gn analyze output:
{
  "compile_targets": [],
  "status": "Found dependency",
  "test_targets": [
    "//clang-tools-extra/clangd/test:check-clangd",
    "//clang-tools-extra/test:check-clang-tools",
    "//clang/test:check-clang",
    "//lld/test:check-lld",
    "//llvm/test:check-llvm"
  ]
}
gn analyze input:
{
  "files": [
    "//clang/lib/Lex/PPMacroExpansion.cpp",
    "//clang/test/Headers/__cpuidex_conflict.c",
    "//clang/test/Preprocessor/builtin_aux_info.cpp",
    "//llvm/lib/CodeGen/TailDuplicator.cpp",
    "//llvm/lib/Target/SystemZ/SystemZISelLowering.cpp",
    "//llvm/test/CodeGen/SystemZ/pr124001.ll",
    "//llvm/test/CodeGen/X86/jump-table-partition.ll",
    "//llvm/test/CodeGen/X86/tail-dup-pred-succ-size.mir",
    "//llvm/utils/gn/secondary/lldb/source/Host/BUILD.gn"
  ],
  "test_targets": [
    "//clang-tools-extra/clangd/test:check-clangd",
    "//clang-tools-extra/test:check-clang-tools",
    "//clang/test:check-clang",
    "//lld/test:check-lld",
    "//llvm/test:check-llvm"
  ],
  "additional_compile_targets": []
}