gn analyze output:
{
  "compile_targets": [],
  "status": "No dependency",
  "test_targets": []
}
gn analyze input:
{
  "files": [
    "//llvm/test/CodeGen/AMDGPU/amdgcn.bitcast.1024bit.ll",
    "//llvm/test/CodeGen/AMDGPU/call-args-inreg-no-sgpr-for-csrspill-xfail.ll",
    "//llvm/test/CodeGen/AMDGPU/illegal-sgpr-to-vgpr-copy.ll",
    "//llvm/test/CodeGen/AMDGPU/sgpr-regalloc-flags.ll",
    "//llvm/test/CodeGen/AMDGPU/shufflevector-physreg-copy.ll",
    "//llvm/test/CodeGen/AMDGPU/swdev503538-move-to-valu-stack-srd-physreg.ll",
    "//llvm/test/CodeGen/AMDGPU/tail-call-inreg-arguments.error.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": []
}