llvm/llvm/test/Linker/Inputs/subprogram-linkonce-weak.ll

define weak i32 @foo(i32 %a, i32 %b) !dbg !3 {
entry:
  %sum = call i32 @fastadd(i32 %a, i32 %b), !dbg !DILocation(line: 52, scope: !3)
  ret i32 %sum, !dbg !DILocation(line: 53, scope: !3)
}

declare i32 @fastadd(i32, i32)

!llvm.module.flags = !{!0}
!0 = !{i32 2, !"Debug Info Version", i32 3}

!llvm.dbg.cu = !{!1}
!1 = distinct !DICompileUnit(language: DW_LANG_C99, file: !2, emissionKind: FullDebug)
!2 = !DIFile(filename: "foo.c", directory: "/path/to/dir")
!3 = distinct !DISubprogram(file: !2, scope: !2, line: 51, name: "foo", type: !4, unit: !1)
!4 = !DISubroutineType(types: !{})