| blob | 310a07a079c2f5e57be5a8338ee422e59ac93af6 |
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 net_device *dev;
7 ; };
8 ; #define _(x) (__builtin_preserve_access_index(x))
9 ; static int (*bpf_probe_read)(void *dst, int size, void *unsafe_ptr)
10 ; = (void *) 4;
11 ;
12 ; int bpf_prog(struct sk_buff *ctx) {
13 ; struct net_device *dev = 0;
14 ; bpf_probe_read(&dev, sizeof(dev), _(&ctx->dev));
15 ; return dev != 0;
16 ; }
17 ; Compilation flag:
18 ; clang -target bpf -O2 -g -S -emit-llvm test.c
20 %struct.sk_buff = type { i32, %struct.net_device* }
21 %struct.net_device = type opaque
23 ; Function Attrs: nounwind
24 define dso_local i32 @bpf_prog(%struct.sk_buff*) local_unnamed_addr #0 !dbg !15 {
25 %2 = alloca %struct.net_device*, align 8
26 call void @llvm.dbg.value(metadata %struct.sk_buff* %0, metadata !26, metadata !DIExpression()), !dbg !28
27 %3 = bitcast %struct.net_device** %2 to i8*, !dbg !29
28 call void @llvm.lifetime.start.p0i8(i64 8, i8* nonnull %3) #4, !dbg !29
29 call void @llvm.dbg.value(metadata %struct.net_device* null, metadata !27, metadata !DIExpression()), !dbg !28
30 store %struct.net_device* null, %struct.net_device** %2, align 8, !dbg !30, !tbaa !31
31 %4 = tail call %struct.net_device** @llvm.preserve.struct.access.index.p0p0s_struct.net_devices.p0s_struct.sk_buffs(%struct.sk_buff* %0, i32 1, i32 1), !dbg !35, !llvm.preserve.access.index !19
32 %5 = bitcast %struct.net_device** %4 to i8*, !dbg !35
33 %6 = call i32 inttoptr (i64 4 to i32 (i8*, i32, i8*)*)(i8* nonnull %3, i32 8, i8* %5) #4, !dbg !36
34 %7 = load %struct.net_device*, %struct.net_device** %2, align 8, !dbg !37, !tbaa !31
35 call void @llvm.dbg.value(metadata %struct.net_device* %7, metadata !27, metadata !DIExpression()), !dbg !28
36 %8 = icmp ne %struct.net_device* %7, null, !dbg !38
37 %9 = zext i1 %8 to i32, !dbg !38
38 call void @llvm.lifetime.end.p0i8(i64 8, i8* nonnull %3) #4, !dbg !39
39 ret i32 %9, !dbg !40
40 }
42 ; CHECK: .section .BTF,"",@progbits
43 ; CHECK-NEXT: .short 60319 # 0xeb9f
44 ; CHECK-NEXT: .byte 1
45 ; CHECK-NEXT: .byte 0
46 ; CHECK-NEXT: .long 24
47 ; CHECK-NEXT: .long 0
48 ; CHECK-NEXT: .long 120
49 ; CHECK-NEXT: .long 120
50 ; CHECK-NEXT: .long 90
51 ; CHECK-NEXT: .long 0 # BTF_KIND_PTR(id = 1)
52 ; CHECK-NEXT: .long 33554432 # 0x2000000
53 ; CHECK-NEXT: .long 2
54 ; CHECK-NEXT: .long 1 # BTF_KIND_STRUCT(id = 2)
55 ; CHECK-NEXT: .long 67108866 # 0x4000002
56 ; CHECK-NEXT: .long 16
57 ; CHECK-NEXT: .long 9
58 ; CHECK-NEXT: .long 3
59 ; CHECK-NEXT: .long 0 # 0x0
60 ; CHECK-NEXT: .long 11
61 ; CHECK-NEXT: .long 4
62 ; CHECK-NEXT: .long 64 # 0x40
63 ; CHECK-NEXT: .long 15 # BTF_KIND_INT(id = 3)
64 ; CHECK-NEXT: .long 16777216 # 0x1000000
65 ; CHECK-NEXT: .long 4
