472c79ca52
Verify that the arguments of a naked function are not used. They can only be referenced via registers/stack in inline asm, not as IR values. Doing so will result in assertion failures in the backend. There's probably more that we should verify, though I'm not completely sure what the constraints are (would it be correct to require that naked functions are exactly an inline asm call + unreachable, or is more allowed?) Fixes https://github.com/llvm/llvm-project/issues/104718.