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/include/mlir/Dialect/Ptr/IR/MemorySpaceInterfaces.h",
    "//mlir/include/mlir/Dialect/Ptr/IR/MemorySpaceInterfaces.td",
    "//mlir/include/mlir/Dialect/Ptr/IR/PtrEnums.td",
    "//mlir/include/mlir/Dialect/Ptr/IR/PtrOps.td",
    "//mlir/include/mlir/IR/Properties.td",
    "//mlir/lib/Dialect/Ptr/IR/PtrAttrs.cpp",
    "//mlir/lib/Dialect/Ptr/IR/PtrDialect.cpp",
    "//mlir/test/Dialect/Ptr/invalid.mlir",
    "//mlir/test/Dialect/Ptr/ops.mlir",
    "//mlir/test/lib/Dialect/Test/TestAttributes.cpp"
  ],
  "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": []
}