Steve Ellcey wrote:
This seems unfortunate. I was hoping I might be able to turn on loop unrolling for IA64 at -O2 to improve performance. I have only started looking into this idea but it seems to help performance quite a bit, though it is also increasing size quite a bit too so it may need some modification of the unrolling parameters to make it practical.
To me it is obvious that optimizations are target dependent. For instance loop unrolling is really a totally different optimization on the ia64 as a result of the rotating registers.