66 ; CHECK-NEXT: .long 16777248 # 0x1000020
67 ; CHECK-NEXT: .long 0 # BTF_KIND_PTR(id = 4)
68 ; CHECK-NEXT: .long 33554432 # 0x2000000
69 ; CHECK-NEXT: .long 5
70 ; CHECK-NEXT: .long 19 # BTF_KIND_FWD(id = 5)
71 ; CHECK-NEXT: .long 117440512 # 0x7000000
72 ; CHECK-NEXT: .long 0
73 ; CHECK-NEXT: .long 0 # BTF_KIND_FUNC_PROTO(id = 6)
74 ; CHECK-NEXT: .long 218103809 # 0xd000001
75 ; CHECK-NEXT: .long 3
76 ; CHECK-NEXT: .long 30
77 ; CHECK-NEXT: .long 1
78 ; CHECK-NEXT: .long 34 # BTF_KIND_FUNC(id = 7)
79 ; CHECK-NEXT: .long 201326592 # 0xc000000
80 ; CHECK-NEXT: .long 6
81 ; CHECK-NEXT: .byte 0 # string offset=0
82 ; CHECK-NEXT: .ascii "sk_buff" # string offset=1
83 ; CHECK-NEXT: .byte 0
84 ; CHECK-NEXT: .byte 105 # string offset=9
85 ; CHECK-NEXT: .byte 0
86 ; CHECK-NEXT: .ascii "dev" # string offset=11
87 ; CHECK-NEXT: .byte 0
88 ; CHECK-NEXT: .ascii "int" # string offset=15
89 ; CHECK-NEXT: .byte 0
90 ; CHECK-NEXT: .ascii "net_device" # string offset=19
91 ; CHECK-NEXT: .byte 0
92 ; CHECK-NEXT: .ascii "ctx" # string offset=30
93 ; CHECK-NEXT: .byte 0
94 ; CHECK-NEXT: .ascii "bpf_prog" # string offset=34
95 ; CHECK-NEXT: .byte 0
96 ; CHECK-NEXT: .ascii ".text" # string offset=43
97 ; CHECK-NEXT: .byte 0
98 ; CHECK-NEXT: .ascii "/tmp/home/yhs/work/tests/llvm/test.c" # string offset=49
99 ; CHECK-NEXT: .byte 0
100 ; CHECK-NEXT: .ascii "0:1" # string offset=86
101 ; CHECK-NEXT: .byte 0
102 ; CHECK-NEXT: .section .BTF.ext,"",@progbits
103 ; CHECK-NEXT: .short 60319 # 0xeb9f
104 ; CHECK-NEXT: .byte 1
105 ; CHECK-NEXT: .byte 0
106 ; CHECK-NEXT: .long 32
107 ; CHECK-NEXT: .long 0
108 ; CHECK-NEXT: .long 20
109 ; CHECK-NEXT: .long 20
110 ; CHECK-NEXT: .long 124
111 ; CHECK-NEXT: .long 144
112 ; CHECK-NEXT: .long 28
113 ; CHECK-NEXT: .long 8 # FuncInfo
115 ; CHECK: .long 16 # FieldReloc
116 ; CHECK-NEXT: .long 43 # Field reloc section string offset=43
117 ; CHECK-NEXT: .long 1
118 ; CHECK-NEXT: .long .Ltmp{{[0-9]+}}
119 ; CHECK-NEXT: .long 2
120 ; CHECK-NEXT: .long 86
121 ; CHECK-NEXT: .long 0
123 ; Function Attrs: argmemonly nounwind
124 declare void @llvm.lifetime.start.p0i8(i64 immarg, i8* nocapture) #1
126 ; Function Attrs: nounwind readnone
127 declare %struct.net_device** @llvm.preserve.struct.access.index.p0p0s_struct.net_devices.p0s_struct.sk_buffs(%struct.sk_buff*, i32 immarg, i32 immarg) #2
129 ; Function Attrs: argmemonly nounwind
130 declare void @llvm.lifetime.end.p0i8(i64 immarg, i8* nocapture) #1
132 ; Function Attrs: nounwind readnone speculatable
133 declare void @llvm.dbg.value(metadata, metadata, metadata) #3
135 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" }
136 attributes #1 = { argmemonly nounwind }
137 attributes #2 = { nounwind readnone }
138 attributes #3 = { nounwind readnone speculatable }
