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[Bug tree-optimization/54073] [4.7/4.8 Regression] SciMark Monte Carlo test performance has seriously decreased in recent GCC releases
- From: "markus at trippelsdorf dot de" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Thu, 26 Jul 2012 16:13:33 +0000
- Subject: [Bug tree-optimization/54073] [4.7/4.8 Regression] SciMark Monte Carlo test performance has seriously decreased in recent GCC releases
- Auto-submitted: auto-generated
- References: <bug-54073-4@http.gcc.gnu.org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54073
--- Comment #6 from Markus Trippelsdorf <markus at trippelsdorf dot de> 2012-07-26 16:13:33 UTC ---
(In reply to comment #5)
> is this same as http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53397
No. Monto Carlo is independent of FFT.
I can confirm the huge drop of the FFT score with -march=amdfam10.
(-flto doesn't help in this case.)