1 ; RUN: opt -O2 %s | llvm-dis > %t1
2 ; RUN: llc -filetype=asm -o - %t1 | FileCheck -check-prefixes=CHECK %s
3 ; RUN: llc -mattr=+alu32 -filetype=asm -o - %t1 | FileCheck -check-prefixes=CHECK %s
5 ; typedef struct s1 { int a1; int a2:4; int a3;} __s1;
6 ; enum { FIELD_BYTE_SIZE = 1, };
7 ; int test(__s1 *arg) {
8 ; return __builtin_preserve_field_info(arg->a2, FIELD_BYTE_SIZE);
11 ; clang -target bpf -O2 -g -S -emit-llvm -Xclang -disable-llvm-passes test.c
15 %struct.s1 = type { i32, i8, i32 }
17 ; Function Attrs: nounwind readnone
18 define dso_local i32 @test(ptr readnone %arg) local_unnamed_addr #0 !dbg !11 {
20 call void @llvm.dbg.value(metadata ptr %arg, metadata !23, metadata !DIExpression()), !dbg !24
21 %0 = tail call ptr @llvm.preserve.struct.access.index.p0.p0.s1s(ptr elementtype(%struct.s1) %arg, i32 1, i32 1), !dbg !25, !llvm.preserve.access.index !17
22 %1 = tail call i32 @llvm.bpf.preserve.field.info.p0(ptr %0, i64 1), !dbg !26
29 ; CHECK: .long 6 # BTF_KIND_STRUCT(id = 3)
31 ; CHECK: .ascii "s1" # string offset=6
32 ; CHECK: .ascii ".text" # string offset=31
33 ; CHECK: .ascii "0:1" # string offset=37
35 ; CHECK: .long 16 # FieldReloc
36 ; CHECK-NEXT: .long 31 # Field reloc section string offset=31
38 ; CHECK-NEXT: .long .Ltmp{{[0-9]+}}
40 ; CHECK-NEXT: .long 37
43 ; Function Attrs: nounwind readnone
44 declare ptr @llvm.preserve.struct.access.index.p0.p0.s1s(ptr, i32, i32) #1
46 ; Function Attrs: nounwind readnone
47 declare i32 @llvm.bpf.preserve.field.info.p0(ptr, i64) #1
49 ; Function Attrs: nounwind readnone speculatable
50 declare void @llvm.dbg.value(metadata, metadata, metadata) #2
52 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" }
53 attributes #1 = { nounwind readnone }
54 attributes #2 = { nounwind readnone speculatable }
57 !llvm.module.flags = !{!7, !8, !9}
60 !0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 10.0.0 (https://github.com/llvm/llvm-project.git 6c63b5d6a1cb84a75807804337c855a41c976260)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, nameTableKind: None)
61 !1 = !DIFile(filename: "test.c", directory: "/tmp/home/yhs/work/tests/core")
63 !3 = !DICompositeType(tag: DW_TAG_enumeration_type, file: !1, line: 2, baseType: !4, size: 32, elements: !5)
64 !4 = !DIBasicType(name: "unsigned int", size: 32, encoding: DW_ATE_unsigned)
66 !6 = !DIEnumerator(name: "FIELD_BYTE_SIZE", value: 1, isUnsigned: true)
67 !7 = !{i32 2, !"Dwarf Version", i32 4}
68 !8 = !{i32 2, !"Debug Info Version", i32 3}
69 !9 = !{i32 1, !"wchar_size", i32 4}
70 !10 = !{!"clang version 10.0.0 (https://github.com/llvm/llvm-project.git 6c63b5d6a1cb84a75807804337c855a41c976260)"}
71 !11 = distinct !DISubprogram(name: "test", scope: !1, file: !1, line: 3, type: !12, scopeLine: 3, flags: DIFlagPrototyped, isDefinition: true, isOptimized: true, unit: !0, retainedNodes: !22)
72 !12 = !DISubroutineType(types: !13)
74 !14 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
75 !15 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !16, size: 64)
76 !16 = !DIDerivedType(tag: DW_TAG_typedef, name: "__s1", file: !1, line: 1, baseType: !17)
77 !17 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "s1", file: !1, line: 1, size: 96, elements: !18)
78 !18 = !{!19, !20, !21}
79 !19 = !DIDerivedType(tag: DW_TAG_member, name: "a1", scope: !17, file: !1, line: 1, baseType: !14, size: 32)
80 !20 = !DIDerivedType(tag: DW_TAG_member, name: "a2", scope: !17, file: !1, line: 1, baseType: !14, size: 4, offset: 32, flags: DIFlagBitField, extraData: i64 32)
81 !21 = !DIDerivedType(tag: DW_TAG_member, name: "a3", scope: !17, file: !1, line: 1, baseType: !14, size: 32, offset: 64)
83 !23 = !DILocalVariable(name: "arg", arg: 1, scope: !11, file: !1, line: 3, type: !15)
84 !24 = !DILocation(line: 0, scope: !11)
85 !25 = !DILocation(line: 4, column: 45, scope: !11)
86 !26 = !DILocation(line: 4, column: 10, scope: !11)
87 !27 = !DILocation(line: 4, column: 3, scope: !11)