Branch created for inter-compilation-unit references

[Andrew Cagney]

> 
>>  the constant schedule slip, ...
>>
> 
> tree-ssa was never on a schedule to begin with, so what the heck are you talking about?
> If you really want to play that card, it wasn't even supposed to be ready before 3.6
> The fact that it is ready for 3.5 means it certainly hasn't *slipped*. 

Er, it was originally, lets say, "hopeing" for 3.4 (or was it 3.3). 
Fortunatly the needed resources have now been dedicated to the task.

Andrew