From 2f22090a7e8216f7a9f7e958b77ac83006a7ce89 Mon Sep 17 00:00:00 2001
From: Mahesh Bodapati <mbodapat@xilinx.com>
Date: Tue, 16 Apr 2019 17:20:24 +0530
Subject: [PATCH 59/61] Reverting the patch as kernel boot is not working with
 this patch CR-1026413 Revert "[Patch,Microblaze]:reverting the cost check
 before propagating constants."

This reverts commit 7156e379a67fa47a5fb9ede1448c0d528dbda65b.
---
 gcc/cprop.c | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/gcc/cprop.c b/gcc/cprop.c
index deb706b..e4df509 100644
--- a/gcc/cprop.c
+++ b/gcc/cprop.c
@@ -733,7 +733,6 @@ try_replace_reg (rtx from, rtx to, rtx_insn *insn)
   int success = 0;
   rtx set = single_set (insn);
 
-#if 0
   bool check_rtx_costs = true;
   bool speed = optimize_bb_for_speed_p (BLOCK_FOR_INSN (insn));
   int old_cost = set ? set_rtx_cost (set, speed) : 0;
@@ -745,7 +744,6 @@ try_replace_reg (rtx from, rtx to, rtx_insn *insn)
 	  && (GET_CODE (XEXP (note, 0)) == CONST
 	      || CONSTANT_P (XEXP (note, 0)))))
     check_rtx_costs = false;
-#endif
 
   /* Usually we substitute easy stuff, so we won't copy everything.
      We however need to take care to not duplicate non-trivial CONST
@@ -754,7 +752,6 @@ try_replace_reg (rtx from, rtx to, rtx_insn *insn)
 
   validate_replace_src_group (from, to, insn);
 
-#if 0
   /* If TO is a constant, check the cost of the set after propagation
      to the cost of the set before the propagation.  If the cost is
      higher, then do not replace FROM with TO.  */
@@ -767,7 +764,6 @@ try_replace_reg (rtx from, rtx to, rtx_insn *insn)
       return false;
     }
 
-#endif
 
   if (num_changes_pending () && apply_change_group ())
     success = 1;
-- 
2.7.4