I want this conversion (from MachineInstr to MCInst) in a MachineFunctionPass.
I know that X86MCInstLower converts the MachineInstr to MCInst. However, initializing X86MCInstLower requires an instance of X86AsmPrinter. X86AsmPrinter is in itself MachineFunctionPass which requires TargetMachine & and std::unique_ptr<MCStreamer> to be initiated. I cannot get TargetMachine from a MachineFunction as MachineFunction only returns const TargetMachine &. The TargetMachine constructor also does not have any copy-constructor from const TargetMachine.
Therefore, I am stuck at this point of conversion. Is there any way to run a registered pass and get its output, from within a MachineFunctionPass? X86AsmPrinter is registered under TargetRegistry with RegisterAsmPrinter. I wonder if we could utilize that.
There is a mailing list thread regarding this. However, that doesn't address the problem finally.
