gn analyze output:
{
  "compile_targets": [],
  "status": "No dependency",
  "test_targets": []
}
gn analyze input:
{
  "files": [
    "//mlir/include/mlir/Dialect/Complex/IR/ComplexAttributes.td",
    "//mlir/include/mlir/ExecutionEngine/SparseTensor/File.h",
    "//mlir/include/mlir/IR/BuiltinAttributes.h",
    "//mlir/include/mlir/IR/BuiltinAttributes.td",
    "//mlir/include/mlir/Support/Complex.h",
    "//mlir/lib/AsmParser/AttributeParser.cpp",
    "//mlir/lib/Conversion/ComplexToLLVM/ComplexToLLVM.cpp",
    "//mlir/lib/IR/AsmPrinter.cpp",
    "//mlir/lib/IR/BuiltinAttributes.cpp",
    "//mlir/unittests/IR/AttributeTest.cpp",
    "//mlir/unittests/Support/CMakeLists.txt",
    "//mlir/unittests/Support/ComplexTest.cpp"
  ],
  "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": []
}