gn analyze output:
{
  "compile_targets": [],
  "status": "No dependency",
  "test_targets": []
}
gn analyze input:
{
  "files": [
    "//mlir/include/mlir/Conversion/MathToEmitC/MathToEmitC.h",
    "//mlir/include/mlir/Conversion/MathToEmitC/MathToEmitCPass.h",
    "//mlir/include/mlir/Conversion/Passes.h",
    "//mlir/include/mlir/Conversion/Passes.td",
    "//mlir/lib/Conversion/CMakeLists.txt",
    "//mlir/lib/Conversion/MathToEmitC/CMakeLists.txt",
    "//mlir/lib/Conversion/MathToEmitC/MathToEmitC.cpp",
    "//mlir/lib/Conversion/MathToEmitC/MathToEmitCPass.cpp",
    "//mlir/test/Conversion/MathToEmitC/math-to-emitc-failed.mlir",
    "//mlir/test/Conversion/MathToEmitC/math-to-emitc.mlir",
    "//utils/bazel/llvm-project-overlay/mlir/BUILD.bazel"
  ],
  "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": []
}