gn analyze output:
{
  "compile_targets": [],
  "status": "No dependency",
  "test_targets": []
}
gn analyze input:
{
  "files": [
    "//libcxx/include/__locale",
    "//libcxx/include/ios",
    "//libcxx/src/ios.cpp",
    "//mlir/include/mlir/Transforms/Passes.h",
    "//mlir/include/mlir/Transforms/Passes.td",
    "//mlir/include/mlir/Transforms/RegionUtils.h",
    "//mlir/lib/Dialect/LLVMIR/IR/BasicPtxBuilderInterface.cpp",
    "//mlir/lib/Dialect/Transform/IR/TransformOps.cpp",
    "//mlir/lib/Transforms/CMakeLists.txt",
    "//mlir/lib/Transforms/TrivialDeadCodeElimination.cpp",
    "//mlir/lib/Transforms/Utils/RegionUtils.cpp",
    "//mlir/test/Conversion/NVVMToLLVM/nvvm-to-llvm.mlir",
    "//mlir/test/Transforms/dead-code-elimination.mlir"
  ],
  "test_targets": [
    "//clang-tools-extra/clangd/test:check-clangd",
    "//clang-tools-extra/test:check-clang-tools",
    "//clang/test:check-clang",
    "//compiler-rt/test/hwasan:check-hwasan",
    "//lld/test:check-lld",
    "//llvm/test:check-llvm"
  ],
  "additional_compile_targets": []
}