gn analyze output:
{
  "compile_targets": [],
  "status": "Found dependency",
  "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"
  ]
}
gn analyze input:
{
  "files": [
    "//.github/workflows/libcxx-build-and-test.yaml",
    "//libcxx/test/libcxx/strings/basic.string/string.capacity/allocation_size.pass.cpp",
    "//libcxx/test/std/input.output/file.streams/fstreams/filebuf.virtuals/setbuf.pass.cpp",
    "//libcxx/test/std/localization/locale.categories/category.numeric/locale.num.get/facet.num.get.members/get_double.pass.cpp",
    "//libcxx/test/std/localization/locale.categories/category.numeric/locale.num.get/facet.num.get.members/get_float.pass.cpp",
    "//libcxx/test/std/localization/locale.categories/category.numeric/locale.num.get/facet.num.get.members/get_long_double.pass.cpp",
    "//libcxx/test/std/strings/basic.string/string.capacity/max_size.pass.cpp",
    "//libcxx/test/std/strings/basic.string/string.capacity/over_max_size.pass.cpp",
    "//llvm/include/llvm/MC/MCExpr.h",
    "//llvm/include/llvm/MC/MCValue.h",
    "//llvm/lib/MC/MCExpr.cpp",
    "//llvm/lib/MC/MCValue.cpp",
    "//llvm/lib/Target/WebAssembly/MCTargetDesc/WebAssemblyWasmObjectWriter.cpp",
    "//llvm/utils/gn/secondary/libcxx/include/BUILD.gn",
    "//llvm/utils/gn/secondary/llvm/unittests/CodeGen/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