| ; RUN: llc -march=bpfel -filetype=asm -o - %s | FileCheck -check-prefixes=CHECK %s |
| ; RUN: llc -march=bpfeb -filetype=asm -o - %s | FileCheck -check-prefixes=CHECK %s |
| ; Source code: |
| ; union sk_buff { |
| ; int i; |
| ; struct { |
| ; int netid; |
| ; union { |
| ; int dev_id; |
| ; int others; |
| ; } dev; |
| ; } u; |
| ; }; |
| ; #define _(x) (__builtin_preserve_access_index(x)) |
| ; static int (*bpf_probe_read)(void *dst, int size, void *unsafe_ptr) |
| ; = (void *) 4; |
| ; |
| ; int bpf_prog(union sk_buff *ctx) { |
| ; int dev_id; |
| ; bpf_probe_read(&dev_id, sizeof(int), _(&ctx->u.dev.dev_id)); |
| ; return dev_id; |
| ; } |
| ; Compilation flag: |
| ; clang -target bpf -O2 -g -S -emit-llvm test.c |
| |
| %union.sk_buff = type { %struct.anon } |
| %struct.anon = type { i32, %union.anon } |
| %union.anon = type { i32 } |
| |
| ; Function Attrs: nounwind |
| define dso_local i32 @bpf_prog(%union.sk_buff*) local_unnamed_addr #0 !dbg !15 { |
| %2 = alloca i32, align 4 |
| call void @llvm.dbg.value(metadata %union.sk_buff* %0, metadata !32, metadata !DIExpression()), !dbg !34 |
| %3 = bitcast i32* %2 to i8*, !dbg !35 |
| call void @llvm.lifetime.start.p0i8(i64 4, i8* nonnull %3) #4, !dbg !35 |
| %4 = tail call %union.sk_buff* @llvm.preserve.union.access.index.p0s_union.sk_buffs.p0s_union.sk_buffs(%union.sk_buff* %0, i32 1), !dbg !36, !llvm.preserve.access.index !19 |
| %5 = getelementptr inbounds %union.sk_buff, %union.sk_buff* %4, i64 0, i32 0, !dbg !36 |
| %6 = tail call %union.anon* @llvm.preserve.struct.access.index.p0s_union.anons.p0s_struct.anons(%struct.anon* %5, i32 1, i32 1), !dbg !36, !llvm.preserve.access.index !23 |
| %7 = tail call %union.anon* @llvm.preserve.union.access.index.p0s_union.anons.p0s_union.anons(%union.anon* %6, i32 0), !dbg !36, !llvm.preserve.access.index !27 |
| %8 = bitcast %union.anon* %7 to i8*, !dbg !36 |
| %9 = call i32 inttoptr (i64 4 to i32 (i8*, i32, i8*)*)(i8* nonnull %3, i32 4, i8* %8) #4, !dbg !37 |
| %10 = load i32, i32* %2, align 4, !dbg !38, !tbaa !39 |
| call void @llvm.dbg.value(metadata i32 %10, metadata !33, metadata !DIExpression()), !dbg !34 |
| call void @llvm.lifetime.end.p0i8(i64 4, i8* nonnull %3) #4, !dbg !43 |
| ret i32 %10, !dbg !44 |
| } |
| |
| ; CHECK: .section .BTF,"",@progbits |
| ; CHECK-NEXT: .short 60319 # 0xeb9f |
| ; CHECK-NEXT: .byte 1 |
| ; CHECK-NEXT: .byte 0 |
| ; CHECK-NEXT: .long 24 |
| ; CHECK-NEXT: .long 0 |
| ; CHECK-NEXT: .long 168 |
| ; CHECK-NEXT: .long 168 |
| ; CHECK-NEXT: .long 105 |
| ; CHECK-NEXT: .long 0 # BTF_KIND_PTR(id = 1) |
| ; CHECK-NEXT: .long 33554432 # 0x2000000 |
| ; CHECK-NEXT: .long 2 |
| ; CHECK-NEXT: .long 1 # BTF_KIND_UNION(id = 2) |
| ; CHECK-NEXT: .long 83886082 # 0x5000002 |
| ; CHECK-NEXT: .long 8 |
| ; CHECK-NEXT: .long 9 |
| ; CHECK-NEXT: .long 3 |
| ; CHECK-NEXT: .long 0 # 0x0 |
| ; CHECK-NEXT: .long 11 |
| ; CHECK-NEXT: .long 4 |
| ; CHECK-NEXT: .long 0 # 0x0 |
| ; CHECK-NEXT: .long 13 # BTF_KIND_INT(id = 3) |
| ; CHECK-NEXT: .long 16777216 # 0x1000000 |
| ; CHECK-NEXT: .long 4 |
| ; CHECK-NEXT: .long 16777248 # 0x1000020 |
| ; CHECK-NEXT: .long 0 # BTF_KIND_STRUCT(id = 4) |
| ; CHECK-NEXT: .long 67108866 # 0x4000002 |
| ; CHECK-NEXT: .long 8 |
| ; CHECK-NEXT: .long 17 |
| ; CHECK-NEXT: .long 3 |
| ; CHECK-NEXT: .long 0 # 0x0 |
