1; RUN: opt -O2 %s | llvm-dis > %t1 2; RUN: llc -filetype=asm -o - %t1 | FileCheck -check-prefixes=CHECK,CHECK-ALU64 %s 3; RUN: llc -mattr=+alu32 -filetype=asm -o - %t1 | FileCheck -check-prefixes=CHECK,CHECK-ALU32 %s 4; Source code: 5; enum A { AA = -1, AB = 0, }; 6; enum B { BA = 0, BB = 1, }; 7; typedef enum A __A; 8; typedef enum B __B; 9; typedef struct s1 { __A a1[10]; __B a2[10][10]; } __s1; 10; union u1 { int b1; __s1 b2; }; 11; enum { FIELD_SIGNEDNESS = 3, }; 12; int test(union u1 *arg) { 13; unsigned r1 = __builtin_preserve_field_info(arg->b2.a1[5], FIELD_SIGNEDNESS); 14; unsigned r2 = __builtin_preserve_field_info(arg->b2.a2[5][5], FIELD_SIGNEDNESS); 15; /* r1 : 1, r2 : 0 */ 16; return r1 + r2; 17; } 18; Compilation flag: 19; clang -target bpf -O2 -g -S -emit-llvm -Xclang -disable-llvm-passes test.c 20 21target triple = "bpf" 22 23%union.u1 = type { %struct.s1 } 24%struct.s1 = type { [10 x i32], [10 x [10 x i32]] } 25 26; Function Attrs: nounwind readnone 27define dso_local i32 @test(%union.u1* %arg) local_unnamed_addr #0 !dbg !29 { 28entry: 29 call void @llvm.dbg.value(metadata %union.u1* %arg, metadata !43, metadata !DIExpression()), !dbg !46 30 %0 = tail call %union.u1* @llvm.preserve.union.access.index.p0s_union.u1s.p0s_union.u1s(%union.u1* %arg, i32 1), !dbg !47, !llvm.preserve.access.index !33 31 %b2 = getelementptr inbounds %union.u1, %union.u1* %0, i64 0, i32 0, !dbg !47 32 %1 = tail call [10 x i32]* @llvm.preserve.struct.access.index.p0a10i32.p0s_struct.s1s(%struct.s1* elementtype(%struct.s1) %b2, i32 0, i32 0), !dbg !48, !llvm.preserve.access.index !38 33 %2 = tail call i32* @llvm.preserve.array.access.index.p0i32.p0a10i32([10 x i32]* elementtype([10 x i32]) %1, i32 1, i32 5), !dbg !49, !llvm.preserve.access.index !17 34 %3 = tail call i32 @llvm.bpf.preserve.field.info.p0i32(i32* %2, i64 3), !dbg !50 35 call void @llvm.dbg.value(metadata i32 %3, metadata !44, metadata !DIExpression()), !dbg !46 36 %4 = tail call [10 x [10 x i32]]* @llvm.preserve.struct.access.index.p0a10a10i32.p0s_struct.s1s(%struct.s1* elementtype(%struct.s1) %b2, i32 1, i32 1), !dbg !51, !llvm.preserve.access.index !38 37 %5 = tail call [10 x i32]* @llvm.preserve.array.access.index.p0a10i32.p0a10a10i32([10 x [10 x i32]]* elementtype([10 x [10 x i32]]) %4, i32 1, i32 5), !dbg !52, !llvm.preserve.access.index !21 38 %6 = tail call i32* @llvm.preserve.array.access.index.p0i32.p0a10i32([10 x i32]* elementtype([10 x i32]) %5, i32 1, i32 5), !dbg !52, !llvm.preserve.access.index !24 39 %7 = tail call i32 @llvm.bpf.preserve.field.info.p0i32(i32* %6, i64 3), !dbg !53 40 call void @llvm.dbg.value(metadata i32 %7, metadata !45, metadata !DIExpression()), !dbg !46 41 %add = add i32 %7, %3, !dbg !54 42 ret i32 %add, !dbg !55 43} 44 45; CHECK: r1 = 1 46; CHECK: r0 = 0 47; CHECK-ALU64: r0 += r1 48; CHECK-ALU32: w0 += w1 49; CHECK: exit 50 51; CHECK: .long 1 # BTF_KIND_UNION(id = 2) 52; CHECK: .ascii "u1" # string offset=1 53; CHECK: .ascii ".text" # string offset=81 54; CHECK: .ascii "0:1:0:5" # string offset=87 55; CHECK: .ascii "0:1:1:5:5" # string offset=132 56 57; CHECK: .long 16 # FieldReloc 58; CHECK-NEXT: .long 81 # Field reloc section string offset=81 59; CHECK-NEXT: .long 2 60; CHECK-NEXT: .long .Ltmp{{[0-9]+}} 61; CHECK-NEXT: .long 2 62; CHECK-NEXT: .long 87 63; CHECK-NEXT: .long 3 64; CHECK-NEXT: .long .Ltmp{{[0-9]+}} 65; CHECK-NEXT: .long 2 66; CHECK-NEXT: .long 132 67; CHECK-NEXT: .long 3 68 69; Function Attrs: nounwind readnone 70declare %union.u1* @llvm.preserve.union.access.index.p0s_union.u1s.p0s_union.u1s(%union.u1*, i32) #1 71 72; Function Attrs: nounwind readnone 73declare [10 x i32]* @llvm.preserve.struct.access.index.p0a10i32.p0s_struct.s1s(%struct.s1*, i32, i32) #1 74 75; Function Attrs: nounwind readnone 76declare i32* @llvm.preserve.array.access.index.p0i32.p0a10i32([10 x i32]*, i32, i32) #1 77 78; Function Attrs: nounwind readnone 79declare i32 @llvm.bpf.preserve.field.info.p0i32(i32*, i64) #1 80 81; Function Attrs: nounwind readnone 82declare [10 x [10 x i32]]* @llvm.preserve.struct.access.index.p0a10a10i32.p0s_struct.s1s(%struct.s1*, i32, i32) #1 83 84; Function Attrs: nounwind readnone 85declare [10 x i32]* @llvm.preserve.array.access.index.p0a10i32.p0a10a10i32([10 x [10 x i32]]*, i32, i32) #1 86 87; Function Attrs: nounwind readnone speculatable willreturn 88declare void @llvm.dbg.value(metadata, metadata, metadata) #2 89 90attributes #0 = { nounwind readnone "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" } 91attributes #1 = { nounwind readnone } 92attributes #2 = { nounwind readnone speculatable willreturn } 93 94!llvm.dbg.cu = !{!0} 95!llvm.module.flags = !{!25, !26, !27} 96!llvm.ident = !{!28} 97 98!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 10.0.0 (https://github.com/llvm/llvm-project.git c1e02f16f1105ffaf1c35ee8bc38b7d6db5c6ea9)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, retainedTypes: !16, nameTableKind: None) 99!1 = !DIFile(filename: "test.c", directory: "/tmp/home/yhs/work/tests/core") 100!2 = !{!3, !8, !13} 101!3 = !DICompositeType(tag: DW_TAG_enumeration_type, name: "A", file: !1, line: 1, baseType: !4, size: 32, elements: !5) 102!4 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed) 103!5 = !{!6, !7} 104!6 = !DIEnumerator(name: "AA", value: -1) 105!7 = !DIEnumerator(name: "AB", value: 0) 106!8 = !DICompositeType(tag: DW_TAG_enumeration_type, name: "B", file: !1, line: 2, baseType: !9, size: 32, elements: !10) 107!9 = !DIBasicType(name: "unsigned int", size: 32, encoding: DW_ATE_unsigned) 108!10 = !{!11, !12} 109!11 = !DIEnumerator(name: "BA", value: 0, isUnsigned: true) 110!12 = !DIEnumerator(name: "BB", value: 1, isUnsigned: true) 111!13 = !DICompositeType(tag: DW_TAG_enumeration_type, file: !1, line: 7, baseType: !9, size: 32, elements: !14) 112!14 = !