# HG changeset patch
# User Christian Humer <christian.humer@gmail.com>
# Date 1409749133 -7200
# Node ID ff0ec169843b834d7ad249f01d6c9cf1804f09ed
# Parent  7b45e33b79861e34e5e08abb67f61e0b0171d18b
Fixed loop phis with itself as single back value did not canonicalize. (contributed by Lukas Stadler)

diff -r 7b45e33b7986 -r ff0ec169843b graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/PhiNode.java
--- a/graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/PhiNode.java	Wed Sep 03 14:58:53 2014 +0200
+++ b/graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/PhiNode.java	Wed Sep 03 14:58:53 2014 +0200
@@ -193,7 +193,13 @@
 
     @Override
     public void simplify(SimplifierTool tool) {
-        ValueNode singleValue = singleValue();
+        ValueNode singleValue;
+
+        if (isLoopPhi() && singleBackValue() == this) {
+            singleValue = firstValue();
+        } else {
+            singleValue = singleValue();
+        }
 
         if (singleValue != MULTIPLE_VALUES) {
             for (Node node : usages().snapshot()) {