gn analyze output:
{
  "compile_targets": [],
  "status": "No dependency",
  "test_targets": []
}
gn analyze input:
{
  "files": [
    "//clang/include/clang/Basic/CMakeLists.txt",
    "//clang/include/clang/CIR/Dialect/CMakeLists.txt",
    "//clang/include/clang/Parse/CMakeLists.txt",
    "//clang/include/clang/Sema/CMakeLists.txt",
    "//clang/include/clang/Serialization/CMakeLists.txt",
    "//clang/lib/AST/CMakeLists.txt",
    "//clang/lib/Headers/CMakeLists.txt",
    "//llvm/include/llvm/TargetParser/CMakeLists.txt",
    "//offload/plugins-nextgen/common/CMakeLists.txt"
  ],
  "test_targets": [
    "//clang-tools-extra/clangd/test:check-clangd",
    "//clang-tools-extra/test:check-clang-tools",
    "//clang/test:check-clang",
    "//compiler-rt/test/hwasan:check-hwasan",
    "//lld/test:check-lld",
    "//llvm/test:check-llvm"
  ],
  "additional_compile_targets": []
}