From: Richard Guenther <rguenther@suse.de>
Date: Sat, 28 Mar 2009 12:54:14 +0000 (+0000)
Subject: re PR tree-optimization/38458 (copy-propagation doesn't handle cycles)
X-Git-Tag: releases/gcc-4.5.0~7093
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=17021bc8cbb9724e7cadb4984d11d5822e59df3a;p=thirdparty%2Fgcc.git

re PR tree-optimization/38458 (copy-propagation doesn't handle cycles)

2009-03-28  Richard Guenther  <rguenther@suse.de>

	PR tree-optimization/38458
	* tree-ssa-copy.c (copy_prop_visit_phi_node): For the first
	argument use the arguments copy-of value.

From-SVN: r145185
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 4b746cdb319b..7e842a0c2630 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2009-03-28  Richard Guenther  <rguenther@suse.de>
+
+	PR tree-optimization/38458
+	* tree-ssa-copy.c (copy_prop_visit_phi_node): For the first
+	argument use the arguments copy-of value.
+
 2009-03-28  Richard Guenther  <rguenther@suse.de>
 
 	PR tree-optimization/38180
diff --git a/gcc/tree-ssa-copy.c b/gcc/tree-ssa-copy.c
index 64c697a51968..8f060c2b5a20 100644
--- a/gcc/tree-ssa-copy.c
+++ b/gcc/tree-ssa-copy.c
@@ -892,7 +892,7 @@ copy_prop_visit_phi_node (gimple phi)
 	 memory reference of all the other arguments.  */
       if (phi_val.value == NULL_TREE)
 	{
-	  phi_val.value = arg;
+	  phi_val.value = arg_val->value;
 	  continue;
 	}