On Wed, Nov 20, 2013 at 10:26 AM, Gopalasubramanian, Ganesh <ganesh.gopalasubraman...@amd.com> wrote: > Hi, > > Steamroller processors contain a loop predictor and a loop buffer, which may > make unrolling small loops less important. > When unrolling small loops for steamroller, making the unrolled loop fit in > the loop buffer should be a priority. > > This patch uses a heuristic approach (number of memory references) to decide > the unrolling factor for small loops. > This patch has some noise in SPEC 2006 results. > > Bootstrapping passes. > > I would like to know your comments before committing. >
I suggest you add this to x86-tune.def and enable it for bdver3 and bdver4. -- H.J.
