> I have been using the pgcc kernel for about a day now, and so far so good.  
> pgcc is pretty flakely at -O6 (doesn't seem improve speed anyway), but it 
> built itself to stage 3 at -O2, so I'm fairly confident at that 
> optimization level. 

I wouldn't be.

It is well known that a three stage bootstrap is a very weak compiler
test.  That plus the c-torture tests are only a little bit better.

You really need something along the lines of a commercial test suite
(and a commercial performance suite) to have any real confidence in a
compiler.

	--jtc