| ; CHECK-NEXT: .long 23 |
| ; CHECK-NEXT: .long 5 |
| ; CHECK-NEXT: .long 32 # 0x20 |
| ; CHECK-NEXT: .long 0 # BTF_KIND_UNION(id = 5) |
| ; CHECK-NEXT: .long 83886082 # 0x5000002 |
| ; CHECK-NEXT: .long 4 |
| ; CHECK-NEXT: .long 27 |
| ; CHECK-NEXT: .long 3 |
| ; CHECK-NEXT: .long 0 # 0x0 |
| ; CHECK-NEXT: .long 34 |
| ; CHECK-NEXT: .long 3 |
| ; CHECK-NEXT: .long 0 # 0x0 |
| ; CHECK-NEXT: .long 0 # BTF_KIND_FUNC_PROTO(id = 6) |
| ; CHECK-NEXT: .long 218103809 # 0xd000001 |
| ; CHECK-NEXT: .long 3 |
| ; CHECK-NEXT: .long 41 |
| ; CHECK-NEXT: .long 1 |
| ; CHECK-NEXT: .long 45 # BTF_KIND_FUNC(id = 7) |
| ; CHECK-NEXT: .long 201326592 # 0xc000000 |
| ; CHECK-NEXT: .long 6 |
| ; CHECK-NEXT: .byte 0 # string offset=0 |
| ; CHECK-NEXT: .ascii "sk_buff" # string offset=1 |
| ; CHECK-NEXT: .byte 0 |
| ; CHECK-NEXT: .byte 105 # string offset=9 |
| ; CHECK-NEXT: .byte 0 |
| ; CHECK-NEXT: .byte 117 # string offset=11 |
| ; CHECK-NEXT: .byte 0 |
| ; CHECK-NEXT: .ascii "int" # string offset=13 |
| ; CHECK-NEXT: .byte 0 |
| ; CHECK-NEXT: .ascii "netid" # string offset=17 |
| ; CHECK-NEXT: .byte 0 |
| ; CHECK-NEXT: .ascii "dev" # string offset=23 |
| ; CHECK-NEXT: .byte 0 |
| ; CHECK-NEXT: .ascii "dev_id" # string offset=27 |
| ; CHECK-NEXT: .byte 0 |
| ; CHECK-NEXT: .ascii "others" # string offset=34 |
| ; CHECK-NEXT: .byte 0 |
| ; CHECK-NEXT: .ascii "ctx" # string offset=41 |
| ; CHECK-NEXT: .byte 0 |
| ; CHECK-NEXT: .ascii "bpf_prog" # string offset=45 |
| ; CHECK-NEXT: .byte 0 |
| ; CHECK-NEXT: .ascii ".text" # string offset=54 |
| ; CHECK-NEXT: .byte 0 |
| ; CHECK-NEXT: .ascii "/tmp/home/yhs/work/tests/llvm/test.c" # string offset=60 |
| ; CHECK-NEXT: .byte 0 |
| ; CHECK-NEXT: .ascii "0:1:1:0" # string offset=97 |
| ; CHECK-NEXT: .byte 0 |
| ; CHECK-NEXT: .section .BTF.ext,"",@progbits |
| ; CHECK-NEXT: .short 60319 # 0xeb9f |
| ; CHECK-NEXT: .byte 1 |
| ; CHECK-NEXT: .byte 0 |
| ; CHECK-NEXT: .long 32 |
| ; CHECK-NEXT: .long 0 |
| ; CHECK-NEXT: .long 20 |
| ; CHECK-NEXT: .long 20 |
| ; CHECK-NEXT: .long 76 |
| ; CHECK-NEXT: .long 96 |
| ; CHECK-NEXT: .long 28 |
| ; CHECK-NEXT: .long 8 # FuncInfo |
| |
| ; CHECK: .long 16 # FieldReloc |
| ; CHECK-NEXT: .long 54 # Field reloc section string offset=54 |
| ; CHECK-NEXT: .long 1 |
| ; CHECK-NEXT: .long .Ltmp{{[0-9]+}} |
| ; CHECK-NEXT: .long 2 |
| ; CHECK-NEXT: .long 97 |
| ; CHECK-NEXT: .long 0 |
| |
| ; Function Attrs: argmemonly nounwind |
| declare void @llvm.lifetime.start.p0i8(i64 immarg, i8* nocapture) #1 |
| |
| ; Function Attrs: nounwind readnone |
| declare %union.sk_buff* @llvm.preserve.union.access.index.p0s_union.sk_buffs.p0s_union.sk_buffs(%union.sk_buff*, i32 immarg) #2 |
| |
| ; Function Attrs: nounwind readnone |
| declare %union.anon* @llvm.preserve.struct.access.index.p0s_union.anons.p0s_struct.anons(%struct.anon*, i32 immarg, i32 immarg) #2 |
| |
| ; Function Attrs: nounwind readnone |
| declare %union.anon* @llvm.preserve.union.access.index.p0s_union.anons.p0s_union.anons(%union.anon*, i32 immarg) #2 |
| |
| ; Function Attrs: argmemonly nounwind |
| declare void @llvm.lifetime.end.p0i8(i64 immarg, i8* nocapture) #1 |
| |
| ; Function Attrs: nounwind readnone speculatable |
| declare void @llvm.dbg.value(metadata, metadata, metadata) #3 |
| |
| 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" } |
