From: Richard Guenther <rguenther@suse.de>
Date: Sat, 28 Mar 2009 16:02:18 +0000 (+0000)
Subject: tree-ssa-copy.c (copy_prop_visit_phi_node): Do not leave the PHIs value undefined.
X-Git-Tag: releases/gcc-4.5.0~7087
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=fbb789d49a45ad77c8af271a673f305401f2b134;p=thirdparty%2Fgcc.git

tree-ssa-copy.c (copy_prop_visit_phi_node): Do not leave the PHIs value undefined.

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

	* tree-ssa-copy.c (copy_prop_visit_phi_node): Do not leave
	the PHIs value undefined.

From-SVN: r145193
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index e1fac756fedb..9cf73c24bb68 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2009-03-28  Richard Guenther  <rguenther@suse.de>
+
+	* tree-ssa-copy.c (copy_prop_visit_phi_node): Do not leave
+	the PHIs value undefined.
+
 2009-03-28  Jan Hubicka  <jh@suse.cz>
 
 	* tree-pass.h (pass_fixup_cfg): New pass.
diff --git a/gcc/tree-ssa-copy.c b/gcc/tree-ssa-copy.c
index 8f060c2b5a20..5b3616394bb8 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_val->value;
+	  phi_val.value = arg_val->value ? arg_val->value : arg;
 	  continue;
 	}