1 files changed, 47 insertions, 0 deletions

diff --git a/meta-microblaze/recipes-devtools/gcc/gcc-10/0021-Patch-OPT-Update-heuristics-for-loop-invariant-for-a.patch b/meta-microblaze/recipes-devtools/gcc/gcc-10/0021-Patch-OPT-Update-heuristics-for-loop-invariant-for-a.patch
new file mode 100644
index 00000000..b4d03172
--- /dev/null
+++ b/meta-microblaze/recipes-devtools/gcc/gcc-10/0021-Patch-OPT-Update-heuristics-for-loop-invariant-for-a.patch
@@ -0,0 +1,47 @@
+From fe7962c6cc54a5d5f80db90ccc06b8603ddeb74f Mon Sep 17 00:00:00 2001
+From: Mahesh Bodapati <mbodapat@xilinx.com>
+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  <ajitkum@xilinx.com>
+            Nagaraju Mekala <nmekala@xilinx.com>
+
+        * 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
+