gn analyze output:
{
  "compile_targets": [],
  "status": "No dependency",
  "test_targets": []
}
gn analyze input:
{
  "files": [
    "//libc/cmake/modules/LLVMLibCTestRules.cmake",
    "//libc/test/UnitTest/FPExceptMatcher.cpp",
    "//libc/test/UnitTest/FPExceptMatcher.h",
    "//libc/test/UnitTest/HermeticTestUtils.cpp",
    "//libc/test/UnitTest/LibcDeathTestExecutors.cpp",
    "//libc/test/UnitTest/LibcTest.h",
    "//libc/test/include/stdbit_stub.h",
    "//libc/test/integration/src/pthread/pthread_mutex_test.cpp",
    "//libc/test/integration/src/spawn/posix_spawn_test.cpp",
    "//libc/test/integration/src/spawn/posix_spawn_test_binary.cpp",
    "//libc/test/integration/src/stdio/sprintf_size_test.cpp",
    "//libc/test/integration/src/stdlib/getenv_test.cpp",
    "//libc/test/integration/src/threads/cnd_test.cpp",
    "//libc/test/integration/src/threads/mtx_test.cpp",
    "//libc/test/integration/src/unistd/execv_test.cpp",
    "//libc/test/integration/src/unistd/execve_test.cpp",
    "//libc/test/integration/src/unistd/fork_test.cpp",
    "//libc/test/integration/src/unistd/getcwd_test.cpp",
    "//libc/test/integration/startup/linux/main_without_envp.cpp",
    "//libc/test/integration/startup/linux/tls_test.cpp",
    "//libc/test/src/__support/CPP/integer_sequence_test.cpp",
    "//libc/test/src/__support/freelist_heap_test.cpp",
    "//libc/test/src/math/exhaustive/hypotf16_test.cpp",
    "//libc/test/src/stdlib/StrfromTest.h",
    "//libc/test/src/string/memory_utils/op_tests.cpp",
    "//libc/test/src/strings/bzero_test.cpp",
    "//libc/utils/MPFRWrapper/MPFRUtils.h"
  ],
  "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