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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; __v3 *g __attribute__((section("stats")));9; int test() {10; return get_value(_(&g->b));11; }12; Compilation flag:13; clang -target bpf -O2 -g -S -emit-llvm -Xclang -disable-llvm-passes test.c14 15target triple = "bpf"16 17%struct.v3 = type { i32, i32 }18 19@g = dso_local local_unnamed_addr global ptr null, section "stats", align 8, !dbg !020 21; Function Attrs: nounwind22define dso_local i32 @test() local_unnamed_addr !dbg !17 {23entry:24 %0 = load ptr, ptr @g, align 8, !dbg !20, !tbaa !2125 %1 = tail call ptr @llvm.preserve.struct.access.index.p0.p0.v3s(ptr elementtype(%struct.v3) %0, i32 1, i32 1), !dbg !20, !llvm.preserve.access.index !826 %call = tail call i32 @get_value(ptr %1), !dbg !2527 ret i32 %call, !dbg !2628}29 30; CHECK: r2 = 431; CHECK: r1 += r232; CHECK: call get_value33 34; CHECK: .long 16 # BTF_KIND_STRUCT(id = [[TID1:[0-9]+]])35 36; CHECK: .ascii ".text" # string offset=1037; CHECK: .ascii "v3" # string offset=1638; CHECK: .ascii "0:1" # string offset=2339 40; CHECK: .long 16 # FieldReloc41; CHECK-NEXT: .long 10 # Field reloc section string offset=1042; CHECK-NEXT: .long 143; CHECK-NEXT: .long .Ltmp{{[0-9]+}}44; CHECK-NEXT: .long [[TID1]]45; CHECK-NEXT: .long 2346; CHECK-NEXT: .long 047 48declare dso_local i32 @get_value(ptr) local_unnamed_addr49 50; Function Attrs: nounwind readnone51declare ptr @llvm.preserve.struct.access.index.p0.p0.v3s(ptr, i32, i32)52 53!llvm.dbg.cu = !{!2}54!llvm.module.flags = !{!13, !14, !15}55!llvm.ident = !{!16}56 57!0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression())58!1 = distinct !DIGlobalVariable(name: "g", scope: !2, file: !3, line: 4, type: !6, isLocal: false, isDefinition: true)59!2 = distinct !DICompileUnit(language: DW_LANG_C99, file: !3, producer: "clang version 10.0.0 (trunk 367256) (llvm/trunk 367266)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !4, globals: !5, nameTableKind: None)60!3 = !DIFile(filename: "test.c", directory: "/tmp/home/yhs/work/tests/llvm/cast")61!4 = !{}62!5 = !{!0}63!6 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !7, size: 64)64!7 = !DIDerivedType(tag: DW_TAG_typedef, name: "__v3", file: !3, line: 1, baseType: !8)65!8 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "v3", file: !3, line: 1, size: 64, elements: !9)66!9 = !{!10, !12}67!10 = !DIDerivedType(tag: DW_TAG_member, name: "a", scope: !8, file: !3, line: 1, baseType: !11, size: 32)68!11 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)69!12 = !DIDerivedType(tag: DW_TAG_member, name: "b", scope: !8, file: !3, line: 1, baseType: !11, size: 32, offset: 32)70!13 = !{i32 2, !"Dwarf Version", i32 4}71!14 = !{i32 2, !"Debug Info Version", i32 3}72!15 = !{i32 1, !"wchar_size", i32 4}73!16 = !{!"clang version 10.0.0 (trunk 367256) (llvm/trunk 367266)"}74!17 = distinct !DISubprogram(name: "test", scope: !3, file: !3, line: 5, type: !18, scopeLine: 5, isDefinition: true, isOptimized: true, unit: !2, retainedNodes: !4)75!18 = !DISubroutineType(types: !19)76!19 = !{!11}77!20 = !DILocation(line: 6, column: 20, scope: !17)78!21 = !{!22, !22, i64 0}79!22 = !{!"any pointer", !23, i64 0}80!23 = !{!"omnipotent char", !24, i64 0}81!24 = !{!"Simple C/C++ TBAA"}82!25 = !DILocation(line: 6, column: 10, scope: !17)83!26 = !DILocation(line: 6, column: 3, scope: !17)84