# HG changeset patch
# User Doug Simon <doug.simon@oracle.com>
# Date 1367844797 -7200
# Node ID 50779b21024b4480a750f695b6557be907fd3a6a
# Parent  df3aa336a313090608c3e8d532cf3be2c27869cf
modified PiPushable implementation for IsNullNode to account for an input that is an unsafe cast from a word value

diff -r df3aa336a313 -r 50779b21024b graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/calc/IsNullNode.java
--- a/graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/calc/IsNullNode.java	Mon May 06 14:14:08 2013 +0200
+++ b/graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/calc/IsNullNode.java	Mon May 06 14:53:17 2013 +0200
@@ -83,12 +83,13 @@
     @Override
     public boolean push(PiNode parent) {
         ObjectStamp piStamp = parent.objectStamp();
-        ObjectStamp piValueStamp = parent.object().objectStamp();
-        if (piStamp.nonNull() == piValueStamp.nonNull() && piStamp.alwaysNull() == piValueStamp.alwaysNull()) {
-            replaceFirstInput(parent, parent.object());
-            return true;
-        } else {
-            return false;
+        if (parent.object().kind() == Kind.Object) {
+            ObjectStamp piValueStamp = parent.object().objectStamp();
+            if (piStamp.nonNull() == piValueStamp.nonNull() && piStamp.alwaysNull() == piValueStamp.alwaysNull()) {
+                replaceFirstInput(parent, parent.object());
+                return true;
+            }
         }
+        return false;
     }
 }