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",
    "//lld/test:check-lld",
    "//llvm/test:check-llvm"
  ]
}
gn analyze input:
{
  "files": [
    "//llvm/docs/ReleaseNotes.md",
    "//llvm/lib/Demangle/MicrosoftDemangle.cpp",
    "//llvm/lib/Transforms/Vectorize/VPlan.cpp",
    "//llvm/test/Demangle/invalid-manglings.test",
    "//llvm/utils/gn/build/sync_source_lists_from_cmake.py",
    "//llvm/utils/gn/secondary/BUILD.gn",
    "//llvm/utils/gn/secondary/compiler-rt/lib/builtins/BUILD.gn",
    "//llvm/utils/gn/secondary/compiler-rt/lib/builtins/sources.gni",
    "//llvm/utils/gn/secondary/compiler-rt/test/builtins/BUILD.gn",
    "//llvm/utils/gn/secondary/libcxx/include/BUILD.gn",
    "//llvm/utils/gn/secondary/llvm/lib/CodeGen/SelectionDAG/BUILD.gn",
    "//llvm/utils/gn/secondary/llvm/unittests/CodeGen/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": []
}