gn analyze output:
{
  "compile_targets": [],
  "status": "No dependency",
  "test_targets": []
}
gn analyze input:
{
  "files": [
    "//libcxx/test/extensions/clang/thread/thread.mutex/lock.verify.cpp",
    "//libcxx/test/libcxx/containers/associative/map/abi.compile.pass.cpp",
    "//libcxx/test/libcxx/containers/associative/unord.map/abi.compile.pass.cpp",
    "//libcxx/test/libcxx/utilities/tuple/abi.compile.pass.cpp",
    "//llvm/test/CodeGen/X86/AMX/amx-sink-config-after-calls.mir",
    "//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": []
}