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
11 ; struct net_device dev;
13 ; #define _(x) (__builtin_preserve_access_index(x))
14 ; static int (*bpf_probe_read)(ptr dst, int size, ptr unsafe_ptr)
17 ; int bpf_prog(struct sk_buff *ctx) {
19 ; bpf_probe_read(&dev_id, sizeof(int), _(&ctx->dev.dev_id));
23 ; clang -target bpf -O2 -g -S -emit-llvm -Xclang -disable-llvm-passes test.c
27 %struct.sk_buff = type { i32, %struct.net_device }
28 %struct.net_device = type { i32, i32 }
30 ; Function Attrs: nounwind
31 define dso_local i32 @bpf_prog(ptr) local_unnamed_addr #0 !dbg !15 {
32 %2 = alloca i32, align 4
33 call void @llvm.dbg.value(metadata ptr %0, metadata !28, metadata !DIExpression()), !dbg !30
34 call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %2) #4, !dbg !31
35 %3 = tail call ptr @llvm.preserve.struct.access.index.p0.net_devices.p0.sk_buffs(ptr elementtype(%struct.sk_buff) %0, i32 1, i32 1), !dbg !32, !llvm.preserve.access.index !19
36 %4 = tail call ptr @llvm.preserve.struct.access.index.p0.p0.net_devices(ptr elementtype(%struct.net_device) %3, i32 0, i32 0), !dbg !32, !llvm.preserve.access.index !23
37 %5 = call i32 inttoptr (i64 4 to ptr)(ptr nonnull %2, i32 4, ptr %4) #4, !dbg !33
38 %6 = load i32, ptr %2, align 4, !dbg !34, !tbaa !35
39 call void @llvm.dbg.value(metadata i32 %6, metadata !29, metadata !DIExpression()), !dbg !30
40 call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %2) #4, !dbg !39
44 ; CHECK: .section .BTF,"",@progbits
45 ; CHECK-NEXT: .short 60319 # 0xeb9f
48 ; CHECK-NEXT: .long 24
50 ; CHECK-NEXT: .long 132
51 ; CHECK-NEXT: .long 132
52 ; CHECK-NEXT: .long 106
53 ; CHECK-NEXT: .long 0 # BTF_KIND_PTR(id = 1)
54 ; CHECK-NEXT: .long 33554432 # 0x2000000
56 ; CHECK-NEXT: .long 1 # BTF_KIND_STRUCT(id = 2)
57 ; CHECK-NEXT: .long 67108866 # 0x4000002
58 ; CHECK-NEXT: .long 12
61 ; CHECK-NEXT: .long 0 # 0x0
62 ; CHECK-NEXT: .long 11
64 ; CHECK-NEXT: .long 32 # 0x20
65 ; CHECK-NEXT: .long 15 # BTF_KIND_INT(id = 3)
66 ; CHECK-NEXT: .long 16777216 # 0x1000000
68 ; CHECK-NEXT: .long 16777248 # 0x1000020
69 ; CHECK-NEXT: .long 19 # BTF_KIND_STRUCT(id = 4)
70 ; CHECK-NEXT: .long 67108866 # 0x4000002
72 ; CHECK-NEXT: .long 30
74 ; CHECK-NEXT: .long 0 # 0x0
75 ; CHECK-NEXT: .long 37
77 ; CHECK-NEXT: .long 32 # 0x20
78 ; CHECK-NEXT: .long 0 # BTF_KIND_FUNC_PROTO(id = 5)
79 ; CHECK-NEXT: .long 218103809 # 0xd000001
81 ; CHECK-NEXT: .long 44
83 ; CHECK-NEXT: .long 48 # BTF_KIND_FUNC(id = 6)
84 ; CHECK-NEXT: .long 201326593 # 0xc000001
86 ; CHECK-NEXT: .byte 0 # string offset=0
87 ; CHECK-NEXT: .ascii "sk_buff" # string offset=1
89 ; CHECK-NEXT: .byte 105 # string offset=9
91 ; CHECK-NEXT: .ascii "dev" # string offset=11
93 ; CHECK-NEXT: .ascii "int" # string offset=15
95 ; CHECK-NEXT: .ascii "net_device" # string offset=19
97 ; CHECK-NEXT: .ascii "dev_id" # string offset=30
99 ; CHECK-NEXT: .ascii "others" # string offset=37
100 ; CHECK-NEXT: .byte 0
101 ; CHECK-NEXT: .ascii "ctx" # string offset=44
102 ; CHECK-NEXT: .byte 0
103 ; CHECK-NEXT: .ascii "bpf_prog" # string offset=48
104 ; CHECK-NEXT: .byte 0
105 ; CHECK-NEXT: .ascii ".text" # string offset=57
106 ; CHECK-NEXT: .byte 0
107 ; CHECK-NEXT: .ascii "/tmp/home/yhs/work/tests/llvm/test.c" # string offset=63
108 ; CHECK-NEXT: .byte 0
109 ; CHECK-NEXT: .ascii "0:1:0" # string offset=100
110 ; CHECK-NEXT: .byte 0
111 ; CHECK-NEXT: .section .BTF.ext,"",@progbits
112 ; CHECK-NEXT: .short 60319 # 0xeb9f
113 ; CHECK-NEXT: .byte 1
114 ; CHECK-NEXT: .byte 0
115 ; CHECK-NEXT: .long 32
116 ; CHECK-NEXT: .long 0
117 ; CHECK-NEXT: .long 20
118 ; CHECK-NEXT: .long 20
119 ; CHECK-NEXT: .long {{[0-9]+}}
