| blob | 08a204f77896516f8e360e7a6dc169bbab1c9f06 |
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 sk_buff {
5 ; int i;
6 ; struct {
7 ; int dev_id;
8 ; int others;
9 ; } dev[10];
10 ; };
11 ; #define _(x) (__builtin_preserve_access_index(x))
12 ; static int (*bpf_probe_read)(void *dst, int size, void *unsafe_ptr)
13 ; = (void *) 4;
14 ;
15 ; int bpf_prog(struct sk_buff *ctx) {
16 ; int dev_id;
17 ; bpf_probe_read(&dev_id, sizeof(int), _(&ctx->dev[5].dev_id));
18 ; return dev_id;
19 ; }
20 ; Compilation flag:
21 ; clang -target bpf -O2 -g -S -emit-llvm test.c
23 %struct.sk_buff = type { i32, [10 x %struct.anon] }
24 %struct.anon = type { i32, i32 }
26 ; Function Attrs: nounwind
27 define dso_local i32 @bpf_prog(%struct.sk_buff*) local_unnamed_addr #0 !dbg !15 {
28 %2 = alloca i32, align 4
29 call void @llvm.dbg.value(metadata %struct.sk_buff* %0, metadata !31, metadata !DIExpression()), !dbg !33
30 %3 = bitcast i32* %2 to i8*, !dbg !34
31 call void @llvm.lifetime.start.p0i8(i64 4, i8* nonnull %3) #4, !dbg !34
32 %4 = tail call [10 x %struct.anon]* @llvm.preserve.struct.access.index.p0a10s_struct.anons.p0s_struct.sk_buffs(%struct.sk_buff* %0, i32 1, i32 1), !dbg !35, !llvm.preserve.access.index !19
33 %5 = tail call %struct.anon* @llvm.preserve.array.access.index.p0s_struct.anons.p0a10s_struct.anons([10 x %struct.anon]* %4, i32 1, i32 5), !dbg !35, !llvm.preserve.access.index !23
34 %6 = tail call i32* @llvm.preserve.struct.access.index.p0i32.p0s_struct.anons(%struct.anon* %5, i32 0, i32 0), !dbg !35, !llvm.preserve.access.index !24
35 %7 = bitcast i32* %6 to i8*, !dbg !35
36 %8 = call i32 inttoptr (i64 4 to i32 (i8*, i32, i8*)*)(i8* nonnull %3, i32 4, i8* %7) #4, !dbg !36
37 %9 = load i32, i32* %2, align 4, !dbg !37, !tbaa !38
38 call void @llvm.dbg.value(metadata i32 %9, metadata !32, metadata !DIExpression()), !dbg !33
39 call void @llvm.lifetime.end.p0i8(i64 4, i8* nonnull %3) #4, !dbg !42
40 ret i32 %9, !dbg !43
41 }
43 ; CHECK: .section .BTF,"",@progbits
44 ; CHECK-NEXT: .short 60319 # 0xeb9f
45 ; CHECK-NEXT: .byte 1
46 ; CHECK-NEXT: .byte 0
47 ; CHECK-NEXT: .long 24
48 ; CHECK-NEXT: .long 0
49 ; CHECK-NEXT: .long 172
50 ; CHECK-NEXT: .long 172
51 ; CHECK-NEXT: .long 117
52 ; CHECK-NEXT: .long 0 # BTF_KIND_PTR(id = 1)
53 ; CHECK-NEXT: .long 33554432 # 0x2000000
54 ; CHECK-NEXT: .long 2
55 ; CHECK-NEXT: .long 1 # BTF_KIND_STRUCT(id = 2)
56 ; CHECK-NEXT: .long 67108866 # 0x4000002
57 ; CHECK-NEXT: .long 84
58 ; CHECK-NEXT: .long 9
59 ; CHECK-NEXT: .long 3
60 ; CHECK-NEXT: .long 0 # 0x0
61 ; CHECK-NEXT: .long 11
62 ; CHECK-NEXT: .long 5
63 ; CHECK-NEXT: .long 32 # 0x20
64 ; CHECK-NEXT: .long 15 # BTF_KIND_INT(id = 3)
65 ; CHECK-NEXT: .long 16777216 # 0x1000000
66 ; CHECK-NEXT: .long 4
67 ; CHECK-NEXT: .long 16777248 # 0x1000020
68 ; CHECK-NEXT: .long 0 # BTF_KIND_STRUCT(id = 4)
69 ; CHECK-NEXT: .long 67108866 # 0x4000002
70 ; CHECK-NEXT: .long 8
71 ; CHECK-NEXT: .long 19
72 ; CHECK-NEXT: .long 3
73 ; CHECK-NEXT: .long 0 # 0x0
74 ; CHECK-NEXT: .long 26
75 ; CHECK-NEXT: .long 3
76 ; CHECK-NEXT: .long 32 # 0x20
77 ; CHECK-NEXT: .long 0 # BTF_KIND_ARRAY(id = 5)
