From fe7962c6cc54a5d5f80db90ccc06b8603ddeb74f Mon Sep 17 00:00:00 2001 From: Mahesh Bodapati Date: Tue, 17 Jan 2017 17:33:31 +0530 Subject: [PATCH 21/58] [Patch] OPT: Update heuristics for loop-invariant for address arithmetic The changes are made in the patch to update the heuristics for loop invariant for address arithmetic. The heuristics is changed to calculate the estimated register pressure cost when ira based register pressure is not enabled. The estimated register pressure cost modifies the existing calculation cost associated to perform the Loop invariant code motion for address arithmetic. ChangeLog: 2015-06-17 Ajit Agarwal Nagaraju Mekala * loop-invariant.c (gain_for_invariant): update the heuristics for estimate_reg_pressure_cost. Signed-off-by:Ajit Agarwal ajitkum@xilinx.com Nagaraju Mekala nmekala@xilinx.com --- gcc/loop-invariant.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) diff --git a/gcc/loop-invariant.c b/gcc/loop-invariant.c index 37ae6549e56..f6385d6cf43 100644 --- a/gcc/loop-invariant.c +++ b/gcc/loop-invariant.c @@ -1465,10 +1465,8 @@ gain_for_invariant (struct invariant *inv, unsigned *regs_needed, if (! flag_ira_loop_pressure) { - size_cost = (estimate_reg_pressure_cost (new_regs[0] + regs_needed[0], - regs_used, speed, call_p) - - estimate_reg_pressure_cost (new_regs[0], - regs_used, speed, call_p)); + size_cost = estimate_reg_pressure_cost (regs_needed[0], + regs_used, speed, call_p); } else if (ret < 0) return -1; -- 2.17.1