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
5 ; enum A { AA = -1, AB = 0, }; /* signed */
6 ; enum B { BA = 0, BB = 1, }; /* unsigned */
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;
20 ; clang -target bpf -O2 -g -S -emit-llvm -Xclang -disable-llvm-passes test.c
24 %union.u1 = type { %struct.s1 }
25 %struct.s1 = type { i32, i16 }
27 ; Function Attrs: nounwind readnone
28 define dso_local i32 @test(ptr %arg) local_unnamed_addr #0 !dbg !20 {
30 call void @llvm.dbg.value(metadata ptr %arg, metadata !37, metadata !DIExpression()), !dbg !41
31 %0 = tail call ptr @llvm.preserve.union.access.index.p0.u1s.p0.u1s(ptr %arg, i32 1), !dbg !42, !llvm.preserve.access.index !24
32 %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 !28
33 %2 = tail call i32 @llvm.bpf.preserve.field.info.p0(ptr %1, i64 3), !dbg !44
34 call void @llvm.dbg.value(metadata i32 %2, metadata !38, metadata !DIExpression()), !dbg !41
35 %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 !28
36 %4 = tail call i32 @llvm.bpf.preserve.field.info.p0(ptr %3, i64 3), !dbg !46
37 call void @llvm.dbg.value(metadata i32 %4, metadata !39, metadata !DIExpression()), !dbg !41
38 %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 !28
39 %6 = tail call i32 @llvm.bpf.preserve.field.info.p0(ptr %5, i64 3), !dbg !48
40 call void @llvm.dbg.value(metadata i32 %6, metadata !40, metadata !DIExpression()), !dbg !41
41 %add = add i32 %4, %2, !dbg !49
42 %add3 = add i32 %add, %6, !dbg !50
43 ret i32 %add3, !dbg !51
48 ; CHECK-ALU64: r0 += r1
49 ; CHECK-ALU32: w0 += w1
51 ; CHECK-ALU64: r0 += r1
52 ; CHECK-ALU32: w0 += w1
55 ; CHECK: .long 1 # BTF_KIND_UNION(id = 2)
56 ; CHECK: .ascii "u1" # string offset=1
57 ; CHECK: .ascii ".text" # string offset=65
58 ; CHECK: .ascii "0:1:0" # string offset=71
59 ; CHECK: .ascii "0:1:1" # string offset=114
60 ; CHECK: .ascii "0:1:2" # string offset=120
62 ; CHECK: .long 16 # FieldReloc
63 ; CHECK-NEXT: .long 65 # Field reloc section string offset=65
65 ; CHECK-NEXT: .long .Ltmp{{[0-9]+}}
67 ; CHECK-NEXT: .long 71
69 ; CHECK-NEXT: .long .Ltmp{{[0-9]+}}
71 ; CHECK-NEXT: .long 114
73 ; CHECK-NEXT: .long .Ltmp{{[0-9]+}}
75 ; CHECK-NEXT: .long 120
78 ; Function Attrs: nounwind readnone
79 declare ptr @llvm.preserve.union.access.index.p0.u1s.p0.u1s(ptr, i32) #1
81 ; Function Attrs: nounwind readnone
82 declare ptr @llvm.preserve.struct.access.index.p0.p0.s1s(ptr, i32, i32) #1
84 ; Function Attrs: nounwind readnone
85 declare i32 @llvm.bpf.preserve.field.info.p0(ptr, i64) #1
87 ; Function Attrs: nounwind readnone
89 ; Function Attrs: nounwind readnone
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 = !{!16, !17, !18}
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, name: "A", file: !1, line: 1, baseType: !4, size: 32, elements: !5)
106 !4 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
108 !6 = !DIEnumerator(name: "AA", value: -1)
109 !7 = !DIEnumerator(name: "AB", value: 0)
110 !8 = !DICompositeType(tag: DW_TAG_enumeration_type, name: "B", file: !1, line: 2, baseType: !9, size: 32, elements: !10)
111 !9 = !DIBasicType(name: "unsigned int", size: 32, encoding: DW_ATE_unsigned)
113 !11 = !DIEnumerator(name: "BA", value: 0, isUnsigned: true)
114 !12 = !DIEnumerator(name: "BB", value: 1, isUnsigned: true)
115 !13 = !DICompositeType(tag: DW_TAG_enumeration_type, file: !1, line: 8, baseType: !9, size: 32, elements: !14)
117 !15 = !DIEnumerator(name: "FIELD_SIGNEDNESS", value: 3, isUnsigned: true)
118 !16 = !{i32 2, !"Dwarf Version", i32 4}
119 !17 = !{i32 2, !"Debug Info Version", i32 3}
120 !18 = !{i32 1, !"wchar_size", i32 4}
121 !19 = !{!"clang version 10.0.0 (https://github.com/llvm/llvm-project.git 4a60741b74384f14b21fdc0131ede326438840ab)"}
122 !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)
123 !21 = !DISubroutineType(types: !22)
125 !23 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !24, size: 64)
126 !24 = distinct !DICompositeType(tag: DW_TAG_union_type, name: "u1", file: !1, line: 7, size: 64, elements: !25)
128 !26 = !DIDerivedType(tag: DW_TAG_member, name: "b1", scope: !24, file: !1, line: 7, baseType: !4, size: 32)
129 !27 = !DIDerivedType(tag: DW_TAG_member, name: "b2", scope: !24, file: !1, line: 7, baseType: !28, size: 64)
130 !28 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "s1", file: !1, line: 6, size: 64, elements: !29)
131 !29 = !{!30, !32, !34}
132 !30 = !DIDerivedType(tag: DW_TAG_member, name: "a1", scope: !28, file: !1, line: 6, baseType: !31, size: 32)
133 !31 = !DIDerivedType(tag: DW_TAG_typedef, name: "__A", file: !1, line: 3, baseType: !3)
134 !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)
135 !33 = !DIDerivedType(tag: DW_TAG_typedef, name: "__B", file: !1, line: 4, baseType: !8)
136 !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)
137 !35 = !DIDerivedType(tag: DW_TAG_typedef, name: "__int", file: !1, line: 5, baseType: !4)
138 !36 = !{!37, !38, !39, !40}
139 !37 = !DILocalVariable(name: "arg", arg: 1, scope: !20, file: !1, line: 9, type: !23)
140 !38 = !DILocalVariable(name: "r1", scope: !20, file: !1, line: 10, type: !9)
141 !39 = !DILocalVariable(name: "r2", scope: !20, file: !1, line: 11, type: !9)
142 !40 = !DILocalVariable(name: "r3", scope: !20, file: !1, line: 12, type: !9)
143 !41 = !DILocation(line: 0, scope: !20)
144 !42 = !DILocation(line: 10, column: 52, scope: !20)
145 !43 = !DILocation(line: 10, column: 55, scope: !20)
146 !44 = !DILocation(line: 10, column: 17, scope: !20)
147 !45 = !DILocation(line: 11, column: 55, scope: !20)
148 !46 = !DILocation(line: 11, column: 17, scope: !20)
149 !47 = !DILocation(line: 12, column: 55, scope: !20)
150 !48 = !DILocation(line: 12, column: 17, scope: !20)
151 !49 = !DILocation(line: 13, column: 13, scope: !20)
152 !50 = !DILocation(line: 13, column: 18, scope: !20)
153 !51 = !DILocation(line: 13, column: 3, scope: !20)