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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 bar {8; int a[7];9; } __pai __ctx;10; 11; int buz(struct bar *p) {12; return p->a[5];13; }14; 15; Compilation flag:16; clang -cc1 -O2 -triple bpf -S -emit-llvm -disable-llvm-passes -debug-info-kind=limited -o - \17; | opt -passes=function(sroa) -S -o -18 19%struct.bar = type { [7 x i32] }20 21; Function Attrs: nounwind22define dso_local i32 @buz(ptr noundef %p) #0 !dbg !10 {23entry:24 call void @llvm.dbg.value(metadata ptr %p, metadata !18, metadata !DIExpression()), !dbg !1925 %0 = call ptr @llvm.preserve.static.offset(ptr %p), !dbg !2026 %1 = call ptr @llvm.preserve.struct.access.index.p0.p0(ptr elementtype(%struct.bar) %0, i32 0, i32 0), !dbg !20, !llvm.preserve.access.index !1427 %2 = call ptr @llvm.preserve.array.access.index.p0.p0(ptr elementtype([7 x i32]) %1, i32 1, i32 5), !dbg !21, !llvm.preserve.access.index !328 %3 = load i32, ptr %2, align 4, !dbg !21, !tbaa !2229 ret i32 %3, !dbg !2630}31 32; CHECK: define dso_local i32 @buz(ptr noundef %[[p:.*]]) {{.*}} {33; CHECK-NEXT: entry:34; CHECK-NEXT: #dbg_value35; CHECK-NEXT: %[[v5:.*]] = call i32 (ptr, i1, i8, i8, i8, i1, ...)36; CHECK-SAME: @llvm.bpf.getelementptr.and.load.i3237; CHECK-SAME: (ptr readonly elementtype(%struct.bar) %[[p]],38; CHECK-SAME: i1 false, i8 0, i8 1, i8 2, i1 true, i32 immarg 0, i32 immarg 0, i32 immarg 5)39; CHECK-SAME: #[[v6:.*]], !tbaa40; CHECK-NEXT: ret i32 %[[v5]]41; CHECK-NEXT: }42; CHECK: attributes #[[v6]] = { memory(argmem: read) }43 44; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)45declare void @llvm.dbg.declare(metadata, metadata, metadata) #146 47; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)48declare ptr @llvm.preserve.static.offset(ptr readnone) #149 50; Function Attrs: nocallback nofree nosync nounwind willreturn memory(none)51declare ptr @llvm.preserve.struct.access.index.p0.p0(ptr, i32 immarg, i32 immarg) #252 53; Function Attrs: nocallback nofree nosync nounwind willreturn memory(none)54declare ptr @llvm.preserve.array.access.index.p0.p0(ptr, i32 immarg, i32 immarg) #255 56; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)57declare void @llvm.dbg.value(metadata, metadata, metadata) #158 59attributes #0 = { nounwind "no-trapping-math"="true" "stack-protector-buffer-size"="8" }60attributes #1 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }61attributes #2 = { nocallback nofree nosync nounwind willreturn memory(none) }62 63!llvm.dbg.cu = !{!0}64!llvm.module.flags = !{!7, !8}65!llvm.ident = !{!9}66 67!0 = distinct !DICompileUnit(language: DW_LANG_C11, file: !1, producer: "clang", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, retainedTypes: !2, splitDebugInlining: false, nameTableKind: None)68!1 = !DIFile(filename: "some-file.c", directory: "/some/dir/")69!2 = !{!3}70!3 = !DICompositeType(tag: DW_TAG_array_type, baseType: !4, size: 224, elements: !5)71!4 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)72!5 = !{!6}73!6 = !DISubrange(count: 7)74!7 = !{i32 2, !"Debug Info Version", i32 3}75!8 = !{i32 1, !"wchar_size", i32 4}76!9 = !{!"clang"}77!10 = distinct !DISubprogram(name: "buz", scope: !1, file: !1, line: 8, type: !11, scopeLine: 8, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !17)78!11 = !DISubroutineType(types: !12)79!12 = !{!4, !13}80!13 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !14, size: 64)81!14 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "bar", file: !1, line: 4, size: 224, elements: !15)82!15 = !{!16}83!16 = !DIDerivedType(tag: DW_TAG_member, name: "a", scope: !14, file: !1, line: 5, baseType: !3, size: 224)84!17 = !{!18}85!18 = !DILocalVariable(name: "p", arg: 1, scope: !10, file: !1, line: 8, type: !13)86!19 = !DILocation(line: 0, scope: !10)87!20 = !DILocation(line: 9, column: 13, scope: !10)88!21 = !DILocation(line: 9, column: 10, scope: !10)89!22 = !{!23, !23, i64 0}90!23 = !{!"int", !24, i64 0}91!24 = !{!"omnipotent char", !25, i64 0}92!25 = !{!"Simple C/C++ TBAA"}93!26 = !DILocation(line: 9, column: 3, scope: !10)94