| blob | d4590bb8a59e940634d09a6e3e9275bab1793749 |
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 ; struct net_device {
5 ; int dev_id;
6 ; int others;
7 ; };
8 ; struct sk_buff {
9 ; int i;
10 ; struct net_device dev[10];
11 ; };
12 ; #define _(x) (__builtin_preserve_access_index(x))
13 ; static int (*bpf_probe_read)(void *dst, int size, void *unsafe_ptr)
14 ; = (void *) 4;
15 ;
16 ; int bpf_prog(struct sk_buff *ctx) {
17 ; int dev_id;
18 ; bpf_probe_read(&dev_id, sizeof(int), _(&ctx->dev[5].dev_id));
19 ; return dev_id;
20 ; }
21 ; Compilation flag:
22 ; clang -target bpf -O2 -g -S -emit-llvm test.c
24 %struct.sk_buff = type { i32, [10 x %struct.net_device] }
25 %struct.net_device = type { i32, i32 }
27 ; Function Attrs: nounwind
28 define dso_local i32 @bpf_prog(%struct.sk_buff*) local_unnamed_addr #0 !dbg !15 {
29 %2 = alloca i32, align 4
30 call void @llvm.dbg.value(metadata %struct.sk_buff* %0, metadata !31, metadata !DIExpression()), !dbg !33
31 %3 = bitcast i32* %2 to i8*, !dbg !34
32 call void @llvm.lifetime.start.p0i8(i64 4, i8* nonnull %3) #4, !dbg !34
33 %4 = tail call [10 x %struct.net_device]* @llvm.preserve.struct.access.index.p0a10s_struct.net_devices.p0s_struct.sk_buffs(%struct.sk_buff* %0, i32 1, i32 1), !dbg !35, !llvm.preserve.access.index !19
34 %5 = tail call %struct.net_device* @llvm.preserve.array.access.index.p0s_struct.net_devices.p0a10s_struct.net_devices([10 x %struct.net_device]* %4, i32 1, i32 5), !dbg !35, !llvm.preserve.access.index !23
35 %6 = tail call i32* @llvm.preserve.struct.access.index.p0i32.p0s_struct.net_devices(%struct.net_device* %5, i32 0, i32 0), !dbg !35, !llvm.preserve.access.index !24
36 %7 = bitcast i32* %6 to i8*, !dbg !35
37 %8 = call i32 inttoptr (i64 4 to i32 (i8*, i32, i8*)*)(i8* nonnull %3, i32 4, i8* %7) #4, !dbg !36
38 %9 = load i32, i32* %2, align 4, !dbg !37, !tbaa !38
39 call void @llvm.dbg.value(metadata i32 %9, metadata !32, metadata !DIExpression()), !dbg !33
40 call void @llvm.lifetime.end.p0i8(i64 4, i8* nonnull %3) #4, !dbg !42
41 ret i32 %9, !dbg !43
42 }
44 ; CHECK: .section .BTF,"",@progbits
45 ; CHECK-NEXT: .short 60319 # 0xeb9f
46 ; CHECK-NEXT: .byte 1
47 ; CHECK-NEXT: .byte 0
48 ; CHECK-NEXT: .long 24
49 ; CHECK-NEXT: .long 0
50 ; CHECK-NEXT: .long 172
51 ; CHECK-NEXT: .long 172
52 ; CHECK-NEXT: .long 128
53 ; CHECK-NEXT: .long 0 # BTF_KIND_PTR(id = 1)
54 ; CHECK-NEXT: .long 33554432 # 0x2000000
55 ; CHECK-NEXT: .long 2
56 ; CHECK-NEXT: .long 1 # BTF_KIND_STRUCT(id = 2)
57 ; CHECK-NEXT: .long 67108866 # 0x4000002
58 ; CHECK-NEXT: .long 84
59 ; CHECK-NEXT: .long 9
60 ; CHECK-NEXT: .long 3
61 ; CHECK-NEXT: .long 0 # 0x0
62 ; CHECK-NEXT: .long 11
63 ; CHECK-NEXT: .long 5
64 ; CHECK-NEXT: .long 32 # 0x20
65 ; CHECK-NEXT: .long 15 # BTF_KIND_INT(id = 3)
66 ; CHECK-NEXT: .long 16777216 # 0x1000000
67 ; CHECK-NEXT: .long 4
68 ; CHECK-NEXT: .long 16777248 # 0x1000020
69 ; CHECK-NEXT: .long 19 # BTF_KIND_STRUCT(id = 4)
70 ; CHECK-NEXT: .long 67108866 # 0x4000002
71 ; CHECK-NEXT: .long 8
72 ; CHECK-NEXT: .long 30
73 ; CHECK-NEXT: .long 3
74 ; CHECK-NEXT: .long 0 # 0x0
75 ; CHECK-NEXT: .long 37
76 ; CHECK-NEXT: .long 3
77 ; CHECK-NEXT: .long 32 # 0x20
78 ; CHECK-NEXT: .long 0 # BTF_KIND_ARRAY(id = 5)
