gn analyze output:
{
  "compile_targets": [],
  "status": "No dependency",
  "test_targets": []
}
gn analyze input:
{
  "files": [
    "//flang/lib/Lower/OpenACC.cpp",
    "//flang/test/Lower/OpenACC/acc-data-operands.f90",
    "//flang/test/Lower/OpenACC/acc-data.f90",
    "//flang/test/Lower/OpenACC/acc-declare-globals.f90",
    "//flang/test/Lower/OpenACC/acc-declare.f90",
    "//flang/test/Lower/OpenACC/acc-kernels-loop.f90",
    "//flang/test/Lower/OpenACC/acc-kernels.f90",
    "//flang/test/Lower/OpenACC/acc-parallel-loop.f90",
    "//flang/test/Lower/OpenACC/acc-parallel.f90",
    "//flang/test/Lower/OpenACC/acc-serial-loop.f90",
    "//flang/test/Lower/OpenACC/acc-serial.f90"
  ],
  "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": []
}