A reload inheritance bug

[Mark Shinwell]

Bernd Schmidt wrote:
> Mark Shinwell wrote:
>> Do you think it should be the case that, at the point below, _any_ reload
>> with reg_rtx corresponding to a hard register should have the relevant
>> bit set in reload_spill_index?
> 
> I think so.  I'm attaching a patch below.  It appears to have no effect
> on all code I've tried - does it fix your test case?

As noted before, this does fix the test case; I've now regtested it
on arm-none-eabi and there are no regressions.  Do you want to take
care of applying it?

Mark