[m68k] register renaming not properly tracking used registers

[Mark Mitchell]

Bernardo Innocenti wrote:

> Peter Barada wrote:
>
>> Here it is again with what I hope is correct formatting:
>>
>> gcc/ChangeLog:
>> 2004-09-103  Peter Barada <peter@the-baradas.com>
>>     * config/m68k/m68k.h (HARD_REGNO_RENAME_OK): New macro.
>>     * config/m68k/m68k.c (m68k_hard regno_rename_ok): Disallow
>>       renaming of non-live registers in interrupt functions.
>>     * config/m68k/m68k-protos.h (m68k_hard_regno_rename_ok): Add 
>> prototype.
>
>
>
> Thanks, I've committed your patch on mainline (with a couple of
> trivial spacing fixes).
>
> I'd also like to backport it to 3.4, with Mark's approval.

Does it fix a regression?

-- 
Mark Mitchell
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