gn analyze output:
{
  "compile_targets": [],
  "status": "No dependency",
  "test_targets": []
}
gn analyze input:
{
  "files": [
    "//flang/cmake/modules/FlangCommon.cmake",
    "//llvm/test/tools/llvm-symbolizer/use-debug-info-line-info.s",
    "//mlir/include/mlir/IR/MLIRContext.h",
    "//mlir/lib/IR/AttributeDetail.h",
    "//mlir/lib/IR/MLIRContext.cpp",
    "//mlir/lib/Pass/PassCrashRecovery.cpp",
    "//mlir/test/Dialect/LLVMIR/add-debuginfo-func-scope-with-crash-reproduction.mlir",
    "//mlir/test/IR/test-builtin-distinct-attrs-with-crash-reproduction.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": []
}