Re: Multiplexed registers and invalidating the register cache

[Orjan Friberg <orjan dot friberg at axis dot com>]

Andrew Cagney wrote:
> Consider the effect of modifying the $sp.
>
> While it might in theory be possible to implement some sort of 
> complicated look-aside cache schema, in reality there is zero return on 
> investment.  Since recovery from the flush can't be slower than recovery 
> from single-step, and single step is way way more critical, we should 
> focus on single step.

Ok, I'm convinced that the whole frame cache should be discarded, except 
I must be missing something since calling flush_cached_frames doesn't 
refetch the current set of registers (like calling registers_changed does).

--
Orjan Friberg
Axis Communications