gn analyze output:
{
  "compile_targets": [],
  "status": "No dependency",
  "test_targets": []
}
gn analyze input:
{
  "files": [
    "//mlir/include/mlir/Bindings/Python/IRAttributes.h",
    "//mlir/include/mlir/IR/BuiltinAttributes.h",
    "//mlir/lib/Bindings/Python/IRAttributes.cpp",
    "//mlir/lib/IR/AttributeDetail.h",
    "//mlir/lib/IR/BuiltinAttributes.cpp",
    "//mlir/test/IR/attribute-roundtrip.mlir",
    "//mlir/test/IR/parse-literal.mlir",
    "//mlir/test/python/ir/array_attributes.py",
    "//mlir/unittests/IR/AttributeTest.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": []
}