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 struct s1 { char a1 [5][5]; } __s1;
6 ; union u1 { int b1; __s1 b2; };
7 ; enum { FIELD_RSHIFT_U64 = 5, };
8 ; int test(union u1 *arg) {
9 ; unsigned r1 = __builtin_preserve_field_info(arg->b2.a1[3], FIELD_RSHIFT_U64);
10 ; unsigned r2 = __builtin_preserve_field_info(arg->b2.a1[3][3], FIELD_RSHIFT_U64);
11 ; /* r1 : 24, r2 : 56 */
15 ; clang -target bpf -O2 -g -S -emit-llvm -Xclang -disable-llvm-passes test.c
19 %union.u1 = type { i32, [24 x i8] }
20 %struct.s1 = type { [5 x [5 x i8]] }
22 ; Function Attrs: nounwind readnone
23 define dso_local i32 @test(ptr %arg) local_unnamed_addr #0 !dbg !18 {
25 call void @llvm.dbg.value(metadata ptr %arg, metadata !32, metadata !DIExpression()), !dbg !35
26 %0 = tail call ptr @llvm.preserve.union.access.index.p0.u1s.p0.u1s(ptr %arg, i32 1), !dbg !36, !llvm.preserve.access.index !23
27 %1 = tail call ptr @llvm.preserve.struct.access.index.p0.p0.s1s(ptr elementtype(%struct.s1) %0, i32 0, i32 0), !dbg !37, !llvm.preserve.access.index !28
28 %2 = tail call ptr @llvm.preserve.array.access.index.p0.p0(ptr elementtype([5 x [5 x i8]]) %1, i32 1, i32 3), !dbg !38, !llvm.preserve.access.index !8
29 %3 = tail call i32 @llvm.bpf.preserve.field.info.p0(ptr %2, i64 5), !dbg !39
30 call void @llvm.dbg.value(metadata i32 %3, metadata !33, metadata !DIExpression()), !dbg !35
31 %4 = tail call ptr @llvm.preserve.array.access.index.p0.p0(ptr elementtype([5 x i8]) %2, i32 1, i32 3), !dbg !40, !llvm.preserve.access.index !12
32 %5 = tail call i32 @llvm.bpf.preserve.field.info.p0(ptr %4, i64 5), !dbg !41
33 call void @llvm.dbg.value(metadata i32 %5, metadata !34, metadata !DIExpression()), !dbg !35
34 %add = add i32 %5, %3, !dbg !42
35 ret i32 %add, !dbg !43
40 ; CHECK-ALU64: r0 += r1
41 ; CHECK-ALU32: w0 += w1
44 ; CHECK: .long 1 # BTF_KIND_UNION(id = 2)
45 ; CHECK: .ascii "u1" # string offset=1
46 ; CHECK: .ascii ".text" # string offset=59
47 ; CHECK: .ascii "0:1:0:3" # string offset=65
48 ; CHECK: .ascii "0:1:0:3:3" # string offset=110
50 ; CHECK: .long 16 # FieldReloc
51 ; CHECK-NEXT: .long 59 # Field reloc section string offset=59
53 ; CHECK-NEXT: .long .Ltmp{{[0-9]+}}
55 ; CHECK-NEXT: .long 65
57 ; CHECK-NEXT: .long .Ltmp{{[0-9]+}}
59 ; CHECK-NEXT: .long 110
62 ; Function Attrs: nounwind readnone
63 declare ptr @llvm.preserve.union.access.index.p0.u1s.p0.u1s(ptr, i32) #1
65 ; Function Attrs: nounwind readnone
66 declare ptr @llvm.preserve.struct.access.index.p0.p0.s1s(ptr, i32, i32) #1
68 ; Function Attrs: nounwind readnone
69 declare ptr @llvm.preserve.array.access.index.p0.p0(ptr, i32, i32) #1
71 ; Function Attrs: nounwind readnone
72 declare i32 @llvm.bpf.preserve.field.info.p0(ptr, i64) #1
74 ; Function Attrs: nounwind readnone
76 ; Function Attrs: nounwind readnone
78 ; Function Attrs: nounwind readnone speculatable willreturn
79 declare void @llvm.dbg.value(metadata, metadata, metadata) #2
81 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" }
82 attributes #1 = { nounwind readnone }