139 attributes #4 = { nounwind }
141 !llvm.dbg.cu = !{!0}
142 !llvm.module.flags = !{!11, !12, !13}
143 !llvm.ident = !{!14}
145 !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)
146 !1 = !DIFile(filename: "test.c", directory: "/tmp/home/yhs/work/tests/llvm")
147 !2 = !{}
148 !3 = !{!4}
149 !4 = !DIGlobalVariableExpression(var: !5, expr: !DIExpression())
150 !5 = distinct !DIGlobalVariable(name: "bpf_probe_read", scope: !0, file: !1, line: 6, type: !6, isLocal: true, isDefinition: true)
151 !6 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !7, size: 64)
152 !7 = !DISubroutineType(types: !8)
153 !8 = !{!9, !10, !9, !10}
154 !9 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
155 !10 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: null, size: 64)
156 !11 = !{i32 2, !"Dwarf Version", i32 4}
157 !12 = !{i32 2, !"Debug Info Version", i32 3}
158 !13 = !{i32 1, !"wchar_size", i32 4}
159 !14 = !{!"clang version 9.0.0 (trunk 360739) (llvm/trunk 360747)"}
160 !15 = distinct !DISubprogram(name: "bpf_prog", scope: !1, file: !1, line: 9, type: !16, scopeLine: 9, flags: DIFlagPrototyped, isLocal: false, isDefinition: true, isOptimized: true, unit: !0, retainedNodes: !25)
161 !16 = !DISubroutineType(types: !17)
162 !17 = !{!9, !18}
163 !18 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !19, size: 64)
164 !19 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "sk_buff", file: !1, line: 1, size: 128, elements: !20)
165 !20 = !{!21, !22}
166 !21 = !DIDerivedType(tag: DW_TAG_member, name: "i", scope: !19, file: !1, line: 2, baseType: !9, size: 32)
167 !22 = !DIDerivedType(tag: DW_TAG_member, name: "dev", scope: !19, file: !1, line: 3, baseType: !23, size: 64, offset: 64)
168 !23 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !24, size: 64)
169 !24 = !DICompositeType(tag: DW_TAG_structure_type, name: "net_device", file: !1, line: 3, flags: DIFlagFwdDecl)
170 !25 = !{!26, !27}
171 !26 = !DILocalVariable(name: "ctx", arg: 1, scope: !15, file: !1, line: 9, type: !18)
172 !27 = !DILocalVariable(name: "dev", scope: !15, file: !1, line: 10, type: !23)
173 !28 = !DILocation(line: 0, scope: !15)
174 !29 = !DILocation(line: 10, column: 3, scope: !15)
175 !30 = !DILocation(line: 10, column: 22, scope: !15)
176 !31 = !{!32, !32, i64 0}
177 !32 = !{!"any pointer", !33, i64 0}
178 !33 = !{!"omnipotent char", !34, i64 0}
179 !34 = !{!"Simple C/C++ TBAA"}
180 !35 = !DILocation(line: 11, column: 37, scope: !15)
181 !36 = !DILocation(line: 11, column: 3, scope: !15)
182 !37 = !DILocation(line: 12, column: 10, scope: !15)
183 !38 = !DILocation(line: 12, column: 14, scope: !15)
184 !39 = !DILocation(line: 13, column: 1, scope: !15)
185 !40 = !DILocation(line: 12, column: 3, scope: !15)