The patch that disables default setting of unaligned load splitting for bdver1 has been committed to trunk as revision 175230.
Here is the patch: http://gcc.gnu.org/ml/gcc-patches/2011-06/msg01518.html. H. J., is there anything else that is pending to fix at this moment regarding avx256 load/store splitting? If no, can we backport the set of patches to 4.6 branch now? Thanks, Changpeng ________________________________________ From: Jagasia, Harsha Sent: Monday, June 20, 2011 12:03 PM To: 'H.J. Lu' Cc: 'gcc-patches@gcc.gnu.org'; 'hubi...@ucw.cz'; 'ubiz...@gmail.com'; 'hongjiu...@intel.com'; Fang, Changpeng Subject: RE: Backport AVX256 load/store split patches to gcc 4.6 for performance boost on latest AMD/Intel hardware. > On Mon, Jun 20, 2011 at 9:58 AM, <harsha.jaga...@amd.com> wrote: > > Is it ok to backport patches, with Changelogs below, already in trunk > to gcc > > 4.6? These patches are for AVX-256bit load store splitting. These > patches > > make significant performance difference >=3% to several CPU2006 and > > Polyhedron benchmarks on latest AMD and Intel hardware. If ok, I will > post > > backported patches for commit approval. > > > > AMD plans to submit additional patches on AVX-256 load/store > splitting to > > trunk. We will send additional backport requests for those later once > they > > are accepted/comitted to trunk. > > > > Since we will make some changes on trunk, I would prefer to to do > the backport after trunk change is finished. Ok, thanks. Adding Changpeng who is working on the trunk changes. Harsha
