llvm/test/CodeGen/BPF/BTF/extern-builtin.ll

   1 ; RUN: llc -mtriple=bpfel -filetype=asm -o - %s | FileCheck -check-prefixes=CHECK %s
   2 ; RUN: llc -mtriple=bpfeb -filetype=asm -o - %s | FileCheck -check-prefixes=CHECK %s
   3 ; Source code:
   4 ;   unsigned long long load_byte(ptr skb,
   5 ;       unsigned long long off) asm("llvm.bpf.load.byte");
   6 ;   unsigned long long test(ptr skb) {
   7 ;     return load_byte(skb, 10);
   8 ;   }
   9 ; Compilation flag:
  10 ;   clang -target bpf -O2 -g -S -emit-llvm test.c
  11
  12 ; Function Attrs: nounwind readonly
  13 define dso_local i64 @test(ptr readonly %skb) local_unnamed_addr #0 !dbg !13 {
  14 entry:
  15   call void @llvm.dbg.value(metadata ptr %skb, metadata !17, metadata !DIExpression()), !dbg !18
  16   %call = tail call i64 @llvm.bpf.load.byte(ptr %skb, i64 10), !dbg !19
  17   ret i64 %call, !dbg !20
  18 }
  19
  20 ; CHECK:             .section        .BTF,"",@progbits
  21 ; CHECK-NEXT:        .short  60319                   # 0xeb9f
  22 ; CHECK-NEXT:        .byte   1
  23 ; CHECK-NEXT:        .byte   0
  24 ; CHECK-NEXT:        .long   24
  25 ; CHECK-NEXT:        .long   0
  26 ; CHECK-NEXT:        .long   60
  27 ; CHECK-NEXT:        .long   60
  28 ; CHECK-NEXT:        .long   78
  29 ; CHECK-NEXT:        .long   0                       # BTF_KIND_PTR(id = 1)
  30 ; CHECK-NEXT:        .long   33554432                # 0x2000000
  31 ; CHECK-NEXT:        .long   0
  32 ; CHECK-NEXT:        .long   0                       # BTF_KIND_FUNC_PROTO(id = 2)
  33 ; CHECK-NEXT:        .long   218103809               # 0xd000001
  34 ; CHECK-NEXT:        .long   3
  35 ; CHECK-NEXT:        .long   1
  36 ; CHECK-NEXT:        .long   1
  37 ; CHECK-NEXT:        .long   5                       # BTF_KIND_INT(id = 3)
  38 ; CHECK-NEXT:        .long   16777216                # 0x1000000
  39 ; CHECK-NEXT:        .long   8
  40 ; CHECK-NEXT:        .long   64                      # 0x40
  41 ; CHECK-NEXT:        .long   28                      # BTF_KIND_FUNC(id = 4)
  42 ; CHECK-NEXT:        .long   201326593               # 0xc000001
  43 ; CHECK-NEXT:        .long   2
  44 ; CHECK-NEXT:        .byte   0                       # string offset=0
  45 ; CHECK-NEXT:        .ascii  "skb"                   # string offset=1
  46 ; CHECK-NEXT:        .byte   0
  47 ; CHECK-NEXT:        .ascii  "long long unsigned int" # string offset=5
  48 ; CHECK-NEXT:        .byte   0
  49 ; CHECK-NEXT:        .ascii  "test"                  # string offset=28
  50 ; CHECK-NEXT:        .byte   0
  51 ; CHECK-NEXT:        .ascii  ".text"                 # string offset=33
  52 ; CHECK-NEXT:        .byte   0
  53 ; CHECK-NEXT:        .ascii  "/tmp/home/yhs/work/tests/extern/test.c" # string offset=39
  54 ; CHECK-NEXT:        .byte   0
  55
  56 ; Function Attrs: nounwind readonly
  57 declare !dbg !4 i64 @llvm.bpf.load.byte(ptr, i64) #1
  58 ; Function Attrs: nounwind readnone speculatable willreturn
  59 declare void @llvm.dbg.value(metadata, metadata, metadata) #2
  60
  61 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" }
  62 attributes #1 = { nounwind readonly }
  63 attributes #2 = { nounwind readnone speculatable willreturn }
  64
  65 !llvm.dbg.cu = !{!0}
  66 !llvm.module.flags = !{!9, !10, !11}
  67 !llvm.ident = !{!12}
  68
  69 !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)
  70 !1 = !DIFile(filename: "test.c", directory: "/tmp/home/yhs/work/tests/extern")
  71 !2 = !{}
  72 !3 = !{!4}
  73 !4 = !DISubprogram(name: "load_byte", linkageName: "llvm.bpf.load.byte", scope: !1, file: !1, line: 1, type: !5, flags: DIFlagPrototyped, spFlags: DISPFlagOptimized, retainedNodes: !2)
  74 !5 = !DISubroutineType(types: !6)
  75 !6 = !{!7, !8, !7}
  76 !7 = !DIBasicType(name: "long long unsigned int", size: 64, encoding: DW_ATE_unsigned)
  77 !8 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: null, size: 64)
  78 !9 = !{i32 7, !"Dwarf Version", i32 4}
  79 !10 = !{i32 2, !"Debug Info Version", i32 3}
  80 !11 = !{i32 1, !"wchar_size", i32 4}
  81 !12 = !{!"clang version 10.0.0 (https://github.com/llvm/llvm-project.git 907019d835895443b198afcd992c42c9d3478fdf)"}
  82 !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)
  83 !14 = !DISubroutineType(types: !15)
  84 !15 = !{!7, !8}
  85 !16 = !{!17}
  86 !17 = !DILocalVariable(name: "skb", arg: 1, scope: !13, file: !1, line: 3, type: !8)
  87 !18 = !DILocation(line: 0, scope: !13)
  88 !19 = !DILocation(line: 4, column: 10, scope: !13)
  89 !20 = !DILocation(line: 4, column: 3, scope: !13)