gn analyze output:
{
  "compile_targets": [],
  "status": "No dependency",
  "test_targets": []
}
gn analyze input:
{
  "files": [
    "//flang/CMakeLists.txt",
    "//flang/cmake/modules/AddFlang.cmake",
    "//flang/lib/Frontend/CMakeLists.txt",
    "//flang/lib/Lower/CMakeLists.txt",
    "//flang/lib/Optimizer/Analysis/CMakeLists.txt",
    "//flang/lib/Optimizer/Builder/CMakeLists.txt",
    "//flang/lib/Optimizer/Dialect/CMakeLists.txt",
    "//flang/lib/Optimizer/Dialect/CUF/Attributes/CMakeLists.txt",
    "//flang/lib/Optimizer/Dialect/CUF/CMakeLists.txt",
    "//flang/lib/Optimizer/Dialect/Support/CMakeLists.txt",
    "//flang/lib/Optimizer/HLFIR/IR/CMakeLists.txt",
    "//flang/lib/Optimizer/HLFIR/Transforms/CMakeLists.txt",
    "//flang/lib/Optimizer/OpenACC/CMakeLists.txt",
    "//flang/lib/Optimizer/OpenMP/CMakeLists.txt",
    "//flang/lib/Optimizer/Support/CMakeLists.txt",
    "//flang/test/CMakeLists.txt",
    "//flang/test/lib/Analysis/AliasAnalysis/CMakeLists.txt",
    "//flang/test/lib/OpenACC/CMakeLists.txt",
    "//flang/unittests/Optimizer/CMakeLists.txt"
  ],
  "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": []
}