With the following patch stack (that definitely needs some cleanup): 1. https://github.com/llvm/llvm-project/pull/191664 2. https://github.com/llvm/llvm-project/pull/191579 3. https://github.com/llvm/llvm-project/pull/191665 4. https://github.com/llvm/llvm-project/pull/191667 5. https://github.com/llvm/llvm-project/pull/192371 6. https://github.com/llvm/llvm-project/pull/192830 7. https://github.com/llvm/llvm-project/pull/192831 We can now bootstrap LLVM using the NewPM on x86! All LLVM tests pass except for Other/print-on-crash.ll which needs some further investigation.