gn analyze output:
{
  "compile_targets": [],
  "status": "No dependency",
  "test_targets": []
}
gn analyze input:
{
  "files": [
    "//.github/workflows/libcxx-build-and-test.yaml",
    "//libcxx/cmake/caches/Generic-hardening-mode-extensive-observe-semantic.cmake",
    "//libcxx/docs/Hardening.rst",
    "//libcxx/docs/ReleaseNotes/21.rst",
    "//libcxx/docs/UserDocumentation.rst",
    "//libcxx/include/__config",
    "//libcxx/include/__cxx03/__config",
    "//libcxx/test/libcxx/thread/thread.barrier/assert.arrive.pass.cpp",
    "//libcxx/test/libcxx/thread/thread.latch/assert.arrive_and_wait.pass.cpp",
    "//libcxx/test/support/check_assertion.h",
    "//libcxx/test/support/test.support/test_check_assertion.pass.cpp",
    "//libcxx/utils/ci/run-buildbot",
    "//libcxx/utils/libcxx/test/params.py",
    "//libcxx/vendor/llvm/default_assertion_handler.in",
    "//libcxxabi/src/demangle/DemangleConfig.h",
    "//mlir/include/mlir/Dialect/ArmSME/IR/ArmSMEIntrinsicOps.td",
    "//mlir/include/mlir/Dialect/ArmSVE/IR/ArmSVE.td",
    "//mlir/include/mlir/Dialect/LLVMIR/LLVMIntrinsicOps.td",
    "//mlir/include/mlir/Dialect/LLVMIR/LLVMOpBase.td",
    "//mlir/include/mlir/Dialect/LLVMIR/LLVMOps.td",
    "//mlir/include/mlir/Dialect/LLVMIR/ROCDLOps.td",
    "//mlir/include/mlir/Interfaces/CallInterfaces.td",
    "//mlir/include/mlir/Target/LLVMIR/ModuleImport.h",
    "//mlir/include/mlir/Target/LLVMIR/ModuleTranslation.h",
    "//mlir/lib/Target/LLVMIR/Dialect/LLVMIR/LLVMToLLVMIRTranslation.cpp",
    "//mlir/lib/Target/LLVMIR/LLVMImportInterface.cpp",
    "//mlir/lib/Target/LLVMIR/ModuleImport.cpp",
    "//mlir/lib/Target/LLVMIR/ModuleTranslation.cpp",
    "//mlir/test/Target/LLVMIR/Import/intrinsic.ll",
    "//mlir/test/Target/LLVMIR/llvmir-intrinsics.mlir"
  ],
  "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