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1; RUN: opt -O2 %s | llvm-dis > %t12; RUN: llc -filetype=asm -o - %t1 | FileCheck -check-prefixes=CHECK %s3; RUN: llc -mattr=+alu32 -filetype=asm -o - %t1 | FileCheck -check-prefixes=CHECK %s4; Source code:5; struct net_device {6; int dev_id;7; int others;8; };9; struct sk_buff {10; int i;11; struct net_device dev[10];12; };13; #define _(x) (__builtin_preserve_access_index(x))14; static int (*bpf_probe_read)(ptr dst, int size, ptr unsafe_ptr)15; = (ptr) 4;16;17; int bpf_prog(struct sk_buff *ctx) {18; int dev_id;19; bpf_probe_read(&dev_id, sizeof(int), _(&ctx->dev[5].dev_id));20; return dev_id;21; }22; Compilation flag:23; clang -target bpf -O2 -g -S -emit-llvm -Xclang -disable-llvm-passes test.c24 25target triple = "bpf"26 27%struct.sk_buff = type { i32, [10 x %struct.net_device] }28%struct.net_device = type { i32, i32 }29 30; Function Attrs: nounwind31define dso_local i32 @bpf_prog(ptr) local_unnamed_addr !dbg !15 {32 %2 = alloca i32, align 433 call void @llvm.dbg.value(metadata ptr %0, metadata !31, metadata !DIExpression()), !dbg !3334 call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %2), !dbg !3435 %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 !1936 %4 = tail call ptr @llvm.preserve.array.access.index.p0.net_devices.p0.net_devices(ptr elementtype([10 x %struct.net_device]) %3, i32 1, i32 5), !dbg !35, !llvm.preserve.access.index !2337 %5 = tail call ptr @llvm.preserve.struct.access.index.p0.p0.net_devices(ptr elementtype(%struct.net_device) %4, i32 0, i32 0), !dbg !35, !llvm.preserve.access.index !2438 %6 = call i32 inttoptr (i64 4 to ptr)(ptr nonnull %2, i32 4, ptr %5), !dbg !3639 %7 = load i32, ptr %2, align 4, !dbg !37, !tbaa !3840 call void @llvm.dbg.value(metadata i32 %7, metadata !32, metadata !DIExpression()), !dbg !3341 call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %2), !dbg !4242 ret i32 %7, !dbg !4343}44 45; CHECK: .section .BTF,"",@progbits46; CHECK-NEXT: .short 60319 # 0xeb9f47; CHECK-NEXT: .byte 148; CHECK-NEXT: .byte 049; CHECK-NEXT: .long 2450; CHECK-NEXT: .long 051; CHECK-NEXT: .long 17252; CHECK-NEXT: .long 17253; CHECK-NEXT: .long 12854; CHECK-NEXT: .long 0 # BTF_KIND_PTR(id = 1)55; CHECK-NEXT: .long 33554432 # 0x200000056; CHECK-NEXT: .long 257; CHECK-NEXT: .long 1 # BTF_KIND_STRUCT(id = 2)58; CHECK-NEXT: .long 67108866 # 0x400000259; CHECK-NEXT: .long 8460; CHECK-NEXT: .long 961; CHECK-NEXT: .long 362; CHECK-NEXT: .long 0 # 0x063; CHECK-NEXT: .long 1164; CHECK-NEXT: .long 565; CHECK-NEXT: .long 32 # 0x2066; CHECK-NEXT: .long 15 # BTF_KIND_INT(id = 3)67; CHECK-NEXT: .long 16777216 # 0x100000068; CHECK-NEXT: .long 469; CHECK-NEXT: .long 16777248 # 0x100002070; CHECK-NEXT: .long 19 # BTF_KIND_STRUCT(id = 4)71; CHECK-NEXT: .long 67108866 # 0x400000272; CHECK-NEXT: .long 873; CHECK-NEXT: .long 3074; CHECK-NEXT: .long 375; CHECK-NEXT: .long 0 # 