gn analyze output:
{
  "compile_targets": [],
  "status": "No dependency",
  "test_targets": []
}
gn analyze input:
{
  "files": [
    "//clang/bindings/python/clang/cindex.py",
    "//clang/bindings/python/tests/cindex/test_cdb.py",
    "//clang/bindings/python/tests/cindex/test_cursor.py",
    "//clang/bindings/python/tests/cindex/test_index.py",
    "//clang/bindings/python/tests/cindex/test_location.py",
    "//clang/bindings/python/tests/cindex/test_translation_unit.py",
    "//clang/bindings/python/tests/cindex/test_type.py",
    "//libc/test/src/__support/CPP/type_traits_test.cpp",
    "//llvm/utils/gn/secondary/bolt/lib/Passes/BUILD.gn",
    "//llvm/utils/gn/secondary/clang/lib/CodeGen/BUILD.gn",
    "//llvm/utils/gn/secondary/lldb/tools/lldb-dap/BUILD.gn",
    "//llvm/utils/gn/secondary/llvm/lib/Target/SystemZ/MCTargetDesc/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": []
}