Hello Vladimir: Did you get a chance to look at the below patch.
Thanks & Regards Ajit -----Original Message----- From: gcc-patches-ow...@gcc.gnu.org [mailto:gcc-patches-ow...@gcc.gnu.org] On Behalf Of Ajit Kumar Agarwal Sent: Friday, February 27, 2015 11:25 AM To: vmaka...@redhat.com; Jeff Law; GCC Patches Cc: Vinod Kathail; Shail Aditya Gupta; Vidhumouli Hunsigida; Nagaraju Mekala Subject: [Patch] IRA: Update heuristics for optimal coalescing Hello Vladimir: The changes in the patch are made in the frequency heuristics for optimal coalescing. The Loop back edge frequencies are taken instead of the block frequency for optimal coalescing. Ignores the frequency for the loop for the allocno not having references inside the loops but spans the loops and live at the exit block of the loop. Another similar change are made not to consider allcono frequency at the cost calculation but to consider the loop back edge frequencies having references and spans through the loop and live at the exit of the block. We have tested the changes with MIBench and EEMBC benchmarks and there is a gain in the Geomean for the overall benchmarks for Microblaze target. Also no regressions are seen in deja GNU tests run for microblaze. Please let us know with your feedbacks. commit e6a2edd3794080a973695f80e77df3e7de55452d Author: Ajit Kumar Agarwal <ajitkum@xhdspdgnu.(none)> Date: Fri Feb 27 11:15:48 2015 +0530 IRA: Update heuristics for optimal coalescing. The changes are made in the frequency heuristics for optimal coalescing. The Loop back edge frequencies are taken instead of the block frequency for optimal coalescing. Ignores the frequency for the loop having not any references but spans the loop and live at the exit block of the loop. Another similar change not to consider allcono frequency at the cost calculation but to consider the loop back edge frequencies having references and spans through the loop and live at the exit of the block. ChangeLog: 2015-02-27 Ajit Agarwal <ajit...@xilinx.com> * ira-color.c (ira_loop_back_edge_freq): New. (coalesce_allocnos): Use of ira_loop_back_edge_freq to update the back edge frequencies. (setup_coalesced_allocno_costs_and_nums): Use of ira_loop_back_edge_freq to update the cost. Signed-off-by:Ajit Agarwal ajit...@xilinx.com Thanks & Regards Ajit
