# HG changeset patch
# User Lukas Stadler <lukas.stadler@oracle.com>
# Date 1402676337 -7200
# Node ID 13e471b673f3a10c118de2cbc46cc1f9bd433f6f
# Parent  0d1f79e8add9a64c71cb802393336f5741b43049
handle deleted nodes in IfNode.simplify

diff -r 0d1f79e8add9 -r 13e471b673f3 graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/IfNode.java
--- a/graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/IfNode.java	Fri Jun 13 18:18:28 2014 +0200
+++ b/graal/com.oracle.graal.nodes/src/com/oracle/graal/nodes/IfNode.java	Fri Jun 13 18:18:57 2014 +0200
@@ -229,15 +229,17 @@
                         trueNext.replaceAtPredecessor(next);
                         graph().addBeforeFixed(this, trueNext);
                         for (Node usage : trueNext.usages().snapshot()) {
-                            if (usage.getNodeClass().valueNumberable() && !usage.getNodeClass().isLeafNode()) {
-                                Node newNode = graph().findDuplicate(usage);
-                                if (newNode != null) {
-                                    usage.replaceAtUsages(newNode);
-                                    usage.safeDelete();
+                            if (usage.isAlive()) {
+                                if (usage.getNodeClass().valueNumberable() && !usage.getNodeClass().isLeafNode()) {
+                                    Node newNode = graph().findDuplicate(usage);
+                                    if (newNode != null) {
+                                        usage.replaceAtUsages(newNode);
+                                        usage.safeDelete();
+                                    }
                                 }
-                            }
-                            if (usage.isAlive()) {
-                                tool.addToWorkList(usage);
+                                if (usage.isAlive()) {
+                                    tool.addToWorkList(usage);
+                                }
                             }
                         }
                         continue;