1; RUN: opt -passes=bpf-preserve-static-offset -mtriple=bpf-pc-linux -S -o - %s | FileCheck %s 2; 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: nounwind 40define 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 !37 43 %0 = call ptr @llvm.preserve.static.offset(ptr %p), !dbg !38 44 %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 !4 45 %2 = call ptr @llvm.preserve.union.access.index.p0.p0(ptr %1, i32 1), !dbg !38, !llvm.preserve.access.index !3 46 %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 !21 47 %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 !22 48 store i32 42, ptr %4, align 4, !dbg !41, !tbaa !42 49 ret void, !dbg !45 50} 51 52; CHECK: define dso_local void @quux(ptr noundef %[[p:.*]]) {{.*}} { 53; CHECK-NEXT: entry: 54; CHECK-NEXT: #dbg_value 55; CHECK-NEXT: call void (i32, ptr, i1, i8, i8, i8, i1, ...) 56; CHECK-SAME: @llvm.bpf.getelementptr.and.store.i32 57; 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:.*]], !tbaa 61; CHECK-NEXT: ret void, !dbg 62; 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) #1 67 68; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none) 69declare ptr @llvm.preserve.static.offset(ptr readnone) #1 70 71; Function Attrs: nocallback nofree nosync nounwind willreturn memory(none) 72declare ptr @llvm.preserve.struct.access.index.p0.p0(ptr, i32 immarg, i32 immarg) #2 73 74; Function Attrs: nocallback nofree nosync nounwind willreturn memory(none) 75declare ptr @llvm.preserve.union.access.index.p0.p0(ptr, i32 immarg) #2 76 77; Function Attrs: nocallback nofree nosync nounwind willreturn memory(none) 78declare ptr @llvm.preserve.array.access.index.p0.p0(ptr, i32 immarg, i32 immarg) #2 79 80; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none) 81declare void @llvm.dbg.value(metadata, metadata, metadata) #1 82 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