
60 ; CHECK-NEXT: .long 1 # BTF_KIND_UNION(id = 2)
61 ; CHECK-NEXT: .long 83886082 # 0x5000002
62 ; CHECK-NEXT: .long 8
63 ; CHECK-NEXT: .long 9
64 ; CHECK-NEXT: .long 3
65 ; CHECK-NEXT: .long 0 # 0x0
66 ; CHECK-NEXT: .long 11
67 ; CHECK-NEXT: .long 4
68 ; CHECK-NEXT: .long 0 # 0x0
69 ; CHECK-NEXT: .long 13 # BTF_KIND_INT(id = 3)
70 ; CHECK-NEXT: .long 16777216 # 0x1000000
71 ; CHECK-NEXT: .long 4
72 ; CHECK-NEXT: .long 16777248 # 0x1000020
73 ; CHECK-NEXT: .long 0 # BTF_KIND_STRUCT(id = 4)
74 ; CHECK-NEXT: .long 67108866 # 0x4000002
75 ; CHECK-NEXT: .long 8
76 ; CHECK-NEXT: .long 17
77 ; CHECK-NEXT: .long 3
78 ; CHECK-NEXT: .long 0 # 0x0
79 ; CHECK-NEXT: .long 23
80 ; CHECK-NEXT: .long 5
81 ; CHECK-NEXT: .long 32 # 0x20
82 ; CHECK-NEXT: .long 0 # BTF_KIND_UNION(id = 5)
83 ; CHECK-NEXT: .long 83886082 # 0x5000002
84 ; CHECK-NEXT: .long 4
85 ; CHECK-NEXT: .long 27
86 ; CHECK-NEXT: .long 3
87 ; CHECK-NEXT: .long 0 # 0x0
88 ; CHECK-NEXT: .long 34
89 ; CHECK-NEXT: .long 3
90 ; CHECK-NEXT: .long 0 # 0x0
91 ; CHECK-NEXT: .long 0 # BTF_KIND_FUNC_PROTO(id = 6)
92 ; CHECK-NEXT: .long 218103809 # 0xd000001
93 ; CHECK-NEXT: .long 3
94 ; CHECK-NEXT: .long 41
95 ; CHECK-NEXT: .long 1
96 ; CHECK-NEXT: .long 45 # BTF_KIND_FUNC(id = 7)
97 ; CHECK-NEXT: .long 201326592 # 0xc000000
98 ; CHECK-NEXT: .long 6
99 ; CHECK-NEXT: .byte 0 # string offset=0
100 ; CHECK-NEXT: .ascii "sk_buff" # string offset=1
101 ; CHECK-NEXT: .byte 0
102 ; CHECK-NEXT: .byte 105 # string offset=9
103 ; CHECK-NEXT: .byte 0
104 ; CHECK-NEXT: .byte 117 # string offset=11
105 ; CHECK-NEXT: .byte 0
106 ; CHECK-NEXT: .ascii "int" # string offset=13
107 ; CHECK-NEXT: .byte 0
108 ; CHECK-NEXT: .ascii "netid" # string offset=17
109 ; CHECK-NEXT: .byte 0
110 ; CHECK-NEXT: .ascii "dev" # string offset=23
111 ; CHECK-NEXT: .byte 0
112 ; CHECK-NEXT: .ascii "dev_id" # string offset=27
113 ; CHECK-NEXT: .byte 0
114 ; CHECK-NEXT: .ascii "others" # string offset=34
115 ; CHECK-NEXT: .byte 0
116 ; CHECK-NEXT: .ascii "ctx" # string offset=41
117 ; CHECK-NEXT: .byte 0
118 ; CHECK-NEXT: .ascii "bpf_prog" # string offset=45
119 ; CHECK-NEXT: .byte 0
120 ; CHECK-NEXT: .ascii ".text" # string offset=54
121 ; CHECK-NEXT: .byte 0
122 ; CHECK-NEXT: .ascii "/tmp/home/yhs/work/tests/llvm/test.c" # string offset=60
123 ; CHECK-NEXT: .byte 0
124 ; CHECK-NEXT: .ascii "0:1:1:0" # string offset=97
125 ; CHECK-NEXT: .byte 0
126 ; CHECK-NEXT: .section .BTF.ext,"",@progbits
127 ; CHECK-NEXT: .short 60319 # 0xeb9f
128 ; CHECK-NEXT: .byte 1
129 ; CHECK-NEXT: .byte 0
130 ; CHECK-NEXT: .long 32
131 ; CHECK-NEXT: .long 0
132 ; CHECK-NEXT: .long 20
133 ; CHECK-NEXT: .long 20
134 ; CHECK-NEXT: .long 76
135 ; CHECK-NEXT: .long 96
136 ; CHECK-NEXT: .long 28
137 ; CHECK-NEXT: .long 8 # FuncInfo
139 ; CHECK: .long 16 # FieldReloc
140 ; CHECK-NEXT: .long 54 # Field reloc section string offset=54
141 ; CHECK-NEXT: .long 1
142 ; CHECK-NEXT: .long .Ltmp{{[0-9]+}}
143 ; CHECK-NEXT: .long 2
144 ; CHECK-NEXT: .long 97
145 ; CHECK-NEXT: .long 0
147 ; Function Attrs: argmemonly nounwind
148 declare void @llvm.lifetime.start.p0i8(i64 immarg, i8* nocapture) #1
150 ; Function Attrs: nounwind readnone
151 declare %union.sk_buff* @llvm.preserve.union.access.index.p0s_union.sk_buffs.p0s_union.sk_buffs(%union.sk_buff*, i32 immarg) #2
153 ; Function Attrs: nounwind readnone
154 declare %union.anon* @llvm.preserve.struct.access.index.p0s_union.anons.p0s_struct.anons(%struct.anon*, i32 immarg, i32 immarg) #2
156 ; Function Attrs: nounwind readnone
157 declare %union.anon* @llvm.preserve.union.access.index.p0s_union.anons.p0s_union.anons(%union.anon*, i32 immarg) #2
159 ; Function Attrs: argmemonly nounwind
160 declare void @llvm.lifetime.end.p0i8(i64 immarg, i8* nocapture) #1
162 ; Function Attrs: nounwind readnone speculatable
