gn analyze output:
{
  "compile_targets": [],
  "status": "Found dependency",
  "test_targets": [
    "//clang-tools-extra/clangd/test:check-clangd",
    "//clang-tools-extra/test:check-clang-tools",
    "//clang/test:check-clang",
    "//compiler-rt/test/hwasan:check-hwasan",
    "//lld/test:check-lld",
    "//llvm/test:check-llvm"
  ]
}
gn analyze input:
{
  "files": [
    "//llvm/lib/Support/ARMBuildAttrs.cpp",
    "//llvm/lib/Support/ConvertUTFWrapper.cpp",
    "//llvm/lib/Support/DAGDeltaAlgorithm.cpp",
    "//llvm/lib/Support/InitLLVM.cpp",
    "//llvm/lib/Support/LockFileManager.cpp",
    "//llvm/lib/Support/MSP430AttributeParser.cpp",
    "//llvm/lib/Support/MemoryBuffer.cpp",
    "//llvm/lib/Support/NativeFormatting.cpp",
    "//llvm/lib/Support/Path.cpp",
    "//llvm/lib/Support/Process.cpp",
    "//llvm/lib/Support/RWMutex.cpp",
    "//llvm/lib/Support/SuffixTreeNode.cpp",
    "//llvm/lib/Support/Threading.cpp",
    "//llvm/lib/Support/VirtualFileSystem.cpp",
    "//llvm/lib/Support/YAMLTraits.cpp",
    "//llvm/lib/Support/raw_ostream.cpp",
    "//llvm/lib/Support/raw_socket_stream.cpp"
  ],
  "test_targets": [
    "//clang-tools-extra/clangd/test:check-clangd",
    "//clang-tools-extra/test:check-clang-tools",
    "//clang/test:check-clang",
    "//compiler-rt/test/hwasan:check-hwasan",
    "//lld/test:check-lld",
    "//llvm/test:check-llvm"
  ],
  "additional_compile_targets": []
}