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1; RUN: opt -O2 %s | llvm-dis > %t12; RUN: llc -mcpu=v1 -filetype=asm -o - %t1 | FileCheck -check-prefixes=CHECK,CHECK-ALU64 %s3; RUN: llc -mcpu=v1 -mattr=+alu32 -filetype=asm -o - %t1 | FileCheck -check-prefixes=CHECK,CHECK-ALU32 %s4; Source code:5; enum A { AA = -1, AB = 0, }; /* signed */6; enum B { BA = 0, BB = 1, }; /* unsigned */7; typedef enum A __A;8; typedef enum B __B;9; typedef int __int; /* signed */10; struct s1 { __A a1; __B a2:9; __int a3:4; };11; union u1 { int b1; struct s1 b2; };12; enum { FIELD_SIGNEDNESS = 3, };13; int test(union u1 *arg) {14; unsigned r1 = __builtin_preserve_field_info(arg->b2.a1, FIELD_SIGNEDNESS);15; unsigned r2 = __builtin_preserve_field_info(arg->b2.a2, FIELD_SIGNEDNESS);16; unsigned r3 = __builtin_preserve_field_info(arg->b2.a3, FIELD_SIGNEDNESS);17; return r1 + r2 + r3;18; }19; Compilation flag:20; clang -target bpf -O2 -g -S -emit-llvm -Xclang -disable-llvm-passes test.c21 22target triple = "bpf"23 24%union.u1 = type { %struct.s1 }25%struct.s1 = type { i32, i16 }26 27; Function Attrs: nounwind readnone28define dso_local i32 @test(ptr %arg) local_unnamed_addr !dbg !20 {29entry:30 call void @llvm.dbg.value(metadata ptr %arg, metadata !37, metadata !DIExpression()), !dbg !4131 %0 = tail call ptr @llvm.preserve.union.access.index.p0.u1s.p0.u1s(ptr %arg, i32 1), !dbg !42, !llvm.preserve.access.index !2432 %1 = tail call ptr @llvm.preserve.struct.access.index.p0.p0.s1s(ptr elementtype(%struct.s1) %0, i32 0, i32 0), !dbg !43, !llvm.preserve.access.index !2833 %2 = tail call i32 @llvm.bpf.preserve.field.info.p0(ptr %1, i64 3), !dbg !4434 call void @llvm.dbg.value(metadata i32 %2, metadata !38, metadata !DIExpression()), !dbg !4135 %3 = tail call ptr @llvm.preserve.struct.access.index.p0.p0.s1s(ptr elementtype(%struct.s1) %0, i32 1, i32 1), !dbg !45, !llvm.preserve.access.index !2836 %4 = tail call i32 @llvm.bpf.preserve.field.info.p0(ptr %3, i64 3), !dbg !4637 call void @llvm.dbg.value(metadata i32 %4, metadata !39, metadata !DIExpression()), !dbg !4138 %5 = tail call ptr @llvm.preserve.struct.access.index.p0.p0.s1s(ptr elementtype(%struct.s1) %0, i32 1, i32 2), !dbg !47, !llvm.preserve.access.index !2839 %6 = tail call i32 @llvm.bpf.preserve.field.info.p0(ptr %5, i64 3), !dbg !4840 call void @llvm.dbg.value(metadata i32 %6, metadata !40, metadata !DIExpression()), !dbg !4141 %add = add i32 %4, %2, !dbg !4942 %add3 = add i32 %add, %6, !dbg !5043 ret i32 %add3, !dbg !5144}45 46; CHECK: r1 = 147; CHECK: r0 = 048; CHECK-ALU64: r0 += r149; CHECK-ALU32: w0 += w150; CHECK: r1 = 151; CHECK-ALU64: r0 += r152; CHECK-ALU32: w0 += w153; CHECK: exit54 55; CHECK: .long 1 # BTF_KIND_UNION(id = 2)56; CHECK: .ascii "u1" # string offset=157; CHECK: .ascii ".text" # string offset=6558; CHECK: .ascii "0:1:0" # string offset=7159; CHECK: .ascii "0:1:1" # string offset=11460; CHECK: .ascii "0:1:2" # string offset=12061 62; CHECK: .long 16 # FieldReloc63; CHECK-NEXT: .long 65 # Field reloc section string offset=6564; CHECK-NEXT: .long 365; CHECK-NEXT: .long .Ltmp{{[0-9]+}}66; CHECK-NEXT: .long 267; CHECK-NEXT: .long 7168; CHECK-NEXT: .long 369; CHECK-NEXT: .long .Ltmp{{[0-9]+}}70; CHECK-NEXT: .long 271; CHECK-NEXT: .long 11472; CHECK-NEXT: .long 373; CHECK-NEXT: .long .Ltmp{{[0-9]+}}74; CHECK-NEXT: .long 275; CHECK-NEXT: .long 12076; CHECK-NEXT: .long 377 78; Function Attrs: nounwind readnone79declare ptr @llvm.preserve.union.access.index.p0.u1s.p0.u1s(ptr, i32)80 81; Function Attrs: nounwind readnone82declare ptr @llvm.preserve.struct.access.index.p0.p0.s1s(ptr, i32, i32)83 84; Function Attrs: nounwind readnone85declare i32 @llvm.bpf.preserve.field.info.p0(ptr, i64)86 87; Function Attrs: nounwind readnone88 89; Function Attrs: nounwind readnone90 91; Function Attrs: nounwind readnone speculatable willreturn92declare void @llvm.dbg.value(metadata, metadata, metadata)93 94!llvm.dbg.cu = !