gn analyze output:
{
  "compile_targets": [],
  "status": "No dependency",
  "test_targets": []
}
gn analyze input:
{
  "files": [
    "//llvm/test/MC/AMDGPU/ds-err.s",
    "//llvm/test/MC/AMDGPU/flat.s",
    "//llvm/test/MC/AMDGPU/regression/bug28538.s",
    "//llvm/test/MC/AMDGPU/sop1-err.s",
    "//llvm/test/MC/AMDGPU/sop2.s",
    "//llvm/test/MC/AMDGPU/sopk-err.s",
    "//llvm/test/MC/AMDGPU/sopp-err.s",
    "//llvm/test/MC/AMDGPU/trap.s",
    "//llvm/test/MC/AMDGPU/vop2-err.s",
    "//llvm/test/MC/AMDGPU/vopc-errs.s"
  ],
  "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": []
}