[tree-ssa] POOMA compile time / memory requirement comparison

[Mark Mitchell]

>>I see two options here: (a) unfreeze the branch and do whatever work is
>>necessary to bring POOMA in line with mainline, (b) continue with the
>>merge and address these problems in mainline.
>>
>>IMO option (a) is too costly and may only serve to delay tree-ssa even
>>more.  I suspect that much of the necessary work to reduce this gap
>>involves removing RTL passes and/or doing major surgery on trees, memory
>>allocation (the system times are pretty bad).
> 

A compromise position would be to attempt to prove (by measuring) that 
eliminating the RTL passes would help.  Can you quantify the time spent 
in the RTL passes that will hopefully soon be eliminated?

-- 
Mark Mitchell
CodeSourcery, LLC
mark@codesourcery.com