78 ; CHECK-NEXT: .long 50331648 # 0x3000000
79 ; CHECK-NEXT: .long 0
80 ; CHECK-NEXT: .long 4
81 ; CHECK-NEXT: .long 6
82 ; CHECK-NEXT: .long 10
83 ; CHECK-NEXT: .long 33 # BTF_KIND_INT(id = 6)
84 ; CHECK-NEXT: .long 16777216 # 0x1000000
85 ; CHECK-NEXT: .long 4
86 ; CHECK-NEXT: .long 32 # 0x20
87 ; CHECK-NEXT: .long 0 # BTF_KIND_FUNC_PROTO(id = 7)
88 ; CHECK-NEXT: .long 218103809 # 0xd000001
89 ; CHECK-NEXT: .long 3
90 ; CHECK-NEXT: .long 53
91 ; CHECK-NEXT: .long 1
92 ; CHECK-NEXT: .long 57 # BTF_KIND_FUNC(id = 8)
93 ; CHECK-NEXT: .long 201326592 # 0xc000000
94 ; CHECK-NEXT: .long 7
95 ; CHECK-NEXT: .byte 0 # string offset=0
96 ; CHECK-NEXT: .ascii "sk_buff" # string offset=1
97 ; CHECK-NEXT: .byte 0
98 ; CHECK-NEXT: .byte 105 # string offset=9
99 ; CHECK-NEXT: .byte 0
100 ; CHECK-NEXT: .ascii "dev" # string offset=11
101 ; CHECK-NEXT: .byte 0
102 ; CHECK-NEXT: .ascii "int" # string offset=15
103 ; CHECK-NEXT: .byte 0
104 ; CHECK-NEXT: .ascii "dev_id" # string offset=19
105 ; CHECK-NEXT: .byte 0
106 ; CHECK-NEXT: .ascii "others" # string offset=26
107 ; CHECK-NEXT: .byte 0
108 ; CHECK-NEXT: .ascii "__ARRAY_SIZE_TYPE__" # string offset=33
109 ; CHECK-NEXT: .byte 0
110 ; CHECK-NEXT: .ascii "ctx" # string offset=53
111 ; CHECK-NEXT: .byte 0
112 ; CHECK-NEXT: .ascii "bpf_prog" # string offset=57
113 ; CHECK-NEXT: .byte 0
114 ; CHECK-NEXT: .ascii ".text" # string offset=66
115 ; CHECK-NEXT: .byte 0
116 ; CHECK-NEXT: .ascii "/tmp/home/yhs/work/tests/llvm/test.c" # string offset=72
117 ; CHECK-NEXT: .byte 0
118 ; CHECK-NEXT: .ascii "0:1:5:0" # string offset=109
119 ; CHECK-NEXT: .byte 0
120 ; CHECK-NEXT: .section .BTF.ext,"",@progbits
121 ; CHECK-NEXT: .short 60319 # 0xeb9f
122 ; CHECK-NEXT: .byte 1
123 ; CHECK-NEXT: .byte 0
124 ; CHECK-NEXT: .long 40
125 ; CHECK-NEXT: .long 0
126 ; CHECK-NEXT: .long 20
127 ; CHECK-NEXT: .long 20
128 ; CHECK-NEXT: .long 76
129 ; CHECK-NEXT: .long 96
130 ; CHECK-NEXT: .long 24
131 ; CHECK-NEXT: .long 120
132 ; CHECK-NEXT: .long 0
133 ; CHECK-NEXT: .long 8 # FuncInfo
135 ; CHECK: .long 12 # OffsetReloc
136 ; CHECK-NEXT: .long 66 # Offset reloc section string offset=66
137 ; CHECK-NEXT: .long 1
138 ; CHECK-NEXT: .long .Ltmp2
139 ; CHECK-NEXT: .long 2
140 ; CHECK-NEXT: .long 109
142 ; Function Attrs: argmemonly nounwind
143 declare void @llvm.lifetime.start.p0i8(i64 immarg, i8* nocapture) #1
145 ; Function Attrs: nounwind readnone
146 declare [10 x %struct.anon]* @llvm.preserve.struct.access.index.p0a10s_struct.anons.p0s_struct.sk_buffs(%struct.sk_buff*, i32 immarg, i32 immarg) #2
148 ; Function Attrs: nounwind readnone
149 declare %struct.anon* @llvm.preserve.array.access.index.p0s_struct.anons.p0a10s_struct.anons([10 x %struct.anon]*, i32 immarg, i32 immarg) #2
151 ; Function Attrs: nounwind readnone
152 declare i32* @llvm.preserve.struct.access.index.p0i32.p0s_struct.anons(%struct.anon*, i32 immarg, i32 immarg) #2
154 ; Function Attrs: argmemonly nounwind
155 declare void @llvm.lifetime.end.p0i8(i64 immarg, i8* nocapture) #1
157 ; Function Attrs: nounwind readnone speculatable
158 declare void @llvm.dbg.value(metadata, metadata, metadata) #3
