| blob | 024ed04f6e5e1707a88f36e05f865805746ef876 |
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 net_device *dev;
8 ; };
9 ; #define _(x) (__builtin_preserve_access_index(x))
10 ; static int (*bpf_probe_read)(ptr dst, int size, ptr unsafe_ptr)
11 ; = (ptr) 4;
12 ;
13 ; int bpf_prog(struct sk_buff *ctx) {
14 ; struct net_device *dev = 0;
15 ; bpf_probe_read(&dev, sizeof(dev), _(&ctx->dev));
16 ; return dev != 0;
17 ; }
18 ; Compilation flag:
19 ; clang -target bpf -O2 -g -S -emit-llvm -Xclang -disable-llvm-passes test.c
21 target triple = "bpf"
23 %struct.sk_buff = type { i32, ptr }
24 %struct.net_device = type opaque
26 ; Function Attrs: nounwind
27 define dso_local i32 @bpf_prog(ptr) local_unnamed_addr #0 !dbg !15 {
28 %2 = alloca ptr, align 8
29 call void @llvm.dbg.value(metadata ptr %0, metadata !26, metadata !DIExpression()), !dbg !28
30 call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %2) #4, !dbg !29
31 call void @llvm.dbg.value(metadata ptr null, metadata !27, metadata !DIExpression()), !dbg !28
32 store ptr null, ptr %2, align 8, !dbg !30, !tbaa !31
33 %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 !35, !llvm.preserve.access.index !19
34 %4 = call i32 inttoptr (i64 4 to ptr)(ptr nonnull %2, i32 8, ptr %3) #4, !dbg !36
35 %5 = load ptr, ptr %2, align 8, !dbg !37, !tbaa !31
36 call void @llvm.dbg.value(metadata ptr %5, metadata !27, metadata !DIExpression()), !dbg !28
37 %6 = icmp ne ptr %5, null, !dbg !38
38 %7 = zext i1 %6 to i32, !dbg !38
39 call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %2) #4, !dbg !39
40 ret i32 %7, !dbg !40
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 120
50 ; CHECK-NEXT: .long 120
51 ; CHECK-NEXT: .long 90
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 16
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 4
63 ; CHECK-NEXT: .long 64 # 0x40
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_PTR(id = 4)
69 ; CHECK-NEXT: .long 33554432 # 0x2000000
70 ; CHECK-NEXT: .long 5
71 ; CHECK-NEXT: .long 19 # BTF_KIND_FWD(id = 5)
72 ; CHECK-NEXT: .long 117440512 # 0x7000000
73 ; CHECK-NEXT: .long 0
74 ; CHECK-NEXT: .long 0 # BTF_KIND_FUNC_PROTO(id = 6)
75 ; CHECK-NEXT: .long 218103809 # 0xd000001
76 ; CHECK-NEXT: .long 3
77 ; CHECK-NEXT: .long 30
78 ; CHECK-NEXT: .long 1
79 ; CHECK-NEXT: .long 34 # BTF_KIND_FUNC(id = 7)
80 ; CHECK-NEXT: .long 201326593 # 0xc000001
81 ; CHECK-NEXT: .long 6
82 ; CHECK-NEXT: .byte 0 # string offset=0
83 ; CHECK-NEXT: .ascii "sk_buff" # string offset=1
84 ; CHECK-NEXT: .byte 0
85 ; CHECK-NEXT: .byte 105 # string offset=9
86 ; CHECK-NEXT: .byte 0
87 ; CHECK-NEXT: .ascii "dev" # string offset=11
88 ; CHECK-NEXT: .byte 0
89 ; CHECK-NEXT: .ascii "int" # string offset=15
90 ; CHECK-NEXT: .byte 0
91 ; CHECK-NEXT: .ascii "net_device" # string offset=19
92 ; CHECK-NEXT: .byte 0
93 ; CHECK-NEXT: .ascii "ctx" # string offset=30
94 ; CHECK-NEXT: .byte 0
95 ; CHECK-NEXT: .ascii "bpf_prog" # string offset=34
96 ; CHECK-NEXT: .byte 0
97 ; CHECK-NEXT: .ascii ".text" # string offset=43
98 ; CHECK-NEXT: .byte 0
99 ; CHECK-NEXT: .ascii "/tmp/home/yhs/work/tests/llvm/test.c" # string offset=49
100 ; CHECK-NEXT: .byte 0
101 ; CHECK-NEXT: .ascii "0:1" # string offset=86
102 ; CHECK-NEXT: .byte 0
103 ; CHECK-NEXT: .section .BTF.ext,"",@progbits
104 ; CHECK-NEXT: .short 60319 # 0xeb9f
105 ; CHECK-NEXT: .byte 1
106 ; CHECK-NEXT: .byte 0
107 ; CHECK-NEXT: .long 32
108 ; CHECK-NEXT: .long 0
109 ; CHECK-NEXT: .long 20
110 ; CHECK-NEXT: .long 20
111 ; CHECK-NEXT: .long 108
112 ; CHECK-NEXT: .long 128
