test/CodeGen/BPF/BTF/extern-var-struct-weak.ll

; RUN: llc -march=bpfel -filetype=asm -o - %s | FileCheck -check-prefixes=CHECK %s
; RUN: llc -march=bpfeb -filetype=asm -o - %s | FileCheck -check-prefixes=CHECK %s
;
; Source code:
;   typedef struct t1 { int f1; } __t1;
;   extern __t1 global __attribute__((weak));
;   int test() { return global.f1; }
; Compilation flag:
;   clang -target bpf -O2 -g -S -emit-llvm test.c

%struct.t1 = type { i32 }

@global = extern_weak dso_local local_unnamed_addr global %struct.t1, align 4, !dbg !0
; Function Attrs: norecurse nounwind readonly
define dso_local i32 @test() local_unnamed_addr #0 !dbg !15 {
entry:
  %0 = load i32, i32* getelementptr (%struct.t1, %struct.t1* @global, i64 0, i32 0), align 4, !dbg !18, !tbaa !19
  ret i32 %0, !dbg !24
}

; CHECK:             .section        .BTF,"",@progbits
; CHECK-NEXT:        .short  60319                   # 0xeb9f
; CHECK-NEXT:        .byte   1
; CHECK-NEXT:        .byte   0
; CHECK-NEXT:        .long   24
; CHECK-NEXT:        .long   0
; CHECK-NEXT:        .long   92
; CHECK-NEXT:        .long   92
; CHECK-NEXT:        .long   73
; CHECK-NEXT:        .long   0                       # BTF_KIND_FUNC_PROTO(id = 1)
; CHECK-NEXT:        .long   218103808               # 0xd000000
; CHECK-NEXT:        .long   2
; CHECK-NEXT:        .long   1                       # BTF_KIND_INT(id = 2)
; CHECK-NEXT:        .long   16777216                # 0x1000000
; CHECK-NEXT:        .long   4
; CHECK-NEXT:        .long   16777248                # 0x1000020
; CHECK-NEXT:        .long   5                       # BTF_KIND_FUNC(id = 3)
; CHECK-NEXT:        .long   201326593               # 0xc000001
; CHECK-NEXT:        .long   1
; CHECK-NEXT:        .long   55                      # BTF_KIND_TYPEDEF(id = 4)
; CHECK-NEXT:        .long   134217728               # 0x8000000
; CHECK-NEXT:        .long   5
; CHECK-NEXT:        .long   60                      # BTF_KIND_STRUCT(id = 5)
; CHECK-NEXT:        .long   67108865                # 0x4000001
; CHECK-NEXT:        .long   4
; CHECK-NEXT:        .long   63
; CHECK-NEXT:        .long   2
; CHECK-NEXT:        .long   0                       # 0x0
; CHECK-NEXT:        .long   66                      # BTF_KIND_VAR(id = 6)
; CHECK-NEXT:        .long   234881024               # 0xe000000
; CHECK-NEXT:        .long   4
; CHECK-NEXT:        .long   2
; CHECK-NEXT:        .byte   0                       # string offset=0
; CHECK-NEXT:        .ascii  "int"                   # string offset=1
; CHECK-NEXT:        .byte   0
; CHECK-NEXT:        .ascii  "test"                  # string offset=5
; CHECK-NEXT:        .byte   0
; CHECK-NEXT:        .ascii  ".text"                 # string offset=10
; CHECK-NEXT:        .byte   0
; CHECK-NEXT:        .ascii  "/tmp/home/yhs/work/tests/extern/test.c" # string offset=16
; CHECK-NEXT:        .byte   0
; CHECK-NEXT:        .ascii  "__t1"                  # string offset=55
; CHECK-NEXT:        .byte   0
; CHECK-NEXT:        .ascii  "t1"                    # string offset=60
; CHECK-NEXT:        .byte   0
; CHECK-NEXT:        .ascii  "f1"                    # string offset=63
; CHECK-NEXT:        .byte   0
; CHECK-NEXT:        .ascii  "global"                # string offset=66
; CHECK-NEXT:        .byte   0

attributes #0 = { norecurse 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" }

!llvm.dbg.cu = !{!2}
!llvm.module.flags = !{!11, !12, !13}
!llvm.ident = !{!14}

!0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression())
!1 = distinct !DIGlobalVariable(name: "global", scope: !2, file: !3, line: 2, type: !6, isLocal: false, isDefinition: false)
!2 = distinct !DICompileUnit(language: DW_LANG_C99, file: !3, producer: "clang version 10.0.0 (https://github.com/llvm/llvm-project.git 71a9518c93fe1dce9611c24bc707e5baf1f39f0d)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !4, globals: !5, nameTableKind: None)
!3 = !DIFile(filename: "test.c", directory: "/tmp/home/yhs/work/tests/extern")
!4 = !{}
!5 = !{!0}
!6 = !DIDerivedType(tag: DW_TAG_typedef, name: "__t1", file: !3, line: 1, baseType: !7)
!7 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "t1", file: !3, line: 1, size: 32, elements: !8)
!8 = !{!9}
!9 = !DIDerivedType(tag: DW_TAG_member, name: "f1", scope: !7, file: !3, line: 1, baseType: !10, size: 32)
!10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
!11 = !{i32 7, !"Dwarf Version", i32 4}
!12 = !{i32 2, !"Debug Info Version", i32 3}
!13 = !{i32 1, !"wchar_size", i32 4}
!14 = !{!"clang version 10.0.0 (https://github.com/llvm/llvm-project.git 71a9518c93fe1dce9611c24bc707e5baf1f39f0d)"}
!15 = distinct !DISubprogram(name: "test", scope: !3, file: !3, line: 3, type: !16, scopeLine: 3, flags: DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !2, retainedNodes: !4)
!16 = !DISubroutineType(types: !17)
!17 = !{!10}
!18 = !DILocation(line: 3, column: 28, scope: !15)
!19 = !{!20, !21, i64 0}
!20 = !{!"t1", !21, i64 0}
!21 = !{!"int", !22, i64 0}
!22 = !{!"omnipotent char", !23, i64 0}
!23 = !{!"Simple C/C++ TBAA"}
!24 = !DILocation(line: 3, column: 14, scope: !15)