RFA: Saving fixed call-saved registers in unwind functions and setjmp callers

[Richard Sandiford]

Eric Botcazou <ebotcazou@libertysurf.fr> writes:
>> Thanks.  I installed this revised version of the MIPS16 patch after
>> regression-testing on mipsisa32r2-sde-elf.
>
> Do you still want to submit the generic part of your original patch?

Nah, it's OK, thanks.  I think Roman's patch does all I need.  (TBH,
I was tempted to add a boolean to struct function too, but shied away
from it because I didn't think it'd be accepted.  It does seem cleaner
than redefining what "fixedness" means for !call_really_used registers.)

Richard