[Bug tree-optimization/16022] Excessive memory usage of vectorizer

[rguenth at tat dot physik dot uni-tuebingen dot de]

------- Additional Comments From rguenth at tat dot physik dot uni-tuebingen dot de  2004-08-24 08:40 -------
Subject: Re:  Excessive memory usage of vectorizer

On 24 Aug 2004, pinskia at gcc dot gnu dot org wrote:

> Can you test again, this time on the mainline as the vectorizer has been merged in?

With the parts of the vectorizer merged there is not a difference
between using (with leafification turned off)
-O2 -funroll-loops -ftime-report -march=pentium4 -mfpmath=sse
vs.
-O2 -funroll-loops -ftime-report -march=pentium4 -mfpmath=sse
-ftree-vectorize
we're using about 450MB for this (Machine with 2GB ram).

with leafification turned on (i.e. for some loops generate an
awful lot of BBs) its
550MB vs. 552MB.
Numbers do improve a little (470MB) if using -fno-exceptions, but
nowhere like the problem was on lno.

So on mainline this doesn't seem to be a problem.

Btw. on lno the problem seems to be fixed as well.

Thanks,
Richard.

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



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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=16022