gn analyze output:
{
  "compile_targets": [],
  "status": "No dependency",
  "test_targets": []
}
gn analyze input:
{
  "files": [
    "//mlir/docs/DeclarativeRewrites.md",
    "//mlir/docs/DefiningDialects/Operations.md",
    "//mlir/include/mlir/IR/OpDefinition.h",
    "//mlir/include/mlir/IR/OperationSupport.h",
    "//mlir/test/lib/Dialect/Test/TestOps.td",
    "//mlir/test/mlir-tblgen/op-attribute.td",
    "//mlir/test/mlir-tblgen/op-decl-and-defs.td",
    "//mlir/test/mlir-tblgen/op-result.td",
    "//mlir/tools/mlir-tblgen/OpDefinitionsGen.cpp",
    "//mlir/unittests/TableGen/OpBuildGen.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": []
}