gn analyze output:
{
  "compile_targets": [],
  "status": "No dependency",
  "test_targets": []
}
gn analyze input:
{
  "files": [
    "//libcxx/include/__tree",
    "//mlir/include/mlir/InitAllTranslations.h",
    "//mlir/include/mlir/Target/SMTLIB/ExportSMTLIB.h",
    "//mlir/include/mlir/Target/SMTLIB/Namespace.h",
    "//mlir/include/mlir/Target/SMTLIB/SymCache.h",
    "//mlir/lib/Target/CMakeLists.txt",
    "//mlir/lib/Target/SMTLIB/CMakeLists.txt",
    "//mlir/lib/Target/SMTLIB/ExportSMTLIB.cpp",
    "//mlir/test/Target/SMTLIB/array.mlir",
    "//mlir/test/Target/SMTLIB/attributes.mlir",
    "//mlir/test/Target/SMTLIB/bitvector-errors.mlir",
    "//mlir/test/Target/SMTLIB/bitvector.mlir",
    "//mlir/test/Target/SMTLIB/core-errors.mlir",
    "//mlir/test/Target/SMTLIB/core.mlir",
    "//mlir/test/Target/SMTLIB/integer-errors.mlir",
    "//mlir/test/Target/SMTLIB/integer.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": []
}