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[Bug tree-optimization/53342] [4.8 Regression] rnflow.f90 is ~5% slower after revision 187340
- From: "rguenth at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Tue, 05 Feb 2013 13:52:16 +0000
- Subject: [Bug tree-optimization/53342] [4.8 Regression] rnflow.f90 is ~5% slower after revision 187340
- Auto-submitted: auto-generated
- References: <bug-53342-4@http.gcc.gnu.org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53342
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Attachment #29356|0 |1
is obsolete| |
--- Comment #12 from Richard Biener <rguenth at gcc dot gnu.org> 2013-02-05 13:52:16 UTC ---
Created attachment 29359
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=29359
updated patch
Updated patch that does not miscompile rnflow. Simplified as well...
0: 0:17.264 -> Completed program execution
with patch,
0: 0:19.462 -> Completed program execution
with strided load vectorization disabled,
0: 0:17.929 -> Completed program execution
without patch. -Ofast -funroll-loops with generic on an old iCore (fam 6,
model 30)
Not sure what the original regression was against (certainly not against
enabling strided load vectorization?)