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 { int a1; char a2; } __s1;
6 ; union u1 { int b1; __s1 b2; };
7 ; enum { FIELD_BYTE_SIZE = 1, };
8 ; int test(union u1 *arg) {
9 ; unsigned r1 = __builtin_preserve_field_info(arg->b2, FIELD_BYTE_SIZE);
10 ; unsigned r2 = __builtin_preserve_field_info(arg->b2.a1, FIELD_BYTE_SIZE);
11 ; unsigned r3 = __builtin_preserve_field_info(arg->b2.a2, FIELD_BYTE_SIZE);
12 ; /* r1: 8, r2: 4, r3: 1 */
13 ; return r1 + r2 + r3;
16 ; clang -target bpf -O2 -g -S -emit-llvm -Xclang -disable-llvm-passes test.c
20 %union.u1 = type { %struct.s1 }
21 %struct.s1 = type { i32, i8 }
23 ; Function Attrs: nounwind readnone
24 define dso_local i32 @test(ptr %arg) local_unnamed_addr #0 !dbg !11 {
26 call void @llvm.dbg.value(metadata ptr %arg, metadata !27, metadata !DIExpression()), !dbg !31
27 %0 = tail call ptr @llvm.preserve.union.access.index.p0.u1s.p0.u1s(ptr %arg, i32 1), !dbg !32, !llvm.preserve.access.index !16
28 %1 = tail call i32 @llvm.bpf.preserve.field.info.p0.s1s(ptr %0, i64 1), !dbg !33
29 call void @llvm.dbg.value(metadata i32 %1, metadata !28, metadata !DIExpression()), !dbg !31
30 %2 = tail call ptr @llvm.preserve.struct.access.index.p0.p0.s1s(ptr elementtype(%struct.s1) %0, i32 0, i32 0), !dbg !34, !llvm.preserve.access.index !21
31 %3 = tail call i32 @llvm.bpf.preserve.field.info.p0(ptr %2, i64 1), !dbg !35
32 call void @llvm.dbg.value(metadata i32 %3, metadata !29, metadata !DIExpression()), !dbg !31
33 %4 = tail call ptr @llvm.preserve.struct.access.index.p0.p0.s1s(ptr elementtype(%struct.s1) %0, i32 1, i32 1), !dbg !36, !llvm.preserve.access.index !21
34 %5 = tail call i32 @llvm.bpf.preserve.field.info.p0(ptr %4, i64 1), !dbg !37
35 call void @llvm.dbg.value(metadata i32 %5, metadata !30, metadata !DIExpression()), !dbg !31
36 %add = add i32 %3, %1, !dbg !38
37 %add3 = add i32 %add, %5, !dbg !39
38 ret i32 %add3, !dbg !40
43 ; CHECK-ALU64: r0 += r1
44 ; CHECK-ALU32: w0 += w1
46 ; CHECK-ALU64: r0 += r1
47 ; CHECK-ALU32: w0 += w1
50 ; CHECK: .long 1 # BTF_KIND_UNION(id = 2)
51 ; CHECK: .ascii "u1" # string offset=1
52 ; CHECK: .ascii ".text" # string offset=42
53 ; CHECK: .ascii "0:1" # string offset=48
54 ; CHECK: .ascii "0:1:0" # string offset=89
55 ; CHECK: .ascii "0:1:1" # string offset=95
57 ; CHECK: .long 16 # FieldReloc
58 ; CHECK-NEXT: .long 42 # Field reloc section string offset=42
60 ; CHECK-NEXT: .long .Ltmp{{[0-9]+}}
62 ; CHECK-NEXT: .long 48
64 ; CHECK-NEXT: .long .Ltmp{{[0-9]+}}
66 ; CHECK-NEXT: .long 89
68 ; CHECK-NEXT: .long .Ltmp{{[0-9]+}}
70 ; CHECK-NEXT: .long 95
73 ; Function Attrs: nounwind readnone
74 declare ptr @llvm.preserve.union.access.index.p0.u1s.p0.u1s(ptr, i32) #1
76 ; Function Attrs: nounwind readnone
77 declare i32 @llvm.bpf.preserve.field.info.p0.s1s(ptr, i64) #1
79 ; Function Attrs: nounwind readnone
80 declare ptr @llvm.preserve.struct.access.index.p0.p0.s1s(ptr, i32, i32) #1
82 ; Function Attrs: nounwind readnone
83 declare i32 @llvm.bpf.preserve.field.info.p0(ptr, i64) #1
85 ; Function Attrs: nounwind readnone
87 ; Function Attrs: nounwind readnone
