gn analyze output:
{
  "compile_targets": [],
  "status": "No dependency",
  "test_targets": []
}
gn analyze input:
{
  "files": [
    "//llvm/utils/gn/secondary/clang/lib/Driver/BUILD.gn",
    "//llvm/utils/gn/secondary/clang/lib/Frontend/BUILD.gn",
    "//llvm/utils/gn/secondary/llvm/lib/Target/RISCV/BUILD.gn",
    "//mlir/include/mlir/Pass/Pass.h",
    "//mlir/lib/Pass/Pass.cpp",
    "//mlir/test/Dialect/Transform/test-pass-application.mlir",
    "//mlir/test/Pass/invalid-unsupported-operation.mlir",
    "//mlir/test/Pass/pipeline-invalid.mlir"
  ],
  "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": []
}