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": [
    "//clang/lib/Sema/CMakeLists.txt",
    "//clang/lib/Sema/SemaDeclAttr.cpp",
    "//clang/test/AST/ast-dump-attr-json.cpp",
    "//clang/test/Sema/alias-unused-win.cpp",
    "//clang/test/Sema/alias-unused.cpp",
    "//llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp",
    "//llvm/test/CodeGen/X86/any_extend_vector_inreg_of_broadcast.ll",
    "//llvm/test/CodeGen/X86/dpbusd.ll",
    "//llvm/test/CodeGen/X86/dpbusd_i4.ll",
    "//llvm/test/CodeGen/X86/vector-interleaved-load-i16-stride-3.ll",
    "//llvm/test/CodeGen/X86/vector-interleaved-store-i8-stride-7.ll",
    "//llvm/test/CodeGen/X86/zero_extend_vector_inreg_of_broadcast.ll",
    "//llvm/utils/gn/secondary/libcxx/include/BUILD.gn",
    "//utils/bazel/llvm-project-overlay/clang/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": []
}