0x076; CHECK-NEXT: .long 3777; CHECK-NEXT: .long 378; CHECK-NEXT: .long 32 # 0x2079; CHECK-NEXT: .long 0 # BTF_KIND_ARRAY(id = 5)80; CHECK-NEXT: .long 50331648 # 0x300000081; CHECK-NEXT: .long 082; CHECK-NEXT: .long 483; CHECK-NEXT: .long 684; CHECK-NEXT: .long 1085; CHECK-NEXT: .long 44 # BTF_KIND_INT(id = 6)86; CHECK-NEXT: .long 16777216 # 0x100000087; CHECK-NEXT: .long 488; CHECK-NEXT: .long 32 # 0x2089; CHECK-NEXT: .long 0 # BTF_KIND_FUNC_PROTO(id = 7)90; CHECK-NEXT: .long 218103809 # 0xd00000191; CHECK-NEXT: .long 392; CHECK-NEXT: .long 6493; CHECK-NEXT: .long 194; CHECK-NEXT: .long 68 # BTF_KIND_FUNC(id = 8)95; CHECK-NEXT: .long 201326593 # 0xc00000196; CHECK-NEXT: .long 797; CHECK-NEXT: .byte 0 # string offset=098; CHECK-NEXT: .ascii "sk_buff" # string offset=199; CHECK-NEXT: .byte 0100; CHECK-NEXT: .byte 105 # string offset=9101; CHECK-NEXT: .byte 0102; CHECK-NEXT: .ascii "dev" # string offset=11103; CHECK-NEXT: .byte 0104; CHECK-NEXT: .ascii "int" # string offset=15105; CHECK-NEXT: .byte 0106; CHECK-NEXT: .ascii "net_device" # string offset=19107; CHECK-NEXT: .byte 0108; CHECK-NEXT: .ascii "dev_id" # string offset=30109; CHECK-NEXT: .byte 0110; CHECK-NEXT: .ascii "others" # string offset=37111; CHECK-NEXT: .byte 0112; CHECK-NEXT: .ascii "__ARRAY_SIZE_TYPE__" # string offset=44113; CHECK-NEXT: .byte 0114; CHECK-NEXT: .ascii "ctx" # string offset=64115; CHECK-NEXT: .byte 0116; CHECK-NEXT: .ascii "bpf_prog" # string offset=68117; CHECK-NEXT: .byte 0118; CHECK-NEXT: .ascii ".text" # string offset=77119; CHECK-NEXT: .byte 0120; CHECK-NEXT: .ascii "/tmp/home/yhs/work/tests/llvm/test.c" # string offset=83121; CHECK-NEXT: .byte 0122; CHECK-NEXT: .ascii "0:1:5:0" # string offset=120123; CHECK-NEXT: .byte 0124; CHECK-NEXT: .section .BTF.ext,"",@progbits125; CHECK-NEXT: .short 60319 # 0xeb9f126; CHECK-NEXT: .byte 1127; CHECK-NEXT: .byte 0128; CHECK-NEXT: .long 32129; CHECK-NEXT: .long 0130; CHECK-NEXT: .long 20131; CHECK-NEXT: .long 20132; CHECK-NEXT: .long {{[0-9]+}}133; CHECK-NEXT: .long {{[0-9]+}}134; CHECK-NEXT: .long 28135; CHECK-NEXT: .long 8 # FuncInfo136 137; CHECK: .long 16 # FieldReloc138; CHECK-NEXT: .long 77 # Field reloc section string offset=77139; CHECK-NEXT: .long 1140; CHECK-NEXT: .long .Ltmp{{[0-9]+}}141; CHECK-NEXT: .long 2142; CHECK-NEXT: .long 120143; CHECK-NEXT: .long 0144 145; Function Attrs: argmemonly nounwind146declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture)147 148; Function Attrs: nounwind readnone149declare ptr @llvm.preserve.struct.access.index.p0.net_devices.p0.sk_buffs(ptr, i32 immarg, i32 immarg)150 151; Function Attrs: nounwind readnone152declare ptr @llvm.preserve.array.access.index.p0.net_devices.p0.net_devices(ptr, i32 immarg, i32 immarg)153 154; Function Attrs: nounwind readnone155declare ptr @llvm.preserve.struct.access.index.p0.p0.net_devices(ptr, i32 immarg, i32 immarg)156 157; Function Attrs: argmemonly nounwind158declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture)159 160; Function Attrs: nounwind readnone speculatable161declare void @llvm.dbg.value(metadata, metadata, metadata)162 163!llvm.dbg.cu = !