[Bug tree-optimization/54776] [4.8 Regression] tramp3d-v4: 20% performance regression using -O3

[markus at trippelsdorf dot de]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54776

--- Comment #6 from Markus Trippelsdorf <markus at trippelsdorf dot de> 2012-10-04 16:16:58 UTC ---
(In reply to comment #5)
> I assume it is with linker plugin, right?

Yes.

> I assume you do see improvements with -O3 -fwhole-program?  (it improves the
> scores in my setup, I would be curious to see how it compares to other numbers
> you report)

Yes, with -O3 -fwhole-program I get:
 Time spent in iteration: 6.34161

(With -fprofile-use -Ofast -march=native:
 Time spent in iteration: 2.75908 )