From 17021bc8cbb9724e7cadb4984d11d5822e59df3a Mon Sep 17 00:00:00 2001
From: Richard Guenther <rguenther@suse.de>
Date: Sat, 28 Mar 2009 12:54:14 +0000
Subject: [PATCH] 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
---
gcc/ChangeLog | 6 ++++++
gcc/tree-ssa-copy.c | 2 +-
2 files changed, 7 insertions(+), 1 deletion(-)
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;
}
--
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