different address spaces (was Re: internal compiler error at dwarf2out.c:8362)

[Björn Haase]

Martin,

I think that the AVR people would very much appreciate if you would report 
occasionally on your progresses concerning your realization of the different 
address space issue on your personal HC05 port. (In my opionion, the lack for 
support of different memory spaces is the key weakness of the present avr 
port and I think that any avr-gcc user would be very happy if this weakness 
could be removed some day.)

While I think, that I now have quite a clear picture on which kind of 
modifications would be required for the back-end (namely more sophisticated 
define_expand patterns and possibly some new unspecs (and corresponding 
define_insn/define_split patterns) for EEPROM and PMEM  ), I don't have any 
idea on how complicated the work on the tree level would be and of course, 
whether your approach generally would be suitable for being included in 
mainline gcc.

Yours,

Björn