From: Tom de Vries <tom@codesourcery.com>
Date: Wed, 18 May 2011 18:27:11 +0000 (+0000)
Subject: re PR middle-end/45098 (Missed induction variable optimization)
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=b5ee67520324dd4185e13374613b55970cfe5169;p=gcc.git

re PR middle-end/45098 (Missed induction variable optimization)

2011-05-18  Tom de Vries  <tom@codesourcery.com>

	PR target/45098
	* tree-ssa-loop-ivopts.c (computation_cost): Prevent cost of 0.

From-SVN: r173872
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index dc2495e9907..624016c4bc0 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2011-05-18  Tom de Vries  <tom@codesourcery.com>
+
+	PR target/45098
+	* tree-ssa-loop-ivopts.c (computation_cost): Prevent cost of 0.
+
 2011-05-18  Uros Bizjak  <ubizjak@gmail.com>
 
 	* config/i386/i386.md (*tls_global_dynamic_32_gnu): Split asm template.
diff --git a/gcc/tree-ssa-loop-ivopts.c b/gcc/tree-ssa-loop-ivopts.c
index 13c2b407cc2..501dbbf4526 100644
--- a/gcc/tree-ssa-loop-ivopts.c
+++ b/gcc/tree-ssa-loop-ivopts.c
@@ -2866,6 +2866,8 @@ computation_cost (tree expr, bool speed)
   if (MEM_P (rslt))
     cost += address_cost (XEXP (rslt, 0), TYPE_MODE (type),
 			  TYPE_ADDR_SPACE (type), speed);
+  else if (!REG_P (rslt))
+    cost += rtx_cost (rslt, SET, speed);
 
   return cost;
 }