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1; RUN: opt -passes=bpf-preserve-static-offset -mtriple=bpf-pc-linux -S -o - %s | FileCheck %s2;3; Source:4; #define __ctx __attribute__((preserve_static_offset))5; #define __pai __attribute__((preserve_access_index))6; 7; struct foo {8; char a[10];9; } __pai;10; 11; struct bar {12; int a;13; int b;14; } __pai;15; 16; struct buz {17; int _1;18; int _2;19; int _3;20; union {21; struct foo a;22; struct bar b[7];23; };24; } __pai __ctx;25; 26; void quux(struct buz *p) {27; p->b[5].b = 42;28; }29; 30; Compilation flag:31; clang -cc1 -O2 -triple bpf -S -emit-llvm -disable-llvm-passes \32; -debug-info-kind=limited -o - \33; | opt -passes=function(sroa) -S -o -34 35%struct.buz = type { i32, i32, i32, %union.anon }36%union.anon = type { [7 x %struct.bar] }37%struct.bar = type { i32, i32 }38 39; Function Attrs: nounwind40define dso_local void @quux(ptr noundef %p) #0 !dbg !31 {41entry:42 call void @llvm.dbg.value(metadata ptr %p, metadata !36, metadata !DIExpression()), !dbg !3743 %0 = call ptr @llvm.preserve.static.offset(ptr %p), !dbg !3844 %1 = call ptr @llvm.preserve.struct.access.index.p0.p0(ptr elementtype(%struct.buz) %0, i32 3, i32 3), !dbg !38, !llvm.preserve.access.index !445 %2 = call ptr @llvm.preserve.union.access.index.p0.p0(ptr %1, i32 1), !dbg !38, !llvm.preserve.access.index !346 %3 = call ptr @llvm.preserve.array.access.index.p0.p0(ptr elementtype([7 x %struct.bar]) %2, i32 1, i32 5), !dbg !39, !llvm.preserve.access.index !2147 %4 = call ptr @llvm.preserve.struct.access.index.p0.p0(ptr elementtype(%struct.bar) %3, i32 1, i32 1), !dbg !40, !llvm.preserve.access.index !2248 store i32 42, ptr %4, align 4, !dbg !41, !tbaa !4249 ret void, !dbg !4550}51 52; CHECK: define dso_local void @quux(ptr noundef %[[p:.*]]) {{.*}} {53; CHECK-NEXT: entry:54; CHECK-NEXT: #dbg_value55; CHECK-NEXT: call void (i32, ptr, i1, i8, i8, i8, i1, ...)56; CHECK-SAME: @llvm.bpf.getelementptr.and.store.i3257; CHECK-SAME: (i32 42,58; CHECK-SAME: ptr writeonly elementtype(i8) %[[p]],59; CHECK-SAME: i1 false, i8 0, i8 1, i8 2, i1 true, i64 immarg 56)60; CHECK-SAME: #[[v5:.*]], !tbaa61; CHECK-NEXT: ret void, !dbg62; CHECK-NEXT: }63; CHECK: attributes #[[v5]] = { memory(argmem: write) }64 65; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)66declare void @llvm.dbg.declare(metadata, metadata, metadata) #167 68; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)69declare ptr @llvm.preserve.static.offset(ptr readnone) #170 71; Function Attrs: nocallback nofree nosync nounwind willreturn memory(none)72declare ptr @llvm.preserve.struct.access.index.p0.p0(ptr, i32 immarg, i32 immarg) #273 74; Function Attrs: nocallback nofree nosync nounwind willreturn memory(none)75declare ptr @llvm.preserve.union.access.index.p0.p0(ptr, i32 immarg) #276 77; Function Attrs: nocallback nofree nosync nounwind willreturn memory(none)78declare ptr @llvm.preserve.array.access.index.p0.p0(ptr, i32 immarg, i32 immarg) #279 80; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)81declare void @llvm.dbg.value(metadata, metadata, metadata) #182 83attributes #0 = { nounwind "no-trapping-math"="true" "stack-protector-buffer-size"="8" }84attributes #1 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }85attributes #2 = { nocallback nofree nosync nounwind willreturn memory(none) }86 87!llvm.dbg.cu = !