[LLVMdev] major dragonegg improvement

Owen Anderson resistor at me.com
Tue Sep 6 12:03:15 PDT 2011

Seems very likely to be related to Andy's SCEV-unroll-loops changes.


On Sep 6, 2011, at 11:56 AM, Jack Howarth wrote:

>  I'm not certain yet which commit in the last couple of days caused this,
> but the current llvm/dragonegg svn shows a major improvement in the runtime
> of the xplor-nih testsuite when xplor-nih is built with FSF gcc 4.6.1 and the
> dragonegg plugin at -O3 -ffast-math -funroll-loops. Previously the xplor-nih
> testsuite always executed in ~40 sec but now it is coming it at 34.5 sec which
> is about the same result seen for xplor-nih built with  native FSF gcc 4.6.1.
> It will be interesting to find out if the Polyhedron 2005 benchmarks shows this
> behavior as well. Nice.
>              Jack
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