test/CodeGen/BPF/BTF/extern-global-var.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 char a;
   6 ;   int foo() { return a; }
   7 ; Compilation flag:
   8 ;   clang -target bpf -O2 -g -S -emit-llvm test.c
   9
  10 @a = external dso_local local_unnamed_addr global i8, align 1
  11
  12 ; Function Attrs: norecurse nounwind readonly
  13 define dso_local i32 @foo() local_unnamed_addr #0 !dbg !7 {
  14   %1 = load i8, i8* @a, align 1, !dbg !11, !tbaa !12
  15   %2 = sext i8 %1 to i32, !dbg !11
  16   ret i32 %2, !dbg !15
  17 }
  18
  19 ; CHECK:             .section        .BTF,"",@progbits
  20 ; CHECK-NEXT:        .short  60319                   # 0xeb9f
  21 ; CHECK-NEXT:        .byte   1
  22 ; CHECK-NEXT:        .byte   0
  23 ; CHECK-NEXT:        .long   24
  24 ; CHECK-NEXT:        .long   0
  25 ; CHECK-NEXT:        .long   40
  26 ; CHECK-NEXT:        .long   40
  27 ; CHECK-NEXT:        .long   52
  28 ; CHECK-NEXT:        .long   0                       # BTF_KIND_FUNC_PROTO(id = 1)
  29 ; CHECK-NEXT:        .long   218103808               # 0xd000000
  30 ; CHECK-NEXT:        .long   2
  31 ; CHECK-NEXT:        .long   1                       # BTF_KIND_INT(id = 2)
  32 ; CHECK-NEXT:        .long   16777216                # 0x1000000
  33 ; CHECK-NEXT:        .long   4
  34 ; CHECK-NEXT:        .long   16777248                # 0x1000020
  35 ; CHECK-NEXT:        .long   5                       # BTF_KIND_FUNC(id = 3)
  36 ; CHECK-NEXT:        .long   201326592               # 0xc000000
  37 ; CHECK-NEXT:        .long   1
  38 ; CHECK-NEXT:        .byte   0                       # string offset=0
  39 ; CHECK-NEXT:        .ascii  "int"                   # string offset=1
  40 ; CHECK-NEXT:        .byte   0
  41 ; CHECK-NEXT:        .ascii  "foo"                   # string offset=5
  42 ; CHECK-NEXT:        .byte   0
  43 ; CHECK-NEXT:        .ascii  ".text"                 # string offset=9
  44 ; CHECK-NEXT:        .byte   0
  45 ; CHECK-NEXT:        .ascii  "/home/yhs/work/tests/llvm/bug/test.c" # string offset=15
  46 ; CHECK-NEXT:        .byte   0
  47
  48 attributes #0 = { norecurse nounwind readonly "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "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" }
  49
  50 !llvm.dbg.cu = !{!0}
  51 !llvm.module.flags = !{!3, !4, !5}
  52 !llvm.ident = !{!6}
  53
  54 !0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 8.0.20181009 ", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, nameTableKind: None)
  55 !1 = !DIFile(filename: "test.c", directory: "/home/yhs/work/tests/llvm/bug")
  56 !2 = !{}
  57 !3 = !{i32 2, !"Dwarf Version", i32 4}
  58 !4 = !{i32 2, !"Debug Info Version", i32 3}
  59 !5 = !{i32 1, !"wchar_size", i32 4}
  60 !6 = !{!"clang version 8.0.20181009 "}
  61 !7 = distinct !DISubprogram(name: "foo", scope: !1, file: !1, line: 2, type: !8, isLocal: false, isDefinition: true, scopeLine: 2, isOptimized: true, unit: !0, retainedNodes: !2)
  62 !8 = !DISubroutineType(types: !9)
  63 !9 = !{!10}
  64 !10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
  65 !11 = !DILocation(line: 2, column: 20, scope: !7)
  66 !12 = !{!13, !13, i64 0}
  67 !13 = !{!"omnipotent char", !14, i64 0}
  68 !14 = !{!"Simple C/C++ TBAA"}
  69 !15 = !DILocation(line: 2, column: 13, scope: !7)