gn analyze output:
{
  "compile_targets": [],
  "status": "Found dependency",
  "test_targets": [
    "//llvm/test:check-llvm"
  ]
}
gn analyze input:
{
  "files": [
    "//flang/lib/Optimizer/CodeGen/Target.cpp",
    "//flang/test/Fir/target-rewrite-complex16.fir",
    "//llvm/unittests/Analysis/PhiValuesTest.cpp",
    "//mlir/include/mlir/Dialect/LLVMIR/LLVMIntrinsicOps.td",
    "//mlir/lib/Dialect/LLVMIR/IR/LLVMMemorySlot.cpp",
    "//mlir/test/Dialect/LLVMIR/mem2reg.mlir",
    "//mlir/test/Dialect/LLVMIR/roundtrip.mlir",
    "//mlir/test/Target/LLVMIR/Import/intrinsic.ll",
    "//mlir/test/Target/LLVMIR/llvmir-intrinsics.mlir"
  ],
  "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": []
}