89 ; Function Attrs: nounwind readnone speculatable willreturn
90 declare void @llvm.dbg.value(metadata, metadata, metadata) #2
92 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" }
93 attributes #1 = { nounwind readnone }
94 attributes #2 = { nounwind readnone speculatable willreturn }
97 !llvm.module.flags = !{!7, !8, !9}
100 !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)
101 !1 = !DIFile(filename: "test.c", directory: "/tmp/home/yhs/work/tests/core")
103 !3 = !DICompositeType(tag: DW_TAG_enumeration_type, file: !1, line: 3, baseType: !4, size: 32, elements: !5)
104 !4 = !DIBasicType(name: "unsigned int", size: 32, encoding: DW_ATE_unsigned)
106 !6 = !DIEnumerator(name: "FIELD_BYTE_SIZE", value: 1, isUnsigned: true)
107 !7 = !{i32 2, !"Dwarf Version", i32 4}
108 !8 = !{i32 2, !"Debug Info Version", i32 3}
109 !9 = !{i32 1, !"wchar_size", i32 4}
110 !10 = !{!"clang version 10.0.0 (https://github.com/llvm/llvm-project.git 4a60741b74384f14b21fdc0131ede326438840ab)"}
111 !11 = distinct !DISubprogram(name: "test", scope: !1, file: !1, line: 4, type: !12, scopeLine: 4, flags: DIFlagPrototyped, isDefinition: true, isOptimized: true, unit: !0, retainedNodes: !26)
112 !12 = !DISubroutineType(types: !13)
114 !14 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
115 !15 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !16, size: 64)
116 !16 = distinct !DICompositeType(tag: DW_TAG_union_type, name: "u1", file: !1, line: 2, size: 64, elements: !17)
118 !18 = !DIDerivedType(tag: DW_TAG_member, name: "b1", scope: !16, file: !1, line: 2, baseType: !14, size: 32)
119 !19 = !DIDerivedType(tag: DW_TAG_member, name: "b2", scope: !16, file: !1, line: 2, baseType: !20, size: 64)
120 !20 = !DIDerivedType(tag: DW_TAG_typedef, name: "__s1", file: !1, line: 1, baseType: !21)
121 !21 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "s1", file: !1, line: 1, size: 64, elements: !22)
123 !23 = !DIDerivedType(tag: DW_TAG_member, name: "a1", scope: !21, file: !1, line: 1, baseType: !14, size: 32)
124 !24 = !DIDerivedType(tag: DW_TAG_member, name: "a2", scope: !21, file: !1, line: 1, baseType: !25, size: 8, offset: 32)
125 !25 = !DIBasicType(name: "char", size: 8, encoding: DW_ATE_signed_char)
126 !26 = !{!27, !28, !29, !30}
127 !27 = !DILocalVariable(name: "arg", arg: 1, scope: !11, file: !1, line: 4, type: !15)
128 !28 = !DILocalVariable(name: "r1", scope: !11, file: !1, line: 5, type: !4)
129 !29 = !DILocalVariable(name: "r2", scope: !11, file: !1, line: 6, type: !4)
130 !30 = !DILocalVariable(name: "r3", scope: !11, file: !1, line: 7, type: !4)
131 !31 = !DILocation(line: 0, scope: !11)
132 !32 = !DILocation(line: 5, column: 52, scope: !11)
133 !33 = !DILocation(line: 5, column: 17, scope: !11)
134 !34 = !DILocation(line: 6, column: 55, scope: !11)
135 !35 = !DILocation(line: 6, column: 17, scope: !11)
136 !36 = !DILocation(line: 7, column: 55, scope: !11)
137 !37 = !DILocation(line: 7, column: 17, scope: !11)
138 !38 = !DILocation(line: 9, column: 13, scope: !11)
139 !39 = !DILocation(line: 9, column: 18, scope: !11)
140 !40 = !DILocation(line: 9, column: 3, scope: !11)