100% speed improvement 3.4 -> 3.5 for ia64!! (?)

[Richard Guenther]

Hi!

I just got the first run-time results for a gcc3.5 ia64 run with leafified
tramp3d-v3 testcase and am impressed by the improvement compared to the
3.4 release candidate.  3.4 takes 7.34s/it while 3.5 finishes in an
astonishing 4s/it.  At a first glance, numerical results are within error.

Anyone has an idea what improved so much for ia64 compared to 3.4?  Only
flags I'm using are -O2 -funroll-loops -ffast-math, numerics are mostly
FP multiplication/addition.  Do I need to be concerned and investigate
results more closely?

Thanks for these improvements! GCC is now as fast as Intel with OpenMP on
2 processors!

Richard.

--
Richard Guenther <richard dot guenther at uni-tuebingen dot de>
WWW: http://www.tat.physik.uni-tuebingen.de/~rguenth/