1 ; RUN: llc -march=bpfel -filetype=asm -o - %s | FileCheck -check-prefixes=CHECK %s
2 ; RUN: llc -march=bpfeb -filetype=asm -o - %s | FileCheck -check-prefixes=CHECK %s
4 ; typedef struct s1 { int a1:7; int a2:4; int a3:5; int a4:16;} __s1;
5 ; union u1 { int b1; __s1 b2; };
6 ; enum { FIELD_RSHIFT_U64 = 5, };
7 ; int test(union u1 *arg) {
8 ; unsigned r1 = __builtin_preserve_field_info(arg->b2.a1, FIELD_RSHIFT_U64);
9 ; unsigned r2 = __builtin_preserve_field_info(arg->b2.a2, FIELD_RSHIFT_U64);
10 ; unsigned r3 = __builtin_preserve_field_info(arg->b2.a3, FIELD_RSHIFT_U64);
11 ; unsigned r4 = __builtin_preserve_field_info(arg->b2.a4, FIELD_RSHIFT_U64);
12 ; /* r1: 57, r2: 60, r3: 59, r4: 48 */
13 ; return r1 + r2 + r3 + r4;
16 ; clang -target bpf -O2 -g -S -emit-llvm test.c
18 %union.u1 = type { i32 }
19 %struct.s1 = type { i32 }
21 ; Function Attrs: nounwind readnone
22 define dso_local i32 @test(%union.u1* %arg) local_unnamed_addr #0 !dbg !11 {
24 call void @llvm.dbg.value(metadata %union.u1* %arg, metadata !28, metadata !DIExpression()), !dbg !33
25 %0 = tail call %union.u1* @llvm.preserve.union.access.index.p0s_union.u1s.p0s_union.u1s(%union.u1* %arg, i32 1), !dbg !34, !llvm.preserve.access.index !16
26 %b2 = bitcast %union.u1* %0 to %struct.s1*, !dbg !34
27 %1 = tail call i32* @llvm.preserve.struct.access.index.p0i32.p0s_struct.s1s(%struct.s1* %b2, i32 0, i32 0), !dbg !35, !llvm.preserve.access.index !21
28 %2 = tail call i32 @llvm.bpf.preserve.field.info.p0i32(i32* %1, i64 5), !dbg !36
29 call void @llvm.dbg.value(metadata i32 %2, metadata !29, metadata !DIExpression()), !dbg !33
30 %3 = tail call i32* @llvm.preserve.struct.access.index.p0i32.p0s_struct.s1s(%struct.s1* %b2, i32 0, i32 1), !dbg !37, !llvm.preserve.access.index !21
31 %4 = tail call i32 @llvm.bpf.preserve.field.info.p0i32(i32* %3, i64 5), !dbg !38
32 call void @llvm.dbg.value(metadata i32 %4, metadata !30, metadata !DIExpression()), !dbg !33
33 %5 = tail call i32* @llvm.preserve.struct.access.index.p0i32.p0s_struct.s1s(%struct.s1* %b2, i32 0, i32 2), !dbg !39, !llvm.preserve.access.index !21
34 %6 = tail call i32 @llvm.bpf.preserve.field.info.p0i32(i32* %5, i64 5), !dbg !40
35 call void @llvm.dbg.value(metadata i32 %6, metadata !31, metadata !DIExpression()), !dbg !33
36 %7 = tail call i32* @llvm.preserve.struct.access.index.p0i32.p0s_struct.s1s(%struct.s1* %b2, i32 0, i32 3), !dbg !41, !llvm.preserve.access.index !21
37 %8 = tail call i32 @llvm.bpf.preserve.field.info.p0i32(i32* %7, i64 5), !dbg !42
38 call void @llvm.dbg.value(metadata i32 %8, metadata !32, metadata !DIExpression()), !dbg !33
39 %add = add i32 %4, %2, !dbg !43
40 %add4 = add i32 %add, %6, !dbg !44
41 %add5 = add i32 %add4, %8, !dbg !45
42 ret i32 %add5, !dbg !46
54 ; CHECK: .long 1 # BTF_KIND_UNION(id = 2)
55 ; CHECK: .ascii "u1" # string offset=1
56 ; CHECK: .ascii ".text" # string offset=43
57 ; CHECK: .ascii "0:1:0" # string offset=49
58 ; CHECK: .ascii "0:1:1" # string offset=92
59 ; CHECK: .ascii "0:1:2" # string offset=98
60 ; CHECK: .ascii "0:1:3" # string offset=104
62 ; CHECK: .long 16 # FieldReloc
63 ; CHECK-NEXT: .long 43 # Field reloc section string offset=43
65 ; CHECK-NEXT: .long .Ltmp{{[0-9]+}}
67 ; CHECK-NEXT: .long 49
69 ; CHECK-NEXT: .long .Ltmp{{[0-9]+}}
71 ; CHECK-NEXT: .long 92
73 ; CHECK-NEXT: .long .Ltmp{{[0-9]+}}
75 ; CHECK-NEXT: .long 98
77 ; CHECK-NEXT: .long .Ltmp{{[0-9]+}}
79 ; CHECK-NEXT: .long 104
82 ; Function Attrs: nounwind readnone
83 declare %union.u1* @llvm.preserve.union.access.index.p0s_union.u1s.p0s_union.u1s(%union.u1*, i32) #1
85 ; Function Attrs: nounwind readnone
86 declare i32* @llvm.preserve.struct.access.index.p0i32.p0s_struct.s1s(%struct.s1*, i32, i32) #1
88 ; Function Attrs: nounwind readnone
89 declare i32 @llvm.bpf.preserve.field.info.p0i32(i32*, i64) #1
