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 ; typedef unsigned __uint;
6 ; struct s1 { int a1; __uint a2:9; __uint a3:4; };
7 ; union u1 { int b1; struct s1 b2; };
8 ; enum { FIELD_EXISTENCE = 2, };
9 ; int test(union u1 *arg) {
10 ; unsigned r1 = __builtin_preserve_field_info(arg->b2.a1, FIELD_EXISTENCE);
11 ; unsigned r2 = __builtin_preserve_field_info(arg->b2.a3, FIELD_EXISTENCE);
15 ; clang -target bpf -O2 -g -S -emit-llvm -Xclang -disable-llvm-passes test.c
19 %union.u1 = type { %struct.s1 }
20 %struct.s1 = type { i32, i16 }
22 ; Function Attrs: nounwind readnone
23 define dso_local i32 @test(ptr %arg) local_unnamed_addr #0 !dbg !11 {
25 call void @llvm.dbg.value(metadata ptr %arg, metadata !27, metadata !DIExpression()), !dbg !30
26 %0 = tail call ptr @llvm.preserve.union.access.index.p0.u1s.p0.u1s(ptr %arg, i32 1), !dbg !31, !llvm.preserve.access.index !16
27 %1 = tail call ptr @llvm.preserve.struct.access.index.p0.p0.s1s(ptr elementtype(%struct.s1) %0, i32 0, i32 0), !dbg !32, !llvm.preserve.access.index !20
28 %2 = tail call i32 @llvm.bpf.preserve.field.info.p0(ptr %1, i64 2), !dbg !33
29 call void @llvm.dbg.value(metadata i32 %2, metadata !28, metadata !DIExpression()), !dbg !30
30 %3 = tail call ptr @llvm.preserve.struct.access.index.p0.p0.s1s(ptr elementtype(%struct.s1) %0, i32 1, i32 2), !dbg !34, !llvm.preserve.access.index !20
31 %4 = tail call i32 @llvm.bpf.preserve.field.info.p0(ptr %3, i64 2), !dbg !35
32 call void @llvm.dbg.value(metadata i32 %4, metadata !29, metadata !DIExpression()), !dbg !30
33 %add = add i32 %4, %2, !dbg !36
34 ret i32 %add, !dbg !37
39 ; CHECK-ALU64: r0 += r1
40 ; CHECK-ALU32: w0 += w1
43 ; CHECK: .long 1 # BTF_KIND_UNION(id = 2)
44 ; CHECK: .ascii "u1" # string offset=1
45 ; CHECK: .ascii ".text" # string offset=55
46 ; CHECK: .ascii "0:1:0" # string offset=61
47 ; CHECK: .ascii "0:1:2" # string offset=104
49 ; CHECK: .long 16 # FieldReloc
50 ; CHECK-NEXT: .long 55 # Field reloc section string offset=55
52 ; CHECK-NEXT: .long .Ltmp{{[0-9]+}}
54 ; CHECK-NEXT: .long 61
56 ; CHECK-NEXT: .long .Ltmp{{[0-9]+}}
58 ; CHECK-NEXT: .long 104
61 ; Function Attrs: nounwind readnone
62 declare ptr @llvm.preserve.union.access.index.p0.u1s.p0.u1s(ptr, i32) #1
64 ; Function Attrs: nounwind readnone
65 declare ptr @llvm.preserve.struct.access.index.p0.p0.s1s(ptr, i32, i32) #1
67 ; Function Attrs: nounwind readnone
68 declare i32 @llvm.bpf.preserve.field.info.p0(ptr, i64) #1
70 ; Function Attrs: nounwind readnone
72 ; Function Attrs: nounwind readnone
74 ; Function Attrs: nounwind readnone speculatable willreturn
75 declare void @llvm.dbg.value(metadata, metadata, metadata) #2
77 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" }
78 attributes #1 = { nounwind readnone }
79 attributes #2 = { nounwind readnone speculatable willreturn }
82 !llvm.module.flags = !{!7, !8, !9}
85 !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)
86 !1 = !DIFile(filename: "test.c", directory: "/tmp/home/yhs/work/tests/core")
88 !3 = !DICompositeType(tag: DW_TAG_enumeration_type, file: !1, line: 4, baseType: !4, size: 32, elements: !5)
89 !4 = !DIBasicType(name: "unsigned int", size: 32, encoding: DW_ATE_unsigned)
91 !6 = !DIEnumerator(name: "FIELD_EXISTENCE", value: 2, isUnsigned: true)
92 !7 = !{i32 2, !"Dwarf Version", i32 4}
93 !8 = !{i32 2, !"Debug Info Version", i32 3}
94 !9 = !{i32 1, !"wchar_size", i32 4}
95 !10 = !{!"clang version 10.0.0 (https://github.com/llvm/llvm-project.git 4a60741b74384f14b21fdc0131ede326438840ab)"}
96 !11 = distinct !DISubprogram(name: "test", scope: !1, file: !1, line: 5, type: !12, scopeLine: 5, flags: DIFlagPrototyped, isDefinition: true, isOptimized: true, unit: !0, retainedNodes: !26)
97 !12 = !DISubroutineType(types: !13)
99 !14 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
100 !15 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !16, size: 64)
101 !16 = distinct !DICompositeType(tag: DW_TAG_union_type, name: "u1", file: !1, line: 3, size: 64, elements: !17)
103 !18 = !DIDerivedType(tag: DW_TAG_member, name: "b1", scope: !16, file: !1, line: 3, baseType: !14, size: 32)
104 !19 = !DIDerivedType(tag: DW_TAG_member, name: "b2", scope: !16, file: !1, line: 3, baseType: !20, size: 64)
105 !20 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "s1", file: !1, line: 2, size: 64, elements: !21)
106 !21 = !{!22, !23, !25}
107 !22 = !DIDerivedType(tag: DW_TAG_member, name: "a1", scope: !20, file: !1, line: 2, baseType: !14, size: 32)
108 !23 = !DIDerivedType(tag: DW_TAG_member, name: "a2", scope: !20, file: !1, line: 2, baseType: !24, size: 9, offset: 32, flags: DIFlagBitField, extraData: i64 32)
109 !24 = !DIDerivedType(tag: DW_TAG_typedef, name: "__uint", file: !1, line: 1, baseType: !4)
110 !25 = !DIDerivedType(tag: DW_TAG_member, name: "a3", scope: !20, file: !1, line: 2, baseType: !24, size: 4, offset: 41, flags: DIFlagBitField, extraData: i64 32)
111 !26 = !{!27, !28, !29}
112 !27 = !DILocalVariable(name: "arg", arg: 1, scope: !11, file: !1, line: 5, type: !15)
113 !28 = !DILocalVariable(name: "r1", scope: !11, file: !1, line: 6, type: !4)
114 !29 = !DILocalVariable(name: "r2", scope: !11, file: !1, line: 7, type: !4)
115 !30 = !DILocation(line: 0, scope: !11)
116 !31 = !DILocation(line: 6, column: 52, scope: !11)
117 !32 = !DILocation(line: 6, column: 55, scope: !11)
118 !33 = !DILocation(line: 6, column: 17, scope: !11)
119 !34 = !DILocation(line: 7, column: 55, scope: !11)
120 !35 = !DILocation(line: 7, column: 17, scope: !11)
121 !36 = !DILocation(line: 8, column: 13, scope: !11)
122 !37 = !DILocation(line: 8, column: 3, scope: !11)