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From 7156e379a67fa47a5fb9ede1448c0d528dbda65b Mon Sep 17 00:00:00 2001
From: Mahesh Bodapati <mbodapat@xilinx.com>
Date: Thu, 2 Mar 2017 19:02:31 +0530
Subject: [PATCH 36/54] [Patch,Microblaze]:reverting the cost check before
propagating constants.
---
gcc/cprop.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/gcc/cprop.c b/gcc/cprop.c
index e4df509..deb706b 100644
--- a/gcc/cprop.c
+++ b/gcc/cprop.c
@@ -733,6 +733,7 @@ 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;
@@ -744,6 +745,7 @@ 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
@@ -752,6 +754,7 @@ 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. */
@@ -764,6 +767,7 @@ 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
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