79 ; CHECK-NEXT: .long 50331648 # 0x3000000
80 ; CHECK-NEXT: .long 0
81 ; CHECK-NEXT: .long 4
82 ; CHECK-NEXT: .long 6
83 ; CHECK-NEXT: .long 10
84 ; CHECK-NEXT: .long 44 # BTF_KIND_INT(id = 6)
85 ; CHECK-NEXT: .long 16777216 # 0x1000000
86 ; CHECK-NEXT: .long 4
87 ; CHECK-NEXT: .long 32 # 0x20
88 ; CHECK-NEXT: .long 0 # BTF_KIND_FUNC_PROTO(id = 7)
89 ; CHECK-NEXT: .long 218103809 # 0xd000001
90 ; CHECK-NEXT: .long 3
91 ; CHECK-NEXT: .long 64
92 ; CHECK-NEXT: .long 1
93 ; CHECK-NEXT: .long 68 # BTF_KIND_FUNC(id = 8)
94 ; CHECK-NEXT: .long 201326592 # 0xc000000
95 ; CHECK-NEXT: .long 7
96 ; CHECK-NEXT: .byte 0 # string offset=0
97 ; CHECK-NEXT: .ascii "sk_buff" # string offset=1
98 ; CHECK-NEXT: .byte 0
99 ; CHECK-NEXT: .byte 105 # string offset=9
100 ; CHECK-NEXT: .byte 0
101 ; CHECK-NEXT: .ascii "dev" # string offset=11
102 ; CHECK-NEXT: .byte 0
103 ; CHECK-NEXT: .ascii "int" # string offset=15
104 ; CHECK-NEXT: .byte 0
105 ; CHECK-NEXT: .ascii "net_device" # string offset=19
106 ; CHECK-NEXT: .byte 0
107 ; CHECK-NEXT: .ascii "dev_id" # string offset=30
108 ; CHECK-NEXT: .byte 0
109 ; CHECK-NEXT: .ascii "others" # string offset=37
110 ; CHECK-NEXT: .byte 0
111 ; CHECK-NEXT: .ascii "__ARRAY_SIZE_TYPE__" # string offset=44
112 ; CHECK-NEXT: .byte 0
113 ; CHECK-NEXT: .ascii "ctx" # string offset=64
114 ; CHECK-NEXT: .byte 0
115 ; CHECK-NEXT: .ascii "bpf_prog" # string offset=68
116 ; CHECK-NEXT: .byte 0
117 ; CHECK-NEXT: .ascii ".text" # string offset=77
118 ; CHECK-NEXT: .byte 0
119 ; CHECK-NEXT: .ascii "/tmp/home/yhs/work/tests/llvm/test.c" # string offset=83
120 ; CHECK-NEXT: .byte 0
121 ; CHECK-NEXT: .ascii "0:1:5:0" # string offset=120
122 ; CHECK-NEXT: .byte 0
123 ; CHECK-NEXT: .section .BTF.ext,"",@progbits
124 ; CHECK-NEXT: .short 60319 # 0xeb9f
125 ; CHECK-NEXT: .byte 1
126 ; CHECK-NEXT: .byte 0
127 ; CHECK-NEXT: .long 32
128 ; CHECK-NEXT: .long 0
129 ; CHECK-NEXT: .long 20
130 ; CHECK-NEXT: .long 20
131 ; CHECK-NEXT: .long 76
132 ; CHECK-NEXT: .long 96
133 ; CHECK-NEXT: .long 28
134 ; CHECK-NEXT: .long 8 # FuncInfo
136 ; CHECK: .long 16 # FieldReloc
137 ; CHECK-NEXT: .long 77 # Field reloc section string offset=77
138 ; CHECK-NEXT: .long 1
139 ; CHECK-NEXT: .long .Ltmp{{[0-9]+}}
140 ; CHECK-NEXT: .long 2
141 ; CHECK-NEXT: .long 120
142 ; CHECK-NEXT: .long 0
144 ; Function Attrs: argmemonly nounwind
145 declare void @llvm.lifetime.start.p0i8(i64 immarg, i8* nocapture) #1
147 ; Function Attrs: nounwind readnone
148 declare [10 x %struct.net_device]* @llvm.preserve.struct.access.index.p0a10s_struct.net_devices.p0s_struct.sk_buffs(%struct.sk_buff*, i32 immarg, i32 immarg) #2
150 ; Function Attrs: nounwind readnone
151 declare %struct.net_device* @llvm.preserve.array.access.index.p0s_struct.net_devices.p0a10s_struct.net_devices([10 x %struct.net_device]*, i32 immarg, i32 immarg) #2
153 ; Function Attrs: nounwind readnone
154 declare i32* @llvm.preserve.struct.access.index.p0i32.p0s_struct.net_devices(%struct.net_device*, i32 immarg, i32 immarg) #2
156 ; Function Attrs: argmemonly nounwind
157 declare void @llvm.lifetime.end.p0i8(i64 immarg, i8* nocapture) #1
159 ; Function Attrs: nounwind readnone speculatable
