gn analyze output:
{
  "compile_targets": [],
  "status": "No dependency",
  "test_targets": []
}
gn analyze input:
{
  "files": [
    "//llvm/utils/gn/secondary/clang-tools-extra/clang-reorder-fields/BUILD.gn",
    "//llvm/utils/gn/secondary/libcxx/include/BUILD.gn",
    "//mlir/docs/Bindings/Python.md",
    "//mlir/include/mlir-c/IR.h",
    "//mlir/lib/Bindings/Python/IRCore.cpp",
    "//mlir/lib/Bindings/Python/IRModule.h",
    "//mlir/lib/Bindings/Python/Pass.cpp",
    "//mlir/lib/Bindings/Python/TransformInterpreter.cpp",
    "//mlir/lib/CAPI/IR/IR.cpp",
    "//mlir/test/python/ir/module.py",
    "//mlir/test/python/ir/operation.py",
    "//mlir/test/python/ir/symbol_table.py",
    "//mlir/test/python/pass_manager.py"
  ],
  "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": []
}