120 ; CHECK-NEXT: .long {{[0-9]+}}
121 ; CHECK-NEXT: .long 28
122 ; CHECK-NEXT: .long 8 # FuncInfo
124 ; CHECK: .long 16 # FieldReloc
125 ; CHECK-NEXT: .long 57 # Field reloc section string offset=57
126 ; CHECK-NEXT: .long 1
127 ; CHECK-NEXT: .long .Ltmp{{[0-9]+}}
128 ; CHECK-NEXT: .long 2
129 ; CHECK-NEXT: .long 100
130 ; CHECK-NEXT: .long 0
132 ; Function Attrs: argmemonly nounwind
133 declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1
135 ; Function Attrs: nounwind readnone
136 declare ptr @llvm.preserve.struct.access.index.p0.net_devices.p0.sk_buffs(ptr, i32 immarg, i32 immarg) #2
138 ; Function Attrs: nounwind readnone
139 declare ptr @llvm.preserve.struct.access.index.p0.p0.net_devices(ptr, i32 immarg, i32 immarg) #2
141 ; Function Attrs: argmemonly nounwind
142 declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1
144 ; Function Attrs: nounwind readnone speculatable
145 declare void @llvm.dbg.value(metadata, metadata, metadata) #3
147 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" }
148 attributes #1 = { argmemonly nounwind }
149 attributes #2 = { nounwind readnone }
150 attributes #3 = { nounwind readnone speculatable }
151 attributes #4 = { nounwind }
154 !llvm.module.flags = !{!11, !12, !13}
157 !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)
158 !1 = !DIFile(filename: "test.c", directory: "/tmp/home/yhs/work/tests/llvm")
161 !4 = !DIGlobalVariableExpression(var: !5, expr: !DIExpression())
162 !5 = distinct !DIGlobalVariable(name: "bpf_probe_read", scope: !0, file: !1, line: 10, type: !6, isLocal: true, isDefinition: true)
163 !6 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !7, size: 64)
164 !7 = !DISubroutineType(types: !8)
165 !8 = !{!9, !10, !9, !10}
166 !9 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
167 !10 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: null, size: 64)
168 !11 = !{i32 2, !"Dwarf Version", i32 4}
169 !12 = !{i32 2, !"Debug Info Version", i32 3}
170 !13 = !{i32 1, !"wchar_size", i32 4}
171 !14 = !{!"clang version 9.0.0 (trunk 360739) (llvm/trunk 360747)"}
172 !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: !27)
173 !16 = !DISubroutineType(types: !17)
175 !18 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !19, size: 64)
176 !19 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "sk_buff", file: !1, line: 5, size: 96, elements: !20)
178 !21 = !DIDerivedType(tag: DW_TAG_member, name: "i", scope: !19, file: !1, line: 6, baseType: !9, size: 32)
179 !22 = !DIDerivedType(tag: DW_TAG_member, name: "dev", scope: !19, file: !1, line: 7, baseType: !23, size: 64, offset: 32)
180 !23 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "net_device", file: !1, line: 1, size: 64, elements: !24)
182 !25 = !DIDerivedType(tag: DW_TAG_member, name: "dev_id", scope: !23, file: !1, line: 2, baseType: !9, size: 32)
183 !26 = !DIDerivedType(tag: DW_TAG_member, name: "others", scope: !23, file: !1, line: 3, baseType: !9, size: 32, offset: 32)
185 !28 = !DILocalVariable(name: "ctx", arg: 1, scope: !15, file: !1, line: 13, type: !18)
186 !29 = !DILocalVariable(name: "dev_id", scope: !15, file: !1, line: 14, type: !9)
187 !30 = !DILocation(line: 0, scope: !15)
188 !31 = !DILocation(line: 14, column: 3, scope: !15)
189 !32 = !DILocation(line: 15, column: 40, scope: !15)
190 !33 = !DILocation(line: 15, column: 3, scope: !15)
191 !34 = !DILocation(line: 16, column: 10, scope: !15)
192 !35 = !{!36, !36, i64 0}
193 !36 = !{!"int", !37, i64 0}
194 !37 = !{!"omnipotent char", !38, i64 0}
195 !38 = !{!"Simple C/C++ TBAA"}
196 !39 = !DILocation(line: 17, column: 1, scope: !15)
197 !40 = !DILocation(line: 16, column: 3, scope: !15)