{!0}95!llvm.module.flags = !{!16, !17, !18}96!llvm.ident = !{!19}97 98!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 10.0.0 (https://github.com/llvm/llvm-project.git 4a60741b74384f14b21fdc0131ede326438840ab)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, 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: 8, baseType: !9, size: 32, elements: !14)112!14 = !{!15}113!15 = !DIEnumerator(name: "FIELD_SIGNEDNESS", value: 3, isUnsigned: true)114!16 = !{i32 2, !"Dwarf Version", i32 4}115!17 = !{i32 2, !"Debug Info Version", i32 3}116!18 = !{i32 1, !"wchar_size", i32 4}117!19 = !{!"clang version 10.0.0 (https://github.com/llvm/llvm-project.git 4a60741b74384f14b21fdc0131ede326438840ab)"}118!20 = distinct !DISubprogram(name: "test", scope: !1, file: !1, line: 9, type: !21, scopeLine: 9, flags: DIFlagPrototyped, isDefinition: true, isOptimized: true, unit: !0, retainedNodes: !36)119!21 = !DISubroutineType(types: !22)120!22 = !{!4, !23}121!23 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !24, size: 64)122!24 = distinct !DICompositeType(tag: DW_TAG_union_type, name: "u1", file: !1, line: 7, size: 64, elements: !25)123!25 = !{!26, !27}124!26 = !DIDerivedType(tag: DW_TAG_member, name: "b1", scope: !24, file: !1, line: 7, baseType: !4, size: 32)125!27 = !DIDerivedType(tag: DW_TAG_member, name: "b2", scope: !24, file: !1, line: 7, baseType: !28, size: 64)126!28 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "s1", file: !1, line: 6, size: 64, elements: !29)127!29 = !{!30, !32, !34}128!30 = !DIDerivedType(tag: DW_TAG_member, name: "a1", scope: !28, file: !1, line: 6, baseType: !31, size: 32)129!31 = !DIDerivedType(tag: DW_TAG_typedef, name: "__A", file: !1, line: 3, baseType: !3)130!32 = !DIDerivedType(tag: DW_TAG_member, name: "a2", scope: !28, file: !1, line: 6, baseType: !33, size: 9, offset: 32, flags: DIFlagBitField, extraData: i64 32)131!33 = !DIDerivedType(tag: DW_TAG_typedef, name: "__B", file: !1, line: 4, baseType: !8)132!34 = !DIDerivedType(tag: DW_TAG_member, name: "a3", scope: !28, file: !1, line: 6, baseType: !35, size: 4, offset: 41, flags: DIFlagBitField, extraData: i64 32)133!35 = !DIDerivedType(tag: DW_TAG_typedef, name: "__int", file: !1, line: 5, baseType: !4)134!36 = !{!37, !38, !39, !40}135!37 = !DILocalVariable(name: "arg", arg: 1, scope: !20, file: !1, line: 9, type: !23)136!38 = !DILocalVariable(name: "r1", scope: !20, file: !1, line: 10, type: !9)137!39 = !DILocalVariable(name: "r2", scope: !20, file: !1, line: 11, type: !9)138!40 = !DILocalVariable(name: "r3", scope: !20, file: !1, line: 12, type: !9)139!41 = !DILocation(line: 0, scope: !20)140!42 = !DILocation(line: 10, column: 52, scope: !20)141!43 = !DILocation(line: 10, column: 55, scope: !20)142!44 = !DILocation(line: 10, column: 17, scope: !20)143!45 = !DILocation(line: 11, column: 55, scope: !20)144!46 = !DILocation(line: 11, column: 17, scope: !20)145!47 = !DILocation(line: 12, column: 55, scope: !20)146!48 = !DILocation(line: 12, column: 17, scope: !20)147!49 = !DILocation(line: 13, column: 13, scope: !20)148!50 = !DILocation(line: 13, column: 18, scope: !20)149!51 = !DILocation(line: 13, column: 3, scope: !20)150