91 ; Function Attrs: nounwind readnone speculatable willreturn
92 declare void @llvm.dbg.value(metadata, metadata, metadata) #2
94 attributes #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" }
95 attributes #1 = { nounwind readnone }
96 attributes #2 = { nounwind readnone speculatable willreturn }
99 !llvm.module.flags = !{!7, !8, !9}
102 !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)
103 !1 = !DIFile(filename: "test.c", directory: "/tmp/home/yhs/work/tests/core")
105 !3 = !DICompositeType(tag: DW_TAG_enumeration_type, file: !1, line: 3, baseType: !4, size: 32, elements: !5)
106 !4 = !DIBasicType(name: "unsigned int", size: 32, encoding: DW_ATE_unsigned)
108 !6 = !DIEnumerator(name: "FIELD_RSHIFT_U64", value: 5, isUnsigned: true)
109 !7 = !{i32 2, !"Dwarf Version", i32 4}
110 !8 = !{i32 2, !"Debug Info Version", i32 3}
111 !9 = !{i32 1, !"wchar_size", i32 4}
112 !10 = !{!"clang version 10.0.0 (https://github.com/llvm/llvm-project.git 4a60741b74384f14b21fdc0131ede326438840ab)"}
113 !11 = distinct !DISubprogram(name: "test", scope: !1, file: !1, line: 4, type: !12, scopeLine: 4, flags: DIFlagPrototyped, isDefinition: true, isOptimized: true, unit: !0, retainedNodes: !27)
114 !12 = !DISubroutineType(types: !13)
116 !14 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
117 !15 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !16, size: 64)
118 !16 = distinct !DICompositeType(tag: DW_TAG_union_type, name: "u1", file: !1, line: 2, size: 32, elements: !17)
120 !18 = !DIDerivedType(tag: DW_TAG_member, name: "b1", scope: !16, file: !1, line: 2, baseType: !14, size: 32)
121 !19 = !DIDerivedType(tag: DW_TAG_member, name: "b2", scope: !16, file: !1, line: 2, baseType: !20, size: 32)
122 !20 = !DIDerivedType(tag: DW_TAG_typedef, name: "__s1", file: !1, line: 1, baseType: !21)
123 !21 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "s1", file: !1, line: 1, size: 32, elements: !22)
124 !22 = !{!23, !24, !25, !26}
125 !23 = !DIDerivedType(tag: DW_TAG_member, name: "a1", scope: !21, file: !1, line: 1, baseType: !14, size: 7, flags: DIFlagBitField, extraData: i64 0)
126 !24 = !DIDerivedType(tag: DW_TAG_member, name: "a2", scope: !21, file: !1, line: 1, baseType: !14, size: 4, offset: 7, flags: DIFlagBitField, extraData: i64 0)
127 !25 = !DIDerivedType(tag: DW_TAG_member, name: "a3", scope: !21, file: !1, line: 1, baseType: !14, size: 5, offset: 11, flags: DIFlagBitField, extraData: i64 0)
128 !26 = !DIDerivedType(tag: DW_TAG_member, name: "a4", scope: !21, file: !1, line: 1, baseType: !14, size: 16, offset: 16, flags: DIFlagBitField, extraData: i64 0)
129 !27 = !{!28, !29, !30, !31, !32}
130 !28 = !DILocalVariable(name: "arg", arg: 1, scope: !11, file: !1, line: 4, type: !15)
131 !29 = !DILocalVariable(name: "r1", scope: !11, file: !1, line: 5, type: !4)
132 !30 = !DILocalVariable(name: "r2", scope: !11, file: !1, line: 6, type: !4)
133 !31 = !DILocalVariable(name: "r3", scope: !11, file: !1, line: 7, type: !4)
134 !32 = !DILocalVariable(name: "r4", scope: !11, file: !1, line: 8, type: !4)
135 !33 = !DILocation(line: 0, scope: !11)
136 !34 = !DILocation(line: 5, column: 52, scope: !11)
137 !35 = !DILocation(line: 5, column: 55, scope: !11)
138 !36 = !DILocation(line: 5, column: 17, scope: !11)
139 !37 = !DILocation(line: 6, column: 55, scope: !11)
140 !38 = !DILocation(line: 6, column: 17, scope: !11)
141 !39 = !DILocation(line: 7, column: 55, scope: !11)
142 !40 = !DILocation(line: 7, column: 17, scope: !11)
143 !41 = !DILocation(line: 8, column: 55, scope: !11)
144 !42 = !DILocation(line: 8, column: 17, scope: !11)
145 !43 = !DILocation(line: 10, column: 13, scope: !11)
146 !44 = !DILocation(line: 10, column: 18, scope: !11)
147 !45 = !DILocation(line: 10, column: 23, scope: !11)
148 !46 = !DILocation(line: 10, column: 3, scope: !11)