llvm/test/CodeGen/BPF/BTF/extern-var-func-weak.ll

   1 ; RUN: llc -march=bpfel -filetype=asm -o - %s | FileCheck -check-prefixes=CHECK %s
   2 ; RUN: llc -march=bpfeb -filetype=asm -o - %s | FileCheck -check-prefixes=CHECK %s
   3 ;
   4 ; Source code:
   5 ;   extern int global_func(char c) __attribute__((weak));
   6 ;   int test() {
   7 ;     return global_func(0);
   8 ;   }
   9 ; Compilation flag:
  10 ;   clang -target bpf -O2 -g -S -emit-llvm test.c
  11
  12 ; Function Attrs: nounwind
  13 define dso_local i32 @test() local_unnamed_addr #0 !dbg !13 {
  14 entry:
  15   %call = tail call i32 @global_func(i8 signext 0) #2, !dbg !16
  16   ret i32 %call, !dbg !17
  17 }
  18 declare !dbg !4 extern_weak dso_local i32 @global_func(i8 signext) local_unnamed_addr #1
  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   88
  27 ; CHECK-NEXT:        .long   88
  28 ; CHECK-NEXT:        .long   72
  29 ; CHECK-NEXT:        .long   0                       # BTF_KIND_FUNC_PROTO(id = 1)
  30 ; CHECK-NEXT:        .long   218103808               # 0xd000000
  31 ; CHECK-NEXT:        .long   2
  32 ; CHECK-NEXT:        .long   1                       # BTF_KIND_INT(id = 2)
  33 ; CHECK-NEXT:        .long   16777216                # 0x1000000
  34 ; CHECK-NEXT:        .long   4
  35 ; CHECK-NEXT:        .long   16777248                # 0x1000020
  36 ; CHECK-NEXT:        .long   5                       # BTF_KIND_FUNC(id = 3)
  37 ; CHECK-NEXT:        .long   201326593               # 0xc000001
  38 ; CHECK-NEXT:        .long   1
  39 ; CHECK-NEXT:        .long   0                       # BTF_KIND_FUNC_PROTO(id = 4)
  40 ; CHECK-NEXT:        .long   218103809               # 0xd000001
  41 ; CHECK-NEXT:        .long   2
  42 ; CHECK-NEXT:        .long   0
  43 ; CHECK-NEXT:        .long   5
  44 ; CHECK-NEXT:        .long   55                      # BTF_KIND_INT(id = 5)
  45 ; CHECK-NEXT:        .long   16777216                # 0x1000000
  46 ; CHECK-NEXT:        .long   1
  47 ; CHECK-NEXT:        .long   16777224                # 0x1000008
  48 ; CHECK-NEXT:        .long   60                      # BTF_KIND_FUNC(id = 6)
  49 ; CHECK-NEXT:        .long   201326594               # 0xc000002
  50 ; CHECK-NEXT:        .long   4
  51 ; CHECK-NEXT:        .byte   0                       # string offset=0
  52 ; CHECK-NEXT:        .ascii  "int"                   # string offset=1
  53 ; CHECK-NEXT:        .byte   0
  54 ; CHECK-NEXT:        .ascii  "test"                  # string offset=5
  55 ; CHECK-NEXT:        .byte   0
  56 ; CHECK-NEXT:        .ascii  ".text"                 # string offset=10
  57 ; CHECK-NEXT:        .byte   0
  58 ; CHECK-NEXT:        .ascii  "/tmp/home/yhs/work/tests/extern/test.c" # string offset=16
  59 ; CHECK-NEXT:        .byte   0
  60 ; CHECK-NEXT:        .ascii  "char"                  # string offset=55
  61 ; CHECK-NEXT:        .byte   0
  62 ; CHECK-NEXT:        .ascii  "global_func"           # string offset=60
  63 ; CHECK-NEXT:        .byte   0
  64
  65 attributes #0 = { nounwind "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" }
  66 attributes #1 = { "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "frame-pointer"="all" "less-precise-fpmad"="false" "no-infs-fp-math"="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" }
  67 attributes #2 = { nounwind }
  68
  69 !llvm.dbg.cu = !{!0}
  70 !llvm.module.flags = !{!9, !10, !11}
  71 !llvm.ident = !{!12}
  72
  73 !0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 10.0.0 (https://github.com/llvm/llvm-project.git 71a9518c93fe1dce9611c24bc707e5baf1f39f0d)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, retainedTypes: !3, nameTableKind: None)
  74 !1 = !DIFile(filename: "test.c", directory: "/tmp/home/yhs/work/tests/extern")
  75 !2 = !{}
  76 !3 = !{!4}
  77 !4 = !DISubprogram(name: "global_func", scope: !1, file: !1, line: 1, type: !5, flags: DIFlagPrototyped, spFlags: DISPFlagOptimized, retainedNodes: !2)
  78 !5 = !DISubroutineType(types: !6)
  79 !6 = !{!7, !8}
  80 !7 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
  81 !8 = !DIBasicType(name: "char", size: 8, encoding: DW_ATE_signed_char)
  82 !9 = !{i32 7, !"Dwarf Version", i32 4}
  83 !10 = !{i32 2, !"Debug Info Version", i32 3}
  84 !11 = !{i32 1, !"wchar_size", i32 4}
  85 !12 = !{!"clang version 10.0.0 (https://github.com/llvm/llvm-project.git 71a9518c93fe1dce9611c24bc707e5baf1f39f0d)"}
  86 !13 = distinct !DISubprogram(name: "test", scope: !1, file: !1, line: 2, type: !14, scopeLine: 2, flags: DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !2)
  87 !14 = !DISubroutineType(types: !15)
  88 !15 = !{!7}
  89 !16 = !DILocation(line: 3, column: 11, scope: !13)
  90 !17 = !DILocation(line: 3, column: 4, scope: !13)