163 declare void @llvm.dbg.value(metadata, metadata, metadata) #3
165 attributes #0 = { nounwind "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "less-precise-fpmad"="false" "min-legal-vector-width"="0" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "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" "unsafe-fp-math"="false" "use-soft-float"="false" }
166 attributes #1 = { argmemonly nounwind }
167 attributes #2 = { nounwind readnone }
168 attributes #3 = { nounwind readnone speculatable }
169 attributes #4 = { nounwind }
171 !llvm.dbg.cu = !{!0}
172 !llvm.module.flags = !{!11, !12, !13}
173 !llvm.ident = !{!14}
175 !0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 9.0.0 (trunk 360739) (llvm/trunk 360747)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, globals: !3, nameTableKind: None)
176 !1 = !DIFile(filename: "test.c", directory: "/tmp/home/yhs/work/tests/llvm")
177 !2 = !{}
178 !3 = !{!4}
179 !4 = !DIGlobalVariableExpression(var: !5, expr: !DIExpression())
180 !5 = distinct !DIGlobalVariable(name: "bpf_probe_read", scope: !0, file: !1, line: 12, type: !6, isLocal: true, isDefinition: true)
181 !6 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !7, size: 64)
182 !7 = !DISubroutineType(types: !8)
183 !8 = !{!9, !10, !9, !10}
184 !9 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
185 !10 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: null, size: 64)
186 !11 = !{i32 2, !"Dwarf Version", i32 4}
187 !12 = !{i32 2, !"Debug Info Version", i32 3}
188 !13 = !{i32 1, !"wchar_size", i32 4}
189 !14 = !{!"clang version 9.0.0 (trunk 360739) (llvm/trunk 360747)"}
190 !15 = distinct !DISubprogram(name: "bpf_prog", scope: !1, file: !1, line: 15, type: !16, scopeLine: 15, flags: DIFlagPrototyped, isLocal: false, isDefinition: true, isOptimized: true, unit: !0, retainedNodes: !31)
191 !16 = !DISubroutineType(types: !17)
192 !17 = !{!9, !18}
193 !18 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !19, size: 64)
194 !19 = distinct !DICompositeType(tag: DW_TAG_union_type, name: "sk_buff", file: !1, line: 1, size: 64, elements: !20)
195 !20 = !{!21, !22}
196 !21 = !DIDerivedType(tag: DW_TAG_member, name: "i", scope: !19, file: !1, line: 2, baseType: !9, size: 32)
197 !22 = !DIDerivedType(tag: DW_TAG_member, name: "u", scope: !19, file: !1, line: 9, baseType: !23, size: 64)
198 !23 = distinct !DICompositeType(tag: DW_TAG_structure_type, scope: !19, file: !1, line: 3, size: 64, elements: !24)
199 !24 = !{!25, !26}
200 !25 = !DIDerivedType(tag: DW_TAG_member, name: "netid", scope: !23, file: !1, line: 4, baseType: !9, size: 32)
201 !26 = !DIDerivedType(tag: DW_TAG_member, name: "dev", scope: !23, file: !1, line: 8, baseType: !27, size: 32, offset: 32)
202 !27 = distinct !DICompositeType(tag: DW_TAG_union_type, scope: !23, file: !1, line: 5, size: 32, elements: !28)
203 !28 = !{!29, !30}
204 !29 = !DIDerivedType(tag: DW_TAG_member, name: "dev_id", scope: !27, file: !1, line: 6, baseType: !9, size: 32)
205 !30 = !DIDerivedType(tag: DW_TAG_member, name: "others", scope: !27, file: !1, line: 7, baseType: !9, size: 32)
206 !31 = !{!32, !33}
207 !32 = !DILocalVariable(name: "ctx", arg: 1, scope: !15, file: !1, line: 15, type: !18)
208 !33 = !DILocalVariable(name: "dev_id", scope: !15, file: !1, line: 16, type: !9)
209 !34 = !DILocation(line: 0, scope: !15)
210 !35 = !DILocation(line: 16, column: 3, scope: !15)
211 !36 = !DILocation(line: 17, column: 40, scope: !15)
212 !37 = !DILocation(line: 17, column: 3, scope: !15)
213 !38 = !DILocation(line: 18, column: 10, scope: !15)
214 !39 = !{!40, !40, i64 0}
215 !40 = !{!"int", !41, i64 0}
216 !41 = !{!"omnipotent char", !42, i64 0}
217 !42 = !{!"Simple C/C++ TBAA"}
218 !43 = !DILocation(line: 19, column: 1, scope: !15)
219 !44 = !DILocation(line: 18, column: 3, scope: !15)