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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 v1 {int a; int b;};6; typedef struct v1 __v1;7; typedef __v1 arr[4];8; struct v3 { char c; int d[100]; };9; #define _(x) (__builtin_preserve_access_index(x))10; #define cast_to_arr(x) ((arr *)(x))11; int get_value(const int *arg);12; int test(struct v3 *arg) {13; return get_value(_(&cast_to_arr(&arg->d[0])[0][2].b));14; }15; Compilation flag:16; clang -target bpf -O2 -g -S -emit-llvm -Xclang -disable-llvm-passes test.c17 18target triple = "bpf"19 20%struct.v3 = type { i8, [100 x i32] }21%struct.v1 = type { i32, i32 }22 23; Function Attrs: nounwind24define dso_local i32 @test(ptr %arg) local_unnamed_addr !dbg !22 {25entry:26 call void @llvm.dbg.value(metadata ptr %arg, metadata !32, metadata !DIExpression()), !dbg !3327 %0 = tail call ptr @llvm.preserve.struct.access.index.p0.p0(ptr elementtype(%struct.v3) %arg, i32 1, i32 1), !dbg !34, !llvm.preserve.access.index !2628 %1 = tail call ptr @llvm.preserve.array.access.index.p0.p0(ptr elementtype([100 x i32]) %0, i32 1, i32 0), !dbg !34, !llvm.preserve.access.index !1529 %2 = bitcast ptr %1 to ptr, !dbg !3430 %3 = tail call ptr @llvm.preserve.array.access.index.p0.p0(ptr elementtype([4 x %struct.v1]) %2, i32 0, i32 0), !dbg !34, !llvm.preserve.access.index !431 %4 = tail call ptr @llvm.preserve.array.access.index.p0.p0(ptr elementtype([4 x %struct.v1]) %3, i32 1, i32 2), !dbg !34, !llvm.preserve.access.index !532 %5 = tail call ptr @llvm.preserve.struct.access.index.p0.p0(ptr elementtype(%struct.v1) %4, i32 1, i32 1), !dbg !34, !llvm.preserve.access.index !833 %call = tail call i32 @get_value(ptr %5), !dbg !3534 ret i32 %call, !dbg !3635}36 37; CHECK: r2 = 438; CHECK: r1 += r239; CHECK: r2 = 2040; CHECK: r1 += r241; CHECK: call get_value42 43; CHECK: .long 1 # BTF_KIND_STRUCT(id = [[TID1:[0-9]+]])44; CHECK: .long 100 # BTF_KIND_STRUCT(id = [[TID2:[0-9]+]])45 46; CHECK: .ascii "v3" # string offset=147; CHECK: .ascii ".text" # string offset=4648; CHECK: .ascii "0:1:0" # string offset=5249; CHECK: .ascii "2:1" # string offset=10750 51; CHECK: .long 16 # FieldReloc52; CHECK-NEXT: .long 46 # Field reloc section string offset=4653; CHECK-NEXT: .long 254; CHECK-NEXT: .long .Ltmp{{[0-9]+}}55; CHECK-NEXT: .long [[TID1]]56; CHECK-NEXT: .long 5257; CHECK-NEXT: .long 058; CHECK-NEXT: .long .Ltmp{{[0-9]+}}59; CHECK-NEXT: .long [[TID2]]60; CHECK-NEXT: .long 10761; CHECK-NEXT: .long 062 63declare dso_local i32 @get_value(ptr) local_unnamed_addr64 65; Function Attrs: nounwind readnone66declare ptr @llvm.preserve.struct.access.index.p0.p0(ptr, i32, i32)67 68; Function Attrs: nounwind readnone69declare ptr @llvm.preserve.array.access.index.p0.p0(ptr, i32, i32)70 71; Function Attrs: nounwind readnone72 73; Function Attrs: nounwind readnone74 75; Function Attrs: nounwind readnone76 77; Function Attrs: nounwind readnone speculatable willreturn78declare void @llvm.dbg.value(metadata, metadata, metadata)79 80!llvm.dbg.cu = !{!0}81!llvm.module.flags = !{!18, !19, !20}82!llvm.ident = !{!21}83 84!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 10.0.0 (trunk 367256) (llvm/trunk 367266)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, retainedTypes: !3, nameTableKind: None)85!1 = !DIFile(filename: "test.c", directory: "/tmp/home/yhs/work/tests/llvm/cast")86!2 = !{}87!3 = !{!4, !15, !5}88!4 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !5, size: 64)89!5 = !DIDerivedType(tag: DW_TAG_typedef, name: "arr", file: !1, line: 3, baseType: !6)90!6 = !DICompositeType(tag: DW_TAG_array_type, baseType: !7, size: 256, elements: !13)91!7 = !DIDerivedType(tag: DW_TAG_typedef, name: "__v1", file: !1, line: 2, baseType: !8)92!8 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "v1", file: !1, line: 1, size: 64, elements: !9)93!9 = !{!10, !12}94!10 = !DIDerivedType(tag: DW_TAG_member, name: "a", scope: !8, file: !1, line: 1, baseType: !11, size: 32)95!11 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)96!12 = !DIDerivedType(tag: DW_TAG_member, name: "b", scope: !8, file: !1, line: 1, baseType: !11, size: 32, offset: 32)97!13 = !{!14}98!14 = !DISubrange(count: 4)99!15 = !DICompositeType(tag: DW_TAG_array_type, baseType: !11, size: 3200, elements: !16)100!16 = !{!17}101!17 = !DISubrange(count: 100)102!18 = !{i32 2, !"Dwarf Version", i32 4}103!19 = !{i32 2, !"Debug Info Version", i32 3}104!20 = !{i32 1, !"wchar_size", i32 4}105!21 = !{!"clang version 10.0.0 (trunk 367256) (llvm/trunk 367266)"}106!22 = distinct !DISubprogram(name: "test", scope: !1, file: !1, line: 8, type: !23, scopeLine: 8, flags: DIFlagPrototyped, isDefinition: true, isOptimized: true, unit: !0, retainedNodes: !31)107!23 = !DISubroutineType(types: !24)108!24 = !{!11, !25}109!25 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !26, size: 64)110!26 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "v3", file: !1, line: 4, size: 3232, elements: !27)111!27 = !{!28, !30}112!28 = !DIDerivedType(tag: DW_TAG_member, name: "c", scope: !26, file: !1, line: 4, baseType: !29, size: 8)113!29 = !DIBasicType(name: "char", size: 8, encoding: DW_ATE_signed_char)114!30 = !DIDerivedType(tag: DW_TAG_member, name: "d", scope: !26, file: !1, line: 4, baseType: !15, size: 3200, offset: 32)115!31 = !{!32}116!32 = !DILocalVariable(name: "arg", arg: 1, scope: !22, file: !1, line: 8, type: !25)117!33 = !DILocation(line: 0, scope: !22)118!34 = !DILocation(line: 9, column: 20, scope: !22)119!35 = !DILocation(line: 9, column: 10, scope: !22)120!36 = !DILocation(line: 9, column: 3, scope: !22)121