160 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" }
161 attributes #1 = { argmemonly nounwind }
162 attributes #2 = { nounwind readnone }
163 attributes #3 = { nounwind readnone speculatable }
164 attributes #4 = { nounwind }
166 !llvm.dbg.cu = !{!0}
167 !llvm.module.flags = !{!11, !12, !13}
168 !llvm.ident = !{!14}
170 !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)
171 !1 = !DIFile(filename: "test.c", directory: "/tmp/home/yhs/work/tests/llvm")
172 !2 = !{}
173 !3 = !{!4}
174 !4 = !DIGlobalVariableExpression(var: !5, expr: !DIExpression())
175 !5 = distinct !DIGlobalVariable(name: "bpf_probe_read", scope: !0, file: !1, line: 9, type: !6, isLocal: true, isDefinition: true)
176 !6 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !7, size: 64)
177 !7 = !DISubroutineType(types: !8)
178 !8 = !{!9, !10, !9, !10}
179 !9 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
180 !10 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: null, size: 64)
181 !11 = !{i32 2, !"Dwarf Version", i32 4}
182 !12 = !{i32 2, !"Debug Info Version", i32 3}
183 !13 = !{i32 1, !"wchar_size", i32 4}
184 !14 = !{!"clang version 9.0.0 (trunk 360739) (llvm/trunk 360747)"}
185 !15 = distinct !DISubprogram(name: "bpf_prog", scope: !1, file: !1, line: 12, type: !16, scopeLine: 12, flags: DIFlagPrototyped, isLocal: false, isDefinition: true, isOptimized: true, unit: !0, retainedNodes: !30)
186 !16 = !DISubroutineType(types: !17)
187 !17 = !{!9, !18}
188 !18 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !19, size: 64)
189 !19 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "sk_buff", file: !1, line: 1, size: 672, elements: !20)
190 !20 = !{!21, !22}
191 !21 = !DIDerivedType(tag: DW_TAG_member, name: "i", scope: !19, file: !1, line: 2, baseType: !9, size: 32)
192 !22 = !DIDerivedType(tag: DW_TAG_member, name: "dev", scope: !19, file: !1, line: 6, baseType: !23, size: 640, offset: 32)
193 !23 = !DICompositeType(tag: DW_TAG_array_type, baseType: !24, size: 640, elements: !28)
194 !24 = distinct !DICompositeType(tag: DW_TAG_structure_type, scope: !19, file: !1, line: 3, size: 64, elements: !25)
195 !25 = !{!26, !27}
196 !26 = !DIDerivedType(tag: DW_TAG_member, name: "dev_id", scope: !24, file: !1, line: 4, baseType: !9, size: 32)
197 !27 = !DIDerivedType(tag: DW_TAG_member, name: "others", scope: !24, file: !1, line: 5, baseType: !9, size: 32, offset: 32)
198 !28 = !{!29}
199 !29 = !DISubrange(count: 10)
200 !30 = !{!31, !32}
201 !31 = !DILocalVariable(name: "ctx", arg: 1, scope: !15, file: !1, line: 12, type: !18)
202 !32 = !DILocalVariable(name: "dev_id", scope: !15, file: !1, line: 13, type: !9)
203 !33 = !DILocation(line: 0, scope: !15)
204 !34 = !DILocation(line: 13, column: 3, scope: !15)
205 !35 = !DILocation(line: 14, column: 40, scope: !15)
206 !36 = !DILocation(line: 14, column: 3, scope: !15)
207 !37 = !DILocation(line: 15, column: 10, scope: !15)
208 !38 = !{!39, !39, i64 0}
209 !39 = !{!"int", !40, i64 0}
210 !40 = !{!"omnipotent char", !41, i64 0}
211 !41 = !{!"Simple C/C++ TBAA"}
212 !42 = !DILocation(line: 16, column: 1, scope: !15)
213 !43 = !DILocation(line: 15, column: 3, scope: !15)