gn analyze output:
{
  "compile_targets": [],
  "status": "Found dependency",
  "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"
  ]
}
gn analyze input:
{
  "files": [
    "//llvm/lib/CodeGen/EarlyIfConversion.cpp",
    "//llvm/lib/CodeGen/MachineBasicBlock.cpp",
    "//llvm/lib/CodeGen/MachineOperand.cpp",
    "//llvm/lib/CodeGen/MachinePipeliner.cpp",
    "//llvm/lib/CodeGen/MachineRegisterInfo.cpp",
    "//llvm/lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp",
    "//llvm/lib/CodeGen/TargetRegisterInfo.cpp",
    "//llvm/lib/Target/AArch64/AArch64InstrInfo.cpp",
    "//llvm/lib/Target/AMDGPU/AMDGPULegalizerInfo.cpp",
    "//llvm/lib/Target/NVPTX/NVPTXRegisterInfo.cpp",
    "//llvm/lib/Target/PowerPC/PPCRegisterInfo.cpp",
    "//llvm/lib/Target/X86/X86ArgumentStackSlotRebase.cpp",
    "//llvm/lib/Target/X86/X86RegisterInfo.cpp"
  ],
  "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": []
}