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. Regards Ganesh
loop_unroll_bdver3.patch
Description: loop_unroll_bdver3.patch
