This is the mail archive of the
gcc-bugs@gcc.gnu.org
mailing list for the GCC project.
[Bug tree-optimization/79389] [7 Regression] 30% performance regression in SciMark2 MonteCarlo
- From: "jakub at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Wed, 22 Feb 2017 17:08:10 +0000
- Subject: [Bug tree-optimization/79389] [7 Regression] 30% performance regression in SciMark2 MonteCarlo
- Auto-submitted: auto-generated
- References: <bug-79389-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79389
--- Comment #12 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
At -O3 it is caused by the r238005 change as written earlier, that is really
not a beneficial optimization in this case. -O3 -fno-split-paths should still
see the benefit of the patch I've attached. So we need some patch from Richard
too or a way to undo the damage afterwards (still in GIMPLE or on RTL).