{!0}88!llvm.module.flags = !{!28, !29}89!llvm.ident = !{!30}90 91!0 = distinct !DICompileUnit(language: DW_LANG_C11, file: !1, producer: "clang", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, retainedTypes: !2, splitDebugInlining: false, nameTableKind: None)92!1 = !DIFile(filename: "some-file.c", directory: "/some/dir/")93!2 = !{!3, !21}94!3 = distinct !DICompositeType(tag: DW_TAG_union_type, scope: !4, file: !1, line: 17, size: 448, elements: !11)95!4 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "buz", file: !1, line: 13, size: 544, elements: !5)96!5 = !{!6, !8, !9, !10}97!6 = !DIDerivedType(tag: DW_TAG_member, name: "_1", scope: !4, file: !1, line: 14, baseType: !7, size: 32)98!7 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)99!8 = !DIDerivedType(tag: DW_TAG_member, name: "_2", scope: !4, file: !1, line: 15, baseType: !7, size: 32, offset: 32)100!9 = !DIDerivedType(tag: DW_TAG_member, name: "_3", scope: !4, file: !1, line: 16, baseType: !7, size: 32, offset: 64)101!10 = !DIDerivedType(tag: DW_TAG_member, scope: !4, file: !1, line: 17, baseType: !3, size: 448, offset: 96)102!11 = !{!12, !20}103!12 = !DIDerivedType(tag: DW_TAG_member, name: "a", scope: !3, file: !1, line: 18, baseType: !13, size: 80)104!13 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "foo", file: !1, line: 4, size: 80, elements: !14)105!14 = !{!15}106!15 = !DIDerivedType(tag: DW_TAG_member, name: "a", scope: !13, file: !1, line: 5, baseType: !16, size: 80)107!16 = !DICompositeType(tag: DW_TAG_array_type, baseType: !17, size: 80, elements: !18)108!17 = !DIBasicType(name: "char", size: 8, encoding: DW_ATE_signed_char)109!18 = !{!19}110!19 = !DISubrange(count: 10)111!20 = !DIDerivedType(tag: DW_TAG_member, name: "b", scope: !3, file: !1, line: 19, baseType: !21, size: 448)112!21 = !DICompositeType(tag: DW_TAG_array_type, baseType: !22, size: 448, elements: !26)113!22 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "bar", file: !1, line: 8, size: 64, elements: !23)114!23 = !{!24, !25}115!24 = !DIDerivedType(tag: DW_TAG_member, name: "a", scope: !22, file: !1, line: 9, baseType: !7, size: 32)116!25 = !DIDerivedType(tag: DW_TAG_member, name: "b", scope: !22, file: !1, line: 10, baseType: !7, size: 32, offset: 32)117!26 = !{!27}118!27 = !DISubrange(count: 7)119!28 = !{i32 2, !"Debug Info Version", i32 3}120!29 = !{i32 1, !"wchar_size", i32 4}121!30 = !{!"clang"}122!31 = distinct !DISubprogram(name: "quux", scope: !1, file: !1, line: 23, type: !32, scopeLine: 23, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !35)123!32 = !DISubroutineType(types: !33)124!33 = !{null, !34}125!34 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !4, size: 64)126!35 = !{!36}127!36 = !DILocalVariable(name: "p", arg: 1, scope: !31, file: !1, line: 23, type: !34)128!37 = !DILocation(line: 0, scope: !31)129!38 = !DILocation(line: 24, column: 6, scope: !31)130!39 = !DILocation(line: 24, column: 3, scope: !31)131!40 = !DILocation(line: 24, column: 11, scope: !31)132!41 = !DILocation(line: 24, column: 13, scope: !31)133!42 = !{!43, !43, i64 0}134!43 = !{!"omnipotent char", !44, i64 0}135!44 = !{!"Simple C/C++ TBAA"}136!45 = !DILocation(line: 25, column: 1, scope: !31)137