gn analyze output:
{
  "compile_targets": [],
  "status": "No dependency",
  "test_targets": []
}
gn analyze input:
{
  "files": [
    "//libcxx/test/std/utilities/memory/specialized.algorithms/specialized.construct/construct_at.pass.cpp",
    "//libcxx/test/std/utilities/memory/specialized.algorithms/specialized.construct/ranges_construct_at.pass.cpp",
    "//lldb/test/API/tools/lldb-server/register-reading/TestGdbRemoteGPacket.py",
    "//lldb/tools/debugserver/source/MacOSX/MachProcess.mm",
    "//lldb/tools/debugserver/source/RNBRemote.cpp",
    "//lldb/tools/debugserver/source/RNBRemote.h",
    "//llvm/utils/gn/secondary/libcxx/include/BUILD.gn",
    "//llvm/utils/gn/secondary/llvm/lib/Analysis/BUILD.gn",
    "//llvm/utils/gn/secondary/llvm/unittests/Analysis/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": []
}