gn analyze output:
{
  "compile_targets": [],
  "status": "No dependency",
  "test_targets": []
}
gn analyze input:
{
  "files": [
    "//libc/src/__support/FPUtil/generic/CMakeLists.txt",
    "//libc/src/__support/FPUtil/generic/add_sub.h",
    "//libc/test/src/math/AddTest.h",
    "//libc/test/src/math/CMakeLists.txt",
    "//libc/test/src/math/SubTest.h",
    "//libc/test/src/math/add_same_type_test.cpp",
    "//libc/test/src/math/smoke/AddTest.h",
    "//libc/test/src/math/smoke/CMakeLists.txt",
    "//libc/test/src/math/smoke/SubTest.h",
    "//libc/test/src/math/smoke/add_same_type_test.cpp",
    "//libc/test/src/math/smoke/sub_same_type_test.cpp",
    "//libc/test/src/math/sub_same_type_test.cpp",
    "//libc/utils/MPFRWrapper/MPFRUtils.cpp"
  ],
  "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