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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; typedef struct v3 { int a; int b; } __v3;6; #define _(x) (__builtin_preserve_access_index(x))7; int get_value(const int *arg);8; int test(__v3 *arg) {9; return get_value(_(&arg[1]));10; }11; Compilation flag:12; clang -target bpf -O2 -g -S -emit-llvm -Xclang -disable-llvm-passes test.c13 14target triple = "bpf"15 16%struct.v3 = type { i32, i32 }17 18; Function Attrs: nounwind19define dso_local i32 @test(ptr %arg) local_unnamed_addr !dbg !15 {20entry:21 call void @llvm.dbg.value(metadata ptr %arg, metadata !19, metadata !DIExpression()), !dbg !2022 %0 = tail call ptr @llvm.preserve.array.access.index.p0.v3s.p0.v3s(ptr elementtype(%struct.v3) %arg, i32 0, i32 1), !dbg !21, !llvm.preserve.access.index !423 %call = tail call i32 @get_value(ptr %0), !dbg !2224 ret i32 %call, !dbg !2325}26 27; CHECK: r2 = 828; CHECK: r1 += r229; CHECK: call get_value30 31; CHECK: .long 6 # BTF_KIND_STRUCT(id = [[TID1:[0-9]+]])32 33; CHECK: .ascii "v3" # string offset=634; CHECK: .ascii ".text" # string offset=2635; CHECK: .byte 49 # string offset=3236 37; CHECK: .long 16 # FieldReloc38; CHECK-NEXT: .long 26 # Field reloc section string offset=2639; CHECK-NEXT: .long 140; CHECK-NEXT: .long .Ltmp{{[0-9]+}}41; CHECK-NEXT: .long [[TID1]]42; CHECK-NEXT: .long 3243; CHECK-NEXT: .long 044 45declare dso_local i32 @get_value(ptr) local_unnamed_addr46 47; Function Attrs: nounwind readnone48declare ptr @llvm.preserve.array.access.index.p0.v3s.p0.v3s(ptr, i32, i32)49 50; Function Attrs: nounwind readnone speculatable willreturn51declare void @llvm.dbg.value(metadata, metadata, metadata)52 53!llvm.dbg.cu = !{!0}54!llvm.module.flags = !{!11, !12, !13}55!llvm.ident = !{!14}56 57!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)58!1 = !DIFile(filename: "test.c", directory: "/tmp/home/yhs/work/tests/llvm/cast")59!2 = !{}60!3 = !{!4}61!4 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !5, size: 64)62!5 = !DIDerivedType(tag: DW_TAG_typedef, name: "__v3", file: !1, line: 1, baseType: !6)63!6 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "v3", file: !1, line: 1, size: 64, elements: !7)64!7 = !{!8, !10}65!8 = !DIDerivedType(tag: DW_TAG_member, name: "a", scope: !6, file: !1, line: 1, baseType: !9, size: 32)66!9 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)67!10 = !DIDerivedType(tag: DW_TAG_member, name: "b", scope: !6, file: !1, line: 1, baseType: !9, size: 32, offset: 32)68!11 = !{i32 2, !"Dwarf Version", i32 4}69!12 = !{i32 2, !"Debug Info Version", i32 3}70!13 = !{i32 1, !"wchar_size", i32 4}71!14 = !{!"clang version 10.0.0 (trunk 367256) (llvm/trunk 367266)"}72!15 = distinct !DISubprogram(name: "test", scope: !1, file: !1, line: 4, type: !16, scopeLine: 4, flags: DIFlagPrototyped, isDefinition: true, isOptimized: true, unit: !0, retainedNodes: !18)73!16 = !DISubroutineType(types: !17)74!17 = !{!9, !4}75!18 = !{!19}76!19 = !DILocalVariable(name: "arg", arg: 1, scope: !15, file: !1, line: 4, type: !4)77!20 = !DILocation(line: 0, scope: !15)78!21 = !DILocation(line: 5, column: 20, scope: !15)79!22 = !DILocation(line: 5, column: 10, scope: !15)80!23 = !DILocation(line: 5, column: 3, scope: !15)81