| blob | 8ebbfeaac6a27a68c5ed34789051d6b3c19bdfe7 |
1 ; RUN: opt -O2 %s | llvm-dis > %t1
2 ; RUN: llc -filetype=asm -o - %t1 | FileCheck -check-prefixes=CHECK %s
3 ; RUN: llc -mattr=+alu32 -filetype=asm -o - %t1 | FileCheck -check-prefixes=CHECK %s
4 ; Source code:
5 ; struct sk_buff {
6 ; int i;
7 ; struct {
8 ; int dev_id;
9 ; int others;
10 ; } dev[10];
11 ; };
12 ; #define _(x) (__builtin_preserve_access_index(x))
13 ; static int (*bpf_probe_read)(ptr dst, int size, ptr unsafe_ptr)
14 ; = (ptr) 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 -Xclang -disable-llvm-passes test.c
24 target triple = "bpf"
26 %struct.sk_buff = type { i32, [10 x %struct.anon] }
27 %struct.anon = type { i32, i32 }
29 ; Function Attrs: nounwind
30 define dso_local i32 @bpf_prog(ptr) local_unnamed_addr #0 !dbg !15 {
31 %2 = alloca i32, align 4
32 call void @llvm.dbg.value(metadata ptr %0, metadata !31, metadata !DIExpression()), !dbg !33
33 call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %2) #4, !dbg !34
34 %3 = tail call ptr @llvm.preserve.struct.access.index.p0.anons.p0.sk_buffs(ptr elementtype(%struct.sk_buff) %0, i32 1, i32 1), !dbg !35, !llvm.preserve.access.index !19
35 %4 = tail call ptr @llvm.preserve.array.access.index.p0.anons.p0.anons(ptr elementtype([10 x %struct.anon]) %3, i32 1, i32 5), !dbg !35, !llvm.preserve.access.index !23
36 %5 = tail call ptr @llvm.preserve.struct.access.index.p0.p0.anons(ptr elementtype(%struct.anon) %4, i32 0, i32 0), !dbg !35, !llvm.preserve.access.index !24
37 %6 = call i32 inttoptr (i64 4 to ptr)(ptr nonnull %2, i32 4, ptr %5) #4, !dbg !36
38 %7 = load i32, ptr %2, align 4, !dbg !37, !tbaa !38
39 call void @llvm.dbg.value(metadata i32 %7, metadata !32, metadata !DIExpression()), !dbg !33
40 call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %2) #4, !dbg !42
41 ret i32 %7, !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 117
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 0 # BTF_KIND_STRUCT(id = 4)
70 ; CHECK-NEXT: .long 67108866 # 0x4000002
71 ; CHECK-NEXT: .long 8
72 ; CHECK-NEXT: .long 19
73 ; CHECK-NEXT: .long 3
74 ; CHECK-NEXT: .long 0 # 0x0
75 ; CHECK-NEXT: .long 26
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 33 # 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 53
92 ; CHECK-NEXT: .long 1
93 ; CHECK-NEXT: .long 57 # BTF_KIND_FUNC(id = 8)
94 ; CHECK-NEXT: .long 201326593 # 0xc000001
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 "dev_id" # string offset=19
106 ; CHECK-NEXT: .byte 0
107 ; CHECK-NEXT: .ascii "others" # string offset=26
108 ; CHECK-NEXT: .byte 0
109 ; CHECK-NEXT: .ascii "__ARRAY_SIZE_TYPE__" # string offset=33
110 ; CHECK-NEXT: .byte 0
111 ; CHECK-NEXT: .ascii "ctx" # string offset=53
112 ; CHECK-NEXT: .byte 0
113 ; CHECK-NEXT: .ascii "bpf_prog" # string offset=57
114 ; CHECK-NEXT: .byte 0
115 ; CHECK-NEXT: .ascii ".text" # string offset=66
116 ; CHECK-NEXT: .byte 0
117 ; CHECK-NEXT: .ascii "/tmp/home/yhs/work/tests/llvm/test.c" # string offset=72
118 ; CHECK-NEXT: .byte 0
119 ; CHECK-NEXT: .ascii "0:1:5:0" # string offset=109
120 ; CHECK-NEXT: .byte 0
121 ; CHECK-NEXT: .section .BTF.ext,"",@progbits
122 ; CHECK-NEXT: .short 60319 # 0xeb9f
123 ; CHECK-NEXT: .byte 1
124 ; CHECK-NEXT: .byte 0
125 ; CHECK-NEXT: .long 32
126 ; CHECK-NEXT: .long 0
127 ; CHECK-NEXT: .long 20
128 ; CHECK-NEXT: .long 20
129 ; CHECK-NEXT: .long {{[0-9]+}}
130 ; CHECK-NEXT: .long {{[0-9]+}}
131 ; CHECK-NEXT: .long 28
132 ; CHECK-NEXT: .long 8 # FuncInfo
134 ; CHECK: .long 16 # FieldReloc
135 ; CHECK-NEXT: .long 66 # Field reloc section string offset=66
136 ; CHECK-NEXT: .long 1
137 ; CHECK-NEXT: .long .Ltmp{{[0-9]+}}
138 ; CHECK-NEXT: .long 2
139 ; CHECK-NEXT: .long 109
140 ; CHECK-NEXT: .long 0
142 ; Function Attrs: argmemonly nounwind
143 declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1
145 ; Function Attrs: nounwind readnone
146 declare ptr @llvm.preserve.struct.access.index.p0.anons.p0.sk_buffs(ptr, i32 immarg, i32 immarg) #2
148 ; Function Attrs: nounwind readnone
149 declare ptr @llvm.preserve.array.access.index.p0.anons.p0.anons(ptr, i32 immarg, i32 immarg) #2
151 ; Function Attrs: nounwind readnone
152 declare ptr @llvm.preserve.struct.access.index.p0.p0.anons(ptr, i32 immarg, i32 immarg) #2
154 ; Function Attrs: argmemonly nounwind
155 declare void @llvm.lifetime.end.p0(i64 immarg, ptr 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" "frame-pointer"="all" "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)