gn analyze output:
{
  "compile_targets": [],
  "status": "No dependency",
  "test_targets": []
}
gn analyze input:
{
  "files": [
    "//libcxx/include/CMakeLists.txt",
    "//libcxx/include/__algorithm/pstl.h",
    "//libcxx/include/__execution/execution_policies.h",
    "//libcxx/include/__execution/is_execution_policy.h",
    "//libcxx/include/__memory/pstl.h",
    "//libcxx/include/__numeric/pstl.h",
    "//libcxx/include/__pstl/cpu_algos/any_of.h",
    "//libcxx/include/__pstl/cpu_algos/fill.h",
    "//libcxx/include/__pstl/cpu_algos/find_end.h",
    "//libcxx/include/__pstl/cpu_algos/find_if.h",
    "//libcxx/include/__pstl/cpu_algos/for_each.h",
    "//libcxx/include/__pstl/cpu_algos/is_heap_until.h",
    "//libcxx/include/__pstl/cpu_algos/merge.h",
    "//libcxx/include/__pstl/cpu_algos/min_element.h",
    "//libcxx/include/__pstl/cpu_algos/minmax_element.h",
    "//libcxx/include/__pstl/cpu_algos/mismatch.h",
    "//libcxx/include/__pstl/cpu_algos/reverse.h",
    "//libcxx/include/__pstl/cpu_algos/search.h",
    "//libcxx/include/__pstl/cpu_algos/search_n.h",
    "//libcxx/include/__pstl/cpu_algos/stable_sort.h",
    "//libcxx/include/__pstl/cpu_algos/swap_ranges.h",
    "//libcxx/include/__pstl/cpu_algos/transform.h",
    "//libcxx/include/__pstl/cpu_algos/transform_reduce.h",
    "//libcxx/include/__pstl/cpu_algos/uninitialized_algorithms.h",
    "//libcxx/include/execution",
    "//libcxx/include/module.modulemap.in",
    "//llvm/utils/gn/secondary/libcxx/include/BUILD.gn"
  ],
  "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": []
}
running all tests due to change to blacklisted file