gn analyze output:
{
  "compile_targets": [],
  "status": "Found dependency",
  "test_targets": [
    "//llvm/test:check-llvm"
  ]
}
gn analyze input:
{
  "files": [
    "//flang-rt/lib/runtime/edit-output.cpp",
    "//flang-rt/lib/runtime/io-stmt.cpp",
    "//flang/lib/Parser/prescan.cpp",
    "//flang/lib/Parser/token-sequence.cpp",
    "//flang/test/Parser/OpenMP/compiler-directive-continuation.f90",
    "//flang/test/Preprocessing/kind-suffix.F90",
    "//llvm/tools/llvm-reduce/deltas/ReduceInstructions.cpp",
    "//utils/bazel/llvm-project-overlay/mlir/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": []
}