gn analyze output:
{
  "compile_targets": [],
  "status": "No dependency",
  "test_targets": []
}
gn analyze input:
{
  "files": [
    "//flang/lib/Optimizer/CodeGen/CodeGen.cpp",
    "//flang/lib/Optimizer/CodeGen/TypeConverter.cpp",
    "//flang/test/Fir/alloc-32.fir",
    "//flang/test/Fir/alloc.fir",
    "//flang/test/Integration/OpenMP/private-global.f90",
    "//flang/test/Lower/OpenMP/parallel-reduction-mixed.f90",
    "//flang/test/Lower/forall/character-1.f90"
  ],
  "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": []
}