160 declare void @llvm.dbg.value(metadata, metadata, metadata) #3
162 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" }
163 attributes #1 = { argmemonly nounwind }
164 attributes #2 = { nounwind readnone }
165 attributes #3 = { nounwind readnone speculatable }
166 attributes #4 = { nounwind }
168 !llvm.dbg.cu = !{!0}
169 !llvm.module.flags = !{!11, !12, !13}
170 !llvm.ident = !{!14}
172 !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)
173 !1 = !DIFile(filename: "test.c", directory: "/tmp/home/yhs/work/tests/llvm")
174 !2 = !{}
175 !3 = !{!4}
176 !4 = !DIGlobalVariableExpression(var: !5, expr: !DIExpression())
177 !5 = distinct !DIGlobalVariable(name: "bpf_probe_read", scope: !0, file: !1, line: 10, type: !6, isLocal: true, isDefinition: true)
178 !6 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !7, size: 64)
179 !7 = !DISubroutineType(types: !8)
180 !8 = !{!9, !10, !9, !10}
181 !9 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
182 !10 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: null, size: 64)
183 !11 = !{i32 2, !"Dwarf Version", i32 4}
184 !12 = !{i32 2, !"Debug Info Version", i32 3}
185 !13 = !{i32 1, !"wchar_size", i32 4}
186 !14 = !{!"clang version 9.0.0 (trunk 360739) (llvm/trunk 360747)"}
187 !15 = distinct !DISubprogram(name: "bpf_prog", scope: !1, file: !1, line: 13, type: !16, scopeLine: 13, flags: DIFlagPrototyped, isLocal: false, isDefinition: true, isOptimized: true, unit: !0, retainedNodes: !30)
188 !16 = !DISubroutineType(types: !17)
189 !17 = !{!9, !18}
190 !18 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !19, size: 64)
191 !19 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "sk_buff", file: !1, line: 5, size: 672, elements: !20)
192 !20 = !{!21, !22}
193 !21 = !DIDerivedType(tag: DW_TAG_member, name: "i", scope: !19, file: !1, line: 6, baseType: !9, size: 32)
194 !22 = !DIDerivedType(tag: DW_TAG_member, name: "dev", scope: !19, file: !1, line: 7, baseType: !23, size: 640, offset: 32)
195 !23 = !DICompositeType(tag: DW_TAG_array_type, baseType: !24, size: 640, elements: !28)
196 !24 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "net_device", file: !1, line: 1, size: 64, elements: !25)
197 !25 = !{!26, !27}
198 !26 = !DIDerivedType(tag: DW_TAG_member, name: "dev_id", scope: !24, file: !1, line: 2, baseType: !9, size: 32)
199 !27 = !DIDerivedType(tag: DW_TAG_member, name: "others", scope: !24, file: !1, line: 3, baseType: !9, size: 32, offset: 32)
200 !28 = !{!29}
201 !29 = !DISubrange(count: 10)
202 !30 = !{!31, !32}
203 !31 = !DILocalVariable(name: "ctx", arg: 1, scope: !15, file: !1, line: 13, type: !18)
204 !32 = !DILocalVariable(name: "dev_id", scope: !15, file: !1, line: 14, type: !9)
205 !33 = !DILocation(line: 0, scope: !15)
206 !34 = !DILocation(line: 14, column: 3, scope: !15)
207 !35 = !DILocation(line: 15, column: 40, scope: !15)
208 !36 = !DILocation(line: 15, column: 3, scope: !15)
209 !37 = !DILocation(line: 16, column: 10, scope: !15)
210 !38 = !{!39, !39, i64 0}
211 !39 = !{!"int", !40, i64 0}
212 !40 = !{!"omnipotent char", !41, i64 0}
213 !41 = !{!"Simple C/C++ TBAA"}
214 !42 = !DILocation(line: 17, column: 1, scope: !15)
215 !43 = !DILocation(line: 16, column: 3, scope: !15)