IRA patch: move clobbers downwards

[Vladimir Makarov]

Bernd Schmidt wrote:
> On 07/13/2010 06:19 PM, Jeff Law wrote:
>
>   
>
> Possibly something I have to do anyway for some of the PRs on my list.
>
> I haven't tried if -fsched-pressure fixes this, but it seemed to help
> with some other issues I've seen recently.  Can we make this the default?
>
>   
As I remember there were some issues for -fsched-pressure on powerpc.  I 
proposed to decide to make it default for specific targets to target 
maintainers.  -fsched-presurre could slow down the compiler a lot (like 
1-2%).

So I can not say that we should make it default for -O2 or -O3 without 
extensive benchmarking a lot of targets.   But I have no time or 
resources for this.