gn analyze output:
{
  "compile_targets": [],
  "status": "No dependency",
  "test_targets": []
}
gn analyze input:
{
  "files": [
    "//.github/workflows/test-suite/configure-and-build.sh",
    "//.github/workflows/test-suite/llvm.cmake",
    "//libc/cmake/modules/LLVMLibCTestRules.cmake",
    "//libc/test/UnitTest/CMakeLists.txt",
    "//libc/test/UnitTest/LibcTest.h",
    "//libc/test/UnitTest/PlatformDefs.h",
    "//libc/test/src/libgen/CMakeLists.txt",
    "//libc/test/src/libgen/basename_death_test.cpp",
    "//libc/test/src/libgen/dirname_death_test.cpp",
    "//utils/bazel/llvm-project-overlay/libc/test/UnitTest/BUILD.bazel",
    "//utils/bazel/llvm-project-overlay/libc/test/libc_test_rules.bzl"
  ],
  "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