gn analyze output:
{
  "compile_targets": [],
  "status": "No dependency",
  "test_targets": []
}
gn analyze input:
{
  "files": [
    "//clang/test/OpenMP/nvptx_throw_trap.cpp",
    "//libc/src/__support/OSUtil/linux/CMakeLists.txt",
    "//libc/src/__support/OSUtil/linux/vdso.cpp",
    "//libc/src/unistd/linux/CMakeLists.txt",
    "//libc/src/unistd/linux/sysconf.cpp",
    "//lldb/unittests/API/CMakeLists.txt",
    "//lldb/unittests/CMakeLists.txt",
    "//lldb/unittests/DAP/CMakeLists.txt",
    "//utils/bazel/llvm-project-overlay/libc/BUILD.bazel",
    "//utils/bazel/llvm-project-overlay/mlir/BUILD.bazel",
    "//utils/bazel/llvm-project-overlay/mlir/test/BUILD.bazel"
  ],
  "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": []
}