125 lines
6.6 KiB
LLVM
125 lines
6.6 KiB
LLVM
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; RUN: opt -O2 %s | llvm-dis > %t1
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; RUN: llc -filetype=asm -o - %t1 | FileCheck -check-prefixes=CHECK,CHECK-EL,CHECK-ALU64 %s
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; RUN: llc -mattr=+alu32 -filetype=asm -o - %t1 | FileCheck -check-prefixes=CHECK,CHECK-EL,CHECK-ALU32 %s
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; Source code:
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; struct s {
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; char f1;
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; char bf1:6,
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; bf2:2,
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; bf3:5,
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; bf4:3;
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; };
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; enum {FIELD_TYPE_OFFSET = 0, FIELD_TYPE_SIZE = 1, FIELD_TYPE_LSHIFT_U64 = 4,};
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; int test(struct s *arg) {
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; return __builtin_preserve_field_info(arg->bf4, FIELD_TYPE_OFFSET) +
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; __builtin_preserve_field_info(arg->bf4, FIELD_TYPE_SIZE) +
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; __builtin_preserve_field_info(arg->bf4, FIELD_TYPE_LSHIFT_U64);
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; }
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; For this case, the IR type has the same starting storage offset for fields
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; bf1, bf1, bf3 and bf4 and the ABI alignment is 1 byte. So for bf4 access,
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; the starting offset has to be at the beginning of field bf3.
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; Compilation flag:
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; clang -target bpfel -O2 -g -S -emit-llvm -Xclang -disable-llvm-passes test.c
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target triple = "bpfel"
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%struct.s = type <{ i8, i16 }>
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; Function Attrs: nounwind readnone
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define dso_local i32 @test(%struct.s* %arg) local_unnamed_addr #0 !dbg !13 {
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entry:
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call void @llvm.dbg.value(metadata %struct.s* %arg, metadata !27, metadata !DIExpression()), !dbg !28
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%0 = tail call i16* @llvm.preserve.struct.access.index.p0i16.p0s_struct.ss(%struct.s* %arg, i32 1, i32 4), !dbg !29, !llvm.preserve.access.index !18
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%1 = tail call i32 @llvm.bpf.preserve.field.info.p0i16(i16* %0, i64 0), !dbg !30
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%2 = tail call i32 @llvm.bpf.preserve.field.info.p0i16(i16* %0, i64 1), !dbg !31
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%add = add i32 %2, %1, !dbg !32
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%3 = tail call i32 @llvm.bpf.preserve.field.info.p0i16(i16* %0, i64 4), !dbg !33
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%add1 = add i32 %add, %3, !dbg !34
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ret i32 %add1, !dbg !35
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}
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; CHECK: r1 = 2
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; CHECK: r0 = 1
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; CHECK-ALU64: r0 += r1
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; CHECK-ALU32: w0 += w1
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; CHECK-EL: r1 = 56
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; CHECK-ALU64: r0 += r1
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; CHECK-ALU32: w0 += w1
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; CHECK: exit
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; CHECK: .long 1 # BTF_KIND_STRUCT(id = 2)
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; CHECK: .byte 115 # string offset=1
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; CHECK: .ascii ".text" # string offset=40
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; CHECK: .ascii "0:4" # string offset=46
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; CHECK: .long 16 # FieldReloc
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; CHECK-NEXT: .long 40 # Field reloc section string offset=40
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; CHECK-NEXT: .long 3
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; CHECK-NEXT: .long .Ltmp{{[0-9]+}}
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; CHECK-NEXT: .long 2
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; CHECK-NEXT: .long 46
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; CHECK-NEXT: .long 0
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; CHECK-NEXT: .long .Ltmp{{[0-9]+}}
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; CHECK-NEXT: .long 2
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; CHECK-NEXT: .long 46
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; CHECK-NEXT: .long 1
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; CHECK-NEXT: .long .Ltmp{{[0-9]+}}
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; CHECK-NEXT: .long 2
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; CHECK-NEXT: .long 46
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; CHECK-NEXT: .long 4
