gn analyze output:
{
  "compile_targets": [],
  "status": "No dependency",
  "test_targets": []
}
gn analyze input:
{
  "files": [
    "//lldb/include/lldb/Core/Statusline.h",
    "//lldb/source/Core/Statusline.cpp",
    "//mlir/include/mlir/Dialect/MPI/IR/MPIOps.td",
    "//mlir/include/mlir/Dialect/MPI/IR/MPITypes.td",
    "//mlir/lib/Conversion/MPIToLLVM/MPIToLLVM.cpp",
    "//mlir/lib/Conversion/MeshToMPI/MeshToMPI.cpp",
    "//mlir/test/Conversion/MPIToLLVM/mpitollvm.mlir",
    "//mlir/test/Conversion/MeshToMPI/convert-mesh-to-mpi.mlir",
    "//mlir/test/Dialect/MPI/mpiops.mlir"
  ],
  "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": []
}