{!15} 113!15 = !DIEnumerator(name: "FIELD_SIGNEDNESS", value: 3, isUnsigned: true) 114!16 = !{!17, !21, !24} 115!17 = !DICompositeType(tag: DW_TAG_array_type, baseType: !18, size: 320, elements: !19) 116!18 = !DIDerivedType(tag: DW_TAG_typedef, name: "__A", file: !1, line: 3, baseType: !3) 117!19 = !{!20} 118!20 = !DISubrange(count: 10) 119!21 = !DICompositeType(tag: DW_TAG_array_type, baseType: !22, size: 3200, elements: !23) 120!22 = !DIDerivedType(tag: DW_TAG_typedef, name: "__B", file: !1, line: 4, baseType: !8) 121!23 = !{!20, !20} 122!24 = !DICompositeType(tag: DW_TAG_array_type, baseType: !22, size: 320, elements: !19) 123!25 = !{i32 2, !"Dwarf Version", i32 4} 124!26 = !{i32 2, !"Debug Info Version", i32 3} 125!27 = !{i32 1, !"wchar_size", i32 4} 126!28 = !{!"clang version 10.0.0 (https://github.com/llvm/llvm-project.git c1e02f16f1105ffaf1c35ee8bc38b7d6db5c6ea9)"} 127!29 = distinct !DISubprogram(name: "test", scope: !1, file: !1, line: 8, type: !30, scopeLine: 8, flags: DIFlagPrototyped, isDefinition: true, isOptimized: true, unit: !0, retainedNodes: !42) 128!30 = !DISubroutineType(types: !31) 129!31 = !{!4, !32} 130!32 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !33, size: 64) 131!33 = distinct !DICompositeType(tag: DW_TAG_union_type, name: "u1", file: !1, line: 6, size: 3520, elements: !34) 132!34 = !{!35, !36} 133!35 = !DIDerivedType(tag: DW_TAG_member, name: "b1", scope: !33, file: !1, line: 6, baseType: !4, size: 32) 134!36 = !DIDerivedType(tag: DW_TAG_member, name: "b2", scope: !33, file: !1, line: 6, baseType: !37, size: 3520) 135!37 = !DIDerivedType(tag: DW_TAG_typedef, name: "__s1", file: !1, line: 5, baseType: !38) 136!38 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "s1", file: !1, line: 5, size: 3520, elements: !39) 137!39 = !{!40, !41} 138!40 = !DIDerivedType(tag: DW_TAG_member, name: "a1", scope: !38, file: !1, line: 5, baseType: !17, size: 320) 139!41 = !DIDerivedType(tag: DW_TAG_member, name: "a2", scope: !38, file: !1, line: 5, baseType: !21, size: 3200, offset: 320) 140!42 = !{!43, !44, !45} 141!43 = !DILocalVariable(name: "arg", arg: 1, scope: !29, file: !1, line: 8, type: !32) 142!44 = !DILocalVariable(name: "r1", scope: !29, file: !1, line: 9, type: !9) 143!45 = !DILocalVariable(name: "r2", scope: !29, file: !1, line: 10, type: !9) 144!46 = !DILocation(line: 0, scope: !29) 145!47 = !DILocation(line: 9, column: 52, scope: !29) 146!48 = !DILocation(line: 9, column: 55, scope: !29) 147!49 = !DILocation(line: 9, column: 47, scope: !29) 148!50 = !DILocation(line: 9, column: 17, scope: !29) 149!51 = !DILocation(line: 10, column: 55, scope: !29) 150!52 = !DILocation(line: 10, column: 47, scope: !29) 151!53 = !DILocation(line: 10, column: 17, scope: !29) 152!54 = !DILocation(line: 12, column: 13, scope: !29) 153!55 = !DILocation(line: 12, column: 3, scope: !29) 154