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; Function Attrs: nounwind readnone
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declare i16* @llvm.preserve.struct.access.index.p0i16.p0s_struct.ss(%struct.s*, i32, i32) #1
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; Function Attrs: nounwind readnone
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declare i32 @llvm.bpf.preserve.field.info.p0i16(i16*, i64) #1
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; Function Attrs: nounwind readnone speculatable
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declare void @llvm.dbg.value(metadata, metadata, metadata) #2
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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" }
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attributes #1 = { nounwind readnone }
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attributes #2 = { nounwind readnone speculatable }
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!9, !10, !11}
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!llvm.ident = !{!12}
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!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 10.0.0 (https://github.com/llvm/llvm-project.git 630ca91834ecc06349cb3b4bd2982c1b85b5ad96)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, nameTableKind: None)
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!1 = !DIFile(filename: "test.c", directory: "/tmp/home/yhs/work/tests/core")
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!2 = !{!3}
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!3 = !DICompositeType(tag: DW_TAG_enumeration_type, file: !1, line: 8, baseType: !4, size: 32, elements: !5)
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!4 = !DIBasicType(name: "unsigned int", size: 32, encoding: DW_ATE_unsigned)
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!5 = !{!6, !7, !8}
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!6 = !DIEnumerator(name: "FIELD_TYPE_OFFSET", value: 0, isUnsigned: true)
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!7 = !DIEnumerator(name: "FIELD_TYPE_SIZE", value: 1, isUnsigned: true)
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!8 = !DIEnumerator(name: "FIELD_TYPE_LSHIFT_U64", value: 4, isUnsigned: true)
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!9 = !{i32 2, !"Dwarf Version", i32 4}
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!10 = !{i32 2, !"Debug Info Version", i32 3}
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!11 = !{i32 1, !"wchar_size", i32 4}
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!12 = !{!"clang version 10.0.0 (https://github.com/llvm/llvm-project.git 630ca91834ecc06349cb3b4bd2982c1b85b5ad96)"}
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!13 = distinct !DISubprogram(name: "test", scope: !1, file: !1, line: 9, type: !14, scopeLine: 9, flags: DIFlagPrototyped, isDefinition: true, isOptimized: true, unit: !0, retainedNodes: !26)
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!14 = !DISubroutineType(types: !15)
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!15 = !{!16, !17}
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!16 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
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!17 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !18, size: 64)
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!18 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "s", file: !1, line: 1, size: 24, elements: !19)
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!19 = !{!20, !22, !23, !24, !25}
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!20 = !DIDerivedType(tag: DW_TAG_member, name: "f1", scope: !18, file: !1, line: 2, baseType: !21, size: 8)
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!21 = !DIBasicType(name: "char", size: 8, encoding: DW_ATE_signed_char)
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!22 = !DIDerivedType(tag: DW_TAG_member, name: "bf1", scope: !18, file: !1, line: 3, baseType: !21, size: 6, offset: 8, flags: DIFlagBitField, extraData: i64 8)
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!23 = !DIDerivedType(tag: DW_TAG_member, name: "bf2", scope: !18, file: !1, line: 4, baseType: !21, size: 2, offset: 14, flags: DIFlagBitField, extraData: i64 8)
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!24 = !DIDerivedType(tag: DW_TAG_member, name: "bf3", scope: !18, file: !1, line: 5, baseType: !21, size: 5, offset: 16, flags: DIFlagBitField, extraData: i64 8)
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!25 = !DIDerivedType(tag: DW_TAG_member, name: "bf4", scope: !18, file: !1, line: 6, baseType: !21, size: 3, offset: 21, flags: DIFlagBitField, extraData: i64 8)
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!26 = !{!27}
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!27 = !DILocalVariable(name: "arg", arg: 1, scope: !13, file: !1, line: 9, type: !17)
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!28 = !DILocation(line: 0, scope: !13)
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!29 = !DILocation(line: 10, column: 45, scope: !13)
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!30 = !DILocation(line: 10, column: 10, scope: !13)
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!31 = !DILocation(line: 11, column: 10, scope: !13)
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!32 = !DILocation(line: 10, column: 69, scope: !13)
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!33 = !DILocation(line: 12, column: 10, scope: !13)
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!34 = !DILocation(line: 11, column: 67, scope: !13)
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!35 = !DILocation(line: 10, column: 3, scope: !13)
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