1; RUN: opt -O2 %s | llvm-dis > %t1 2; RUN: llc -filetype=asm -o - %t1 | FileCheck -check-prefixes=CHECK %s 3; RUN: llc -mattr=+alu32 -filetype=asm -o - %t1 | FileCheck -check-prefixes=CHECK %s 4; 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.c 13 14target triple = "bpf" 15 16%struct.v3 = type { i32, i32 } 17 18; Function Attrs: nounwind 19define dso_local i32 @test(ptr %arg) local_unnamed_addr #0 !dbg !15 { 20entry: 21 call void @llvm.dbg.value(metadata ptr %arg, metadata !19, metadata !DIExpression()), !dbg !20 22 %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 !4 23 %call = tail call i32 @get_value(ptr %0) #4, !dbg !22 24 ret i32 %call, !dbg !23 25} 26 27; CHECK: r2 = 8 28; CHECK: r1 += r2 29; CHECK: call get_value 30 31; CHECK: .long 6 # BTF_KIND_STRUCT(id = [[TID1:[0-9]+]]) 32 33; CHECK: .ascii "v3" # string offset=6 34; CHECK: .ascii ".text" # string offset=26 35; CHECK: .byte 49 # string offset=32 36 37; CHECK: .long 16 # FieldReloc 38; CHECK-NEXT: .long 26 # Field reloc section string offset=26 39; CHECK-NEXT: .long 1 40; CHECK-NEXT: .long .Ltmp{{[0-9]+}} 41; CHECK-NEXT: .long [[TID1]] 42; CHECK-NEXT: .long 32 43; CHECK-NEXT: .long 0 44 45declare dso_local i32 @get_value(ptr) local_unnamed_addr #1 46 47; Function Attrs: nounwind readnone 48declare ptr @llvm.preserve.array.access.index.p0.v3s.p0.v3s(ptr, i32, i32) #2 49 50; Function Attrs: nounwind readnone speculatable willreturn 51declare void @llvm.dbg.value(metadata, metadata, metadata) #3 52 53attributes #0 = { nounwind "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "frame-pointer"="all" "less-precise-fpmad"="false" "min-legal-vector-width"="0" "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" } 54attributes #1 = { "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "frame-pointer"="all" "less-precise-fpmad"="false" "no-infs-fp-math"="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" } 55attributes #2 = { nounwind readnone } 56attributes #3 = { nounwind readnone speculatable willreturn } 57attributes #4 = { nounwind } 58 59!llvm.dbg.cu = !{!0} 60!llvm.module.flags = !{!11, !12, !13} 61!llvm.ident = !{!14} 62 63!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) 64!1 = !DIFile(filename: "test.c", directory: "/tmp/home/yhs/work/tests/llvm/cast") 65!2 = !{} 66!3 = !{!4} 67!4 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !5, size: 64) 68!5 = !DIDerivedType(tag: DW_TAG_typedef, name: "__v3", file: !1, line: 1, baseType: !6) 69!6 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "v3", file: !1, line: 1, size: 64, elements: !7) 70!7 = !{!8, !10} 71!8 = !DIDerivedType(tag: DW_TAG_member, name: "a", scope: !6, file: !1, line: 1, baseType: !9, size: 32) 72!9 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed) 73!10 = !DIDerivedType(tag: DW_TAG_member, name: "b", scope: !6, file: !1, line: 1, baseType: !9, size: 32, offset: 32) 74!11 = !{i32 2, !"Dwarf Version", i32 4} 75!12 = !{i32 2, !"Debug Info Version", i32 3} 76!13 = !{i32 1, !"wchar_size", i32 4} 77!14 = !{!"clang version 10.0.0 (trunk 367256) (llvm/trunk 367266)"} 78!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) 79!16 = !DISubroutineType(types: !17) 80!17 = !{!9, !4} 81!18 = !{!19} 82!19 = !DILocalVariable(name: "arg", arg: 1, scope: !15, file: !1, line: 4, type: !4) 83!20 = !DILocation(line: 0, scope: !15) 84!21 = !DILocation(line: 5, column: 20, scope: !15) 85!22 = !DILocation(line: 5, column: 10, scope: !15) 86!23 = !DILocation(line: 5, column: 3, scope: !15) 87