more m68k breakage on m68k-linux

[Roman Zippel]

Hi,

Richard Zidlicky wrote:

> hm.. the problem I see is that the register allocator is initialised
> with random garbage. Eg FIXED_REGISTERS is 24 elts big, thus 
> initial_fixed_regs[] is also only 24 elts and in init_reg_sets() we
> copy a random 25th elt into fixed_regs[] and risk segfault.
> I am pretty sure more it results in more damage later on.

I can confirm that it causes problems, after fixing FIXED_REGISTERS and 
CALL_USED_REGISTERS I can finally bootstrap gcc again, but my tree has 
another fix for a subtle miscompilation, which I still have to test 
separately. reg_class and all related macros still have to be fixed though.

bye, Roman