{!0}164!llvm.module.flags = !{!11, !12, !13}165!llvm.ident = !{!14}166 167!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)168!1 = !DIFile(filename: "test.c", directory: "/tmp/home/yhs/work/tests/llvm")169!2 = !{}170!3 = !{!4}171!4 = !DIGlobalVariableExpression(var: !5, expr: !DIExpression())172!5 = distinct !DIGlobalVariable(name: "bpf_probe_read", scope: !0, file: !1, line: 10, type: !6, isLocal: true, isDefinition: true)173!6 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !7, size: 64)174!7 = !DISubroutineType(types: !8)175!8 = !{!9, !10, !9, !10}176!9 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)177!10 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: null, size: 64)178!11 = !{i32 2, !"Dwarf Version", i32 4}179!12 = !{i32 2, !"Debug Info Version", i32 3}180!13 = !{i32 1, !"wchar_size", i32 4}181!14 = !{!"clang version 9.0.0 (trunk 360739) (llvm/trunk 360747)"}182!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: !30)183!16 = !DISubroutineType(types: !17)184!17 = !{!9, !18}185!18 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !19, size: 64)186!19 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "sk_buff", file: !1, line: 5, size: 672, elements: !20)187!20 = !{!21, !22}188!21 = !DIDerivedType(tag: DW_TAG_member, name: "i", scope: !19, file: !1, line: 6, baseType: !9, size: 32)189!22 = !DIDerivedType(tag: DW_TAG_member, name: "dev", scope: !19, file: !1, line: 7, baseType: !23, size: 640, offset: 32)190!23 = !DICompositeType(tag: DW_TAG_array_type, baseType: !24, size: 640, elements: !28)191!24 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "net_device", file: !1, line: 1, size: 64, elements: !25)192!25 = !{!26, !27}193!26 = !DIDerivedType(tag: DW_TAG_member, name: "dev_id", scope: !24, file: !1, line: 2, baseType: !9, size: 32)194!27 = !DIDerivedType(tag: DW_TAG_member, name: "others", scope: !24, file: !1, line: 3, baseType: !9, size: 32, offset: 32)195!28 = !{!29}196!29 = !DISubrange(count: 10)197!30 = !{!31, !32}198!31 = !DILocalVariable(name: "ctx", arg: 1, scope: !15, file: !1, line: 13, type: !18)199!32 = !DILocalVariable(name: "dev_id", scope: !15, file: !1, line: 14, type: !9)200!33 = !DILocation(line: 0, scope: !15)201!34 = !DILocation(line: 14, column: 3, scope: !15)202!35 = !DILocation(line: 15, column: 40, scope: !15)203!36 = !DILocation(line: 15, column: 3, scope: !15)204!37 = !DILocation(line: 16, column: 10, scope: !15)205!38 = !{!39, !39, i64 0}206!39 = !{!"int", !40, i64 0}207!40 = !{!"omnipotent char", !41, i64 0}208!41 = !{!"Simple C/C++ TBAA"}209!42 = !DILocation(line: 17, column: 1, scope: !15)210!43 = !DILocation(line: 16, column: 3, scope: !15)211