90 lines
4.8 KiB
LLVM
90 lines
4.8 KiB
LLVM
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; RUN: llc -march=bpfel -filetype=asm -o - %s | FileCheck -check-prefixes=CHECK %s
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; RUN: llc -march=bpfeb -filetype=asm -o - %s | FileCheck -check-prefixes=CHECK %s
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; Source code:
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; unsigned long long load_byte(void *skb,
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; unsigned long long off) asm("llvm.bpf.load.byte");
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; unsigned long long test(void *skb) {
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; return load_byte(skb, 10);
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; }
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; Compilation flag:
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; clang -target bpf -O2 -g -S -emit-llvm test.c
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; Function Attrs: nounwind readonly
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define dso_local i64 @test(i8* readonly %skb) local_unnamed_addr #0 !dbg !13 {
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entry:
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call void @llvm.dbg.value(metadata i8* %skb, metadata !17, metadata !DIExpression()), !dbg !18
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%call = tail call i64 @llvm.bpf.load.byte(i8* %skb, i64 10), !dbg !19
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ret i64 %call, !dbg !20
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}
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; CHECK: .section .BTF,"",@progbits
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; CHECK-NEXT: .short 60319 # 0xeb9f
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; CHECK-NEXT: .byte 1
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; CHECK-NEXT: .byte 0
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; CHECK-NEXT: .long 24
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; CHECK-NEXT: .long 0
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; CHECK-NEXT: .long 60
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; CHECK-NEXT: .long 60
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; CHECK-NEXT: .long 78
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; CHECK-NEXT: .long 0 # BTF_KIND_PTR(id = 1)
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; CHECK-NEXT: .long 33554432 # 0x2000000
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; CHECK-NEXT: .long 0
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; CHECK-NEXT: .long 0 # BTF_KIND_FUNC_PROTO(id = 2)
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; CHECK-NEXT: .long 218103809 # 0xd000001
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; CHECK-NEXT: .long 3
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; CHECK-NEXT: .long 1
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; CHECK-NEXT: .long 1
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; CHECK-NEXT: .long 5 # BTF_KIND_INT(id = 3)
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; CHECK-NEXT: .long 16777216 # 0x1000000
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; CHECK-NEXT: .long 8
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; CHECK-NEXT: .long 64 # 0x40
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; CHECK-NEXT: .long 28 # BTF_KIND_FUNC(id = 4)
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; CHECK-NEXT: .long 201326593 # 0xc000001
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; CHECK-NEXT: .long 2
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; CHECK-NEXT: .byte 0 # string offset=0
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; CHECK-NEXT: .ascii "skb" # string offset=1
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; CHECK-NEXT: .byte 0
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; CHECK-NEXT: .ascii "long long unsigned int" # string offset=5
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; CHECK-NEXT: .byte 0
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; CHECK-NEXT: .ascii "test" # string offset=28
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; CHECK-NEXT: .byte 0
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; CHECK-NEXT: .ascii ".text" # string offset=33
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; CHECK-NEXT: .byte 0
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; CHECK-NEXT: .ascii "/tmp/home/yhs/work/tests/extern/test.c" # string offset=39
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; CHECK-NEXT: .byte 0
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; Function Attrs: nounwind readonly
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declare !dbg !4 i64 @llvm.bpf.load.byte(i8*, i64) #1
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; Function Attrs: nounwind readnone speculatable willreturn
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declare void @llvm.dbg.value(metadata, metadata, metadata) #2
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attributes #0 = { nounwind readonly "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 readonly }
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attributes #2 = { nounwind readnone speculatable willreturn }
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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 907019d835895443b198afcd992c42c9d3478fdf)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, retainedTypes: !3, splitDebugInlining: false, nameTableKind: None)
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!1 = !DIFile(filename: "test.c", directory: "/tmp/home/yhs/work/tests/extern")
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!2 = !{}
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!3 = !{!4}
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!4 = !DISubprogram(name: "load_byte", linkageName: "llvm.bpf.load.byte", scope: !1, file: !1, line: 1, type: !5, flags: DIFlagPrototyped, spFlags: DISPFlagOptimized, retainedNodes: !2)
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!5 = !DISubroutineType(types: !6)
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!6 = !{!7, !8, !7}
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!7 = !DIBasicType(name: "long long unsigned int", size: 64, encoding: DW_ATE_unsigned)
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!8 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: null, size: 64)
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!9 = !{i32 7, !"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 907019d835895443b198afcd992c42c9d3478fdf)"}
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!13 = distinct !DISubprogram(name: "test", scope: !1, file: !1, line: 3, type: !14, scopeLine: 3, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !16)
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!14 = !DISubroutineType(types: !15)
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!15 = !{!7, !8}
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!16 = !{!17}
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!17 = !DILocalVariable(name: "skb", arg: 1, scope: !13, file: !1, line: 3, type: !8)
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!18 = !DILocation(line: 0, scope: !13)
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!19 = !DILocation(line: 4, column: 10, scope: !13)
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!20 = !DILocation(line: 4, column: 3, scope: !13)
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