gn analyze output:
{
  "compile_targets": [],
  "status": "Found dependency",
  "test_targets": [
    "//clang-tools-extra/test:check-clang-tools",
    "//clang/test:check-clang"
  ]
}
gn analyze input:
{
  "files": [
    "//libcxx/docs/ReleaseNotes/21.rst",
    "//libcxx/docs/Status/Cxx2cPapers.csv",
    "//libcxx/include/__config",
    "//libcxx/include/__iterator/aliasing_iterator.h",
    "//libcxx/include/__type_traits/is_char_like_type.h",
    "//libcxx/include/__type_traits/is_trivial.h",
    "//libcxx/include/string",
    "//libcxx/include/string_view",
    "//libcxx/include/type_traits",
    "//libcxx/test/libcxx/memory/allocator_void.trivial.compile.pass.cpp",
    "//libcxx/test/libcxx/utilities/memory/util.smartptr/util.smartptr.shared/libcxx.control_block_layout.pass.cpp",
    "//libcxx/test/libcxx/utilities/utility/private_constructor_tag.compile.pass.cpp",
    "//libcxx/test/std/depr/depr.c.headers/stddef_h.compile.pass.cpp",
    "//libcxx/test/std/language.support/support.types/byte.pass.cpp",
    "//libcxx/test/std/language.support/support.types/max_align_t.compile.pass.cpp",
    "//libcxx/test/std/library/description/conventions/customization.point.object/cpo.compile.pass.cpp",
    "//libcxx/test/std/library/description/conventions/customization.point.object/niebloid.compile.pass.cpp",
    "//libcxx/test/std/ranges/range.req/range.view/view_base.compile.pass.cpp",
    "//libcxx/test/std/strings/basic.string/char.bad.verify.cpp",
    "//libcxx/test/std/strings/string.view/char.bad.verify.cpp",
    "//libcxx/test/std/time/time.zone/time.zone.zonedtraits/types.compile.pass.cpp",
    "//libcxx/test/std/utilities/meta/meta.trans/meta.trans.other/aligned_storage.pass.cpp",
    "//libcxx/test/std/utilities/meta/meta.trans/meta.trans.other/aligned_union.pass.cpp",
    "//libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/is_trivial.deprecated.verify.cpp",
    "//libcxx/test/std/utilities/meta/meta.unary/meta.unary.prop/is_trivial.pass.cpp",
    "//libcxx/test/std/utilities/tuple/tuple.general/ignore.pass.cpp",
    "//libcxx/test/support/nasty_string.h",
    "//libcxxabi/src/demangle/ItaniumDemangle.h",
    "//llvm/utils/gn/secondary/llvm/tools/dsymutil/BUILD.gn"
  ],
  "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": []
}
running all tests due to change to blacklisted file