[Bug tree-optimization/18048] [4.0 Regression] mgrid loop performance regression with ivopts

[rakdver at atrey dot karlin dot mff dot cuni dot cz]

------- Additional Comments From rakdver at atrey dot karlin dot mff dot cuni dot cz  2004-10-22 21:16 -------
Subject: Re:  [4.0 Regression] mgrid loop performance regression with ivopts

> Daniel's DOM loop depth patch might help with this problem as well.
> http://gcc.gnu.org/ml/gcc-patches/2004-10/msg00931.html

Probably not (although large part of the regression is indeed caused by
ivopts -- dom interaction, it seems to be of quite different type).

I am just testing a patch that significantly decreases the regression
(unfortunately, some 10% remain even with the patch; hopefully I will
find reason for them soon).

Zdenek


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18048