porting 8051: Internal compiler error in `instantiate_virtual_regs_1', at function.c:4027

[Martin v. Loewis]

> How can I find out about that problem and fix it?

I can't answer your other questions, but I can answer this one :-)

Start a debugger for cc1, and run the program. Set a breakpoint on
fatal(), so you'll catch the internal error. When the breakpoint is
reached, go to the instantiate_virtual_regs_1 stack frame and inspect
the local variables.

Regards,
Martin