| attributes #1 = { argmemonly nounwind } |
| attributes #2 = { nounwind readnone } |
| attributes #3 = { nounwind readnone speculatable } |
| attributes #4 = { nounwind } |
| |
| !llvm.dbg.cu = !{!0} |
| !llvm.module.flags = !{!11, !12, !13} |
| !llvm.ident = !{!14} |
| |
| !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) |
| !1 = !DIFile(filename: "test.c", directory: "/tmp/home/yhs/work/tests/llvm") |
| !2 = !{} |
| !3 = !{!4} |
| !4 = !DIGlobalVariableExpression(var: !5, expr: !DIExpression()) |
| !5 = distinct !DIGlobalVariable(name: "bpf_probe_read", scope: !0, file: !1, line: 12, type: !6, isLocal: true, isDefinition: true) |
| !6 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !7, size: 64) |
| !7 = !DISubroutineType(types: !8) |
| !8 = !{!9, !10, !9, !10} |
| !9 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed) |
| !10 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: null, size: 64) |
| !11 = !{i32 2, !"Dwarf Version", i32 4} |
| !12 = !{i32 2, !"Debug Info Version", i32 3} |
| !13 = !{i32 1, !"wchar_size", i32 4} |
| !14 = !{!"clang version 9.0.0 (trunk 360739) (llvm/trunk 360747)"} |
| !15 = distinct !DISubprogram(name: "bpf_prog", scope: !1, file: !1, line: 15, type: !16, scopeLine: 15, flags: DIFlagPrototyped, isLocal: false, isDefinition: true, isOptimized: true, unit: !0, retainedNodes: !31) |
| !16 = !DISubroutineType(types: !17) |
| !17 = !{!9, !18} |
| !18 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !19, size: 64) |
| !19 = distinct !DICompositeType(tag: DW_TAG_union_type, name: "sk_buff", file: !1, line: 1, size: 64, elements: !20) |
| !20 = !{!21, !22} |
| !21 = !DIDerivedType(tag: DW_TAG_member, name: "i", scope: !19, file: !1, line: 2, baseType: !9, size: 32) |
| !22 = !DIDerivedType(tag: DW_TAG_member, name: "u", scope: !19, file: !1, line: 9, baseType: !23, size: 64) |
| !23 = distinct !DICompositeType(tag: DW_TAG_structure_type, scope: !19, file: !1, line: 3, size: 64, elements: !24) |
| !24 = !{!25, !26} |
| !25 = !DIDerivedType(tag: DW_TAG_member, name: "netid", scope: !23, file: !1, line: 4, baseType: !9, size: 32) |
| !26 = !DIDerivedType(tag: DW_TAG_member, name: "dev", scope: !23, file: !1, line: 8, baseType: !27, size: 32, offset: 32) |
| !27 = distinct !DICompositeType(tag: DW_TAG_union_type, scope: !23, file: !1, line: 5, size: 32, elements: !28) |
| !28 = !{!29, !30} |
| !29 = !DIDerivedType(tag: DW_TAG_member, name: "dev_id", scope: !27, file: !1, line: 6, baseType: !9, size: 32) |
| !30 = !DIDerivedType(tag: DW_TAG_member, name: "others", scope: !27, file: !1, line: 7, baseType: !9, size: 32) |
| !31 = !{!32, !33} |
| !32 = !DILocalVariable(name: "ctx", arg: 1, scope: !15, file: !1, line: 15, type: !18) |
| !33 = !DILocalVariable(name: "dev_id", scope: !15, file: !1, line: 16, type: !9) |
| !34 = !DILocation(line: 0, scope: !15) |
| !35 = !DILocation(line: 16, column: 3, scope: !15) |
| !36 = !DILocation(line: 17, column: 40, scope: !15) |
| !37 = !DILocation(line: 17, column: 3, scope: !15) |
| !38 = !DILocation(line: 18, column: 10, scope: !15) |
| !39 = !{!40, !40, i64 0} |
| !40 = !{!"int", !41, i64 0} |
| !41 = !{!"omnipotent char", !42, i64 0} |
| !42 = !{!"Simple C/C++ TBAA"} |
| !43 = !DILocation(line: 19, column: 1, scope: !15) |
| !44 = !DILocation(line: 18, column: 3, scope: !15) |
