gn analyze output:
{
  "compile_targets": [],
  "status": "No dependency",
  "test_targets": []
}
gn analyze input:
{
  "files": [
    "//llvm/lib/Target/DirectX/DXILPrepare.cpp",
    "//llvm/lib/Target/DirectX/DXILShaderFlags.cpp",
    "//llvm/lib/Target/DirectX/DXILWriter/DXILBitcodeWriter.cpp",
    "//llvm/test/CodeGen/DirectX/ShaderFlags/lifetimes-noint64op.ll",
    "//llvm/test/CodeGen/DirectX/legalize-lifetimes-valver-1.6.ll",
    "//llvm/test/tools/dxil-dis/lifetimes.ll"
  ],
  "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": []
}