gn analyze output:
{
  "compile_targets": [],
  "status": "No dependency",
  "test_targets": []
}
gn analyze input:
{
  "files": [
    "//libcxx/docs/ABIGuarantees.rst",
    "//libcxx/docs/ReleaseNotes/22.rst",
    "//libcxx/include/__configuration/abi.h",
    "//libcxx/include/__iterator/back_insert_iterator.h",
    "//libcxx/include/__iterator/front_insert_iterator.h",
    "//libcxx/include/__iterator/insert_iterator.h",
    "//libcxx/include/__iterator/istream_iterator.h",
    "//libcxx/include/__iterator/istreambuf_iterator.h",
    "//libcxx/include/__iterator/iterator.h",
    "//libcxx/include/__iterator/ostream_iterator.h",
    "//libcxx/include/__iterator/ostreambuf_iterator.h",
    "//libcxx/include/__iterator/reverse_iterator.h",
    "//libcxx/include/__memory/raw_storage_iterator.h",
    "//llvm/utils/gn/secondary/clang-tools-extra/clang-reorder-fields/BUILD.gn",
    "//llvm/utils/gn/secondary/clang/lib/StaticAnalyzer/Checkers/BUILD.gn",
    "//llvm/utils/gn/secondary/libcxx/include/BUILD.gn",
    "//llvm/utils/gn/secondary/llvm/unittests/Target/RISCV/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": []
}
running all tests due to change to blacklisted file