gn analyze output:
{
  "compile_targets": [],
  "status": "No dependency",
  "test_targets": []
}
gn analyze input:
{
  "files": [
    "//clang/lib/CIR/CodeGen/CIRGenDeclOpenACC.cpp",
    "//clang/lib/CIR/CodeGen/CIRGenOpenACCClause.cpp",
    "//clang/test/CIR/CodeGenOpenACC/declare-present.cpp",
    "//llvm/utils/gn/secondary/clang/lib/Driver/BUILD.gn",
    "//llvm/utils/gn/secondary/clang/lib/Frontend/BUILD.gn",
    "//llvm/utils/gn/secondary/libcxx/include/BUILD.gn",
    "//llvm/utils/gn/secondary/llvm/lib/Target/RISCV/BUILD.gn",
    "//mlir/include/mlir-c/Dialect/LLVM.h",
    "//mlir/lib/Bindings/Python/DialectLLVM.cpp",
    "//mlir/lib/CAPI/Dialect/LLVM.cpp",
    "//mlir/test/python/dialects/llvm.py"
  ],
  "test_targets": [
    "//clang-tools-extra/clangd/test:check-clangd",
    "//clang-tools-extra/test:check-clang-tools",
    "//clang/test:check-clang",
    "//lld/test:check-lld",
    "//llvm/test:check-llvm"
  ],
  "additional_compile_targets": []
}