patch applied (ghc): SPARC NCG: HpLim is now always stored on the stack, not in a register

[Simon Marlow]

Ben Lippmeier wrote:
> Mon Mar 30 22:19:00 PDT 2009  Ben.Lippmeier at anu.edu.au
>   * SPARC NCG: HpLim is now always stored on the stack, not in a register
>      This fixes the out of memory errors we were getting on sparc
>      after the following patch:
>   
>        Fri Mar 13 03:45:16 PDT 2009  Simon Marlow <marlowsd at gmail.com>
>        * Instead of a separate context-switch flag, set HpLim to zero
>        Ignore-this: 6c5bbe1ce2c5ef551efe98f288483b0
>        This reduces the latency between a context-switch being triggered and
>        the thread returning to the scheduler, which in turn should reduce the
>        cost of the GC barrier when there are many cores. 
> 
>     M ./compiler/nativeGen/SPARC/Regs.hs -3 +4
>     M ./includes/MachRegs.h -1 +5

Sorry about that - I hadn't noticed that the sparc NCG had these 
hard-coded.  Would it be possible to do it like the other backends where 
all the information is taken from MachRegs.h?

Cheers,
	Simon