83 attributes #2 = { nounwind readnone speculatable willreturn }
86 !llvm.module.flags = !{!14, !15, !16}
89 !0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 10.0.0 (https://github.com/llvm/llvm-project.git c1e02f16f1105ffaf1c35ee8bc38b7d6db5c6ea9)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, retainedTypes: !7, nameTableKind: None)
90 !1 = !DIFile(filename: "test.c", directory: "/tmp/home/yhs/work/tests/core")
92 !3 = !DICompositeType(tag: DW_TAG_enumeration_type, file: !1, line: 3, baseType: !4, size: 32, elements: !5)
93 !4 = !DIBasicType(name: "unsigned int", size: 32, encoding: DW_ATE_unsigned)
95 !6 = !DIEnumerator(name: "FIELD_RSHIFT_U64", value: 5, isUnsigned: true)
97 !8 = !DICompositeType(tag: DW_TAG_array_type, baseType: !9, size: 200, elements: !10)
98 !9 = !DIBasicType(name: "char", size: 8, encoding: DW_ATE_signed_char)
100 !11 = !DISubrange(count: 5)
101 !12 = !DICompositeType(tag: DW_TAG_array_type, baseType: !9, size: 40, elements: !13)
103 !14 = !{i32 2, !"Dwarf Version", i32 4}
104 !15 = !{i32 2, !"Debug Info Version", i32 3}
105 !16 = !{i32 1, !"wchar_size", i32 4}
106 !17 = !{!"clang version 10.0.0 (https://github.com/llvm/llvm-project.git c1e02f16f1105ffaf1c35ee8bc38b7d6db5c6ea9)"}
107 !18 = distinct !DISubprogram(name: "test", scope: !1, file: !1, line: 4, type: !19, scopeLine: 4, flags: DIFlagPrototyped, isDefinition: true, isOptimized: true, unit: !0, retainedNodes: !31)
108 !19 = !DISubroutineType(types: !20)
110 !21 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
111 !22 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !23, size: 64)
112 !23 = distinct !DICompositeType(tag: DW_TAG_union_type, name: "u1", file: !1, line: 2, size: 224, elements: !24)
114 !25 = !DIDerivedType(tag: DW_TAG_member, name: "b1", scope: !23, file: !1, line: 2, baseType: !21, size: 32)
115 !26 = !DIDerivedType(tag: DW_TAG_member, name: "b2", scope: !23, file: !1, line: 2, baseType: !27, size: 200)
116 !27 = !DIDerivedType(tag: DW_TAG_typedef, name: "__s1", file: !1, line: 1, baseType: !28)
117 !28 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "s1", file: !1, line: 1, size: 200, elements: !29)
119 !30 = !DIDerivedType(tag: DW_TAG_member, name: "a1", scope: !28, file: !1, line: 1, baseType: !8, size: 200)
120 !31 = !{!32, !33, !34}
121 !32 = !DILocalVariable(name: "arg", arg: 1, scope: !18, file: !1, line: 4, type: !22)
122 !33 = !DILocalVariable(name: "r1", scope: !18, file: !1, line: 5, type: !4)
123 !34 = !DILocalVariable(name: "r2", scope: !18, file: !1, line: 6, type: !4)
124 !35 = !DILocation(line: 0, scope: !18)
125 !36 = !DILocation(line: 5, column: 52, scope: !18)
126 !37 = !DILocation(line: 5, column: 55, scope: !18)
127 !38 = !DILocation(line: 5, column: 47, scope: !18)
128 !39 = !DILocation(line: 5, column: 17, scope: !18)
129 !40 = !DILocation(line: 6, column: 47, scope: !18)
130 !41 = !DILocation(line: 6, column: 17, scope: !18)
131 !42 = !DILocation(line: 8, column: 13, scope: !18)
132 !43 = !DILocation(line: 8, column: 3, scope: !18)