From c1a7b7a0779999b8896e1f221722c30d78349de3 Mon Sep 17 00:00:00 2001
From: zhenyu--zhao_admin <zhaozhenyu17@huawei.com>
Date: Mon, 22 Apr 2024 08:47:08 +0800
Subject: [PATCH] [BACKPORT] RA Improve cost calculation of pseudos with
 equivale

---
 gcc/ira-costs.cc | 11 ++---------
 1 file changed, 2 insertions(+), 9 deletions(-)

diff --git a/gcc/ira-costs.cc b/gcc/ira-costs.cc
index 642fda5293b..c0464aea62b 100644
--- a/gcc/ira-costs.cc
+++ b/gcc/ira-costs.cc
@@ -1940,15 +1940,8 @@ find_costs_and_classes (FILE *dump_file)
 	    }
 	  if (i >= first_moveable_pseudo && i < last_moveable_pseudo)
 	    i_mem_cost = 0;
-	  else if (equiv_savings < 0)
-	    i_mem_cost = -equiv_savings;
-	  else if (equiv_savings > 0)
-	    {
-	      i_mem_cost = 0;
-	      for (k = cost_classes_ptr->num - 1; k >= 0; k--)
-		i_costs[k] += equiv_savings;
-	    }
-
+	  else
+            i_mem_cost -= equiv_savings;
 	  best_cost = (1 << (HOST_BITS_PER_INT - 2)) - 1;
 	  best = ALL_REGS;
 	  alt_class = NO_REGS;
-- 
Gitee