113 ; CHECK-NEXT: .long 28
114 ; CHECK-NEXT: .long 8 # FuncInfo
116 ; CHECK: .long 16 # FieldReloc
117 ; CHECK-NEXT: .long 43 # Field reloc section string offset=43
118 ; CHECK-NEXT: .long 1
119 ; CHECK-NEXT: .long .Ltmp{{[0-9]+}}
120 ; CHECK-NEXT: .long 2
121 ; CHECK-NEXT: .long 86
122 ; CHECK-NEXT: .long 0
124 ; Function Attrs: argmemonly nounwind
125 declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1
127 ; Function Attrs: nounwind readnone
128 declare ptr @llvm.preserve.struct.access.index.p0.net_devices.p0.sk_buffs(ptr, i32 immarg, i32 immarg) #2
130 ; Function Attrs: argmemonly nounwind
131 declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1
133 ; Function Attrs: nounwind readnone speculatable
134 declare void @llvm.dbg.value(metadata, metadata, metadata) #3
136 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" }
137 attributes #1 = { argmemonly nounwind }
138 attributes #2 = { nounwind readnone }
139 attributes #3 = { nounwind readnone speculatable }
140 attributes #4 = { nounwind }
142 !llvm.dbg.cu = !{!0}
143 !llvm.module.flags = !{!11, !12, !13}
144 !llvm.ident = !{!14}
146 !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)
147 !1 = !DIFile(filename: "test.c", directory: "/tmp/home/yhs/work/tests/llvm")
148 !2 = !{}
149 !3 = !{!4}
150 !4 = !DIGlobalVariableExpression(var: !5, expr: !DIExpression())
151 !5 = distinct !DIGlobalVariable(name: "bpf_probe_read", scope: !0, file: !1, line: 6, type: !6, isLocal: true, isDefinition: true)
152 !6 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !7, size: 64)
153 !7 = !DISubroutineType(types: !8)
154 !8 = !{!9, !10, !9, !10}
155 !9 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
156 !10 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: null, size: 64)
157 !11 = !{i32 2, !"Dwarf Version", i32 4}
158 !12 = !{i32 2, !"Debug Info Version", i32 3}
159 !13 = !{i32 1, !"wchar_size", i32 4}
160 !14 = !{!"clang version 9.0.0 (trunk 360739) (llvm/trunk 360747)"}
161 !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)
162 !16 = !DISubroutineType(types: !17)
163 !17 = !{!9, !18}
164 !18 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !19, size: 64)
165 !19 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "sk_buff", file: !1, line: 1, size: 128, elements: !20)
166 !20 = !{!21, !22}
167 !21 = !DIDerivedType(tag: DW_TAG_member, name: "i", scope: !19, file: !1, line: 2, baseType: !9, size: 32)
168 !22 = !DIDerivedType(tag: DW_TAG_member, name: "dev", scope: !19, file: !1, line: 3, baseType: !23, size: 64, offset: 64)
169 !23 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !24, size: 64)
170 !24 = !DICompositeType(tag: DW_TAG_structure_type, name: "net_device", file: !1, line: 3, flags: DIFlagFwdDecl)
171 !25 = !{!26, !27}
172 !26 = !DILocalVariable(name: "ctx", arg: 1, scope: !15, file: !1, line: 9, type: !18)
173 !27 = !DILocalVariable(name: "dev", scope: !15, file: !1, line: 10, type: !23)
174 !28 = !DILocation(line: 0, scope: !15)
175 !29 = !DILocation(line: 10, column: 3, scope: !15)
176 !30 = !DILocation(line: 10, column: 22, scope: !15)
177 !31 = !{!32, !32, i64 0}
178 !32 = !{!"any pointer", !33, i64 0}
179 !33 = !{!"omnipotent char", !34, i64 0}
180 !34 = !{!"Simple C/C++ TBAA"}
181 !35 = !DILocation(line: 11, column: 37, scope: !15)
182 !36 = !DILocation(line: 11, column: 3, scope: !15)
183 !37 = !DILocation(line: 12, column: 10, scope: !15)
184 !38 = !DILocation(line: 12, column: 14, scope: !15)
185 !39 = !DILocation(line: 13, column: 1, scope: !15)
186 !40 = !DILocation(line: 12, column: 3, scope: !15)